ref: 9401e0cd75b52f21e0f7918e8cc3f1cf96ff15ff
dir: /src/mixer/ft2_mix.c/
#include <stdint.h>
#include <stdbool.h>
#include "ft2_mix.h"
#include "ft2_mix_macros.h"
#include "ft2_center_mix.h"
/*
** -------------------- doubleing point audio channel mixer ---------------------
** (Note: Mixing macros can be found in ft2_mix_macros.h)
**
** Specifications:
** - Either no interpolation, 2-tap linear interpolation (FT2) or 8-tap windowed-sinc interpolation
** - Linear volume ramping, matching FT2 (can be turned off)
** - 32.32 fixed-point logic for resampling delta
** - 64-bit doube-precision logic for mixing and interpolation
**
** This file has separate routines for EVERY possible sampling variation:
** Interpolation none/sinc/linear, volumeramp on/off, 8-bit, 16-bit, no loop, loop, bidi.
** (36 mixing routines in total + another 36 for center-mixing)
**
** 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.
**
** -----------------------------------------------------------------------------
*/
/* ----------------------------------------------------------------------- */
/* 8-BIT MIXING ROUTINES */
/* ----------------------------------------------------------------------- */
static void mix8bNoLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
INC_POS
RENDER_8BIT_SMP
INC_POS
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 bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
INC_POS
RENDER_8BIT_SMP
INC_POS
RENDER_8BIT_SMP
INC_POS
RENDER_8BIT_SMP
INC_POS
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bBidiLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL
GET_MIXER_VARS
SET_BASE8_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
INC_POS_BIDI
RENDER_8BIT_SMP
INC_POS_BIDI
RENDER_8BIT_SMP
INC_POS_BIDI
RENDER_8BIT_SMP
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bNoLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP
INC_POS
RENDER_8BIT_SMP_SINTRP
INC_POS
RENDER_8BIT_SMP_SINTRP
INC_POS
RENDER_8BIT_SMP_SINTRP
INC_POS
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix8bLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
int8_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE8
PREPARE_TAP_FIX8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP
INC_POS
RENDER_8BIT_SMP_SINTRP
INC_POS
RENDER_8BIT_SMP_SINTRP
INC_POS
RENDER_8BIT_SMP_SINTRP
INC_POS
}
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bBidiLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *revBase, *smpPtr;
int8_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL
GET_MIXER_VARS
SET_BASE8_BIDI
PREPARE_TAP_FIX8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
START_BIDI
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bNoLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_LINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_LINTRP
INC_POS
RENDER_8BIT_SMP_LINTRP
INC_POS
RENDER_8BIT_SMP_LINTRP
INC_POS
RENDER_8BIT_SMP_LINTRP
INC_POS
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix8bLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_LINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_LINTRP
INC_POS
RENDER_8BIT_SMP_LINTRP
INC_POS
RENDER_8BIT_SMP_LINTRP
INC_POS
RENDER_8BIT_SMP_LINTRP
INC_POS
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bBidiLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL
GET_MIXER_VARS
SET_BASE8_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_LINTRP
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_LINTRP
INC_POS_BIDI
RENDER_8BIT_SMP_LINTRP
INC_POS_BIDI
RENDER_8BIT_SMP_LINTRP
INC_POS_BIDI
RENDER_8BIT_SMP_LINTRP
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix8bRampNoLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
HANDLE_SAMPLE_END
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS
}
WRAP_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampBidiLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampNoLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
HANDLE_SAMPLE_END
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
int8_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8
PREPARE_TAP_FIX8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
}
WRAP_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampBidiLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *revBase, *smpPtr;
int8_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8_BIDI
PREPARE_TAP_FIX8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
START_BIDI
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampNoLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
HANDLE_SAMPLE_END
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
WRAP_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix8bRampBidiLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int8_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE8_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_8BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
/* ----------------------------------------------------------------------- */
/* 16-BIT MIXING ROUTINES */
/* ----------------------------------------------------------------------- */
static void mix16bNoLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
INC_POS
RENDER_16BIT_SMP
INC_POS
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 bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
INC_POS
RENDER_16BIT_SMP
INC_POS
RENDER_16BIT_SMP
INC_POS
RENDER_16BIT_SMP
INC_POS
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bBidiLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL
GET_MIXER_VARS
SET_BASE16_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
INC_POS_BIDI
RENDER_16BIT_SMP
INC_POS_BIDI
RENDER_16BIT_SMP
INC_POS_BIDI
RENDER_16BIT_SMP
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bNoLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP
INC_POS
RENDER_16BIT_SMP_SINTRP
INC_POS
RENDER_16BIT_SMP_SINTRP
INC_POS
RENDER_16BIT_SMP_SINTRP
INC_POS
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix16bLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
int16_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE16
PREPARE_TAP_FIX16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP
INC_POS
RENDER_16BIT_SMP_SINTRP
INC_POS
RENDER_16BIT_SMP_SINTRP
INC_POS
RENDER_16BIT_SMP_SINTRP
INC_POS
}
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bBidiLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *revBase, *smpPtr;
int16_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL
GET_MIXER_VARS
SET_BASE16_BIDI
PREPARE_TAP_FIX16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
START_BIDI
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP_TAP_FIX
INC_POS_BIDI
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bNoLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_LINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_LINTRP
INC_POS
RENDER_16BIT_SMP_LINTRP
INC_POS
RENDER_16BIT_SMP_LINTRP
INC_POS
RENDER_16BIT_SMP_LINTRP
INC_POS
}
HANDLE_SAMPLE_END
}
SET_BACK_MIXER_POS
}
static void mix16bLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL
GET_MIXER_VARS
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_LINTRP
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_LINTRP
INC_POS
RENDER_16BIT_SMP_LINTRP
INC_POS
RENDER_16BIT_SMP_LINTRP
INC_POS
RENDER_16BIT_SMP_LINTRP
INC_POS
}
WRAP_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bBidiLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL
GET_MIXER_VARS
SET_BASE16_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_LINTRP
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_LINTRP
INC_POS_BIDI
RENDER_16BIT_SMP_LINTRP
INC_POS_BIDI
RENDER_16BIT_SMP_LINTRP
INC_POS_BIDI
RENDER_16BIT_SMP_LINTRP
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_BACK_MIXER_POS
}
static void mix16bRampNoLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
HANDLE_SAMPLE_END
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS
}
WRAP_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampBidiLoop(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP
VOLUME_RAMPING
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampNoLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
HANDLE_SAMPLE_END
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
int16_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16
PREPARE_TAP_FIX16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS
}
}
WRAP_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampBidiLoopSIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *revBase, *smpPtr;
