2279 lines
70 KiB
C
2279 lines
70 KiB
C
/***************************************************************************************
|
|
* Genesis Plus
|
|
* CD drive processor & CD-DA fader
|
|
*
|
|
* Copyright (C) 2012-2024 Eke-Eke (Genesis Plus GX)
|
|
*
|
|
* Redistribution and use of this code or any derivative works are permitted
|
|
* provided that the following conditions are met:
|
|
*
|
|
* - Redistributions may not be sold, nor may they be used in a commercial
|
|
* product or activity.
|
|
*
|
|
* - Redistributions that are modified from the original source must include the
|
|
* complete source code, including the source code for all components used by a
|
|
* binary built from the modified sources. However, as a special exception, the
|
|
* source code distributed need not include anything that is normally distributed
|
|
* (in either source or binary form) with the major components (compiler, kernel,
|
|
* and so on) of the operating system on which the executable runs, unless that
|
|
* component itself accompanies the executable.
|
|
*
|
|
* - Redistributions 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.
|
|
*
|
|
* 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 COPYRIGHT OWNER 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.
|
|
*
|
|
****************************************************************************************/
|
|
#include "shared.h"
|
|
#include "megasd.h"
|
|
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
#define SUPPORTED_EXT 20
|
|
#else
|
|
#define SUPPORTED_EXT 10
|
|
#endif
|
|
|
|
/* CD blocks scanning speed */
|
|
#define CD_SCAN_SPEED 30
|
|
|
|
/* CD tracks type (CD-DA by default) */
|
|
#define TYPE_AUDIO 0x00
|
|
#define TYPE_MODE1 0x01
|
|
#define TYPE_MODE2 0x02
|
|
|
|
/* BCD conversion lookup tables */
|
|
static const uint8 lut_BCD_8[100] =
|
|
{
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
|
|
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29,
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
|
|
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
|
|
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
|
|
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
|
|
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
|
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
|
|
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
|
|
};
|
|
|
|
static const uint16 lut_BCD_16[100] =
|
|
{
|
|
0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009,
|
|
0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107, 0x0108, 0x0109,
|
|
0x0200, 0x0201, 0x0202, 0x0203, 0x0204, 0x0205, 0x0206, 0x0207, 0x0208, 0x0209,
|
|
0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307, 0x0308, 0x0309,
|
|
0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407, 0x0408, 0x0409,
|
|
0x0500, 0x0501, 0x0502, 0x0503, 0x0504, 0x0505, 0x0506, 0x0507, 0x0508, 0x0509,
|
|
0x0600, 0x0601, 0x0602, 0x0603, 0x0604, 0x0605, 0x0606, 0x0607, 0x0608, 0x0609,
|
|
0x0700, 0x0701, 0x0702, 0x0703, 0x0704, 0x0705, 0x0706, 0x0707, 0x0708, 0x0709,
|
|
0x0800, 0x0801, 0x0802, 0x0803, 0x0804, 0x0805, 0x0806, 0x0807, 0x0808, 0x0809,
|
|
0x0900, 0x0901, 0x0902, 0x0903, 0x0904, 0x0905, 0x0906, 0x0907, 0x0908, 0x0909,
|
|
};
|
|
|
|
/* pre-build TOC */
|
|
static const uint16 toc_snatcher[21] =
|
|
{
|
|
56014, 495, 10120, 20555, 1580, 5417, 12502, 16090, 6553, 9681,
|
|
8148, 20228, 8622, 6142, 5858, 1287, 7424, 3535, 31697, 2485,
|
|
31380
|
|
};
|
|
|
|
static const uint16 toc_lunar[52] =
|
|
{
|
|
5422, 1057, 7932, 5401, 6380, 6592, 5862, 5937, 5478, 5870,
|
|
6673, 6613, 6429, 4996, 4977, 5657, 3720, 5892, 3140, 3263,
|
|
6351, 5187, 3249, 1464, 1596, 1750, 1751, 6599, 4578, 5205,
|
|
1550, 1827, 2328, 1346, 1569, 1613, 7199, 4928, 1656, 2549,
|
|
1875, 3901, 1850, 2399, 2028, 1724, 4889, 14551, 1184, 2132,
|
|
685, 3167
|
|
};
|
|
|
|
static const uint32 toc_shadow[15] =
|
|
{
|
|
10226, 70054, 11100, 12532, 12444, 11923, 10059, 10167, 10138, 13792,
|
|
11637, 2547, 2521, 3856, 900
|
|
};
|
|
|
|
static const uint32 toc_dungeon[13] =
|
|
{
|
|
2250, 22950, 16350, 24900, 13875, 19950, 13800, 15375, 17400, 17100,
|
|
3325, 6825, 25275
|
|
};
|
|
|
|
static const uint32 toc_ffight[26] =
|
|
{
|
|
11994, 9742, 10136, 9685, 9553, 14588, 9430, 8721, 9975, 9764,
|
|
9704, 12796, 585, 754, 951, 624, 9047, 1068, 817, 9191, 1024,
|
|
14562, 10320, 8627, 3795, 3047
|
|
};
|
|
|
|
static const uint32 toc_ffightj[29] =
|
|
{
|
|
11994, 9752, 10119, 9690, 9567, 14575, 9431, 8731, 9965, 9763,
|
|
9716, 12791, 579, 751, 958, 630, 9050, 1052, 825, 9193, 1026,
|
|
14553, 9834, 10542, 1699, 1792, 1781, 3783, 3052
|
|
};
|
|
|
|
|
|
/* supported audio file extensions */
|
|
static const char extensions[SUPPORTED_EXT][16] =
|
|
{
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
"%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",
|
|
"_%02d.wav",
|
|
" - %02d.wav",
|
|
"%d.wav",
|
|
" %d.wav",
|
|
"-%d.wav",
|
|
"_%d.wav",
|
|
" - %d.wav"
|
|
};
|
|
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
|
|
static int seek64_wrap(void *f,ogg_int64_t off,int whence){
|
|
return cdStreamSeek(f,off,whence);
|
|
}
|
|
|
|
static ov_callbacks cb =
|
|
{
|
|
(size_t (*)(void *, size_t, size_t, void *)) cdStreamRead,
|
|
(int (*)(void *, ogg_int64_t, int)) seek64_wrap,
|
|
(int (*)(void *)) cdStreamClose,
|
|
(long (*)(void *)) cdStreamTell
|
|
};
|
|
|
|
#ifdef DISABLE_MANY_OGG_OPEN_FILES
|
|
static void ogg_free(int i)
|
|
{
|
|
/* clear OGG file descriptor to prevent file from being closed */
|
|
cdd.toc.tracks[i].vf.datasource = NULL;
|
|
|
|
/* close VORBIS file structure */
|
|
ov_clear(&cdd.toc.tracks[i].vf);
|
|
|
|
/* indicates that the track is a seekable VORBIS file */
|
|
cdd.toc.tracks[i].vf.seekable = 1;
|
|
|
|
/* reset file reading position */
|
|
cdStreamSeek(cdd.toc.tracks[i].fd, 0, SEEK_SET);
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|
|
void cdd_init(int samplerate)
|
|
{
|
|
/* CD-DA is running by default at 44100 Hz */
|
|
/* Audio stream is resampled to desired rate using Blip Buffer */
|
|
blip_set_rates(snd.blips[2], 44100, samplerate);
|
|
}
|
|
|
|
void cdd_reset(void)
|
|
{
|
|
/* reset drive access latency */
|
|
cdd.latency = 0;
|
|
|
|
/* reset track index */
|
|
cdd.index = 0;
|
|
|
|
/* reset logical block address */
|
|
cdd.lba = 0;
|
|
|
|
/* reset status */
|
|
cdd.status = cdd.loaded ? CD_TOC : NO_DISC;
|
|
|
|
/* reset CD-DA fader (full volume) */
|
|
cdd.fader[0] = cdd.fader[1] = 0x400;
|
|
|
|
/* clear CD-DA output */
|
|
cdd.audio[0] = cdd.audio[1] = 0;
|
|
}
|
|
|
|
int cdd_context_save(uint8 *state)
|
|
{
|
|
int bufferptr = 0;
|
|
unsigned int offset = 0;
|
|
|
|
save_param(&cdd.cycles, sizeof(cdd.cycles));
|
|
save_param(&cdd.latency, sizeof(cdd.latency));
|
|
save_param(&cdd.index, sizeof(cdd.index));
|
|
save_param(&cdd.lba, sizeof(cdd.lba));
|
|
save_param(&cdd.scanOffset, sizeof(cdd.scanOffset));
|
|
save_param(&cdd.fader, sizeof(cdd.fader));
|
|
save_param(&cdd.status, sizeof(cdd.status));
|
|
|
|
/* current track is an audio track ? */
|
|
if (cdd.toc.tracks[cdd.index].type == TYPE_AUDIO)
|
|
{
|
|
/* get file read offset */
|
|
#if defined(USE_LIBCHDR)
|
|
if (cdd.chd.file)
|
|
{
|
|
/* CHD file offset */
|
|
offset = cdd.chd.hunkofs;
|
|
}
|
|
else
|
|
#endif
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[cdd.index].vf.seekable)
|
|
{
|
|
/* VORBIS file sample offset */
|
|
offset = ov_pcm_tell(&cdd.toc.tracks[cdd.index].vf);
|
|
}
|
|
else
|
|
#endif
|
|
if (cdd.toc.tracks[cdd.index].fd)
|
|
{
|
|
/* PCM file offset */
|
|
offset = cdStreamTell(cdd.toc.tracks[cdd.index].fd);
|
|
}
|
|
}
|
|
|
|
save_param(&offset, sizeof(offset));
|
|
save_param(&cdd.audio, sizeof(cdd.audio));
|
|
|
|
return bufferptr;
|
|
}
|
|
|
|
int cdd_context_load(uint8 *state, char *version)
