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Whoops, we weren't incrementing the sample counter for the PSG channels when using Lanczos resampling. Let's supersample them through the Lanczos resampler instead.

CQTexperiment
Chris Moeller 2013-10-15 20:51:28 -07:00
parent 7128273201
commit 71dcd91c6b
1 changed files with 28 additions and 2 deletions
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30
Frameworks/vio2sf/vio2sf/src/vio2sf/desmume/SPU.cpp
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@ -595,7 +595,7 @@ static FORCEINLINE void FetchADPCMDataInternal(SPUInterpolationMode INTERPOLATE_
*data = (s32)chan->pcm16b;
}
static FORCEINLINE void FetchPSGData(channel_struct *chan, s32 *data)
static FORCEINLINE void FetchPSGDataInternal(channel_struct *chan, s32 *data)
{
if(chan->num < 8)
{
@ -828,6 +828,32 @@ static FORCEINLINE void FetchADPCMData(SPUInterpolationMode INTERPOLATE_MODE, ND
lanczos_resampler_remove_sample(chan->lanczos_resampler);
}
static FORCEINLINE void FetchPSGData(SPUInterpolationMode INTERPOLATE_MODE, channel_struct *chan, s32 *data)
{
const double PSG_RATIO = 32.0;
const double PSG_DIVIDER = 1.0 / PSG_RATIO;
if (INTERPOLATE_MODE != SPUInterpolation_Lanczos)
return FetchPSGDataInternal(chan, data);
lanczos_resampler_set_rate( chan->lanczos_resampler, chan->sampinc * PSG_RATIO );
while (lanczos_resampler_get_free_count(chan->lanczos_resampler))
{
s32 sample;
FetchPSGDataInternal(chan, &sample);
chan->sampcnt += PSG_DIVIDER;
lanczos_resampler_write_sample(chan->lanczos_resampler, sample);
}
/* No need to check if resampler is empty since we always fill it completely,
* and PSG channels never report terminating on their own.
*/
*data = lanczos_resampler_get_sample(chan->lanczos_resampler);
lanczos_resampler_remove_sample(chan->lanczos_resampler);
}
FORCEINLINE static void SPU_Mix(int CHANNELS, SPU_struct* SPU, channel_struct *chan, s32 data)
{
switch(CHANNELS)
@ -850,7 +876,7 @@ FORCEINLINE static void ____SPU_ChanUpdate(NDS_state *state, int CHANNELS, int F
case 0: Fetch8BitData(INTERPOLATE_MODE, state, SPU, chan, &data); break;
case 1: Fetch16BitData(INTERPOLATE_MODE, state, SPU, chan, &data); break;
case 2: FetchADPCMData(INTERPOLATE_MODE, state, SPU, chan, &data); break;
case 3: FetchPSGData(chan, &data); break;
case 3: FetchPSGData(INTERPOLATE_MODE, chan, &data); break;
}
SPU_Mix(CHANNELS, SPU, chan, data);
}