sound/drivers/aloop.c

142 	struct snd_pcm_substream *substream;
194 	int device = dpcm->substream->pstr->pcm->device;
196 	if (dpcm->substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
198 	return &dpcm->loopback->setup[dpcm->substream->number][device];
244 		 * running. For example called by opposite substream
250 		pcm_err(dpcm->substream->pcm,
282 		pcm_err(dpcm->substream->pcm,
349 							substream->runtime;
351 							substream->runtime;
363 					substream, SNDRV_PCM_STATE_DRAINING);
366 							substream->runtime;
401 static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
403 	struct snd_pcm_runtime *runtime = substream->runtime;
406 	int err = 0, stream = 1 << substream->stream;
410 		err = loopback_check_format(cable, substream->stream);
421 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
430 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
439 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
449 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
458 static void params_change(struct snd_pcm_substream *substream)
460 	struct snd_pcm_runtime *runtime = substream->runtime;
478 static int loopback_prepare(struct snd_pcm_substream *substream)
480 	struct snd_pcm_runtime *runtime = substream->runtime;
500 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
514 	if (!(cable->valid & ~(1 << substream->stream)) ||
516 	     substream->stream == SNDRV_PCM_STREAM_PLAYBACK))
517 		params_change(substream);
518 	cable->valid |= 1 << substream->stream;
526 	struct snd_pcm_runtime *runtime = dpcm->substream->runtime;
553 	unsigned int channels = capt->substream->runtime->channels;
560 		memcpy(capt->substream->runtime->dma_area + capt->channel_buf_n * i + dst_off_ch,
561 		       play->substream->runtime->dma_area + play->channel_buf_n * i + src_off_ch,
570 	struct snd_pcm_runtime *runtime = play->substream->runtime;
572 	char *dst = capt->substream->runtime->dma_area;
707 			(1 << dpcm->substream->stream)) {
713 			snd_pcm_period_elapsed(dpcm->substream);
742 		pcm_err(dpcm->substream->pcm,
777 		    dpcm_play->substream->runtime->state !=
785 			dpcm_play->substream : NULL;
787 			dpcm_capt->substream : NULL;
789 				dpcm_play->substream->runtime :
790 				dpcm_capt->substream->runtime;
907 static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)
909 	struct snd_pcm_runtime *runtime = substream->runtime;
955 static int loopback_hw_free(struct snd_pcm_substream *substream)
957 	struct snd_pcm_runtime *runtime = substream->runtime;
962 	cable->valid &= ~(1 << substream->stream);
967 static unsigned int get_cable_index(struct snd_pcm_substream *substream)
969 	if (!substream->pcm->device)
970 		return substream->stream;
972 		return !substream->stream;
1039 static void free_cable(struct snd_pcm_substream *substream)
1041 	struct loopback *loopback = substream->private_data;
1042 	int dev = get_cable_index(substream);
1045 	cable = loopback->cables[substream->number][dev];
1048 	if (cable->streams[!substream->stream]) {
1051 		cable->streams[substream->stream] = NULL;
1054 		struct loopback_pcm *dpcm = substream->runtime->private_data;
1059 		loopback->cables[substream->number][dev] = NULL;
1160 		pcm_err(dpcm->substream->pcm,
1166 	cable->snd_timer.stream = dpcm->substream->stream;
1203 		pcm_err(dpcm->substream->pcm,
1230 static int loopback_open(struct snd_pcm_substream *substream)
1232 	struct snd_pcm_runtime *runtime = substream->runtime;
1233 	struct loopback *loopback = substream->private_data;
1237 	int dev = get_cable_index(substream);
1246 	dpcm->substream = substream;
1248 	cable = loopback->cables[substream->number][dev];
1261 		loopback->cables[substream->number][dev] = cable;
1319 	cable->streams[substream->stream] = dpcm;
1324 		free_cable(substream);
1331 static int loopback_close(struct snd_pcm_substream *substream)
1333 	struct loopback *loopback = substream->private_data;
1334 	struct loopback_pcm *dpcm = substream->runtime->private_data;
1340 	free_cable(substream);
1714 	snd_iprintf(buffer, "Cable %i substream %i:\n", num, sub);