C++ (Cpp) snd_pcm_hw_fast_tstamp 예제들

예제 #1

파일: pcm_dsnoop.c 프로젝트: NieHao/R7000

static int snoop_timestamp(snd_pcm_t *pcm)
{
	snd_pcm_direct_t *dsnoop = pcm->private_data;
	snd_pcm_uframes_t ptr1 = -2LL /* invalid value */, ptr2;

	/* loop is required to sync hw.ptr with timestamp */
	while (1) {
		ptr2 = *dsnoop->spcm->hw.ptr;
		if (ptr1 == ptr2)
			break;
		ptr1 = ptr2;
		dsnoop->update_tstamp = snd_pcm_hw_fast_tstamp(dsnoop->spcm);
	}
	dsnoop->slave_hw_ptr = ptr1;
	return 0;
}

예제 #2

파일: pcm_dshare.c 프로젝트: ysei/uclinux-2

static int snd_pcm_dshare_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
{
	snd_pcm_direct_t *dshare = pcm->private_data;

	switch (dshare->state) {
	case SNDRV_PCM_STATE_DRAINING:
	case SNDRV_PCM_STATE_RUNNING:
		snd_pcm_dshare_sync_ptr(pcm);
		break;
	default:
		break;
	}
	memset(status, 0, sizeof(*status));
	status->state = snd_pcm_state(dshare->spcm);
	status->trigger_tstamp = dshare->trigger_tstamp;
	status->tstamp = snd_pcm_hw_fast_tstamp(dshare->spcm);
	status->avail = snd_pcm_mmap_playback_avail(pcm);
	status->avail_max = status->avail > dshare->avail_max ? status->avail : dshare->avail_max;
	dshare->avail_max = 0;
	return 0;
}