shithub: pt2-clone

ref: b2aa4b437c3ae681fbf34fe72ff148574954526e
dir: /src/pt2_audio.h/

#pragma once

#include <stdint.h>
#include <stdbool.h>

// for the low-pass/high-pass filters in the SAMPLER screen
#define FILTERS_BASE_FREQ (PAULA_PAL_CLK / 214.0)

typedef struct audio_t
{
	volatile bool locked, isSampling;

	bool ledFilterEnabled, oversamplingFlag;
	
	uint32_t amigaModel, outputRate, audioBufferSize;
	int64_t tickSampleCounter64, samplesPerTick64;
	int64_t samplesPerTickTable[256-32]; // 32.32 fixed-point

	// for audio sampling
	bool rescanAudioDevicesSupported;

	// for audio/video syncing
	bool resetSyncTickTimeFlag;
	uint64_t tickLengthTable[224];
} audio_t;

void setAmigaFilterModel(uint8_t model);
void toggleAmigaFilterModel(void);
void setLEDFilter(bool state);
void toggleLEDFilter(void);

void updateReplayerTimingMode(void);
void resetAudioDithering(void);
void generateBpmTable(double dAudioFreq, bool vblankTimingFlag);
uint16_t get16BitPeak(int16_t *sampleData, uint32_t sampleLength);
uint32_t get32BitPeak(int32_t *sampleData, uint32_t sampleLength);
float getFloatPeak(float *fSampleData, uint32_t sampleLength);
double getDoublePeak(double *dSampleData, uint32_t sampleLength);
void normalize16BitTo8Bit(int16_t *sampleData, uint32_t sampleLength);
void normalize32BitTo8Bit(int32_t *sampleData, uint32_t sampleLength);
void normalizeFloatTo8Bit(float *fSampleData, uint32_t sampleLength);
void normalizeDoubleTo8Bit(double *dSampleData, uint32_t sampleLength);
void toggleAmigaPanMode(void);
void lockAudio(void);
void unlockAudio(void);
void audioSetStereoSeparation(uint8_t percentage);
void outputAudio(int16_t *target, int32_t numSamples);
bool setupAudio(void);
void audioClose(void);

extern audio_t audio; // pt2_audio.c