|
|
{
|
|
unsigned int offset, lba, index;
|
|
int bufferptr = 0;
|
|
|
|
load_param(&cdd.cycles, sizeof(cdd.cycles));
|
|
load_param(&cdd.latency, sizeof(cdd.latency));
|
|
load_param(&index, sizeof(cdd.index));
|
|
load_param(&lba, sizeof(cdd.lba));
|
|
load_param(&cdd.scanOffset, sizeof(cdd.scanOffset));
|
|
load_param(&cdd.fader, sizeof(cdd.fader));
|
|
load_param(&cdd.status, sizeof(cdd.status));
|
|
|
|
/* update current sector */
|
|
cdd.lba = lba;
|
|
|
|
/* support for previous state version (1.7.5) */
|
|
if ((version[11] == 0x31) && (version[13] == 0x37) && (version[15] == 0x35))
|
|
{
|
|
/* current track is an audio track ? */
|
|
if (cdd.toc.tracks[index].type == TYPE_AUDIO)
|
|
{
|
|
/* stay within track limits when seeking files */
|
|
if (lba < cdd.toc.tracks[index].start)
|
|
{
|
|
lba = cdd.toc.tracks[index].start;
|
|
}
|
|
|
|
/* seek to current track sector */
|
|
cdd_seek_audio(index, lba);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
load_param(&offset, sizeof(offset));
|
|
load_param(&cdd.audio, sizeof(cdd.audio));
|
|
|
|
/* current track is an audio track ? */
|
|
if (cdd.toc.tracks[index].type == TYPE_AUDIO)
|
|
{
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
#ifdef DISABLE_MANY_OGG_OPEN_FILES
|
|
/* check if track index has changed */
|
|
if (index != cdd.index)
|
|
{
|
|
/* close previous track VORBIS file structure to save memory */
|
|
if (cdd.toc.tracks[cdd.index].vf.datasource)
|
|
{
|
|
ogg_free(cdd.index);
|
|
}
|
|
|
|
/* open current track VORBIS file */
|
|
if (cdd.toc.tracks[index].vf.seekable)
|
|
{
|
|
ov_open_callbacks(cdd.toc.tracks[index].fd,&cdd.toc.tracks[index].vf,0,0,cb);
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
/* seek to current file read offset */
|
|
#if defined(USE_LIBCHDR)
|
|
if (cdd.chd.file)
|
|
{
|
|
/* CHD file offset */
|
|
cdd.chd.hunkofs = offset;
|
|
}
|
|
else
|
|
#endif
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[index].vf.seekable)
|
|
{
|
|
/* VORBIS file sample offset */
|
|
ov_pcm_seek(&cdd.toc.tracks[index].vf, offset);
|
|
}
|
|
else
|
|
#endif
|
|
if (cdd.toc.tracks[index].fd)
|
|
{
|
|
/* PCM file offset */
|
|
cdStreamSeek(cdd.toc.tracks[index].fd, offset, SEEK_SET);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* seek to current subcode position */
|
|
if (cdd.toc.sub)
|
|
{
|
|
/* 96 bytes per sector */
|
|
cdStreamSeek(cdd.toc.sub, lba * 96, SEEK_SET);
|
|
}
|
|
|
|
/* update current track index */
|
|
cdd.index = index;
|
|
|
|
return bufferptr;
|
|
}
|
|
|
|
int cdd_load(char *filename, char *header)
|
|
{
|
|
char fname[256+10];
|
|
char line[128];
|
|
char *ptr, *lptr;
|
|
cdStream *fd;
|
|
|
|
/* assume normal CD image file by default */
|
|
int isCDfile = 1;
|
|
int isMSDfile = 0;
|
|
|
|
/* first unmount any loaded disc */
|
|
cdd_unload();
|
|
|
|
/* open file */
|
|
fd = cdStreamOpen(filename);
|
|
if (!fd)
|
|
{
|
|
/* do not return an error as this could be a ROM loaded in memory */
|
|
/* which should be handled by load_archive function */
|
|
return (0);
|
|
}
|
|
|
|
#if defined(USE_LIBCHDR)
|
|
if (!memcmp("chd", &filename[strlen(filename) - 3], 3) || !memcmp("CHD", &filename[strlen(filename) - 3], 3))
|
|
{
|
|
int sectors = 0;
|
|
char metadata[256];
|
|
const chd_header *head;
|
|
|
|
/* open CHD file */
|
|
if (chd_open_file(fd, CHD_OPEN_READ, NULL, &cdd.chd.file) != CHDERR_NONE)
|
|
{
|
|
chd_close(cdd.chd.file);
|
|
cdStreamClose(fd);
|
|
return -1;
|
|
}
|
|
|
|
/* retrieve CHD header */
|
|
head = chd_get_header(cdd.chd.file);
|
|
|
|
/* detect invalid hunk size */
|
|
if ((head->hunkbytes == 0) || (head->hunkbytes % CD_FRAME_SIZE))
|
|
{
|
|
chd_close(cdd.chd.file);
|
|
cdStreamClose(fd);
|
|
return -1;
|
|
}
|
|
|
|
/* allocate hunk buffer */
|
|
cdd.chd.hunk = (uint8 *)malloc(head->hunkbytes);
|
|
if (!cdd.chd.hunk)
|
|
{
|
|
chd_close(cdd.chd.file);
|
|
cdStreamClose(fd);
|
|
return -1;
|
|
}
|
|
|
|
/* initialize hunk size (usually fixed to 8 sectors) */
|
|
cdd.chd.hunkbytes = head->hunkbytes;
|
|
|
|
/* initialize buffered hunk index */
|
|
cdd.chd.hunknum = -1;
|
|
|
|
/* retrieve tracks informations */
|
|
for (cdd.toc.last = 0; cdd.toc.last < 99; cdd.toc.last++)
|
|
{
|
|
int tracknum = 0, frames = 0, pregap = 0, postgap = 0;
|
|
char type[16], subtype[16], pgtype[16], pgsub[16];
|
|
type[0] = subtype[0] = pgtype[0] = pgsub[0] = 0;
|
|
|
|
/* attempt fetch either complete or partial metadata for current track */
|
|
if (chd_get_metadata(cdd.chd.file, CDROM_TRACK_METADATA2_TAG, cdd.toc.last, metadata, 256, 0, 0, 0) == CHDERR_NONE)
|
|
{
|
|
if (sscanf(metadata, CDROM_TRACK_METADATA2_FORMAT, &tracknum, &type[0], &subtype[0], &frames, &pregap, &pgtype[0], &pgsub[0], &postgap) != 8)
|
|
break;
|
|
}
|
|
else if (chd_get_metadata(cdd.chd.file, CDROM_TRACK_METADATA_TAG, cdd.toc.last, metadata, 256, 0, 0, 0) == CHDERR_NONE)
|
|
{
|
|
if (sscanf(metadata, CDROM_TRACK_METADATA_FORMAT, &tracknum, &type[0], &subtype[0], &frames) != 4)
|
|
break;
|
|
}
|
|
|
|
/* no more track */
|
|
else break;
|
|
|
|
/* detect out of order track number or invalid parameter */
|
|
if ((tracknum != (cdd.toc.last + 1)) || (frames < 0) || (pregap < 0) || (postgap < 0))
|
|
break;
|
|
|
|
/* detect track type */
|
|
if (cdd.toc.last)
|
|
{
|
|
/* CD-ROM track supported only for first track */
|
|
if (strcmp(type, "AUDIO"))
|
|
break;
|
|
|
|
/* Audio track start LBA (adjusted with pregap length) */
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end + pregap;
|
|
}
|
|
else
|
|
{
|
|
if (!strcmp(type, "MODE1_RAW"))
|
|
{
|
|
/* Mode 1 RAW format (2352 bytes data blocks) */
|
|
cdd.sectorSize = 2352;
|
|
cdd.toc.tracks[0].type = TYPE_MODE1;
|
|
}
|
|
else if (!strcmp(type, "MODE1"))
|
|
{
|
|
/* Mode 1 COOKED format (2048 bytes data blocks) */
|
|
cdd.sectorSize = 2048;
|
|
cdd.toc.tracks[0].type = TYPE_MODE1;
|
|
}
|
|
else if (!strcmp(type, "MODE2_RAW"))
|
|
{
|
|
/* Mode 2 RAW format (2352 bytes data blocks) */
|
|
cdd.sectorSize = 2352;
|
|
cdd.toc.tracks[0].type = TYPE_MODE2;
|
|
}
|
|
else if (strcmp(type, "AUDIO"))
|
|
{
|
|
/* unsupported track format */
|
|
break;
|
|
}
|
|
|
|
/* First track start LBA (2s pause assumed by default) */
|
|
cdd.toc.tracks[0].start = 0;
|
|
}
|
|
|
|
/* detect pregap type */
|
|
if (pgtype[0] != 'V')
|
|
{
|
|
/* clear pause length for further calculations (not included in CHD file) */
|
|
pregap = 0;
|
|
}
|
|
|
|
/* track end LBA (remove included pause from CHD track length) */
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + frames - pregap;
|
|
|
|
/* CHD file offset for current track */
|
|
cdd.toc.tracks[cdd.toc.last].offset = (sectors + pregap - cdd.toc.tracks[cdd.toc.last].start) * CD_FRAME_SIZE;
|
|
|
|
/* update TOC end with postgap length */
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end + postgap;
|
|
|
|
/* update CHD file sector count (adjusted with end of the track padding) */
|
|
sectors += (((frames + CD_TRACK_PADDING - 1) / CD_TRACK_PADDING) * CD_TRACK_PADDING);
|
|
|
|
/* indicate valid track file */
|
|
cdd.toc.tracks[cdd.toc.last].fd = fd;
|
|
}
|
|
|
|
/* valid CD-ROM image file ? */
|
|
if (cdd.sectorSize)
|
|
{
|
|
/* read first chunk of data */
|
|
cdd.chd.hunknum = cdd.toc.tracks[0].offset / cdd.chd.hunkbytes;
|
|
chd_read(cdd.chd.file, cdd.chd.hunknum, cdd.chd.hunk);
|
|
|
|
/* copy CD image header + security code (skip RAW sector 16-byte header) */
|
|
memcpy(header, cdd.chd.hunk + (cdd.toc.tracks[0].offset % cdd.chd.hunkbytes) + ((cdd.sectorSize == 2048) ? 0 : 16), 0x210);
|
|
}
|
|
|
|
/* valid CD image ? */
|
|
if (cdd.toc.last && (cdd.toc.end < (100*60*75)))
|
|
{
|
|
/* Lead-out */
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
|
|
/* CD mounted */
|
|
cdd.loaded = HW_ADDON_MEGACD;
|
|
return 1;
|
|
}
|
|
|
|
