snd_pcm_plugin_write()

Transfer PCM stream to playback subdevice

Synopsis:

#include <sys/asoundlib.h>

ssize_t snd_pcm_plugin_write( snd_pcm_t * handle, 
                              const void * buffer,
                              size_t size );

Library:

libasound.so

Description:

The snd_pcm_plugin_write() function writes samples that's in the proper format to the device specified by snd_pcm_plugin_prepare().

Errors:

-EAGAIN

Try again later. The subchannel is opened nonblock (block and stream mode), or is in paused state (block mode).

-EINVAL

The channel isn't in the prepared or running state. In block mode: count isn't an even multiple of setup ->buf.block.frag_size. In stream mode: the format is set as interleaved (not allowed).

-EIO

Invalid mode (valid modes include: SND_PCM_MODE_BLOCK and SND_PCM_MODE_STREAM). In block mode: no space in buffers and subchannel isn't running, or the subchannel isn't in the prepared or running state. In stream mode: underrun.

-EWOULDBLOCK

Write would have blocked (nonblocking write).

Examples:

See the example in Handling writes in the Playing audio data chapter.

Classification:

ALSA

See also:

snd_pcm_plugin_prepare()