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Change audiolib mixing functions to just use a return value instead of setting a global to indicate the new mixing buffer position

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git-svn-id: https://svn.eduke32.com/eduke32@7285 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2018-12-15 01:40:03 +00:00
parent c3f88abf73
commit 465e19909f
4 changed files with 52 additions and 40 deletions
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35
source/audiolib/src/mix.cpp
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@ -28,7 +28,7 @@
*/
// 8-bit mono source, 16-bit mono output
void MV_Mix16BitMono(struct VoiceNode const * const voice, uint32_t length)
uint32_t MV_Mix16BitMono(struct VoiceNode const * const voice, uint32_t length)
{
auto const source = (uint8_t const *)voice->sound;
auto dest = (int16_t *)MV_MixDestination;
@ -37,7 +37,7 @@ void MV_Mix16BitMono(struct VoiceNode const * const voice, uint32_t length)
uint32_t const rate = voice->RateScale;
float const volume = voice->volume;
while (length--)
do
{
uint8_t const usample0 = SCALE_SAMPLE(source[position >> 16], volume);
@ -46,13 +46,15 @@ void MV_Mix16BitMono(struct VoiceNode const * const voice, uint32_t length)
*dest = (int16_t)clamp(SCALE_SAMPLE(MV_LeftVolume[usample0], MV_GlobalVolume) + *dest, INT16_MIN, INT16_MAX);
dest += MV_SampleSize >> 1;
}
while (--length);
MV_MixPosition = position;
MV_MixDestination = (char *)dest;
return position;
}
// 8-bit mono source, 16-bit stereo output
void MV_Mix16BitStereo(struct VoiceNode const * const voice, uint32_t length)
uint32_t MV_Mix16BitStereo(struct VoiceNode const * const voice, uint32_t length)
{
auto const source = (uint8_t const *)voice->sound;
auto dest = (int16_t *)MV_MixDestination;
@ -61,7 +63,7 @@ void MV_Mix16BitStereo(struct VoiceNode const * const voice, uint32_t length)
uint32_t const rate = voice->RateScale;
float const volume = voice->volume;
while (length--)
do
{
uint8_t const usample0 = SCALE_SAMPLE(source[position >> 16], volume);
@ -72,13 +74,15 @@ void MV_Mix16BitStereo(struct VoiceNode const * const voice, uint32_t length)
= (int16_t)clamp(SCALE_SAMPLE(MV_RightVolume[usample0], MV_GlobalVolume) + *(dest + (MV_RightChannelOffset >> 1)), INT16_MIN, INT16_MAX);
dest += MV_SampleSize >> 1;
}
while (--length);
MV_MixPosition = position;
MV_MixDestination = (char *)dest;
return position;
}
// 16-bit mono source, 16-bit mono output
void MV_Mix16BitMono16(struct VoiceNode const * const voice, uint32_t length)
uint32_t MV_Mix16BitMono16(struct VoiceNode const * const voice, uint32_t length)
{
auto const source = (int16_t const *)voice->sound;
auto dest = (int16_t *)MV_MixDestination;
@ -87,7 +91,7 @@ void MV_Mix16BitMono16(struct VoiceNode const * const voice, uint32_t length)
uint32_t const rate = voice->RateScale;
float const volume = voice->volume;
while (length--)
do
{
int16_t const isample0 = B_LITTLE16(source[position >> 16]);
split16_t const usample0{FLIP_SIGN(SCALE_SAMPLE(isample0, volume))};
@ -100,13 +104,15 @@ void MV_Mix16BitMono16(struct VoiceNode const * const voice, uint32_t length)
*dest = (int16_t)clamp(sample0 + *dest, INT16_MIN, INT16_MAX);
dest += MV_SampleSize >> 1;
}
while (--length);
MV_MixPosition = position;
MV_MixDestination = (char *)dest;
return position;
}
// 16-bit mono source, 16-bit stereo output
void MV_Mix16BitStereo16(struct VoiceNode const * const voice, uint32_t length)
uint32_t MV_Mix16BitStereo16(struct VoiceNode const * const voice, uint32_t length)
{
auto const source = (int16_t const *)voice->sound;
auto dest = (int16_t *)MV_MixDestination;
@ -115,7 +121,7 @@ void MV_Mix16BitStereo16(struct VoiceNode const * const voice, uint32_t length)
uint32_t const rate = voice->RateScale;
float const volume = voice->volume;
while (length--)
do
{
int16_t const isample0 = B_LITTLE16(source[position >> 16]);
split16_t const usample0{FLIP_SIGN(SCALE_SAMPLE(isample0, volume))};
@ -132,9 +138,11 @@ void MV_Mix16BitStereo16(struct VoiceNode const * const voice, uint32_t length)
= (int16_t)clamp(sample1 + *(dest + (MV_RightChannelOffset >> 1)), INT16_MIN, INT16_MAX);
dest += MV_SampleSize >> 1;
}
while (--length);
MV_MixPosition = position;
MV_MixDestination = (char *)dest;
return position;
}
void MV_16BitReverb(char const *src, char *dest, const int16_t *volume, int32_t count)
@ -156,5 +164,6 @@ void MV_16BitReverb(char const *src, char *dest, const int16_t *volume, int32_t
sample0l = (volume)[sample0l] >> 8;
sample0h = (volume)[sample0h];
*output++ = (int16_t)(sample0l + sample0h + 128);
} while (--count > 0);
}
while (--count > 0);
}