/* invalid CHD file */
|
|
chd_close(cdd.chd.file);
|
|
cdStreamClose(fd);
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
/* save a copy of base filename (max. 255 characters) */
|
|
strncpy(fname, filename, 255);
|
|
fname[256] = 0;
|
|
|
|
/* check loaded file extension */
|
|
if (memcmp("cue", &filename[strlen(filename) - 3], 3) && memcmp("CUE", &filename[strlen(filename) - 3], 3))
|
|
{
|
|
int len;
|
|
|
|
static const uint8 sync[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
|
|
|
|
/* read first 16 bytes */
|
|
cdStreamRead(header, 0x10, 1, fd);
|
|
|
|
/* auto-detect valid Sega CD image */
|
|
if (!memcmp("SEGADISCSYSTEM", header, 14))
|
|
{
|
|
/* COOKED CD-ROM image (2048 bytes data blocks) */
|
|
cdd.sectorSize = 2048;
|
|
|
|
/* CD-ROM Mode 1 by default */
|
|
cdd.toc.tracks[0].type = TYPE_MODE1;
|
|
}
|
|
|
|
/* auto-detect CD-ROM synchro pattern */
|
|
else if (!memcmp(sync, header, 12))
|
|
{
|
|
/* RAW CD-ROM image (2352 bytes data blocks) */
|
|
cdd.sectorSize = 2352;
|
|
|
|
/* auto-detect CD-ROM mode from block header (byte 15) */
|
|
cdd.toc.tracks[0].type = header[15];
|
|
|
|
/* read next 16 bytes (start of user data) */
|
|
cdStreamRead(header, 0x10, 1, fd);
|
|
}
|
|
|
|
/* supported CD-ROM image file ? */
|
|
if ((cdd.toc.tracks[0].type == TYPE_MODE1) || (cdd.toc.tracks[0].type == TYPE_MODE2))
|
|
{
|
|
/* read Sega CD image header + security code */
|
|
cdStreamRead(header + 0x10, 0x200, 1, fd);
|
|
|
|
/* initialize first track file descriptor */
|
|
cdd.toc.tracks[0].fd = fd;
|
|
|
|
/* DATA track end LBA (based on DATA file length) */
|
|
cdStreamSeek(fd, 0, SEEK_END);
|
|
cdd.toc.tracks[0].end = cdStreamTell(fd) / cdd.sectorSize;
|
|
|
|
/* DATA track length should be at least 2s (BIOS requirement) */
|
|
if (cdd.toc.tracks[0].end < 150)
|
|
{
|
|
cdd.toc.tracks[0].end = 150;
|
|
}
|
|
|
|
/* DATA track start LBA (logical block 0) */
|
|
cdStreamSeek(fd, 0, SEEK_SET);
|
|
cdd.toc.tracks[0].start = 0;
|
|
|
|
/* initialize TOC */
|
|
cdd.toc.end = cdd.toc.tracks[0].end;
|
|
cdd.toc.last = 1;
|
|
}
|
|
else
|
|
{
|
|
/* this is not a supported CD-ROM image file */
|
|
isCDfile = 0;
|
|
|
|
/* close file */
|
|
cdStreamClose(fd);
|
|
}
|
|
|
|
/* automatically try to mount CD associated CUE file */
|
|
len = strlen(fname);
|
|
while ((len && (fname[len] != '.')) || (len > 251)) len--;
|
|
strcpy(&fname[len], ".cue");
|
|
fd = cdStreamOpen(fname);
|
|
}
|
|
|
|
/* parse CUE file */
|
|
if (fd)
|
|
{
|
|
int mm, ss, bb, pregap = 0;
|
|
int index = 0;
|
|
|
|
/* DATA track already loaded ? */
|
|
if (cdd.toc.last)
|
|
{
|
|
/* skip first track */
|
|
while (cdStreamGets(line, 128, fd))
|
|
{
|
|
if (strstr(line, "INDEX 01") && !strstr(line, "INDEX 1"))
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* read lines until end of file */
|
|
while (cdStreamGets(line, 128, fd))
|
|
{
|
|
/* skip any SPACE characters */
|
|
lptr = line;
|
|
while (*lptr == 0x20) lptr++;
|
|
|
|
/* decode FILE commands */
|
|
if (!(memcmp(lptr, "FILE", 4)))
|
|
{
|
|
/* retrieve current path */
|
|
ptr = fname + strlen(fname) - 1;
|
|
while ((ptr - fname) && (*ptr != '/') && (*ptr != '\\')) ptr--;
|
|
if (ptr - fname) ptr++;
|
|
|
|
/* skip "FILE" attribute */
|
|
lptr += 4;
|
|
|
|
/* skip SPACE characters */
|
|
while (*lptr == 0x20) lptr++;
|
|
|
|
/* retrieve full filename */
|
|
if (*lptr == '\"')
|
|
{
|
|
/* skip first DOUBLE QUOTE character */
|
|
lptr++;
|
|
while ((*lptr != '\"') && (lptr <= (line + 128)) && (ptr < (fname + 255)))
|
|
*ptr++ = *lptr++;
|
|
}
|
|
else
|
|
{
|
|
/* no DOUBLE QUOTE used */
|
|
while ((*lptr != 0x20) && (lptr <= (line + 128)) && (ptr < (fname + 255)))
|
|
*ptr++ = *lptr++;
|
|
}
|
|
*ptr = 0;
|
|
|
|
/* open current track file descriptor */
|
|
cdd.toc.tracks[cdd.toc.last].fd = cdStreamOpen(fname);
|
|
if (!cdd.toc.tracks[cdd.toc.last].fd)
|
|
{
|
|
/* error opening file */
|
|
break;
|
|
}
|
|
|
|
/* reset current file PREGAP length */
|
|
pregap = 0;
|
|
|
|
/* reset current track file read offset */
|
|
cdd.toc.tracks[cdd.toc.last].offset = 0;
|
|
|
|
/* check supported audio file types */
|
|
if (!strstr(lptr,"BINARY") && !strstr(lptr,"MOTOROLA"))
|
|
{
|
|
/* read file header */
|
|
unsigned char head[12];
|
|
cdStreamRead(head, 12, 1, cdd.toc.tracks[cdd.toc.last].fd);
|
|
cdStreamSeek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_SET);
|
|
|
|
/* autodetect WAVE file */
|
|
if (!memcmp(head, "RIFF", 4) && !memcmp(head + 8, "WAVE", 4))
|
|
{
|
|
/* look for 'data' chunk */
|
|
int chunkSize, dataOffset = 0;
|
|
cdStreamSeek(cdd.toc.tracks[cdd.toc.last].fd, 12, SEEK_SET);
|
|
while (cdStreamRead(head, 8, 1, cdd.toc.tracks[cdd.toc.last].fd))
|
|
{
|
|
if (!memcmp(head, "data", 4))
|
|
{
|
|
dataOffset = cdStreamTell(cdd.toc.tracks[cdd.toc.last].fd);
|
|
cdStreamSeek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_SET);
|
|
break;
|
|
}
|
|
chunkSize = head[4] + (head[5] << 8) + (head[6] << 16) + (head[7] << 24);
|
|
cdStreamSeek(cdd.toc.tracks[cdd.toc.last].fd, chunkSize, SEEK_CUR);
|
|
}
|
|
|
|
/* check if 'data' chunk has not been found */
|
|
if (!dataOffset)
|
|
{
|
|
/* invalid WAVE file */
|
|
cdStreamClose(cdd.toc.tracks[cdd.toc.last].fd);
|
|
cdd.toc.tracks[cdd.toc.last].fd = 0;
|
|
break;
|
|
}
|
|
|
|
/* adjust current track file read offset with WAVE header length */
|
|
cdd.toc.tracks[cdd.toc.last].offset -= dataOffset;
|
|
}
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
else if (!ov_open_callbacks(cdd.toc.tracks[cdd.toc.last].fd,&cdd.toc.tracks[cdd.toc.last].vf,0,0,cb))
|
|
{
|
|
/* 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 VORBIS file format (stereo @44.1kHz only) */
|
|
ov_clear(&cdd.toc.tracks[cdd.toc.last].vf);
|
|
cdd.toc.tracks[cdd.toc.last].fd = 0;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
else
|
|
{
|
|
/* unsupported audio file */
|
|
cdStreamClose(cdd.toc.tracks[cdd.toc.last].fd);
|
|
cdd.toc.tracks[cdd.toc.last].fd = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* decode TRACK commands */
|
|
else if ((sscanf(lptr, "TRACK %02d %*s", &bb)) || (sscanf(lptr, "TRACK %d %*s", &bb)))
|
|
{
|
|
/* autodetect DATA track type (first track only) */
|
|
if (!cdd.toc.last)
|
|
{
|
|
if (strstr(lptr,"MODE1/2048"))
|
|
{
|
|
/* Mode 1 COOKED format (2048 bytes / block) */
|
|
cdd.sectorSize = 2048;
|
|
cdd.toc.tracks[0].type = TYPE_MODE1;
|
|
}
|
|
else if (strstr(lptr,"MODE1/2352"))
|
|
{
|
|
/* Mode 1 RAW format (2352 bytes / block) */
|
|
cdd.sectorSize = 2352;
|
|
cdd.toc.tracks[0].type = TYPE_MODE1;
|
|
}
|
|
else if (strstr(lptr,"MODE2/2352"))
|
|
{
|
|
/* Mode 2 RAW format (2352 bytes / block) */
|
|
cdd.sectorSize = 2352;
|
|
cdd.toc.tracks[0].type = TYPE_MODE2;
|
|
}
|
|
|
|
if (cdd.sectorSize)
|
|
{
|
|
if (cdd.sectorSize == 2352)
|
|
{
|
|
/* skip 16-byte header */
|
|
cdStreamSeek(cdd.toc.tracks[0].fd, 0x10, SEEK_SET);
|
|
}
|
|
|
|
/* read CD image header + security code */
|
|
cdStreamRead(header, 0x210, 1, cdd.toc.tracks[0].fd);
|
|
cdStreamSeek(cdd.toc.tracks[0].fd, 0, SEEK_SET);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* check if same file is used for consecutive tracks */
|
|
if (!cdd.toc.tracks[cdd.toc.last].fd)
|
|
{
|
|
/* clear previous track end time */
|
|
cdd.toc.tracks[cdd.toc.last - 1].end = 0;
|
|
}
|
|
}
|
|
|
|
/* save current track index */
|
|
index = cdd.toc.last;
|
|
}
|
|
|
|
/* decode REM LOOP xxx command (MegaSD specific command) */
|
|
else if (sscanf(lptr, "REM LOOP %d", &bb) == 1)
|
|
{
|
|
cdd.toc.tracks[index].loopEnabled = 1;
|
|
cdd.toc.tracks[index].loopOffset = bb;
|
|
isMSDfile = 1;
|
|
}
|
|
|
|
/* decode REM LOOP command (MegaSD specific command) */
|
|
else if (strstr(lptr,"REM LOOP"))
|
|
{
|
|
cdd.toc.tracks[index].loopEnabled = 1;
|
|
isMSDfile = 1;
|
|
}
|
|
|
|
/* decode REM NOLOOP command (MegaSD specific command) */
|
|
else if (strstr(lptr,"REM NOLOOP"))
|
|
{
|
|
cdd.toc.tracks[index].loopEnabled = -1;
|
|
isMSDfile = 1;
|
|
}
|
|
|
|
/* decode PREGAP commands */
|
|
else if (sscanf(lptr, "PREGAP %02d:%02d:%02d", &mm, &ss, &bb) == 3)
|
|
{
|
|
/* increment current file PREGAP length */
|
|
pregap += bb + ss*75 + mm*60*75;
|
|
}
|
|
|
|
/* decode INDEX commands */
|
|
else if ((sscanf(lptr, "INDEX 00 %02d:%02d:%02d", &mm, &ss, &bb) == 3) ||
|
|
(sscanf(lptr, "INDEX 0 %02d:%02d:%02d", &mm, &ss, &bb) == 3))
|
|
{
|
|
/* check if previous track end time needs to be set */
|
|
if (cdd.toc.last && !cdd.toc.tracks[cdd.toc.last - 1].end)
|
|
{
|
|
/* set previous track end time (current file absolute time + PREGAP length) */
|
|
cdd.toc.tracks[cdd.toc.last - 1].end = bb + ss*75 + mm*60*75 + pregap;
|
|
}
|
|
}
|
|
else if ((sscanf(lptr, "INDEX 01 %02d:%02d:%02d", &mm, &ss, &bb) == 3) ||
|
|
(sscanf(lptr, "INDEX 1 %02d:%02d:%02d", &mm, &ss, &bb) == 3))
|
|
{
|
|
/* adjust current track file read offset with current file PREGAP length (only used for AUDIO track) */
|
|
cdd.toc.tracks[cdd.toc.last].offset += pregap * 2352;
|
|
|
|
/* check if a single file is used for consecutive tracks */
|
|
if (!cdd.toc.tracks[cdd.toc.last].fd && cdd.toc.last)
|
|
{
|
|
/* use common file descriptor */
|
|
cdd.toc.tracks[cdd.toc.last].fd = cdd.toc.tracks[cdd.toc.last - 1].fd;
|
|
|
|
/* current track start time (based on current file absolute time + PREGAP length) */
|
|
cdd.toc.tracks[cdd.toc.last].start = bb + ss*75 + mm*60*75 + pregap;
|
|
|
|
/* check if previous track end time needs to be set */
|
|
if (!cdd.toc.tracks[cdd.toc.last - 1].end)
|
|
{
|
|
/* set previous track end time (based on current track start time, ignoring any "PREGAP"-type pause if no INDEX00) */
|
|
cdd.toc.tracks[cdd.toc.last - 1].end = cdd.toc.tracks[cdd.toc.last].start;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* current file start time (based on previous track end time + PREGAP length) */
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end + pregap;
|
|
|
|
/* adjust current track file read offset with previous track end time (only used for AUDIO track) */
|
|
cdd.toc.tracks[cdd.toc.last].offset += cdd.toc.end * 2352;
|
|
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[cdd.toc.last].vf.datasource)
|
|
{
|
|
/* convert read offset to PCM sample offset */
|
|
cdd.toc.tracks[cdd.toc.last].offset = cdd.toc.tracks[cdd.toc.last].offset / 4;
|
|
|
|
/* current track end time */
|
|
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;
|
|
cdd.toc.tracks[cdd.toc.last].offset = 0;
|
|
break;
|
|
}
|
|
|
|
#ifdef DISABLE_MANY_OGG_OPEN_FILES
|
|
/* close VORBIS file structure to save memory */
|
|
ogg_free(cdd.toc.last);
|
|
#endif
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
/* current track end time */
|
|
cdStreamSeek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_END);
|
|
if (cdd.toc.tracks[cdd.toc.last].type)
|
|
{
|
|
/* DATA track length */
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + (cdStreamTell(cdd.toc.tracks[cdd.toc.last].fd) / cdd.sectorSize);
|
|
}
|
|
else
|
|
{
|
|
/* AUDIO track length */
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + (cdStreamTell(cdd.toc.tracks[cdd.toc.last].fd) / 2352);
|
|
}
|
|
cdStreamSeek(cdd.toc.tracks[cdd.toc.last].fd, 0, SEEK_SET);
|
|
}
|
|
|
|
/* adjust track start time (based on current file start time + index absolute time) */
|
|
cdd.toc.tracks[cdd.toc.last].start += (bb + ss*75 + mm*60*75);
|
|
|
|
/* update TOC end */
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
}
|
|
|
|
/* increment track number */
|
|
cdd.toc.last++;
|
|
|
|
/* max. 99 tracks */
|
|
if (cdd.toc.last == 99) break;
|
|
}
|
|
}
|
|
|
|
/* check if last track end time needs to be set */
|
|
if (cdd.toc.last && !cdd.toc.tracks[cdd.toc.last - 1].end)
|
|
{
|
|
/* adjust TOC end with current file PREGAP length */
|
|
cdd.toc.end += pregap;
|
|
|
|
/* last track end time */
|
|
cdd.toc.tracks[cdd.toc.last - 1].end = cdd.toc.end;
|
|
}
|
|
|
|
/* close any incomplete track file */
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[cdd.toc.last].vf.datasource)
|
|
{
|
|
ov_clear(&cdd.toc.tracks[cdd.toc.last].vf);
|
|
}
|
|
else
|
|
#endif
|
|
if (cdd.toc.tracks[cdd.toc.last].fd)
|
|
{
|
|
cdStreamClose(cdd.toc.tracks[cdd.toc.last].fd);
|
|
}
|
|
|
|
/* close CUE file */
|
|
cdStreamClose(fd);
|
|
}
|
|
else if (cdd.toc.last)
|
|
{
|
|
int i, offset = 1;
|
|
|
|
/* set pointer at the end of filename */
|
|
ptr = fname + strlen(fname) - 4;
|
|
|
|
/* autodetect audio track file extensions */
|
|
for (i=0; i<SUPPORTED_EXT; i++)
|
|
{
|
|
/* auto-detect wrong initial track index */
|
|
sprintf(ptr, extensions[i], cdd.toc.last);
|
|
fd = cdStreamOpen(fname);
|
|
if (fd)
|
|
{
|
|
offset = 0;
|
|
break;
|
|
}
|
|
|
|
sprintf(ptr, extensions[i], cdd.toc.last + 1);
|
|
fd = cdStreamOpen(fname);
|
|
if (fd) break;
|
|
}
|
|
|
|
/* repeat until no more valid track files can be found */
|
|
while (fd)
|
|
{
|
|
/* read file header */
|
|
unsigned char head[12];
|
|
cdStreamRead(head, 12, 1, fd);
|
|
cdStreamSeek(fd, 0, SEEK_SET);
|
|
|
|
/* autodetect WAVE file */
|
|
if (!memcmp(head, "RIFF", 4) && !memcmp(head + 8, "WAVE", 4))
|
|
{
|
|
/* look for 'data' chunk */
|
|
int chunkSize, dataOffset = 0;
|
|
cdStreamSeek(fd, 12, SEEK_SET);
|
|
while (cdStreamRead(head, 8, 1, fd))
|
|
{
|
|
if (!memcmp(head, "data", 4))
|
|
{
|
|
dataOffset = cdStreamTell(fd);
|
|
cdStreamSeek(fd, 0, SEEK_SET);
|
|
break;
|
|
}
|
|
chunkSize = head[4] + (head[5] << 8) + (head[6] << 16) + (head[7] << 24);
|
|
cdStreamSeek(fd, chunkSize, SEEK_CUR);
|
|
}
|
|
|
|
/* check if 'data' chunk has not been found */
|
|
if (!dataOffset)
|
|
{
|
|
/* invalid WAVE file */
|
|
cdStreamClose(fd);
|
|
break;
|
|
}
|
|
|
|
/* initialize current track file descriptor */
|
|
cdd.toc.tracks[cdd.toc.last].fd = fd;
|
|
|
|
/* initialize current track start time (based on previous track end time) */
|
|
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 time */
|
|
cdStreamSeek(fd, 0, SEEK_END);
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + ((cdStreamTell(fd) - dataOffset + 2351) / 2352);
|
|
|
|
/* initialize file read offset for current track */
|
|
cdd.toc.tracks[cdd.toc.last].offset = cdd.toc.tracks[cdd.toc.last].start * 2352;
|
|
|
|
/* auto-detect PAUSE within audio files */
|
|
cdStreamSeek(fd, 100 * 2352, SEEK_SET);
|
|
cdStreamRead(head, 4, 1, fd);
|
|
cdStreamSeek(fd, 0, SEEK_SET);
|
|
if (*(int32 *)head == 0)
|
|
{
|
|
/* assume 2s PAUSE is included at the beginning of the file */
|
|
cdd.toc.tracks[cdd.toc.last].offset -= 150 * 2352;
|
|
cdd.toc.tracks[cdd.toc.last].end -= 150;
|
|
}
|
|
|
|
/* update TOC end */
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
|
|
/* adjust file read offset for current track with WAVE header length */
|
|
cdd.toc.tracks[cdd.toc.last].offset -= dataOffset;
|
|
|
|
/* increment track number */
|
|
cdd.toc.last++;
|
|
}
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
else if (!ov_open_callbacks(fd,&cdd.toc.tracks[cdd.toc.last].vf,0,0,cb))
|
|
{
|
|
/* 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 time (based on previous track end time) */
|
|
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 time */
|
|
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) + 587) / 588);
|
|
if (cdd.toc.tracks[cdd.toc.last].end <= cdd.toc.tracks[cdd.toc.last].start)
|
|
{
|
|
/* invalid file 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;
|
|
}
|
|
|
|
/* initialize file read offset for current track */
|
|
cdd.toc.tracks[cdd.toc.last].offset = cdd.toc.tracks[cdd.toc.last].start * 588;
|
|
|
|
/* auto-detect PAUSE within audio files */
|
|
ov_pcm_seek(&cdd.toc.tracks[cdd.toc.last].vf, 100 * 588);
