2 This file is part of PulseAudio.
4 Copyright 2004-2008 Lennart Poettering
5 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2 of the License,
10 or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #include <asoundlib.h>
31 #ifdef HAVE_VALGRIND_MEMCHECK_H
32 #include <valgrind/memcheck.h>
35 #include <pulse/xmalloc.h>
36 #include <pulse/util.h>
37 #include <pulse/timeval.h>
39 #include <pulsecore/core.h>
40 #include <pulsecore/module.h>
41 #include <pulsecore/memchunk.h>
42 #include <pulsecore/sink.h>
43 #include <pulsecore/modargs.h>
44 #include <pulsecore/core-util.h>
45 #include <pulsecore/sample-util.h>
46 #include <pulsecore/log.h>
47 #include <pulsecore/macro.h>
48 #include <pulsecore/thread.h>
49 #include <pulsecore/core-error.h>
50 #include <pulsecore/thread-mq.h>
51 #include <pulsecore/rtpoll.h>
52 #include <pulsecore/rtclock.h>
53 #include <pulsecore/time-smoother.h>
55 #include "alsa-util.h"
56 #include "alsa-sink.h"
58 #define DEFAULT_DEVICE "default"
59 #define DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s */
60 #define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms */
61 #define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
62 #define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
70 pa_thread_mq thread_mq;
73 snd_pcm_t *pcm_handle;
75 pa_alsa_fdlist *mixer_fdl;
76 snd_mixer_t *mixer_handle;
77 snd_mixer_elem_t *mixer_elem;
78 long hw_volume_max, hw_volume_min;
79 long hw_dB_max, hw_dB_min;
80 pa_bool_t hw_dB_supported;
81 pa_bool_t mixer_seperate_channels;
82 pa_cvolume hardware_volume;
84 size_t frame_size, fragment_size, hwbuf_size, tsched_watermark;
90 pa_bool_t use_mmap, use_tsched;
92 pa_bool_t first, after_rewind;
94 pa_rtpoll_item *alsa_rtpoll_item;
96 snd_mixer_selem_channel_id_t mixer_map[SND_MIXER_SCHN_LAST];
98 pa_smoother *smoother;
100 uint64_t since_start;
102 snd_pcm_sframes_t hwbuf_unused_frames;
105 static void userdata_free(struct userdata *u);
107 static void fix_tsched_watermark(struct userdata *u) {
109 size_t min_sleep, min_wakeup;
112 max_use = u->hwbuf_size - (size_t) u->hwbuf_unused_frames * u->frame_size;
114 min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->sink->sample_spec);
115 min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->sink->sample_spec);
117 if (min_sleep > max_use/2)
118 min_sleep = pa_frame_align(max_use/2, &u->sink->sample_spec);
119 if (min_sleep < u->frame_size)
120 min_sleep = u->frame_size;
122 if (min_wakeup > max_use/2)
123 min_wakeup = pa_frame_align(max_use/2, &u->sink->sample_spec);
124 if (min_wakeup < u->frame_size)
125 min_wakeup = u->frame_size;
127 if (u->tsched_watermark > max_use-min_sleep)
128 u->tsched_watermark = max_use-min_sleep;
130 if (u->tsched_watermark < min_wakeup)
131 u->tsched_watermark = min_wakeup;
134 static void hw_sleep_time(struct userdata *u, pa_usec_t *sleep_usec, pa_usec_t*process_usec) {
137 pa_assert(sleep_usec);
138 pa_assert(process_usec);
142 usec = pa_sink_get_requested_latency_within_thread(u->sink);
144 if (usec == (pa_usec_t) -1)
145 usec = pa_bytes_to_usec(u->hwbuf_size, &u->sink->sample_spec);
147 /* pa_log_debug("hw buffer time: %u ms", (unsigned) (usec / PA_USEC_PER_MSEC)); */
149 wm = pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec);
152 *sleep_usec = usec - wm;
155 *process_usec = *sleep_usec = usec / 2;
157 /* pa_log_debug("after watermark: %u ms", (unsigned) (*sleep_usec / PA_USEC_PER_MSEC)); */
160 static int try_recover(struct userdata *u, const char *call, int err) {
165 pa_log_debug("%s: %s", call, snd_strerror(err));
167 pa_assert(err != -EAGAIN);
170 pa_log_debug("%s: Buffer underrun!", call);
172 if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0) {
178 pa_log("%s: %s", call, snd_strerror(err));
182 static size_t check_left_to_play(struct userdata *u, snd_pcm_sframes_t n) {
185 if ((size_t) n*u->frame_size < u->hwbuf_size)
186 left_to_play = u->hwbuf_size - ((size_t) n*u->frame_size);
190 if (left_to_play > 0) {
191 /* pa_log_debug("%0.2f ms left to play", (double) pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) / PA_USEC_PER_MSEC); */
192 } else if (!u->first && !u->after_rewind) {
193 pa_log_info("Underrun!");
196 size_t old_watermark = u->tsched_watermark;
198 u->tsched_watermark *= 2;
199 fix_tsched_watermark(u);
201 if (old_watermark != u->tsched_watermark)
202 pa_log_notice("Increasing wakeup watermark to %0.2f ms",
203 (double) pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec) / PA_USEC_PER_MSEC);
210 static int mmap_write(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled) {
212 pa_usec_t max_sleep_usec = 0, process_usec = 0;
216 pa_sink_assert_ref(u->sink);
219 hw_sleep_time(u, &max_sleep_usec, &process_usec);
225 snd_pcm_hwsync(u->pcm_handle);
227 /* First we determine how many samples are missing to fill the
228 * buffer up to 100% */
230 if (PA_UNLIKELY((n = pa_alsa_safe_avail_update(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
