snd_pcm_playback_pause()
Pause a channel that's playing back
Synopsis:
#include <sys/asoundlib.h>
int snd_pcm_playback_pause ( snd_pcm_t *pcm );
Arguments:
- pcm
- The handle for the PCM device, which you must have opened by calling snd_pcm_open_name(), snd_pcm_open(), or snd_pcm_open_preferred().
Library:
libasound.so
Use the -l asound option with qcc to link against this library.
Description:
The snd_pcm_playback_pause() function pauses a channel that's playing back. Unlike dropping or draining, this preserves all data that has not yet played out within the audio driver, to be played out after resuming.
Returns:
EOK on success, a negative errno upon failure. The errno values are available in the errno.h file.
Errors:
Additional information for common error values:
- -EINVAL
- The state of handle is invalid or an invalid state change occurred. The other reason this value is returned is because the specified channel isn't being played.
- -EIO
- The channel isn't valid that was passed in was not set to SND_PCM_CHANNEL_PLAYBACK or SND_PCM_CHANNEL_CAPTURE.
- -ENOTSUP
- Pause isn't supported on the PCM device that's referenced by the PCM handle (pcm).
Classification:
QNX Neutrino
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Read the Caveats |
Caveats:
This function is not thread safe if handle (snd_pcm_t) is used across multiple threads.
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