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 2.1 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/i18n.h>
36 #include <pulse/rtclock.h>
37 #include <pulse/timeval.h>
38 #include <pulse/util.h>
39 #include <pulse/xmalloc.h>
41 #include <pulsecore/core.h>
42 #include <pulsecore/module.h>
43 #include <pulsecore/memchunk.h>
44 #include <pulsecore/sink.h>
45 #include <pulsecore/modargs.h>
46 #include <pulsecore/core-rtclock.h>
47 #include <pulsecore/core-util.h>
48 #include <pulsecore/sample-util.h>
49 #include <pulsecore/log.h>
50 #include <pulsecore/macro.h>
51 #include <pulsecore/thread.h>
52 #include <pulsecore/core-error.h>
53 #include <pulsecore/thread-mq.h>
54 #include <pulsecore/rtpoll.h>
55 #include <pulsecore/time-smoother.h>
57 #include <modules/reserve-wrap.h>
59 #include "alsa-util.h"
60 #include "alsa-sink.h"
62 /* #define DEBUG_TIMING */
64 #define DEFAULT_DEVICE "default"
66 #define DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s -- Overall buffer size */
67 #define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms -- Fill up when only this much is left in the buffer */
69 #define TSCHED_WATERMARK_INC_STEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms -- On underrun, increase watermark by this */
70 #define TSCHED_WATERMARK_DEC_STEP_USEC (5*PA_USEC_PER_MSEC) /* 5ms -- When everything's great, decrease watermark by this */
71 #define TSCHED_WATERMARK_VERIFY_AFTER_USEC (20*PA_USEC_PER_SEC) /* 20s -- How long after a drop out recheck if things are good now */
72 #define TSCHED_WATERMARK_INC_THRESHOLD_USEC (0*PA_USEC_PER_MSEC) /* 0ms -- If the buffer level ever below this theshold, increase the watermark */
73 #define TSCHED_WATERMARK_DEC_THRESHOLD_USEC (100*PA_USEC_PER_MSEC) /* 100ms -- If the buffer level didn't drop below this theshold in the verification time, decrease the watermark */
75 /* Note that TSCHED_WATERMARK_INC_THRESHOLD_USEC == 0 means tht we
76 * will increase the watermark only if we hit a real underrun. */
78 #define TSCHED_MIN_SLEEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms -- Sleep at least 10ms on each iteration */
79 #define TSCHED_MIN_WAKEUP_USEC (4*PA_USEC_PER_MSEC) /* 4ms -- Wakeup at least this long before the buffer runs empty*/
81 #define SMOOTHER_WINDOW_USEC (10*PA_USEC_PER_SEC) /* 10s -- smoother windows size */
82 #define SMOOTHER_ADJUST_USEC (1*PA_USEC_PER_SEC) /* 1s -- smoother adjust time */
84 #define SMOOTHER_MIN_INTERVAL (2*PA_USEC_PER_MSEC) /* 2ms -- min smoother update interval */
85 #define SMOOTHER_MAX_INTERVAL (200*PA_USEC_PER_MSEC) /* 200ms -- max smoother update interval */
87 #define VOLUME_ACCURACY (PA_VOLUME_NORM/100) /* don't require volume adjustments to be perfectly correct. don't necessarily extend granularity in software unless the differences get greater than this level */
89 #define DEFAULT_REWIND_SAFEGUARD_BYTES (256U) /* 1.33ms @48kHz, we'll never rewind less than this */
90 #define DEFAULT_REWIND_SAFEGUARD_USEC (1330) /* 1.33ms, depending on channels/rate/sample we may rewind more than 256 above */
98 pa_thread_mq thread_mq;
101 snd_pcm_t *pcm_handle;
103 pa_alsa_fdlist *mixer_fdl;
104 pa_alsa_mixer_pdata *mixer_pd;
105 snd_mixer_t *mixer_handle;
106 pa_alsa_path_set *mixer_path_set;
107 pa_alsa_path *mixer_path;
109 pa_cvolume hardware_volume;
121 watermark_inc_threshold,
122 watermark_dec_threshold,
125 pa_usec_t watermark_dec_not_before;
127 pa_memchunk memchunk;
129 char *device_name; /* name of the PCM device */
130 char *control_device; /* name of the control device */
132 pa_bool_t use_mmap:1, use_tsched:1;
134 pa_bool_t first, after_rewind;
136 pa_rtpoll_item *alsa_rtpoll_item;
138 snd_mixer_selem_channel_id_t mixer_map[SND_MIXER_SCHN_LAST];
140 pa_smoother *smoother;
141 uint64_t write_count;
142 uint64_t since_start;
143 pa_usec_t smoother_interval;
144 pa_usec_t last_smoother_update;
146 pa_reserve_wrapper *reserve;
147 pa_hook_slot *reserve_slot;
148 pa_reserve_monitor_wrapper *monitor;
149 pa_hook_slot *monitor_slot;
152 static void userdata_free(struct userdata *u);
154 static pa_hook_result_t reserve_cb(pa_reserve_wrapper *r, void *forced, struct userdata *u) {
158 if (pa_sink_suspend(u->sink, TRUE, PA_SUSPEND_APPLICATION) < 0)
159 return PA_HOOK_CANCEL;
164 static void reserve_done(struct userdata *u) {
167 if (u->reserve_slot) {
168 pa_hook_slot_free(u->reserve_slot);
169 u->reserve_slot = NULL;
173 pa_reserve_wrapper_unref(u->reserve);
178 static void reserve_update(struct userdata *u) {
179 const char *description;
182 if (!u->sink || !u->reserve)
185 if ((description = pa_proplist_gets(u->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)))
186 pa_reserve_wrapper_set_application_device_name(u->reserve, description);
189 static int reserve_init(struct userdata *u, const char *dname) {
198 if (pa_in_system_mode())
201 if (!(rname = pa_alsa_get_reserve_name(dname)))
204 /* We are resuming, try to lock the device */
205 u->reserve = pa_reserve_wrapper_get(u->core, rname);
213 pa_assert(!u->reserve_slot);
214 u->reserve_slot = pa_hook_connect(pa_reserve_wrapper_hook(u->reserve), PA_HOOK_NORMAL, (pa_hook_cb_t) reserve_cb, u);
219 static pa_hook_result_t monitor_cb(pa_reserve_monitor_wrapper *w, void* busy, struct userdata *u) {
225 b = PA_PTR_TO_UINT(busy) && !u->reserve;
227 pa_sink_suspend(u->sink, b, PA_SUSPEND_APPLICATION);
231 static void monitor_done(struct userdata *u) {
234 if (u->monitor_slot) {
235 pa_hook_slot_free(u->monitor_slot);
236 u->monitor_slot = NULL;
240 pa_reserve_monitor_wrapper_unref(u->monitor);
245 static int reserve_monitor_init(struct userdata *u, const char *dname) {
251 if (pa_in_system_mode())