232 if ((r = try_recover(u, "snd_pcm_avail_update", (int) n)) == 0)
238 left_to_play = check_left_to_play(u, n);
242 /* We won't fill up the playback buffer before at least
243 * half the sleep time is over because otherwise we might
244 * ask for more data from the clients then they expect. We
245 * need to guarantee that clients only have to keep around
246 * a single hw buffer length. */
249 pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) > process_usec+max_sleep_usec/2)
252 if (PA_UNLIKELY(n <= u->hwbuf_unused_frames)) {
254 if (polled && pa_log_ratelimit())
255 pa_log("ALSA woke us up to write new data to the device, but there was actually nothing to write! "
256 "Most likely this is an ALSA driver bug. Please report this issue to the ALSA developers. "
257 "We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail_update() returned 0.");
262 n -= u->hwbuf_unused_frames;
266 /* pa_log_debug("Filling up"); */
272 const snd_pcm_channel_area_t *areas;
273 snd_pcm_uframes_t offset, frames = (snd_pcm_uframes_t) n;
274 snd_pcm_sframes_t sframes;
276 /* pa_log_debug("%lu frames to write", (unsigned long) frames); */
278 if (PA_UNLIKELY((err = pa_alsa_safe_mmap_begin(u->pcm_handle, &areas, &offset, &frames, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
280 if ((r = try_recover(u, "snd_pcm_mmap_begin", err)) == 0)
286 /* Make sure that if these memblocks need to be copied they will fit into one slot */
287 if (frames > pa_mempool_block_size_max(u->sink->core->mempool)/u->frame_size)
288 frames = pa_mempool_block_size_max(u->sink->core->mempool)/u->frame_size;
290 /* Check these are multiples of 8 bit */
291 pa_assert((areas[0].first & 7) == 0);
292 pa_assert((areas[0].step & 7)== 0);
294 /* We assume a single interleaved memory buffer */
295 pa_assert((areas[0].first >> 3) == 0);
296 pa_assert((areas[0].step >> 3) == u->frame_size);
298 p = (uint8_t*) areas[0].addr + (offset * u->frame_size);
300 chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, TRUE);
301 chunk.length = pa_memblock_get_length(chunk.memblock);
304 pa_sink_render_into_full(u->sink, &chunk);
306 /* FIXME: Maybe we can do something to keep this memory block
307 * a little bit longer around? */
308 pa_memblock_unref_fixed(chunk.memblock);
310 if (PA_UNLIKELY((sframes = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0)) {
312 if ((r = try_recover(u, "snd_pcm_mmap_commit", (int) sframes)) == 0)
320 u->frame_index += (int64_t) frames;
321 u->since_start += frames * u->frame_size;
323 /* pa_log_debug("wrote %lu frames", (unsigned long) frames); */
325 if (frames >= (snd_pcm_uframes_t) n)
328 n -= (snd_pcm_sframes_t) frames;
332 *sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) - process_usec;
336 static int unix_write(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled) {
338 pa_usec_t max_sleep_usec = 0, process_usec = 0;
342 pa_sink_assert_ref(u->sink);
345 hw_sleep_time(u, &max_sleep_usec, &process_usec);
351 snd_pcm_hwsync(u->pcm_handle);
353 if (PA_UNLIKELY((n = pa_alsa_safe_avail_update(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
355 if ((r = try_recover(u, "snd_pcm_avail_update", (int) n)) == 0)
361 left_to_play = check_left_to_play(u, n);
365 /* We won't fill up the playback buffer before at least
366 * half the sleep time is over because otherwise we might
367 * ask for more data from the clients then they expect. We
368 * need to guarantee that clients only have to keep around
369 * a single hw buffer length. */
372 pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) > process_usec+max_sleep_usec/2)
375 if (PA_UNLIKELY(n <= u->hwbuf_unused_frames)) {
377 if (polled && pa_log_ratelimit())
378 pa_log("ALSA woke us up to write new data to the device, but there was actually nothing to write! "
379 "Most likely this is an ALSA driver bug. Please report this issue to the ALSA developers. "
380 "We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail_update() returned 0.");
385 n -= u->hwbuf_unused_frames;
390 snd_pcm_sframes_t frames;
393 /* pa_log_debug("%lu frames to write", (unsigned long) frames); */
395 if (u->memchunk.length <= 0)
396 pa_sink_render(u->sink, (size_t) n * u->frame_size, &u->memchunk);
398 pa_assert(u->memchunk.length > 0);
400 frames = (snd_pcm_sframes_t) (u->memchunk.length / u->frame_size);
405 p = pa_memblock_acquire(u->memchunk.memblock);
406 frames = snd_pcm_writei(u->pcm_handle, (const uint8_t*) p + u->memchunk.index, (snd_pcm_uframes_t) frames);
407 pa_memblock_release(u->memchunk.memblock);
409 pa_assert(frames != 0);
411 if (PA_UNLIKELY(frames < 0)) {
413 if ((r = try_recover(u, "snd_pcm_writei", (int) frames)) == 0)
419 u->memchunk.index += (size_t) frames * u->frame_size;
420 u->memchunk.length -= (size_t) frames * u->frame_size;
422 if (u->memchunk.length <= 0) {
423 pa_memblock_unref(u->memchunk.memblock);
424 pa_memchunk_reset(&u->memchunk);
