Emulation/Mesen2
1
0
Fork 0
mirror of https://github.com/SourMesen/Mesen2.git synced 2025-04-02 10:21:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

Linux: Slow down audio playback when emulation speed is set to less than 100%

Browse source
This commit is contained in:
Sour 2024-12-03 21:30:31 +09:00
parent fb9fba041a
commit 94d88ecbe2
3 changed files with 15 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
Core/Shared/Audio/SoundMixer.cpp
View file

@ -18,6 +18,7 @@ SoundMixer::SoundMixer(Emulator* emu)
_audioDevice = nullptr;
_resampler.reset(new SoundResampler(emu));
_sampleBuffer = new int16_t[0x10000];
_pitchAdjustBuffer = new int16_t[0x10000];
_reverbFilter.reset(new ReverbFilter());
_crossFeedFilter.reset(new CrossFeedFilter());
}
@ -25,6 +26,7 @@ SoundMixer::SoundMixer(Emulator* emu)
SoundMixer::~SoundMixer()
{
delete[] _sampleBuffer;
delete[] _pitchAdjustBuffer;
}
void SoundMixer::RegisterAudioDevice(IAudioDevice *audioDevice)
@ -141,6 +143,14 @@ void SoundMixer::PlayAudioBuffer(int16_t* samples, uint32_t sampleCount, uint32_
//(this is to prevent playing an audio blip when loading a save state)
if(!_emu->IsPaused() && _audioDevice) {
if(cfg.EnableAudio) {
uint32_t emulationSpeed = _emu->GetSettings()->GetEmulationSpeed();
if(emulationSpeed > 0 && emulationSpeed < 100) {
//Slow down playback when playing at less than 100% speed
_pitchAdjust.SetSampleRates(targetRate, targetRate * 100.0 / emulationSpeed);
count = _pitchAdjust.Resample<false>(_sampleBuffer, count, _pitchAdjustBuffer, 0x10000);
out = _pitchAdjustBuffer;
}
_audioDevice->PlayBuffer(out, count, cfg.SampleRate, true);
_audioDevice->ProcessEndOfFrame();
} else {

4
Core/Shared/Audio/SoundMixer.h
View file

@ -2,6 +2,7 @@
#include "pch.h"
#include "Core/Shared/Interfaces/IAudioDevice.h"
#include "Utilities/safe_ptr.h"
#include "Utilities/Audio/HermiteResampler.h"
class Emulator;
class Equalizer;
@ -22,6 +23,9 @@ private:
safe_ptr<WaveRecorder> _waveRecorder;
int16_t *_sampleBuffer = nullptr;
HermiteResampler _pitchAdjust;
int16_t* _pitchAdjustBuffer = nullptr;
int16_t _leftSample = 0;
int16_t _rightSample = 0;

7
Windows/SoundManager.cpp
View file

@ -274,12 +274,7 @@ void SoundManager::ProcessEndOfFrame()
ValidateWriteCursor(safeWriteCursor);
uint32_t emulationSpeed = _emu->GetSettings()->GetEmulationSpeed();
uint32_t targetRate = _sampleRate;
if(emulationSpeed > 0 && emulationSpeed < 100) {
//Slow down playback when playing at less than 100%
targetRate = (uint32_t)(targetRate * ((double)emulationSpeed / 100.0));
}
_secondaryBuffer->SetFrequency((DWORD)(targetRate));
_secondaryBuffer->SetFrequency((DWORD)(_sampleRate));
ProcessLatency(currentPlayCursor, _lastWriteOffset);