int16_t *smpTapPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16_BIDI
PREPARE_TAP_FIX16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
START_BIDI
if (v->hasLooped) // the negative interpolation taps need a special case after the sample has looped once
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP_TAP_FIX
VOLUME_RAMPING
INC_POS_BIDI
}
}
else
{
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_SINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampNoLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
HANDLE_SAMPLE_END
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS
}
WRAP_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
static void mix16bRampBidiLoopLIntrp(voice_t *v, uint32_t bufferPos, uint32_t numSamples)
{
const int16_t *base, *revBase, *smpPtr;
double dSample, *dMixBufferL, *dMixBufferR;
int32_t pos;
double dVolLDelta, dVolRDelta, dVolL, dVolR;
uint32_t i, samplesToMix, samplesLeft;
uint64_t posFrac, tmpDelta;
GET_VOL_RAMP
GET_MIXER_VARS_RAMP
SET_BASE16_BIDI
samplesLeft = numSamples;
while (samplesLeft > 0)
{
LIMIT_MIX_NUM
LIMIT_MIX_NUM_RAMP
samplesLeft -= samplesToMix;
START_BIDI
for (i = 0; i < (samplesToMix & 3); i++)
{
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
samplesToMix >>= 2;
for (i = 0; i < samplesToMix; i++)
{
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
RENDER_16BIT_SMP_LINTRP
VOLUME_RAMPING
INC_POS_BIDI
}
END_BIDI
WRAP_BIDI_LOOP
}
SET_VOL_BACK
SET_BACK_MIXER_POS
}
// -----------------------------------------------------------------------
const mixFunc mixFuncTab[72] =
{
/*
** ---------------------------------
** stereo mixing (this file)
** ---------------------------------
*/
// no volume ramping
// 8-bit
(mixFunc)mix8bNoLoop,
(mixFunc)mix8bLoop,
(mixFunc)mix8bBidiLoop,
(mixFunc)mix8bNoLoopSIntrp,
(mixFunc)mix8bLoopSIntrp,
(mixFunc)mix8bBidiLoopSIntrp,
(mixFunc)mix8bNoLoopLIntrp,
(mixFunc)mix8bLoopLIntrp,
(mixFunc)mix8bBidiLoopLIntrp,
// 16-bit
(mixFunc)mix16bNoLoop,
(mixFunc)mix16bLoop,
(mixFunc)mix16bBidiLoop,
(mixFunc)mix16bNoLoopSIntrp,
(mixFunc)mix16bLoopSIntrp,
(mixFunc)mix16bBidiLoopSIntrp,
(mixFunc)mix16bNoLoopLIntrp,
(mixFunc)mix16bLoopLIntrp,
(mixFunc)mix16bBidiLoopLIntrp,
// volume ramping
// 8-bit
(mixFunc)mix8bRampNoLoop,
(mixFunc)mix8bRampLoop,
(mixFunc)mix8bRampBidiLoop,
(mixFunc)mix8bRampNoLoopSIntrp,
(mixFunc)mix8bRampLoopSIntrp,
(mixFunc)mix8bRampBidiLoopSIntrp,
(mixFunc)mix8bRampNoLoopLIntrp,
(mixFunc)mix8bRampLoopLIntrp,
(mixFunc)mix8bRampBidiLoopLIntrp,
// 16-bit
(mixFunc)mix16bRampNoLoop,
(mixFunc)mix16bRampLoop,
(mixFunc)mix16bRampBidiLoop,
(mixFunc)mix16bRampNoLoopSIntrp,
(mixFunc)mix16bRampLoopSIntrp,
(mixFunc)mix16bRampBidiLoopSIntrp,
(mixFunc)mix16bRampNoLoopLIntrp,
(mixFunc)mix16bRampLoopLIntrp,
(mixFunc)mix16bRampBidiLoopLIntrp,
/*
** ---------------------------------
** center mixing (ft2_center_mix.c)
** ---------------------------------
*/
// no volume ramping
// 8-bit
(mixFunc)centerMix8bNoLoop,
(mixFunc)centerMix8bLoop,
(mixFunc)centerMix8bBidiLoop,
(mixFunc)centerMix8bNoLoopSIntrp,
(mixFunc)centerMix8bLoopSIntrp,
(mixFunc)centerMix8bBidiLoopSIntrp,
(mixFunc)centerMix8bNoLoopLIntrp,
(mixFunc)centerMix8bLoopLIntrp,
(mixFunc)centerMix8bBidiLoopLIntrp,
// 16-bit
(mixFunc)centerMix16bNoLoop,
(mixFunc)centerMix16bLoop,
(mixFunc)centerMix16bBidiLoop,
(mixFunc)centerMix16bNoLoopSIntrp,
(mixFunc)centerMix16bLoopSIntrp,
(mixFunc)centerMix16bBidiLoopSIntrp,
(mixFunc)centerMix16bNoLoopLIntrp,
(mixFunc)centerMix16bLoopLIntrp,
(mixFunc)centerMix16bBidiLoopLIntrp,
// volume ramping
// 8-bit
(mixFunc)centerMix8bRampNoLoop,
(mixFunc)centerMix8bRampLoop,
(mixFunc)centerMix8bRampBidiLoop,
(mixFunc)centerMix8bRampNoLoopSIntrp,
(mixFunc)centerMix8bRampLoopSIntrp,
(mixFunc)centerMix8bRampBidiLoopSIntrp,
(mixFunc)centerMix8bRampNoLoopLIntrp,
(mixFunc)centerMix8bRampLoopLIntrp,
(mixFunc)centerMix8bRampBidiLoopLIntrp,
// 16-bit
(mixFunc)centerMix16bRampNoLoop,
(mixFunc)centerMix16bRampLoop,
(mixFunc)centerMix16bRampBidiLoop,
(mixFunc)centerMix16bRampNoLoopSIntrp,
(mixFunc)centerMix16bRampLoopSIntrp,
(mixFunc)centerMix16bRampBidiLoopSIntrp,
(mixFunc)centerMix16bRampNoLoopLIntrp,
(mixFunc)centerMix16bRampLoopLIntrp,
(mixFunc)centerMix16bRampBidiLoopLIntrp
};