Mesen2/Core/Shared/Audio/PcmReader.h
2022-09-08 21:29:52 -04:00

44 lines
975 B
C++

#pragma once
#include "pch.h"
#include "Utilities/Audio/stb_vorbis.h"
#include "Utilities/Audio/HermiteResampler.h"
class PcmReader
{
private:
static constexpr int PcmSampleRate = 44100;
static constexpr int SamplesToRead = 100;
int16_t* _outputBuffer = nullptr;
ifstream _file;
uint32_t _fileOffset = 0;
uint32_t _fileSize = 0;
uint32_t _loopOffset = 0;
int16_t _prevLeft = 0;
int16_t _prevRight = 0;
bool _loop = false;
bool _done = false;
HermiteResampler _resampler;
vector<int16_t> _pcmBuffer;
uint32_t _leftoverSampleCount = 0;
uint32_t _sampleRate = 0;
void LoadSamples(uint32_t samplesToLoad);
void ReadSample(int16_t &left, int16_t &right);
public:
PcmReader();
~PcmReader();
bool Init(string filename, bool loop, uint32_t startOffset = 0);
bool IsPlaybackOver();
void SetSampleRate(uint32_t sampleRate);
void SetLoopFlag(bool loop);
void ApplySamples(int16_t* buffer, size_t sampleCount, uint8_t volume);
uint32_t GetOffset();
};