254 if (!(rname = pa_alsa_get_reserve_name(dname)))
257 u->monitor = pa_reserve_monitor_wrapper_get(u->core, rname);
263 pa_assert(!u->monitor_slot);
264 u->monitor_slot = pa_hook_connect(pa_reserve_monitor_wrapper_hook(u->monitor), PA_HOOK_NORMAL, (pa_hook_cb_t) monitor_cb, u);
269 static void fix_min_sleep_wakeup(struct userdata *u) {
270 size_t max_use, max_use_2;
273 pa_assert(u->use_tsched);
275 max_use = u->hwbuf_size - u->hwbuf_unused;
276 max_use_2 = pa_frame_align(max_use/2, &u->sink->sample_spec);
278 u->min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->sink->sample_spec);
279 u->min_sleep = PA_CLAMP(u->min_sleep, u->frame_size, max_use_2);
281 u->min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->sink->sample_spec);
282 u->min_wakeup = PA_CLAMP(u->min_wakeup, u->frame_size, max_use_2);
285 static void fix_tsched_watermark(struct userdata *u) {
288 pa_assert(u->use_tsched);
290 max_use = u->hwbuf_size - u->hwbuf_unused;
292 if (u->tsched_watermark > max_use - u->min_sleep)
293 u->tsched_watermark = max_use - u->min_sleep;
295 if (u->tsched_watermark < u->min_wakeup)
296 u->tsched_watermark = u->min_wakeup;
299 static void increase_watermark(struct userdata *u) {
300 size_t old_watermark;
301 pa_usec_t old_min_latency, new_min_latency;
304 pa_assert(u->use_tsched);
306 /* First, just try to increase the watermark */
307 old_watermark = u->tsched_watermark;
308 u->tsched_watermark = PA_MIN(u->tsched_watermark * 2, u->tsched_watermark + u->watermark_inc_step);
309 fix_tsched_watermark(u);
311 if (old_watermark != u->tsched_watermark) {
312 pa_log_info("Increasing wakeup watermark to %0.2f ms",
313 (double) pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec) / PA_USEC_PER_MSEC);
317 /* Hmm, we cannot increase the watermark any further, hence let's raise the latency */
318 old_min_latency = u->sink->thread_info.min_latency;
319 new_min_latency = PA_MIN(old_min_latency * 2, old_min_latency + TSCHED_WATERMARK_INC_STEP_USEC);
320 new_min_latency = PA_MIN(new_min_latency, u->sink->thread_info.max_latency);
322 if (old_min_latency != new_min_latency) {
323 pa_log_info("Increasing minimal latency to %0.2f ms",
324 (double) new_min_latency / PA_USEC_PER_MSEC);
326 pa_sink_set_latency_range_within_thread(u->sink, new_min_latency, u->sink->thread_info.max_latency);
329 /* When we reach this we're officialy fucked! */
332 static void decrease_watermark(struct userdata *u) {
333 size_t old_watermark;
337 pa_assert(u->use_tsched);
339 now = pa_rtclock_now();
341 if (u->watermark_dec_not_before <= 0)
344 if (u->watermark_dec_not_before > now)
347 old_watermark = u->tsched_watermark;
349 if (u->tsched_watermark < u->watermark_dec_step)
350 u->tsched_watermark = u->tsched_watermark / 2;
352 u->tsched_watermark = PA_MAX(u->tsched_watermark / 2, u->tsched_watermark - u->watermark_dec_step);
354 fix_tsched_watermark(u);
356 if (old_watermark != u->tsched_watermark)
357 pa_log_info("Decreasing wakeup watermark to %0.2f ms",
358 (double) pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec) / PA_USEC_PER_MSEC);
360 /* We don't change the latency range*/
363 u->watermark_dec_not_before = now + TSCHED_WATERMARK_VERIFY_AFTER_USEC;
366 static void hw_sleep_time(struct userdata *u, pa_usec_t *sleep_usec, pa_usec_t*process_usec) {
369 pa_assert(sleep_usec);
370 pa_assert(process_usec);
373 pa_assert(u->use_tsched);
375 usec = pa_sink_get_requested_latency_within_thread(u->sink);
377 if (usec == (pa_usec_t) -1)
378 usec = pa_bytes_to_usec(u->hwbuf_size, &u->sink->sample_spec);
380 wm = pa_bytes_to_usec(u->tsched_watermark, &u->sink->sample_spec);
385 *sleep_usec = usec - wm;
389 pa_log_debug("Buffer time: %lu ms; Sleep time: %lu ms; Process time: %lu ms",
390 (unsigned long) (usec / PA_USEC_PER_MSEC),
391 (unsigned long) (*sleep_usec / PA_USEC_PER_MSEC),
392 (unsigned long) (*process_usec / PA_USEC_PER_MSEC));
396 static int try_recover(struct userdata *u, const char *call, int err) {
401 pa_log_debug("%s: %s", call, pa_alsa_strerror(err));
403 pa_assert(err != -EAGAIN);
406 pa_log_debug("%s: Buffer underrun!", call);
408 if (err == -ESTRPIPE)
409 pa_log_debug("%s: System suspended!", call);
411 if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) < 0) {
412 pa_log("%s: %s", call, pa_alsa_strerror(err));
421 static size_t check_left_to_play(struct userdata *u, size_t n_bytes, pa_bool_t on_timeout) {
423 pa_bool_t underrun = FALSE;
425 /* We use <= instead of < for this check here because an underrun
426 * only happens after the last sample was processed, not already when
427 * it is removed from the buffer. This is particularly important
428 * when block transfer is used. */
430 if (n_bytes <= u->hwbuf_size)
431 left_to_play = u->hwbuf_size - n_bytes;
434 /* We got a dropout. What a mess! */
442 if (!u->first && !u->after_rewind)
443 if (pa_log_ratelimit())
444 pa_log_info("Underrun!");
448 pa_log_debug("%0.2f ms left to play; inc threshold = %0.2f ms; dec threshold = %0.2f ms",
449 (double) pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) / PA_USEC_PER_MSEC,
450 (double) pa_bytes_to_usec(u->watermark_inc_threshold, &u->sink->sample_spec) / PA_USEC_PER_MSEC,
451 (double) pa_bytes_to_usec(u->watermark_dec_threshold, &u->sink->sample_spec) / PA_USEC_PER_MSEC);
455 pa_bool_t reset_not_before = TRUE;
457 if (!u->first && !u->after_rewind) {
458 if (underrun || left_to_play < u->watermark_inc_threshold)
459 increase_watermark(u);
460 else if (left_to_play > u->watermark_dec_threshold) {
461 reset_not_before = FALSE;
463 /* We decrease the watermark only if have actually
464 * been woken up by a timeout. If something else woke
465 * us up it's too easy to fulfill the deadlines... */
468 decrease_watermark(u);
472 if (reset_not_before)
473 u->watermark_dec_not_before = 0;
479 static int mmap_write(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled, pa_bool_t on_timeout) {
480 pa_bool_t work_done = TRUE;
481 pa_usec_t max_sleep_usec = 0, process_usec = 0;
486 pa_sink_assert_ref(u->sink);
489 hw_sleep_time(u, &max_sleep_usec, &process_usec);
495 pa_bool_t after_avail = TRUE;
497 /* First we determine how many samples are missing to fill the
498 * buffer up to 100% */
500 if (PA_UNLIKELY((n = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
502 if ((r = try_recover(u, "snd_pcm_avail", (int) n)) == 0)
508 n_bytes = (size_t) n * u->frame_size;
511 pa_log_debug("avail: %lu", (unsigned long) n_bytes);
514 left_to_play = check_left_to_play(u, n_bytes, on_timeout);
519 /* We won't fill up the playback buffer before at least
520 * half the sleep time is over because otherwise we might
521 * ask for more data from the clients then they expect. We
522 * need to guarantee that clients only have to keep around
523 * a single hw buffer length. */
526 pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) > process_usec+max_sleep_usec/2) {
528 pa_log_debug("Not filling up, because too early.");
533 if (PA_UNLIKELY(n_bytes <= u->hwbuf_unused)) {
537 char *dn = pa_alsa_get_driver_name_by_pcm(u->pcm_handle);
538 pa_log(_("ALSA woke us up to write new data to the device, but there was actually nothing to write!\n"
539 "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.\n"
540 "We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail."),
546 pa_log_debug("Not filling up, because not necessary.");
554 pa_log_debug("Not filling up, because already too many iterations.");
560 n_bytes -= u->hwbuf_unused;
564 pa_log_debug("Filling up");
571 const snd_pcm_channel_area_t *areas;
572 snd_pcm_uframes_t offset, frames;
573 snd_pcm_sframes_t sframes;
575 frames = (snd_pcm_uframes_t) (n_bytes / u->frame_size);
576 /* pa_log_debug("%lu frames to write", (unsigned long) frames); */
578 if (PA_UNLIKELY((err = pa_alsa_safe_mmap_begin(u->pcm_handle, &areas, &offset, &frames, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
580 if (!after_avail && err == -EAGAIN)
583 if ((r = try_recover(u, "snd_pcm_mmap_begin", err)) == 0)
589 /* Make sure that if these memblocks need to be copied they will fit into one slot */
590 if (frames > pa_mempool_block_size_max(u->sink->core->mempool)/u->frame_size)
591 frames = pa_mempool_block_size_max(u->sink->core->mempool)/u->frame_size;
593 if (!after_avail && frames == 0)
596 pa_assert(frames > 0);
599 /* Check these are multiples of 8 bit */
600 pa_assert((areas[0].first & 7) == 0);
601 pa_assert((areas[0].step & 7)== 0);
603 /* We assume a single interleaved memory buffer */
604 pa_assert((areas[0].first >> 3) == 0);
605 pa_assert((areas[0].step >> 3) == u->frame_size);
607 p = (uint8_t*) areas[0].addr + (offset * u->frame_size);
609 chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, TRUE);
610 chunk.length = pa_memblock_get_length(chunk.memblock);
613 pa_sink_render_into_full(u->sink, &chunk);
614 pa_memblock_unref_fixed(chunk.memblock);
616 if (PA_UNLIKELY((sframes = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0)) {
618 if (!after_avail && (int) sframes == -EAGAIN)
621 if ((r = try_recover(u, "snd_pcm_mmap_commit", (int) sframes)) == 0)
629 u->write_count += frames * u->frame_size;
630 u->since_start += frames * u->frame_size;
633 pa_log_debug("Wrote %lu bytes (of possible %lu bytes)", (unsigned long) (frames * u->frame_size), (unsigned long) n_bytes);
636 if ((size_t) frames * u->frame_size >= n_bytes)
639 n_bytes -= (size_t) frames * u->frame_size;
644 *sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec);
646 if (*sleep_usec > process_usec)
647 *sleep_usec -= process_usec;
653 return work_done ? 1 : 0;
656 static int unix_write(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled, pa_bool_t on_timeout) {
657 pa_bool_t work_done = FALSE;
658 pa_usec_t max_sleep_usec = 0, process_usec = 0;
663 pa_sink_assert_ref(u->sink);
666 hw_sleep_time(u, &max_sleep_usec, &process_usec);
672 pa_bool_t after_avail = TRUE;
674 if (PA_UNLIKELY((n = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
676 if ((r = try_recover(u, "snd_pcm_avail", (int) n)) == 0)
682 n_bytes = (size_t) n * u->frame_size;
683 left_to_play = check_left_to_play(u, n_bytes, on_timeout);
688 /* We won't fill up the playback buffer before at least
689 * half the sleep time is over because otherwise we might
690 * ask for more data from the clients then they expect. We
691 * need to guarantee that clients only have to keep around
692 * a single hw buffer length. */
695 pa_bytes_to_usec(left_to_play, &u->sink->sample_spec) > process_usec+max_sleep_usec/2)
698 if (PA_UNLIKELY(n_bytes <= u->hwbuf_unused)) {
702 char *dn = pa_alsa_get_driver_name_by_pcm(u->pcm_handle);
703 pa_log(_("ALSA woke us up to write new data to the device, but there was actually nothing to write!\n"
704 "Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.\n"
705 "We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail."),
715 pa_log_debug("Not filling up, because already too many iterations.");
721 n_bytes -= u->hwbuf_unused;
725 snd_pcm_sframes_t frames;
728 /* pa_log_debug("%lu frames to write", (unsigned long) frames); */
730 if (u->memchunk.length <= 0)
731 pa_sink_render(u->sink, n_bytes, &u->memchunk);
733 pa_assert(u->memchunk.length > 0);
735 frames = (snd_pcm_sframes_t) (u->memchunk.length / u->frame_size);
737 if (frames > (snd_pcm_sframes_t) (n_bytes/u->frame_size))
738 frames = (snd_pcm_sframes_t) (n_bytes/u->frame_size);
