audio.h File Reference

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

Data Structures
struct	BoardPowerOps
	Optional board-level power hooks. More...

Macros
#define	AUDIO_PLAYBACK_SAMPLE_RATE   (16000)
	PCM sample rate, in Hz, and rate of the clock seen by AudioPlaybackCB.

Typedefs
typedef const struct AudioDevice	AudioDevice
	Audio output device, defined by the driver implementation.
typedef void(*	AudioTransCB) (uint32_t *free_size)
	Request for more audio data.
typedef void(*	AudioPlaybackCB) (const int16_t *samples, size_t count, uint32_t sample_time, void *context)
	Observer of the mono PCM committed to DMA, including underrun silence.

Functions
bool	audio_set_playback_callback (AudioDevice *audio_device, AudioPlaybackCB cb, void *context)
	Register or unregister the playback observer.
void	audio_init (AudioDevice *audio_device)
	Initialize the audio device.
void	audio_start (AudioDevice *audio_device, AudioTransCB cb)
	Start playback.
uint32_t	audio_write (AudioDevice *audio_device, void *writeBuf, uint32_t size)
	Queue PCM data for playback.
void	audio_set_volume (AudioDevice *audio_device, int volume)
	Set the playback volume.
void	audio_stop (AudioDevice *audio_device)
	Stop playback.