snd_pcm_plugin_params()
Set the configurable parameters for a PCM channel (plugin-aware)
Synopsis:
#include <sys/asoundlib.h> int snd_pcm_plugin_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
Use the -l asound option to qcc to link against this library.
Description:
The snd_pcm_plugin_params() function sets up the transfer parameters according to params.
You can call the function in SND_PCM_STATUS_NOTREADY (initial) and SND_PCM_STATUS_READY states; otherwise, snd_pcm_plugin_params() returns -EBADFD.
If the parameters are valid (i.e. snd_pcm_plugin_params() returns zero), the driver state is changed to SND_PCM_STATUS_READY.
Returns:
Zero, or a negative error code.
Errors:
- -EINVAL
- Invalid handle; the data pointer is NULL, or the format is unsupported.
Classification:
QNX Neutrino
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |
Caveats:
This function is the plugin-aware version of snd_pcm_channel_params() . It functions exactly the same way. However, make sure that you don't mix and match plugin- and nonplugin-aware functions in your application, or you may get undefined behavior and misleading results.