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[Core/SCD]

Browse Source 
.fixed SEEK command emulation (Lunar the Silver Star freeze regression)
.added .OGG files support for CD audio tracks (use same naming convention as
.WAV files, cf. README.pdf)

[Win32]
removed win32/SDL port makefile to prevent stupid websites like EmuCR from
compiling & distributing it (for the last time, it's a buggy, unstable &
incomplete port which is not meant to be used for anything but debugging)
This commit is contained in:
EkeEke 2013-06-16 23:38:47 +02:00
parent ff5771da47
commit c32af0586a
45 changed files with 11853 additions and 122 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Makefile.gc
View File

@ -18,16 +18,16 @@ include $(DEVKITPPC)/gamecube_rules
TARGET := genplus_cube
BUILD := build_cube
SOURCES := source source/m68k source/z80 source/sound source/ntsc source/input_hw source/cd_hw source/cart_hw source/cart_hw/svp \
source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds
source/tremor source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds
INCLUDES := source source/m68k source/z80 source/sound source/ntsc source/input_hw source/cd_hw source/cart_hw source/cart_hw/svp \
source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds \
source/tremor source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds \
$(BUILD)
#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
CFLAGS = -O3 -fomit-frame-pointer --param large-function-growth=800 --param inline-unit-growth=200 -Wall -Winline -Wno-strict-aliasing $(MACHDEP) $(INCLUDE) -DUSE_16BPP_RENDERING -DALT_RENDERER
CFLAGS = -O3 -fomit-frame-pointer --param large-function-growth=800 --param inline-unit-growth=200 -Wall -Winline -Wno-strict-aliasing $(MACHDEP) $(INCLUDE) -DUSE_LIBTREMOR -DUSE_16BPP_RENDERING -DALT_RENDERER
CXXFLAGS = $(CFLAGS)
LDFLAGS = $(MACHDEP) -Wl,-Map,$(notdir $@).map
@ -35,7 +35,7 @@ LDFLAGS = $(MACHDEP) -Wl,-Map,$(notdir $@).map
#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project
#---------------------------------------------------------------------------------
LIBS := -lpng -lfat -liso9660 -lvorbisidec -lasnd -logc -lm -lz
LIBS := -lpng -lfat -liso9660 -lasnd -logc -lm -lz
#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing

8
Makefile.wii
View File

@ -18,16 +18,16 @@ include $(DEVKITPPC)/wii_rules
TARGET := genplus_wii
BUILD := build_wii
SOURCES := source source/m68k source/z80 source/sound source/ntsc source/input_hw source/cd_hw source/cart_hw source/cart_hw/svp \
source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds
source/tremor source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds
INCLUDES := source source/m68k source/z80 source/sound source/ntsc source/input_hw source/cd_hw source/cart_hw source/cart_hw/svp \
source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds \
source/tremor source/gx source/gx/utils source/gx/gui source/gx/fileio source/gx/images source/gx/sounds \
$(BUILD)
#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
CFLAGS = -O3 -fomit-frame-pointer --param large-function-growth=800 --param inline-unit-growth=200 -Wall -Winline -Wno-strict-aliasing $(MACHDEP) $(INCLUDE) -DUSE_16BPP_RENDERING -DALT_RENDERER -DHW_RVL
CFLAGS = -O3 -fomit-frame-pointer --param large-function-growth=800 --param inline-unit-growth=200 -Wall -Winline -Wno-strict-aliasing $(MACHDEP) $(INCLUDE) -DUSE_LIBTREMOR -DUSE_16BPP_RENDERING -DALT_RENDERER -DHW_RVL
CXXFLAGS = $(CFLAGS)
LDFLAGS = $(MACHDEP) -Wl,-Map,$(notdir $@).map
@ -35,7 +35,7 @@ LDFLAGS = $(MACHDEP) -Wl,-Map,$(notdir $@).map
#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project
#---------------------------------------------------------------------------------
LIBS := -lpng -ldi -lfat -liso9660 -lvorbisidec -lasnd -lwiiuse -lbte -logc -lm -lz
LIBS := -lpng -ldi -lfat -liso9660 -lasnd -lwiiuse -lbte -logc -lm -lz
#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing

386
source/cd_hw/cdd.c
View File

@ -37,6 +37,12 @@
****************************************************************************************/
#include "shared.h"
#ifdef USE_LIBTREMOR
#define SUPPORTED_EXT 20
#else
#define SUPPORTED_EXT 10
#endif
/* BCD conversion lookup tables */
static const uint8 lut_BCD_8[100] =
{
@ -118,8 +124,20 @@ static const unsigned char waveHeader[32] =
};
/* supported WAVE file extensions */
static const char extensions[10][16] =
static const char extensions[SUPPORTED_EXT][16] =
{
#ifdef USE_LIBTREMOR
"%02d.ogg",
" %02d.ogg",
"-%02d.ogg",
"_%02d.ogg",
" - %02d.ogg",
"%d.ogg",
" %d.ogg",
"-%d.ogg",
"_%d.ogg",
" - %d.ogg",
#endif
"%02d.wav",
" %02d.wav",
"-%02d.wav",
@ -212,6 +230,12 @@ int cdd_context_load(uint8 *state)
fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
}
}
#ifdef USE_LIBTREMOR
else if (cdd.toc.tracks[cdd.index].vf.datasource)
{
ov_pcm_seek(&cdd.toc.tracks[cdd.index].vf, (lba - cdd.toc.tracks[cdd.index].start) * 588 - cdd.toc.tracks[cdd.index].offset);
}
#endif
else if (cdd.toc.tracks[cdd.index].fd)
{
/* AUDIO track */
@ -506,8 +530,8 @@ int cdd_load(char *filename, char *header)
fread(id, 4, 1, cdd.toc.tracks[cdd.toc.last].fd);
if (!memcmp(id,"RIFF",4))
{
/* adjust file read offset for current track with WAVE header length */
cdd.toc.tracks[cdd.toc.last].offset -= (ftell(cdd.toc.tracks[cdd.toc.last].fd) + 40);
/* adjust current track file read offset with WAVE header length */
cdd.toc.tracks[cdd.toc.last].offset -= 44;
}
fseek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_SET);
@ -530,7 +554,7 @@ int cdd_load(char *filename, char *header)
fclose(fd);
}
/* ISO+WAV audio tracks auto-detection */
/* .ISO audio tracks auto-detection */
else if (cdd.sectorSize == 2048)
{
int i, offset;
@ -539,7 +563,7 @@ int cdd_load(char *filename, char *header)
ptr = fname + strlen(fname) - 4;
/* auto-detect track file extensions */
for (i=0; i<10; i++)
for (i=0; i<SUPPORTED_EXT; i++)
{
/* auto-detect bad rips with wrong track indexes */
sprintf(ptr, extensions[i], 1);
@ -562,11 +586,13 @@ int cdd_load(char *filename, char *header)
/* repeat until no more valid track files can be found */
while (fd)
{
/* read file HEADER */
unsigned char head[32];
/* make sure this is a valid WAVE file (16-bit stereo @44.1kHz only) */
fseek(fd, 8, SEEK_SET);
fread(head, 32, 1, fd);
fseek(fd, 0, SEEK_SET);
/* check if this is a valid WAVE file (16-bit stereo @44.1kHz only) */
if (!memcmp(head, waveHeader, 32))
{
/* initialize current track file descriptor */
@ -575,7 +601,7 @@ int cdd_load(char *filename, char *header)
/* initialize current track start index with previous track end index */
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
/* add default 2s PAUSE */
/* add default 2s PAUSE between tracks */
cdd.toc.tracks[cdd.toc.last].start += 150;
/* current track end index */
@ -605,9 +631,60 @@ int cdd_load(char *filename, char *header)
/* increment track number */
cdd.toc.last++;
}
#ifdef USE_LIBTREMOR
else if (!ov_open(fd,&cdd.toc.tracks[cdd.toc.last].vf,0,0))
{
/* retrieve stream infos */
vorbis_info *info = ov_info(&cdd.toc.tracks[cdd.toc.last].vf,-1);
if (!info || (info->rate != 44100) || (info->channels != 2))
{
/* unsupported OGG file */
ov_clear(&cdd.toc.tracks[cdd.toc.last].vf);
break;
}
/* initialize current track file descriptor */
cdd.toc.tracks[cdd.toc.last].fd = fd;
/* initialize current track start index with previous track end index */
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
/* add default 2s PAUSE between tracks */
cdd.toc.tracks[cdd.toc.last].start += 150;
/* current track end index */
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ov_pcm_total(&cdd.toc.tracks[cdd.toc.last].vf,-1)/588;
if (cdd.toc.tracks[cdd.toc.last].end <= cdd.toc.tracks[cdd.toc.last].start)
{
/* invalid length */
ov_clear(&cdd.toc.tracks[cdd.toc.last].vf);
cdd.toc.tracks[cdd.toc.last].fd = 0;
cdd.toc.tracks[cdd.toc.last].end = 0;
cdd.toc.tracks[cdd.toc.last].start = 0;
break;
}
/* auto-detect PAUSE within audio files */
ov_pcm_seek(&cdd.toc.tracks[cdd.toc.last].vf, 100 * 588);
ov_read(&cdd.toc.tracks[cdd.toc.last].vf, (char *)head, 32, 0);
if (*(int32 *)head == 0)
{
/* assume 2s PAUSE is included at the beginning of the file */
cdd.toc.tracks[cdd.toc.last].offset -= 150 * 588;
cdd.toc.tracks[cdd.toc.last].end -= 150;
}
ov_pcm_seek(&cdd.toc.tracks[cdd.toc.last].vf, 0);
/* update TOC end */
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
/* increment track number */
cdd.toc.last++;
}
#endif
else
{
/* invalid file type */
/* unsupported audio file format */
fclose(fd);
break;
}
@ -731,15 +808,26 @@ void cdd_unload(void)
/* close CD tracks */
for (i=0; i<cdd.toc.last; i++)
{
if (cdd.toc.tracks[i].fd)
#ifdef USE_LIBTREMOR
if (cdd.toc.tracks[i].vf.datasource)
{
fclose(cdd.toc.tracks[i].fd);
/* detect single file images */
if (cdd.toc.tracks[i+1].fd == cdd.toc.tracks[i].fd)
/* close VORBIS file */
ov_clear(&cdd.toc.tracks[i].vf);
}
else
#endif
{
if (cdd.toc.tracks[i].fd)
{
/* exit loop */
i = cdd.toc.last;
/* close file */
fclose(cdd.toc.tracks[i].fd);
/* detect single file images */
if (cdd.toc.tracks[i+1].fd == cdd.toc.tracks[i].fd)
{
/* exit loop */
i = cdd.toc.last;
}
}
}
}
@ -792,60 +880,117 @@ void cdd_read_audio(unsigned int samples)
/* CD-DA fader volume setup (0-1024) */
int endVol = scd.regs[0x34>>1].w >> 4;
/* use CDD buffer as temporary buffer */
#ifdef LSB_FIRST
int16 *ptr = (int16 *) (cdc.ram);
#else
uint8 *ptr = cdc.ram;
#endif
/* read samples from current block */
fread(cdc.ram, 1, samples * 4, cdd.toc.tracks[cdd.index].fd);
/* process 16-bit (little-endian) stereo samples */
for (i=0; i<samples; i++)
#ifdef USE_LIBTREMOR
if (cdd.toc.tracks[cdd.index].vf.datasource)
{
/* CD-DA fader multiplier (cf. LC7883 datasheet) */
/* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */
mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03);
/* left channel */
#ifdef LSB_FIRST
delta = ((ptr[0] * mul) / 1024) - l;
ptr++;
#else
delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - l;
ptr += 2;
#endif
l += delta;
blip_add_delta_fast(blip[0], i, delta);
/* right channel */
#ifdef LSB_FIRST
delta = ((ptr[0] * mul) / 1024) - r;
ptr++;
#else
delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - r;
ptr += 2;
#endif
r += delta;
blip_add_delta_fast(blip[1], i, delta);
/* update CD-DA fader volume (one step/sample) */
if (curVol < endVol)
int len, done = 0;
int16 *ptr = (int16 *) (cdc.ram);
samples = samples * 4;
while (done < samples)
{
/* fade-in */
curVol++;
len = ov_read(&cdd.toc.tracks[cdd.index].vf, (char *)(cdc.ram + done), samples - done, 0);
if (len <= 0)
{
done = samples;
break;
}
done += len;
}
else if (curVol > endVol)
samples = done / 4;
/* process 16-bit (host-endian) stereo samples */
for (i=0; i<samples; i++)
{
/* fade-out */
curVol--;
/* CD-DA fader multiplier (cf. LC7883 datasheet) */
/* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */
mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03);
/* left channel */
delta = ((ptr[0] * mul) / 1024) - l;
ptr++;
l += delta;
blip_add_delta_fast(blip[0], i, delta);
/* right channel */
delta = ((ptr[0] * mul) / 1024) - r;
ptr++;
r += delta;
blip_add_delta_fast(blip[1], i, delta);
/* update CD-DA fader volume (one step/sample) */
if (curVol < endVol)
{
/* fade-in */
curVol++;
}
else if (curVol > endVol)
{
/* fade-out */
curVol--;
}
else if (!curVol)
{
/* audio will remain muted until next setup */
break;
}
}
else if (!curVol)
}
else
#endif
{
#ifdef LSB_FIRST
int16 *ptr = (int16 *) (cdc.ram);
#else
uint8 *ptr = cdc.ram;
#endif
fread(cdc.ram, 1, samples * 4, cdd.toc.tracks[cdd.index].fd);
/* process 16-bit (little-endian) stereo samples */
for (i=0; i<samples; i++)
{
/* audio will remain muted until next setup */
break;
/* CD-DA fader multiplier (cf. LC7883 datasheet) */
/* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */
mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03);
/* left channel */
#ifdef LSB_FIRST
delta = ((ptr[0] * mul) / 1024) - l;
ptr++;
#else
delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - l;
ptr += 2;
#endif
l += delta;
blip_add_delta_fast(blip[0], i, delta);
/* right channel */
#ifdef LSB_FIRST
delta = ((ptr[0] * mul) / 1024) - r;
ptr++;
#else
delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - r;
ptr += 2;
#endif
r += delta;
blip_add_delta_fast(blip[1], i, delta);
/* update CD-DA fader volume (one step/sample) */
if (curVol < endVol)
{
/* fade-in */
curVol++;
}
else if (curVol > endVol)
{
/* fade-out */
curVol--;
}
else if (!curVol)
{
/* audio will remain muted until next setup */
break;
}
}
}
@ -934,6 +1079,7 @@ void cdd_update(void)
}
else
{
/* end of disc */
cdd.status = CD_END;
return;
}
@ -947,17 +1093,17 @@ void cdd_update(void)
/* PAUSE between tracks */
scd.regs[0x36>>1].byte.h = 0x01;
/* seek to current block */
/* seek to next audio track start */
#ifdef USE_LIBTREMOR
if (cdd.toc.tracks[cdd.index].vf.datasource)
{
ov_pcm_seek(&cdd.toc.tracks[cdd.index].vf, -cdd.toc.tracks[cdd.index].offset);
}
else
#endif
if (cdd.toc.tracks[cdd.index].fd)
{
if (cdd.lba < cdd.toc.tracks[cdd.index].start)
{
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.toc.tracks[cdd.index].start * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
}
else
{
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.lba * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
}
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.toc.tracks[cdd.index].start * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
}
}
}
@ -976,6 +1122,12 @@ void cdd_update(void)
/* skip directly to track start position */
cdd.lba = cdd.toc.tracks[cdd.index].start;
/* AUDIO track playing ? */
if (cdd.status == CD_PLAY)
{
scd.regs[0x36>>1].byte.h = 0x00;
}
}
else if (cdd.lba < cdd.toc.tracks[cdd.index].start)
{
@ -1000,6 +1152,8 @@ void cdd_update(void)
/* end of disc */
cdd.index = cdd.toc.last;
cdd.lba = cdd.toc.end;
cdd.status = CD_END;
return;
}
/* seek to current block */
@ -1008,21 +1162,20 @@ void cdd_update(void)
/* no AUDIO track playing */
scd.regs[0x36>>1].byte.h = 0x01;
/* DATA track */
fseek(cdd.toc.tracks[0].fd, cdd.lba * cdd.sectorSize, SEEK_SET);
}
#ifdef USE_LIBTREMOR
else if (cdd.toc.tracks[cdd.index].vf.datasource)
{
/* VORBIS AUDIO track */
ov_pcm_seek(&cdd.toc.tracks[cdd.index].vf, (cdd.lba - cdd.toc.tracks[cdd.index].start) * 588 - cdd.toc.tracks[cdd.index].offset);
}
#endif
else if (cdd.toc.tracks[cdd.index].fd)
{
/* AUDIO track playing */
scd.regs[0x36>>1].byte.h = 0x00;
if (cdd.lba < cdd.toc.tracks[cdd.index].start)
{
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.toc.tracks[cdd.index].start * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
}
else
{
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.lba * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
}
/* AUDIO track */
fseek(cdd.toc.tracks[cdd.index].fd, (cdd.lba * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET);
}
}
}
@ -1160,7 +1313,7 @@ void cdd_process(void)
/* Radical Rex needs at least one interrupt delay */
/* Wolf Team games (Anet Futatabi, Cobra Command, Road Avenger & Time Gal) need at least 6 interrupts delay */
/* Space Adventure Cobra (2nd morgue scene) needs at least 13 interrupts delay (incl. seek time, so 6 is OK) */
/* Jeopardy & ESPN Sunday Night NFL are picky about this as well: 10 interrupts delay (+ seek time) seems OK */
/* Jeopardy & ESPN Sunday Night NFL are picky about this as well: 10 interrupts delay (+ seek time) seems OK */
cdd.latency = 10;
}
@ -1185,30 +1338,29 @@ void cdd_process(void)
while ((cdd.toc.tracks[index].end <= lba) && (index < cdd.toc.last)) index++;
cdd.index = index;
/* stay within track limits */
if (lba < cdd.toc.tracks[index].start)
{
lba = cdd.toc.tracks[index].start;
}
/* seek to current block */
if (!index)
{
/* seek DATA track */
if (lba < 0)
{
fseek(cdd.toc.tracks[0].fd, 0, SEEK_SET);
}
else
{
fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
}
/* DATA track */
fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
}
#ifdef USE_LIBTREMOR
else if (cdd.toc.tracks[index].vf.datasource)
{
/* VORBIS AUDIO track */
ov_pcm_seek(&cdd.toc.tracks[index].vf, (lba - cdd.toc.tracks[index].start) * 588 - cdd.toc.tracks[cdd.index].offset);
}
#endif
else if (cdd.toc.tracks[index].fd)
{
/* seek AUDIO track */
if (lba < cdd.toc.tracks[index].start)
{
fseek(cdd.toc.tracks[index].fd, (cdd.toc.tracks[index].start * 2352) - cdd.toc.tracks[index].offset, SEEK_SET);
}
else
{
fseek(cdd.toc.tracks[index].fd, (lba * 2352) - cdd.toc.tracks[index].offset, SEEK_SET);
}
/* AUDIO track */
fseek(cdd.toc.tracks[index].fd, (lba * 2352) - cdd.toc.tracks[index].offset, SEEK_SET);
}
/* no audio track playing (yet) */
@ -1217,7 +1369,7 @@ void cdd_process(void)
/* update status */
cdd.status = CD_PLAY;
/* return current track number in RS2-RS3 */
/* return track index in RS2-RS3 */
scd.regs[0x38>>1].w = (CD_PLAY << 8) | 0x02;
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[index + 1] : 0x0A0A;
scd.regs[0x3c>>1].w = 0x0000;
@ -1256,17 +1408,28 @@ void cdd_process(void)
while ((cdd.toc.tracks[index].end <= lba) && (index < cdd.toc.last)) index++;
cdd.index = index;
/* stay within track limits */
if (lba < cdd.toc.tracks[index].start)
{
lba = cdd.toc.tracks[index].start;
}
/* seek to current block */
if (!index)
{
/* DATA track */
if (lba < 0) lba = 0;
fseek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET);
}
#ifdef USE_LIBTREMOR
else if (cdd.toc.tracks[index].vf.datasource)
{
/* VORBIS AUDIO track */
ov_pcm_seek(&cdd.toc.tracks[index].vf, (lba - cdd.toc.tracks[index].start) * 588 - cdd.toc.tracks[cdd.index].offset);
}
#endif
else if (cdd.toc.tracks[index].fd)
{
/* AUDIO track */
if (lba < cdd.toc.tracks[index].start) lba = cdd.toc.tracks[index].start;
fseek(cdd.toc.tracks[index].fd, (lba * 2352) - cdd.toc.tracks[index].offset, SEEK_SET);
}
@ -1276,13 +1439,13 @@ void cdd_process(void)
/* update status */
cdd.status = CD_SEEK;
/* unknown RS1-RS8 values (returning 0xF in RS1 invalidates track infos usually returned in RS2-RS8, which fixes Final Fight CD intro when seek time is emulated) */
scd.regs[0x38>>1].w = (CD_SEEK << 8) | 0x0f;
scd.regs[0x3a>>1].w = 0x0000;
/* return track index in RS2-RS3 (note: returning RS1=0x0f breaks Lunar - The Silver Star) */
scd.regs[0x38>>1].w = (CD_SEEK << 8) | 0x02;
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[index + 1] : 0x0A0A;
scd.regs[0x3c>>1].w = 0x0000;
scd.regs[0x3e>>1].w = 0x0000;
scd.regs[0x40>>1].w = ~(CD_SEEK + 0xf) & 0x0f;
return;
scd.regs[0x40>>1].byte.h = 0x00;
break;
}
case 0x06: /* Pause */
@ -1336,7 +1499,7 @@ void cdd_process(void)
/* update status */
cdd.status = CD_READY;
/* unknown RS0-RS8 values (returning 0xF in RS1 invalidates track infos usually returned in RS2-RS8) */
/* unknown RS0-RS8 values (returning 0xF in RS1 invalidates track infos usually returned in RS2-RS8, also fixes Final Fight CD intro when seek time is emulated) */
scd.regs[0x38>>1].w = (CD_READY << 8) | 0x0f;
scd.regs[0x3a>>1].w = 0x0000;
scd.regs[0x3c>>1].w = 0x0000;
@ -1400,4 +1563,3 @@ void cdd_process(void)
scd.regs[0x3e>>1].byte.h + scd.regs[0x3e>>1].byte.l +
scd.regs[0x40>>1].byte.h) & 0x0f;
}

7
source/cd_hw/cdd.h
View File

@ -40,6 +40,10 @@
#include "blip_buf.h"
#ifdef USE_LIBTREMOR
#include "tremor/ivorbisfile.h"
#endif
#define cdd scd.cdd_hw
/* CDD status */
@ -61,6 +65,9 @@
typedef struct
{
FILE *fd;
#ifdef USE_LIBTREMOR
OggVorbis_File vf;
#endif
int offset;
int start;
int end;

1
source/gx/fileio/file_load.c
View File

@ -213,6 +213,7 @@ int ParseDirectory(void)
/* filter entries */
if ((entry->d_name[0] != '.')
&& strncasecmp(".wav", &entry->d_name[strlen(entry->d_name) - 4], 4)
&& strncasecmp(".ogg", &entry->d_name[strlen(entry->d_name) - 4], 4)
&& strncasecmp(".mp3", &entry->d_name[strlen(entry->d_name) - 4], 4))
{
memset(&filelist[nbfiles], 0, sizeof (FILEENTRIES));

2
source/gx/fileio/file_load.h
View File

@ -40,8 +40,6 @@
#ifndef _FILE_FAT_H
#define _FILE_FAT_H
#define CHUNKSIZE (2048)
/* suppported load devices */
typedef enum
{

19
source/tremor/CHANGELOG Normal file
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@ -0,0 +1,19 @@
*** 20020517: 1.0.2 ***
Playback bugfix to floor1; mode mistakenly used for sizing instead
of blockflag
*** 20020515: 1.0.1 ***
Added complete API documentation to source tarball. No code
changes.
*** 20020412: 1.0.1 ***
Fixed a clipping bug that affected ARM processors; negative
overflows were being properly clipped, but then clobbered to
positive by the positive overflow chec (asm_arm.h:CLIP_TO_15)
*** 20020403: 1.0.0 ***
Initial version

28
source/tremor/COPYING Normal file
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@ -0,0 +1,28 @@
Copyright (c) 2002, Xiph.org Foundation
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

46
source/tremor/README Normal file
View File

@ -0,0 +1,46 @@
This README covers the Ogg Vorbis 'Tremor' integer playback codec
source as of date 2002 09 02, version 1.0.0.
******
The C source in this package will build on any ANSI C compiler and
function completely and properly on any platform. The included build
system assumes GNU build system and make tools (m4, automake,
autoconf, libtool and gmake). GCC is not required, although GCC is
the most tested compiler. To build using GNU tools, type in the
source directory:
./autogen.sh
make
Currently, the source implements playback in pure C on all platforms
except ARM, where a [currently] small amount of assembly (see
asm_arm.h) is used to implement 64 bit math operations and fast LSP
computation. If building on ARM without the benefit of GNU build
system tools, be sure that '_ARM_ASSEM_' is #defined by the build
system if this assembly is desired, else the resulting library will
use whatever 64 bit math builtins the compiler implements.
No math library is required by this source. No floating point
operations are used at any point in either setup or decode. This
decoder library will properly decode any past, current or future
Vorbis I file or stream.
********
The build system produces a static and [when supported by the OS]
dynamic library named 'libvorbisidec'. This library exposes an API
nearly identical to the BSD reference library's 'libvorbisfile',
including all the features familiar to users of vorbisfile. This API
is similar enough that the proper header file to include is named
'ivorbisfile.h' [included in the source build directory]. Lower level
libvorbis-style headers and structures are in 'ivorbiscodec.h'
[included in the source build directory]. A simple example program,
ivorbisfile_example.c, can be built with 'make example'.
********
Detailed Tremor API Documentation begins at doc/index.html
Monty
xiph.org

49
source/tremor/Version_script.in Normal file
View File

@ -0,0 +1,49 @@
#
# Export file for libvorbisidec
#
# Only the symbols listed in the global section will be callable from
# applications linking to libvorbisidec.
#
@PACKAGE@.so.1
{
global:
ov_clear;
ov_open;
ov_open_callbacks;
ov_test;
ov_test_callbacks;
ov_test_open;
ov_bitrate;
ov_bitrate_instant;
ov_streams;
ov_seekable;
ov_serialnumber;
ov_raw_total;
ov_pcm_total;
ov_time_total;
ov_raw_seek;
ov_pcm_seek;
ov_pcm_seek_page;
ov_time_seek;
ov_time_seek_page;
ov_raw_tell;
ov_pcm_tell;
ov_time_tell;
ov_info;
ov_comment;
ov_read;
vorbis_info_init;
vorbis_info_clear;
vorbis_info_blocksize;
vorbis_comment_init;
vorbis_comment_add;
vorbis_comment_add_tag;
vorbis_comment_query;
vorbis_comment_query_count;
vorbis_comment_clear;
local:
*;
};