740 p = pa_memblock_acquire(u->memchunk.memblock);
741 frames = snd_pcm_writei(u->pcm_handle, (const uint8_t*) p + u->memchunk.index, (snd_pcm_uframes_t) frames);
742 pa_memblock_release(u->memchunk.memblock);
744 if (PA_UNLIKELY(frames < 0)) {
746 if (!after_avail && (int) frames == -EAGAIN)
749 if ((r = try_recover(u, "snd_pcm_writei", (int) frames)) == 0)
755 if (!after_avail && frames == 0)
758 pa_assert(frames > 0);
761 u->memchunk.index += (size_t) frames * u->frame_size;
762 u->memchunk.length -= (size_t) frames * u->frame_size;
764 if (u->memchunk.length <= 0) {
765 pa_memblock_unref(u->memchunk.memblock);
766 pa_memchunk_reset(&u->memchunk);
771 u->write_count += frames * u->frame_size;
772 u->since_start += frames * u->frame_size;
774 /* pa_log_debug("wrote %lu frames", (unsigned long) frames); */
776 if ((size_t) frames * u->frame_size >= n_bytes)
779 n_bytes -= (size_t) frames * u->frame_size;
784 *sleep_usec = pa_bytes_to_usec(left_to_play, &u->sink->sample_spec);
786 if (*sleep_usec > process_usec)
787 *sleep_usec -= process_usec;
793 return work_done ? 1 : 0;
796 static void update_smoother(struct userdata *u) {
797 snd_pcm_sframes_t delay = 0;
800 pa_usec_t now1 = 0, now2;
801 snd_pcm_status_t *status;
803 snd_pcm_status_alloca(&status);
806 pa_assert(u->pcm_handle);
808 /* Let's update the time smoother */
810 if (PA_UNLIKELY((err = pa_alsa_safe_delay(u->pcm_handle, &delay, u->hwbuf_size, &u->sink->sample_spec, FALSE)) < 0)) {
811 pa_log_warn("Failed to query DSP status data: %s", pa_alsa_strerror(err));
815 if (PA_UNLIKELY((err = snd_pcm_status(u->pcm_handle, status)) < 0))
816 pa_log_warn("Failed to get timestamp: %s", pa_alsa_strerror(err));
818 snd_htimestamp_t htstamp = { 0, 0 };
819 snd_pcm_status_get_htstamp(status, &htstamp);
820 now1 = pa_timespec_load(&htstamp);
823 /* Hmm, if the timestamp is 0, then it wasn't set and we take the current time */
825 now1 = pa_rtclock_now();
827 /* check if the time since the last update is bigger than the interval */
828 if (u->last_smoother_update > 0)
829 if (u->last_smoother_update + u->smoother_interval > now1)
832 position = (int64_t) u->write_count - ((int64_t) delay * (int64_t) u->frame_size);
834 if (PA_UNLIKELY(position < 0))
837 now2 = pa_bytes_to_usec((uint64_t) position, &u->sink->sample_spec);
839 pa_smoother_put(u->smoother, now1, now2);
841 u->last_smoother_update = now1;
842 /* exponentially increase the update interval up to the MAX limit */
843 u->smoother_interval = PA_MIN (u->smoother_interval * 2, SMOOTHER_MAX_INTERVAL);
846 static pa_usec_t sink_get_latency(struct userdata *u) {
849 pa_usec_t now1, now2;
853 now1 = pa_rtclock_now();
854 now2 = pa_smoother_get(u->smoother, now1);
856 delay = (int64_t) pa_bytes_to_usec(u->write_count, &u->sink->sample_spec) - (int64_t) now2;
858 r = delay >= 0 ? (pa_usec_t) delay : 0;
860 if (u->memchunk.memblock)
861 r += pa_bytes_to_usec(u->memchunk.length, &u->sink->sample_spec);
866 static int build_pollfd(struct userdata *u) {
868 pa_assert(u->pcm_handle);
870 if (u->alsa_rtpoll_item)
871 pa_rtpoll_item_free(u->alsa_rtpoll_item);
873 if (!(u->alsa_rtpoll_item = pa_alsa_build_pollfd(u->pcm_handle, u->rtpoll)))
879 /* Called from IO context */
880 static int suspend(struct userdata *u) {
882 pa_assert(u->pcm_handle);
884 pa_smoother_pause(u->smoother, pa_rtclock_now());
886 /* Let's suspend -- we don't call snd_pcm_drain() here since that might
887 * take awfully long with our long buffer sizes today. */
888 snd_pcm_close(u->pcm_handle);
889 u->pcm_handle = NULL;
891 if (u->alsa_rtpoll_item) {
892 pa_rtpoll_item_free(u->alsa_rtpoll_item);
893 u->alsa_rtpoll_item = NULL;
896 /* We reset max_rewind/max_request here to make sure that while we
897 * are suspended the old max_request/max_rewind values set before
898 * the suspend can influence the per-stream buffer of newly
899 * created streams, without their requirements having any
900 * influence on them. */
901 pa_sink_set_max_rewind_within_thread(u->sink, 0);
902 pa_sink_set_max_request_within_thread(u->sink, 0);
904 pa_log_info("Device suspended...");
909 /* Called from IO context */
910 static int update_sw_params(struct userdata *u) {
911 snd_pcm_uframes_t avail_min;
916 /* Use the full buffer if noone asked us for anything specific */
922 if ((latency = pa_sink_get_requested_latency_within_thread(u->sink)) != (pa_usec_t) -1) {
925 pa_log_debug("Latency set to %0.2fms", (double) latency / PA_USEC_PER_MSEC);
927 b = pa_usec_to_bytes(latency, &u->sink->sample_spec);
929 /* We need at least one sample in our buffer */
931 if (PA_UNLIKELY(b < u->frame_size))
934 u->hwbuf_unused = PA_LIKELY(b < u->hwbuf_size) ? (u->hwbuf_size - b) : 0;
937 fix_min_sleep_wakeup(u);
938 fix_tsched_watermark(u);
941 pa_log_debug("hwbuf_unused=%lu", (unsigned long) u->hwbuf_unused);
943 /* We need at last one frame in the used part of the buffer */
944 avail_min = (snd_pcm_uframes_t) u->hwbuf_unused / u->frame_size + 1;
947 pa_usec_t sleep_usec, process_usec;
949 hw_sleep_time(u, &sleep_usec, &process_usec);
950 avail_min += pa_usec_to_bytes(sleep_usec, &u->sink->sample_spec) / u->frame_size;
953 pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min);
955 if ((err = pa_alsa_set_sw_params(u->pcm_handle, avail_min, !u->use_tsched)) < 0) {
956 pa_log("Failed to set software parameters: %s", pa_alsa_strerror(err));
960 pa_sink_set_max_request_within_thread(u->sink, u->hwbuf_size - u->hwbuf_unused);
961 if (pa_alsa_pcm_is_hw(u->pcm_handle))
962 pa_sink_set_max_rewind_within_thread(u->sink, u->hwbuf_size);
964 pa_log_info("Disabling rewind_within_thread for device %s", u->device_name);
965 pa_sink_set_max_rewind_within_thread(u->sink, 0);
