ref: 6c8bd4efbb4713c2c1e83ded672244219596f4d2
dir: /src/ft2_mix.c/
#include <stdint.h>
#include <stdbool.h>
#include "ft2_mix.h"
#include "ft2_mix_macros.h"
#include "ft2_intrp_table.h"
/*
** --------------------- 32-bit fixed-point audio channel mixer ---------------------
** (Note: Mixing macros can be found in ft2_mix_macros.h)
**
** 8bitbubsy: This is mostly ported from the i386-asm 32-bit mixer that was introduced in
** FT2.08 (MS-DOS). It has been changed and improved quite a bit, though...
**
** This file has separate routines for EVERY possible sampling variation:
** Interpolation on/off, volume ramping on/off, 8-bit, 16-bit, no loop, loop, pingpong.
** (24 mixing routines in total)
**
** Every voice has a function pointer set to the according mixing routine on sample
** trigger (from replayer, but set in audio thread), using a function pointer look-up
** table. All voices & pointers are always thread-safely cleared when changing any
** of the above attributes from the GUI, to prevent possible thread-related issues.
**
** There's one problem with the 4-tap cubic spline resampling interpolation...
** On looped samples where loopStart>0, the splines are not correct when reading
** from the loopStart (or +1?) sample point. The difference in audio is very minor,
** so it's not a big problem. It just has to stay like this the way the mixer works.
** In cases where loopStart=0, the sample before index 0 (yes, we allocate enough
** data and pre-increment main pointer to support negative look-up), is already
** pre-fixed so that the splines will be correct.
** ----------------------------------------------------------------------------------
*/
/* ----------------------------------------------------------------------- */
/* 8-BIT MIXING ROUTINES */
/* ----------------------------------------------------------------------- */
static void mix8bNoLoop(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO
INC_POS
RENDER_8BIT_SMP_MONO
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
INC_POS
RENDER_8BIT_SMP
INC_POS
}
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix8bLoop(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO
INC_POS
RENDER_8BIT_SMP_MONO
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
INC_POS
RENDER_8BIT_SMP
INC_POS
}
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bBidiLoop(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS
SET_BASE8_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO
INC_POS_BIDI
RENDER_8BIT_SMP_MONO
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
INC_POS_BIDI
RENDER_8BIT_SMP
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bNoLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO_INTRP
INC_POS
RENDER_8BIT_SMP_MONO_INTRP
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_INTRP
INC_POS
RENDER_8BIT_SMP_INTRP
INC_POS
}
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix8bLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO_INTRP
INC_POS
RENDER_8BIT_SMP_MONO_INTRP
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_INTRP
INC_POS
RENDER_8BIT_SMP_INTRP
INC_POS
}
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bBidiLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS
SET_BASE8_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO_INTRP
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO_INTRP
INC_POS_BIDI
RENDER_8BIT_SMP_MONO_INTRP
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_INTRP
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_INTRP
INC_POS_BIDI
RENDER_8BIT_SMP_INTRP
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bRampNoLoop(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix8bRampLoop(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bRampBidiLoop(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE8_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_MONO
VOLUME_RAMPING
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
}
END_BIDI
SET_VOL_BACK
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bRampNoLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix8bRampLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE8
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bRampBidiLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int8_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE8_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
}
END_BIDI
SET_VOL_BACK
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
/* ----------------------------------------------------------------------- */
/* 16-BIT MIXING ROUTINES */
/* ----------------------------------------------------------------------- */
static void mix16bNoLoop(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO
INC_POS
RENDER_16BIT_SMP_MONO
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
INC_POS
RENDER_16BIT_SMP
INC_POS
}
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix16bLoop(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO
INC_POS
RENDER_16BIT_SMP_MONO
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
INC_POS
RENDER_16BIT_SMP
INC_POS
}
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bBidiLoop(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS
SET_BASE16_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO
INC_POS_BIDI
RENDER_16BIT_SMP_MONO
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
INC_POS_BIDI
RENDER_16BIT_SMP
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bNoLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO_INTRP
INC_POS
RENDER_16BIT_SMP_MONO_INTRP
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_INTRP
INC_POS
RENDER_16BIT_SMP_INTRP
INC_POS
}
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix16bLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol| CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO_INTRP
INC_POS
RENDER_16BIT_SMP_MONO_INTRP
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_INTRP
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_INTRP
INC_POS
RENDER_16BIT_SMP_INTRP
INC_POS
}
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bBidiLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
GET_VOL
if ((CDA_LVol | CDA_RVol) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS
SET_BASE16_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
CDA_BytesLeft -= samplesToMix;
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO_INTRP
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO_INTRP
INC_POS_BIDI
RENDER_16BIT_SMP_MONO_INTRP
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_INTRP
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_INTRP
INC_POS_BIDI
RENDER_16BIT_SMP_INTRP
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bRampNoLoop(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix16bRampLoop(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bRampBidiLoop(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE16_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_MONO
VOLUME_RAMPING
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
}
END_BIDI
SET_VOL_BACK
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bRampNoLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_NO_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix16bRampLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE16
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS
}
}
SET_VOL_BACK
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bRampBidiLoopIntrp(voice_t *v, uint32_t numSamples)
{
const int16_t *CDA_LinearAdr, *CDA_LinAdrRev, *smpPtr;
int32_t realPos, sample, sample2, sample3, sample4, *audioMixL, *audioMixR;
int32_t CDA_LVolIP, CDA_RVolIP, CDA_LVol, CDA_RVol;
uint32_t pos, delta, i, samplesToMix, CDA_BytesLeft;
if ((v->SLVol1 | v->SRVol1 | v->SLVol2 | v->SRVol2) == 0)
{
VOL0_OPTIMIZATION_BIDI_LOOP
return;
}
GET_MIXER_VARS_RAMP
SET_BASE16_BIDI
CDA_BytesLeft = numSamples;
while (CDA_BytesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
CDA_BytesLeft -= samplesToMix;
GET_VOL
START_BIDI
if (mixInMono)
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_MONO_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
}
else
{
if (samplesToMix & 1)
{
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 1;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_INTRP
VOLUME_RAMPING
INC_POS_BIDI
}
}
END_BIDI
SET_VOL_BACK
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
// -----------------------------------------------------------------------
const mixRoutine mixRoutineTable[24] =
{
(mixRoutine)mix8bNoLoop,
(mixRoutine)mix8bLoop,
(mixRoutine)mix8bBidiLoop,
(mixRoutine)mix8bNoLoopIntrp,
(mixRoutine)mix8bLoopIntrp,
(mixRoutine)mix8bBidiLoopIntrp,
(mixRoutine)mix8bRampNoLoop,
(mixRoutine)mix8bRampLoop,
(mixRoutine)mix8bRampBidiLoop,
(mixRoutine)mix8bRampNoLoopIntrp,
(mixRoutine)mix8bRampLoopIntrp,
(mixRoutine)mix8bRampBidiLoopIntrp,
(mixRoutine)mix16bNoLoop,
(mixRoutine)mix16bLoop,
(mixRoutine)mix16bBidiLoop,
(mixRoutine)mix16bNoLoopIntrp,
(mixRoutine)mix16bLoopIntrp,
(mixRoutine)mix16bBidiLoopIntrp,
(mixRoutine)mix16bRampNoLoop,
(mixRoutine)mix16bRampLoop,
(mixRoutine)mix16bRampBidiLoop,
(mixRoutine)mix16bRampNoLoopIntrp,
(mixRoutine)mix16bRampLoopIntrp,
(mixRoutine)mix16bRampBidiLoopIntrp
};