243
source/tremor/asm_arm.h Normal file
View File

@ -0,0 +1,243 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: arm7 and later wide math functions
********************************************************************/
#ifdef _ARM_ASSEM_
#if !defined(_V_WIDE_MATH) && !defined(_LOW_ACCURACY_)
#define _V_WIDE_MATH
static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
int lo,hi;
asm volatile("smull\t%0, %1, %2, %3"
: "=&r"(lo),"=&r"(hi)
: "%r"(x),"r"(y)
: "cc");
return(hi);
}
static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
return MULT32(x,y)<<1;
}
static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
int lo,hi;
asm volatile("smull %0, %1, %2, %3\n\t"
"movs %0, %0, lsr #15\n\t"
"adc %1, %0, %1, lsl #17\n\t"
: "=&r"(lo),"=&r"(hi)
: "%r"(x),"r"(y)
: "cc");
return(hi);
}
#define MB() asm volatile ("" : : : "memory")
static inline void XPROD32(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
int x1, y1, l;
asm( "smull %0, %1, %4, %6\n\t"
"smlal %0, %1, %5, %7\n\t"
"rsb %3, %4, #0\n\t"
"smull %0, %2, %5, %6\n\t"
"smlal %0, %2, %3, %7"
: "=&r" (l), "=&r" (x1), "=&r" (y1), "=r" (a)
: "3" (a), "r" (b), "r" (t), "r" (v)
: "cc" );
*x = x1;
MB();
*y = y1;
}
static inline void XPROD31(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
int x1, y1, l;
asm( "smull %0, %1, %4, %6\n\t"
"smlal %0, %1, %5, %7\n\t"
"rsb %3, %4, #0\n\t"
"smull %0, %2, %5, %6\n\t"
"smlal %0, %2, %3, %7"
: "=&r" (l), "=&r" (x1), "=&r" (y1), "=r" (a)
: "3" (a), "r" (b), "r" (t), "r" (v)
: "cc" );
*x = x1 << 1;
MB();
*y = y1 << 1;
}
static inline void XNPROD31(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
int x1, y1, l;
asm( "rsb %2, %4, #0\n\t"
"smull %0, %1, %3, %5\n\t"
"smlal %0, %1, %2, %6\n\t"
"smull %0, %2, %4, %5\n\t"
"smlal %0, %2, %3, %6"
: "=&r" (l), "=&r" (x1), "=&r" (y1)
: "r" (a), "r" (b), "r" (t), "r" (v)
: "cc" );
*x = x1 << 1;
MB();
*y = y1 << 1;
}
#endif
#ifndef _V_CLIP_MATH
#define _V_CLIP_MATH
static inline ogg_int32_t CLIP_TO_15(ogg_int32_t x) {
int tmp;
asm volatile("subs %1, %0, #32768\n\t"
"movpl %0, #0x7f00\n\t"
"orrpl %0, %0, #0xff\n"
"adds %1, %0, #32768\n\t"
"movmi %0, #0x8000"
: "+r"(x),"=r"(tmp)
:
: "cc");
return(x);
}
#endif
#ifndef _V_LSP_MATH_ASM
#define _V_LSP_MATH_ASM
static inline void lsp_loop_asm(ogg_uint32_t *qip,ogg_uint32_t *pip,
ogg_int32_t *qexpp,
ogg_int32_t *ilsp,ogg_int32_t wi,
ogg_int32_t m){
ogg_uint32_t qi=*qip,pi=*pip;
ogg_int32_t qexp=*qexpp;
asm("mov r0,%3;"
"mov r1,%5,asr#1;"
"add r0,r0,r1,lsl#3;"
"1:"
"ldmdb r0!,{r1,r3};"
"subs r1,r1,%4;" //ilsp[j]-wi
"rsbmi r1,r1,#0;" //labs(ilsp[j]-wi)
"umull %0,r2,r1,%0;" //qi*=labs(ilsp[j]-wi)
"subs r1,r3,%4;" //ilsp[j+1]-wi
"rsbmi r1,r1,#0;" //labs(ilsp[j+1]-wi)
"umull %1,r3,r1,%1;" //pi*=labs(ilsp[j+1]-wi)
"cmn r2,r3;" // shift down 16?
"beq 0f;"
"add %2,%2,#16;"
"mov %0,%0,lsr #16;"
"orr %0,%0,r2,lsl #16;"
"mov %1,%1,lsr #16;"
"orr %1,%1,r3,lsl #16;"
"0:"
"cmp r0,%3;\n"
"bhi 1b;\n"
// odd filter assymetry
"ands r0,%5,#1;\n"
"beq 2f;\n"
"add r0,%3,%5,lsl#2;\n"
"ldr r1,[r0,#-4];\n"
"mov r0,#0x4000;\n"
"subs r1,r1,%4;\n" //ilsp[j]-wi
"rsbmi r1,r1,#0;\n" //labs(ilsp[j]-wi)
"umull %0,r2,r1,%0;\n" //qi*=labs(ilsp[j]-wi)
"umull %1,r3,r0,%1;\n" //pi*=labs(ilsp[j+1]-wi)
"cmn r2,r3;\n" // shift down 16?
"beq 2f;\n"
"add %2,%2,#16;\n"
"mov %0,%0,lsr #16;\n"
"orr %0,%0,r2,lsl #16;\n"
"mov %1,%1,lsr #16;\n"
"orr %1,%1,r3,lsl #16;\n"
//qi=(pi>>shift)*labs(ilsp[j]-wi);
//pi=(qi>>shift)*labs(ilsp[j+1]-wi);
//qexp+=shift;
//}
/* normalize to max 16 sig figs */
"2:"
"mov r2,#0;"
"orr r1,%0,%1;"
"tst r1,#0xff000000;"
"addne r2,r2,#8;"
"movne r1,r1,lsr #8;"
"tst r1,#0x00f00000;"
"addne r2,r2,#4;"
"movne r1,r1,lsr #4;"
"tst r1,#0x000c0000;"
"addne r2,r2,#2;"
"movne r1,r1,lsr #2;"
"tst r1,#0x00020000;"
"addne r2,r2,#1;"
"movne r1,r1,lsr #1;"
"tst r1,#0x00010000;"
"addne r2,r2,#1;"
"mov %0,%0,lsr r2;"
"mov %1,%1,lsr r2;"
"add %2,%2,r2;"
: "+r"(qi),"+r"(pi),"+r"(qexp)
: "r"(ilsp),"r"(wi),"r"(m)
: "r0","r1","r2","r3","cc");
*qip=qi;
*pip=pi;
*qexpp=qexp;
}
static inline void lsp_norm_asm(ogg_uint32_t *qip,ogg_int32_t *qexpp){
ogg_uint32_t qi=*qip;
ogg_int32_t qexp=*qexpp;
asm("tst %0,#0x0000ff00;"
"moveq %0,%0,lsl #8;"
"subeq %1,%1,#8;"
"tst %0,#0x0000f000;"
"moveq %0,%0,lsl #4;"
"subeq %1,%1,#4;"
"tst %0,#0x0000c000;"
"moveq %0,%0,lsl #2;"
"subeq %1,%1,#2;"
"tst %0,#0x00008000;"
"moveq %0,%0,lsl #1;"
"subeq %1,%1,#1;"
: "+r"(qi),"+r"(qexp)
:
: "cc");
*qip=qi;
*qexpp=qexp;
}
#endif
#endif

130
source/tremor/backends.h Normal file
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@ -0,0 +1,130 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: backend and mapping structures
********************************************************************/
/* this is exposed up here because we need it for static modes.
Lookups for each backend aren't exposed because there's no reason
to do so */
#ifndef _vorbis_backend_h_
#define _vorbis_backend_h_
#include "codec_internal.h"
/* this would all be simpler/shorter with templates, but.... */
/* Transform backend generic *************************************/
/* only mdct right now. Flesh it out more if we ever transcend mdct
in the transform domain */
/* Floor backend generic *****************************************/
typedef struct{
vorbis_info_floor *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_floor *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_floor *);
void (*free_info) (vorbis_info_floor *);
void (*free_look) (vorbis_look_floor *);
void *(*inverse1) (struct vorbis_block *,vorbis_look_floor *);
int (*inverse2) (struct vorbis_block *,vorbis_look_floor *,
void *buffer,ogg_int32_t *);
} vorbis_func_floor;
typedef struct{
int order;
long rate;
long barkmap;
int ampbits;
int ampdB;
int numbooks; /* <= 16 */
int books[16];
} vorbis_info_floor0;
#define VIF_POSIT 63
#define VIF_CLASS 16
#define VIF_PARTS 31
typedef struct{
int partitions; /* 0 to 31 */
int partitionclass[VIF_PARTS]; /* 0 to 15 */
int class_dim[VIF_CLASS]; /* 1 to 8 */
int class_subs[VIF_CLASS]; /* 0,1,2,3 (bits: 1<<n poss) */
int class_book[VIF_CLASS]; /* subs ^ dim entries */
int class_subbook[VIF_CLASS][8]; /* [VIF_CLASS][subs] */
int mult; /* 1 2 3 or 4 */
int postlist[VIF_POSIT+2]; /* first two implicit */
} vorbis_info_floor1;
/* Residue backend generic *****************************************/
typedef struct{
vorbis_info_residue *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_residue *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_residue *);
void (*free_info) (vorbis_info_residue *);
void (*free_look) (vorbis_look_residue *);
int (*inverse) (struct vorbis_block *,vorbis_look_residue *,
ogg_int32_t **,int *,int);
} vorbis_func_residue;
typedef struct vorbis_info_residue0{
/* block-partitioned VQ coded straight residue */
long begin;
long end;
/* first stage (lossless partitioning) */
int grouping; /* group n vectors per partition */
int partitions; /* possible codebooks for a partition */
int groupbook; /* huffbook for partitioning */
int secondstages[64]; /* expanded out to pointers in lookup */
int booklist[256]; /* list of second stage books */
} vorbis_info_residue0;
/* Mapping backend generic *****************************************/
typedef struct{
vorbis_info_mapping *(*unpack)(vorbis_info *,oggpack_buffer *);
vorbis_look_mapping *(*look) (vorbis_dsp_state *,vorbis_info_mode *,
vorbis_info_mapping *);
void (*free_info) (vorbis_info_mapping *);
void (*free_look) (vorbis_look_mapping *);
int (*inverse) (struct vorbis_block *vb,vorbis_look_mapping *);
} vorbis_func_mapping;
typedef struct vorbis_info_mapping0{
int submaps; /* <= 16 */
int chmuxlist[256]; /* up to 256 channels in a Vorbis stream */
int floorsubmap[16]; /* [mux] submap to floors */
int residuesubmap[16]; /* [mux] submap to residue */
int psy[2]; /* by blocktype; impulse/padding for short,
transition/normal for long */
int coupling_steps;
int coupling_mag[256];
int coupling_ang[256];
} vorbis_info_mapping0;
#endif

265
source/tremor/bitwise.c Normal file
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@ -0,0 +1,265 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: packing variable sized words into an octet stream
********************************************************************/
/* We're 'LSb' endian; if we write a word but read individual bits,
then we'll read the lsb first */
#include <string.h>
#include <stdlib.h>
#include "ogg.h"
static unsigned long mask[]=
{0x00000000,0x00000001,0x00000003,0x00000007,0x0000000f,
0x0000001f,0x0000003f,0x0000007f,0x000000ff,0x000001ff,
0x000003ff,0x000007ff,0x00000fff,0x00001fff,0x00003fff,
0x00007fff,0x0000ffff,0x0001ffff,0x0003ffff,0x0007ffff,
0x000fffff,0x001fffff,0x003fffff,0x007fffff,0x00ffffff,
0x01ffffff,0x03ffffff,0x07ffffff,0x0fffffff,0x1fffffff,
0x3fffffff,0x7fffffff,0xffffffff };
/* mark read process as having run off the end */
static void _adv_halt(oggpack_buffer *b){
b->headptr=b->head->buffer->data+b->head->begin+b->head->length;
b->headend=-1;
b->headbit=0;
}
/* spans forward, skipping as many bytes as headend is negative; if
headend is zero, simply finds next byte. If we're up to the end
of the buffer, leaves headend at zero. If we've read past the end,
halt the decode process. */
static void _span(oggpack_buffer *b){
while(b->headend<1){
if(b->head->next){
b->count+=b->head->length;
b->head=b->head->next;
b->headptr=b->head->buffer->data+b->head->begin-b->headend;
b->headend+=b->head->length;
}else{
/* we've either met the end of decode, or gone past it. halt
only if we're past */
if(b->headend<0 || b->headbit)
/* read has fallen off the end */
_adv_halt(b);
break;
}
}
}
void oggpack_readinit(oggpack_buffer *b,ogg_reference *r){
memset(b,0,sizeof(*b));
b->tail=b->head=r;
b->count=0;
b->headptr=b->head->buffer->data+b->head->begin;
b->headend=b->head->length;
_span(b);
}
#define _lookspan() while(!end){\
head=head->next;\
if(!head) return -1;\
ptr=head->buffer->data + head->begin;\
end=head->length;\
}
/* Read in bits without advancing the bitptr; bits <= 32 */
long oggpack_look(oggpack_buffer *b,int bits){
unsigned long m=mask[bits];
unsigned long ret=-1;
bits+=b->headbit;
if(bits >= b->headend<<3){
int end=b->headend;
unsigned char *ptr=b->headptr;
ogg_reference *head=b->head;
if(end<0)return -1;
if(bits){
_lookspan();
ret=*ptr++>>b->headbit;
if(bits>8){
--end;
_lookspan();
ret|=*ptr++<<(8-b->headbit);
if(bits>16){
--end;
_lookspan();
ret|=*ptr++<<(16-b->headbit);
if(bits>24){
--end;
_lookspan();
ret|=*ptr++<<(24-b->headbit);
if(bits>32 && b->headbit){
--end;
_lookspan();
ret|=*ptr<<(32-b->headbit);
}
}
}
}
}
}else{
/* make this a switch jump-table */
ret=b->headptr[0]>>b->headbit;
if(bits>8){
ret|=b->headptr[1]<<(8-b->headbit);
if(bits>16){
ret|=b->headptr[2]<<(16-b->headbit);
if(bits>24){
ret|=b->headptr[3]<<(24-b->headbit);
if(bits>32 && b->headbit)
ret|=b->headptr[4]<<(32-b->headbit);
}
}
}
}
ret&=m;
return ret;
}
/* limited to 32 at a time */
void oggpack_adv(oggpack_buffer *b,int bits){
bits+=b->headbit;
b->headbit=bits&7;
b->headptr+=bits/8;
if((b->headend-=bits/8)<1)_span(b);
}
/* spans forward and finds next byte. Never halts */
static void _span_one(oggpack_buffer *b){
while(b->headend<1){
if(b->head->next){
b->count+=b->head->length;
b->head=b->head->next;
b->headptr=b->head->buffer->data+b->head->begin;
b->headend=b->head->length;
}else
break;
}
}
static int _halt_one(oggpack_buffer *b){
if(b->headend<1){
_adv_halt(b);
return -1;
}
return 0;
}
int oggpack_eop(oggpack_buffer *b){
if(b->headend<0)return -1;
return 0;
}
/* bits <= 32 */
long oggpack_read(oggpack_buffer *b,int bits){
unsigned long m=mask[bits];
ogg_uint32_t ret=-1;
bits+=b->headbit;
if(bits >= b->headend<<3){
if(b->headend<0)return -1;
if(bits){
if (_halt_one(b)) return -1;
ret=*b->headptr>>b->headbit;
if(bits>=8){
++b->headptr;
--b->headend;
_span_one(b);
if(bits>8){
if (_halt_one(b)) return -1;
ret|=*b->headptr<<(8-b->headbit);
if(bits>=16){
++b->headptr;
--b->headend;
_span_one(b);
if(bits>16){
if (_halt_one(b)) return -1;
ret|=*b->headptr<<(16-b->headbit);
if(bits>=24){
++b->headptr;
--b->headend;
_span_one(b);
if(bits>24){
if (_halt_one(b)) return -1;
ret|=*b->headptr<<(24-b->headbit);
if(bits>=32){
++b->headptr;
--b->headend;
_span_one(b);
if(bits>32){
if (_halt_one(b)) return -1;
if(b->headbit)ret|=*b->headptr<<(32-b->headbit);
}
}
}
}
}
}
}
}
}
}else{
ret=b->headptr[0]>>b->headbit;
if(bits>8){
ret|=b->headptr[1]<<(8-b->headbit);
if(bits>16){
ret|=b->headptr[2]<<(16-b->headbit);
if(bits>24){
ret|=b->headptr[3]<<(24-b->headbit);
if(bits>32 && b->headbit){
ret|=b->headptr[4]<<(32-b->headbit);
}
}
}
}
b->headptr+=bits/8;
b->headend-=bits/8;
}
ret&=m;
b->headbit=bits&7;
return ret;
}
long oggpack_bytes(oggpack_buffer *b){
return(b->count+b->headptr-b->head->buffer->data-b->head->begin+
(b->headbit+7)/8);
}
long oggpack_bits(oggpack_buffer *b){
return((b->count+b->headptr-b->head->buffer->data-b->head->begin)*8+
b->headbit);
}

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: PCM data vector blocking, windowing and dis/reassembly
********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "window.h"
#include "registry.h"
#include "misc.h"
static int ilog(unsigned int v){
int ret=0;
if(v)--v;
while(v){
ret++;
v>>=1;
}
return(ret);
}
/* pcm accumulator examples (not exhaustive):
<-------------- lW ---------------->
<--------------- W ---------------->
: .....|..... _______________ |
: .''' | '''_--- | |\ |
:.....''' |_____--- '''......| | \_______|
:.................|__________________|_______|__|______|
|<------ Sl ------>| > Sr < |endW
|beginSl |endSl | |endSr
|beginW |endlW |beginSr
|< lW >|
<--------------- W ---------------->
| | .. ______________ |
| | ' `/ | ---_ |
|___.'___/`. | ---_____|
|_______|__|_______|_________________|
| >|Sl|< |<------ Sr ----->|endW
| | |endSl |beginSr |endSr
|beginW | |endlW
mult[0] |beginSl mult[n]
<-------------- lW ----------------->
|<--W-->|
: .............. ___ | |
: .''' |`/ \ | |
:.....''' |/`....\|...|
:.........................|___|___|___|
|Sl |Sr |endW
| | |endSr
| |beginSr
| |endSl
|beginSl
|beginW
*/
/* block abstraction setup *********************************************/
#ifndef WORD_ALIGN
#define WORD_ALIGN 8
#endif
int vorbis_block_init(vorbis_dsp_state *v, vorbis_block *vb){
memset(vb,0,sizeof(*vb));
vb->vd=v;
vb->localalloc=0;
vb->localstore=NULL;
return(0);
}
void *_vorbis_block_alloc(vorbis_block *vb,long bytes){
bytes=(bytes+(WORD_ALIGN-1)) & ~(WORD_ALIGN-1);
if(bytes+vb->localtop>vb->localalloc){
/* can't just _ogg_realloc... there are outstanding pointers */
if(vb->localstore){
struct alloc_chain *link=(struct alloc_chain *)_ogg_malloc(sizeof(*link));
vb->totaluse+=vb->localtop;
link->next=vb->reap;
link->ptr=vb->localstore;
vb->reap=link;
}
/* highly conservative */
vb->localalloc=bytes;
vb->localstore=_ogg_malloc(vb->localalloc);
vb->localtop=0;
}
{
void *ret=(void *)(((char *)vb->localstore)+vb->localtop);
vb->localtop+=bytes;
return ret;
}
}
/* reap the chain, pull the ripcord */
void _vorbis_block_ripcord(vorbis_block *vb){
/* reap the chain */
struct alloc_chain *reap=vb->reap;
while(reap){
struct alloc_chain *next=reap->next;
_ogg_free(reap->ptr);
memset(reap,0,sizeof(*reap));
_ogg_free(reap);
reap=next;
}
/* consolidate storage */
if(vb->totaluse){
vb->localstore=_ogg_realloc(vb->localstore,vb->totaluse+vb->localalloc);
vb->localalloc+=vb->totaluse;
vb->totaluse=0;
}
/* pull the ripcord */
vb->localtop=0;
vb->reap=NULL;
}
int vorbis_block_clear(vorbis_block *vb){
_vorbis_block_ripcord(vb);
if(vb->localstore)_ogg_free(vb->localstore);
memset(vb,0,sizeof(*vb));
return(0);
}
static int _vds_init(vorbis_dsp_state *v,vorbis_info *vi){
int i;
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
private_state *b=NULL;
memset(v,0,sizeof(*v));
b=(private_state *)(v->backend_state=_ogg_calloc(1,sizeof(*b)));
v->vi=vi;
b->modebits=ilog(ci->modes);
/* Vorbis I uses only window type 0 */
b->window[0]=_vorbis_window(0,ci->blocksizes[0]/2);
b->window[1]=_vorbis_window(0,ci->blocksizes[1]/2);
/* finish the codebooks */
if(!ci->fullbooks){
ci->fullbooks=(codebook *)_ogg_calloc(ci->books,sizeof(*ci->fullbooks));
for(i=0;i<ci->books;i++){
vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i]);
/* decode codebooks are now standalone after init */
vorbis_staticbook_destroy(ci->book_param[i]);
ci->book_param[i]=NULL;
}
}
v->pcm_storage=ci->blocksizes[1];
v->pcm=(ogg_int32_t **)_ogg_malloc(vi->channels*sizeof(*v->pcm));
v->pcmret=(ogg_int32_t **)_ogg_malloc(vi->channels*sizeof(*v->pcmret));
for(i=0;i<vi->channels;i++)
v->pcm[i]=(ogg_int32_t *)_ogg_calloc(v->pcm_storage,sizeof(*v->pcm[i]));
/* all 1 (large block) or 0 (small block) */
/* explicitly set for the sake of clarity */
v->lW=0; /* previous window size */
v->W=0; /* current window size */
/* initialize all the mapping/backend lookups */
b->mode=(vorbis_look_mapping **)_ogg_calloc(ci->modes,sizeof(*b->mode));
for(i=0;i<ci->modes;i++){
int mapnum=ci->mode_param[i]->mapping;
int maptype=ci->map_type[mapnum];
b->mode[i]=_mapping_P[maptype]->look(v,ci->mode_param[i],
ci->map_param[mapnum]);
}
return(0);
}
int vorbis_synthesis_restart(vorbis_dsp_state *v){
vorbis_info *vi=v->vi;
codec_setup_info *ci;
if(!v->backend_state)return -1;
if(!vi)return -1;
ci=vi->codec_setup;
if(!ci)return -1;
v->centerW=ci->blocksizes[1]/2;
v->pcm_current=v->centerW;
v->pcm_returned=-1;
v->granulepos=-1;
v->sequence=-1;
((private_state *)(v->backend_state))->sample_count=-1;
return(0);
}
int vorbis_synthesis_init(vorbis_dsp_state *v,vorbis_info *vi){
_vds_init(v,vi);
vorbis_synthesis_restart(v);
return(0);
}
void vorbis_dsp_clear(vorbis_dsp_state *v){
int i;
if(v){
vorbis_info *vi=v->vi;
codec_setup_info *ci=(codec_setup_info *)(vi?vi->codec_setup:NULL);
private_state *b=(private_state *)v->backend_state;
if(v->pcm){
for(i=0;i<vi->channels;i++)
if(v->pcm[i])_ogg_free(v->pcm[i]);
_ogg_free(v->pcm);
if(v->pcmret)_ogg_free(v->pcmret);
}
/* free mode lookups; these are actually vorbis_look_mapping structs */
if(ci){
for(i=0;i<ci->modes;i++){
int mapnum=ci->mode_param[i]->mapping;
int maptype=ci->map_type[mapnum];
if(b && b->mode)_mapping_P[maptype]->free_look(b->mode[i]);
}
}
if(b){
if(b->mode)_ogg_free(b->mode);
_ogg_free(b);
}
memset(v,0,sizeof(*v));
}
}
/* Unlike in analysis, the window is only partially applied for each
block. The time domain envelope is not yet handled at the point of
calling (as it relies on the previous block). */
int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb){
vorbis_info *vi=v->vi;
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
private_state *b=v->backend_state;
int i,j;
if(v->pcm_current>v->pcm_returned && v->pcm_returned!=-1)return(OV_EINVAL);
v->lW=v->W;
v->W=vb->W;
v->nW=-1;
if((v->sequence==-1)||
(v->sequence+1 != vb->sequence)){
v->granulepos=-1; /* out of sequence; lose count */
b->sample_count=-1;
}
v->sequence=vb->sequence;
if(vb->pcm){ /* no pcm to process if vorbis_synthesis_trackonly
was called on block */
int n=ci->blocksizes[v->W]/2;
int n0=ci->blocksizes[0]/2;
int n1=ci->blocksizes[1]/2;
int thisCenter;
int prevCenter;
if(v->centerW){
thisCenter=n1;
prevCenter=0;
}else{
thisCenter=0;
prevCenter=n1;
}
/* v->pcm is now used like a two-stage double buffer. We don't want
to have to constantly shift *or* adjust memory usage. Don't
accept a new block until the old is shifted out */
/* overlap/add PCM */
for(j=0;j<vi->channels;j++){
/* the overlap/add section */
if(v->lW){
if(v->W){
/* large/large */
ogg_int32_t *pcm=v->pcm[j]+prevCenter;
ogg_int32_t *p=vb->pcm[j];
for(i=0;i<n1;i++)
pcm[i]+=p[i];
}else{
/* large/small */
ogg_int32_t *pcm=v->pcm[j]+prevCenter+n1/2-n0/2;
ogg_int32_t *p=vb->pcm[j];
for(i=0;i<n0;i++)
pcm[i]+=p[i];
}
}else{
if(v->W){
/* small/large */
ogg_int32_t *pcm=v->pcm[j]+prevCenter;
ogg_int32_t *p=vb->pcm[j]+n1/2-n0/2;
for(i=0;i<n0;i++)
pcm[i]+=p[i];
for(;i<n1/2+n0/2;i++)
pcm[i]=p[i];
}else{
/* small/small */
ogg_int32_t *pcm=v->pcm[j]+prevCenter;
ogg_int32_t *p=vb->pcm[j];
for(i=0;i<n0;i++)
pcm[i]+=p[i];
}
}
/* the copy section */
{
ogg_int32_t *pcm=v->pcm[j]+thisCenter;
ogg_int32_t *p=vb->pcm[j]+n;
for(i=0;i<n;i++)
pcm[i]=p[i];
}
}
if(v->centerW)
v->centerW=0;
else
v->centerW=n1;
/* deal with initial packet state; we do this using the explicit
pcm_returned==-1 flag otherwise we're sensitive to first block
being short or long */
if(v->pcm_returned==-1){
v->pcm_returned=thisCenter;
v->pcm_current=thisCenter;
}else{
v->pcm_returned=prevCenter;
v->pcm_current=prevCenter+
ci->blocksizes[v->lW]/4+
ci->blocksizes[v->W]/4;
}
}
/* track the frame number... This is for convenience, but also
making sure our last packet doesn't end with added padding. If
the last packet is partial, the number of samples we'll have to
return will be past the vb->granulepos.
This is not foolproof! It will be confused if we begin
decoding at the last page after a seek or hole. In that case,
we don't have a starting point to judge where the last frame
is. For this reason, vorbisfile will always try to make sure
it reads the last two marked pages in proper sequence */
if(b->sample_count==-1){
b->sample_count=0;
}else{
b->sample_count+=ci->blocksizes[v->lW]/4+ci->blocksizes[v->W]/4;
}
if(v->granulepos==-1){
if(vb->granulepos!=-1){ /* only set if we have a position to set to */
v->granulepos=vb->granulepos;
/* is this a short page? */
if(b->sample_count>v->granulepos){
/* corner case; if this is both the first and last audio page,
then spec says the end is cut, not beginning */
if(vb->eofflag){
/* trim the end */
/* no preceeding granulepos; assume we started at zero (we'd
have to in a short single-page stream) */
/* granulepos could be -1 due to a seek, but that would result
in a long coun`t, not short count */
v->pcm_current-=(b->sample_count-v->granulepos);
}else{
/* trim the beginning */
v->pcm_returned+=(b->sample_count-v->granulepos);
if(v->pcm_returned>v->pcm_current)
v->pcm_returned=v->pcm_current;
}
}
}
}else{
v->granulepos+=ci->blocksizes[v->lW]/4+ci->blocksizes[v->W]/4;
if(vb->granulepos!=-1 && v->granulepos!=vb->granulepos){
if(v->granulepos>vb->granulepos){
long extra=v->granulepos-vb->granulepos;
if(extra)
if(vb->eofflag){
/* partial last frame. Strip the extra samples off */
v->pcm_current-=extra;
} /* else {Shouldn't happen *unless* the bitstream is out of
spec. Either way, believe the bitstream } */
} /* else {Shouldn't happen *unless* the bitstream is out of
spec. Either way, believe the bitstream } */
v->granulepos=vb->granulepos;
}
}
/* Update, cleanup */
if(vb->eofflag)v->eofflag=1;
return(0);
}
/* pcm==NULL indicates we just want the pending samples, no more */
int vorbis_synthesis_pcmout(vorbis_dsp_state *v,ogg_int32_t ***pcm){
vorbis_info *vi=v->vi;
if(v->pcm_returned>-1 && v->pcm_returned<v->pcm_current){
if(pcm){
int i;
for(i=0;i<vi->channels;i++)
v->pcmret[i]=v->pcm[i]+v->pcm_returned;
*pcm=v->pcmret;
}
return(v->pcm_current-v->pcm_returned);
}
return(0);
}
int vorbis_synthesis_read(vorbis_dsp_state *v,int bytes){
if(bytes && v->pcm_returned+bytes>v->pcm_current)return(OV_EINVAL);
v->pcm_returned+=bytes;
return(0);
}

24
source/tremor/block.h Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2008 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: shared block functions
********************************************************************/
#ifndef _V_BLOCK_
#define _V_BLOCK_
extern void _vorbis_block_ripcord(vorbis_block *vb);
extern void *_vorbis_block_alloc(vorbis_block *vb,long bytes);
#endif

371
source/tremor/codebook.c Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: basic codebook pack/unpack/code/decode operations
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codebook.h"
#include "misc.h"
/* unpacks a codebook from the packet buffer into the codebook struct,
readies the codebook auxiliary structures for decode *************/
int vorbis_staticbook_unpack(oggpack_buffer *opb,static_codebook *s){
long i,j;
memset(s,0,sizeof(*s));
/* make sure alignment is correct */
if(oggpack_read(opb,24)!=0x564342)goto _eofout;
/* first the basic parameters */
s->dim=oggpack_read(opb,16);
s->entries=oggpack_read(opb,24);
if(s->entries==-1)goto _eofout;
/* codeword ordering.... length ordered or unordered? */
switch((int)oggpack_read(opb,1)){
case 0:
/* unordered */
s->lengthlist=(long *)_ogg_malloc(sizeof(*s->lengthlist)*s->entries);
/* allocated but unused entries? */
if(oggpack_read(opb,1)){
/* yes, unused entries */
for(i=0;i<s->entries;i++){
if(oggpack_read(opb,1)){
long num=oggpack_read(opb,5);
if(num==-1)goto _eofout;
s->lengthlist[i]=num+1;
}else
s->lengthlist[i]=0;
}
}else{
/* all entries used; no tagging */
for(i=0;i<s->entries;i++){
long num=oggpack_read(opb,5);
if(num==-1)goto _eofout;
s->lengthlist[i]=num+1;
}
}
break;
case 1:
/* ordered */
{
long length=oggpack_read(opb,5)+1;
s->lengthlist=(long *)_ogg_malloc(sizeof(*s->lengthlist)*s->entries);
for(i=0;i<s->entries;){
long num=oggpack_read(opb,_ilog(s->entries-i));
if(num==-1)goto _eofout;
for(j=0;j<num && i<s->entries;j++,i++)
s->lengthlist[i]=length;
length++;
}
}
break;
default:
/* EOF */
return(-1);
}
/* Do we have a mapping to unpack? */
switch((s->maptype=oggpack_read(opb,4))){
case 0:
/* no mapping */
break;
case 1: case 2:
/* implicitly populated value mapping */
/* explicitly populated value mapping */
s->q_min=oggpack_read(opb,32);
s->q_delta=oggpack_read(opb,32);
s->q_quant=oggpack_read(opb,4)+1;
s->q_sequencep=oggpack_read(opb,1);
{
int quantvals=0;
switch(s->maptype){
case 1:
quantvals=_book_maptype1_quantvals(s);
break;
case 2:
quantvals=s->entries*s->dim;
break;
}
/* quantized values */
s->quantlist=(long *)_ogg_malloc(sizeof(*s->quantlist)*quantvals);
for(i=0;i<quantvals;i++)
s->quantlist[i]=oggpack_read(opb,s->q_quant);
if(quantvals&&s->quantlist[quantvals-1]==-1)goto _eofout;
}
break;
default:
goto _errout;
}
/* all set */
return(0);
_errout:
_eofout:
vorbis_staticbook_clear(s);
return(-1);
}
/* the 'eliminate the decode tree' optimization actually requires the
codewords to be MSb first, not LSb. This is an annoying inelegancy
(and one of the first places where carefully thought out design
turned out to be wrong; Vorbis II and future Ogg codecs should go
to an MSb bitpacker), but not actually the huge hit it appears to
be. The first-stage decode table catches most words so that
bitreverse is not in the main execution path. */
static ogg_uint32_t bitreverse(ogg_uint32_t x){
x= ((x>>16)&0x0000ffff) | ((x<<16)&0xffff0000);
x= ((x>> 8)&0x00ff00ff) | ((x<< 8)&0xff00ff00);
x= ((x>> 4)&0x0f0f0f0f) | ((x<< 4)&0xf0f0f0f0);
x= ((x>> 2)&0x33333333) | ((x<< 2)&0xcccccccc);
return((x>> 1)&0x55555555) | ((x<< 1)&0xaaaaaaaa);
}
STIN long decode_packed_entry_number(codebook *book,
oggpack_buffer *b){
int read=book->dec_maxlength;
long lo,hi;
long lok = oggpack_look(b,book->dec_firsttablen);
if (lok >= 0) {
long entry = book->dec_firsttable[lok];
if(entry&0x80000000UL){
lo=(entry>>15)&0x7fff;
hi=book->used_entries-(entry&0x7fff);
}else{
oggpack_adv(b, book->dec_codelengths[entry-1]);
return(entry-1);
}
}else{
lo=0;
hi=book->used_entries;
}
lok = oggpack_look(b, read);
while(lok<0 && read>1)
lok = oggpack_look(b, --read);
if(lok<0){
oggpack_adv(b,1); /* force eop */
return -1;
}
/* bisect search for the codeword in the ordered list */
{
ogg_uint32_t testword=bitreverse((ogg_uint32_t)lok);
while(hi-lo>1){
long p=(hi-lo)>>1;
long test=book->codelist[lo+p]>testword;
lo+=p&(test-1);
hi-=p&(-test);
}
if(book->dec_codelengths[lo]<=read){
oggpack_adv(b, book->dec_codelengths[lo]);
return(lo);
}
}
oggpack_adv(b, read+1);
return(-1);
}
/* Decode side is specced and easier, because we don't need to find
matches using different criteria; we simply read and map. There are
two things we need to do 'depending':
We may need to support interleave. We don't really, but it's
convenient to do it here rather than rebuild the vector later.
Cascades may be additive or multiplicitive; this is not inherent in
the codebook, but set in the code using the codebook. Like
interleaving, it's easiest to do it here.
addmul==0 -> declarative (set the value)
addmul==1 -> additive
addmul==2 -> multiplicitive */
/* returns the [original, not compacted] entry number or -1 on eof *********/
long vorbis_book_decode(codebook *book, oggpack_buffer *b){
if(book->used_entries>0){
long packed_entry=decode_packed_entry_number(book,b);
if(packed_entry>=0)
return(book->dec_index[packed_entry]);
}
/* if there's no dec_index, the codebook unpacking isn't collapsed */
return(-1);
}
/* returns 0 on OK or -1 on eof *************************************/
long vorbis_book_decodevs_add(codebook *book,ogg_int32_t *a,
oggpack_buffer *b,int n,int point){
if(book->used_entries>0){
int step=n/book->dim;
long *entry = (long *)alloca(sizeof(*entry)*step);
ogg_int32_t **t = (ogg_int32_t **)alloca(sizeof(*t)*step);
int i,j,o;
int shift=point-book->binarypoint;
if(shift>=0){
for (i = 0; i < step; i++) {
entry[i]=decode_packed_entry_number(book,b);
if(entry[i]==-1)return(-1);
t[i] = book->valuelist+entry[i]*book->dim;
}
for(i=0,o=0;i<book->dim;i++,o+=step)
for (j=0;j<step;j++)
a[o+j]+=t[j][i]>>shift;
}else{
for (i = 0; i < step; i++) {
entry[i]=decode_packed_entry_number(book,b);
if(entry[i]==-1)return(-1);
t[i] = book->valuelist+entry[i]*book->dim;
}
for(i=0,o=0;i<book->dim;i++,o+=step)
for (j=0;j<step;j++)
a[o+j]+=t[j][i]<<-shift;
}
}
return(0);
}
long vorbis_book_decodev_add(codebook *book,ogg_int32_t *a,
oggpack_buffer *b,int n,int point){
if(book->used_entries>0){
int i,j,entry;
ogg_int32_t *t;
int shift=point-book->binarypoint;
if(shift>=0){
for(i=0;i<n;){
entry = decode_packed_entry_number(book,b);
if(entry==-1)return(-1);
t = book->valuelist+entry*book->dim;
for (j=0;j<book->dim;)
a[i++]+=t[j++]>>shift;
}
}else{
for(i=0;i<n;){
entry = decode_packed_entry_number(book,b);
if(entry==-1)return(-1);
t = book->valuelist+entry*book->dim;
for (j=0;j<book->dim;)
a[i++]+=t[j++]<<-shift;
}
}
}
return(0);
}
long vorbis_book_decodev_set(codebook *book,ogg_int32_t *a,
oggpack_buffer *b,int n,int point){
if(book->used_entries>0){
int i,j,entry;
ogg_int32_t *t;
int shift=point-book->binarypoint;
if(shift>=0){
for(i=0;i<n;){
entry = decode_packed_entry_number(book,b);
if(entry==-1)return(-1);
t = book->valuelist+entry*book->dim;
for (j=0;j<book->dim;){
a[i++]=t[j++]>>shift;
}
}
}else{
for(i=0;i<n;){
entry = decode_packed_entry_number(book,b);
if(entry==-1)return(-1);
t = book->valuelist+entry*book->dim;
for (j=0;j<book->dim;){
a[i++]=t[j++]<<-shift;
}
}
}
}else{
int i,j;
for(i=0;i<n;){
for (j=0;j<book->dim;){
a[i++]=0;
}
}
}
return(0);
}
long vorbis_book_decodevv_add(codebook *book,ogg_int32_t **a,\
long offset,int ch,
oggpack_buffer *b,int n,int point){
if(book->used_entries>0){
long i,j,entry;
int chptr=0;
int shift=point-book->binarypoint;
if(shift>=0){
for(i=offset;i<offset+n;){
entry = decode_packed_entry_number(book,b);
if(entry==-1)return(-1);
{
const ogg_int32_t *t = book->valuelist+entry*book->dim;
for (j=0;j<book->dim;j++){
a[chptr++][i]+=t[j]>>shift;
if(chptr==ch){
chptr=0;
i++;
}
}
}
}
}else{
for(i=offset;i<offset+n;){
entry = decode_packed_entry_number(book,b);
if(entry==-1)return(-1);
{
const ogg_int32_t *t = book->valuelist+entry*book->dim;
for (j=0;j<book->dim;j++){
a[chptr++][i]+=t[j]<<-shift;
if(chptr==ch){
chptr=0;
i++;
}
}
}
}
}
}
return(0);
}

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: basic shared codebook operations
********************************************************************/
#ifndef _V_CODEBOOK_H_
#define _V_CODEBOOK_H_
#include "ogg.h"
/* This structure encapsulates huffman and VQ style encoding books; it
doesn't do anything specific to either.
valuelist/quantlist are nonNULL (and q_* significant) only if
there's entry->value mapping to be done.
If encode-side mapping must be done (and thus the entry needs to be
hunted), the auxiliary encode pointer will point to a decision
tree. This is true of both VQ and huffman, but is mostly useful
with VQ.
*/
typedef struct static_codebook{
long dim; /* codebook dimensions (elements per vector) */
long entries; /* codebook entries */
long *lengthlist; /* codeword lengths in bits */
/* mapping ***************************************************************/
int maptype; /* 0=none
1=implicitly populated values from map column
2=listed arbitrary values */
/* The below does a linear, single monotonic sequence mapping. */
long q_min; /* packed 32 bit float; quant value 0 maps to minval */
long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */
int q_quant; /* bits: 0 < quant <= 16 */
int q_sequencep; /* bitflag */
long *quantlist; /* map == 1: (int)(entries^(1/dim)) element column map
map == 2: list of dim*entries quantized entry vals
*/
} static_codebook;
typedef struct codebook{
long dim; /* codebook dimensions (elements per vector) */
long entries; /* codebook entries */
long used_entries; /* populated codebook entries */
/* the below are ordered by bitreversed codeword and only used
entries are populated */
int binarypoint;
ogg_int32_t *valuelist; /* list of dim*entries actual entry values */
ogg_uint32_t *codelist; /* list of bitstream codewords for each entry */
int *dec_index;
char *dec_codelengths;
ogg_uint32_t *dec_firsttable;
int dec_firsttablen;
int dec_maxlength;
long q_min; /* packed 32 bit float; quant value 0 maps to minval */
long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */
} codebook;
extern void vorbis_staticbook_clear(static_codebook *b);
extern void vorbis_staticbook_destroy(static_codebook *b);
extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source);
extern void vorbis_book_clear(codebook *b);
extern long _book_maptype1_quantvals(const static_codebook *b);
extern int vorbis_staticbook_unpack(oggpack_buffer *b,static_codebook *c);
extern long vorbis_book_decode(codebook *book, oggpack_buffer *b);
extern long vorbis_book_decodevs_add(codebook *book, ogg_int32_t *a,
oggpack_buffer *b,int n,int point);
extern long vorbis_book_decodev_set(codebook *book, ogg_int32_t *a,
oggpack_buffer *b,int n,int point);
extern long vorbis_book_decodev_add(codebook *book, ogg_int32_t *a,
oggpack_buffer *b,int n,int point);
extern long vorbis_book_decodevv_add(codebook *book, ogg_int32_t **a,
long off,int ch,
oggpack_buffer *b,int n,int point);
extern int _ilog(unsigned int v);
#endif

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: libvorbis codec headers
********************************************************************/
#ifndef _V_CODECI_H_
#define _V_CODECI_H_
#include "codebook.h"
typedef void vorbis_look_mapping;
typedef void vorbis_look_floor;
typedef void vorbis_look_residue;
typedef void vorbis_look_transform;
/* mode ************************************************************/
typedef struct {
int blockflag;
int windowtype;
int transformtype;
int mapping;
} vorbis_info_mode;
typedef void vorbis_info_floor;
typedef void vorbis_info_residue;
typedef void vorbis_info_mapping;
typedef struct private_state {
/* local lookup storage */
const void *window[2];
/* backend lookups are tied to the mode, not the backend or naked mapping */
int modebits;
vorbis_look_mapping **mode;
ogg_int64_t sample_count;
} private_state;
/* codec_setup_info contains all the setup information specific to the
specific compression/decompression mode in progress (eg,
psychoacoustic settings, channel setup, options, codebook
etc).
*********************************************************************/
typedef struct codec_setup_info {
/* Vorbis supports only short and long blocks, but allows the
encoder to choose the sizes */
long blocksizes[2];
/* modes are the primary means of supporting on-the-fly different
blocksizes, different channel mappings (LR or M/A),
different residue backends, etc. Each mode consists of a
blocksize flag and a mapping (along with the mapping setup */
int modes;
int maps;
int times;
int floors;
int residues;
int books;
vorbis_info_mode *mode_param[64];
int map_type[64];
vorbis_info_mapping *map_param[64];
int time_type[64];
int floor_type[64];
vorbis_info_floor *floor_param[64];
int residue_type[64];
vorbis_info_residue *residue_param[64];
static_codebook *book_param[256];
codebook *fullbooks;
int passlimit[32]; /* iteration limit per couple/quant pass */
int coupling_passes;
} codec_setup_info;
#endif

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: #ifdef jail to whip a few platforms into the UNIX ideal.
********************************************************************/
#ifndef _OS_CVTYPES_H
#define _OS_CVTYPES_H
typedef long long ogg_int64_t;
typedef int ogg_int32_t;
typedef unsigned int ogg_uint32_t;
typedef short ogg_int16_t;
#endif

131
source/tremor/configure.in Normal file
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dnl Process this file with autoconf to produce a configure script
dnl ------------------------------------------------
dnl Initialization and Versioning
dnl ------------------------------------------------
AC_INIT(mdct.c)
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AM_CONFIG_HEADER([config.h])
AM_INIT_AUTOMAKE(libvorbisidec,1.2.0)
dnl Library versioning
V_LIB_CURRENT=1
V_LIB_REVISION=2
V_LIB_AGE=0
AC_SUBST(V_LIB_CURRENT)
AC_SUBST(V_LIB_REVISION)
AC_SUBST(V_LIB_AGE)
dnl --------------------------------------------------
dnl Check for programs
dnl --------------------------------------------------
dnl save $CFLAGS since AC_PROG_CC likes to insert "-g -O2"
dnl if $CFLAGS is blank
cflags_save="$CFLAGS"
AC_PROG_CC
AC_PROG_CPP
CFLAGS="$cflags_save"
AM_PROG_LIBTOOL
dnl --------------------------------------------------
dnl Set build flags based on environment
dnl --------------------------------------------------
dnl Set some target options
cflags_save="$CFLAGS"
ldflags_save="$LDFLAGS"
if test -z "$GCC"; then
case $host in
arm-*-*)
DEBUG="-g -D_ARM_ASSEM_"
CFLAGS="-O -D_ARM_ASSEM_"
PROFILE="-p -g -O -D_ARM_ASSEM_" ;;
*)
DEBUG="-g"
CFLAGS="-O"
PROFILE="-g -p" ;;
esac
else
case $host in
arm-*-*)
DEBUG="-g -Wall -D__NO_MATH_INLINES -fsigned-char -D_ARM_ASSEM_"
CFLAGS="-O2 -D_ARM_ASSEM_ -fsigned-char"
PROFILE="-W -pg -g -O2 -D_ARM_ASSEM_ -fsigned-char -fno-inline-functions";;
*)
DEBUG="-g -Wall -D__NO_MATH_INLINES -fsigned-char"
CFLAGS="-O2 -Wall -fsigned-char"
PROFILE="-Wall -pg -g -O2 -fsigned-char -fno-inline-functions";;
esac
fi
CFLAGS="$CFLAGS $cflags_save -D_REENTRANT"
LDFLAGS="$LDFLAGS $ldflags_save"
# Test whenever ld supports -version-script
AC_PROG_LD
AC_PROG_LD_GNU
if test "x$lt_cv_prog_gnu_ld" = "xyes"; then
SHLIB_VERSION_ARG="Wl,--version-script=Version_script"
dnl Set extra linker options
case "$target_os" in
linux* | solaris* )
SHLIB_VERSION_ARG="-Wl,--version-script=Version_script"
;;
*)
;;
esac
LDFLAGS="$LDFLAGS $SHLIB_VERSION_ARG"
fi
dnl --------------------------------------------------
dnl Options
dnl --------------------------------------------------
AC_ARG_ENABLE(
low-accuracy,
[ --enable-low-accuracy enable 32 bit only multiply operations],
CFLAGS="$CFLAGS -D_LOW_ACCURACY_"
)
dnl --------------------------------------------------
dnl Check for headers
dnl --------------------------------------------------
AC_CHECK_HEADER(memory.h,CFLAGS="$CFLAGS -DUSE_MEMORY_H",:)
dnl --------------------------------------------------
dnl Check for typedefs, structures, etc
dnl --------------------------------------------------
dnl none
dnl --------------------------------------------------
dnl Check for library functions
dnl --------------------------------------------------
AC_FUNC_ALLOCA
AC_FUNC_MEMCMP
dnl --------------------------------------------------
dnl Do substitutions
dnl --------------------------------------------------
LIBS="$LIBS"
AC_SUBST(LIBS)
AC_SUBST(DEBUG)
AC_SUBST(PROFILE)
AC_OUTPUT(Makefile Version_script)

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: floor backend 0 implementation
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "registry.h"
#include "codebook.h"
#include "misc.h"
#include "block.h"
#define LSP_FRACBITS 14
typedef struct {
long n;
int ln;
int m;
int *linearmap;
vorbis_info_floor0 *vi;
ogg_int32_t *lsp_look;
} vorbis_look_floor0;
/*************** LSP decode ********************/
#include "lsp_lookup.h"
/* interpolated 1./sqrt(p) where .5 <= a < 1. (.100000... to .111111...) in
16.16 format
returns in m.8 format */
static long ADJUST_SQRT2[2]={8192,5792};
STIN ogg_int32_t vorbis_invsqlook_i(long a,long e){
long i=(a&0x7fff)>>(INVSQ_LOOKUP_I_SHIFT-1);
long d=a&INVSQ_LOOKUP_I_MASK; /* 0.10 */
long val=INVSQ_LOOKUP_I[i]- /* 1.16 */
((INVSQ_LOOKUP_IDel[i]*d)>>INVSQ_LOOKUP_I_SHIFT); /* result 1.16 */
val*=ADJUST_SQRT2[e&1];
e=(e>>1)+21;
return(val>>e);
}
/* interpolated lookup based fromdB function, domain -140dB to 0dB only */
/* a is in n.12 format */
STIN ogg_int32_t vorbis_fromdBlook_i(long a){
int i=(-a)>>(12-FROMdB2_SHIFT);
if(i<0) return 0x7fffffff;
if(i>=(FROMdB_LOOKUP_SZ<<FROMdB_SHIFT))return 0;
return FROMdB_LOOKUP[i>>FROMdB_SHIFT] * FROMdB2_LOOKUP[i&FROMdB2_MASK];
}
/* interpolated lookup based cos function, domain 0 to PI only */
/* a is in 0.16 format, where 0==0, 2^^16-1==PI, return 0.14 */
STIN ogg_int32_t vorbis_coslook_i(long a){
int i=a>>COS_LOOKUP_I_SHIFT;
int d=a&COS_LOOKUP_I_MASK;
return COS_LOOKUP_I[i]- ((d*(COS_LOOKUP_I[i]-COS_LOOKUP_I[i+1]))>>
COS_LOOKUP_I_SHIFT);
}
/* interpolated lookup based cos function */
/* a is in 0.16 format, where 0==0, 2^^16==PI, return .LSP_FRACBITS */
STIN ogg_int32_t vorbis_coslook2_i(long a){
a=a&0x1ffff;
if(a>0x10000)a=0x20000-a;
{
int i=a>>COS_LOOKUP_I_SHIFT;
int d=a&COS_LOOKUP_I_MASK;
a=((COS_LOOKUP_I[i]<<COS_LOOKUP_I_SHIFT)-
d*(COS_LOOKUP_I[i]-COS_LOOKUP_I[i+1]))>>
(COS_LOOKUP_I_SHIFT-LSP_FRACBITS+14);
}
return(a);
}
static const int barklook[28]={
0,100,200,301, 405,516,635,766,
912,1077,1263,1476, 1720,2003,2333,2721,
3184,3742,4428,5285, 6376,7791,9662,12181,
15624,20397,27087,36554
};
/* used in init only; interpolate the long way */
STIN ogg_int32_t toBARK(int n){
int i;
for(i=0;i<27;i++)
if(n>=barklook[i] && n<barklook[i+1])break;
if(i==27){
return 27<<15;
}else{
int gap=barklook[i+1]-barklook[i];
int del=n-barklook[i];
return((i<<15)+((del<<15)/gap));
}
}
static const unsigned char MLOOP_1[64]={
0,10,11,11, 12,12,12,12, 13,13,13,13, 13,13,13,13,
14,14,14,14, 14,14,14,14, 14,14,14,14, 14,14,14,14,
15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
15,15,15,15, 15,15,15,15, 15,15,15,15, 15,15,15,15,
};
static const unsigned char MLOOP_2[64]={
0,4,5,5, 6,6,6,6, 7,7,7,7, 7,7,7,7,
8,8,8,8, 8,8,8,8, 8,8,8,8, 8,8,8,8,
9,9,9,9, 9,9,9,9, 9,9,9,9, 9,9,9,9,
9,9,9,9, 9,9,9,9, 9,9,9,9, 9,9,9,9,
};
static const unsigned char MLOOP_3[8]={0,1,2,2,3,3,3,3};
void vorbis_lsp_to_curve(ogg_int32_t *curve,int *map,int n,int ln,
ogg_int32_t *lsp,int m,
ogg_int32_t amp,
ogg_int32_t ampoffset,
ogg_int32_t *icos){
/* 0 <= m < 256 */
/* set up for using all int later */
int i;
int ampoffseti=ampoffset*4096;
int ampi=amp;
ogg_int32_t *ilsp=(ogg_int32_t *)alloca(m*sizeof(*ilsp));
/* lsp is in 8.24, range 0 to PI; coslook wants it in .16 0 to 1*/
for(i=0;i<m;i++){
#ifndef _LOW_ACCURACY_
ogg_int32_t val=MULT32(lsp[i],0x517cc2);
#else
ogg_int32_t val=((lsp[i]>>10)*0x517d)>>14;
#endif
/* safeguard against a malicious stream */
if(val<0 || (val>>COS_LOOKUP_I_SHIFT)>=COS_LOOKUP_I_SZ){
memset(curve,0,sizeof(*curve)*n);
return;
}
ilsp[i]=vorbis_coslook_i(val);
}
i=0;
while(i<n){
int j,k=map[i];
ogg_uint32_t pi=46341; /* 2**-.5 in 0.16 */
ogg_uint32_t qi=46341;
ogg_int32_t qexp=0,shift;
ogg_int32_t wi=icos[k];
#ifdef _V_LSP_MATH_ASM
lsp_loop_asm(&qi,&pi,&qexp,ilsp,wi,m);
pi=((pi*pi)>>16);
qi=((qi*qi)>>16);
if(m&1){
qexp= qexp*2-28*((m+1)>>1)+m;
pi*=(1<<14)-((wi*wi)>>14);
qi+=pi>>14;
}else{
qexp= qexp*2-13*m;
pi*=(1<<14)-wi;
qi*=(1<<14)+wi;
qi=(qi+pi)>>14;
}
if(qi&0xffff0000){ /* checks for 1.xxxxxxxxxxxxxxxx */
qi>>=1; qexp++;
}else
lsp_norm_asm(&qi,&qexp);
#else
qi*=labs(ilsp[0]-wi);
pi*=labs(ilsp[1]-wi);
for(j=3;j<m;j+=2){
if(!(shift=MLOOP_1[(pi|qi)>>25]))
if(!(shift=MLOOP_2[(pi|qi)>>19]))
shift=MLOOP_3[(pi|qi)>>16];
qi=(qi>>shift)*labs(ilsp[j-1]-wi);
pi=(pi>>shift)*labs(ilsp[j]-wi);
qexp+=shift;
}
if(!(shift=MLOOP_1[(pi|qi)>>25]))
if(!(shift=MLOOP_2[(pi|qi)>>19]))
shift=MLOOP_3[(pi|qi)>>16];
/* pi,qi normalized collectively, both tracked using qexp */
if(m&1){
/* odd order filter; slightly assymetric */
/* the last coefficient */
qi=(qi>>shift)*labs(ilsp[j-1]-wi);
pi=(pi>>shift)<<14;
qexp+=shift;
if(!(shift=MLOOP_1[(pi|qi)>>25]))
if(!(shift=MLOOP_2[(pi|qi)>>19]))
shift=MLOOP_3[(pi|qi)>>16];
pi>>=shift;
qi>>=shift;
qexp+=shift-14*((m+1)>>1);
pi=((pi*pi)>>16);
qi=((qi*qi)>>16);
qexp=qexp*2+m;
pi*=(1<<14)-((wi*wi)>>14);
qi+=pi>>14;
}else{
/* even order filter; still symmetric */
/* p*=p(1-w), q*=q(1+w), let normalization drift because it isn't
worth tracking step by step */
pi>>=shift;
qi>>=shift;
qexp+=shift-7*m;
pi=((pi*pi)>>16);
qi=((qi*qi)>>16);
qexp=qexp*2+m;
pi*=(1<<14)-wi;
qi*=(1<<14)+wi;
qi=(qi+pi)>>14;
}
/* we've let the normalization drift because it wasn't important;
however, for the lookup, things must be normalized again. We
need at most one right shift or a number of left shifts */
if(qi&0xffff0000){ /* checks for 1.xxxxxxxxxxxxxxxx */
qi>>=1; qexp++;
}else
while(qi && !(qi&0x8000)){ /* checks for 0.0xxxxxxxxxxxxxxx or less*/
qi<<=1; qexp--;
}
#endif
amp=vorbis_fromdBlook_i(ampi* /* n.4 */
vorbis_invsqlook_i(qi,qexp)-
/* m.8, m+n<=8 */
ampoffseti); /* 8.12[0] */
#ifdef _LOW_ACCURACY_
amp>>=9;
#endif
curve[i]= MULT31_SHIFT15(curve[i],amp);
while(map[++i]==k) curve[i]= MULT31_SHIFT15(curve[i],amp);
}
}
/*************** vorbis decode glue ************/
static void floor0_free_info(vorbis_info_floor *i){
vorbis_info_floor0 *info=(vorbis_info_floor0 *)i;
if(info){
memset(info,0,sizeof(*info));
_ogg_free(info);
}
}
static void floor0_free_look(vorbis_look_floor *i){
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i;
if(look){
if(look->linearmap)_ogg_free(look->linearmap);
if(look->lsp_look)_ogg_free(look->lsp_look);
memset(look,0,sizeof(*look));
_ogg_free(look);
}
}
static vorbis_info_floor *floor0_unpack (vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
int j;
vorbis_info_floor0 *info=(vorbis_info_floor0 *)_ogg_malloc(sizeof(*info));
info->order=oggpack_read(opb,8);
info->rate=oggpack_read(opb,16);
info->barkmap=oggpack_read(opb,16);
info->ampbits=oggpack_read(opb,6);
info->ampdB=oggpack_read(opb,8);
info->numbooks=oggpack_read(opb,4)+1;
if(info->order<1)goto err_out;
if(info->rate<1)goto err_out;
if(info->barkmap<1)goto err_out;
if(info->numbooks<1)goto err_out;
for(j=0;j<info->numbooks;j++){
info->books[j]=oggpack_read(opb,8);
if(info->books[j]<0 || info->books[j]>=ci->books)goto err_out;
}
return(info);
err_out:
floor0_free_info(info);
return(NULL);
}
/* initialize Bark scale and normalization lookups. We could do this
with static tables, but Vorbis allows a number of possible
combinations, so it's best to do it computationally.
The below is authoritative in terms of defining scale mapping.
Note that the scale depends on the sampling rate as well as the
linear block and mapping sizes */
static vorbis_look_floor *floor0_look (vorbis_dsp_state *vd,vorbis_info_mode *mi,
vorbis_info_floor *i){
int j;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
vorbis_info_floor0 *info=(vorbis_info_floor0 *)i;
vorbis_look_floor0 *look=(vorbis_look_floor0 *)_ogg_calloc(1,sizeof(*look));
look->m=info->order;
look->n=ci->blocksizes[mi->blockflag]/2;
look->ln=info->barkmap;
look->vi=info;
/* the mapping from a linear scale to a smaller bark scale is
straightforward. We do *not* make sure that the linear mapping
does not skip bark-scale bins; the decoder simply skips them and
the encoder may do what it wishes in filling them. They're
necessary in some mapping combinations to keep the scale spacing
accurate */
look->linearmap=(int *)_ogg_malloc((look->n+1)*sizeof(*look->linearmap));
for(j=0;j<look->n;j++){
int val=(look->ln*
((toBARK(info->rate/2*j/look->n)<<11)/toBARK(info->rate/2)))>>11;
if(val>=look->ln)val=look->ln-1; /* guard against the approximation */
look->linearmap[j]=val;
}
look->linearmap[j]=-1;
look->lsp_look=(ogg_int32_t *)_ogg_malloc(look->ln*sizeof(*look->lsp_look));
for(j=0;j<look->ln;j++)
look->lsp_look[j]=vorbis_coslook2_i(0x10000*j/look->ln);
return look;
}
static void *floor0_inverse1(vorbis_block *vb,vorbis_look_floor *i){
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i;
vorbis_info_floor0 *info=look->vi;
int j,k;
int ampraw=oggpack_read(&vb->opb,info->ampbits);
if(ampraw>0){ /* also handles the -1 out of data case */
long maxval=(1<<info->ampbits)-1;
int amp=((ampraw*info->ampdB)<<4)/maxval;
int booknum=oggpack_read(&vb->opb,_ilog(info->numbooks));
if(booknum!=-1 && booknum<info->numbooks){ /* be paranoid */
codec_setup_info *ci=(codec_setup_info *)vb->vd->vi->codec_setup;
codebook *b=ci->fullbooks+info->books[booknum];
ogg_int32_t last=0;
ogg_int32_t *lsp=(ogg_int32_t *)_vorbis_block_alloc(vb,sizeof(*lsp)*(look->m+1));
for(j=0;j<look->m;j+=b->dim)
if(vorbis_book_decodev_set(b,lsp+j,&vb->opb,b->dim,-24)==-1)goto eop;
for(j=0;j<look->m;){
for(k=0;k<b->dim;k++,j++)lsp[j]+=last;
last=lsp[j-1];
}
lsp[look->m]=amp;
return(lsp);
}
}
eop:
return(NULL);
}
static int floor0_inverse2(vorbis_block *vb,vorbis_look_floor *i,
void *memo,ogg_int32_t *out){
vorbis_look_floor0 *look=(vorbis_look_floor0 *)i;
vorbis_info_floor0 *info=look->vi;
if(memo){
ogg_int32_t *lsp=(ogg_int32_t *)memo;
ogg_int32_t amp=lsp[look->m];
/* take the coefficients back to a spectral envelope curve */
vorbis_lsp_to_curve(out,look->linearmap,look->n,look->ln,
lsp,look->m,amp,info->ampdB,look->lsp_look);
return(1);
}
memset(out,0,sizeof(*out)*look->n);
return(0);
}
/* export hooks */
vorbis_func_floor floor0_exportbundle={
&floor0_unpack,&floor0_look,&floor0_free_info,
&floor0_free_look,&floor0_inverse1,&floor0_inverse2
};