971 /* Called from IO context */
972 static int unsuspend(struct userdata *u) {
976 snd_pcm_uframes_t period_size, buffer_size;
979 pa_assert(!u->pcm_handle);
981 pa_log_info("Trying resume...");
983 if ((err = snd_pcm_open(&u->pcm_handle, u->device_name, SND_PCM_STREAM_PLAYBACK,
985 SND_PCM_NO_AUTO_RESAMPLE|
986 SND_PCM_NO_AUTO_CHANNELS|
987 SND_PCM_NO_AUTO_FORMAT)) < 0) {
988 pa_log("Error opening PCM device %s: %s", u->device_name, pa_alsa_strerror(err));
992 ss = u->sink->sample_spec;
993 period_size = u->fragment_size / u->frame_size;
994 buffer_size = u->hwbuf_size / u->frame_size;
998 if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &period_size, &buffer_size, 0, &b, &d, TRUE)) < 0) {
999 pa_log("Failed to set hardware parameters: %s", pa_alsa_strerror(err));
1003 if (b != u->use_mmap || d != u->use_tsched) {
1004 pa_log_warn("Resume failed, couldn't get original access mode.");
1008 if (!pa_sample_spec_equal(&ss, &u->sink->sample_spec)) {
1009 pa_log_warn("Resume failed, couldn't restore original sample settings.");
1013 if (period_size*u->frame_size != u->fragment_size ||
1014 buffer_size*u->frame_size != u->hwbuf_size) {
1015 pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %lu/%lu, New %lu/%lu)",
1016 (unsigned long) u->hwbuf_size, (unsigned long) u->fragment_size,
1017 (unsigned long) (buffer_size*u->frame_size), (unsigned long) (period_size*u->frame_size));
1021 if (update_sw_params(u) < 0)
1024 if (build_pollfd(u) < 0)
1028 pa_smoother_reset(u->smoother, pa_rtclock_now(), TRUE);
1029 u->smoother_interval = SMOOTHER_MIN_INTERVAL;
1030 u->last_smoother_update = 0;
1035 pa_log_info("Resumed successfully...");
1040 if (u->pcm_handle) {
1041 snd_pcm_close(u->pcm_handle);
1042 u->pcm_handle = NULL;
1048 /* Called from IO context */
1049 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
1050 struct userdata *u = PA_SINK(o)->userdata;
1054 case PA_SINK_MESSAGE_GET_LATENCY: {
1058 r = sink_get_latency(u);
1060 *((pa_usec_t*) data) = r;
1065 case PA_SINK_MESSAGE_SET_STATE:
1067 switch ((pa_sink_state_t) PA_PTR_TO_UINT(data)) {
1069 case PA_SINK_SUSPENDED: {
1072 pa_assert(PA_SINK_IS_OPENED(u->sink->thread_info.state));
1074 if ((r = suspend(u)) < 0)
1081 case PA_SINK_RUNNING: {
1084 if (u->sink->thread_info.state == PA_SINK_INIT) {
1085 if (build_pollfd(u) < 0)
1089 if (u->sink->thread_info.state == PA_SINK_SUSPENDED) {
1090 if ((r = unsuspend(u)) < 0)
1097 case PA_SINK_UNLINKED:
1099 case PA_SINK_INVALID_STATE:
1106 return pa_sink_process_msg(o, code, data, offset, chunk);
1109 /* Called from main context */
1110 static int sink_set_state_cb(pa_sink *s, pa_sink_state_t new_state) {
1111 pa_sink_state_t old_state;
1114 pa_sink_assert_ref(s);
1115 pa_assert_se(u = s->userdata);
1117 old_state = pa_sink_get_state(u->sink);
1119 if (PA_SINK_IS_OPENED(old_state) && new_state == PA_SINK_SUSPENDED)
1121 else if (old_state == PA_SINK_SUSPENDED && PA_SINK_IS_OPENED(new_state))
1122 if (reserve_init(u, u->device_name) < 0)
1123 return -PA_ERR_BUSY;
1128 static int ctl_mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
1129 struct userdata *u = snd_mixer_elem_get_callback_private(elem);
1132 pa_assert(u->mixer_handle);
1134 if (mask == SND_CTL_EVENT_MASK_REMOVE)
1137 if (u->sink->suspend_cause & PA_SUSPEND_SESSION)
1140 if (mask & SND_CTL_EVENT_MASK_VALUE) {
1141 pa_sink_get_volume(u->sink, TRUE);
1142 pa_sink_get_mute(u->sink, TRUE);
1148 static int io_mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
1149 struct userdata *u = snd_mixer_elem_get_callback_private(elem);
1152 pa_assert(u->mixer_handle);
1154 if (mask == SND_CTL_EVENT_MASK_REMOVE)
1157 if (u->sink->suspend_cause & PA_SUSPEND_SESSION)
1160 if (mask & SND_CTL_EVENT_MASK_VALUE)
1161 pa_sink_update_volume_and_mute(u->sink);
1166 static void sink_get_volume_cb(pa_sink *s) {
1167 struct userdata *u = s->userdata;
1169 char vol_str_pcnt[PA_CVOLUME_SNPRINT_MAX];
1172 pa_assert(u->mixer_path);
1173 pa_assert(u->mixer_handle);
1175 if (pa_alsa_path_get_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &r) < 0)
1178 /* Shift down by the base volume, so that 0dB becomes maximum volume */
1179 pa_sw_cvolume_multiply_scalar(&r, &r, s->base_volume);
1181 pa_log_debug("Read hardware volume: %s", pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &r));
1183 if (u->mixer_path->has_dB) {
1184 char vol_str_db[PA_SW_CVOLUME_SNPRINT_DB_MAX];
1186 pa_log_debug(" in dB: %s", pa_sw_cvolume_snprint_dB(vol_str_db, sizeof(vol_str_db), &r));
1189 if (pa_cvolume_equal(&u->hardware_volume, &r))
1192 s->real_volume = u->hardware_volume = r;
1194 /* Hmm, so the hardware volume changed, let's reset our software volume */
1195 if (u->mixer_path->has_dB)
1196 pa_sink_set_soft_volume(s, NULL);
1199 static void sink_set_volume_cb(pa_sink *s) {
1200 struct userdata *u = s->userdata;
1202 char vol_str_pcnt[PA_CVOLUME_SNPRINT_MAX];
1203 pa_bool_t write_to_hw = (s->flags & PA_SINK_SYNC_VOLUME) ? FALSE : TRUE;
1206 pa_assert(u->mixer_path);
1207 pa_assert(u->mixer_handle);
1209 /* Shift up by the base volume */
1210 pa_sw_cvolume_divide_scalar(&r, &s->real_volume, s->base_volume);
1212 if (pa_alsa_path_set_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &r, write_to_hw) < 0)
1215 /* Shift down by the base volume, so that 0dB becomes maximum volume */
1216 pa_sw_cvolume_multiply_scalar(&r, &r, s->base_volume);
1218 u->hardware_volume = r;
1220 if (u->mixer_path->has_dB) {
1221 pa_cvolume new_soft_volume;
1222 pa_bool_t accurate_enough;
1223 char vol_str_db[PA_SW_CVOLUME_SNPRINT_DB_MAX];
1225 /* Match exactly what the user requested by software */
1226 pa_sw_cvolume_divide(&new_soft_volume, &s->real_volume, &u->hardware_volume);
