snd_pcm_file_descriptor()

Return the file descriptor of the connection to the PCM interface

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_file_descriptor( snd_pcm_t *handle, 
                             int channel );

Arguments:

handle
The handle for the PCM device, which you must have opened by calling snd_pcm_open() or snd_pcm_open_preferred() .
channel
The channel; SND_PCM_CHANNEL_CAPTURE or SND_PCM_CHANNEL_PLAYBACK.

Library:

libasound.so

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

Description:

The snd_pcm_file_descriptor() function returns the file descriptor of the connection to the PCM interface.

You can use this file descriptor for the select() synchronous multiplexer function (see the QNX Library Reference).

Returns:

The file descriptor of the connection to the PCM interface on success, or a negative error code.

Errors:

-EINVAL
Invalid handle argument.

Classification:

QNX Neutrino

Safety:
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes