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82d67b6413
WiiFlow_Lite/portlibs/sources/libmodplay/source/mixer.c
fix94.1 82d67b6413 mirrored wiiflow r417
2012-01-21 20:57:41 +00:00

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/*
* Copyright (c) 2002, 2003, 2004, 2005, 2007 by Christian Nowak <chnowak@web.de>
* Last update: 20th October, 2007
*/
#include "mixer.h"
#define DO_LOOPING \
if (forward) \
{ \
playpos += incval; \
if (playpos >= loop_end) \
{ \
if (looped) \
{ \
if (pingpong) \
{ \
forward = !forward; \
playpos -= incval; \
} else \
playpos -= loop_end - loop_start; \
} else \
{ \
playpos = loop_end; \
vinfo->playing = FALSE; \
break; \
} \
} \
} else \
{ \
playpos -= incval; \
if (/*playpos <= loop_start*/playpos - loop_start <= incval) \
{ \
if (looped) \
{ \
if (pingpong) \
{ \
forward = !forward; \
playpos += incval; \
} else \
playpos += loop_end - loop_start; \
} else \
{ \
playpos = loop_start; \
vinfo->playing = FALSE; \
break; \
} \
} \
}
#define DO_LOOPING_OLD \
playpos += incval; \
if (playpos >= loop_end) \
{ \
if (looped) \
{ \
playpos -= loop_end-loop_start; \
} else \
{ \
playpos = loop_end; \
vinfo->playing = FALSE; \
break; \
} \
}
#define DO_LOOPING_PINGPONG \
playpos += incval; \
if (forward && playpos >= loop_end) \
{ \
if (looped) \
{ \
incval = -incval; \
forward = FALSE; \
} else \
{ \
playpos = loop_end; \
vinfo->playing = FALSE; \
break; \
} \
} else \
if (!forward && playpos <= loop_start) \
{ \
if (looped) \
{ \
incval = -incval; \
forward = TRUE; \
} else \
{ \
playpos = loop_start; \
vinfo->playing = FALSE; \
break; \
} \
}
int mix_destbufsize(int flags) {
int size = 1;
if (flags & MIXER_DEST_STEREO)
size *= 2;
if (flags & MIXER_DEST_16BIT)
size *= 2;
return size;
}
int clearbuf_final(int flags, void *dest, int nSamples) {
if (flags & MIXER_USE_S32) {
if (flags & MIXER_DEST_STEREO) {
clearbuf_s32((s32*)dest, 2, nSamples);
} else {
clearbuf_s32((s32*)dest, 1, nSamples);
}
}
return nSamples;
}
int mix_final_1616bit(int flags, void *dest, int nSamples, MOD_VOICEINFO16 *vinfo, u8 mainvol) {
if (flags & MIXER_USE_S32) {
if (flags & MIXER_DEST_STEREO) {
if (vinfo->sampleInfo->bit_16) {
mix_s16m_to_s32s_1616bit((s32*)dest, nSamples, vinfo, mainvol);
} else {
mix_s8m_to_s32s_1616bit((s32*)dest, nSamples, vinfo, mainvol);
}
} else {
if (vinfo->sampleInfo->bit_16) {
mix_s16m_to_s32m_1616bit((s32*)dest, nSamples, vinfo, mainvol);
} else {
mix_s8m_to_s32m_1616bit((s32*)dest, nSamples, vinfo, mainvol);
}
}
}
return nSamples;
}
int copybuf_final(int flags, void *dest, void *src, int nSamples) {
if (flags & MIXER_USE_S32) {
if (flags & MIXER_DEST_SIGNED) {
if (flags & MIXER_DEST_16BIT) {
if (flags & MIXER_DEST_STEREO) {
copybuf_s32_to_s16((s16*)dest, (s32*)src, 2, nSamples);
} else {
copybuf_s32_to_s16((s16*)dest, (s32*)src, 1, nSamples);
}
} else {
if (flags & MIXER_DEST_STEREO) {
copybuf_s32_to_s8((s8*)dest, (s32*)src, 2, nSamples);
} else {
copybuf_s32_to_s8((s8*)dest, (s32*)src, 1, nSamples);
}
}
} else {
if (flags & MIXER_DEST_16BIT) {
if (flags & MIXER_DEST_STEREO) {
copybuf_s32_to_u16((u16*)dest, (s32*)src, 2, nSamples);
} else {
copybuf_s32_to_u16((u16*)dest, (s32*)src, 1, nSamples);