429 u->frame_index += frames;
430 u->since_start += (size_t) frames * u->frame_size;
432 /* pa_log_debug("wrote %lu frames", (unsigned long) frames); */
441 *sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) - process_usec;
445 static void update_smoother(struct userdata *u) {
446 snd_pcm_sframes_t delay = 0;
449 pa_usec_t now1, now2;
450 /* struct timeval timestamp; */
451 snd_pcm_status_t *status;
453 snd_pcm_status_alloca(&status);
456 pa_assert(u->pcm_handle);
458 /* Let's update the time smoother */
460 snd_pcm_hwsync(u->pcm_handle);
461 snd_pcm_avail_update(u->pcm_handle);
463 /* if (PA_UNLIKELY((err = snd_pcm_status(u->pcm_handle, status)) < 0)) { */
464 /* pa_log("Failed to query DSP status data: %s", snd_strerror(err)); */
468 /* delay = snd_pcm_status_get_delay(status); */
470 if (PA_UNLIKELY((err = snd_pcm_delay(u->pcm_handle, &delay)) < 0)) {
471 pa_log("Failed to query DSP status data: %s", snd_strerror(err));
475 frames = u->frame_index - delay;
477 /* pa_log_debug("frame_index = %llu, delay = %llu, p = %llu", (unsigned long long) u->frame_index, (unsigned long long) delay, (unsigned long long) frames); */
479 /* snd_pcm_status_get_tstamp(status, ×tamp); */
480 /* pa_rtclock_from_wallclock(×tamp); */
481 /* now1 = pa_timeval_load(×tamp); */
483 now1 = pa_rtclock_usec();
484 now2 = pa_bytes_to_usec((uint64_t) frames * u->frame_size, &u->sink->sample_spec);
485 pa_smoother_put(u->smoother, now1, now2);
488 static pa_usec_t sink_get_latency(struct userdata *u) {
491 pa_usec_t now1, now2;
495 now1 = pa_rtclock_usec();
496 now2 = pa_smoother_get(u->smoother, now1);
498 delay = (int64_t) pa_bytes_to_usec((uint64_t) u->frame_index * u->frame_size, &u->sink->sample_spec) - (int64_t) now2;
501 r = (pa_usec_t) delay;
503 if (u->memchunk.memblock)
504 r += pa_bytes_to_usec(u->memchunk.length, &u->sink->sample_spec);
509 static int build_pollfd(struct userdata *u) {
511 pa_assert(u->pcm_handle);
513 if (u->alsa_rtpoll_item)
514 pa_rtpoll_item_free(u->alsa_rtpoll_item);
516 if (!(u->alsa_rtpoll_item = pa_alsa_build_pollfd(u->pcm_handle, u->rtpoll)))
522 static int suspend(struct userdata *u) {
524 pa_assert(u->pcm_handle);
526 pa_smoother_pause(u->smoother, pa_rtclock_usec());
528 /* Let's suspend -- we don't call snd_pcm_drain() here since that might
529 * take awfully long with our long buffer sizes today. */
530 snd_pcm_close(u->pcm_handle);
531 u->pcm_handle = NULL;
533 if (u->alsa_rtpoll_item) {
534 pa_rtpoll_item_free(u->alsa_rtpoll_item);
535 u->alsa_rtpoll_item = NULL;
538 pa_log_info("Device suspended...");
543 static int update_sw_params(struct userdata *u) {
544 snd_pcm_uframes_t avail_min;
549 /* Use the full buffer if noone asked us for anything specific */
550 u->hwbuf_unused_frames = 0;
555 if ((latency = pa_sink_get_requested_latency_within_thread(u->sink)) != (pa_usec_t) -1) {
558 pa_log_debug("latency set to %0.2fms", (double) latency / PA_USEC_PER_MSEC);
560 b = pa_usec_to_bytes(latency, &u->sink->sample_spec);
562 /* We need at least one sample in our buffer */
564 if (PA_UNLIKELY(b < u->frame_size))
567 u->hwbuf_unused_frames = (snd_pcm_sframes_t)
568 (PA_LIKELY(b < u->hwbuf_size) ?
569 ((u->hwbuf_size - b) / u->frame_size) : 0);
572 fix_tsched_watermark(u);
575 pa_log_debug("hwbuf_unused_frames=%lu", (unsigned long) u->hwbuf_unused_frames);
577 /* We need at last one frame in the used part of the buffer */
578 avail_min = (snd_pcm_uframes_t) u->hwbuf_unused_frames + 1;
581 pa_usec_t sleep_usec, process_usec;
583 hw_sleep_time(u, &sleep_usec, &process_usec);
584 avail_min += pa_usec_to_bytes(sleep_usec, &u->sink->sample_spec) / u->frame_size;
587 pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min);
589 if ((err = pa_alsa_set_sw_params(u->pcm_handle, avail_min)) < 0) {
590 pa_log("Failed to set software parameters: %s", snd_strerror(err));
594 pa_sink_set_max_request(u->sink, u->hwbuf_size - (size_t) u->hwbuf_unused_frames * u->frame_size);
599 static int unsuspend(struct userdata *u) {
604 snd_pcm_uframes_t period_size;
607 pa_assert(!u->pcm_handle);
609 pa_log_info("Trying resume...");
611 snd_config_update_free_global();
612 if ((err = snd_pcm_open(&u->pcm_handle, u->device_name, SND_PCM_STREAM_PLAYBACK,
613 /*SND_PCM_NONBLOCK|*/
614 SND_PCM_NO_AUTO_RESAMPLE|
615 SND_PCM_NO_AUTO_CHANNELS|
616 SND_PCM_NO_AUTO_FORMAT)) < 0) {
617 pa_log("Error opening PCM device %s: %s", u->device_name, snd_strerror(err));
621 ss = u->sink->sample_spec;
622 nfrags = u->nfragments;
623 period_size = u->fragment_size / u->frame_size;
627 if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, u->hwbuf_size / u->frame_size, &b, &d, TRUE)) < 0) {
628 pa_log("Failed to set hardware parameters: %s", snd_strerror(err));
632 if (b != u->use_mmap || d != u->use_tsched) {
633 pa_log_warn("Resume failed, couldn't get original access mode.");
637 if (!pa_sample_spec_equal(&ss, &u->sink->sample_spec)) {