441
source/tremor/floor1.c Normal file
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@ -0,0 +1,441 @@
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: floor backend 1 implementation
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "registry.h"
#include "codebook.h"
#include "misc.h"
#include "block.h"
#define floor1_rangedB 140 /* floor 1 fixed at -140dB to 0dB range */
typedef struct {
int forward_index[VIF_POSIT+2];
int hineighbor[VIF_POSIT];
int loneighbor[VIF_POSIT];
int posts;
int n;
int quant_q;
vorbis_info_floor1 *vi;
} vorbis_look_floor1;
/***********************************************/
static void floor1_free_info(vorbis_info_floor *i){
vorbis_info_floor1 *info=(vorbis_info_floor1 *)i;
if(info){
memset(info,0,sizeof(*info));
_ogg_free(info);
}
}
static void floor1_free_look(vorbis_look_floor *i){
vorbis_look_floor1 *look=(vorbis_look_floor1 *)i;
if(look){
memset(look,0,sizeof(*look));
_ogg_free(look);
}
}
static int ilog(unsigned int v){
int ret=0;
while(v){
ret++;
v>>=1;
}
return(ret);
}
static vorbis_info_floor *floor1_unpack (vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
int j,k,count=0,maxclass=-1,rangebits;
vorbis_info_floor1 *info=(vorbis_info_floor1 *)_ogg_calloc(1,sizeof(*info));
/* read partitions */
info->partitions=oggpack_read(opb,5); /* only 0 to 31 legal */
for(j=0;j<info->partitions;j++){
info->partitionclass[j]=oggpack_read(opb,4); /* only 0 to 15 legal */
if(maxclass<info->partitionclass[j])maxclass=info->partitionclass[j];
}
/* read partition classes */
for(j=0;j<maxclass+1;j++){
info->class_dim[j]=oggpack_read(opb,3)+1; /* 1 to 8 */
info->class_subs[j]=oggpack_read(opb,2); /* 0,1,2,3 bits */
if(info->class_subs[j]<0)
goto err_out;
if(info->class_subs[j])info->class_book[j]=oggpack_read(opb,8);
if(info->class_book[j]<0 || info->class_book[j]>=ci->books)
goto err_out;
for(k=0;k<(1<<info->class_subs[j]);k++){
info->class_subbook[j][k]=oggpack_read(opb,8)-1;
if(info->class_subbook[j][k]<-1 || info->class_subbook[j][k]>=ci->books)
goto err_out;
}
}
/* read the post list */
info->mult=oggpack_read(opb,2)+1; /* only 1,2,3,4 legal now */
rangebits=oggpack_read(opb,4);
for(j=0,k=0;j<info->partitions;j++){
count+=info->class_dim[info->partitionclass[j]];
for(;k<count;k++){
int t=info->postlist[k+2]=oggpack_read(opb,rangebits);
if(t<0 || t>=(1<<rangebits))
goto err_out;
}
}
info->postlist[0]=0;
info->postlist[1]=1<<rangebits;
return(info);
err_out:
floor1_free_info(info);
return(NULL);
}
static int icomp(const void *a,const void *b){
return(**(int **)a-**(int **)b);
}
static vorbis_look_floor *floor1_look(vorbis_dsp_state *vd,vorbis_info_mode *mi,
vorbis_info_floor *in){
int *sortpointer[VIF_POSIT+2];
vorbis_info_floor1 *info=(vorbis_info_floor1 *)in;
vorbis_look_floor1 *look=(vorbis_look_floor1 *)_ogg_calloc(1,sizeof(*look));
int i,j,n=0;
look->vi=info;
look->n=info->postlist[1];
/* we drop each position value in-between already decoded values,
and use linear interpolation to predict each new value past the
edges. The positions are read in the order of the position
list... we precompute the bounding positions in the lookup. Of
course, the neighbors can change (if a position is declined), but
this is an initial mapping */
for(i=0;i<info->partitions;i++)n+=info->class_dim[info->partitionclass[i]];
n+=2;
look->posts=n;
/* also store a sorted position index */
for(i=0;i<n;i++)sortpointer[i]=info->postlist+i;
qsort(sortpointer,n,sizeof(*sortpointer),icomp);
/* points from sort order back to range number */
for(i=0;i<n;i++)look->forward_index[i]=sortpointer[i]-info->postlist;
/* quantize values to multiplier spec */
switch(info->mult){
case 1: /* 1024 -> 256 */
look->quant_q=256;
break;
case 2: /* 1024 -> 128 */
look->quant_q=128;
break;
case 3: /* 1024 -> 86 */
look->quant_q=86;
break;
case 4: /* 1024 -> 64 */
look->quant_q=64;
break;
}
/* discover our neighbors for decode where we don't use fit flags
(that would push the neighbors outward) */
for(i=0;i<n-2;i++){
int lo=0;
int hi=1;
int lx=0;
int hx=look->n;
int currentx=info->postlist[i+2];
for(j=0;j<i+2;j++){
int x=info->postlist[j];
if(x>lx && x<currentx){
lo=j;
lx=x;
}
if(x<hx && x>currentx){
hi=j;
hx=x;
}
}
look->loneighbor[i]=lo;
look->hineighbor[i]=hi;
}
return(look);
}
static int render_point(int x0,int x1,int y0,int y1,int x){
y0&=0x7fff; /* mask off flag */
y1&=0x7fff;
{
int dy=y1-y0;
int adx=x1-x0;
int ady=abs(dy);
int err=ady*(x-x0);
int off=err/adx;
if(dy<0)return(y0-off);
return(y0+off);
}
}
#ifdef _LOW_ACCURACY_
# define XdB(n) ((((n)>>8)+1)>>1)
#else
# define XdB(n) (n)
#endif
static const ogg_int32_t FLOOR_fromdB_LOOKUP[256]={
XdB(0x000000e5), XdB(0x000000f4), XdB(0x00000103), XdB(0x00000114),
XdB(0x00000126), XdB(0x00000139), XdB(0x0000014e), XdB(0x00000163),
XdB(0x0000017a), XdB(0x00000193), XdB(0x000001ad), XdB(0x000001c9),
XdB(0x000001e7), XdB(0x00000206), XdB(0x00000228), XdB(0x0000024c),
XdB(0x00000272), XdB(0x0000029b), XdB(0x000002c6), XdB(0x000002f4),
XdB(0x00000326), XdB(0x0000035a), XdB(0x00000392), XdB(0x000003cd),
XdB(0x0000040c), XdB(0x00000450), XdB(0x00000497), XdB(0x000004e4),
XdB(0x00000535), XdB(0x0000058c), XdB(0x000005e8), XdB(0x0000064a),
XdB(0x000006b3), XdB(0x00000722), XdB(0x00000799), XdB(0x00000818),
XdB(0x0000089e), XdB(0x0000092e), XdB(0x000009c6), XdB(0x00000a69),
XdB(0x00000b16), XdB(0x00000bcf), XdB(0x00000c93), XdB(0x00000d64),
XdB(0x00000e43), XdB(0x00000f30), XdB(0x0000102d), XdB(0x0000113a),
XdB(0x00001258), XdB(0x0000138a), XdB(0x000014cf), XdB(0x00001629),
XdB(0x0000179a), XdB(0x00001922), XdB(0x00001ac4), XdB(0x00001c82),
XdB(0x00001e5c), XdB(0x00002055), XdB(0x0000226f), XdB(0x000024ac),
XdB(0x0000270e), XdB(0x00002997), XdB(0x00002c4b), XdB(0x00002f2c),
XdB(0x0000323d), XdB(0x00003581), XdB(0x000038fb), XdB(0x00003caf),
XdB(0x000040a0), XdB(0x000044d3), XdB(0x0000494c), XdB(0x00004e10),
XdB(0x00005323), XdB(0x0000588a), XdB(0x00005e4b), XdB(0x0000646b),
XdB(0x00006af2), XdB(0x000071e5), XdB(0x0000794c), XdB(0x0000812e),
XdB(0x00008993), XdB(0x00009283), XdB(0x00009c09), XdB(0x0000a62d),
XdB(0x0000b0f9), XdB(0x0000bc79), XdB(0x0000c8b9), XdB(0x0000d5c4),
XdB(0x0000e3a9), XdB(0x0000f274), XdB(0x00010235), XdB(0x000112fd),
XdB(0x000124dc), XdB(0x000137e4), XdB(0x00014c29), XdB(0x000161bf),
XdB(0x000178bc), XdB(0x00019137), XdB(0x0001ab4a), XdB(0x0001c70e),
XdB(0x0001e4a1), XdB(0x0002041f), XdB(0x000225aa), XdB(0x00024962),
XdB(0x00026f6d), XdB(0x000297f0), XdB(0x0002c316), XdB(0x0002f109),
XdB(0x000321f9), XdB(0x00035616), XdB(0x00038d97), XdB(0x0003c8b4),
XdB(0x000407a7), XdB(0x00044ab2), XdB(0x00049218), XdB(0x0004de23),
XdB(0x00052f1e), XdB(0x0005855c), XdB(0x0005e135), XdB(0x00064306),
XdB(0x0006ab33), XdB(0x00071a24), XdB(0x0007904b), XdB(0x00080e20),
XdB(0x00089422), XdB(0x000922da), XdB(0x0009bad8), XdB(0x000a5cb6),
XdB(0x000b091a), XdB(0x000bc0b1), XdB(0x000c8436), XdB(0x000d5471),
XdB(0x000e3233), XdB(0x000f1e5f), XdB(0x001019e4), XdB(0x001125c1),
XdB(0x00124306), XdB(0x001372d5), XdB(0x0014b663), XdB(0x00160ef7),
XdB(0x00177df0), XdB(0x001904c1), XdB(0x001aa4f9), XdB(0x001c603d),
XdB(0x001e384f), XdB(0x00202f0f), XdB(0x0022467a), XdB(0x002480b1),
XdB(0x0026dff7), XdB(0x002966b3), XdB(0x002c1776), XdB(0x002ef4fc),
XdB(0x0032022d), XdB(0x00354222), XdB(0x0038b828), XdB(0x003c67c2),
XdB(0x004054ae), XdB(0x004482e8), XdB(0x0048f6af), XdB(0x004db488),
XdB(0x0052c142), XdB(0x005821ff), XdB(0x005ddc33), XdB(0x0063f5b0),
XdB(0x006a74a7), XdB(0x00715faf), XdB(0x0078bdce), XdB(0x0080967f),
XdB(0x0088f1ba), XdB(0x0091d7f9), XdB(0x009b5247), XdB(0x00a56a41),
XdB(0x00b02a27), XdB(0x00bb9ce2), XdB(0x00c7ce12), XdB(0x00d4ca17),
XdB(0x00e29e20), XdB(0x00f15835), XdB(0x0101074b), XdB(0x0111bb4e),
XdB(0x01238531), XdB(0x01367704), XdB(0x014aa402), XdB(0x016020a7),
XdB(0x017702c3), XdB(0x018f6190), XdB(0x01a955cb), XdB(0x01c4f9cf),
XdB(0x01e269a8), XdB(0x0201c33b), XdB(0x0223265a), XdB(0x0246b4ea),
XdB(0x026c9302), XdB(0x0294e716), XdB(0x02bfda13), XdB(0x02ed9793),
XdB(0x031e4e09), XdB(0x03522ee4), XdB(0x03896ed0), XdB(0x03c445e2),
XdB(0x0402efd6), XdB(0x0445ac4b), XdB(0x048cbefc), XdB(0x04d87013),
XdB(0x05290c67), XdB(0x057ee5ca), XdB(0x05da5364), XdB(0x063bb204),
XdB(0x06a36485), XdB(0x0711d42b), XdB(0x0787710e), XdB(0x0804b299),
XdB(0x088a17ef), XdB(0x0918287e), XdB(0x09af747c), XdB(0x0a50957e),
XdB(0x0afc2f19), XdB(0x0bb2ef7f), XdB(0x0c759034), XdB(0x0d44d6ca),
XdB(0x0e2195bc), XdB(0x0f0cad0d), XdB(0x10070b62), XdB(0x1111aeea),
XdB(0x122da66c), XdB(0x135c120f), XdB(0x149e24d9), XdB(0x15f525b1),
XdB(0x176270e3), XdB(0x18e7794b), XdB(0x1a85c9ae), XdB(0x1c3f06d1),
XdB(0x1e14f07d), XdB(0x200963d7), XdB(0x221e5ccd), XdB(0x2455f870),
XdB(0x26b2770b), XdB(0x29363e2b), XdB(0x2be3db5c), XdB(0x2ebe06b6),
XdB(0x31c7a55b), XdB(0x3503ccd4), XdB(0x3875c5aa), XdB(0x3c210f44),
XdB(0x4009632b), XdB(0x4432b8cf), XdB(0x48a149bc), XdB(0x4d59959e),
XdB(0x52606733), XdB(0x57bad899), XdB(0x5d6e593a), XdB(0x6380b298),
XdB(0x69f80e9a), XdB(0x70dafda8), XdB(0x78307d76), XdB(0x7fffffff),
};
static void render_line(int n, int x0,int x1,int y0,int y1,ogg_int32_t *d){
int dy=y1-y0;
int adx=x1-x0;
int ady=abs(dy);
int base=dy/adx;
int sy=(dy<0?base-1:base+1);
int x=x0;
int y=y0;
int err=0;
if(n>x1)n=x1;
ady-=abs(base*adx);
if(x<n)
d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]);
while(++x<n){
err=err+ady;
if(err>=adx){
err-=adx;
y+=sy;
}else{
y+=base;
}
d[x]= MULT31_SHIFT15(d[x],FLOOR_fromdB_LOOKUP[y]);
}
}
static void *floor1_inverse1(vorbis_block *vb,vorbis_look_floor *in){
vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
vorbis_info_floor1 *info=look->vi;
codec_setup_info *ci=(codec_setup_info *)vb->vd->vi->codec_setup;
int i,j,k;
codebook *books=ci->fullbooks;
/* unpack wrapped/predicted values from stream */
if(oggpack_read(&vb->opb,1)==1){
int *fit_value=(int *)_vorbis_block_alloc(vb,(look->posts)*sizeof(*fit_value));
fit_value[0]=oggpack_read(&vb->opb,ilog(look->quant_q-1));
fit_value[1]=oggpack_read(&vb->opb,ilog(look->quant_q-1));
/* partition by partition */
/* partition by partition */
for(i=0,j=2;i<info->partitions;i++){
int classv=info->partitionclass[i];
int cdim=info->class_dim[classv];
int csubbits=info->class_subs[classv];
int csub=1<<csubbits;
int cval=0;
/* decode the partition's first stage cascade value */
if(csubbits){
cval=vorbis_book_decode(books+info->class_book[classv],&vb->opb);
if(cval==-1)goto eop;
}
for(k=0;k<cdim;k++){
int book=info->class_subbook[classv][cval&(csub-1)];
cval>>=csubbits;
if(book>=0){
if((fit_value[j+k]=vorbis_book_decode(books+book,&vb->opb))==-1)
goto eop;
}else{
fit_value[j+k]=0;
}
}
j+=cdim;
}
/* unwrap positive values and reconsitute via linear interpolation */
for(i=2;i<look->posts;i++){
int predicted=render_point(info->postlist[look->loneighbor[i-2]],
info->postlist[look->hineighbor[i-2]],
fit_value[look->loneighbor[i-2]],
fit_value[look->hineighbor[i-2]],
info->postlist[i]);
int hiroom=look->quant_q-predicted;
int loroom=predicted;
int room=(hiroom<loroom?hiroom:loroom)<<1;
int val=fit_value[i];
if(val){
if(val>=room){
if(hiroom>loroom){
val = val-loroom;
}else{
val = -1-(val-hiroom);
}
}else{
if(val&1){
val= -((val+1)>>1);
}else{
val>>=1;
}
}
fit_value[i]=val+predicted;
fit_value[look->loneighbor[i-2]]&=0x7fff;
fit_value[look->hineighbor[i-2]]&=0x7fff;
}else{
fit_value[i]=predicted|0x8000;
}
}
return(fit_value);
}
eop:
return(NULL);
}
static int floor1_inverse2(vorbis_block *vb,vorbis_look_floor *in,void *memo,
ogg_int32_t *out){
vorbis_look_floor1 *look=(vorbis_look_floor1 *)in;
vorbis_info_floor1 *info=look->vi;
codec_setup_info *ci=(codec_setup_info *)vb->vd->vi->codec_setup;
int n=ci->blocksizes[vb->W]/2;
int j;
if(memo){
/* render the lines */
int *fit_value=(int *)memo;
int hx=0;
int lx=0;
int ly=fit_value[0]*info->mult;
for(j=1;j<look->posts;j++){
int current=look->forward_index[j];
int hy=fit_value[current]&0x7fff;
if(hy==fit_value[current]){
hy*=info->mult;
hx=info->postlist[current];
render_line(n,lx,hx,ly,hy,out);
lx=hx;
ly=hy;
}
}
for(j=hx;j<n;j++)out[j]*=ly; /* be certain */
return(1);
}
memset(out,0,sizeof(*out)*n);
return(0);
}
/* export hooks */
vorbis_func_floor floor1_exportbundle={
&floor1_unpack,&floor1_look,&floor1_free_info,
&floor1_free_look,&floor1_inverse1,&floor1_inverse2
};

1126
source/tremor/framing.c Normal file
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356
source/tremor/info.c Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: maintain the info structure, info <-> header packets
********************************************************************/
/* general handling of the header and the vorbis_info structure (and
substructures) */
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "codebook.h"
#include "registry.h"
#include "window.h"
#include "misc.h"
/* helpers */
static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
while(bytes--){
*buf++=oggpack_read(o,8);
}
}
void vorbis_comment_init(vorbis_comment *vc){
memset(vc,0,sizeof(*vc));
}
/* This is more or less the same as strncasecmp - but that doesn't exist
* everywhere, and this is a fairly trivial function, so we include it */
static int tagcompare(const char *s1, const char *s2, int n){
int c=0;
while(c < n){
if(toupper((int)s1[c]) != toupper((int)s2[c]))
return !0;
c++;
}
return 0;
}
char *vorbis_comment_query(vorbis_comment *vc, char *tag, int count){
long i;
int found = 0;
int taglen = strlen(tag)+1; /* +1 for the = we append */
char *fulltag = (char *)alloca(taglen+ 1);
strcpy(fulltag, tag);
strcat(fulltag, "=");
for(i=0;i<vc->comments;i++){
if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
if(count == found)
/* We return a pointer to the data, not a copy */
return vc->user_comments[i] + taglen;
else
found++;
}
}
return NULL; /* didn't find anything */
}
int vorbis_comment_query_count(vorbis_comment *vc, char *tag){
int i,count=0;
int taglen = strlen(tag)+1; /* +1 for the = we append */
char *fulltag = (char *)alloca(taglen+1);
strcpy(fulltag,tag);
strcat(fulltag, "=");
for(i=0;i<vc->comments;i++){
if(!tagcompare(vc->user_comments[i], fulltag, taglen))
count++;
}
return count;
}
void vorbis_comment_clear(vorbis_comment *vc){
if(vc){
long i;
for(i=0;i<vc->comments;i++)
if(vc->user_comments[i])_ogg_free(vc->user_comments[i]);
if(vc->user_comments)_ogg_free(vc->user_comments);
if(vc->comment_lengths)_ogg_free(vc->comment_lengths);
if(vc->vendor)_ogg_free(vc->vendor);
memset(vc,0,sizeof(*vc));
}
}
/* blocksize 0 is guaranteed to be short, 1 is guarantted to be long.
They may be equal, but short will never ge greater than long */
int vorbis_info_blocksize(vorbis_info *vi,int zo){
codec_setup_info *ci = (codec_setup_info *)vi->codec_setup;
return ci ? ci->blocksizes[zo] : -1;
}
/* used by synthesis, which has a full, alloced vi */
void vorbis_info_init(vorbis_info *vi){
memset(vi,0,sizeof(*vi));
vi->codec_setup=(codec_setup_info *)_ogg_calloc(1,sizeof(codec_setup_info));
}
void vorbis_info_clear(vorbis_info *vi){
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
int i;
if(ci){
for(i=0;i<ci->modes;i++)
if(ci->mode_param[i])_ogg_free(ci->mode_param[i]);
for(i=0;i<ci->maps;i++) /* unpack does the range checking */
if(ci->map_param[i])
_mapping_P[ci->map_type[i]]->free_info(ci->map_param[i]);
for(i=0;i<ci->floors;i++) /* unpack does the range checking */
if(ci->floor_param[i])
_floor_P[ci->floor_type[i]]->free_info(ci->floor_param[i]);
for(i=0;i<ci->residues;i++) /* unpack does the range checking */
if(ci->residue_param[i])
_residue_P[ci->residue_type[i]]->free_info(ci->residue_param[i]);
for(i=0;i<ci->books;i++){
if(ci->book_param[i]){
/* knows if the book was not alloced */
vorbis_staticbook_destroy(ci->book_param[i]);
}
if(ci->fullbooks)
vorbis_book_clear(ci->fullbooks+i);
}
if(ci->fullbooks)
_ogg_free(ci->fullbooks);
_ogg_free(ci);
}
memset(vi,0,sizeof(*vi));
}
/* Header packing/unpacking ********************************************/
static int _vorbis_unpack_info(vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
if(!ci)return(OV_EFAULT);
vi->version=oggpack_read(opb,32);
if(vi->version!=0)return(OV_EVERSION);
vi->channels=oggpack_read(opb,8);
vi->rate=oggpack_read(opb,32);
vi->bitrate_upper=oggpack_read(opb,32);
vi->bitrate_nominal=oggpack_read(opb,32);
vi->bitrate_lower=oggpack_read(opb,32);
ci->blocksizes[0]=1<<oggpack_read(opb,4);
ci->blocksizes[1]=1<<oggpack_read(opb,4);
if(vi->rate<1)goto err_out;
if(vi->channels<1)goto err_out;
if(ci->blocksizes[0]<64)goto err_out;
if(ci->blocksizes[1]<ci->blocksizes[0])goto err_out;
if(ci->blocksizes[1]>8192)goto err_out;
if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
return(0);
err_out:
vorbis_info_clear(vi);
return(OV_EBADHEADER);
}
static int _vorbis_unpack_comment(vorbis_comment *vc,oggpack_buffer *opb){
int i;
int vendorlen=oggpack_read(opb,32);
if(vendorlen<0)goto err_out;
vc->vendor=(char *)_ogg_calloc(vendorlen+1,1);
_v_readstring(opb,vc->vendor,vendorlen);
vc->comments=oggpack_read(opb,32);
if(vc->comments<0)goto err_out;
vc->user_comments=(char **)_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
vc->comment_lengths=(int *)_ogg_calloc(vc->comments+1, sizeof(*vc->comment_lengths));
for(i=0;i<vc->comments;i++){
int len=oggpack_read(opb,32);
if(len<0)goto err_out;
vc->comment_lengths[i]=len;
vc->user_comments[i]=(char *)_ogg_calloc(len+1,1);
_v_readstring(opb,vc->user_comments[i],len);
}
if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
return(0);
err_out:
vorbis_comment_clear(vc);
return(OV_EBADHEADER);
}
/* all of the real encoding details are here. The modes, books,
everything */
static int _vorbis_unpack_books(vorbis_info *vi,oggpack_buffer *opb){
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
int i;
if(!ci)return(OV_EFAULT);
/* codebooks */
ci->books=oggpack_read(opb,8)+1;
/*ci->book_param=_ogg_calloc(ci->books,sizeof(*ci->book_param));*/
for(i=0;i<ci->books;i++){
ci->book_param[i]=(static_codebook *)_ogg_calloc(1,sizeof(*ci->book_param[i]));
if(vorbis_staticbook_unpack(opb,ci->book_param[i]))goto err_out;
}
/* time backend settings */
ci->times=oggpack_read(opb,6)+1;
/*ci->time_type=_ogg_malloc(ci->times*sizeof(*ci->time_type));*/
/*ci->time_param=_ogg_calloc(ci->times,sizeof(void *));*/
for(i=0;i<ci->times;i++){
ci->time_type[i]=oggpack_read(opb,16);
if(ci->time_type[i]<0 || ci->time_type[i]>=VI_TIMEB)goto err_out;
/* ci->time_param[i]=_time_P[ci->time_type[i]]->unpack(vi,opb);
Vorbis I has no time backend */
/*if(!ci->time_param[i])goto err_out;*/
}
/* floor backend settings */
ci->floors=oggpack_read(opb,6)+1;
/*ci->floor_type=_ogg_malloc(ci->floors*sizeof(*ci->floor_type));*/
/*ci->floor_param=_ogg_calloc(ci->floors,sizeof(void *));*/
for(i=0;i<ci->floors;i++){
ci->floor_type[i]=oggpack_read(opb,16);
if(ci->floor_type[i]<0 || ci->floor_type[i]>=VI_FLOORB)goto err_out;
ci->floor_param[i]=_floor_P[ci->floor_type[i]]->unpack(vi,opb);
if(!ci->floor_param[i])goto err_out;
}
/* residue backend settings */
ci->residues=oggpack_read(opb,6)+1;
/*ci->residue_type=_ogg_malloc(ci->residues*sizeof(*ci->residue_type));*/
/*ci->residue_param=_ogg_calloc(ci->residues,sizeof(void *));*/
for(i=0;i<ci->residues;i++){
ci->residue_type[i]=oggpack_read(opb,16);
if(ci->residue_type[i]<0 || ci->residue_type[i]>=VI_RESB)goto err_out;
ci->residue_param[i]=_residue_P[ci->residue_type[i]]->unpack(vi,opb);
if(!ci->residue_param[i])goto err_out;
}
/* map backend settings */
ci->maps=oggpack_read(opb,6)+1;
/*ci->map_type=_ogg_malloc(ci->maps*sizeof(*ci->map_type));*/
/*ci->map_param=_ogg_calloc(ci->maps,sizeof(void *));*/
for(i=0;i<ci->maps;i++){
ci->map_type[i]=oggpack_read(opb,16);
if(ci->map_type[i]<0 || ci->map_type[i]>=VI_MAPB)goto err_out;
ci->map_param[i]=_mapping_P[ci->map_type[i]]->unpack(vi,opb);
if(!ci->map_param[i])goto err_out;
}
/* mode settings */
ci->modes=oggpack_read(opb,6)+1;
/*vi->mode_param=_ogg_calloc(vi->modes,sizeof(void *));*/
for(i=0;i<ci->modes;i++){
ci->mode_param[i]=(vorbis_info_mode *)_ogg_calloc(1,sizeof(*ci->mode_param[i]));
ci->mode_param[i]->blockflag=oggpack_read(opb,1);
ci->mode_param[i]->windowtype=oggpack_read(opb,16);
ci->mode_param[i]->transformtype=oggpack_read(opb,16);
ci->mode_param[i]->mapping=oggpack_read(opb,8);
if(ci->mode_param[i]->windowtype>=VI_WINDOWB)goto err_out;
if(ci->mode_param[i]->transformtype>=VI_WINDOWB)goto err_out;
if(ci->mode_param[i]->mapping>=ci->maps)goto err_out;
}
if(oggpack_read(opb,1)!=1)goto err_out; /* top level EOP check */
return(0);
err_out:
vorbis_info_clear(vi);
return(OV_EBADHEADER);
}
/* The Vorbis header is in three packets; the initial small packet in
the first page that identifies basic parameters, a second packet
with bitstream comments and a third packet that holds the
codebook. */
int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,ogg_packet *op){
oggpack_buffer opb;
if(op){
oggpack_readinit(&opb,op->packet);
/* Which of the three types of header is this? */
/* Also verify header-ness, vorbis */
{
char buffer[6];
int packtype=oggpack_read(&opb,8);
memset(buffer,0,6);
_v_readstring(&opb,buffer,6);
if(memcmp(buffer,"vorbis",6)){
/* not a vorbis header */
return(OV_ENOTVORBIS);
}
switch(packtype){
case 0x01: /* least significant *bit* is read first */
if(!op->b_o_s){
/* Not the initial packet */
return(OV_EBADHEADER);
}
if(vi->rate!=0){
/* previously initialized info header */
return(OV_EBADHEADER);
}
return(_vorbis_unpack_info(vi,&opb));
case 0x03: /* least significant *bit* is read first */
if(vi->rate==0){
/* um... we didn't get the initial header */
return(OV_EBADHEADER);
}
return(_vorbis_unpack_comment(vc,&opb));
case 0x05: /* least significant *bit* is read first */
if(vi->rate==0 || vc->vendor==NULL){
/* um... we didn;t get the initial header or comments yet */
return(OV_EBADHEADER);
}
return(_vorbis_unpack_books(vi,&opb));
default:
/* Not a valid vorbis header type */
return(OV_EBADHEADER);
break;
}
}
}
return(OV_EBADHEADER);
}

