*参照元 [#p7053384]
#backlinks

*説明 [#yd555cd2]
-パス: [[linux-2.6.33/sound/core/pcm_lib.c]]

-FIXME: これは何?
--説明


**引数 [#a324901d]
-struct snd_pcm_substream *substream
--
--[[linux-2.6.33/snd_pcm_substream]]
-struct snd_pcm_runtime *runtime
--
--[[linux-2.6.33/snd_pcm_runtime]]


**返り値 [#b1fea8ed]
-int


**参考 [#i04cd681]


*実装 [#v7a217c4]
 static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream,
 				      struct snd_pcm_runtime *runtime)
 {
 	snd_pcm_uframes_t avail;
 
-
--[[linux-2.6.33/snd_pcm_uframes_t]]

 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		avail = snd_pcm_playback_avail(runtime);
 	else
 		avail = snd_pcm_capture_avail(runtime);
-
--[[linux-2.6.33/snd_pcm_playback_avail()]]
-
--[[linux-2.6.33/snd_pcm_capture_avail()]]

 	if (avail > runtime->avail_max)
 		runtime->avail_max = avail;
 	if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 		if (avail >= runtime->buffer_size) {
 			snd_pcm_drain_done(substream);
 			return -EPIPE;
 		}
-
--[[linux-2.6.33/snd_pcm_drain_done()]]

 	} else {
 		if (avail >= runtime->stop_threshold) {
 			xrun(substream);
 			return -EPIPE;
 		}
 	}
-
--[[linux-2.6.33/xrun()]]

 	if (avail >= runtime->control->avail_min)
 		wake_up(&runtime->sleep);
-
--[[linux-2.6.33/wake_up()]]

 	return 0;
 }


*コメント [#q365e3c1]


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