|
|
#if defined(USE_LIBVORBIS)
|
|
ov_read(&cdd.toc.tracks[cdd.toc.last].vf, (char *)head, 32, 0, 2, 1, 0);
|
|
#else
|
|
ov_read(&cdd.toc.tracks[cdd.toc.last].vf, (char *)head, 32, 0);
|
|
#endif
|
|
ov_pcm_seek(&cdd.toc.tracks[cdd.toc.last].vf, 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;
|
|
}
|
|
|
|
#ifdef DISABLE_MANY_OGG_OPEN_FILES
|
|
/* close VORBIS file structure to save memory */
|
|
ogg_free(cdd.toc.last);
|
|
#endif
|
|
|
|
/* update TOC end */
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
|
|
/* increment track number */
|
|
cdd.toc.last++;
|
|
}
|
|
#endif
|
|
else
|
|
{
|
|
/* unsupported audio file format */
|
|
cdStreamClose(fd);
|
|
break;
|
|
}
|
|
|
|
/* max. 99 tracks */
|
|
if (cdd.toc.last == 99) break;
|
|
|
|
/* try to open next audio track file */
|
|
sprintf(ptr, extensions[i], cdd.toc.last + offset);
|
|
fd = cdStreamOpen(fname);
|
|
}
|
|
|
|
/* Valid CD-ROM Mode 1 track found ? */
|
|
if (cdd.toc.tracks[0].type == TYPE_MODE1)
|
|
{
|
|
/* simulate audio tracks if none found */
|
|
if (cdd.toc.last == 1)
|
|
{
|
|
/* some games require exact TOC infos */
|
|
if (strstr(header + 0x180,"T-95035") != NULL)
|
|
{
|
|
/* Snatcher */
|
|
cdd.toc.last = cdd.toc.end = 0;
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_snatcher[cdd.toc.last];
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while (cdd.toc.last < 21);
|
|
}
|
|
else if (strstr(header + 0x180,"T-127015") != NULL)
|
|
{
|
|
/* Lunar - The Silver Star */
|
|
cdd.toc.last = cdd.toc.end = 0;
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_lunar[cdd.toc.last];
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while (cdd.toc.last < 52);
|
|
}
|
|
else if (strstr(header + 0x180,"T-113045") != NULL)
|
|
{
|
|
/* Shadow of the Beast II */
|
|
cdd.toc.last = cdd.toc.end = 0;
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_shadow[cdd.toc.last];
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while (cdd.toc.last < 15);
|
|
}
|
|
else if (strstr(header + 0x180,"T-143025") != NULL)
|
|
{
|
|
/* Dungeon Explorer */
|
|
cdd.toc.last = cdd.toc.end = 0;
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_dungeon[cdd.toc.last];
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while (cdd.toc.last < 13);
|
|
}
|
|
else if (strstr(header + 0x180,"MK-4410") != NULL)
|
|
{
|
|
/* Final Fight CD (USA, Europe) */
|
|
cdd.toc.last = cdd.toc.end = 0;
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_ffight[cdd.toc.last];
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while (cdd.toc.last < 26);
|
|
}
|
|
else if (strstr(header + 0x180,"G-6013") != NULL)
|
|
{
|
|
/* Final Fight CD (Japan) */
|
|
cdd.toc.last = cdd.toc.end = 0;
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_ffightj[cdd.toc.last];
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while (cdd.toc.last < 29);
|
|
}
|
|
else if (strstr(header + 0x180,"T-06201-01") != NULL)
|
|
{
|
|
/* Sewer Shark (USA) (REV1) */
|
|
/* no audio track */
|
|
}
|
|
else
|
|
{
|
|
/* default TOC (99 tracks & 2s per audio tracks) */
|
|
do
|
|
{
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end + 2*75;
|
|
cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + 2*75;
|
|
cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end;
|
|
cdd.toc.last++;
|
|
}
|
|
while ((cdd.toc.last < 99) && (cdd.toc.end < 56*60*75));
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/* CD tracks found ? */
|
|
if (cdd.toc.last)
|
|
{
|
|
/* Lead-out */
|
|
cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end;
|
|
|
|
/* CD mounted */
|
|
cdd.loaded = isMSDfile ? HW_ADDON_MEGASD : HW_ADDON_MEGACD;
|
|
|
|
/* Automatically try to open associated subcode data file */
|
|
memcpy(&fname[strlen(fname) - 4], ".sub", 4);
|
|
cdd.toc.sub = cdStreamOpen(fname);
|
|
|
|
/* return 1 if loaded file is CD image file */
|
|
return (isCDfile);
|
|
}
|
|
|
|
/* no CD image file loaded */
|
|
return 0;
|
|
}
|
|
|
|
void cdd_unload(void)
|
|
{
|
|
if (cdd.loaded)
|
|
{
|
|
int i;
|
|
|
|
#if defined(USE_LIBCHDR)
|
|
chd_close(cdd.chd.file);
|
|
if (cdd.chd.hunk)
|
|
free(cdd.chd.hunk);
|
|
#endif
|
|
|
|
/* close CD tracks */
|
|
for (i=0; i<cdd.toc.last; i++)
|
|
{
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[i].vf.datasource)
|
|
{
|
|
/* close any opened VORBIS file */
|
|
ov_clear(&cdd.toc.tracks[i].vf);
|
|
}
|
|
else
|
|
#endif
|
|
if (cdd.toc.tracks[i].fd)
|
|
{
|
|
/* check if single file is used for consecutive tracks */
|
|
if ((i > 0) && (cdd.toc.tracks[i].fd == cdd.toc.tracks[i-1].fd))
|
|
{
|
|
/* skip track */
|
|
i++;
|
|
}
|
|
else
|
|
{
|
|
/* close file */
|
|
cdStreamClose(cdd.toc.tracks[i].fd);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* close any opened subcode file */
|
|
if (cdd.toc.sub)
|
|
cdStreamClose(cdd.toc.sub);
|
|
|
|
/* CD unloaded */
|
|
cdd.loaded = 0;
|
|
}
|
|
|
|
/* reset TOC */
|
|
memset(&cdd.toc, 0x00, sizeof(cdd.toc));
|
|
|
|
#if defined(USE_LIBCHDR)
|
|
/* reset CHD data */
|
|
memset(&cdd.chd, 0x00, sizeof(cdd.chd));
|
|
#endif
|
|
|
|
/* no CD-ROM track */
|
|
cdd.sectorSize = 0;
|
|
}
|
|
|
|
void cdd_read_data(uint8 *dst, uint8 *subheader)
|
|
{
|
|
/* only allow reading (first) CD-ROM track sectors */
|
|
if (cdd.toc.tracks[cdd.index].type && (cdd.lba >= 0))
|
|
{
|
|
#if defined(USE_LIBCHDR)
|
|
if (cdd.chd.file)
|
|
{
|
|
/* CHD file offset */
|
|
int offset = cdd.toc.tracks[0].offset + (cdd.lba * CD_FRAME_SIZE);
|
|
|
|
/* CHD hunk index */
|
|
int hunknum = offset / cdd.chd.hunkbytes;
|
|
|
|
/* update CHD hunk cache if necessary */
|
|
if (hunknum != cdd.chd.hunknum)
|
|
{
|
|
chd_read(cdd.chd.file, hunknum, cdd.chd.hunk);
|
|
cdd.chd.hunknum = hunknum;
|
|
}
|
|
|
|
/* check sector size */
|
|
if (cdd.sectorSize == 2048)
|
|
{
|
|
/* read Mode 1 user data (2048 bytes) */
|
|
memcpy(dst, cdd.chd.hunk + (offset % cdd.chd.hunkbytes), 2048);
|
|
}
|
|
else
|
|
{
|
|
/* check if sub-header is required (Mode 2 sector only) */
|
|
if (!subheader)
|
|
{
|
|
/* read Mode 1 user data (2048 bytes), skipping block sync pattern (12 bytes) + block header (4 bytes)*/
|
|
memcpy(dst, cdd.chd.hunk + (offset % cdd.chd.hunkbytes) + 12 + 4, 2048);
|
|
}
|
|
else
|
|
{
|
|
/* read Mode 2 sub-header (first 4 bytes), skipping block sync pattern (12 bytes) + block header (4 bytes)*/
|
|
memcpy(subheader, cdd.chd.hunk + (offset % cdd.chd.hunkbytes) + 12 + 4, 4);
|
|
|
|
/* read Mode 2 user data (max 2328 bytes), skipping Mode 2 sub-header (8 bytes) */
|
|
memcpy(dst, cdd.chd.hunk + (offset % cdd.chd.hunkbytes) + 12 + 4 + 8, 2328);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
/* check sector size */
|
|
if (cdd.sectorSize == 2048)
|
|
{
|
|
/* read Mode 1 user data (2048 bytes) */
|
|
cdStreamSeek(cdd.toc.tracks[0].fd, cdd.lba * 2048, SEEK_SET);
|
|
cdStreamRead(dst, 2048, 1, cdd.toc.tracks[0].fd);
|
|
}
|
|
else
|
|
{
|
|
/* check if sub-header is required (Mode 2 sector only) */
|
|
if (!subheader)
|
|
{
|
|
/* skip block sync pattern (12 bytes) + block header (4 bytes) then read Mode 1 user data (2048 bytes) */
|
|
cdStreamSeek(cdd.toc.tracks[0].fd, (cdd.lba * 2352) + 12 + 4, SEEK_SET);
|
|
cdStreamRead(dst, 2048, 1, cdd.toc.tracks[0].fd);
|
|
}
|
|
else
|
|
{
|
|
/* skip block sync pattern (12 bytes) + block header (4 bytes) + Mode 2 sub-header (first 4 bytes) then read Mode 2 sub-header (last 4 bytes) */
|
|
cdStreamSeek(cdd.toc.tracks[0].fd, (cdd.lba * 2352) + 12 + 4 + 4, SEEK_SET);
|
|
cdStreamRead(subheader, 4, 1, cdd.toc.tracks[0].fd);
|
|
|
|
/* read Mode 2 user data (max 2328 bytes) */
|
|
cdStreamRead(dst, 2328, 1, cdd.toc.tracks[0].fd);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void cdd_seek_audio(int index, int lba)
|
|
{
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
#ifdef DISABLE_MANY_OGG_OPEN_FILES
|