1228 /* If the adjustment to do in software is only minimal we
1229 * can skip it. That saves us CPU at the expense of a bit of
1232 (pa_cvolume_min(&new_soft_volume) >= (PA_VOLUME_NORM - VOLUME_ACCURACY)) &&
1233 (pa_cvolume_max(&new_soft_volume) <= (PA_VOLUME_NORM + VOLUME_ACCURACY));
1235 pa_log_debug("Requested volume: %s", pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &s->real_volume));
1236 pa_log_debug(" in dB: %s", pa_sw_cvolume_snprint_dB(vol_str_db, sizeof(vol_str_db), &s->real_volume));
1237 pa_log_debug("Got hardware volume: %s", pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &u->hardware_volume));
1238 pa_log_debug(" in dB: %s", pa_sw_cvolume_snprint_dB(vol_str_db, sizeof(vol_str_db), &u->hardware_volume));
1239 pa_log_debug("Calculated software volume: %s (accurate-enough=%s)",
1240 pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &new_soft_volume),
1241 pa_yes_no(accurate_enough));
1242 pa_log_debug(" in dB: %s", pa_sw_cvolume_snprint_dB(vol_str_db, sizeof(vol_str_db), &new_soft_volume));
1244 if (!accurate_enough)
1245 s->soft_volume = new_soft_volume;
1248 pa_log_debug("Wrote hardware volume: %s", pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &r));
1250 /* We can't match exactly what the user requested, hence let's
1251 * at least tell the user about it */
1257 static void sink_write_volume_cb(pa_sink *s) {
1258 struct userdata *u = s->userdata;
1259 pa_cvolume hw_vol = s->thread_info.current_hw_volume;
1262 pa_assert(u->mixer_path);
1263 pa_assert(u->mixer_handle);
1264 pa_assert(s->flags & PA_SINK_SYNC_VOLUME);
1266 /* Shift up by the base volume */
1267 pa_sw_cvolume_divide_scalar(&hw_vol, &hw_vol, s->base_volume);
1269 if (pa_alsa_path_set_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &hw_vol, TRUE) < 0)
1270 pa_log_error("Writing HW volume failed");
1273 pa_bool_t accurate_enough;
1275 /* Shift down by the base volume, so that 0dB becomes maximum volume */
1276 pa_sw_cvolume_multiply_scalar(&hw_vol, &hw_vol, s->base_volume);
1278 pa_sw_cvolume_divide(&tmp_vol, &hw_vol, &s->thread_info.current_hw_volume);
1280 (pa_cvolume_min(&tmp_vol) >= (PA_VOLUME_NORM - VOLUME_ACCURACY)) &&
1281 (pa_cvolume_max(&tmp_vol) <= (PA_VOLUME_NORM + VOLUME_ACCURACY));
1283 if (!accurate_enough) {
1284 char vol_str_pcnt[PA_CVOLUME_SNPRINT_MAX];
1285 char vol_str_db[PA_SW_CVOLUME_SNPRINT_DB_MAX];
1287 pa_log_debug("Written HW volume did not match with the request: %s (request) != %s",
1288 pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &s->thread_info.current_hw_volume),
1289 pa_cvolume_snprint(vol_str_pcnt, sizeof(vol_str_pcnt), &hw_vol));
1290 pa_log_debug(" in dB: %s (request) != %s",
1291 pa_sw_cvolume_snprint_dB(vol_str_db, sizeof(vol_str_db), &s->thread_info.current_hw_volume),
1292 pa_sw_cvolume_snprint_dB(vol_str_db, sizeof(vol_str_db), &hw_vol));
1297 static void sink_get_mute_cb(pa_sink *s) {
1298 struct userdata *u = s->userdata;
1302 pa_assert(u->mixer_path);
1303 pa_assert(u->mixer_handle);
1305 if (pa_alsa_path_get_mute(u->mixer_path, u->mixer_handle, &b) < 0)
1311 static void sink_set_mute_cb(pa_sink *s) {
1312 struct userdata *u = s->userdata;
1315 pa_assert(u->mixer_path);
1316 pa_assert(u->mixer_handle);
1318 pa_alsa_path_set_mute(u->mixer_path, u->mixer_handle, s->muted);
1321 static int sink_set_port_cb(pa_sink *s, pa_device_port *p) {
1322 struct userdata *u = s->userdata;
1323 pa_alsa_port_data *data;
1327 pa_assert(u->mixer_handle);
1329 data = PA_DEVICE_PORT_DATA(p);
1331 pa_assert_se(u->mixer_path = data->path);
1332 pa_alsa_path_select(u->mixer_path, u->mixer_handle);
1334 if (u->mixer_path->has_volume && u->mixer_path->has_dB) {
1335 s->base_volume = pa_sw_volume_from_dB(-u->mixer_path->max_dB);
1336 s->n_volume_steps = PA_VOLUME_NORM+1;
1338 pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(s->base_volume));
1340 s->base_volume = PA_VOLUME_NORM;
1341 s->n_volume_steps = u->mixer_path->max_volume - u->mixer_path->min_volume + 1;
1345 pa_alsa_setting_select(data->setting, u->mixer_handle);
1355 static void sink_update_requested_latency_cb(pa_sink *s) {
1356 struct userdata *u = s->userdata;
1359 pa_assert(u->use_tsched); /* only when timer scheduling is used
1360 * we can dynamically adjust the
1366 before = u->hwbuf_unused;
1367 update_sw_params(u);
1369 /* Let's check whether we now use only a smaller part of the
1370 buffer then before. If so, we need to make sure that subsequent
1371 rewinds are relative to the new maximum fill level and not to the
1372 current fill level. Thus, let's do a full rewind once, to clear
1375 if (u->hwbuf_unused > before) {
1376 pa_log_debug("Requesting rewind due to latency change.");
1377 pa_sink_request_rewind(s, (size_t) -1);
1381 static int process_rewind(struct userdata *u) {
1382 snd_pcm_sframes_t unused;
1383 size_t rewind_nbytes, unused_nbytes, limit_nbytes;
1386 /* Figure out how much we shall rewind and reset the counter */
1387 rewind_nbytes = u->sink->thread_info.rewind_nbytes;
1389 pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes);
1391 if (PA_UNLIKELY((unused = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
1392 pa_log("snd_pcm_avail() failed: %s", pa_alsa_strerror((int) unused));
1396 unused_nbytes = (size_t) unused * u->frame_size;
1398 /* make sure rewind doesn't go too far, can cause issues with DMAs */
1399 unused_nbytes += u->rewind_safeguard;
1401 if (u->hwbuf_size > unused_nbytes)
1402 limit_nbytes = u->hwbuf_size - unused_nbytes;
1406 if (rewind_nbytes > limit_nbytes)
1407 rewind_nbytes = limit_nbytes;
1409 if (rewind_nbytes > 0) {
1410 snd_pcm_sframes_t in_frames, out_frames;
