Get information about a PCM channel's capabilities (plugin-aware)
#include <sys/asoundlib.h> int snd_pcm_plugin_info( snd_pcm_t *handle, snd_pcm_channel_info_t *info );
Before calling this function, set the info structure's channel member to specify the direction. This function sets all the other members.
libasound.so
The snd_pcm_plugin_info() function fills the info structure with data about the PCM channel selected by handle.
This function and the nonplugin version, snd_pcm_channel_info(), get a dynamic “snapshot” of the system's current capabilities, which can shrink and grow as subchannels are allocated and freed. They're similar to snd_ctl_pcm_channel_info(), which gets information about the complete capabilities of the system. |
Zero on success, or a negative error code (errno is set).
See the wave.c example in the appendix.
QNX Neutrino
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |
This function is the plugin-aware version of snd_pcm_channel_info(). 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.
snd_pcm_channel_info(), snd_pcm_channel_info_t