snd_pcm_channel_params()
Set a PCM channel's configurable parameters
Synopsis:
#include <sys/asoundlib.h>
int snd_pcm_channel_params(
snd_pcm_t *handle,
snd_pcm_channel_params_t *params );
Arguments:
- handle
- The handle for the PCM device, which you must have opened by calling snd_pcm_open() or snd_pcm_open_preferred() .
- params
- A pointer to a snd_pcm_channel_params_t structure in which you've specified the PCM channel's configurable parameters. All members are write-only.
Library:
libasound.so
Use the -l asound option to qcc to link against this library.
Description:
The snd_pcm_channel_params() function sets up the transfer parameters according to the params structure.
You can call the function in SND_PCM_STATUS_NOTREADY (initial) and SND_PCM_STATUS_READY states; otherwise, snd_pcm_channel_params() returns -EBADFD.
If the parameters are valid (i.e. snd_pcm_channel_params() returns zero), the driver state is changed to SND_PCM_STATUS_READY.
Returns:
Zero on success, or a negative value on error.
Errors:
- -EINVAL
- Invalid handle or params
Classification:
QNX Neutrino
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |