alsa-lib/include/pcm.h

/****************************************************************************
 *                                                                          *
 *                                pcm.h                                     *
 *                        Digital Audio Interface                           *
 *                                                                          *
 ****************************************************************************/
 
#define SND_PCM_OPEN_PLAYBACK	(O_WRONLY)
#define SND_PCM_OPEN_RECORD	(O_RDONLY)
#define SND_PCM_OPEN_DUPLEX	(O_RDWR)
 
#ifdef __cplusplus
extern "C" {
#endif

int snd_pcm_open( void **handle, int card, int device, int mode );
int snd_pcm_close( void *handle );
int snd_pcm_file_descriptor( void *handle );
int snd_pcm_block_mode( void *handle, int enable );
int snd_pcm_info( void *handle, snd_pcm_info_t *info );
int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info );
int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info );
int snd_pcm_playback_switches( void *handle );
int snd_pcm_playback_switch( void *handle, const char *switch_id );
int snd_pcm_playback_switch_read( void *handle, int switchn, snd_pcm_switch_t *data );
int snd_pcm_playback_switch_write( void *handle, int switchn, snd_pcm_switch_t *data ); 
int snd_pcm_record_switches( void *handle );
int snd_pcm_record_switch( void *handle, const char *switch_id );
int snd_pcm_record_switch_read( void *handle, int switchn, snd_pcm_switch_t *data );
int snd_pcm_record_switch_write( void *handle, int switchn, snd_pcm_switch_t *data ); 
int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format );
int snd_pcm_record_format( void *handle, snd_pcm_format_t *format );
int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params );
int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params );
int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status );
int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status );
int snd_pcm_drain_playback( void *handle );
int snd_pcm_flush_playback( void *handle );
int snd_pcm_flush_record( void *handle );
int snd_pcm_playback_pause( void *handle, int enable );
int snd_pcm_playback_time( void *handle, int enable );
int snd_pcm_record_time( void *handle, int enable );
ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size );
ssize_t snd_pcm_read( void *handle, void *buffer, size_t size );

#ifdef __cplusplus
}
#endif