1412 pa_log_debug("Limited to %lu bytes.", (unsigned long) rewind_nbytes);
1414 in_frames = (snd_pcm_sframes_t) (rewind_nbytes / u->frame_size);
1415 pa_log_debug("before: %lu", (unsigned long) in_frames);
1416 if ((out_frames = snd_pcm_rewind(u->pcm_handle, (snd_pcm_uframes_t) in_frames)) < 0) {
1417 pa_log("snd_pcm_rewind() failed: %s", pa_alsa_strerror((int) out_frames));
1418 if (try_recover(u, "process_rewind", out_frames) < 0)
1423 pa_log_debug("after: %lu", (unsigned long) out_frames);
1425 rewind_nbytes = (size_t) out_frames * u->frame_size;
1427 if (rewind_nbytes <= 0)
1428 pa_log_info("Tried rewind, but was apparently not possible.");
1430 u->write_count -= rewind_nbytes;
1431 pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
1432 pa_sink_process_rewind(u->sink, rewind_nbytes);
1434 u->after_rewind = TRUE;
1438 pa_log_debug("Mhmm, actually there is nothing to rewind.");
1440 pa_sink_process_rewind(u->sink, 0);
1444 static void thread_func(void *userdata) {
1445 struct userdata *u = userdata;
1446 unsigned short revents = 0;
1450 pa_log_debug("Thread starting up");
1452 if (u->core->realtime_scheduling)
1453 pa_make_realtime(u->core->realtime_priority);
1455 pa_thread_mq_install(&u->thread_mq);
1459 pa_usec_t rtpoll_sleep = 0;
1462 pa_log_debug("Loop");
1465 /* Render some data and write it to the dsp */
1466 if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
1468 pa_usec_t sleep_usec = 0;
1469 pa_bool_t on_timeout = pa_rtpoll_timer_elapsed(u->rtpoll);
1471 if (PA_UNLIKELY(u->sink->thread_info.rewind_requested))
1472 if (process_rewind(u) < 0)
1476 work_done = mmap_write(u, &sleep_usec, revents & POLLOUT, on_timeout);
1478 work_done = unix_write(u, &sleep_usec, revents & POLLOUT, on_timeout);
1483 /* pa_log_debug("work_done = %i", work_done); */
1488 pa_log_info("Starting playback.");
1489 snd_pcm_start(u->pcm_handle);
1491 pa_smoother_resume(u->smoother, pa_rtclock_now(), TRUE);
1499 if (u->use_tsched) {
1502 if (u->since_start <= u->hwbuf_size) {
1504 /* USB devices on ALSA seem to hit a buffer
1505 * underrun during the first iterations much
1506 * quicker then we calculate here, probably due to
1507 * the transport latency. To accommodate for that
1508 * we artificially decrease the sleep time until
1509 * we have filled the buffer at least once
1512 if (pa_log_ratelimit())
1513 pa_log_debug("Cutting sleep time for the initial iterations by half.");
1517 /* OK, the playback buffer is now full, let's
1518 * calculate when to wake up next */
1519 /* pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) sleep_usec / PA_USEC_PER_MSEC); */
1521 /* Convert from the sound card time domain to the
1522 * system time domain */
1523 cusec = pa_smoother_translate(u->smoother, pa_rtclock_now(), sleep_usec);
1525 /* pa_log_debug("Waking up in %0.2fms (system clock).", (double) cusec / PA_USEC_PER_MSEC); */
1527 /* We don't trust the conversion, so we wake up whatever comes first */
1528 rtpoll_sleep = PA_MIN(sleep_usec, cusec);
1531 u->after_rewind = FALSE;
1535 if (u->sink->flags & PA_SINK_SYNC_VOLUME) {
1536 pa_usec_t volume_sleep;
1537 pa_sink_volume_change_apply(u->sink, &volume_sleep);
1538 if (volume_sleep > 0)
1539 rtpoll_sleep = MIN(volume_sleep, rtpoll_sleep);
1542 if (rtpoll_sleep > 0)
1543 pa_rtpoll_set_timer_relative(u->rtpoll, rtpoll_sleep);
1545 pa_rtpoll_set_timer_disabled(u->rtpoll);
1547 /* Hmm, nothing to do. Let's sleep */
1548 if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
1551 if (u->sink->flags & PA_SINK_SYNC_VOLUME)
1552 pa_sink_volume_change_apply(u->sink, NULL);
1557 /* Tell ALSA about this and process its response */
1558 if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
1559 struct pollfd *pollfd;
1563 pollfd = pa_rtpoll_item_get_pollfd(u->alsa_rtpoll_item, &n);
1565 if ((err = snd_pcm_poll_descriptors_revents(u->pcm_handle, pollfd, n, &revents)) < 0) {
1566 pa_log("snd_pcm_poll_descriptors_revents() failed: %s", pa_alsa_strerror(err));
1570 if (revents & ~POLLOUT) {
1571 if (pa_alsa_recover_from_poll(u->pcm_handle, revents) < 0)
1576 } else if (revents && u->use_tsched && pa_log_ratelimit())
1577 pa_log_debug("Wakeup from ALSA!");
1584 /* If this was no regular exit from the loop we have to continue
1585 * processing messages until we received PA_MESSAGE_SHUTDOWN */
1586 pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
1587 pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
1590 pa_log_debug("Thread shutting down");
1593 static void set_sink_name(pa_sink_new_data *data, pa_modargs *ma, const char *device_id, const char *device_name, pa_alsa_mapping *mapping) {
1599 pa_assert(device_name);
1601 if ((n = pa_modargs_get_value(ma, "sink_name", NULL))) {
1602 pa_sink_new_data_set_name(data, n);
1603 data->namereg_fail = TRUE;
1607 if ((n = pa_modargs_get_value(ma, "name", NULL)))
1608 data->namereg_fail = TRUE;
1610 n = device_id ? device_id : device_name;
1611 data->namereg_fail = FALSE;
1615 t = pa_sprintf_malloc("alsa_output.%s.%s", n, mapping->name);
1617 t = pa_sprintf_malloc("alsa_output.%s", n);
1619 pa_sink_new_data_set_name(data, t);
1623 static void find_mixer(struct userdata *u, pa_alsa_mapping *mapping, const char *element, pa_bool_t ignore_dB) {
1625 if (!mapping && !element)
1628 if (!(u->mixer_handle = pa_alsa_open_mixer_for_pcm(u->pcm_handle, &u->control_device))) {
1629 pa_log_info("Failed to find a working mixer device.");
1635 if (!(u->mixer_path = pa_alsa_path_synthesize(element, PA_ALSA_DIRECTION_OUTPUT)))
1638 if (pa_alsa_path_probe(u->mixer_path, u->mixer_handle, ignore_dB) < 0)
1641 pa_log_debug("Probed mixer path %s:", u->mixer_path->name);
1642 pa_alsa_path_dump(u->mixer_path);