202
source/tremor/ivorbiscodec.h Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: libvorbis codec headers
********************************************************************/
#ifndef _vorbis_codec_h_
#define _vorbis_codec_h_
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#include "ogg.h"
typedef struct vorbis_info{
int version;
int channels;
long rate;
/* The below bitrate declarations are *hints*.
Combinations of the three values carry the following implications:
all three set to the same value:
implies a fixed rate bitstream
only nominal set:
implies a VBR stream that averages the nominal bitrate. No hard
upper/lower limit
upper and or lower set:
implies a VBR bitstream that obeys the bitrate limits. nominal
may also be set to give a nominal rate.
none set:
the coder does not care to speculate.
*/
long bitrate_upper;
long bitrate_nominal;
long bitrate_lower;
long bitrate_window;
void *codec_setup;
} vorbis_info;
/* vorbis_dsp_state buffers the current vorbis audio
analysis/synthesis state. The DSP state belongs to a specific
logical bitstream ****************************************************/
typedef struct vorbis_dsp_state{
int analysisp;
vorbis_info *vi;
ogg_int32_t **pcm;
ogg_int32_t **pcmret;
int pcm_storage;
int pcm_current;
int pcm_returned;
int preextrapolate;
int eofflag;
long lW;
long W;
long nW;
long centerW;
ogg_int64_t granulepos;
ogg_int64_t sequence;
void *backend_state;
} vorbis_dsp_state;
typedef struct vorbis_block{
/* necessary stream state for linking to the framing abstraction */
ogg_int32_t **pcm; /* this is a pointer into local storage */
oggpack_buffer opb;
long lW;
long W;
long nW;
int pcmend;
int mode;
int eofflag;
ogg_int64_t granulepos;
ogg_int64_t sequence;
vorbis_dsp_state *vd; /* For read-only access of configuration */
/* local storage to avoid remallocing; it's up to the mapping to
structure it */
void *localstore;
long localtop;
long localalloc;
long totaluse;
struct alloc_chain *reap;
} vorbis_block;
/* vorbis_block is a single block of data to be processed as part of
the analysis/synthesis stream; it belongs to a specific logical
bitstream, but is independant from other vorbis_blocks belonging to
that logical bitstream. *************************************************/
struct alloc_chain{
void *ptr;
struct alloc_chain *next;
};
/* vorbis_info contains all the setup information specific to the
specific compression/decompression mode in progress (eg,
psychoacoustic settings, channel setup, options, codebook
etc). vorbis_info and substructures are in backends.h.
*********************************************************************/
/* the comments are not part of vorbis_info so that vorbis_info can be
static storage */
typedef struct vorbis_comment{
/* unlimited user comment fields. libvorbis writes 'libvorbis'
whatever vendor is set to in encode */
char **user_comments;
int *comment_lengths;
int comments;
char *vendor;
} vorbis_comment;
/* libvorbis encodes in two abstraction layers; first we perform DSP
and produce a packet (see docs/analysis.txt). The packet is then
coded into a framed OggSquish bitstream by the second layer (see
docs/framing.txt). Decode is the reverse process; we sync/frame
the bitstream and extract individual packets, then decode the
packet back into PCM audio.
The extra framing/packetizing is used in streaming formats, such as
files. Over the net (such as with UDP), the framing and
packetization aren't necessary as they're provided by the transport
and the streaming layer is not used */
/* Vorbis PRIMITIVES: general ***************************************/
extern void vorbis_info_init(vorbis_info *vi);
extern void vorbis_info_clear(vorbis_info *vi);
extern int vorbis_info_blocksize(vorbis_info *vi,int zo);
extern void vorbis_comment_init(vorbis_comment *vc);
extern void vorbis_comment_add(vorbis_comment *vc, char *comment);
extern void vorbis_comment_add_tag(vorbis_comment *vc,
char *tag, char *contents);
extern char *vorbis_comment_query(vorbis_comment *vc, char *tag, int count);
extern int vorbis_comment_query_count(vorbis_comment *vc, char *tag);
extern void vorbis_comment_clear(vorbis_comment *vc);
extern int vorbis_block_init(vorbis_dsp_state *v, vorbis_block *vb);
extern int vorbis_block_clear(vorbis_block *vb);
extern void vorbis_dsp_clear(vorbis_dsp_state *v);
/* Vorbis PRIMITIVES: synthesis layer *******************************/
extern int vorbis_synthesis_headerin(vorbis_info *vi,vorbis_comment *vc,
ogg_packet *op);
extern int vorbis_synthesis_init(vorbis_dsp_state *v,vorbis_info *vi);
extern int vorbis_synthesis_restart(vorbis_dsp_state *v);
extern int vorbis_synthesis(vorbis_block *vb,ogg_packet *op,int decodep);
extern int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb);
extern int vorbis_synthesis_pcmout(vorbis_dsp_state *v,ogg_int32_t ***pcm);
extern int vorbis_synthesis_read(vorbis_dsp_state *v,int samples);
extern long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op);
/* Vorbis ERRORS and return codes ***********************************/
#define OV_FALSE -1
#define OV_EOF -2
#define OV_HOLE -3
#define OV_EREAD -128
#define OV_EFAULT -129
#define OV_EIMPL -130
#define OV_EINVAL -131
#define OV_ENOTVORBIS -132
#define OV_EBADHEADER -133
#define OV_EVERSION -134
#define OV_ENOTAUDIO -135
#define OV_EBADPACKET -136
#define OV_EBADLINK -137
#define OV_ENOSEEK -138
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif

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source/tremor/ivorbisfile.h Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: stdio-based convenience library for opening/seeking/decoding
********************************************************************/
#ifndef _OV_FILE_H_
#define _OV_FILE_H_
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#include <stdio.h>
#include "ivorbiscodec.h"
#define CHUNKSIZE 1024
/* The function prototypes for the callbacks are basically the same as for
* the stdio functions fread, fseek, fclose, ftell.
* The one difference is that the FILE * arguments have been replaced with
* a void * - this is to be used as a pointer to whatever internal data these
* functions might need. In the stdio case, it's just a FILE * cast to a void *
*
* If you use other functions, check the docs for these functions and return
* the right values. For seek_func(), you *MUST* return -1 if the stream is
* unseekable
*/
typedef struct {
size_t (*read_func) (void *ptr, size_t size, size_t nmemb, void *datasource);
int (*seek_func) (void *datasource, ogg_int64_t offset, int whence);
int (*close_func) (void *datasource);
long (*tell_func) (void *datasource);
} ov_callbacks;
#define NOTOPEN 0
#define PARTOPEN 1
#define OPENED 2
#define STREAMSET 3
#define INITSET 4
typedef struct OggVorbis_File {
void *datasource; /* Pointer to a FILE *, etc. */
int seekable;
ogg_int64_t offset;
ogg_int64_t end;
ogg_sync_state *oy;
/* If the FILE handle isn't seekable (eg, a pipe), only the current
stream appears */
int links;
ogg_int64_t *offsets;
ogg_int64_t *dataoffsets;
ogg_uint32_t *serialnos;
ogg_int64_t *pcmlengths;
vorbis_info *vi;
vorbis_comment *vc;
/* Decoding working state local storage */
ogg_int64_t pcm_offset;
int ready_state;
ogg_uint32_t current_serialno;
int current_link;
ogg_int64_t bittrack;
ogg_int64_t samptrack;
ogg_stream_state *os; /* take physical pages, weld into a logical
stream of packets */
vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
vorbis_block vb; /* local working space for packet->PCM decode */
ov_callbacks callbacks;
} OggVorbis_File;
extern int ov_clear(OggVorbis_File *vf);
extern int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf,
char *initial, long ibytes, ov_callbacks callbacks);
extern int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf,
char *initial, long ibytes, ov_callbacks callbacks);
extern int ov_test_open(OggVorbis_File *vf);
extern long ov_bitrate(OggVorbis_File *vf,int i);
extern long ov_bitrate_instant(OggVorbis_File *vf);
extern long ov_streams(OggVorbis_File *vf);
extern long ov_seekable(OggVorbis_File *vf);
extern long ov_serialnumber(OggVorbis_File *vf,int i);
extern ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i);
extern ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i);
extern ogg_int64_t ov_time_total(OggVorbis_File *vf,int i);
extern int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos);
extern int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos);
extern int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
extern int ov_time_seek(OggVorbis_File *vf,ogg_int64_t pos);
extern int ov_time_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
extern ogg_int64_t ov_raw_tell(OggVorbis_File *vf);
extern ogg_int64_t ov_pcm_tell(OggVorbis_File *vf);
extern ogg_int64_t ov_time_tell(OggVorbis_File *vf);
extern vorbis_info *ov_info(OggVorbis_File *vf,int link);
extern vorbis_comment *ov_comment(OggVorbis_File *vf,int link);
extern long ov_read(OggVorbis_File *vf,char *buffer,int length,
int *bitstream);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: lookup data
********************************************************************/
#ifndef _V_LOOKUP_DATA_H_
#define _V_LOOKUP_DATA_H_
#include "os_types.h"
#define FROMdB_LOOKUP_SZ 35
#define FROMdB2_LOOKUP_SZ 32
#define FROMdB_SHIFT 5
#define FROMdB2_SHIFT 3
#define FROMdB2_MASK 31
static const ogg_int32_t FROMdB_LOOKUP[FROMdB_LOOKUP_SZ]={
0x003fffff, 0x0028619b, 0x00197a96, 0x0010137a,
0x000a24b0, 0x00066666, 0x000409c3, 0x00028c42,
0x00019b8c, 0x000103ab, 0x0000a3d7, 0x00006760,
0x0000413a, 0x00002928, 0x000019f8, 0x00001062,
0x00000a56, 0x00000686, 0x0000041e, 0x00000299,
0x000001a3, 0x00000109, 0x000000a7, 0x00000069,
0x00000042, 0x0000002a, 0x0000001a, 0x00000011,
0x0000000b, 0x00000007, 0x00000004, 0x00000003,
0x00000002, 0x00000001, 0x00000001};
static const ogg_int32_t FROMdB2_LOOKUP[FROMdB2_LOOKUP_SZ]={
0x000001fc, 0x000001f5, 0x000001ee, 0x000001e7,
0x000001e0, 0x000001d9, 0x000001d2, 0x000001cc,
0x000001c5, 0x000001bf, 0x000001b8, 0x000001b2,
0x000001ac, 0x000001a6, 0x000001a0, 0x0000019a,
0x00000194, 0x0000018e, 0x00000188, 0x00000183,
0x0000017d, 0x00000178, 0x00000172, 0x0000016d,
0x00000168, 0x00000163, 0x0000015e, 0x00000159,
0x00000154, 0x0000014f, 0x0000014a, 0x00000145,
};
#define INVSQ_LOOKUP_I_SHIFT 10
#define INVSQ_LOOKUP_I_MASK 1023
static const long INVSQ_LOOKUP_I[64+1]={
92682, 91966, 91267, 90583,
89915, 89261, 88621, 87995,
87381, 86781, 86192, 85616,
85051, 84497, 83953, 83420,
82897, 82384, 81880, 81385,
80899, 80422, 79953, 79492,
79039, 78594, 78156, 77726,
77302, 76885, 76475, 76072,
75674, 75283, 74898, 74519,
74146, 73778, 73415, 73058,
72706, 72359, 72016, 71679,
71347, 71019, 70695, 70376,
70061, 69750, 69444, 69141,
68842, 68548, 68256, 67969,
67685, 67405, 67128, 66855,
66585, 66318, 66054, 65794,
65536,
};
static const long INVSQ_LOOKUP_IDel[64]={
716, 699, 684, 668,
654, 640, 626, 614,
600, 589, 576, 565,
554, 544, 533, 523,
513, 504, 495, 486,
477, 469, 461, 453,
445, 438, 430, 424,
417, 410, 403, 398,
391, 385, 379, 373,
368, 363, 357, 352,
347, 343, 337, 332,
328, 324, 319, 315,
311, 306, 303, 299,
294, 292, 287, 284,
280, 277, 273, 270,
267, 264, 260, 258,
};
#define COS_LOOKUP_I_SHIFT 9
#define COS_LOOKUP_I_MASK 511
#define COS_LOOKUP_I_SZ 128
static const ogg_int32_t COS_LOOKUP_I[COS_LOOKUP_I_SZ+1]={
16384, 16379, 16364, 16340,
16305, 16261, 16207, 16143,
16069, 15986, 15893, 15791,
15679, 15557, 15426, 15286,
15137, 14978, 14811, 14635,
14449, 14256, 14053, 13842,
13623, 13395, 13160, 12916,
12665, 12406, 12140, 11866,
11585, 11297, 11003, 10702,
10394, 10080, 9760, 9434,
9102, 8765, 8423, 8076,
7723, 7366, 7005, 6639,
6270, 5897, 5520, 5139,
4756, 4370, 3981, 3590,
3196, 2801, 2404, 2006,
1606, 1205, 804, 402,
0, -401, -803, -1204,
-1605, -2005, -2403, -2800,
-3195, -3589, -3980, -4369,
-4755, -5138, -5519, -5896,
-6269, -6638, -7004, -7365,
-7722, -8075, -8422, -8764,
-9101, -9433, -9759, -10079,
-10393, -10701, -11002, -11296,
-11584, -11865, -12139, -12405,
-12664, -12915, -13159, -13394,
-13622, -13841, -14052, -14255,
-14448, -14634, -14810, -14977,
-15136, -15285, -15425, -15556,
-15678, -15790, -15892, -15985,
-16068, -16142, -16206, -16260,
-16304, -16339, -16363, -16378,
-16383,
};
#endif

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: channel mapping 0 implementation
********************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "mdct.h"
#include "codec_internal.h"
#include "codebook.h"
#include "window.h"
#include "registry.h"
#include "misc.h"
/* simplistic, wasteful way of doing this (unique lookup for each
mode/submapping); there should be a central repository for
identical lookups. That will require minor work, so I'm putting it
off as low priority.
Why a lookup for each backend in a given mode? Because the
blocksize is set by the mode, and low backend lookups may require
parameters from other areas of the mode/mapping */
typedef struct {
vorbis_info_mode *mode;
vorbis_info_mapping0 *map;
vorbis_look_floor **floor_look;
vorbis_look_residue **residue_look;
vorbis_func_floor **floor_func;
vorbis_func_residue **residue_func;
int ch;
long lastframe; /* if a different mode is called, we need to
invalidate decay */
} vorbis_look_mapping0;
static void mapping0_free_info(vorbis_info_mapping *i){
vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
if(info){
memset(info,0,sizeof(*info));
_ogg_free(info);
}
}
static void mapping0_free_look(vorbis_look_mapping *look){
int i;
vorbis_look_mapping0 *l=(vorbis_look_mapping0 *)look;
if(l){
for(i=0;i<l->map->submaps;i++){
l->floor_func[i]->free_look(l->floor_look[i]);
l->residue_func[i]->free_look(l->residue_look[i]);
}
_ogg_free(l->floor_func);
_ogg_free(l->residue_func);
_ogg_free(l->floor_look);
_ogg_free(l->residue_look);
memset(l,0,sizeof(*l));
_ogg_free(l);
}
}
static vorbis_look_mapping *mapping0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
vorbis_info_mapping *m){
int i;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)_ogg_calloc(1,sizeof(*look));
vorbis_info_mapping0 *info=look->map=(vorbis_info_mapping0 *)m;
look->mode=vm;
look->floor_look=(vorbis_look_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_look));
look->residue_look=(vorbis_look_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_look));
look->floor_func=(vorbis_func_floor **)_ogg_calloc(info->submaps,sizeof(*look->floor_func));
look->residue_func=(vorbis_func_residue **)_ogg_calloc(info->submaps,sizeof(*look->residue_func));
for(i=0;i<info->submaps;i++){
int floornum=info->floorsubmap[i];
int resnum=info->residuesubmap[i];
look->floor_func[i]=_floor_P[ci->floor_type[floornum]];
look->floor_look[i]=look->floor_func[i]->
look(vd,vm,ci->floor_param[floornum]);
look->residue_func[i]=_residue_P[ci->residue_type[resnum]];
look->residue_look[i]=look->residue_func[i]->
look(vd,vm,ci->residue_param[resnum]);
}
look->ch=vi->channels;
return(look);
}
static int ilog(unsigned int v){
int ret=0;
if(v)--v;
while(v){
ret++;
v>>=1;
}
return(ret);
}
/* also responsible for range checking */
static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
int i;
vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)_ogg_calloc(1,sizeof(*info));
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
memset(info,0,sizeof(*info));
if(oggpack_read(opb,1))
info->submaps=oggpack_read(opb,4)+1;
else
info->submaps=1;
if(oggpack_read(opb,1)){
info->coupling_steps=oggpack_read(opb,8)+1;
for(i=0;i<info->coupling_steps;i++){
int testM=info->coupling_mag[i]=oggpack_read(opb,ilog(vi->channels));
int testA=info->coupling_ang[i]=oggpack_read(opb,ilog(vi->channels));
if(testM<0 ||
testA<0 ||
testM==testA ||
testM>=vi->channels ||
testA>=vi->channels) goto err_out;
}
}
if(oggpack_read(opb,2)>0)goto err_out; /* 2,3:reserved */
if(info->submaps>1){
for(i=0;i<vi->channels;i++){
info->chmuxlist[i]=oggpack_read(opb,4);
if(info->chmuxlist[i]>=info->submaps)goto err_out;
}
}
for(i=0;i<info->submaps;i++){
int temp=oggpack_read(opb,8);
if(temp>=ci->times)goto err_out;
info->floorsubmap[i]=oggpack_read(opb,8);
if(info->floorsubmap[i]>=ci->floors)goto err_out;
info->residuesubmap[i]=oggpack_read(opb,8);
if(info->residuesubmap[i]>=ci->residues)goto err_out;
}
return info;
err_out:
mapping0_free_info(info);
return(NULL);
}
static int seq=0;
static int mapping0_inverse(vorbis_block *vb,vorbis_look_mapping *l){
vorbis_dsp_state *vd=vb->vd;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
private_state *b=(private_state *)vd->backend_state;
vorbis_look_mapping0 *look=(vorbis_look_mapping0 *)l;
vorbis_info_mapping0 *info=look->map;
int i,j;
long n=vb->pcmend=ci->blocksizes[vb->W];
ogg_int32_t **pcmbundle=(ogg_int32_t **)alloca(sizeof(*pcmbundle)*vi->channels);
int *zerobundle=(int *)alloca(sizeof(*zerobundle)*vi->channels);
int *nonzero =(int *)alloca(sizeof(*nonzero)*vi->channels);
void **floormemo=(void **)alloca(sizeof(*floormemo)*vi->channels);
/* time domain information decode (note that applying the
information would have to happen later; we'll probably add a
function entry to the harness for that later */
/* NOT IMPLEMENTED */
/* recover the spectral envelope; store it in the PCM vector for now */
for(i=0;i<vi->channels;i++){
int submap=info->chmuxlist[i];
floormemo[i]=look->floor_func[submap]->
inverse1(vb,look->floor_look[submap]);
if(floormemo[i])
nonzero[i]=1;
else
nonzero[i]=0;
memset(vb->pcm[i],0,sizeof(*vb->pcm[i])*n/2);
}
/* channel coupling can 'dirty' the nonzero listing */
for(i=0;i<info->coupling_steps;i++){
if(nonzero[info->coupling_mag[i]] ||
nonzero[info->coupling_ang[i]]){
nonzero[info->coupling_mag[i]]=1;
nonzero[info->coupling_ang[i]]=1;
}
}
/* recover the residue into our working vectors */
for(i=0;i<info->submaps;i++){
int ch_in_bundle=0;
for(j=0;j<vi->channels;j++){
if(info->chmuxlist[j]==i){
if(nonzero[j])
zerobundle[ch_in_bundle]=1;
else
zerobundle[ch_in_bundle]=0;
pcmbundle[ch_in_bundle++]=vb->pcm[j];
}
}
look->residue_func[i]->inverse(vb,look->residue_look[i],
pcmbundle,zerobundle,ch_in_bundle);
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("coupled",seq+j,vb->pcm[j],-8,n/2,0,0);
/* channel coupling */
for(i=info->coupling_steps-1;i>=0;i--){
ogg_int32_t *pcmM=vb->pcm[info->coupling_mag[i]];
ogg_int32_t *pcmA=vb->pcm[info->coupling_ang[i]];
for(j=0;j<n/2;j++){
ogg_int32_t mag=pcmM[j];
ogg_int32_t ang=pcmA[j];
if(mag>0)
if(ang>0){
pcmM[j]=mag;
pcmA[j]=mag-ang;
}else{
pcmA[j]=mag;
pcmM[j]=mag+ang;
}
else
if(ang>0){
pcmM[j]=mag;
pcmA[j]=mag+ang;
}else{
pcmA[j]=mag;
pcmM[j]=mag-ang;
}
}
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("residue",seq+j,vb->pcm[j],-8,n/2,0,0);
/* compute and apply spectral envelope */
for(i=0;i<vi->channels;i++){
ogg_int32_t *pcm=vb->pcm[i];
int submap=info->chmuxlist[i];
look->floor_func[submap]->
inverse2(vb,look->floor_look[submap],floormemo[i],pcm);
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("mdct",seq+j,vb->pcm[j],-24,n/2,0,1);
/* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
/* only MDCT right now.... */
for(i=0;i<vi->channels;i++){
ogg_int32_t *pcm=vb->pcm[i];
mdct_backward(n,pcm,pcm);
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("imdct",seq+j,vb->pcm[j],-24,n,0,0);
/* window the data */
for(i=0;i<vi->channels;i++){
ogg_int32_t *pcm=vb->pcm[i];
if(nonzero[i])
_vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
else
for(j=0;j<n;j++)
pcm[j]=0;
}
//for(j=0;j<vi->channels;j++)
//_analysis_output("window",seq+j,vb->pcm[j],-24,n,0,0);
seq+=vi->channels;
/* all done! */
return(0);
}
/* export hooks */
vorbis_func_mapping mapping0_exportbundle={
&mapping0_unpack,
&mapping0_look,
&mapping0_free_info,
&mapping0_free_look,
&mapping0_inverse
};

