mirror of https://github.com/snes9xgit/snes9x.git
apu: Clean up a bit.
Also fixes MSU not reflecting input rate setting.
This commit is contained in:
BearOso
parent
49b7d45fd0
commit
eb24fd599f
139
apu/apu.cpp
139
apu/apu.cpp
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@ -5,6 +5,7 @@
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\*****************************************************************************/
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#include <cmath>
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#include <vector>
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#include "../snes9x.h"
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#include "apu.h"
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#include "../msu1.h"
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@ -36,10 +37,10 @@ namespace spc {
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static apu_callback callback = NULL;
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static void *callback_data = NULL;
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static bool8 sound_in_sync = TRUE;
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static bool8 sound_enabled = FALSE;
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static bool8 sound_in_sync = true;
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static bool8 sound_enabled = false;
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static Resampler *resampler = NULL;
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static Resampler resampler;
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static int32 reference_time;
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static uint32 remainder;
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@ -56,9 +57,8 @@ static double dynamic_rate_multiplier = 1.0;
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namespace msu {
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// Always 16-bit, Stereo; 1.5x dsp buffer to never overflow
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static Resampler *resampler = NULL;
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static int16 *resample_buffer = NULL;
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static int resample_buffer_size = 0;
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static Resampler resampler;
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static std::vector<int16_t> resampler_buffer;
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} // namespace msu
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static void UpdatePlaybackRate(void);
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@ -74,44 +74,32 @@ bool8 S9xMixSamples(uint8 *dest, int sample_count)
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{
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memset(out, 0, sample_count << 1);
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S9xClearSamples();
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spc::sound_in_sync = true;
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return true;
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}
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else
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{
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if (spc::resampler->avail() >= sample_count)
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{
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spc::resampler->read((short *)out, sample_count);
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if (Settings.MSU1)
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{
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if (msu::resampler->avail() >= sample_count)
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{
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if (msu::resample_buffer_size < sample_count)
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{
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if (msu::resample_buffer)
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delete[] msu::resample_buffer;
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msu::resample_buffer = new int16[sample_count];
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msu::resample_buffer_size = sample_count;
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}
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msu::resampler->read(msu::resample_buffer,
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sample_count);
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for (int i = 0; i < sample_count; ++i)
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{
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int32 mixed = (int32)out[i] + msu::resample_buffer[i];
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out[i] = ((int16)mixed != mixed) ? (mixed >> 31) ^ 0x7fff : mixed;
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}
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}
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else // should never occur
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assert(0);
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}
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}
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else
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if (spc::resampler.avail() < sample_count)
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{
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memset(out, 0, sample_count << 1);
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return false;
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}
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spc::resampler.read((short *)out, sample_count);
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if (Settings.MSU1)
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{
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if ((int)msu::resampler_buffer.size() < sample_count)
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msu::resampler_buffer.resize(sample_count);
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msu::resampler.read(msu::resampler_buffer.data(), sample_count);
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for (int i = 0; i < sample_count; ++i)
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{
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int32 mixed = (int32)out[i] + msu::resampler_buffer[i];
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out[i] = ((int16)mixed != mixed) ? (mixed >> 31) ^ 0x7fff : mixed;
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}
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}
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if (spc::resampler->space_empty() >= 535 * 2 || !Settings.SoundSync ||
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if (spc::resampler.space_empty() >= 535 * 2 || !Settings.SoundSync ||
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Settings.TurboMode || Settings.Mute)
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spc::sound_in_sync = true;
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else
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@ -122,9 +110,9 @@ bool8 S9xMixSamples(uint8 *dest, int sample_count)
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int S9xGetSampleCount(void)
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{
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int avail = spc::resampler->avail();
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int avail = spc::resampler.avail();
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if (Settings.MSU1) // return minimum available samples, otherwise we can run into the assert above due to partial sample generation in msu1
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avail = Resampler::min(avail, msu::resampler->avail());
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avail = Resampler::min(avail, msu::resampler.avail());
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return avail;
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}
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@ -133,7 +121,7 @@ void S9xLandSamples(void)
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if (spc::callback != NULL)
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spc::callback(spc::callback_data);
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if (spc::resampler->space_empty() >= 535 * 2 || !Settings.SoundSync ||
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if (spc::resampler.space_empty() >= 535 * 2 || !Settings.SoundSync ||
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Settings.TurboMode || Settings.Mute)
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spc::sound_in_sync = true;
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else
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@ -142,15 +130,15 @@ void S9xLandSamples(void)
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void S9xClearSamples(void)
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{
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spc::resampler->clear();
