snd_pcm_plugin_set_voice_conversion()

Updated: May 06, 2022

Set the current voice conversion structure for a channel

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_plugin_set_voice_conversion (
       snd_pcm_t                  *handle,
       int                         channel,
       snd_pcm_voice_conversion_t *voice_conversion );

Arguments:

handle
The handle for the PCM device, which you must have opened by calling snd_pcm_open_name(), snd_pcm_open(), or snd_pcm_open_preferred().
channel
The channel direction; either SND_PCM_CHANNEL_CAPTURE or SND_PCM_CHANNEL_PLAYBACK.
voice_conversion
A pointer to a snd_pcm_voice_conversion_t structure that specifies how to convert the voices.

Library:

libasound.so

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

Description:

The snd_pcm_plugin_set_voice_conversion() function sets the current voice conversion structure for the specified channel. In QNX Neutrino 6.6 or later, this function instantiates the voice converter plugin if it doesn't already exist.

Returns:

EOK on success, a negative errno upon failure. The errno values are available in the errno.h file.

Errors:

-EINVAL
The state of handle is invalid, an invalid channel was provided as input, or an invalid state change occurred. You can call snd_pcm_plugin_status() to check if the state change was invalid.
-ENOENT
The voice converter plugin doesn't exist.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Read the Caveats

Caveats:

This function is not thread safe if handle (snd_pcm_t) is used across multiple threads.