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: normalized modified discrete cosine transform
power of two length transform only [64 <= n ]
last mod: $Id: mdct.c,v 1.9 2002/10/16 09:17:39 xiphmont Exp $
Original algorithm adapted long ago from _The use of multirate filter
banks for coding of high quality digital audio_, by T. Sporer,
K. Brandenburg and B. Edler, collection of the European Signal
Processing Conference (EUSIPCO), Amsterdam, June 1992, Vol.1, pp
211-214
The below code implements an algorithm that no longer looks much like
that presented in the paper, but the basic structure remains if you
dig deep enough to see it.
This module DOES NOT INCLUDE code to generate/apply the window
function. Everybody has their own weird favorite including me... I
happen to like the properties of y=sin(.5PI*sin^2(x)), but others may
vehemently disagree.
********************************************************************/
#include "ivorbiscodec.h"
#include "codebook.h"
#include "misc.h"
#include "mdct.h"
#include "mdct_lookup.h"
/* 8 point butterfly (in place) */
STIN void mdct_butterfly_8(DATA_TYPE *x){
REG_TYPE r0 = x[4] + x[0];
REG_TYPE r1 = x[4] - x[0];
REG_TYPE r2 = x[5] + x[1];
REG_TYPE r3 = x[5] - x[1];
REG_TYPE r4 = x[6] + x[2];
REG_TYPE r5 = x[6] - x[2];
REG_TYPE r6 = x[7] + x[3];
REG_TYPE r7 = x[7] - x[3];
x[0] = r5 + r3;
x[1] = r7 - r1;
x[2] = r5 - r3;
x[3] = r7 + r1;
x[4] = r4 - r0;
x[5] = r6 - r2;
x[6] = r4 + r0;
x[7] = r6 + r2;
MB();
}
/* 16 point butterfly (in place, 4 register) */
STIN void mdct_butterfly_16(DATA_TYPE *x){
REG_TYPE r0, r1;
r0 = x[ 0] - x[ 8]; x[ 8] += x[ 0];
r1 = x[ 1] - x[ 9]; x[ 9] += x[ 1];
x[ 0] = MULT31((r0 + r1) , cPI2_8);
x[ 1] = MULT31((r1 - r0) , cPI2_8);
MB();
r0 = x[10] - x[ 2]; x[10] += x[ 2];
r1 = x[ 3] - x[11]; x[11] += x[ 3];
x[ 2] = r1; x[ 3] = r0;
MB();
r0 = x[12] - x[ 4]; x[12] += x[ 4];
r1 = x[13] - x[ 5]; x[13] += x[ 5];
x[ 4] = MULT31((r0 - r1) , cPI2_8);
x[ 5] = MULT31((r0 + r1) , cPI2_8);
MB();
r0 = x[14] - x[ 6]; x[14] += x[ 6];
r1 = x[15] - x[ 7]; x[15] += x[ 7];
x[ 6] = r0; x[ 7] = r1;
MB();
mdct_butterfly_8(x);
mdct_butterfly_8(x+8);
}
/* 32 point butterfly (in place, 4 register) */
STIN void mdct_butterfly_32(DATA_TYPE *x){
REG_TYPE r0, r1;
r0 = x[30] - x[14]; x[30] += x[14];
r1 = x[31] - x[15]; x[31] += x[15];
x[14] = r0; x[15] = r1;
MB();
r0 = x[28] - x[12]; x[28] += x[12];
r1 = x[29] - x[13]; x[29] += x[13];
XNPROD31( r0, r1, cPI1_8, cPI3_8, &x[12], &x[13] );
MB();
r0 = x[26] - x[10]; x[26] += x[10];
r1 = x[27] - x[11]; x[27] += x[11];
x[10] = MULT31((r0 - r1) , cPI2_8);
x[11] = MULT31((r0 + r1) , cPI2_8);
MB();
r0 = x[24] - x[ 8]; x[24] += x[ 8];
r1 = x[25] - x[ 9]; x[25] += x[ 9];
XNPROD31( r0, r1, cPI3_8, cPI1_8, &x[ 8], &x[ 9] );
MB();
r0 = x[22] - x[ 6]; x[22] += x[ 6];
r1 = x[ 7] - x[23]; x[23] += x[ 7];
x[ 6] = r1; x[ 7] = r0;
MB();
r0 = x[ 4] - x[20]; x[20] += x[ 4];
r1 = x[ 5] - x[21]; x[21] += x[ 5];
XPROD31 ( r0, r1, cPI3_8, cPI1_8, &x[ 4], &x[ 5] );
MB();
r0 = x[ 2] - x[18]; x[18] += x[ 2];
r1 = x[ 3] - x[19]; x[19] += x[ 3];
x[ 2] = MULT31((r1 + r0) , cPI2_8);
x[ 3] = MULT31((r1 - r0) , cPI2_8);
MB();
r0 = x[ 0] - x[16]; x[16] += x[ 0];
r1 = x[ 1] - x[17]; x[17] += x[ 1];
XPROD31 ( r0, r1, cPI1_8, cPI3_8, &x[ 0], &x[ 1] );
MB();
mdct_butterfly_16(x);
mdct_butterfly_16(x+16);
}
/* N/stage point generic N stage butterfly (in place, 2 register) */
STIN void mdct_butterfly_generic(DATA_TYPE *x,int points,int step){
LOOKUP_T *T = sincos_lookup0;
DATA_TYPE *x1 = x + points - 8;
DATA_TYPE *x2 = x + (points>>1) - 8;
REG_TYPE r0;
REG_TYPE r1;
do{
r0 = x1[6] - x2[6]; x1[6] += x2[6];
r1 = x2[7] - x1[7]; x1[7] += x2[7];
XPROD31( r1, r0, T[0], T[1], &x2[6], &x2[7] ); T+=step;
r0 = x1[4] - x2[4]; x1[4] += x2[4];
r1 = x2[5] - x1[5]; x1[5] += x2[5];
XPROD31( r1, r0, T[0], T[1], &x2[4], &x2[5] ); T+=step;
r0 = x1[2] - x2[2]; x1[2] += x2[2];
r1 = x2[3] - x1[3]; x1[3] += x2[3];
XPROD31( r1, r0, T[0], T[1], &x2[2], &x2[3] ); T+=step;
r0 = x1[0] - x2[0]; x1[0] += x2[0];
r1 = x2[1] - x1[1]; x1[1] += x2[1];
XPROD31( r1, r0, T[0], T[1], &x2[0], &x2[1] ); T+=step;
x1-=8; x2-=8;
}while(T<sincos_lookup0+1024);
do{
r0 = x1[6] - x2[6]; x1[6] += x2[6];
r1 = x1[7] - x2[7]; x1[7] += x2[7];
XNPROD31( r0, r1, T[0], T[1], &x2[6], &x2[7] ); T-=step;
r0 = x1[4] - x2[4]; x1[4] += x2[4];
r1 = x1[5] - x2[5]; x1[5] += x2[5];
XNPROD31( r0, r1, T[0], T[1], &x2[4], &x2[5] ); T-=step;
r0 = x1[2] - x2[2]; x1[2] += x2[2];
r1 = x1[3] - x2[3]; x1[3] += x2[3];
XNPROD31( r0, r1, T[0], T[1], &x2[2], &x2[3] ); T-=step;
r0 = x1[0] - x2[0]; x1[0] += x2[0];
r1 = x1[1] - x2[1]; x1[1] += x2[1];
XNPROD31( r0, r1, T[0], T[1], &x2[0], &x2[1] ); T-=step;
x1-=8; x2-=8;
}while(T>sincos_lookup0);
do{
r0 = x2[6] - x1[6]; x1[6] += x2[6];
r1 = x2[7] - x1[7]; x1[7] += x2[7];
XPROD31( r0, r1, T[0], T[1], &x2[6], &x2[7] ); T+=step;
r0 = x2[4] - x1[4]; x1[4] += x2[4];
r1 = x2[5] - x1[5]; x1[5] += x2[5];
XPROD31( r0, r1, T[0], T[1], &x2[4], &x2[5] ); T+=step;
r0 = x2[2] - x1[2]; x1[2] += x2[2];
r1 = x2[3] - x1[3]; x1[3] += x2[3];
XPROD31( r0, r1, T[0], T[1], &x2[2], &x2[3] ); T+=step;
r0 = x2[0] - x1[0]; x1[0] += x2[0];
r1 = x2[1] - x1[1]; x1[1] += x2[1];
XPROD31( r0, r1, T[0], T[1], &x2[0], &x2[1] ); T+=step;
x1-=8; x2-=8;
}while(T<sincos_lookup0+1024);
do{
r0 = x1[6] - x2[6]; x1[6] += x2[6];
r1 = x2[7] - x1[7]; x1[7] += x2[7];
XNPROD31( r1, r0, T[0], T[1], &x2[6], &x2[7] ); T-=step;
r0 = x1[4] - x2[4]; x1[4] += x2[4];
r1 = x2[5] - x1[5]; x1[5] += x2[5];
XNPROD31( r1, r0, T[0], T[1], &x2[4], &x2[5] ); T-=step;
r0 = x1[2] - x2[2]; x1[2] += x2[2];
r1 = x2[3] - x1[3]; x1[3] += x2[3];
XNPROD31( r1, r0, T[0], T[1], &x2[2], &x2[3] ); T-=step;
r0 = x1[0] - x2[0]; x1[0] += x2[0];
r1 = x2[1] - x1[1]; x1[1] += x2[1];
XNPROD31( r1, r0, T[0], T[1], &x2[0], &x2[1] ); T-=step;
x1-=8; x2-=8;
}while(T>sincos_lookup0);
}
STIN void mdct_butterflies(DATA_TYPE *x,int points,int shift){
int stages=8-shift;
int i,j;
for(i=0;--stages>0;i++){
for(j=0;j<(1<<i);j++)
mdct_butterfly_generic(x+(points>>i)*j,points>>i,4<<(i+shift));
}
for(j=0;j<points;j+=32)
mdct_butterfly_32(x+j);
}
static unsigned char bitrev[16]={0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15};
STIN int bitrev12(int x){
return bitrev[x>>8]|(bitrev[(x&0x0f0)>>4]<<4)|(((int)bitrev[x&0x00f])<<8);
}
STIN void mdct_bitreverse(DATA_TYPE *x,int n,int step,int shift){
int bit = 0;
DATA_TYPE *w0 = x;
DATA_TYPE *w1 = x = w0+(n>>1);
LOOKUP_T *T = (step>=4)?(sincos_lookup0+(step>>1)):sincos_lookup1;
LOOKUP_T *Ttop = T+1024;
DATA_TYPE r2;
do{
DATA_TYPE r3 = bitrev12(bit++);
DATA_TYPE *x0 = x + ((r3 ^ 0xfff)>>shift) -1;
DATA_TYPE *x1 = x + (r3>>shift);
REG_TYPE r0 = x0[0] + x1[0];
REG_TYPE r1 = x1[1] - x0[1];
XPROD32( r0, r1, T[1], T[0], &r2, &r3 ); T+=step;
w1 -= 4;
r0 = (x0[1] + x1[1])>>1;
r1 = (x0[0] - x1[0])>>1;
w0[0] = r0 + r2;
w0[1] = r1 + r3;
w1[2] = r0 - r2;
w1[3] = r3 - r1;
r3 = bitrev12(bit++);
x0 = x + ((r3 ^ 0xfff)>>shift) -1;
x1 = x + (r3>>shift);
r0 = x0[0] + x1[0];
r1 = x1[1] - x0[1];
XPROD32( r0, r1, T[1], T[0], &r2, &r3 ); T+=step;
r0 = (x0[1] + x1[1])>>1;
r1 = (x0[0] - x1[0])>>1;
w0[2] = r0 + r2;
w0[3] = r1 + r3;
w1[0] = r0 - r2;
w1[1] = r3 - r1;
w0 += 4;
}while(T<Ttop);
do{
DATA_TYPE r3 = bitrev12(bit++);
DATA_TYPE *x0 = x + ((r3 ^ 0xfff)>>shift) -1;
DATA_TYPE *x1 = x + (r3>>shift);
REG_TYPE r0 = x0[0] + x1[0];
REG_TYPE r1 = x1[1] - x0[1];
T-=step; XPROD32( r0, r1, T[0], T[1], &r2, &r3 );
w1 -= 4;
r0 = (x0[1] + x1[1])>>1;
r1 = (x0[0] - x1[0])>>1;
w0[0] = r0 + r2;
w0[1] = r1 + r3;
w1[2] = r0 - r2;
w1[3] = r3 - r1;
r3 = bitrev12(bit++);
x0 = x + ((r3 ^ 0xfff)>>shift) -1;
x1 = x + (r3>>shift);
r0 = x0[0] + x1[0];
r1 = x1[1] - x0[1];
T-=step; XPROD32( r0, r1, T[0], T[1], &r2, &r3 );
r0 = (x0[1] + x1[1])>>1;
r1 = (x0[0] - x1[0])>>1;
w0[2] = r0 + r2;
w0[3] = r1 + r3;
w1[0] = r0 - r2;
w1[1] = r3 - r1;
w0 += 4;
}while(w0<w1);
}
void mdct_backward(int n, DATA_TYPE *in, DATA_TYPE *out){
int n2=n>>1;
int n4=n>>2;
DATA_TYPE *iX;
DATA_TYPE *oX;
LOOKUP_T *T;
LOOKUP_T *V;
int shift;
int step;
for (shift=6;!(n&(1<<shift));shift++);
shift=13-shift;
step=2<<shift;
/* rotate */
iX = in+n2-7;
oX = out+n2+n4;
T = sincos_lookup0;
do{
oX-=4;
XPROD31( iX[4], iX[6], T[0], T[1], &oX[2], &oX[3] ); T+=step;
XPROD31( iX[0], iX[2], T[0], T[1], &oX[0], &oX[1] ); T+=step;
iX-=8;
}while(iX>=in+n4);
do{
oX-=4;
XPROD31( iX[4], iX[6], T[1], T[0], &oX[2], &oX[3] ); T-=step;
XPROD31( iX[0], iX[2], T[1], T[0], &oX[0], &oX[1] ); T-=step;
iX-=8;
}while(iX>=in);
iX = in+n2-8;
oX = out+n2+n4;
T = sincos_lookup0;
do{
T+=step; XNPROD31( iX[6], iX[4], T[0], T[1], &oX[0], &oX[1] );
T+=step; XNPROD31( iX[2], iX[0], T[0], T[1], &oX[2], &oX[3] );
iX-=8;
oX+=4;
}while(iX>=in+n4);
do{
T-=step; XNPROD31( iX[6], iX[4], T[1], T[0], &oX[0], &oX[1] );
T-=step; XNPROD31( iX[2], iX[0], T[1], T[0], &oX[2], &oX[3] );
iX-=8;
oX+=4;
}while(iX>=in);
mdct_butterflies(out+n2,n2,shift);
mdct_bitreverse(out,n,step,shift);
/* rotate + window */
step>>=2;
{
DATA_TYPE *oX1=out+n2+n4;
DATA_TYPE *oX2=out+n2+n4;
DATA_TYPE *iX =out;
switch(step) {
default: {
T=(step>=4)?(sincos_lookup0+(step>>1)):sincos_lookup1;
do{
oX1-=4;
XPROD31( iX[0], -iX[1], T[0], T[1], &oX1[3], &oX2[0] ); T+=step;
XPROD31( iX[2], -iX[3], T[0], T[1], &oX1[2], &oX2[1] ); T+=step;
XPROD31( iX[4], -iX[5], T[0], T[1], &oX1[1], &oX2[2] ); T+=step;
XPROD31( iX[6], -iX[7], T[0], T[1], &oX1[0], &oX2[3] ); T+=step;
oX2+=4;
iX+=8;
}while(iX<oX1);
break;
}
case 1: {
/* linear interpolation between table values: offset=0.5, step=1 */
REG_TYPE t0,t1,v0,v1;
T = sincos_lookup0;
V = sincos_lookup1;
t0 = (*T++)>>1;
t1 = (*T++)>>1;
do{
oX1-=4;
t0 += (v0 = (*V++)>>1);
t1 += (v1 = (*V++)>>1);
XPROD31( iX[0], -iX[1], t0, t1, &oX1[3], &oX2[0] );
v0 += (t0 = (*T++)>>1);
v1 += (t1 = (*T++)>>1);
XPROD31( iX[2], -iX[3], v0, v1, &oX1[2], &oX2[1] );
t0 += (v0 = (*V++)>>1);
t1 += (v1 = (*V++)>>1);
XPROD31( iX[4], -iX[5], t0, t1, &oX1[1], &oX2[2] );
v0 += (t0 = (*T++)>>1);
v1 += (t1 = (*T++)>>1);
XPROD31( iX[6], -iX[7], v0, v1, &oX1[0], &oX2[3] );
oX2+=4;
iX+=8;
}while(iX<oX1);
break;
}
case 0: {
/* linear interpolation between table values: offset=0.25, step=0.5 */
REG_TYPE t0,t1,v0,v1,q0,q1;
T = sincos_lookup0;
V = sincos_lookup1;
t0 = *T++;
t1 = *T++;
do{
oX1-=4;
v0 = *V++;
v1 = *V++;
t0 += (q0 = (v0-t0)>>2);
t1 += (q1 = (v1-t1)>>2);
XPROD31( iX[0], -iX[1], t0, t1, &oX1[3], &oX2[0] );
t0 = v0-q0;
t1 = v1-q1;
XPROD31( iX[2], -iX[3], t0, t1, &oX1[2], &oX2[1] );
t0 = *T++;
t1 = *T++;
v0 += (q0 = (t0-v0)>>2);
v1 += (q1 = (t1-v1)>>2);
XPROD31( iX[4], -iX[5], v0, v1, &oX1[1], &oX2[2] );
v0 = t0-q0;
v1 = t1-q1;
XPROD31( iX[6], -iX[7], v0, v1, &oX1[0], &oX2[3] );
oX2+=4;
iX+=8;
}while(iX<oX1);
break;
}
}
iX=out+n2+n4;
oX1=out+n4;
oX2=oX1;
do{
oX1-=4;
iX-=4;
oX2[0] = -(oX1[3] = iX[3]);
oX2[1] = -(oX1[2] = iX[2]);
oX2[2] = -(oX1[1] = iX[1]);
oX2[3] = -(oX1[0] = iX[0]);
oX2+=4;
}while(oX2<iX);
iX=out+n2+n4;
oX1=out+n2+n4;
oX2=out+n2;
do{
oX1-=4;
oX1[0]= iX[3];
oX1[1]= iX[2];
oX1[2]= iX[1];
oX1[3]= iX[0];
iX+=4;
}while(oX1>oX2);
}
}

52
source/tremor/mdct.h Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: modified discrete cosine transform prototypes
********************************************************************/
#ifndef _OGG_mdct_H_
#define _OGG_mdct_H_
#include "ivorbiscodec.h"
#include "misc.h"
#define DATA_TYPE ogg_int32_t
#define REG_TYPE register ogg_int32_t
#ifdef _LOW_ACCURACY_
#define cPI3_8 (0x0062)
#define cPI2_8 (0x00b5)
#define cPI1_8 (0x00ed)
#else
#define cPI3_8 (0x30fbc54d)
#define cPI2_8 (0x5a82799a)
#define cPI1_8 (0x7641af3d)
#endif
extern void mdct_forward(int n, DATA_TYPE *in, DATA_TYPE *out);
extern void mdct_backward(int n, DATA_TYPE *in, DATA_TYPE *out);
#endif

