Find the card number for a given name
Synopsis:
#include <sys/asoundlib.h>
int snd_card_name ( const char *string );
Arguments:
- string
- The name of the card.
Library:
libasound.so
Use the -l asound option with
qcc
to link against this library.
Description:
The snd_card_name() function returns the
card number associated with the given card name.
Returns:
A card number (positive integer), or a negative error code.
Errors:
- -EINVAL
- The string argument is NULL, an empty
string, or isn't the name of a card.
- -EACCES
- Search permission is denied on a component of the path prefix,
or the device exists and the permissions specified are denied.
- -EINTR
- The open() operation was interrupted by a signal.
- -EMFILE
- Too many file descriptors are currently in use by this process.
- -ENFILE
- Too many files are currently open in the system.
- -ENOENT
- The named device doesn't exist.
- -ENOMEM
- No memory available for data structure.
- -SND_ERROR_INCOMPATIBLE_VERSION
- The audio driver version is incompatible with the client library that the application is using.
Classification:
QNX Neutrino
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |