int snd_pcm_channel_go
(snd_pcm_t *handle, int channel);
int snd_pcm_playback_go
(snd_pcm_t *handle);
int snd_pcm_capture_go
(snd_pcm_t *handle);
Initiates the transfer for the specified direction. Function may be called only when the driver is in SND_PCM_STATUS_PREPARED state, otherwise -EBADFD error is returned. Function returns zero if successful, otherwise it returns an error code.
If the operation was successful (zero is returned), then the driver state is changed to SND_PCM_STATUS_RUNNING.
The transfer may be initiated also when other conditions are fulfiled. Please, consult the SND_PCM_START_MODE_* constants.