540
source/tremor/mdct_lookup.h Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: sin,cos lookup tables
********************************************************************/
#include "os_types.h"
/* {sin(2*i*PI/4096), cos(2*i*PI/4096)}, with i = 0 to 512 */
static LOOKUP_T sincos_lookup0[1026] = {
X(0x00000000), X(0x7fffffff), X(0x003243f5), X(0x7ffff621),
X(0x006487e3), X(0x7fffd886), X(0x0096cbc1), X(0x7fffa72c),
X(0x00c90f88), X(0x7fff6216), X(0x00fb5330), X(0x7fff0943),
X(0x012d96b1), X(0x7ffe9cb2), X(0x015fda03), X(0x7ffe1c65),
X(0x01921d20), X(0x7ffd885a), X(0x01c45ffe), X(0x7ffce093),
X(0x01f6a297), X(0x7ffc250f), X(0x0228e4e2), X(0x7ffb55ce),
X(0x025b26d7), X(0x7ffa72d1), X(0x028d6870), X(0x7ff97c18),
X(0x02bfa9a4), X(0x7ff871a2), X(0x02f1ea6c), X(0x7ff75370),
X(0x03242abf), X(0x7ff62182), X(0x03566a96), X(0x7ff4dbd9),
X(0x0388a9ea), X(0x7ff38274), X(0x03bae8b2), X(0x7ff21553),
X(0x03ed26e6), X(0x7ff09478), X(0x041f6480), X(0x7feeffe1),
X(0x0451a177), X(0x7fed5791), X(0x0483ddc3), X(0x7feb9b85),
X(0x04b6195d), X(0x7fe9cbc0), X(0x04e8543e), X(0x7fe7e841),
X(0x051a8e5c), X(0x7fe5f108), X(0x054cc7b1), X(0x7fe3e616),
X(0x057f0035), X(0x7fe1c76b), X(0x05b137df), X(0x7fdf9508),
X(0x05e36ea9), X(0x7fdd4eec), X(0x0615a48b), X(0x7fdaf519),
X(0x0647d97c), X(0x7fd8878e), X(0x067a0d76), X(0x7fd6064c),
X(0x06ac406f), X(0x7fd37153), X(0x06de7262), X(0x7fd0c8a3),
X(0x0710a345), X(0x7fce0c3e), X(0x0742d311), X(0x7fcb3c23),
X(0x077501be), X(0x7fc85854), X(0x07a72f45), X(0x7fc560cf),
X(0x07d95b9e), X(0x7fc25596), X(0x080b86c2), X(0x7fbf36aa),
X(0x083db0a7), X(0x7fbc040a), X(0x086fd947), X(0x7fb8bdb8),
X(0x08a2009a), X(0x7fb563b3), X(0x08d42699), X(0x7fb1f5fc),
X(0x09064b3a), X(0x7fae7495), X(0x09386e78), X(0x7faadf7c),
X(0x096a9049), X(0x7fa736b4), X(0x099cb0a7), X(0x7fa37a3c),
X(0x09cecf89), X(0x7f9faa15), X(0x0a00ece8), X(0x7f9bc640),
X(0x0a3308bd), X(0x7f97cebd), X(0x0a6522fe), X(0x7f93c38c),
X(0x0a973ba5), X(0x7f8fa4b0), X(0x0ac952aa), X(0x7f8b7227),
X(0x0afb6805), X(0x7f872bf3), X(0x0b2d7baf), X(0x7f82d214),
X(0x0b5f8d9f), X(0x7f7e648c), X(0x0b919dcf), X(0x7f79e35a),
X(0x0bc3ac35), X(0x7f754e80), X(0x0bf5b8cb), X(0x7f70a5fe),
X(0x0c27c389), X(0x7f6be9d4), X(0x0c59cc68), X(0x7f671a05),
X(0x0c8bd35e), X(0x7f62368f), X(0x0cbdd865), X(0x7f5d3f75),
X(0x0cefdb76), X(0x7f5834b7), X(0x0d21dc87), X(0x7f531655),
X(0x0d53db92), X(0x7f4de451), X(0x0d85d88f), X(0x7f489eaa),
X(0x0db7d376), X(0x7f434563), X(0x0de9cc40), X(0x7f3dd87c),
X(0x0e1bc2e4), X(0x7f3857f6), X(0x0e4db75b), X(0x7f32c3d1),
X(0x0e7fa99e), X(0x7f2d1c0e), X(0x0eb199a4), X(0x7f2760af),
X(0x0ee38766), X(0x7f2191b4), X(0x0f1572dc), X(0x7f1baf1e),
X(0x0f475bff), X(0x7f15b8ee), X(0x0f7942c7), X(0x7f0faf25),
X(0x0fab272b), X(0x7f0991c4), X(0x0fdd0926), X(0x7f0360cb),
X(0x100ee8ad), X(0x7efd1c3c), X(0x1040c5bb), X(0x7ef6c418),
X(0x1072a048), X(0x7ef05860), X(0x10a4784b), X(0x7ee9d914),
X(0x10d64dbd), X(0x7ee34636), X(0x11082096), X(0x7edc9fc6),
X(0x1139f0cf), X(0x7ed5e5c6), X(0x116bbe60), X(0x7ecf1837),
X(0x119d8941), X(0x7ec8371a), X(0x11cf516a), X(0x7ec14270),
X(0x120116d5), X(0x7eba3a39), X(0x1232d979), X(0x7eb31e78),
X(0x1264994e), X(0x7eabef2c), X(0x1296564d), X(0x7ea4ac58),
X(0x12c8106f), X(0x7e9d55fc), X(0x12f9c7aa), X(0x7e95ec1a),
X(0x132b7bf9), X(0x7e8e6eb2), X(0x135d2d53), X(0x7e86ddc6),
X(0x138edbb1), X(0x7e7f3957), X(0x13c0870a), X(0x7e778166),
X(0x13f22f58), X(0x7e6fb5f4), X(0x1423d492), X(0x7e67d703),
X(0x145576b1), X(0x7e5fe493), X(0x148715ae), X(0x7e57dea7),
X(0x14b8b17f), X(0x7e4fc53e), X(0x14ea4a1f), X(0x7e47985b),
X(0x151bdf86), X(0x7e3f57ff), X(0x154d71aa), X(0x7e37042a),
X(0x157f0086), X(0x7e2e9cdf), X(0x15b08c12), X(0x7e26221f),
X(0x15e21445), X(0x7e1d93ea), X(0x16139918), X(0x7e14f242),
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X(0x16a81305), X(0x7dfa98a8), X(0x16d98a0c), X(0x7df1a942),
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X(0x59646498), X(0x5b9d1154), X(0x598857b2), X(0x5b79ef96),
X(0x59ac3cfd), X(0x5b56bfbd), X(0x59d01475), X(0x5b3381ce),
X(0x59f3de12), X(0x5b1035cf), X(0x5a1799d1), X(0x5aecdbc5),
X(0x5a3b47ab), X(0x5ac973b5), X(0x5a5ee79a), X(0x5aa5fda5),
X(0x5a82799a), X(0x5a82799a)
};
/* {sin((2*i+1)*PI/4096), cos((2*i+1)*PI/4096)}, with i = 0 to 511 */
static LOOKUP_T sincos_lookup1[1024] = {
X(0x001921fb), X(0x7ffffd88), X(0x004b65ee), X(0x7fffe9cb),
X(0x007da9d4), X(0x7fffc251), X(0x00afeda8), X(0x7fff8719),
X(0x00e23160), X(0x7fff3824), X(0x011474f6), X(0x7ffed572),
X(0x0146b860), X(0x7ffe5f03), X(0x0178fb99), X(0x7ffdd4d7),
X(0x01ab3e97), X(0x7ffd36ee), X(0x01dd8154), X(0x7ffc8549),
X(0x020fc3c6), X(0x7ffbbfe6), X(0x024205e8), X(0x7ffae6c7),
X(0x027447b0), X(0x7ff9f9ec), X(0x02a68917), X(0x7ff8f954),
X(0x02d8ca16), X(0x7ff7e500), X(0x030b0aa4), X(0x7ff6bcf0),
X(0x033d4abb), X(0x7ff58125), X(0x036f8a51), X(0x7ff4319d),
X(0x03a1c960), X(0x7ff2ce5b), X(0x03d407df), X(0x7ff1575d),
X(0x040645c7), X(0x7fefcca4), X(0x04388310), X(0x7fee2e30),
X(0x046abfb3), X(0x7fec7c02), X(0x049cfba7), X(0x7feab61a),
X(0x04cf36e5), X(0x7fe8dc78), X(0x05017165), X(0x7fe6ef1c),
X(0x0533ab20), X(0x7fe4ee06), X(0x0565e40d), X(0x7fe2d938),
X(0x05981c26), X(0x7fe0b0b1), X(0x05ca5361), X(0x7fde7471),
X(0x05fc89b8), X(0x7fdc247a), X(0x062ebf22), X(0x7fd9c0ca),
X(0x0660f398), X(0x7fd74964), X(0x06932713), X(0x7fd4be46),
X(0x06c5598a), X(0x7fd21f72), X(0x06f78af6), X(0x7fcf6ce8),
X(0x0729bb4e), X(0x7fcca6a7), X(0x075bea8c), X(0x7fc9ccb2),
X(0x078e18a7), X(0x7fc6df08), X(0x07c04598), X(0x7fc3dda9),
X(0x07f27157), X(0x7fc0c896), X(0x08249bdd), X(0x7fbd9fd0),
X(0x0856c520), X(0x7fba6357), X(0x0888ed1b), X(0x7fb7132b),
X(0x08bb13c5), X(0x7fb3af4e), X(0x08ed3916), X(0x7fb037bf),
X(0x091f5d06), X(0x7facac7f), X(0x09517f8f), X(0x7fa90d8e),
X(0x0983a0a7), X(0x7fa55aee), X(0x09b5c048), X(0x7fa1949e),
X(0x09e7de6a), X(0x7f9dbaa0), X(0x0a19fb04), X(0x7f99ccf4),
X(0x0a4c1610), X(0x7f95cb9a), X(0x0a7e2f85), X(0x7f91b694),
X(0x0ab0475c), X(0x7f8d8de1), X(0x0ae25d8d), X(0x7f895182),
X(0x0b147211), X(0x7f850179), X(0x0b4684df), X(0x7f809dc5),
X(0x0b7895f0), X(0x7f7c2668), X(0x0baaa53b), X(0x7f779b62),
X(0x0bdcb2bb), X(0x7f72fcb4), X(0x0c0ebe66), X(0x7f6e4a5e),
X(0x0c40c835), X(0x7f698461), X(0x0c72d020), X(0x7f64aabf),
X(0x0ca4d620), X(0x7f5fbd77), X(0x0cd6da2d), X(0x7f5abc8a),
X(0x0d08dc3f), X(0x7f55a7fa), X(0x0d3adc4e), X(0x7f507fc7),
X(0x0d6cda53), X(0x7f4b43f2), X(0x0d9ed646), X(0x7f45f47b),
X(0x0dd0d01f), X(0x7f409164), X(0x0e02c7d7), X(0x7f3b1aad),
X(0x0e34bd66), X(0x7f359057), X(0x0e66b0c3), X(0x7f2ff263),
X(0x0e98a1e9), X(0x7f2a40d2), X(0x0eca90ce), X(0x7f247ba5),
X(0x0efc7d6b), X(0x7f1ea2dc), X(0x0f2e67b8), X(0x7f18b679),
X(0x0f604faf), X(0x7f12b67c), X(0x0f923546), X(0x7f0ca2e7),
X(0x0fc41876), X(0x7f067bba), X(0x0ff5f938), X(0x7f0040f6),
X(0x1027d784), X(0x7ef9f29d), X(0x1059b352), X(0x7ef390ae),
X(0x108b8c9b), X(0x7eed1b2c), X(0x10bd6356), X(0x7ee69217),
X(0x10ef377d), X(0x7edff570), X(0x11210907), X(0x7ed94538),
X(0x1152d7ed), X(0x7ed28171), X(0x1184a427), X(0x7ecbaa1a),
X(0x11b66dad), X(0x7ec4bf36), X(0x11e83478), X(0x7ebdc0c6),
X(0x1219f880), X(0x7eb6aeca), X(0x124bb9be), X(0x7eaf8943),
X(0x127d7829), X(0x7ea85033), X(0x12af33ba), X(0x7ea1039b),
X(0x12e0ec6a), X(0x7e99a37c), X(0x1312a230), X(0x7e922fd6),
X(0x13445505), X(0x7e8aa8ac), X(0x137604e2), X(0x7e830dff),
X(0x13a7b1bf), X(0x7e7b5fce), X(0x13d95b93), X(0x7e739e1d),
X(0x140b0258), X(0x7e6bc8eb), X(0x143ca605), X(0x7e63e03b),
X(0x146e4694), X(0x7e5be40c), X(0x149fe3fc), X(0x7e53d462),
X(0x14d17e36), X(0x7e4bb13c), X(0x1503153a), X(0x7e437a9c),
X(0x1534a901), X(0x7e3b3083), X(0x15663982), X(0x7e32d2f4),
X(0x1597c6b7), X(0x7e2a61ed), X(0x15c95097), X(0x7e21dd73),
X(0x15fad71b), X(0x7e194584), X(0x162c5a3b), X(0x7e109a24),
X(0x165dd9f0), X(0x7e07db52), X(0x168f5632), X(0x7dff0911),
X(0x16c0cef9), X(0x7df62362), X(0x16f2443e), X(0x7ded2a47),
X(0x1723b5f9), X(0x7de41dc0), X(0x17552422), X(0x7ddafdce),
X(0x17868eb3), X(0x7dd1ca75), X(0x17b7f5a3), X(0x7dc883b4),
X(0x17e958ea), X(0x7dbf298d), X(0x181ab881), X(0x7db5bc02),
X(0x184c1461), X(0x7dac3b15), X(0x187d6c82), X(0x7da2a6c6),
X(0x18aec0db), X(0x7d98ff17), X(0x18e01167), X(0x7d8f4409),
X(0x19115e1c), X(0x7d85759f), X(0x1942a6f3), X(0x7d7b93da),
X(0x1973ebe6), X(0x7d719eba), X(0x19a52ceb), X(0x7d679642),
X(0x19d669fc), X(0x7d5d7a74), X(0x1a07a311), X(0x7d534b50),
X(0x1a38d823), X(0x7d4908d9), X(0x1a6a0929), X(0x7d3eb30f),
X(0x1a9b361d), X(0x7d3449f5), X(0x1acc5ef6), X(0x7d29cd8c),
X(0x1afd83ad), X(0x7d1f3dd6), X(0x1b2ea43a), X(0x7d149ad5),
X(0x1b5fc097), X(0x7d09e489), X(0x1b90d8bb), X(0x7cff1af5),
X(0x1bc1ec9e), X(0x7cf43e1a), X(0x1bf2fc3a), X(0x7ce94dfb),
X(0x1c240786), X(0x7cde4a98), X(0x1c550e7c), X(0x7cd333f3),
X(0x1c861113), X(0x7cc80a0f), X(0x1cb70f43), X(0x7cbcccec),
X(0x1ce80906), X(0x7cb17c8d), X(0x1d18fe54), X(0x7ca618f3),
X(0x1d49ef26), X(0x7c9aa221), X(0x1d7adb73), X(0x7c8f1817),
X(0x1dabc334), X(0x7c837ad8), X(0x1ddca662), X(0x7c77ca65),
X(0x1e0d84f5), X(0x7c6c06c0), X(0x1e3e5ee5), X(0x7c602fec),
X(0x1e6f342c), X(0x7c5445e9), X(0x1ea004c1), X(0x7c4848ba),
X(0x1ed0d09d), X(0x7c3c3860), X(0x1f0197b8), X(0x7c3014de),
X(0x1f325a0b), X(0x7c23de35), X(0x1f63178f), X(0x7c179467),
X(0x1f93d03c), X(0x7c0b3777), X(0x1fc4840a), X(0x7bfec765),
X(0x1ff532f2), X(0x7bf24434), X(0x2025dcec), X(0x7be5ade6),
X(0x205681f1), X(0x7bd9047c), X(0x208721f9), X(0x7bcc47fa),
X(0x20b7bcfe), X(0x7bbf7860), X(0x20e852f6), X(0x7bb295b0),
X(0x2118e3dc), X(0x7ba59fee), X(0x21496fa7), X(0x7b989719),
X(0x2179f64f), X(0x7b8b7b36), X(0x21aa77cf), X(0x7b7e4c45),
X(0x21daf41d), X(0x7b710a49), X(0x220b6b32), X(0x7b63b543),
X(0x223bdd08), X(0x7b564d36), X(0x226c4996), X(0x7b48d225),
X(0x229cb0d5), X(0x7b3b4410), X(0x22cd12bd), X(0x7b2da2fa),
X(0x22fd6f48), X(0x7b1feee5), X(0x232dc66d), X(0x7b1227d3),
X(0x235e1826), X(0x7b044dc7), X(0x238e646a), X(0x7af660c2),
X(0x23beab33), X(0x7ae860c7), X(0x23eeec78), X(0x7ada4dd8),
X(0x241f2833), X(0x7acc27f7), X(0x244f5e5c), X(0x7abdef25),
X(0x247f8eec), X(0x7aafa367), X(0x24afb9da), X(0x7aa144bc),
X(0x24dfdf20), X(0x7a92d329), X(0x250ffeb7), X(0x7a844eae),
X(0x25401896), X(0x7a75b74f), X(0x25702cb7), X(0x7a670d0d),
X(0x25a03b11), X(0x7a584feb), X(0x25d0439f), X(0x7a497feb),
X(0x26004657), X(0x7a3a9d0f), X(0x26304333), X(0x7a2ba75a),
X(0x26603a2c), X(0x7a1c9ece), X(0x26902b39), X(0x7a0d836d),
X(0x26c01655), X(0x79fe5539), X(0x26effb76), X(0x79ef1436),
X(0x271fda96), X(0x79dfc064), X(0x274fb3ae), X(0x79d059c8),
X(0x277f86b5), X(0x79c0e062), X(0x27af53a6), X(0x79b15435),
X(0x27df1a77), X(0x79a1b545), X(0x280edb23), X(0x79920392),
X(0x283e95a1), X(0x79823f20), X(0x286e49ea), X(0x797267f2),
X(0x289df7f8), X(0x79627e08), X(0x28cd9fc1), X(0x79528167),
X(0x28fd4140), X(0x79427210), X(0x292cdc6d), X(0x79325006),
X(0x295c7140), X(0x79221b4b), X(0x298bffb2), X(0x7911d3e2),
X(0x29bb87bc), X(0x790179cd), X(0x29eb0957), X(0x78f10d0f),
X(0x2a1a847b), X(0x78e08dab), X(0x2a49f920), X(0x78cffba3),
X(0x2a796740), X(0x78bf56f9), X(0x2aa8ced3), X(0x78ae9fb0),
X(0x2ad82fd2), X(0x789dd5cb), X(0x2b078a36), X(0x788cf94c),
X(0x2b36ddf7), X(0x787c0a36), X(0x2b662b0e), X(0x786b088c),
X(0x2b957173), X(0x7859f44f), X(0x2bc4b120), X(0x7848cd83),
X(0x2bf3ea0d), X(0x7837942b), X(0x2c231c33), X(0x78264849),
X(0x2c52478a), X(0x7814e9df), X(0x2c816c0c), X(0x780378f1),
X(0x2cb089b1), X(0x77f1f581), X(0x2cdfa071), X(0x77e05f91),
X(0x2d0eb046), X(0x77ceb725), X(0x2d3db928), X(0x77bcfc3f),
X(0x2d6cbb10), X(0x77ab2ee2), X(0x2d9bb5f6), X(0x77994f11),
X(0x2dcaa9d5), X(0x77875cce), X(0x2df996a3), X(0x7775581d),
X(0x2e287c5a), X(0x776340ff), X(0x2e575af3), X(0x77511778),
X(0x2e863267), X(0x773edb8b), X(0x2eb502ae), X(0x772c8d3a),
X(0x2ee3cbc1), X(0x771a2c88), X(0x2f128d99), X(0x7707b979),
X(0x2f41482e), X(0x76f5340e), X(0x2f6ffb7a), X(0x76e29c4b),
X(0x2f9ea775), X(0x76cff232), X(0x2fcd4c19), X(0x76bd35c7),
X(0x2ffbe95d), X(0x76aa670d), X(0x302a7f3a), X(0x76978605),
X(0x30590dab), X(0x768492b4), X(0x308794a6), X(0x76718d1c),
X(0x30b61426), X(0x765e7540), X(0x30e48c22), X(0x764b4b23),
X(0x3112fc95), X(0x76380ec8), X(0x31416576), X(0x7624c031),
X(0x316fc6be), X(0x76115f63), X(0x319e2067), X(0x75fdec60),
X(0x31cc7269), X(0x75ea672a), X(0x31fabcbd), X(0x75d6cfc5),
X(0x3228ff5c), X(0x75c32634), X(0x32573a3f), X(0x75af6a7b),
X(0x32856d5e), X(0x759b9c9b), X(0x32b398b3), X(0x7587bc98),
X(0x32e1bc36), X(0x7573ca75), X(0x330fd7e1), X(0x755fc635),
X(0x333debab), X(0x754bafdc), X(0x336bf78f), X(0x7537876c),
X(0x3399fb85), X(0x75234ce8), X(0x33c7f785), X(0x750f0054),
X(0x33f5eb89), X(0x74faa1b3), X(0x3423d78a), X(0x74e63108),
X(0x3451bb81), X(0x74d1ae55), X(0x347f9766), X(0x74bd199f),
X(0x34ad6b32), X(0x74a872e8), X(0x34db36df), X(0x7493ba34),
X(0x3508fa66), X(0x747eef85), X(0x3536b5be), X(0x746a12df),
X(0x356468e2), X(0x74552446), X(0x359213c9), X(0x744023bc),
X(0x35bfb66e), X(0x742b1144), X(0x35ed50c9), X(0x7415ece2),
X(0x361ae2d3), X(0x7400b69a), X(0x36486c86), X(0x73eb6e6e),
X(0x3675edd9), X(0x73d61461), X(0x36a366c6), X(0x73c0a878),
X(0x36d0d746), X(0x73ab2ab4), X(0x36fe3f52), X(0x73959b1b),
X(0x372b9ee3), X(0x737ff9ae), X(0x3758f5f2), X(0x736a4671),
X(0x37864477), X(0x73548168), X(0x37b38a6d), X(0x733eaa96),
X(0x37e0c7cc), X(0x7328c1ff), X(0x380dfc8d), X(0x7312c7a5),
X(0x383b28a9), X(0x72fcbb8c), X(0x38684c19), X(0x72e69db7),
X(0x389566d6), X(0x72d06e2b), X(0x38c278d9), X(0x72ba2cea),
X(0x38ef821c), X(0x72a3d9f7), X(0x391c8297), X(0x728d7557),
X(0x39497a43), X(0x7276ff0d), X(0x39766919), X(0x7260771b),
X(0x39a34f13), X(0x7249dd86), X(0x39d02c2a), X(0x72333251),
X(0x39fd0056), X(0x721c7580), X(0x3a29cb91), X(0x7205a716),
X(0x3a568dd4), X(0x71eec716), X(0x3a834717), X(0x71d7d585),
X(0x3aaff755), X(0x71c0d265), X(0x3adc9e86), X(0x71a9bdba),
X(0x3b093ca3), X(0x71929789), X(0x3b35d1a5), X(0x717b5fd3),
X(0x3b625d86), X(0x7164169d), X(0x3b8ee03e), X(0x714cbbeb),
X(0x3bbb59c7), X(0x71354fc0), X(0x3be7ca1a), X(0x711dd220),
X(0x3c143130), X(0x7106430e), X(0x3c408f03), X(0x70eea28e),
X(0x3c6ce38a), X(0x70d6f0a4), X(0x3c992ec0), X(0x70bf2d53),
X(0x3cc5709e), X(0x70a7589f), X(0x3cf1a91c), X(0x708f728b),
X(0x3d1dd835), X(0x70777b1c), X(0x3d49fde1), X(0x705f7255),
X(0x3d761a19), X(0x70475839), X(0x3da22cd7), X(0x702f2ccd),
X(0x3dce3614), X(0x7016f014), X(0x3dfa35c8), X(0x6ffea212),
X(0x3e262bee), X(0x6fe642ca), X(0x3e52187f), X(0x6fcdd241),
X(0x3e7dfb73), X(0x6fb5507a), X(0x3ea9d4c3), X(0x6f9cbd79),
X(0x3ed5a46b), X(0x6f841942), X(0x3f016a61), X(0x6f6b63d8),
X(0x3f2d26a0), X(0x6f529d40), X(0x3f58d921), X(0x6f39c57d),
X(0x3f8481dd), X(0x6f20dc92), X(0x3fb020ce), X(0x6f07e285),
X(0x3fdbb5ec), X(0x6eeed758), X(0x40074132), X(0x6ed5bb10),
X(0x4032c297), X(0x6ebc8db0), X(0x405e3a16), X(0x6ea34f3d),
X(0x4089a7a8), X(0x6e89ffb9), X(0x40b50b46), X(0x6e709f2a),
X(0x40e064ea), X(0x6e572d93), X(0x410bb48c), X(0x6e3daaf8),
X(0x4136fa27), X(0x6e24175c), X(0x416235b2), X(0x6e0a72c5),
X(0x418d6729), X(0x6df0bd35), X(0x41b88e84), X(0x6dd6f6b1),
X(0x41e3abbc), X(0x6dbd1f3c), X(0x420ebecb), X(0x6da336dc),
X(0x4239c7aa), X(0x6d893d93), X(0x4264c653), X(0x6d6f3365),
X(0x428fbabe), X(0x6d551858), X(0x42baa4e6), X(0x6d3aec6e),
X(0x42e584c3), X(0x6d20afac), X(0x43105a50), X(0x6d066215),
X(0x433b2585), X(0x6cec03af), X(0x4365e65b), X(0x6cd1947c),
X(0x43909ccd), X(0x6cb71482), X(0x43bb48d4), X(0x6c9c83c3),
X(0x43e5ea68), X(0x6c81e245), X(0x44108184), X(0x6c67300b),
X(0x443b0e21), X(0x6c4c6d1a), X(0x44659039), X(0x6c319975),
X(0x449007c4), X(0x6c16b521), X(0x44ba74bd), X(0x6bfbc021),
X(0x44e4d71c), X(0x6be0ba7b), X(0x450f2edb), X(0x6bc5a431),
X(0x45397bf4), X(0x6baa7d49), X(0x4563be60), X(0x6b8f45c7),
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X(0x4b6120bb), X(0x677340ba), X(0x4b89badd), X(0x67559eca),
X(0x4bb24958), X(0x6737ecea), X(0x4bdacc28), X(0x671a2b20),
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X(0x4ca4aa41), X(0x66847408), X(0x4ccce684), X(0x6666531d),
X(0x4cf516ee), X(0x66482267), X(0x4d1d3b7a), X(0x6629e1ec),
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X(0x4fc079b1), X(0x641e3e38), X(0x4fe7c483), X(0x63fee4f8),
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X(0x569cb7a8), X(0x5e3f0194), X(0x56c1b3a1), X(0x5e1cf71c),
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X(0x58550f6c), X(0x5ca2ca99), X(0x58796962), X(0x5c801354),
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};

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: miscellaneous math and prototypes
********************************************************************/
#ifndef _V_RANDOM_H_
#define _V_RANDOM_H_
#include "ivorbiscodec.h"
#include "os.h"
#include "asm_arm.h"
#include <stdlib.h> /* for abs() */
#ifdef GEKKO
#include <gctypes.h>
#endif
#ifndef _V_WIDE_MATH
#define _V_WIDE_MATH
#ifndef _LOW_ACCURACY_
/* 64 bit multiply */
#if !(defined WIN32 && defined WINCE)
#include <sys/types.h>
#endif
#if BYTE_ORDER==LITTLE_ENDIAN
union magic {
struct {
ogg_int32_t lo;
ogg_int32_t hi;
} halves;
ogg_int64_t whole;
};
#endif
#if BYTE_ORDER==BIG_ENDIAN
union magic {
struct {
ogg_int32_t hi;
ogg_int32_t lo;
} halves;
ogg_int64_t whole;
};
#endif
STIN ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
union magic magic;
magic.whole = (ogg_int64_t)x * y;
return magic.halves.hi;
}
STIN ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
return MULT32(x,y)<<1;
}
STIN ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
union magic magic;
magic.whole = (ogg_int64_t)x * y;
return ((ogg_uint32_t)(magic.halves.lo)>>15) | ((magic.halves.hi)<<17);
}
#else
/* 32 bit multiply, more portable but less accurate */
/*
* Note: Precision is biased towards the first argument therefore ordering
* is important. Shift values were chosen for the best sound quality after
* many listening tests.
*/
/*
* For MULT32 and MULT31: The second argument is always a lookup table
* value already preshifted from 31 to 8 bits. We therefore take the
* opportunity to save on text space and use unsigned char for those
* tables in this case.
*/
STIN ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
return (x >> 9) * y; /* y preshifted >>23 */
}
STIN ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) {
return (x >> 8) * y; /* y preshifted >>23 */
}
STIN ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) {
return (x >> 6) * y; /* y preshifted >>9 */
}
#endif
/*
* This should be used as a memory barrier, forcing all cached values in
* registers to wr writen back to memory. Might or might not be beneficial
* depending on the architecture and compiler.
*/
#define MB()
/*
* The XPROD functions are meant to optimize the cross products found all
* over the place in mdct.c by forcing memory operation ordering to avoid
* unnecessary register reloads as soon as memory is being written to.
* However this is only beneficial on CPUs with a sane number of general
* purpose registers which exclude the Intel x86. On Intel, better let the
* compiler actually reload registers directly from original memory by using
* macros.
*/
#ifdef __i386__
#define XPROD32(_a, _b, _t, _v, _x, _y) \
{ *(_x)=MULT32(_a,_t)+MULT32(_b,_v); \
*(_y)=MULT32(_b,_t)-MULT32(_a,_v); }
#define XPROD31(_a, _b, _t, _v, _x, _y) \
{ *(_x)=MULT31(_a,_t)+MULT31(_b,_v); \
*(_y)=MULT31(_b,_t)-MULT31(_a,_v); }
#define XNPROD31(_a, _b, _t, _v, _x, _y) \
{ *(_x)=MULT31(_a,_t)-MULT31(_b,_v); \
*(_y)=MULT31(_b,_t)+MULT31(_a,_v); }
#else
STIN void XPROD32(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
*x = MULT32(a, t) + MULT32(b, v);
*y = MULT32(b, t) - MULT32(a, v);
}
STIN void XPROD31(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
*x = MULT31(a, t) + MULT31(b, v);
*y = MULT31(b, t) - MULT31(a, v);
}
STIN void XNPROD31(ogg_int32_t a, ogg_int32_t b,
ogg_int32_t t, ogg_int32_t v,
ogg_int32_t *x, ogg_int32_t *y)
{
*x = MULT31(a, t) - MULT31(b, v);
*y = MULT31(b, t) + MULT31(a, v);
}
#endif
#endif
#ifndef _V_CLIP_MATH
#define _V_CLIP_MATH
STIN ogg_int32_t CLIP_TO_15(ogg_int32_t x) {
int ret=x;
ret-= ((x<=32767)-1)&(x-32767);
ret-= ((x>=-32768)-1)&(x+32768);
return(ret);
}
#endif
STIN ogg_int32_t VFLOAT_MULT(ogg_int32_t a,ogg_int32_t ap,
ogg_int32_t b,ogg_int32_t bp,
ogg_int32_t *p){
if(a && b){
#ifndef _LOW_ACCURACY_
*p=ap+bp+32;
return MULT32(a,b);
#else
*p=ap+bp+31;
return (a>>15)*(b>>16);
#endif
}else
return 0;
}
int _ilog(unsigned int);
STIN ogg_int32_t VFLOAT_MULTI(ogg_int32_t a,ogg_int32_t ap,
ogg_int32_t i,
ogg_int32_t *p){
int ip=_ilog(abs(i))-31;
return VFLOAT_MULT(a,ap,i<<-ip,ip,p);
}
STIN ogg_int32_t VFLOAT_ADD(ogg_int32_t a,ogg_int32_t ap,
ogg_int32_t b,ogg_int32_t bp,
ogg_int32_t *p){
if(!a){
*p=bp;
return b;
}else if(!b){
*p=ap;
return a;
}
/* yes, this can leak a bit. */
if(ap>bp){
int shift=ap-bp+1;
*p=ap+1;
a>>=1;
if(shift<32){
b=(b+(1<<(shift-1)))>>shift;
}else{
b=0;
}
}else{
int shift=bp-ap+1;
*p=bp+1;
b>>=1;
if(shift<32){
a=(a+(1<<(shift-1)))>>shift;
}else{
a=0;
}
}
a+=b;
if((a&0xc0000000)==0xc0000000 ||
(a&0xc0000000)==0){
a<<=1;
(*p)--;
}
return(a);
}
#endif

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: subsumed libogg includes
********************************************************************/
#ifndef _OGG_H
#define _OGG_H
#ifdef __cplusplus
extern "C" {
#endif
#include "os_types.h"
typedef struct ogg_buffer_state{
struct ogg_buffer *unused_buffers;
struct ogg_reference *unused_references;
int outstanding;
int shutdown;
} ogg_buffer_state;
typedef struct ogg_buffer {
unsigned char *data;
long size;
int refcount;
union {
ogg_buffer_state *owner;
struct ogg_buffer *next;
} ptr;
} ogg_buffer;
typedef struct ogg_reference {
ogg_buffer *buffer;
long begin;
long length;
struct ogg_reference *next;
} ogg_reference;
typedef struct oggpack_buffer {
int headbit;
unsigned char *headptr;
long headend;
/* memory management */
ogg_reference *head;
ogg_reference *tail;
/* render the byte/bit counter API constant time */
long count; /* doesn't count the tail */
} oggpack_buffer;
typedef struct oggbyte_buffer {
ogg_reference *baseref;
ogg_reference *ref;
unsigned char *ptr;
long pos;
long end;
} oggbyte_buffer;
typedef struct ogg_sync_state {
/* decode memory management pool */
ogg_buffer_state *bufferpool;
/* stream buffers */
ogg_reference *fifo_head;
ogg_reference *fifo_tail;
long fifo_fill;
/* stream sync management */
int unsynced;
int headerbytes;
int bodybytes;
} ogg_sync_state;
typedef struct ogg_stream_state {
ogg_reference *header_head;
ogg_reference *header_tail;
ogg_reference *body_head;
ogg_reference *body_tail;
int e_o_s; /* set when we have buffered the last
packet in the logical bitstream */
int b_o_s; /* set after we've written the initial page
of a logical bitstream */
long serialno;
long pageno;
ogg_int64_t packetno; /* sequence number for decode; the framing
knows where there's a hole in the data,
but we need coupling so that the codec
(which is in a seperate abstraction
layer) also knows about the gap */
ogg_int64_t granulepos;
int lacing_fill;
ogg_uint32_t body_fill;
/* decode-side state data */
int holeflag;
int spanflag;
int clearflag;
int laceptr;
ogg_uint32_t body_fill_next;
} ogg_stream_state;
typedef struct {
ogg_reference *packet;
long bytes;
long b_o_s;
long e_o_s;
ogg_int64_t granulepos;
ogg_int64_t packetno; /* sequence number for decode; the framing
knows where there's a hole in the data,
but we need coupling so that the codec
(which is in a seperate abstraction
layer) also knows about the gap */
} ogg_packet;
typedef struct {
ogg_reference *header;
int header_len;
ogg_reference *body;
long body_len;
} ogg_page;
/* Ogg BITSTREAM PRIMITIVES: bitstream ************************/
extern void oggpack_readinit(oggpack_buffer *b,ogg_reference *r);
extern long oggpack_look(oggpack_buffer *b,int bits);
extern void oggpack_adv(oggpack_buffer *b,int bits);
extern long oggpack_read(oggpack_buffer *b,int bits);
extern long oggpack_bytes(oggpack_buffer *b);
extern long oggpack_bits(oggpack_buffer *b);
extern int oggpack_eop(oggpack_buffer *b);
/* Ogg BITSTREAM PRIMITIVES: decoding **************************/
extern ogg_sync_state *ogg_sync_create(void);
extern int ogg_sync_destroy(ogg_sync_state *oy);
extern int ogg_sync_reset(ogg_sync_state *oy);
extern unsigned char *ogg_sync_bufferin(ogg_sync_state *oy, long size);
extern int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
extern long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og);
extern int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
extern int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
extern int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
extern int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
/* Ogg BITSTREAM PRIMITIVES: general ***************************/
extern ogg_stream_state *ogg_stream_create(int serialno);
extern int ogg_stream_destroy(ogg_stream_state *os);
extern int ogg_stream_reset(ogg_stream_state *os);
extern int ogg_stream_reset_serialno(ogg_stream_state *os,int serialno);
extern int ogg_stream_eos(ogg_stream_state *os);
extern int ogg_page_checksum_set(ogg_page *og);
extern int ogg_page_version(ogg_page *og);
extern int ogg_page_continued(ogg_page *og);
extern int ogg_page_bos(ogg_page *og);
extern int ogg_page_eos(ogg_page *og);
extern ogg_int64_t ogg_page_granulepos(ogg_page *og);
extern ogg_uint32_t ogg_page_serialno(ogg_page *og);
extern ogg_uint32_t ogg_page_pageno(ogg_page *og);
extern int ogg_page_packets(ogg_page *og);
extern int ogg_page_getbuffer(ogg_page *og, unsigned char **buffer);
extern int ogg_packet_release(ogg_packet *op);
extern int ogg_page_release(ogg_page *og);
extern void ogg_page_dup(ogg_page *d, ogg_page *s);
/* Ogg BITSTREAM PRIMITIVES: return codes ***************************/
#define OGG_SUCCESS 0
#define OGG_HOLE -10
#define OGG_SPAN -11
#define OGG_EVERSION -12
#define OGG_ESERIAL -13
#define OGG_EINVAL -14
#define OGG_EEOS -15
#ifdef __cplusplus
}
#endif
#endif /* _OGG_H */

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#ifndef _OS_H
#define _OS_H
/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: #ifdef jail to whip a few platforms into the UNIX ideal.
********************************************************************/
#include <math.h>
#include "os_types.h"
#ifndef _V_IFDEFJAIL_H_
# define _V_IFDEFJAIL_H_
# ifdef __GNUC__
# define STIN static __inline__
# elif _WIN32
# define STIN static __inline
# endif
#else
# define STIN static
#endif
#ifndef M_PI
# define M_PI (3.1415926536f)
#endif
#ifdef _WIN32
# include <malloc.h>
# define rint(x) (floor((x)+0.5f))
# define NO_FLOAT_MATH_LIB
# define FAST_HYPOT(a, b) sqrt((a)*(a) + (b)*(b))
# define LITTLE_ENDIAN 1
# define BYTE_ORDER LITTLE_ENDIAN
#endif
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#endif
#ifdef USE_MEMORY_H
# include <memory.h>
#endif
#ifndef min
# define min(x,y) ((x)>(y)?(y):(x))
#endif
#ifndef max
# define max(x,y) ((x)<(y)?(y):(x))
#endif
#endif /* _OS_H */

