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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

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