}
} else {
if (flags & MIXER_DEST_STEREO) {
copybuf_s32_to_u8((u8*)dest, (s32*)src, 2, nSamples);
} else {
copybuf_s32_to_u8((u8*)dest, (s32*)src, 1, nSamples);
}
}
}
}
return nSamples;
}
/* Mix s8 mono -> s32 mono, 16.16bit fixed point */
int mix_s8m_to_s32m_1616bit(s32 *dest, int nSamples, MOD_VOICEINFO16 *vinfo, u8 mainvol) {
int k;
s32 volume;
MIXER_TYPE playpos = vinfo->playpos;
MIXER_TYPE incval = vinfo->incval;
MIXER_TYPE loop_end = ((MIXER_TYPE)vinfo->sampleInfo->loop_end) << MIXER_SHIFT;
MIXER_TYPE loop_start = ((MIXER_TYPE)vinfo->sampleInfo->loop_start) << MIXER_SHIFT;
BOOL looped = vinfo->sampleInfo->looped;
BOOL forward = vinfo->forward;
BOOL pingpong = vinfo->sampleInfo->pingpong;
s8 *sampledata = vinfo->sampleInfo->sampledata;
if (!vinfo->playing)
return nSamples;
volume = ((s32)vinfo->volume * (s32)mainvol * (s32)vinfo->envVolume) >> 12;
for (k = 0; k < nSamples; k++) {
s32 value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
dest[k] += value * volume;
DO_LOOPING;
}
vinfo->playpos = playpos;
vinfo->forward = forward;
return nSamples;
}
/* Mix s16 mono -> s32 mono, 16.16bit fixed point */
int mix_s16m_to_s32m_1616bit(s32 *dest, int nSamples, MOD_VOICEINFO16 *vinfo, u8 mainvol) {
int k;
s32 volume;
MIXER_TYPE playpos = vinfo->playpos;
MIXER_TYPE incval = vinfo->incval;
MIXER_TYPE loop_end = ((MIXER_TYPE)vinfo->sampleInfo->loop_end) << MIXER_SHIFT;
MIXER_TYPE loop_start = ((MIXER_TYPE)vinfo->sampleInfo->loop_start) << MIXER_SHIFT;
BOOL looped = vinfo->sampleInfo->looped;
BOOL forward = vinfo->forward;
BOOL pingpong = vinfo->sampleInfo->pingpong;
s16 *sampledata = vinfo->sampleInfo->sampledata;
if (!vinfo->playing)
return nSamples;
volume = ((s32)vinfo->volume * (s32)mainvol * (s32)vinfo->envVolume) >> 12;
for (k = 0; k <nSamples; k++) {
s32 value = (s32)((s16*)sampledata)[playpos >> MIXER_SHIFT];
dest[k] += value * volume;
DO_LOOPING;
}
vinfo->playpos = playpos;
vinfo->forward = forward;
return nSamples;
}
/* Mix s8 mono -> s32 stereo, 16.16bit fixed point */
int mix_s8m_to_s32s_1616bit(s32 *dest, int nSamples, MOD_VOICEINFO16 *vinfo, u8 mainvol) {
int k;
s32 volume;
u8 lvolume, rvolume;
MIXER_TYPE playpos = vinfo->playpos;
MIXER_TYPE incval = vinfo->incval;
MIXER_TYPE loop_end = ((MIXER_TYPE)vinfo->sampleInfo->loop_end) << MIXER_SHIFT;
MIXER_TYPE loop_start = ((MIXER_TYPE)vinfo->sampleInfo->loop_start) << MIXER_SHIFT;
BOOL looped = vinfo->sampleInfo->looped;
BOOL forward = vinfo->forward;
BOOL pingpong = vinfo->sampleInfo->pingpong;
s8 * sampledata = vinfo->sampleInfo->sampledata;
s32 panning;
int mxamount = nSamples >> 3;
int mxrest = nSamples & ((1 << 3) - 1);
if (!vinfo->playing)
return nSamples;
volume = ((s32)vinfo->volume * (s32)mainvol * (s32)vinfo->envVolume) >> 12;
panning = ((s32)(vinfo->panning >> 2) - 32) + ((s32)vinfo->envPanning - 32);
if (panning > 32)
panning = 32;
if (panning < -32)
panning = -32;
panning += 32;
lvolume = (((u32)64 - panning) * volume) >> 6;
rvolume = (((u32)panning) * volume) >> 6;
for (k = 0; k < mxamount; k++) {
s32 value;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
}
for (k = 0; k < mxrest; k++) {
s32 value;
value = ((s32)(s16)((s8*)sampledata)[playpos >> MIXER_SHIFT]) << 8;
(*(dest++)) += value * lvolume;
(*(dest++)) += value * rvolume;
DO_LOOPING;
}
vinfo->playpos = playpos;
vinfo->forward = forward;
return nSamples;
}
/* Mix s16 mono -> s32 stereo, 16.16bit fixed point */
int mix_s16m_to_s32s_1616bit(s32 *dest, int nSamples, MOD_VOICEINFO16 *vinfo, u8 mainvol) {
int k;
s32 volume;
u8 lvolume, rvolume;
MIXER_TYPE playpos = vinfo->playpos;
MIXER_TYPE incval = vinfo->incval;
MIXER_TYPE loop_end = ((MIXER_TYPE)vinfo->sampleInfo->loop_end) << MIXER_SHIFT;
MIXER_TYPE loop_start = ((MIXER_TYPE)vinfo->sampleInfo->loop_start) << MIXER_SHIFT;
BOOL looped = vinfo->sampleInfo->looped;
BOOL forward = vinfo->forward;
BOOL pingpong = vinfo->sampleInfo->pingpong;
s16 * sampledata = vinfo->sampleInfo->sampledata;
if (!vinfo->playing)
return nSamples;
volume = ((s32)vinfo->volume * (s32)mainvol * (s32)vinfo->envVolume) >> 12;
lvolume = (((u32)64-(vinfo->panning >> 2))*volume) >> 6;
rvolume = (((u32)(vinfo->panning >> 2))*volume) >> 6;
for (k = 0; k < nSamples * 2; k += 2) {
s32 value = (s32)((s16*)sampledata)[playpos >> MIXER_SHIFT];
dest[k] += value * lvolume;
dest[k + 1] += value * rvolume;
DO_LOOPING;
}
vinfo->playpos = playpos;
vinfo->forward = forward;
return nSamples;
}
void clearbuf_s32(s32 *dest, int channels, int nSamples) {
int k;
int mxamount;
int mxrest;
mxamount = (nSamples * channels) >> 3;
mxrest = (nSamples * channels) & ((1 << 3) - 1);
for (k = 0; k < mxamount; k++) {
(*(dest++)) = 0;
(*(dest++)) = 0;
(*(dest++)) = 0;
(*(dest++)) = 0;
(*(dest++)) = 0;
(*(dest++)) = 0;
(*(dest++)) = 0;
(*(dest++)) = 0;
}
for (k = 0; k < mxrest; k++) {
(*(dest++)) = 0;
}
/* for (k = 0; k < nSamples * channels; k++)
dest[k] = 0;*/
}
void copybuf_s32_to_s16(s16 *dest, s32 *src, int channels, int nSamples) {
int k;
for (k = 0; k < nSamples*channels; k++) {
s32 value = src[k] >> 8;
if (value < -32768)
value = -32768;
else if (value > 32767)
value = 32767;
dest[k] = (s16)value;
}
}
#define CLIP_S32(a) \
if (a < -32768) a = 32768; else if (a > 32767) a = 32767;
void copybuf_s32_to_u16(u16 *dest, s32 *src, int channels, int nSamples) {
int k;
int mxamount;
int mxrest;
mxamount = (nSamples * channels) >> 3;
mxrest = (nSamples * channels) & ((1 << 3) - 1);
for (k = 0; k < mxamount; k++) {
s32 value;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
}
for (k = 0; k < mxrest; k++) {
s32 value;
value = (*(src++)) >> 7;
CLIP_S32(value);
(*(dest++)) = ((u16)(s16)value) ^ 0x8000;
}
/* for (k=0; k<nSamples*channels; k++)
{
s32 value = src[k]>>7;
if (value<-32768)
value = -32768;
else
if (value>32767)
value = 32767;
dest[k] = ((u16)(s16)value)^0x8000;
}*/
}
void copybuf_s32_to_s8(s8 *dest, s32 *src, int channels, int nSamples) {
int k;
for (k = 0; k < nSamples * channels; k++) {
s32 value = src[k] >> 16;
if (value < -128)
value = -128;
else if (value > 127)
value = 127;
dest[k] = (s8)value;
}
}
void copybuf_s32_to_u8(u8 *dest, s32 *src, int channels, int nSamples) {
int k;
for (k = 0; k < nSamples * channels; k++) {
s32 value = src[k] >> 16;
if (value < -128)
value = -128;
else if (value > 127)
value = 127;
dest[k] = ((u8)(s8)value) ^ 0x80;
}
}
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