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: #ifdef jail to whip a few platforms into the UNIX ideal.
********************************************************************/
#ifndef _OS_TYPES_H
#define _OS_TYPES_H
#ifdef _LOW_ACCURACY_
# define X(n) (((((n)>>22)+1)>>1) - ((((n)>>22)+1)>>9))
# define LOOKUP_T const unsigned char
#else
# define X(n) (n)
# define LOOKUP_T const ogg_int32_t
#endif
/* make it easy on the folks that want to compile the libs with a
different malloc than stdlib */
#define _ogg_malloc malloc
#define _ogg_calloc calloc
#define _ogg_realloc realloc
#define _ogg_free free
#include <inttypes.h>
typedef int64_t ogg_int64_t;
typedef int32_t ogg_int32_t;
typedef uint32_t ogg_uint32_t;
typedef int16_t ogg_int16_t;
#endif /* _OS_TYPES_H */

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: registry for floor, res backends and channel mappings
********************************************************************/
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "registry.h"
#include "misc.h"
/* seems like major overkill now; the backend numbers will grow into
the infrastructure soon enough */
extern vorbis_func_floor floor0_exportbundle;
extern vorbis_func_floor floor1_exportbundle;
extern vorbis_func_residue residue0_exportbundle;
extern vorbis_func_residue residue1_exportbundle;
extern vorbis_func_residue residue2_exportbundle;
extern vorbis_func_mapping mapping0_exportbundle;
vorbis_func_floor *_floor_P[]={
&floor0_exportbundle,
&floor1_exportbundle,
};
vorbis_func_residue *_residue_P[]={
&residue0_exportbundle,
&residue1_exportbundle,
&residue2_exportbundle,
};
vorbis_func_mapping *_mapping_P[]={
&mapping0_exportbundle,
};

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: registry for time, floor, res backends and channel mappings
********************************************************************/
#ifndef _V_REG_H_
#define _V_REG_H_
#define VI_TRANSFORMB 1
#define VI_WINDOWB 1
#define VI_TIMEB 1
#define VI_FLOORB 2
#define VI_RESB 3
#define VI_MAPB 1
#include "backends.h"
#if defined(_WIN32) && defined(VORBISDLL_IMPORT)
# define EXTERN __declspec(dllimport) extern
#else
# define EXTERN extern
#endif
EXTERN vorbis_func_floor *_floor_P[];
EXTERN vorbis_func_residue *_residue_P[];
EXTERN vorbis_func_mapping *_mapping_P[];
#endif

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: residue backend 0, 1 and 2 implementation
********************************************************************/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "registry.h"
#include "codebook.h"
#include "misc.h"
#include "os.h"
#include "block.h"
typedef struct {
vorbis_info_residue0 *info;
int map;
int parts;
int stages;
codebook *fullbooks;
codebook *phrasebook;
codebook ***partbooks;
int partvals;
int **decodemap;
} vorbis_look_residue0;
void res0_free_info(vorbis_info_residue *i){
vorbis_info_residue0 *info=(vorbis_info_residue0 *)i;
if(info){
memset(info,0,sizeof(*info));
_ogg_free(info);
}
}
void res0_free_look(vorbis_look_residue *i){
int j;
if(i){
vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
for(j=0;j<look->parts;j++)
if(look->partbooks[j])_ogg_free(look->partbooks[j]);
_ogg_free(look->partbooks);
for(j=0;j<look->partvals;j++)
_ogg_free(look->decodemap[j]);
_ogg_free(look->decodemap);
memset(look,0,sizeof(*look));
_ogg_free(look);
}
}
static int ilog(unsigned int v){
int ret=0;
while(v){
ret++;
v>>=1;
}
return(ret);
}
static int icount(unsigned int v){
int ret=0;
while(v){
ret+=v&1;
v>>=1;
}
return(ret);
}
/* vorbis_info is for range checking */
vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
int j,acc=0;
vorbis_info_residue0 *info=(vorbis_info_residue0 *)_ogg_calloc(1,sizeof(*info));
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
info->begin=oggpack_read(opb,24);
info->end=oggpack_read(opb,24);
info->grouping=oggpack_read(opb,24)+1;
info->partitions=oggpack_read(opb,6)+1;
info->groupbook=oggpack_read(opb,8);
for(j=0;j<info->partitions;j++){
int cascade=oggpack_read(opb,3);
if(oggpack_read(opb,1))
cascade|=(oggpack_read(opb,5)<<3);
info->secondstages[j]=cascade;
acc+=icount(cascade);
}
for(j=0;j<acc;j++)
info->booklist[j]=oggpack_read(opb,8);
if(info->groupbook>=ci->books)goto errout;
for(j=0;j<acc;j++)
if(info->booklist[j]>=ci->books)goto errout;
return(info);
errout:
res0_free_info(info);
return(NULL);
}
vorbis_look_residue *res0_look(vorbis_dsp_state *vd,vorbis_info_mode *vm,
vorbis_info_residue *vr){
vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
vorbis_look_residue0 *look=(vorbis_look_residue0 *)_ogg_calloc(1,sizeof(*look));
codec_setup_info *ci=(codec_setup_info *)vd->vi->codec_setup;
int j,k,acc=0;
int dim;
int maxstage=0;
look->info=info;
look->map=vm->mapping;
look->parts=info->partitions;
look->fullbooks=ci->fullbooks;
look->phrasebook=ci->fullbooks+info->groupbook;
dim=look->phrasebook->dim;
look->partbooks=(codebook ***)_ogg_calloc(look->parts,sizeof(*look->partbooks));
for(j=0;j<look->parts;j++){
int stages=ilog(info->secondstages[j]);
if(stages){
if(stages>maxstage)maxstage=stages;
look->partbooks[j]=(codebook **)_ogg_calloc(stages,sizeof(*look->partbooks[j]));
for(k=0;k<stages;k++)
if(info->secondstages[j]&(1<<k)){
look->partbooks[j][k]=ci->fullbooks+info->booklist[acc++];
#ifdef TRAIN_RES
look->training_data[k][j]=calloc(look->partbooks[j][k]->entries,
sizeof(***look->training_data));
#endif
}
}
}
look->partvals=look->parts;
for(j=1;j<dim;j++)look->partvals*=look->parts;
look->stages=maxstage;
look->decodemap=(int **)_ogg_malloc(look->partvals*sizeof(*look->decodemap));
for(j=0;j<look->partvals;j++){
long val=j;
long mult=look->partvals/look->parts;
look->decodemap[j]=(int *)_ogg_malloc(dim*sizeof(*look->decodemap[j]));
for(k=0;k<dim;k++){
long deco=val/mult;
val-=deco*mult;
mult/=look->parts;
look->decodemap[j][k]=deco;
}
}
return(look);
}
/* a truncated packet here just means 'stop working'; it's not an error */
static int _01inverse(vorbis_block *vb,vorbis_look_residue *vl,
ogg_int32_t **in,int ch,
long (*decodepart)(codebook *, ogg_int32_t *,
oggpack_buffer *,int,int)){
long i,j,k,l,s;
vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
vorbis_info_residue0 *info=look->info;
/* move all this setup out later */
int samples_per_partition=info->grouping;
int partitions_per_word=look->phrasebook->dim;
int max=vb->pcmend>>1;
int end=(info->end<max?info->end:max);
int n=end-info->begin;
if(n>0){
int partvals=n/samples_per_partition;
int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
int ***partword=(int ***)alloca(ch*sizeof(*partword));
for(j=0;j<ch;j++)
partword[j]=(int **)_vorbis_block_alloc(vb,partwords*sizeof(*partword[j]));
for(s=0;s<look->stages;s++){
/* each loop decodes on partition codeword containing
partitions_pre_word partitions */
for(i=0,l=0;i<partvals;l++){
if(s==0){
/* fetch the partition word for each channel */
for(j=0;j<ch;j++){
int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
if(temp==-1)goto eopbreak;
partword[j][l]=look->decodemap[temp];
if(partword[j][l]==NULL)goto errout;
}
}
/* now we decode residual values for the partitions */
for(k=0;k<partitions_per_word && i<partvals;k++,i++)
for(j=0;j<ch;j++){
long offset=info->begin+i*samples_per_partition;
if(info->secondstages[partword[j][l][k]]&(1<<s)){
codebook *stagebook=look->partbooks[partword[j][l][k]][s];
if(stagebook){
if(decodepart(stagebook,in[j]+offset,&vb->opb,
samples_per_partition,-8)==-1)goto eopbreak;
}
}
}
}
}
}
errout:
eopbreak:
return(0);
}
int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,
ogg_int32_t **in,int *nonzero,int ch){
int i,used=0;
for(i=0;i<ch;i++)
if(nonzero[i])
in[used++]=in[i];
if(used)
return(_01inverse(vb,vl,in,used,vorbis_book_decodevs_add));
else
return(0);
}
int res1_inverse(vorbis_block *vb,vorbis_look_residue *vl,
ogg_int32_t **in,int *nonzero,int ch){
int i,used=0;
for(i=0;i<ch;i++)
if(nonzero[i])
in[used++]=in[i];
if(used)
return(_01inverse(vb,vl,in,used,vorbis_book_decodev_add));
else
return(0);
}
/* duplicate code here as speed is somewhat more important */
int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl,
ogg_int32_t **in,int *nonzero,int ch){
long i,k,l,s;
vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
vorbis_info_residue0 *info=look->info;
/* move all this setup out later */
int samples_per_partition=info->grouping;
int partitions_per_word=look->phrasebook->dim;
int max=(vb->pcmend*ch)>>1;
int end=(info->end<max?info->end:max);
int n=end-info->begin;
if(n>0){
int partvals=n/samples_per_partition;
int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
int **partword=(int **)_vorbis_block_alloc(vb,partwords*sizeof(*partword));
int beginoff=info->begin/ch;
for(i=0;i<ch;i++)if(nonzero[i])break;
if(i==ch)return(0); /* no nonzero vectors */
samples_per_partition/=ch;
for(s=0;s<look->stages;s++){
for(i=0,l=0;i<partvals;l++){
if(s==0){
/* fetch the partition word */
int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
if(temp==-1)goto eopbreak;
partword[l]=look->decodemap[temp];
if(partword[l]==NULL)goto errout;
}
/* now we decode residual values for the partitions */
for(k=0;k<partitions_per_word && i<partvals;k++,i++)
if(info->secondstages[partword[l][k]]&(1<<s)){
codebook *stagebook=look->partbooks[partword[l][k]][s];
if(stagebook){
if(vorbis_book_decodevv_add(stagebook,in,
i*samples_per_partition+beginoff,ch,
&vb->opb,
samples_per_partition,-8)==-1)
goto eopbreak;
}
}
}
}
}
errout:
eopbreak:
return(0);
}
vorbis_func_residue residue0_exportbundle={
&res0_unpack,
&res0_look,
&res0_free_info,
&res0_free_look,
&res0_inverse
};
vorbis_func_residue residue1_exportbundle={
&res0_unpack,
&res0_look,
&res0_free_info,
&res0_free_look,
&res1_inverse
};
vorbis_func_residue residue2_exportbundle={
&res0_unpack,
&res0_look,
&res0_free_info,
&res0_free_look,
&res2_inverse
};

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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: basic shared codebook operations
********************************************************************/
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include "ogg.h"
#include "misc.h"
#include "ivorbiscodec.h"
#include "codebook.h"
/**** pack/unpack helpers ******************************************/
int _ilog(unsigned int v){
int ret=0;
while(v){
ret++;
v>>=1;
}
return(ret);
}
/* 32 bit float (not IEEE; nonnormalized mantissa +
biased exponent) : neeeeeee eeemmmmm mmmmmmmm mmmmmmmm
Why not IEEE? It's just not that important here. */
#define VQ_FEXP 10
#define VQ_FMAN 21
#define VQ_FEXP_BIAS 768 /* bias toward values smaller than 1. */
static ogg_int32_t _float32_unpack(long val,int *point){
long mant=val&0x1fffff;
int sign=val&0x80000000;
long exp =(val&0x7fe00000L)>>VQ_FMAN;
exp-=(VQ_FMAN-1)+VQ_FEXP_BIAS;
if(mant){
while(!(mant&0x40000000)){
mant<<=1;
exp-=1;
}
if(sign)mant= -mant;
}else{
sign=0;
exp=-9999;
}
*point=exp;
return mant;
}
/* given a list of word lengths, generate a list of codewords. Works
for length ordered or unordered, always assigns the lowest valued
codewords first. Extended to handle unused entries (length 0) */
ogg_uint32_t *_make_words(long *l,long n,long sparsecount){
long i,j,count=0;
ogg_uint32_t marker[33];
ogg_uint32_t *r=(ogg_uint32_t *)_ogg_malloc((sparsecount?sparsecount:n)*sizeof(*r));
memset(marker,0,sizeof(marker));
for(i=0;i<n;i++){
long length=l[i];
if(length>0){
ogg_uint32_t entry=marker[length];
/* when we claim a node for an entry, we also claim the nodes
below it (pruning off the imagined tree that may have dangled
from it) as well as blocking the use of any nodes directly
above for leaves */
/* update ourself */
if(length<32 && (entry>>length)){
/* error condition; the lengths must specify an overpopulated tree */
_ogg_free(r);
return(NULL);
}
r[count++]=entry;
/* Look to see if the next shorter marker points to the node
above. if so, update it and repeat. */
{
for(j=length;j>0;j--){
if(marker[j]&1){
/* have to jump branches */
if(j==1)
marker[1]++;
else
marker[j]=marker[j-1]<<1;
break; /* invariant says next upper marker would already
have been moved if it was on the same path */
}
marker[j]++;
}
}
/* prune the tree; the implicit invariant says all the longer
markers were dangling from our just-taken node. Dangle them
from our *new* node. */
for(j=length+1;j<33;j++)
if((marker[j]>>1) == entry){
entry=marker[j];
marker[j]=marker[j-1]<<1;
}else
break;
}else
if(sparsecount==0)count++;
}
/* bitreverse the words because our bitwise packer/unpacker is LSb
endian */
for(i=0,count=0;i<n;i++){
ogg_uint32_t temp=0;
for(j=0;j<l[i];j++){
temp<<=1;
temp|=(r[count]>>j)&1;
}
if(sparsecount){
if(l[i])
r[count++]=temp;
}else
r[count++]=temp;
}
return(r);
}
/* there might be a straightforward one-line way to do the below
that's portable and totally safe against roundoff, but I haven't
thought of it. Therefore, we opt on the side of caution */
long _book_maptype1_quantvals(const static_codebook *b){
/* get us a starting hint, we'll polish it below */
int bits=_ilog(b->entries);
int vals=b->entries>>((bits-1)*(b->dim-1)/b->dim);
while(1){
long acc=1;
long acc1=1;
int i;
for(i=0;i<b->dim;i++){
acc*=vals;
acc1*=vals+1;
}
if(acc<=b->entries && acc1>b->entries){
return(vals);
}else{
if(acc>b->entries){
vals--;
}else{
vals++;
}
}
}
}
/* different than what _book_unquantize does for mainline:
we repack the book in a fixed point format that shares the same
binary point. Upon first use, we can shift point if needed */
/* we need to deal with two map types: in map type 1, the values are
generated algorithmically (each column of the vector counts through
the values in the quant vector). in map type 2, all the values came
in in an explicit list. Both value lists must be unpacked */
ogg_int32_t *_book_unquantize(const static_codebook *b,int n,int *sparsemap,
int *maxpoint){
long j,k,count=0;
if(b->maptype==1 || b->maptype==2){
int quantvals;
int minpoint,delpoint;
ogg_int32_t mindel=_float32_unpack(b->q_min,&minpoint);
ogg_int32_t delta=_float32_unpack(b->q_delta,&delpoint);
ogg_int32_t *r=(ogg_int32_t *)_ogg_calloc(n*b->dim,sizeof(*r));
int *rp=(int *)_ogg_calloc(n*b->dim,sizeof(*rp));
*maxpoint=minpoint;
/* maptype 1 and 2 both use a quantized value vector, but
different sizes */
switch(b->maptype){
case 1:
/* most of the time, entries%dimensions == 0, but we need to be
well defined. We define that the possible vales at each
scalar is values == entries/dim. If entries%dim != 0, we'll
have 'too few' values (values*dim<entries), which means that
we'll have 'left over' entries; left over entries use zeroed
values (and are wasted). So don't generate codebooks like
that */
quantvals=_book_maptype1_quantvals(b);
for(j=0;j<b->entries;j++){
if((sparsemap && b->lengthlist[j]) || !sparsemap){
ogg_int32_t last=0;
int lastpoint=0;
int indexdiv=1;
for(k=0;k<b->dim;k++){
int index= (j/indexdiv)%quantvals;
int point=0;
int val=VFLOAT_MULTI(delta,delpoint,
abs(b->quantlist[index]),&point);
val=VFLOAT_ADD(mindel,minpoint,val,point,&point);
val=VFLOAT_ADD(last,lastpoint,val,point,&point);
if(b->q_sequencep){
last=val;
lastpoint=point;
}
if(sparsemap){
r[sparsemap[count]*b->dim+k]=val;
rp[sparsemap[count]*b->dim+k]=point;
}else{
r[count*b->dim+k]=val;
rp[count*b->dim+k]=point;
}
if(*maxpoint<point)*maxpoint=point;
indexdiv*=quantvals;
}
count++;
}
}
break;
case 2:
for(j=0;j<b->entries;j++){
if((sparsemap && b->lengthlist[j]) || !sparsemap){
ogg_int32_t last=0;
int lastpoint=0;
for(k=0;k<b->dim;k++){
int point=0;
int val=VFLOAT_MULTI(delta,delpoint,
abs(b->quantlist[j*b->dim+k]),&point);
val=VFLOAT_ADD(mindel,minpoint,val,point,&point);
val=VFLOAT_ADD(last,lastpoint,val,point,&point);
if(b->q_sequencep){
last=val;
lastpoint=point;
}
if(sparsemap){
r[sparsemap[count]*b->dim+k]=val;
rp[sparsemap[count]*b->dim+k]=point;
}else{
r[count*b->dim+k]=val;
rp[count*b->dim+k]=point;
}
if(*maxpoint<point)*maxpoint=point;
}
count++;
}
}
break;
}
for(j=0;j<n*b->dim;j++)
if(rp[j]<*maxpoint)
r[j]>>=*maxpoint-rp[j];
_ogg_free(rp);
return(r);
}
return(NULL);
}
void vorbis_staticbook_clear(static_codebook *b){
if(b->quantlist)_ogg_free(b->quantlist);
if(b->lengthlist)_ogg_free(b->lengthlist);
memset(b,0,sizeof(*b));
}
void vorbis_staticbook_destroy(static_codebook *b){
vorbis_staticbook_clear(b);
_ogg_free(b);
}
void vorbis_book_clear(codebook *b){
/* static book is not cleared; we're likely called on the lookup and
the static codebook belongs to the info struct */
if(b->valuelist)_ogg_free(b->valuelist);
if(b->codelist)_ogg_free(b->codelist);
if(b->dec_index)_ogg_free(b->dec_index);
if(b->dec_codelengths)_ogg_free(b->dec_codelengths);
if(b->dec_firsttable)_ogg_free(b->dec_firsttable);
memset(b,0,sizeof(*b));
}
static ogg_uint32_t bitreverse(ogg_uint32_t x){
x= ((x>>16)&0x0000ffffUL) | ((x<<16)&0xffff0000UL);
x= ((x>> 8)&0x00ff00ffUL) | ((x<< 8)&0xff00ff00UL);
x= ((x>> 4)&0x0f0f0f0fUL) | ((x<< 4)&0xf0f0f0f0UL);
x= ((x>> 2)&0x33333333UL) | ((x<< 2)&0xccccccccUL);
return((x>> 1)&0x55555555UL) | ((x<< 1)&0xaaaaaaaaUL);
}
static int sort32a(const void *a,const void *b){
return (**(ogg_uint32_t **)a>**(ogg_uint32_t **)b)-
(**(ogg_uint32_t **)a<**(ogg_uint32_t **)b);
}
/* decode codebook arrangement is more heavily optimized than encode */
int vorbis_book_init_decode(codebook *c,const static_codebook *s){
int i,j,n=0,tabn;
int *sortindex;
memset(c,0,sizeof(*c));
/* count actually used entries */
for(i=0;i<s->entries;i++)
if(s->lengthlist[i]>0)
n++;
c->entries=s->entries;
c->used_entries=n;
c->dim=s->dim;
if(n>0){
/* two different remappings go on here.
First, we collapse the likely sparse codebook down only to
actually represented values/words. This collapsing needs to be
indexed as map-valueless books are used to encode original entry
positions as integers.
Second, we reorder all vectors, including the entry index above,
by sorted bitreversed codeword to allow treeless decode. */
/* perform sort */
ogg_uint32_t *codes=_make_words(s->lengthlist,s->entries,c->used_entries);
ogg_uint32_t **codep=(ogg_uint32_t **)alloca(sizeof(*codep)*n);
if(codes==NULL)goto err_out;
for(i=0;i<n;i++){
codes[i]=bitreverse(codes[i]);
codep[i]=codes+i;
}
qsort(codep,n,sizeof(*codep),sort32a);
sortindex=(int *)alloca(n*sizeof(*sortindex));
c->codelist=(ogg_uint32_t *)_ogg_malloc(n*sizeof(*c->codelist));
/* the index is a reverse index */
for(i=0;i<n;i++){
int position=codep[i]-codes;
sortindex[position]=i;
}
for(i=0;i<n;i++)
c->codelist[sortindex[i]]=codes[i];
_ogg_free(codes);
c->valuelist=_book_unquantize(s,n,sortindex,&c->binarypoint);
c->dec_index=(int *)_ogg_malloc(n*sizeof(*c->dec_index));
for(n=0,i=0;i<s->entries;i++)
if(s->lengthlist[i]>0)
c->dec_index[sortindex[n++]]=i;
c->dec_codelengths=(char *)_ogg_malloc(n*sizeof(*c->dec_codelengths));
for(n=0,i=0;i<s->entries;i++)
if(s->lengthlist[i]>0)
c->dec_codelengths[sortindex[n++]]=s->lengthlist[i];
c->dec_firsttablen=_ilog(c->used_entries)-4; /* this is magic */
if(c->dec_firsttablen<5)c->dec_firsttablen=5;
if(c->dec_firsttablen>8)c->dec_firsttablen=8;
tabn=1<<c->dec_firsttablen;
c->dec_firsttable=(ogg_uint32_t *)_ogg_calloc(tabn,sizeof(*c->dec_firsttable));
c->dec_maxlength=0;
for(i=0;i<n;i++){
if(c->dec_maxlength<c->dec_codelengths[i])
c->dec_maxlength=c->dec_codelengths[i];
if(c->dec_codelengths[i]<=c->dec_firsttablen){
ogg_uint32_t orig=bitreverse(c->codelist[i]);
for(j=0;j<(1<<(c->dec_firsttablen-c->dec_codelengths[i]));j++)
c->dec_firsttable[orig|(j<<c->dec_codelengths[i])]=i+1;
}
}
/* now fill in 'unused' entries in the firsttable with hi/lo search
hints for the non-direct-hits */
{
ogg_uint32_t mask=0xfffffffeUL<<(31-c->dec_firsttablen);
long lo=0,hi=0;
for(i=0;i<tabn;i++){
ogg_uint32_t word=i<<(32-c->dec_firsttablen);
if(c->dec_firsttable[bitreverse(word)]==0){
while((lo+1)<n && c->codelist[lo+1]<=word)lo++;
while( hi<n && word>=(c->codelist[hi]&mask))hi++;
/* we only actually have 15 bits per hint to play with here.
In order to overflow gracefully (nothing breaks, efficiency
just drops), encode as the difference from the extremes. */
{
unsigned long loval=lo;
unsigned long hival=n-hi;
if(loval>0x7fff)loval=0x7fff;
if(hival>0x7fff)hival=0x7fff;
c->dec_firsttable[bitreverse(word)]=
0x80000000UL | (loval<<15) | hival;
}
}
}
}
}
return(0);
err_out:
vorbis_book_clear(c);
return(-1);
}

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source/tremor/synthesis.c Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: single-block PCM synthesis
last mod: $Id: synthesis.c,v 1.4 2003/03/29 03:07:21 xiphmont Exp $
********************************************************************/
#include <stdio.h>
#include "ogg.h"
#include "ivorbiscodec.h"
#include "codec_internal.h"
#include "registry.h"
#include "misc.h"
#include "block.h"
int vorbis_synthesis(vorbis_block *vb,ogg_packet *op,int decodep){
vorbis_dsp_state *vd=vb->vd;
private_state *b=(private_state *)vd->backend_state;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
oggpack_buffer *opb=&vb->opb;
int type,mode,i;
/* first things first. Make sure decode is ready */
_vorbis_block_ripcord(vb);
oggpack_readinit(opb,op->packet);
/* Check the packet type */
if(oggpack_read(opb,1)!=0){
/* Oops. This is not an audio data packet */
return(OV_ENOTAUDIO);
}
/* read our mode and pre/post windowsize */
mode=oggpack_read(opb,b->modebits);
if(mode==-1)return(OV_EBADPACKET);
vb->mode=mode;
vb->W=ci->mode_param[mode]->blockflag;
if(vb->W){
vb->lW=oggpack_read(opb,1);
vb->nW=oggpack_read(opb,1);
if(vb->nW==-1) return(OV_EBADPACKET);
}else{
vb->lW=0;
vb->nW=0;
}
/* more setup */
vb->granulepos=op->granulepos;
vb->sequence=op->packetno-3; /* first block is third packet */
vb->eofflag=op->e_o_s;
if(decodep){
/* alloc pcm passback storage */
vb->pcmend=ci->blocksizes[vb->W];
vb->pcm=(ogg_int32_t **)_vorbis_block_alloc(vb,sizeof(*vb->pcm)*vi->channels);
for(i=0;i<vi->channels;i++)
vb->pcm[i]=(ogg_int32_t *)_vorbis_block_alloc(vb,vb->pcmend*sizeof(*vb->pcm[i]));
/* unpack_header enforces range checking */
type=ci->map_type[ci->mode_param[mode]->mapping];
return(_mapping_P[type]->inverse(vb,b->mode[mode]));
}else{
/* no pcm */
vb->pcmend=0;
vb->pcm=NULL;
return(0);
}
}
long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op){
codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
oggpack_buffer opb;
int mode;
oggpack_readinit(&opb,op->packet);
/* Check the packet type */
if(oggpack_read(&opb,1)!=0){
/* Oops. This is not an audio data packet */
return(OV_ENOTAUDIO);
}
{
int modebits=0;
int v=ci->modes;
while(v>1){
modebits++;
v>>=1;
}
/* read our mode and pre/post windowsize */
mode=oggpack_read(&opb,modebits);
}
if(mode==-1)return(OV_EBADPACKET);
return(ci->blocksizes[ci->mode_param[mode]->blockflag]);
}

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source/tremor/vorbisfile.c Normal file
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83
source/tremor/window.c Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: window functions
********************************************************************/
#include <stdlib.h>
#include <math.h>
#include "misc.h"
#include "window.h"
#include "window_lookup.h"
const void *_vorbis_window(int type, int left){
switch(type){
case 0:
switch(left){
case 32:
return vwin64;
case 64:
return vwin128;
case 128:
return vwin256;
case 256:
return vwin512;
case 512:
return vwin1024;
case 1024:
return vwin2048;
case 2048:
return vwin4096;
case 4096:
return vwin8192;
default:
return(0);
}
break;
default:
return(0);
}
}
void _vorbis_apply_window(ogg_int32_t *d,const void *window_p[2],
long *blocksizes,
int lW,int W,int nW){
LOOKUP_T *window[2]={window_p[0],window_p[1]};
long n=blocksizes[W];
long ln=blocksizes[lW];
long rn=blocksizes[nW];
long leftbegin=n/4-ln/4;
long leftend=leftbegin+ln/2;
long rightbegin=n/2+n/4-rn/4;
long rightend=rightbegin+rn/2;
int i,p;
for(i=0;i<leftbegin;i++)
d[i]=0;
for(p=0;i<leftend;i++,p++)
d[i]=MULT31(d[i],window[lW][p]);
for(i=rightbegin,p=rn/2-1;i<rightend;i++,p--)
d[i]=MULT31(d[i],window[nW][p]);
for(;i<n;i++)
d[i]=0;
}

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source/tremor/window.h Normal file
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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. *
* *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002 *
* BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
* *
********************************************************************
function: window functions
********************************************************************/
#ifndef _V_WINDOW_
#define _V_WINDOW_
extern const void *_vorbis_window(int type,int left);
extern void _vorbis_apply_window(ogg_int32_t *d,const void *window[2],
long *blocksizes,
int lW,int W,int nW);
#endif

2084
source/tremor/window_lookup.h Normal file
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0
Makefile.win32 → source/win/Makefile.win32
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