snd_pcm_playback_hw_avail
snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) {
return snd_pcm_playback_hw_avail(substream->runtime);
delay = snd_pcm_playback_hw_avail(substream->runtime);
snd_pcm_playback_hw_avail(runtime) < runtime->buffer_size) {
avail = snd_pcm_playback_hw_avail(runtime);