40 lines
1004 B
C
40 lines
1004 B
C
/**
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* minigb_apu is released under the terms listed within the LICENSE file.
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*
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* minigb_apu emulates the audio processing unit (APU) of the Game Boy. This
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* project is based on MiniGBS by Alex Baines: https://github.com/baines/MiniGBS
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*/
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#pragma once
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#include <stdint.h>
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#define AUDIO_SAMPLE_RATE 32768
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#define DMG_CLOCK_FREQ 4194304.0
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#define SCREEN_REFRESH_CYCLES 70224.0
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#define VERTICAL_SYNC (DMG_CLOCK_FREQ/SCREEN_REFRESH_CYCLES)
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#define AUDIO_SAMPLES ((unsigned)(AUDIO_SAMPLE_RATE / VERTICAL_SYNC))
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/**
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* Fill allocated buffer "data" with "len" number of 32-bit floating point
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* samples (native endian order) in stereo interleaved format.
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*/
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void audio_callback(void *ptr, uint8_t *data, int len);
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/**
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* Read audio register at given address "addr".
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*/
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uint8_t audio_read(const uint16_t addr);
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/**
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* Write "val" to audio register at given address "addr".
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*/
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void audio_write(const uint16_t addr, const uint8_t val);
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/**
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* Initialise audio driver.
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*/
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void audio_init(void);
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