638 pa_log_warn("Resume failed, couldn't restore original sample settings.");
642 if (nfrags != u->nfragments || period_size*u->frame_size != u->fragment_size) {
643 pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %lu*%lu, New %lu*%lu)",
644 (unsigned long) u->nfragments, (unsigned long) u->fragment_size,
645 (unsigned long) nfrags, period_size * u->frame_size);
649 if (update_sw_params(u) < 0)
652 if (build_pollfd(u) < 0)
655 /* FIXME: We need to reload the volume somehow */
660 pa_log_info("Resumed successfully...");
666 snd_pcm_close(u->pcm_handle);
667 u->pcm_handle = NULL;
673 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
674 struct userdata *u = PA_SINK(o)->userdata;
678 case PA_SINK_MESSAGE_GET_LATENCY: {
682 r = sink_get_latency(u);
684 *((pa_usec_t*) data) = r;
689 case PA_SINK_MESSAGE_SET_STATE:
691 switch ((pa_sink_state_t) PA_PTR_TO_UINT(data)) {
693 case PA_SINK_SUSPENDED:
694 pa_assert(PA_SINK_IS_OPENED(u->sink->thread_info.state));
702 case PA_SINK_RUNNING:
704 if (u->sink->thread_info.state == PA_SINK_INIT) {
705 if (build_pollfd(u) < 0)
709 if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
710 if (unsuspend(u) < 0)
716 case PA_SINK_UNLINKED:
718 case PA_SINK_INVALID_STATE:
725 return pa_sink_process_msg(o, code, data, offset, chunk);
728 static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
729 struct userdata *u = snd_mixer_elem_get_callback_private(elem);
732 pa_assert(u->mixer_handle);
734 if (mask == SND_CTL_EVENT_MASK_REMOVE)
737 if (mask & SND_CTL_EVENT_MASK_VALUE) {
738 pa_sink_get_volume(u->sink, TRUE);
739 pa_sink_get_mute(u->sink, TRUE);
745 static pa_volume_t from_alsa_volume(struct userdata *u, long alsa_vol) {
747 return (pa_volume_t) round(((double) (alsa_vol - u->hw_volume_min) * PA_VOLUME_NORM) /
748 (double) (u->hw_volume_max - u->hw_volume_min));
751 static long to_alsa_volume(struct userdata *u, pa_volume_t vol) {
754 alsa_vol = (long) round(((double) vol * (double) (u->hw_volume_max - u->hw_volume_min))
755 / PA_VOLUME_NORM) + u->hw_volume_min;
757 return PA_CLAMP_UNLIKELY(alsa_vol, u->hw_volume_min, u->hw_volume_max);
760 static int sink_get_volume_cb(pa_sink *s) {
761 struct userdata *u = s->userdata;
765 char t[PA_CVOLUME_SNPRINT_MAX];
768 pa_assert(u->mixer_elem);
770 if (u->mixer_seperate_channels) {
772 r.channels = s->sample_spec.channels;
774 for (i = 0; i < s->sample_spec.channels; i++) {
777 if (u->hw_dB_supported) {
779 if ((err = snd_mixer_selem_get_playback_dB(u->mixer_elem, u->mixer_map[i], &alsa_vol)) < 0)
782 #ifdef HAVE_VALGRIND_MEMCHECK_H
783 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol, sizeof(alsa_vol));
786 r.values[i] = pa_sw_volume_from_dB((double) (alsa_vol - u->hw_dB_max) / 100.0);
789 if ((err = snd_mixer_selem_get_playback_volume(u->mixer_elem, u->mixer_map[i], &alsa_vol)) < 0)
792 r.values[i] = from_alsa_volume(u, alsa_vol);
799 if (u->hw_dB_supported) {
801 if ((err = snd_mixer_selem_get_playback_dB(u->mixer_elem, SND_MIXER_SCHN_MONO, &alsa_vol)) < 0)
804 #ifdef HAVE_VALGRIND_MEMCHECK_H
805 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol, sizeof(alsa_vol));
808 pa_cvolume_set(&r, s->sample_spec.channels, pa_sw_volume_from_dB((double) (alsa_vol - u->hw_dB_max) / 100.0));
812 if ((err = snd_mixer_selem_get_playback_volume(u->mixer_elem, SND_MIXER_SCHN_MONO, &alsa_vol)) < 0)
815 pa_cvolume_set(&r, s->sample_spec.channels, from_alsa_volume(u, alsa_vol));
819 pa_log_debug("Read hardware volume: %s", pa_cvolume_snprint(t, sizeof(t), &r));
821 if (!pa_cvolume_equal(&u->hardware_volume, &r)) {
823 u->hardware_volume = s->volume = r;
825 if (u->hw_dB_supported) {
828 /* Hmm, so the hardware volume changed, let's reset our software volume */
830 pa_cvolume_reset(&reset, s->sample_spec.channels);
831 pa_sink_set_soft_volume(s, &reset);
838 pa_log_error("Unable to read volume: %s", snd_strerror(err));
843 static int sink_set_volume_cb(pa_sink *s) {
844 struct userdata *u = s->userdata;
850 pa_assert(u->mixer_elem);
852 if (u->mixer_seperate_channels) {
854 r.channels = s->sample_spec.channels;
856 for (i = 0; i < s->sample_spec.channels; i++) {
860 vol = s->volume.values[i];
862 if (u->hw_dB_supported) {
864 alsa_vol = (long) (pa_sw_volume_to_dB(vol) * 100);
865 alsa_vol += u->hw_dB_max;
866 alsa_vol = PA_CLAMP_UNLIKELY(alsa_vol, u->hw_dB_min, u->hw_dB_max);
868 if ((err = snd_mixer_selem_set_playback_dB(u->mixer_elem, u->mixer_map[i], alsa_vol, 1)) < 0)
871 if ((err = snd_mixer_selem_get_playback_dB(u->mixer_elem, u->mixer_map[i], &alsa_vol)) < 0)
874 #ifdef HAVE_VALGRIND_MEMCHECK_H
875 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol, sizeof(alsa_vol));
878 r.values[i] = pa_sw_volume_from_dB((double) (alsa_vol - u->hw_dB_max) / 100.0);
881 alsa_vol = to_alsa_volume(u, vol);
883 if ((err = snd_mixer_selem_set_playback_volume(u->mixer_elem, u->mixer_map[i], alsa_vol)) < 0)
886 if ((err = snd_mixer_selem_get_playback_volume(u->mixer_elem, u->mixer_map[i], &alsa_vol)) < 0)
