37 lines
939 B
C
37 lines
939 B
C
#ifndef _AUDIO_H
|
|
#define _AUDIO_H
|
|
|
|
#include <stdint.h>
|
|
|
|
typedef struct {
|
|
void (*help)(void);
|
|
char *name;
|
|
|
|
// start of program
|
|
int (*init)(int argc, char **argv);
|
|
// at end of program
|
|
void (*deinit)(void);
|
|
|
|
void (*start)(int sample_rate);
|
|
|
|
// block of samples
|
|
void (*play)(short buf[], int samples);
|
|
void (*stop)(void);
|
|
|
|
// may be null if not implemented
|
|
void (*flush)(void);
|
|
|
|
// returns the delay before the next frame to be sent to the device would actually be audible.
|
|
// almost certainly wrong if the buffer is empty, so put silent buffers into it to make it busy.
|
|
// will change dynamically, so keep watching it. Implemented in ALSA only.
|
|
uint32_t (*delay)();
|
|
|
|
// may be NULL, in which case soft volume is applied
|
|
void (*volume)(double vol);
|
|
} audio_output;
|
|
|
|
audio_output *audio_get_output(char *name);
|
|
void audio_ls_outputs(void);
|
|
|
|
#endif //_AUDIO_H
|