|
/* check if track index has changed */
|
|
if (index != cdd.index)
|
|
{
|
|
/* close previous track VORBIS file structure to save memory */
|
|
if (cdd.toc.tracks[cdd.index].vf.datasource)
|
|
{
|
|
ogg_free(cdd.index);
|
|
}
|
|
|
|
/* open current track VORBIS file */
|
|
if (cdd.toc.tracks[index].vf.seekable)
|
|
{
|
|
ov_open_callbacks(cdd.toc.tracks[index].fd,&cdd.toc.tracks[index].vf,0,0,cb);
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
/* seek to track position */
|
|
#if defined(USE_LIBCHDR)
|
|
if (cdd.chd.file)
|
|
{
|
|
/* CHD file offset */
|
|
cdd.chd.hunkofs = cdd.toc.tracks[index].offset + (lba * CD_FRAME_SIZE);
|
|
}
|
|
else
|
|
#endif
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[index].vf.seekable)
|
|
{
|
|
/* VORBIS AUDIO track */
|
|
ov_pcm_seek(&cdd.toc.tracks[index].vf, (lba * 588) - cdd.toc.tracks[index].offset);
|
|
}
|
|
else
|
|
#endif
|
|
if (cdd.toc.tracks[index].fd)
|
|
{
|
|
/* PCM AUDIO track */
|
|
cdStreamSeek(cdd.toc.tracks[index].fd, (lba * 2352) - cdd.toc.tracks[index].offset, SEEK_SET);
|
|
}
|
|
}
|
|
|
|
void cdd_read_audio(unsigned int samples)
|
|
{
|
|
/* previous audio outputs */
|
|
int prev_l = cdd.audio[0];
|
|
int prev_r = cdd.audio[1];
|
|
|
|
/* audio track playing ? */
|
|
if (!scd.regs[0x36>>1].byte.h && cdd.toc.tracks[cdd.index].fd)
|
|
{
|
|
int i, mul, l, r;
|
|
|
|
/* current CD-DA fader volume */
|
|
int curVol = cdd.fader[0];
|
|
|
|
/* CD-DA fader volume setup (0-1024) */
|
|
int endVol = cdd.fader[1];
|
|
|
|
/* read samples from current block */
|
|
#if defined(USE_LIBCHDR)
|
|
if (cdd.chd.file)
|
|
{
|
|
#ifndef LSB_FIRST
|
|
int16 *ptr = (int16 *) (cdd.chd.hunk + (cdd.chd.hunkofs % cdd.chd.hunkbytes));
|
|
#else
|
|
uint8 *ptr = cdd.chd.hunk + (cdd.chd.hunkofs % cdd.chd.hunkbytes);
|
|
#endif
|
|
|
|
/* process 16-bit (big-endian) stereo samples */
|
|
for (i=0; i<samples; i++)
|
|
{
|
|
/* CHD hunk index */
|
|
int hunknum = cdd.chd.hunkofs / cdd.chd.hunkbytes;
|
|
|
|
/* update CHD hunk cache if necessary */
|
|
if (hunknum != cdd.chd.hunknum)
|
|
{
|
|
chd_read(cdd.chd.file, hunknum, cdd.chd.hunk);
|
|
cdd.chd.hunknum = hunknum;
|
|
}
|
|
|
|
/* 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 & right channels */
|
|
#ifndef LSB_FIRST
|
|
l = ((ptr[0] * mul) / 1024);
|
|
r = ((ptr[1] * mul) / 1024);
|
|
ptr+=2;
|
|
#else
|
|
l = (((int16)((ptr[1] + ptr[0]*256)) * mul) / 1024);
|
|
r = (((int16)((ptr[3] + ptr[2]*256)) * mul) / 1024);
|
|
ptr+=4;
|
|
#endif
|
|
|
|
/* CD-DA output mixing volume (0-100%) */
|
|
l = (l * config.cdda_volume) / 100;
|
|
r = (r * config.cdda_volume) / 100;
|
|
|
|
/* update blip buffer */
|
|
blip_add_delta_fast(snd.blips[2], i, l-prev_l, r-prev_r);
|
|
prev_l = l;
|
|
prev_r = r;
|
|
|
|
/* update CHD file offset */
|
|
cdd.chd.hunkofs += 4;
|
|
|
|
/* detect end of sector data (2352 bytes) */
|
|
if ((cdd.chd.hunkofs % CD_FRAME_SIZE) == CD_MAX_SECTOR_DATA)
|
|
{
|
|
/* skip subcode data (96 bytes) */
|
|
cdd.chd.hunkofs += CD_MAX_SUBCODE_DATA;
|
|
|
|
/* reinitialize hunk cache pointer */
|
|
#ifndef LSB_FIRST
|
|
ptr = (int16 *) (cdd.chd.hunk + (cdd.chd.hunkofs % cdd.chd.hunkbytes));
|
|
#else
|
|
ptr = cdd.chd.hunk + (cdd.chd.hunkofs % cdd.chd.hunkbytes);
|
|
#endif
|
|
}
|
|
|
|
/* 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
|
|
#endif
|
|
#if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS)
|
|
if (cdd.toc.tracks[cdd.index].vf.datasource)
|
|
{
|
|
int len, done = 0;
|
|
int16 *ptr = (int16 *) (cdc.ram);
|
|
samples = samples * 4;
|
|
while (done < samples)
|
|
{
|
|
#ifdef USE_LIBVORBIS
|
|
len = ov_read(&cdd.toc.tracks[cdd.index].vf, (char *)(cdc.ram + done), samples - done, 0, 2, 1, 0);
|
|
#else
|
|
len = ov_read(&cdd.toc.tracks[cdd.index].vf, (char *)(cdc.ram + done), samples - done, 0);
|
|
#endif
|
|
if (len <= 0)
|
|
{
|
|
done = samples;
|
|
break;
|
|
}
|
|
done += len;
|
|
}
|
|
samples = done / 4;
|
|
|
|
/* process 16-bit (host-endian) stereo samples */
|
|
for (i=0; i<samples; i++)
|
|
{
|
|
/* 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 & right channels */
|
|
l = ((ptr[0] * mul) / 1024);
|
|
r = ((ptr[1] * mul) / 1024);
|
|
|
|
/* CD-DA output mixing volume (0-100%) */
|
|
l = (l * config.cdda_volume) / 100;
|
|
r = (r * config.cdda_volume) / 100;
|
|
|
|
/* update blip buffer */
|
|
blip_add_delta_fast(snd.blips[2], i, l-prev_l, r-prev_r);
|
|
prev_l = l;
|
|
prev_r = r;
|
|
ptr+=2;
|
|
|
|
/* 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
|
|
#endif
|
|
{
|
|
#ifdef LSB_FIRST
|
|
int16 *ptr = (int16 *) (cdc.ram);
|
|
#else
|
|
uint8 *ptr = cdc.ram;
|
|
#endif
|
|
cdStreamRead(cdc.ram, 1, samples * 4, cdd.toc.tracks[cdd.index].fd);
|
|
|
|
/* process 16-bit (little-endian) stereo samples */
|
|
for (i=0; i<samples; i++)
|
|
{
|
|
/* 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 & right channels */
|
|
#ifdef LSB_FIRST
|
|
l = ((ptr[0] * mul) / 1024);
|
|
r = ((ptr[1] * mul) / 1024);
|
|
ptr+=2;
|
|
#else
|
|
l = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024);
|
|
r = (((int16)((ptr[2] + ptr[3]*256)) * mul) / 1024);
|
|
ptr+=4;
|
|
#endif
|
|
|
|
/* CD-DA output mixing volume (0-100%) */
|
|
l = (l * config.cdda_volume) / 100;
|
|
r = (r * config.cdda_volume) / 100;
|
|
|
|
/* update blip buffer */
|
|
blip_add_delta_fast(snd.blips[2], i, l-prev_l, r-prev_r);
|
|
prev_l = l;
|
|
prev_r = r;
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* save current CD-DA fader volume */
|
|
cdd.fader[0] = curVol;
|
|
|
|
/* save last audio output for next frame */
|
|
cdd.audio[0] = prev_l;
|
|
cdd.audio[1] = prev_r;
|
|
}
|
|
else
|
|
{
|
|
/* no audio output */
|
|
if (prev_l | prev_r)
|
|
{
|
|
/* update blip buffer */
|
|
blip_add_delta_fast(snd.blips[2], 0, -prev_l, -prev_r);
|
|
|
|
/* save audio output for next frame */
|
|
cdd.audio[0] = 0;
|
|
cdd.audio[1] = 0;
|
|
}
|
|
}
|
|
|
|
/* end of blip buffer timeframe */
|
|
blip_end_frame(snd.blips[2], samples);
|
|
}
|
|
|
|
void cdd_update_audio(unsigned int samples)
|
|
{
|
|
/* get number of internal clocks (CD-DA samples) needed */
|
|
samples = blip_clocks_needed(snd.blips[2], samples);
|
|
|
|
if (cart.special & HW_MEGASD)
|
|
{
|
|
/* MegaSD add-on specific CD-DA processing */
|
|
megasd_update_cdda(samples);
|
|
}
|
|
else
|
|
{
|
|
/* read needed CD-DA samples */
|
|
cdd_read_audio(samples);
|
|
}
|
|
}
|
|
|
|
static void cdd_read_subcode(void)
|
|
{
|
|
uint8 subc[96];
|
|
int i,j,index;
|
|
|
|
/* update subcode buffer pointer address */
|
|
scd.regs[0x68>>1].byte.l = (scd.regs[0x68>>1].byte.l + 98) & 0x7e;
|
|
|
|
/* 16-bit register index */
|
|
index = (scd.regs[0x68>>1].byte.l + 0x100) >> 1;
|
|
|
|
/* read interleaved subcode data from .sub file (12 x 8-bit of P subchannel first, then Q subchannel, etc) */
|
|
cdStreamRead(subc, 1, 96, cdd.toc.sub);
|
|
|
|
/* convert back to raw subcode format (96 bytes with 8 x P-W subchannel bits per byte) */
|
|
for (i=0; i<96; i+=2)
|
|
{
|
|
int code = 0;
|
|
for (j=0; j<8; j++)
|
|
{
|
|
int bits = (subc[(j*12)+(i/8)] >> (6 - (i & 6))) & 3;
|
|
code |= ((bits & 1) << (7 - j));
|
|
code |= ((bits >> 1) << (15 - j));
|
|
}
|
|
|
|
/* subcode buffer is accessed as 16-bit words */
|
|
scd.regs[index].w = code;
|
|
|
|
/* subcode buffer is limited to 64 x 16-bit words */
|
|
index = (index + 1) & 0xbf;
|
|
}
|
|
|
|
/* level 6 interrupt enabled ? */
|
|
if (scd.regs[0x32>>1].byte.l & 0x40)
|
|
{
|
|
/* trigger level 6 interrupt */
|
|
scd.pending |= (1 << 6);
|
|
|
|
/* update IRQ level */
|
|
s68k_update_irq((scd.pending & scd.regs[0x32>>1].byte.l) >> 1);
|
|
}
|
|
}
|
|
|
|
void cdd_update(void)
|
|
{
|
|
#ifdef LOG_CDD
|
|
error("LBA = %d (track %d)(latency=%d)\n", cdd.lba, cdd.index, cdd.latency);
|
|
#endif
|
|
|
|
/* drive latency */
|
|
if (cdd.latency > 0)
|
|