889 r.values[i] = from_alsa_volume(u, alsa_vol);
897 vol = pa_cvolume_max(&s->volume);
899 if (u->hw_dB_supported) {
900 alsa_vol = (long) (pa_sw_volume_to_dB(vol) * 100);
901 alsa_vol += u->hw_dB_max;
902 alsa_vol = PA_CLAMP_UNLIKELY(alsa_vol, u->hw_dB_min, u->hw_dB_max);
904 if ((err = snd_mixer_selem_set_playback_dB_all(u->mixer_elem, alsa_vol, 1)) < 0)
907 if ((err = snd_mixer_selem_get_playback_dB(u->mixer_elem, SND_MIXER_SCHN_MONO, &alsa_vol)) < 0)
910 #ifdef HAVE_VALGRIND_MEMCHECK_H
911 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol, sizeof(alsa_vol));
914 pa_cvolume_set(&r, s->volume.channels, pa_sw_volume_from_dB((double) (alsa_vol - u->hw_dB_max) / 100.0));
917 alsa_vol = to_alsa_volume(u, vol);
919 if ((err = snd_mixer_selem_set_playback_volume_all(u->mixer_elem, alsa_vol)) < 0)
922 if ((err = snd_mixer_selem_get_playback_volume(u->mixer_elem, SND_MIXER_SCHN_MONO, &alsa_vol)) < 0)
925 pa_cvolume_set(&r, s->sample_spec.channels, from_alsa_volume(u, alsa_vol));
929 u->hardware_volume = r;
931 if (u->hw_dB_supported) {
932 char t[PA_CVOLUME_SNPRINT_MAX];
934 /* Match exactly what the user requested by software */
936 pa_sw_cvolume_divide(&r, &s->volume, &r);
937 pa_sink_set_soft_volume(s, &r);
939 pa_log_debug("Requested volume: %s", pa_cvolume_snprint(t, sizeof(t), &s->volume));
940 pa_log_debug("Got hardware volume: %s", pa_cvolume_snprint(t, sizeof(t), &u->hardware_volume));
941 pa_log_debug("Calculated software volume: %s", pa_cvolume_snprint(t, sizeof(t), &r));
945 /* We can't match exactly what the user requested, hence let's
946 * at least tell the user about it */
953 pa_log_error("Unable to set volume: %s", snd_strerror(err));
958 static int sink_get_mute_cb(pa_sink *s) {
959 struct userdata *u = s->userdata;
963 pa_assert(u->mixer_elem);
965 if ((err = snd_mixer_selem_get_playback_switch(u->mixer_elem, 0, &sw)) < 0) {
966 pa_log_error("Unable to get switch: %s", snd_strerror(err));
975 static int sink_set_mute_cb(pa_sink *s) {
976 struct userdata *u = s->userdata;
980 pa_assert(u->mixer_elem);
982 if ((err = snd_mixer_selem_set_playback_switch_all(u->mixer_elem, !s->muted)) < 0) {
983 pa_log_error("Unable to set switch: %s", snd_strerror(err));
990 static void sink_update_requested_latency_cb(pa_sink *s) {
991 struct userdata *u = s->userdata;
992 snd_pcm_sframes_t before;
998 before = u->hwbuf_unused_frames;
1001 /* Let's check whether we now use only a smaller part of the
1002 buffer then before. If so, we need to make sure that subsequent
1003 rewinds are relative to the new maxium fill level and not to the
1004 current fill level. Thus, let's do a full rewind once, to clear
1007 if (u->hwbuf_unused_frames > before) {
1008 pa_log_debug("Requesting rewind due to latency change.");
1009 pa_sink_request_rewind(s, (size_t) -1);
1013 static int process_rewind(struct userdata *u) {
1014 snd_pcm_sframes_t unused;
1015 size_t rewind_nbytes, unused_nbytes, limit_nbytes;
1018 /* Figure out how much we shall rewind and reset the counter */
1019 rewind_nbytes = u->sink->thread_info.rewind_nbytes;
1020 u->sink->thread_info.rewind_nbytes = 0;
1022 if (rewind_nbytes <= 0)
1025 pa_assert(rewind_nbytes > 0);
1026 pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes);
1028 snd_pcm_hwsync(u->pcm_handle);
1029 if ((unused = snd_pcm_avail_update(u->pcm_handle)) < 0) {
1030 pa_log("snd_pcm_avail_update() failed: %s", snd_strerror((int) unused));
1034 unused_nbytes = u->tsched_watermark + (size_t) unused * u->frame_size;
1036 if (u->hwbuf_size > unused_nbytes)
1037 limit_nbytes = u->hwbuf_size - unused_nbytes;
1041 if (rewind_nbytes > limit_nbytes)
1042 rewind_nbytes = limit_nbytes;
1044 if (rewind_nbytes > 0) {
1045 snd_pcm_sframes_t in_frames, out_frames;
1047 pa_log_debug("Limited to %lu bytes.", (unsigned long) rewind_nbytes);
1049 in_frames = (snd_pcm_sframes_t) (rewind_nbytes / u->frame_size);
1050 pa_log_debug("before: %lu", (unsigned long) in_frames);
1051 if ((out_frames = snd_pcm_rewind(u->pcm_handle, (snd_pcm_uframes_t) in_frames)) < 0) {
1052 pa_log("snd_pcm_rewind() failed: %s", snd_strerror((int) out_frames));
1055 pa_log_debug("after: %lu", (unsigned long) out_frames);
1057 rewind_nbytes = (size_t) out_frames * u->frame_size;
1059 if (rewind_nbytes <= 0)
1060 pa_log_info("Tried rewind, but was apparently not possible.");
1062 u->frame_index -= out_frames;
1063 pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
1064 pa_sink_process_rewind(u->sink, rewind_nbytes);
1066 u->after_rewind = TRUE;
1070 pa_log_debug("Mhmm, actually there is nothing to rewind.");
1074 pa_sink_process_rewind(u->sink, 0);
1080 static void thread_func(void *userdata) {
1081 struct userdata *u = userdata;
1082 unsigned short revents = 0;
1086 pa_log_debug("Thread starting up");
1088 if (u->core->realtime_scheduling)
1089 pa_make_realtime(u->core->realtime_priority);
1091 pa_thread_mq_install(&u->thread_mq);
1092 pa_rtpoll_install(u->rtpoll);
1097 /* pa_log_debug("loop"); */
1099 /* Render some data and write it to the dsp */
1100 if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
1102 pa_usec_t sleep_usec = 0;
1104 if (u->sink->thread_info.rewind_requested)
1105 if (process_rewind(u) < 0)
1109 work_done = mmap_write(u, &sleep_usec, revents & POLLOUT);
1111 work_done = unix_write(u, &sleep_usec, revents & POLLOUT);
1116 /* pa_log_debug("work_done = %i", work_done); */
1121 pa_log_info("Starting playback.");
1122 snd_pcm_start(u->pcm_handle);
1124 pa_smoother_resume(u->smoother, pa_rtclock_usec());
1130 if (u->use_tsched) {
1133 if (u->since_start <= u->hwbuf_size) {
1135 /* USB devices on ALSA seem to hit a buffer
1136 * underrun during the first iterations much
1137 * quicker then we calculate here, probably due to
1138 * the transport latency. To accomodate for that
1139 * we artificially decrease the sleep time until
1140 * we have filled the buffer at least once
1143 /*pa_log_debug("Cutting sleep time for the initial iterations by half.");*/
1147 /* OK, the playback buffer is now full, let's
1148 * calculate when to wake up next */
1149 /* pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) sleep_usec / PA_USEC_PER_MSEC); */
1151 /* Convert from the sound card time domain to the
1152 * system time domain */
1153 cusec = pa_smoother_translate(u->smoother, pa_rtclock_usec(), sleep_usec);
1155 /* pa_log_debug("Waking up in %0.2fms (system clock).", (double) cusec / PA_USEC_PER_MSEC); */
1157 /* We don't trust the conversion, so we wake up whatever comes first */
1158 pa_rtpoll_set_timer_relative(u->rtpoll, PA_MIN(sleep_usec, cusec));
1162 u->after_rewind = FALSE;
1164 } else if (u->use_tsched)
1166 /* OK, we're in an invalid state, let's disable our timers */
1167 pa_rtpoll_set_timer_disabled(u->rtpoll);
1169 /* Hmm, nothing to do. Let's sleep */
1170 if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
1176 /* Tell ALSA about this and process its response */
1177 if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
1178 struct pollfd *pollfd;
1182 pollfd = pa_rtpoll_item_get_pollfd(u->alsa_rtpoll_item, &n);
1184 if ((err = snd_pcm_poll_descriptors_revents(u->pcm_handle, pollfd, n, &revents)) < 0) {
1185 pa_log("snd_pcm_poll_descriptors_revents() failed: %s", snd_strerror(err));
1189 if (revents & (POLLIN|POLLERR|POLLNVAL|POLLHUP|POLLPRI)) {
1190 if (pa_alsa_recover_from_poll(u->pcm_handle, revents) < 0)
1197 if (revents && u->use_tsched && pa_log_ratelimit())
1198 pa_log_debug("Wakeup from ALSA!%s%s", (revents & POLLIN) ? " INPUT" : "", (revents & POLLOUT) ? " OUTPUT" : "");
1204 /* If this was no regular exit from the loop we have to continue
1205 * processing messages until we received PA_MESSAGE_SHUTDOWN */
1206 pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
1207 pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
1210 pa_log_debug("Thread shutting down");
1213 static void set_sink_name(pa_sink_new_data *data, pa_modargs *ma, const char *device_id, const char *device_name) {
1219 pa_assert(device_name);
1221 if ((n = pa_modargs_get_value(ma, "sink_name", NULL))) {
1222 pa_sink_new_data_set_name(data, n);
1223 data->namereg_fail = TRUE;
1227 if ((n = pa_modargs_get_value(ma, "name", NULL)))
1228 data->namereg_fail = TRUE;
1230 n = device_id ? device_id : device_name;
1231 data->namereg_fail = FALSE;
1234 t = pa_sprintf_malloc("alsa_output.%s", n);
1235 pa_sink_new_data_set_name(data, t);
1239 pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_card *card, const pa_alsa_profile_info *profile) {
1241 struct userdata *u = NULL;
1242 const char *dev_id = NULL;
1245 uint32_t nfrags, hwbuf_size, frag_size, tsched_size, tsched_watermark;
1246 snd_pcm_uframes_t period_frames, tsched_frames;
1248 snd_pcm_info_t *pcm_info = NULL;
1250 pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d;
1252 pa_sink_new_data data;
1254 snd_pcm_info_alloca(&pcm_info);
1259 ss = m->core->default_sample_spec;
1260 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_ALSA) < 0) {
1261 pa_log("Failed to parse sample specification and channel map");
1265 frame_size = pa_frame_size(&ss);
1267 nfrags = m->core->default_n_fragments;
1268 frag_size = (uint32_t) pa_usec_to_bytes(m->core->default_fragment_size_msec*PA_USEC_PER_MSEC, &ss);
1270 frag_size = (uint32_t) frame_size;
1271 tsched_size = (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC, &ss);
1272 tsched_watermark = (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_WATERMARK_USEC, &ss);
1274 if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 ||
1275 pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0 ||
1276 pa_modargs_get_value_u32(ma, "tsched_buffer_size", &tsched_size) < 0 ||
1277 pa_modargs_get_value_u32(ma, "tsched_buffer_watermark", &tsched_watermark) < 0) {
1278 pa_log("Failed to parse buffer metrics");
1282 hwbuf_size = frag_size * nfrags;
