Start a PCM channel running
#include <sys/asoundlib.h> int snd_pcm_channel_go ( snd_pcm_t *handle, int channel );
The function should be called in SND_PCM_STATUS_READY state. Calling this function is required if you've set your channel's start state to SND_PCM_START_GO (see snd_pcm_plugin_params()). You can also use this function to "kick start" early a channel that has a start state of SND_PCM_START_DATA or SND_PCM_START_FULL.
When you're using snd_pcm_channel_go() for playback, ensure that two or more audio fragments have been written into the audio interface before issuing the go command, to prevent the audio channel/stream from going into the UNDERRUN state.
If the parameters are valid (i.e., the function returns zero), then the driver state is changed to SND_PCM_STATUS_RUNNING.
This function is safe to use with plugin-aware functions. This call is used identically to snd_pcm_plugin_params().
EOK on success, a negative errno upon failure. The errno values are available in the errno.h file.
- The state of handle is invalid, an invalid channel was provided as input, or an invalid state change occurred. You can call snd_pcm_channel_status() to check if the state change was invalid.
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This function is not thread safe if handle (snd_pcm_t) is used across multiple threads.
Last modified: 2014-06-24