1. NAME▲

snd_pcm_playback_data - check whether any data exists on the playback buffer

2. SYNOPSIS ▲

int snd_pcm_playback_data(struct snd_pcm_substream *  substream );

3. ARGUMENTS ▲

substream
    the pcm substream instance

4. DESCRIPTION ▲

Checks whether any data exists on the playback buffer.

5. RETURN ▲

Non-zero if any data exists, or zero if not. If stop_threshold is bigger or equal to boundary, then this function returns always non-zero.

6. COPYRIGHT ▲