58 static void do_silence(snd_pcm_t *pcm)  in do_silence()  argument
60 	snd_pcm_direct_t *dshare = pcm->private_data;  in do_silence()
107 static void snd_pcm_dshare_sync_area(snd_pcm_t *pcm)  in snd_pcm_dshare_sync_area()  argument
109 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_sync_area()
115 	size = pcm_frame_diff(dshare->appl_ptr, dshare->last_appl_ptr, pcm->boundary);  in snd_pcm_dshare_sync_area()
133 	src_areas = snd_pcm_mmap_areas(pcm);  in snd_pcm_dshare_sync_area()
135 	appl_ptr = dshare->last_appl_ptr % pcm->buffer_size;  in snd_pcm_dshare_sync_area()
137 	dshare->last_appl_ptr %= pcm->boundary;  in snd_pcm_dshare_sync_area()
143 		if (appl_ptr + transfer > pcm->buffer_size)  in snd_pcm_dshare_sync_area()
144 			transfer = pcm->buffer_size - appl_ptr;  in snd_pcm_dshare_sync_area()
154 		appl_ptr %= pcm->buffer_size;  in snd_pcm_dshare_sync_area()
161 static int snd_pcm_dshare_sync_ptr0(snd_pcm_t *pcm, snd_pcm_uframes_t slave_hw_ptr)  in snd_pcm_dshare_sync_ptr0()  argument
163 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_sync_ptr0()
177 	dshare->hw_ptr %= pcm->boundary;  in snd_pcm_dshare_sync_ptr0()
179 	if (pcm->stop_threshold >= pcm->boundary)	/* don't care */  in snd_pcm_dshare_sync_ptr0()
181 	avail = snd_pcm_mmap_playback_avail(pcm);  in snd_pcm_dshare_sync_ptr0()
184 	if (avail >= pcm->stop_threshold) {  in snd_pcm_dshare_sync_ptr0()
186 		do_silence(pcm);  in snd_pcm_dshare_sync_ptr0()
187 		gettimestamp(&dshare->trigger_tstamp, pcm->tstamp_type);  in snd_pcm_dshare_sync_ptr0()
199 static int snd_pcm_dshare_sync_ptr(snd_pcm_t *pcm)  in snd_pcm_dshare_sync_ptr()  argument
201 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_sync_ptr()
215 	if (snd_pcm_direct_client_chk_xrun(dshare, pcm))  in snd_pcm_dshare_sync_ptr()
220 	return snd_pcm_dshare_sync_ptr0(pcm, *dshare->spcm->hw.ptr);  in snd_pcm_dshare_sync_ptr()
227 static snd_pcm_state_t snd_pcm_dshare_state(snd_pcm_t *pcm);
229 static int snd_pcm_dshare_status(snd_pcm_t *pcm, snd_pcm_status_t * status)  in snd_pcm_dshare_status()  argument
231 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_status()
239 		snd_pcm_dshare_sync_ptr0(pcm, status->hw_ptr);  in snd_pcm_dshare_status()
240 		status->delay += snd_pcm_mmap_playback_delay(pcm);  in snd_pcm_dshare_status()
245 	status->state = snd_pcm_dshare_state(pcm);  in snd_pcm_dshare_status()
246 	status->hw_ptr = *pcm->hw.ptr; /* boundary may be different */  in snd_pcm_dshare_status()
247 	status->appl_ptr = *pcm->appl.ptr; /* slave PCM doesn't set appl_ptr */  in snd_pcm_dshare_status()
249 	status->avail = snd_pcm_mmap_playback_avail(pcm);  in snd_pcm_dshare_status()
255 static snd_pcm_state_t snd_pcm_dshare_state(snd_pcm_t *pcm)  in snd_pcm_dshare_state()  argument
257 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_state()
273 	snd_pcm_direct_client_chk_xrun(dshare, pcm);  in snd_pcm_dshare_state()
279 static int snd_pcm_dshare_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)  in snd_pcm_dshare_delay()  argument
281 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_delay()
287 		err = snd_pcm_dshare_sync_ptr(pcm);  in snd_pcm_dshare_delay()
294 		*delayp = snd_pcm_mmap_playback_delay(pcm);  in snd_pcm_dshare_delay()
305 static int snd_pcm_dshare_hwsync(snd_pcm_t *pcm)  in snd_pcm_dshare_hwsync()  argument
307 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_hwsync()
312 		return snd_pcm_dshare_sync_ptr(pcm);  in snd_pcm_dshare_hwsync()
325 static int snd_pcm_dshare_reset(snd_pcm_t *pcm)  in snd_pcm_dshare_reset()  argument
327 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_reset()
328 	dshare->hw_ptr %= pcm->period_size;  in snd_pcm_dshare_reset()
331 	snd_pcm_direct_reset_slave_ptr(pcm, dshare);  in snd_pcm_dshare_reset()
335 static int snd_pcm_dshare_start_timer(snd_pcm_t *pcm, snd_pcm_direct_t *dshare)  in snd_pcm_dshare_start_timer()  argument
341 	snd_pcm_direct_reset_slave_ptr(pcm, dshare);  in snd_pcm_dshare_start_timer()
349 static int snd_pcm_dshare_start(snd_pcm_t *pcm)  in snd_pcm_dshare_start()  argument
351 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_start()
357 	avail = snd_pcm_mmap_playback_hw_avail(pcm);  in snd_pcm_dshare_start()
363 		err = snd_pcm_dshare_start_timer(pcm, dshare);  in snd_pcm_dshare_start()
366 		snd_pcm_dshare_sync_area(pcm);  in snd_pcm_dshare_start()
368 	gettimestamp(&dshare->trigger_tstamp, pcm->tstamp_type);  in snd_pcm_dshare_start()
372 static int snd_pcm_dshare_drop(snd_pcm_t *pcm)  in snd_pcm_dshare_drop()  argument
374 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_drop()
379 	do_silence(pcm);  in snd_pcm_dshare_drop()
384 static int __snd_pcm_dshare_drain(snd_pcm_t *pcm)  in __snd_pcm_dshare_drain()  argument
386 	snd_pcm_direct_t *dshare = pcm->private_data;  in __snd_pcm_dshare_drain()
399 	if (pcm->mode & SND_PCM_NONBLOCK)  in __snd_pcm_dshare_drain()
402 		if (snd_pcm_mmap_playback_hw_avail(pcm) > 0)  in __snd_pcm_dshare_drain()
403 			snd_pcm_dshare_start(pcm);  in __snd_pcm_dshare_drain()
405 			snd_pcm_dshare_drop(pcm);  in __snd_pcm_dshare_drain()
411 		snd_pcm_dshare_drop(pcm);  in __snd_pcm_dshare_drain()
415 	stop_threshold = pcm->stop_threshold;  in __snd_pcm_dshare_drain()
416 	if (pcm->stop_threshold > pcm->buffer_size)  in __snd_pcm_dshare_drain()
417 		pcm->stop_threshold = pcm->buffer_size;  in __snd_pcm_dshare_drain()
420 		err = snd_pcm_dshare_sync_ptr(pcm);  in __snd_pcm_dshare_drain()
422 			snd_pcm_dshare_drop(pcm);  in __snd_pcm_dshare_drain()
426 			snd_pcm_dshare_sync_area(pcm);  in __snd_pcm_dshare_drain()
427 			snd_pcm_wait_nocheck(pcm, -1);  in __snd_pcm_dshare_drain()
438 	pcm->stop_threshold = stop_threshold;  in __snd_pcm_dshare_drain()
442 static int snd_pcm_dshare_drain(snd_pcm_t *pcm)  in snd_pcm_dshare_drain()  argument
446 	snd_pcm_lock(pcm);  in snd_pcm_dshare_drain()
447 	err = __snd_pcm_dshare_drain(pcm);  in snd_pcm_dshare_drain()
448 	snd_pcm_unlock(pcm);  in snd_pcm_dshare_drain()
452 static int snd_pcm_dshare_pause(snd_pcm_t *pcm ATTRIBUTE_UNUSED, int enable ATTRIBUTE_UNUSED)  in snd_pcm_dshare_pause()
457 static snd_pcm_sframes_t snd_pcm_dshare_rewindable(snd_pcm_t *pcm)  in snd_pcm_dshare_rewindable()  argument
459 	return snd_pcm_mmap_playback_hw_rewindable(pcm);  in snd_pcm_dshare_rewindable()
462 static snd_pcm_sframes_t snd_pcm_dshare_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames)  in snd_pcm_dshare_rewind()  argument
466 	avail = snd_pcm_dshare_rewindable(pcm);  in snd_pcm_dshare_rewind()
469 	snd_pcm_mmap_appl_backward(pcm, frames);  in snd_pcm_dshare_rewind()
473 static snd_pcm_sframes_t snd_pcm_dshare_forwardable(snd_pcm_t *pcm)  in snd_pcm_dshare_forwardable()  argument
475 	return snd_pcm_mmap_playback_avail(pcm);  in snd_pcm_dshare_forwardable()
478 static snd_pcm_sframes_t snd_pcm_dshare_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames)  in snd_pcm_dshare_forward()  argument