{
|
|
cdd.latency--;
|
|
return;
|
|
}
|
|
|
|
/* reading disc */
|
|
if (cdd.status == CD_PLAY)
|
|
{
|
|
/* end of disc detection */
|
|
if (cdd.index >= cdd.toc.last)
|
|
{
|
|
cdd.status = CD_END;
|
|
return;
|
|
}
|
|
|
|
/* subcode data processing */
|
|
if (cdd.toc.sub)
|
|
{
|
|
cdd_read_subcode();
|
|
}
|
|
|
|
/* track type */
|
|
if (cdd.toc.tracks[cdd.index].type)
|
|
{
|
|
/* CD-ROM sector header */
|
|
uint8 header[4];
|
|
uint32 msf = cdd.lba + 150;
|
|
header[0] = lut_BCD_8[(msf / 75) / 60];
|
|
header[1] = lut_BCD_8[(msf / 75) % 60];
|
|
header[2] = lut_BCD_8[(msf % 75)];
|
|
header[3] = cdd.toc.tracks[cdd.index].type;
|
|
|
|
/* decode CD-ROM track sector */
|
|
cdc_decoder_update(*(uint32 *)(header));
|
|
}
|
|
else
|
|
{
|
|
/* check against audio track start index */
|
|
if (cdd.lba >= cdd.toc.tracks[cdd.index].start)
|
|
{
|
|
/* audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x00;
|
|
}
|
|
|
|
/* audio blocks are still sent to CDC as well as CD DAC/Fader */
|
|
cdc_decoder_update(0);
|
|
}
|
|
|
|
/* read next sector */
|
|
cdd.lba++;
|
|
|
|
/* check end of current track */
|
|
if (cdd.lba >= cdd.toc.tracks[cdd.index].end)
|
|
{
|
|
/* seek to next track start (assuming it can only be an audio track) */
|
|
cdd_seek_audio(cdd.index + 1, cdd.toc.tracks[cdd.index + 1].start);
|
|
|
|
/* increment current track index */
|
|
cdd.index++;
|
|
|
|
/* PAUSE between tracks */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* CDC decoder is still running while disc is not being read (fixes MCD-verificator CDC Flags Test #30) */
|
|
cdc_decoder_update(0);
|
|
}
|
|
|
|
/* scanning disc */
|
|
if (cdd.status == CD_SCAN)
|
|
{
|
|
/* current track index */
|
|
int index = cdd.index;
|
|
|
|
/* fast-forward or fast-rewind */
|
|
cdd.lba += cdd.scanOffset;
|
|
|
|
/* check current track limits */
|
|
if (cdd.lba >= cdd.toc.tracks[index].end)
|
|
{
|
|
/* next track */
|
|
index++;
|
|
|
|
/* check disc limits */
|
|
if (index < cdd.toc.last)
|
|
{
|
|
/* skip directly to next track start position */
|
|
cdd.lba = cdd.toc.tracks[index].start;
|
|
}
|
|
else
|
|
{
|
|
/* end of disc */
|
|
cdd.lba = cdd.toc.end;
|
|
cdd.index = cdd.toc.last;
|
|
cdd.status = CD_END;
|
|
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
return;
|
|
}
|
|
}
|
|
else if (cdd.lba < cdd.toc.tracks[index].start)
|
|
{
|
|
/* check disc limits */
|
|
if (index > 0)
|
|
{
|
|
/* previous track */
|
|
index--;
|
|
|
|
/* skip directly to previous track end position */
|
|
cdd.lba = cdd.toc.tracks[index].end;
|
|
}
|
|
else
|
|
{
|
|
/* start of first track */
|
|
cdd.lba = 0;
|
|
}
|
|
}
|
|
|
|
/* seek to current subcode position */
|
|
if (cdd.toc.sub)
|
|
{
|
|
cdStreamSeek(cdd.toc.sub, cdd.lba * 96, SEEK_SET);
|
|
}
|
|
|
|
/* current track is an audio track ? */
|
|
if (cdd.toc.tracks[index].type == TYPE_AUDIO)
|
|
{
|
|
/* seek to current track sector */
|
|
cdd_seek_audio(index, cdd.lba);
|
|
|
|
/* audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x00;
|
|
}
|
|
else
|
|
{
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
}
|
|
|
|
/* udpate current track index */
|
|
cdd.index = index;
|
|
}
|
|
|
|
/* seeking should start with at least one interrupt delay (fixes Radical Rex incorrect PRG-RAM & Word-RAM initialization, causing missing sprites during intro) */
|
|
if (scd.regs[0x38>>1].byte.h == CD_SEEK)
|
|
{
|
|
/* reset track index */
|
|
int index = 0;
|
|
|
|
/* new LBA position */
|
|
int lba = ((scd.regs[0x44>>1].byte.h * 10 + scd.regs[0x44>>1].byte.l) * 60 +
|
|
(scd.regs[0x46>>1].byte.h * 10 + scd.regs[0x46>>1].byte.l)) * 75 +
|
|
(scd.regs[0x48>>1].byte.h * 10 + scd.regs[0x48>>1].byte.l) - 150;
|
|
|
|
/* CD drive latency */
|
|
if (!cdd.latency)
|
|
{
|
|
/* Fixes a few games hanging because they expect data to be read with some delay */
|
|
/* Wolf Team games (Annet Futatabi, Aisle Lord, Cobra Command, Earnest Evans, Road Avenger & Time Gal) need at least 11 interrupts delay */
|
|
/* Space Adventure Cobra (2nd morgue scene) needs at least 13 interrupts delay (incl. seek time, so 11 is OK) */
|
|
/* By default, at least two interrupts latency is required by current emulation model (BIOS hangs otherwise) */
|
|
cdd.latency = 2 + 9*config.cd_latency;
|
|
}
|
|
|
|
/* CD drive seek time */
|
|
/* max. seek time = 1.5 s = 1.5 x 75 = 112.5 CDD interrupts (rounded to 120) for 270000 sectors max on disc. */
|
|
/* Note: This is only a rough approximation since, on real hardware, seek time is much likely not linear and */
|
|
/* latency much larger than above value, but this model works fine for Sonic CD (track 26 playback needs to */
|
|
/* be enough delayed to start in sync with intro sequence, as compared with real hardware recording). */
|
|
/* It also works fine for Switch/Panic! intro (at least 30 interrupts are needed while seeking from 00:05:63 */
|
|
/* to 24:03:19 in Switch or when seeking from 00:05:60 to 24:06:07 in Panic!). */
|
|
if (lba > cdd.lba)
|
|
{
|
|
cdd.latency += (((lba - cdd.lba) * 120 * config.cd_latency) / 270000);
|
|
}
|
|
else
|
|
{
|
|
cdd.latency += (((cdd.lba - lba) * 120 * config.cd_latency) / 270000);
|
|
}
|
|
|
|
/* update current LBA */
|
|
cdd.lba = lba;
|
|
|
|
/* get track index */
|
|
while ((cdd.toc.tracks[index].end <= lba) && (index < cdd.toc.last))
|
|
index++;
|
|
|
|
/* audio track ? */
|
|
if (cdd.toc.tracks[index].type == TYPE_AUDIO)
|
|
{
|
|
/* stay within track limits when seeking files */
|
|
if (lba < cdd.toc.tracks[index].start)
|
|
{
|
|
lba = cdd.toc.tracks[index].start;
|
|
}
|
|
|
|
/* seek to current track sector */
|
|
cdd_seek_audio(index, lba);
|
|
}
|
|
|
|
/* update current track index */
|
|
cdd.index = index;
|
|
|
|
/* seek to current subcode position */
|
|
if (cdd.toc.sub)
|
|
{
|
|
cdStreamSeek(cdd.toc.sub, lba * 96, SEEK_SET);
|
|
}
|
|
|
|
/* no audio track playing (yet) */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
|
|
/* update CDD status to either PLAY or PAUSE depending on host command (will be reported to host once seeking has ended) */
|
|
cdd.status = scd.regs[0x42>>1].byte.h & 0x05;
|
|
}
|
|
}
|
|
|
|
void cdd_process(void)
|
|
{
|
|
/* Process CDD command */
|
|
switch (scd.regs[0x42>>1].byte.h & 0x0f)
|
|
{
|
|
case 0x00: /* Get Drive Status */
|
|
{
|
|
/* RS0-RS1 are normally unchanged unless reported drive status needs to be updated (i.e previous drive command has been processed) */
|
|
/* Note: this function is called one 75hz frame ahead of CDD update so latency counter is always one step ahead of upcoming status */
|
|
/* Radical Rex and Annet Futatabi both need at least respectively 2 and 3 interrupts with 'playing' status returned before sectors start getting incremented */
|
|
if (cdd.latency <= 3)
|
|
{
|
|
/* update reported drive status */
|
|
scd.regs[0x38>>1].byte.h = cdd.status;
|
|
|
|
/* do not update RS1-RS8 if disc is stopped */
|
|
if ((cdd.status == CD_STOP) || (cdd.status > CD_PAUSE))
|
|
break;
|
|
|
|
/* check if RS1 indicated invalid track infos (during seeking) */
|
|
if (scd.regs[0x38>>1].byte.l == 0x0f)
|
|
{
|
|
/* seeking has ended so we return valid track infos, e.g current absolute time by default (fixes Lunar - The Silver Star) */
|
|
int lba = cdd.lba + 150;
|
|
scd.regs[0x38>>1].byte.l = 0x00;
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type ? 0x04 : 0x00; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
|
}
|
|
|
|
/* otherwise, check if RS2-RS8 need to be updated */
|
|
else if (scd.regs[0x38>>1].byte.l == 0x00)
|
|
{
|
|
/* current absolute time */
|
|
int lba = cdd.lba + 150;
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type ? 0x04 : 0x00; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
|
}
|
|
else if (scd.regs[0x38>>1].byte.l == 0x01)
|
|
{
|
|
/* current track relative time */
