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Return the file descriptor of the connection to the PCM interface
#include <sys/asoundlib.h>
int snd_pcm_file_descriptor( snd_pcm_t *handle,
int channel );
- 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.
libasound.so
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).
The file descriptor of the connection to the PCM interface on success, or a
negative error code.
- -EINVAL
- Invalid handle argument.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
select()
in the QNX Library Reference
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