1283 period_frames = frag_size/frame_size;
1284 tsched_frames = tsched_size/frame_size;
1286 if (pa_modargs_get_value_boolean(ma, "mmap", &use_mmap) < 0) {
1287 pa_log("Failed to parse mmap argument.");
1291 if (pa_modargs_get_value_boolean(ma, "tsched", &use_tsched) < 0) {
1292 pa_log("Failed to parse tsched argument.");
1296 if (use_tsched && !pa_rtclock_hrtimer()) {
1297 pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
1301 u = pa_xnew0(struct userdata, 1);
1304 u->use_mmap = use_mmap;
1305 u->use_tsched = use_tsched;
1308 u->after_rewind = FALSE;
1309 u->rtpoll = pa_rtpoll_new();
1310 pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
1311 u->alsa_rtpoll_item = NULL;
1313 u->smoother = pa_smoother_new(DEFAULT_TSCHED_BUFFER_USEC*2, DEFAULT_TSCHED_BUFFER_USEC*2, TRUE, 5);
1314 usec = pa_rtclock_usec();
1315 pa_smoother_set_time_offset(u->smoother, usec);
1316 pa_smoother_pause(u->smoother, usec);
1323 if (!(dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
1324 pa_log("device_id= not set");
1328 if (!(u->pcm_handle = pa_alsa_open_by_device_id_profile(
1332 SND_PCM_STREAM_PLAYBACK,
1333 &nfrags, &period_frames, tsched_frames,
1338 } else if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
1340 if (!(u->pcm_handle = pa_alsa_open_by_device_id_auto(
1344 SND_PCM_STREAM_PLAYBACK,
1345 &nfrags, &period_frames, tsched_frames,
1352 if (!(u->pcm_handle = pa_alsa_open_by_device_string(
1353 pa_modargs_get_value(ma, "device", DEFAULT_DEVICE),
1356 SND_PCM_STREAM_PLAYBACK,
1357 &nfrags, &period_frames, tsched_frames,
1363 pa_assert(u->device_name);
1364 pa_log_info("Successfully opened device %s.", u->device_name);
1367 pa_log_info("Selected configuration '%s' (%s).", profile->description, profile->name);
1369 if (use_mmap && !b) {
1370 pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode.");
1371 u->use_mmap = use_mmap = FALSE;
1374 if (use_tsched && (!b || !d)) {
1375 pa_log_info("Cannot enabled timer-based scheduling, falling back to sound IRQ scheduling.");
1376 u->use_tsched = use_tsched = FALSE;
1380 pa_log_info("Successfully enabled mmap() mode.");
1383 pa_log_info("Successfully enabled timer-based scheduling mode.");
1385 if ((err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) {
1386 pa_log("Error fetching PCM info: %s", snd_strerror(err));
1390 /* ALSA might tweak the sample spec, so recalculate the frame size */
1391 frame_size = pa_frame_size(&ss);
1393 if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0)
1394 pa_log_warn("Error opening mixer: %s", snd_strerror(err));
1396 pa_bool_t found = FALSE;
1398 if (pa_alsa_prepare_mixer(u->mixer_handle, u->device_name) >= 0)
1401 snd_pcm_info_t *info;
1403 snd_pcm_info_alloca(&info);
1405 if (snd_pcm_info(u->pcm_handle, info) >= 0) {
1409 if ((card_idx = snd_pcm_info_get_card(info)) >= 0) {
1411 md = pa_sprintf_malloc("hw:%i", card_idx);
1413 if (strcmp(u->device_name, md))
1414 if (pa_alsa_prepare_mixer(u->mixer_handle, md) >= 0)
1422 if (!(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Master", "PCM", TRUE)))
1426 snd_mixer_close(u->mixer_handle);
1427 u->mixer_handle = NULL;
1431 pa_sink_new_data_init(&data);
1432 data.driver = driver;
1435 set_sink_name(&data, ma, dev_id, u->device_name);
1436 pa_sink_new_data_set_sample_spec(&data, &ss);
1437 pa_sink_new_data_set_channel_map(&data, &map);
1439 pa_alsa_init_proplist_pcm(data.proplist, pcm_info);
1440 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
1441 pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) (period_frames * frame_size * nfrags));
1442 pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE, "%lu", (unsigned long) (period_frames * frame_size));
1443 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_ACCESS_MODE, u->use_tsched ? "mmap+timer" : (u->use_mmap ? "mmap" : "serial"));
1446 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_PROFILE_NAME, profile->name);
1447 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_PROFILE_DESCRIPTION, profile->description);
1450 u->sink = pa_sink_new(m->core, &data, PA_SINK_HARDWARE|PA_SINK_LATENCY);
1451 pa_sink_new_data_done(&data);
1454 pa_log("Failed to create sink object");
1458 u->sink->parent.process_msg = sink_process_msg;
1459 u->sink->update_requested_latency = sink_update_requested_latency_cb;
1460 u->sink->userdata = u;
1462 pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
1463 pa_sink_set_rtpoll(u->sink, u->rtpoll);
1465 u->frame_size = frame_size;
1466 u->fragment_size = frag_size = (uint32_t) (period_frames * frame_size);
1467 u->nfragments = nfrags;
1468 u->hwbuf_size = u->fragment_size * nfrags;
1469 u->hwbuf_unused_frames = 0;
1470 u->tsched_watermark = tsched_watermark;
1472 u->hw_dB_supported = FALSE;
1473 u->hw_dB_min = u->hw_dB_max = 0;
1474 u->hw_volume_min = u->hw_volume_max = 0;
1475 u->mixer_seperate_channels = FALSE;
1476 pa_cvolume_mute(&u->hardware_volume, u->sink->sample_spec.channels);
1479 fix_tsched_watermark(u);
1481 u->sink->thread_info.max_rewind = use_tsched ? u->hwbuf_size : 0;
1482 u->sink->thread_info.max_request = u->hwbuf_size;
1484 pa_sink_set_latency_range(u->sink,
1485 !use_tsched ? pa_bytes_to_usec(u->hwbuf_size, &ss) : (pa_usec_t) -1,
1486 pa_bytes_to_usec(u->hwbuf_size, &ss));
1488 pa_log_info("Using %u fragments of size %lu bytes, buffer time is %0.2fms",
1489 nfrags, (long unsigned) u->fragment_size,
1490 (double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC);
1493 pa_log_info("Time scheduling watermark is %0.2fms",
1494 (double) pa_bytes_to_usec(u->tsched_watermark, &ss) / PA_USEC_PER_MSEC);
1496 if (update_sw_params(u) < 0)
1499 pa_memchunk_reset(&u->memchunk);
1501 if (u->mixer_handle) {
1502 pa_assert(u->mixer_elem);
1504 if (snd_mixer_selem_has_playback_volume(u->mixer_elem)) {
1505 pa_bool_t suitable = FALSE;
1507 if (snd_mixer_selem_get_playback_volume_range(u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max) < 0)
1508 pa_log_info("Failed to get volume range. Falling back to software volume control.");
1509 else if (u->hw_volume_min >= u->hw_volume_max)
1510 pa_log_warn("Your kernel driver is broken: it reports a volume range from %li to %li which makes no sense.", u->hw_volume_min, u->hw_volume_max);
1512 pa_log_info("Volume ranges from %li to %li.", u->hw_volume_min, u->hw_volume_max);
1517 if (snd_mixer_selem_get_playback_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) < 0)
1518 pa_log_info("Mixer doesn't support dB information.");
1520 #ifdef HAVE_VALGRIND_MEMCHECK_H
1521 VALGRIND_MAKE_MEM_DEFINED(&u->hw_dB_min, sizeof(u->hw_dB_min));
1522 VALGRIND_MAKE_MEM_DEFINED(&u->hw_dB_max, sizeof(u->hw_dB_max));
1525 if (u->hw_dB_min >= u->hw_dB_max)
1526 pa_log_warn("Your kernel driver is broken: it reports a volume range from %0.2f dB to %0.2f dB which makes no sense.", (double) u->hw_dB_min/100.0, (double) u->hw_dB_max/100.0);
1528 pa_log_info("Volume ranges from %0.2f dB to %0.2f dB.", (double) u->hw_dB_min/100.0, (double) u->hw_dB_max/100.0);
1529 u->hw_dB_supported = TRUE;
1531 if (u->hw_dB_max > 0) {
1532 u->sink->base_volume = pa_sw_volume_from_dB(- (double) u->hw_dB_max/100.0);
1533 pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(u->sink->base_volume));
1535 pa_log_info("No particular base volume set, fixing to 0 dB");
1539 if (!u->hw_dB_supported &&
1540 u->hw_volume_max - u->hw_volume_min < 3) {
1542 pa_log_info("Device doesn't do dB volume and has less than 4 volume levels. Falling back to software volume control.");
1548 u->mixer_seperate_channels = pa_alsa_calc_mixer_map(u->mixer_elem, &map, u->mixer_map, TRUE) >= 0;
1550 u->sink->get_volume = sink_get_volume_cb;
1551 u->sink->set_volume = sink_set_volume_cb;
1552 u->sink->flags |= PA_SINK_HW_VOLUME_CTRL | (u->hw_dB_supported ? PA_SINK_DECIBEL_VOLUME : 0);
1553 pa_log_info("Using hardware volume control. Hardware dB scale %s.", u->hw_dB_supported ? "supported" : "not supported");
1556 pa_log_info("Using software volume control.");
1559 if (snd_mixer_selem_has_playback_switch(u->mixer_elem)) {
1560 u->sink->get_mute = sink_get_mute_cb;
1561 u->sink->set_mute = sink_set_mute_cb;
1562 u->sink->flags |= PA_SINK_HW_MUTE_CTRL;
1564 pa_log_info("Using software mute control.");
1566 u->mixer_fdl = pa_alsa_fdlist_new();
1568 if (pa_alsa_fdlist_set_mixer(u->mixer_fdl, u->mixer_handle, m->core->mainloop) < 0) {
1569 pa_log("Failed to initialize file descriptor monitoring");
1573 snd_mixer_elem_set_callback(u->mixer_elem, mixer_callback);
1574 snd_mixer_elem_set_callback_private(u->mixer_elem, u);
1576 u->mixer_fdl = NULL;
1578 pa_alsa_dump(u->pcm_handle);
1580 if (!(u->thread = pa_thread_new(thread_func, u))) {
1581 pa_log("Failed to create thread.");
1585 /* Get initial mixer settings */
1586 if (data.volume_is_set) {
1587 if (u->sink->set_volume)
1588 u->sink->set_volume(u->sink);
1590 if (u->sink->get_volume)
1591 u->sink->get_volume(u->sink);
1594 if (data.muted_is_set) {
1595 if (u->sink->set_mute)
1596 u->sink->set_mute(u->sink);
1598 if (u->sink->get_mute)
1599 u->sink->get_mute(u->sink);
1602 pa_sink_put(u->sink);
1613 static void userdata_free(struct userdata *u) {
1617 pa_sink_unlink(u->sink);
1620 pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
1621 pa_thread_free(u->thread);
1624 pa_thread_mq_done(&u->thread_mq);
1627 pa_sink_unref(u->sink);
1629 if (u->memchunk.memblock)
1630 pa_memblock_unref(u->memchunk.memblock);
1632 if (u->alsa_rtpoll_item)
1633 pa_rtpoll_item_free(u->alsa_rtpoll_item);
1636 pa_rtpoll_free(u->rtpoll);
1639 pa_alsa_fdlist_free(u->mixer_fdl);
1641 if (u->mixer_handle)
1642 snd_mixer_close(u->mixer_handle);
1644 if (u->pcm_handle) {
1645 snd_pcm_drop(u->pcm_handle);
1646 snd_pcm_close(u->pcm_handle);
1650 pa_smoother_free(u->smoother);
1652 pa_xfree(u->device_name);
1656 void pa_alsa_sink_free(pa_sink *s) {
1659 pa_sink_assert_ref(s);
1660 pa_assert_se(u = s->userdata);