snd_pcm_channel

Get the current configuration for the specified PCM channel

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_channel_setup( 
       snd_pcm_t *handle, 
       snd_pcm_channel_setup_t *setup );

Arguments:

handle: 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().
setup: A pointer to a snd_pcm_channel_setup_t structure that snd_pcm_channel_setup() fills with information about the PCM channel setup.
Set the setup structure's channel member to specify the direction. All other members are read-only.

Library:

libasound.so

Use the -l asound option with qcc to link against this library.

Description:

The snd_pcm_channel_setup() function fills the setup structure with data about the PCM channel's configuration.

Note: The ability to convert audio to match hardware capabilities (for example, voice conversion, rate conversion, type conversion, etc.) is enabled by default. As a result, this function behaves as snd_pcm_plugin_setup(), unless you've disabled the conversion by calling:

snd_pcm_plugin_set_disable(handle, PLUGIN_CONVERSION);

Returns:

EOK: Success.
-EINVAL: Invalid handle

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.