C++ (Cpp) snd_pcm_dmix_start_timer示例

示例#1

文件： pcm_dmix.c 项目： ProfessorKaos64/steamlink-sdk

static int snd_pcm_dmix_start(snd_pcm_t *pcm)
{
	snd_pcm_direct_t *dmix = pcm->private_data;
	snd_pcm_sframes_t avail;
	int err;
	
	if (dmix->state != SND_PCM_STATE_PREPARED)
		return -EBADFD;
	avail = snd_pcm_mmap_playback_hw_avail(pcm);
	if (avail == 0)
		dmix->state = STATE_RUN_PENDING;
	else if (avail < 0)
		return 0;
	else {
		if ((err = snd_pcm_dmix_start_timer(pcm, dmix)) < 0)
			return err;
		snd_pcm_dmix_sync_area(pcm);
	}
	gettimestamp(&dmix->trigger_tstamp, pcm->tstamp_type);
	return 0;
}

示例#2

文件： pcm_dmix.c 项目： ysei/uclinux-2

static int snd_pcm_dmix_start(snd_pcm_t *pcm)
{
	snd_pcm_direct_t *dmix = pcm->private_data;
	snd_pcm_sframes_t avail;
	struct timeval tv;
	int err;
	
	if (dmix->state != SND_PCM_STATE_PREPARED)
		return -EBADFD;
	avail = snd_pcm_mmap_playback_hw_avail(pcm);
	if (avail == 0)
		dmix->state = STATE_RUN_PENDING;
	else if (avail < 0)
		return 0;
	else {
		if ((err = snd_pcm_dmix_start_timer(pcm, dmix)) < 0)
			return err;
		snd_pcm_dmix_sync_area(pcm);
	}
	gettimeofday(&tv, 0);
	dmix->trigger_tstamp.tv_sec = tv.tv_sec;
	dmix->trigger_tstamp.tv_nsec = tv.tv_usec * 1000L;
	return 0;
}