|
|
int lba = abs(cdd.lba - cdd.toc.tracks[cdd.index].start);
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type ? 0x04 : 0x00; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
|
}
|
|
else if (scd.regs[0x38>>1].byte.l == 0x02)
|
|
{
|
|
/* current track number */
|
|
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 0x01: /* Stop Drive */
|
|
{
|
|
/* update status */
|
|
cdd.status = cdd.loaded ? CD_TOC : NO_DISC;
|
|
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
|
|
/* RS1-RS8 ignored, expects 0x0 (CD_STOP) in RS0 once */
|
|
scd.regs[0x38>>1].w = (CD_STOP << 8) | 0x0f;
|
|
scd.regs[0x3a>>1].w = 0x0000;
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000;
|
|
scd.regs[0x40>>1].w = ~(CD_STOP + 0x0f) & 0x0f;
|
|
|
|
/* reset drive position */
|
|
cdd.index = cdd.lba = 0;
|
|
return;
|
|
}
|
|
|
|
case 0x02: /* Report TOC infos */
|
|
{
|
|
/* Infos automatically retrieved by CDD processor from Q-Channel */
|
|
/* commands 0x00-0x02 (current block) and 0x03-0x05 (Lead-In) */
|
|
switch (scd.regs[0x44>>1].byte.l)
|
|
{
|
|
case 0x00: /* Current Absolute Time (MM:SS:FF) */
|
|
{
|
|
int lba = cdd.lba + 150;
|
|
scd.regs[0x38>>1].w = cdd.status << 8;
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type ? 0x04 : 0x00; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
|
break;
|
|
}
|
|
|
|
case 0x01: /* Current Track Relative Time (MM:SS:FF) */
|
|
{
|
|
int lba = abs(cdd.lba - cdd.toc.tracks[cdd.index].start);
|
|
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x01;
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x40>>1].byte.h = cdd.toc.tracks[cdd.index].type ? 0x04 : 0x00; /* Current block flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
|
break;
|
|
}
|
|
|
|
case 0x02: /* Current Track Number */
|
|
{
|
|
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x02;
|
|
scd.regs[0x3a>>1].w = (cdd.index < cdd.toc.last) ? lut_BCD_16[cdd.index + 1] : 0x0A0A;
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000; /* Disk Control Code (?) in RS6 */
|
|
scd.regs[0x40>>1].byte.h = 0x00;
|
|
break;
|
|
}
|
|
|
|
case 0x03: /* Total length (MM:SS:FF) */
|
|
{
|
|
int lba = cdd.toc.end + 150;
|
|
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x03;
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x40>>1].byte.h = 0x00;
|
|
break;
|
|
}
|
|
|
|
case 0x04: /* First & Last Track Numbers */
|
|
{
|
|
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x04;
|
|
scd.regs[0x3a>>1].w = 0x0001;
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[cdd.toc.last];
|
|
scd.regs[0x3e>>1].w = 0x0000; /* Drive Version (?) in RS6-RS7 */
|
|
scd.regs[0x40>>1].byte.h = 0x00; /* Lead-In flags in RS8 (bit0 = mute status, bit1: pre-emphasis status, bit2: track type) */
|
|
break;
|
|
}
|
|
|
|
case 0x05: /* Track Start Time (MM:SS:FF) */
|
|
{
|
|
int track = scd.regs[0x46>>1].byte.h * 10 + scd.regs[0x46>>1].byte.l;
|
|
int lba = cdd.toc.tracks[track-1].start + 150;
|
|
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x05;
|
|
scd.regs[0x3a>>1].w = lut_BCD_16[(lba/75)/60];
|
|
scd.regs[0x3c>>1].w = lut_BCD_16[(lba/75)%60];
|
|
scd.regs[0x3e>>1].w = lut_BCD_16[(lba%75)];
|
|
scd.regs[0x3e>>1].byte.h |= cdd.toc.tracks[track-1].type ? 0x08 : 0x00; /* RS6 bit 3 is set for CD-ROM track */
|
|
scd.regs[0x40>>1].byte.h = track % 10; /* Track Number (low digit) */
|
|
break;
|
|
}
|
|
|
|
case 0x06: /* Latest Error Information */
|
|
{
|
|
scd.regs[0x38>>1].w = (cdd.status << 8) | 0x06;
|
|
scd.regs[0x3a>>1].w = 0x0000; /* no error */
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000;
|
|
scd.regs[0x40>>1].byte.h = 0x00;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
#ifdef LOG_ERROR
|
|
error("Invalid CDD request code %02X (%X)\n", scd.regs[0x44>>1].byte.l, s68k.pc);
|
|
#endif
|
|
return;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 0x03: /* Play */
|
|
{
|
|
/* RS0 should indicate seeking until drive is ready (fixes audio delay in Bari Arm) */
|
|
/* RS1=0xf to invalidate track infos in RS2-RS8 until drive is ready (fixes Snatcher Act 2 start cutscene) */
|
|
scd.regs[0x38>>1].w = (CD_SEEK << 8) | 0x0f;
|
|
scd.regs[0x3a>>1].w = 0x0000;
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000;
|
|
scd.regs[0x40>>1].w = ~(CD_SEEK + 0x0f) & 0x0f;
|
|
return;
|
|
}
|
|
|
|
case 0x04: /* Seek */
|
|
{
|
|
/* RS1=0xf to invalidate track infos in RS2-RS8 while seeking (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;
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000;
|
|
scd.regs[0x40>>1].w = ~(CD_SEEK + 0x0f) & 0x0f;
|
|
return;
|
|
}
|
|
|
|
case 0x06: /* Pause */
|
|
{
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
|
|
/* update status (RS1-RS8 unchanged) */
|
|
cdd.status = scd.regs[0x38>>1].byte.h = CD_PAUSE;
|
|
break;
|
|
}
|
|
|
|
case 0x07: /* Resume */
|
|
{
|
|
/* update status (RS1-RS8 unchanged) */
|
|
cdd.status = scd.regs[0x38>>1].byte.h = CD_PLAY;
|
|
break;
|
|
}
|
|
|
|
case 0x08: /* Forward Scan */
|
|
{
|
|
/* reset scanning direction / speed */
|
|
cdd.scanOffset = CD_SCAN_SPEED;
|
|
|
|
/* update status (RS1-RS8 unchanged) */
|
|
cdd.status = scd.regs[0x38>>1].byte.h = CD_SCAN;
|
|
break;
|
|
}
|
|
|
|
case 0x09: /* Rewind Scan */
|
|
{
|
|
/* reset scanning direction / speed */
|
|
cdd.scanOffset = -CD_SCAN_SPEED;
|
|
|
|
/* update status (RS1-RS8 unchanged) */
|
|
cdd.status = scd.regs[0x38>>1].byte.h = CD_SCAN;
|
|
break;
|
|
}
|
|
|
|
case 0x0a: /* N-Track Jump Control ? (usually sent before CD_SEEK or CD_PLAY commands) */
|
|
{
|
|
/* TC3 corresponds to seek direction (00=forward, FF=reverse) */
|
|
/* TC4-TC7 are related to seek length (4x4 bits i.e parameter values are between -65535 and +65535) */
|
|
/* Maybe related to number of auto-sequenced track jumps/moves for CD DSP (cf. CXD2500BQ datasheet) */
|
|
/* also see US Patent nr. 5222054 for a detailled description of seeking operation using Track Jump */
|
|
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
|
|
/* update status (RS1-RS8 unchanged) */
|
|
cdd.status = scd.regs[0x38>>1].byte.h = CD_PAUSE;
|
|
break;
|
|
}
|
|
|
|
case 0x0c: /* Close Tray */
|
|
{
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
|
|
/* update status */
|
|
cdd.status = cdd.loaded ? CD_TOC : NO_DISC;
|
|
|
|
/* RS1-RS8 ignored, expects CD_STOP in RS0 once */
|
|
scd.regs[0x38>>1].w = (CD_STOP << 8) | 0x0f;
|
|
scd.regs[0x3a>>1].w = 0x0000;
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000;
|
|
scd.regs[0x40>>1].w = ~(CD_STOP + 0x0f) & 0x0f;
|
|
|
|
/* reset drive position */
|
|
cdd.index = cdd.lba = 0;
|
|
|
|
#ifdef CD_TRAY_CALLBACK
|
|
CD_TRAY_CALLBACK
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
case 0x0d: /* Open Tray */
|
|
{
|
|
/* no audio track playing */
|
|
scd.regs[0x36>>1].byte.h = 0x01;
|
|
|
|
/* update status (RS1-RS8 ignored) */
|
|
cdd.status = CD_OPEN;
|
|
scd.regs[0x38>>1].w = (CD_OPEN << 8) | 0x0f;
|
|
scd.regs[0x3a>>1].w = 0x0000;
|
|
scd.regs[0x3c>>1].w = 0x0000;
|
|
scd.regs[0x3e>>1].w = 0x0000;
|
|
scd.regs[0x40>>1].w = ~(CD_OPEN + 0x0f) & 0x0f;
|
|
|
|
/* reset drive position */
|
|
cdd.index = cdd.lba = 0;
|
|
|
|
#ifdef CD_TRAY_CALLBACK
|
|
CD_TRAY_CALLBACK
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
default: /* Unknown command */
|
|
#ifdef LOG_ERROR
|
|
error("Unsupported CDD command %02X (%X)\n", scd.regs[0x42>>1].byte.h & 0x0f, s68k.pc);
|
|
#endif
|
|
scd.regs[0x38>>1].byte.h = cdd.status;
|
|
break;
|
|
}
|
|
|
|
/* only compute checksum when necessary */
|
|
scd.regs[0x40>>1].byte.l = ~(scd.regs[0x38>>1].byte.h + scd.regs[0x38>>1].byte.l +
|
|
scd.regs[0x3a>>1].byte.h + scd.regs[0x3a>>1].byte.l +
|
|
scd.regs[0x3c>>1].byte.h + scd.regs[0x3c>>1].byte.l +
|
|
scd.regs[0x3e>>1].byte.h + scd.regs[0x3e>>1].byte.l +
|
|
scd.regs[0x40>>1].byte.h) & 0x0f;
|
|
}
|