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spc::resampler.clear();
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if (Settings.MSU1)
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msu::resampler->clear();
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msu::resampler.clear();
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}
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bool8 S9xSyncSound(void)
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{
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if (!Settings.SoundSync || spc::sound_in_sync)
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return (TRUE);
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return true;
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S9xLandSamples();
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@ -183,12 +171,12 @@ static void UpdatePlaybackRate(void)
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time_ratio *= spc::dynamic_rate_multiplier;
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}
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spc::resampler->time_ratio(time_ratio);
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spc::resampler.time_ratio(time_ratio);
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if (Settings.MSU1)
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{
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time_ratio = (44100.0 / Settings.SoundPlaybackRate) * (Settings.SoundInputRate / 32040.0);
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msu::resampler->time_ratio(time_ratio);
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time_ratio = time_ratio * 44100 / 32040;
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msu::resampler.time_ratio(time_ratio);
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}
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}
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@ -201,27 +189,11 @@ bool8 S9xInitSound(int buffer_ms)
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if (requested_buffer_size_samples > buffer_size_samples)
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buffer_size_samples = requested_buffer_size_samples;
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if (!spc::resampler)
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{
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spc::resampler = new Resampler(buffer_size_samples);
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if (!spc::resampler)
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return (FALSE);
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}
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else
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spc::resampler->resize(buffer_size_samples);
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spc::resampler.resize(buffer_size_samples);
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msu::resampler.resize(buffer_size_samples * 3 / 2);
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if (!msu::resampler)
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{
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msu::resampler = new Resampler(buffer_size_samples * 3 / 2);
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if (!msu::resampler)
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return (FALSE);
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}
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else
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msu::resampler->resize(buffer_size_samples * 3 / 2);
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SNES::dsp.spc_dsp.set_output(spc::resampler);
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S9xMSU1SetOutput(msu::resampler);
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SNES::dsp.spc_dsp.set_output(&spc::resampler);
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S9xMSU1SetOutput(&msu::resampler);
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UpdatePlaybackRate();
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@ -239,7 +211,7 @@ void S9xSetSoundMute(bool8 mute)
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{
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Settings.Mute = mute;
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if (!spc::sound_enabled)
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Settings.Mute = TRUE;
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Settings.Mute = true;
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}
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void S9xDumpSPCSnapshot(void)
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@ -255,27 +227,16 @@ static void SPCSnapshotCallback(void)
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bool8 S9xInitAPU(void)
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{
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spc::resampler = NULL;
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msu::resampler = NULL;
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spc::resampler.clear();
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msu::resampler.clear();
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return (TRUE);
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return true;
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}
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void S9xDeinitAPU(void)
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{
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if (spc::resampler)
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{
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delete spc::resampler;
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spc::resampler = NULL;
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}
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if (msu::resampler)
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{
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delete msu::resampler;
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msu::resampler = NULL;
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}
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S9xMSU1DeInit();
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msu::resampler_buffer.clear();
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}
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static inline int S9xAPUGetClock(int32 cpucycles)
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@ -309,10 +270,10 @@ void S9xAPUSetReferenceTime(int32 cpucycles)
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void S9xAPUExecute(void)
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{
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SNES::smp.clock -= S9xAPUGetClock(CPU.Cycles);
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SNES::smp.enter();
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int cycles = S9xAPUGetClock(CPU.Cycles);
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spc::remainder = S9xAPUGetClockRemainder(CPU.Cycles);
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SNES::smp.clock -= cycles;
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SNES::smp.enter();
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S9xAPUSetReferenceTime(CPU.Cycles);
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}
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@ -322,7 +283,7 @@ void S9xAPUEndScanline(void)
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S9xAPUExecute();
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SNES::dsp.synchronize();
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if (spc::resampler->space_filled() >= APU_SAMPLE_BLOCK || !spc::sound_in_sync)
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if (spc::resampler.space_filled() >= APU_SAMPLE_BLOCK)
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S9xLandSamples();
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}
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@ -518,9 +479,9 @@ bool8 S9xSPCDump(const char *filename)
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fs = fopen(filename, "wb");
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if (!fs)
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return (FALSE);
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return false;
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S9xSetSoundMute(TRUE);
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S9xSetSoundMute(true);
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SNES::smp.save_spc(buf);
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@ -533,7 +494,7 @@ bool8 S9xSPCDump(const char *filename)
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fclose(fs);
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S9xSetSoundMute(FALSE);
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S9xSetSoundMute(false);
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return (TRUE);
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return true;
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}
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