482 	avail = snd_pcm_dshare_forwardable(pcm);  in snd_pcm_dshare_forward()
485 	snd_pcm_mmap_appl_forward(pcm, frames);  in snd_pcm_dshare_forward()
489 static snd_pcm_sframes_t snd_pcm_dshare_readi(snd_pcm_t *pcm ATTRIBUTE_UNUSED, void *buffer ATTRIBU…  in snd_pcm_dshare_readi()
494 static snd_pcm_sframes_t snd_pcm_dshare_readn(snd_pcm_t *pcm ATTRIBUTE_UNUSED, void **bufs ATTRIBUT…  in snd_pcm_dshare_readn()
499 static int snd_pcm_dshare_close(snd_pcm_t *pcm)  in snd_pcm_dshare_close()  argument
501 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_close()
506 		do_silence(pcm);  in snd_pcm_dshare_close()
520 	pcm->private_data = NULL;  in snd_pcm_dshare_close()
525 static snd_pcm_sframes_t snd_pcm_dshare_mmap_commit(snd_pcm_t *pcm,  in snd_pcm_dshare_mmap_commit()  argument
529 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_mmap_commit()
542 	if (snd_pcm_direct_client_chk_xrun(dshare, pcm))  in snd_pcm_dshare_mmap_commit()
546 	snd_pcm_mmap_appl_forward(pcm, size);  in snd_pcm_dshare_mmap_commit()
548 		err = snd_pcm_dshare_start_timer(pcm, dshare);  in snd_pcm_dshare_mmap_commit()
553 		if ((err = snd_pcm_dshare_sync_ptr(pcm)) < 0)  in snd_pcm_dshare_mmap_commit()
560 		snd_pcm_dshare_sync_area(pcm);  in snd_pcm_dshare_mmap_commit()
562 		if (snd_pcm_mmap_playback_avail(pcm) < pcm->avail_min)  in snd_pcm_dshare_mmap_commit()
568 static snd_pcm_sframes_t snd_pcm_dshare_avail_update(snd_pcm_t *pcm)  in snd_pcm_dshare_avail_update()  argument
570 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_avail_update()
575 		if ((err = snd_pcm_dshare_sync_ptr(pcm)) < 0)  in snd_pcm_dshare_avail_update()
581 	return snd_pcm_mmap_playback_avail(pcm);  in snd_pcm_dshare_avail_update()
584 static int snd_pcm_dshare_htimestamp(snd_pcm_t *pcm,  in snd_pcm_dshare_htimestamp()  argument
588 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_htimestamp()
595 			snd_pcm_dshare_sync_ptr(pcm);  in snd_pcm_dshare_htimestamp()
596 		avail1 = snd_pcm_mmap_playback_avail(pcm);  in snd_pcm_dshare_htimestamp()
606 static void snd_pcm_dshare_dump(snd_pcm_t *pcm, snd_output_t *out)  in snd_pcm_dshare_dump()  argument
608 	snd_pcm_direct_t *dshare = pcm->private_data;  in snd_pcm_dshare_dump()
611 	if (pcm->setup) {  in snd_pcm_dshare_dump()
613 		snd_pcm_dump_setup(pcm, out);  in snd_pcm_dshare_dump()
694 	snd_pcm_t *pcm, *spcm = NULL;  in snd_pcm_dshare_open()  local
706 	ret = _snd_pcm_direct_new(&pcm, &dshare, SND_PCM_TYPE_DSHARE, name, opts, params, stream, mode);  in snd_pcm_dshare_open()
712 		pcm->ops = &snd_pcm_dshare_dummy_ops;  in snd_pcm_dshare_open()
713 		pcm->fast_ops = &snd_pcm_dshare_fast_dummy_ops;  in snd_pcm_dshare_open()
715 		pcm->ops = &snd_pcm_dshare_ops;  in snd_pcm_dshare_open()
716 		pcm->fast_ops = &snd_pcm_dshare_fast_ops;  in snd_pcm_dshare_open()
718 	pcm->private_data = dshare;  in snd_pcm_dshare_open()
826 	pcm->poll_fd = dshare->poll_fd;  in snd_pcm_dshare_open()
827 	pcm->poll_events = POLLIN;	/* it's different than other plugins */  in snd_pcm_dshare_open()
828 	pcm->tstamp_type = spcm->tstamp_type;  in snd_pcm_dshare_open()
829 	pcm->mmap_rw = 1;  in snd_pcm_dshare_open()
830 	snd_pcm_set_hw_ptr(pcm, &dshare->hw_ptr, -1, 0);  in snd_pcm_dshare_open()
831 	snd_pcm_set_appl_ptr(pcm, &dshare->appl_ptr, -1, 0);  in snd_pcm_dshare_open()
835 	*pcmp = pcm;  in snd_pcm_dshare_open()
857 	snd_pcm_free(pcm);  in snd_pcm_dshare_open()