1645 if (!(u->mixer_path_set = pa_alsa_path_set_new(mapping, PA_ALSA_DIRECTION_OUTPUT)))
1648 pa_alsa_path_set_probe(u->mixer_path_set, u->mixer_handle, ignore_dB);
1650 pa_log_debug("Probed mixer paths:");
1651 pa_alsa_path_set_dump(u->mixer_path_set);
1658 if (u->mixer_path_set) {
1659 pa_alsa_path_set_free(u->mixer_path_set);
1660 u->mixer_path_set = NULL;
1661 } else if (u->mixer_path) {
1662 pa_alsa_path_free(u->mixer_path);
1663 u->mixer_path = NULL;
1666 if (u->mixer_handle) {
1667 snd_mixer_close(u->mixer_handle);
1668 u->mixer_handle = NULL;
1672 static int setup_mixer(struct userdata *u, pa_bool_t ignore_dB, pa_bool_t sync_volume) {
1673 int (*mixer_callback)(snd_mixer_elem_t *, unsigned int);
1677 if (!u->mixer_handle)
1680 if (u->sink->active_port) {
1681 pa_alsa_port_data *data;
1683 /* We have a list of supported paths, so let's activate the
1684 * one that has been chosen as active */
1686 data = PA_DEVICE_PORT_DATA(u->sink->active_port);
1687 u->mixer_path = data->path;
1689 pa_alsa_path_select(data->path, u->mixer_handle);
1692 pa_alsa_setting_select(data->setting, u->mixer_handle);
1696 if (!u->mixer_path && u->mixer_path_set)
1697 u->mixer_path = u->mixer_path_set->paths;
1699 if (u->mixer_path) {
1700 /* Hmm, we have only a single path, then let's activate it */
1702 pa_alsa_path_select(u->mixer_path, u->mixer_handle);
1704 if (u->mixer_path->settings)
1705 pa_alsa_setting_select(u->mixer_path->settings, u->mixer_handle);
1710 /* FIXME: need automatic detection rather than hard-coded path */
1711 if (!strcmp(u->mixer_path->name, "iec958-passthrough-output")) {
1712 u->sink->flags |= PA_SINK_PASSTHROUGH;
1714 u->sink->flags &= ~PA_SINK_PASSTHROUGH;
1717 if (!u->mixer_path->has_volume)
1718 pa_log_info("Driver does not support hardware volume control, falling back to software volume control.");
1721 if (u->mixer_path->has_dB) {
1722 pa_log_info("Hardware volume ranges from %0.2f dB to %0.2f dB.", u->mixer_path->min_dB, u->mixer_path->max_dB);
1724 u->sink->base_volume = pa_sw_volume_from_dB(-u->mixer_path->max_dB);
1725 u->sink->n_volume_steps = PA_VOLUME_NORM+1;
1727 if (u->mixer_path->max_dB > 0.0)
1728 pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(u->sink->base_volume));
1730 pa_log_info("No particular base volume set, fixing to 0 dB");
1733 pa_log_info("Hardware volume ranges from %li to %li.", u->mixer_path->min_volume, u->mixer_path->max_volume);
1734 u->sink->base_volume = PA_VOLUME_NORM;
1735 u->sink->n_volume_steps = u->mixer_path->max_volume - u->mixer_path->min_volume + 1;
1738 u->sink->get_volume = sink_get_volume_cb;
1739 u->sink->set_volume = sink_set_volume_cb;
1740 u->sink->write_volume = sink_write_volume_cb;
1742 u->sink->flags |= PA_SINK_HW_VOLUME_CTRL;
1743 if (u->mixer_path->has_dB) {
1744 u->sink->flags |= PA_SINK_DECIBEL_VOLUME;
1746 u->sink->flags |= PA_SINK_SYNC_VOLUME;
1747 pa_log_info("Successfully enabled synchronous volume.");
1751 pa_log_info("Using hardware volume control. Hardware dB scale %s.", u->mixer_path->has_dB ? "supported" : "not supported");
1754 if (!u->mixer_path->has_mute) {
1755 pa_log_info("Driver does not support hardware mute control, falling back to software mute control.");
1757 u->sink->get_mute = sink_get_mute_cb;
1758 u->sink->set_mute = sink_set_mute_cb;
1759 u->sink->flags |= PA_SINK_HW_MUTE_CTRL;
1760 pa_log_info("Using hardware mute control.");
1764 u->mixer_pd = pa_alsa_mixer_pdata_new();
1765 mixer_callback = io_mixer_callback;
1767 if (pa_alsa_set_mixer_rtpoll(u->mixer_pd, u->mixer_handle, u->rtpoll) < 0) {
1768 pa_log("Failed to initialize file descriptor monitoring");
1773 u->mixer_fdl = pa_alsa_fdlist_new();
1774 mixer_callback = ctl_mixer_callback;
1776 if (pa_alsa_fdlist_set_mixer(u->mixer_fdl, u->mixer_handle, u->core->mainloop) < 0) {
1777 pa_log("Failed to initialize file descriptor monitoring");
1782 if (u->mixer_path_set)
1783 pa_alsa_path_set_set_callback(u->mixer_path_set, u->mixer_handle, mixer_callback, u);
1785 pa_alsa_path_set_callback(u->mixer_path, u->mixer_handle, mixer_callback, u);
1790 pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_card *card, pa_alsa_mapping *mapping) {
1792 struct userdata *u = NULL;
1793 const char *dev_id = NULL;
1794 pa_sample_spec ss, requested_ss;
1796 uint32_t nfrags, frag_size, buffer_size, tsched_size, tsched_watermark, rewind_safeguard;
1797 snd_pcm_uframes_t period_frames, buffer_frames, tsched_frames;
1799 pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, ignore_dB = FALSE, namereg_fail = FALSE, sync_volume = FALSE;
1800 pa_sink_new_data data;
1801 pa_alsa_profile_set *profile_set = NULL;
1806 ss = m->core->default_sample_spec;
1807 map = m->core->default_channel_map;
1808 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_ALSA) < 0) {
1809 pa_log("Failed to parse sample specification and channel map");
1814 frame_size = pa_frame_size(&ss);
1816 nfrags = m->core->default_n_fragments;
1817 frag_size = (uint32_t) pa_usec_to_bytes(m->core->default_fragment_size_msec*PA_USEC_PER_MSEC, &ss);
1819 frag_size = (uint32_t) frame_size;
1820 tsched_size = (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC, &ss);
1821 tsched_watermark = (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_WATERMARK_USEC, &ss);
1823 if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 ||
1824 pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0 ||
1825 pa_modargs_get_value_u32(ma, "tsched_buffer_size", &tsched_size) < 0 ||
1826 pa_modargs_get_value_u32(ma, "tsched_buffer_watermark", &tsched_watermark) < 0) {
1827 pa_log("Failed to parse buffer metrics");
1831 buffer_size = nfrags * frag_size;
1833 period_frames = frag_size/frame_size;
1834 buffer_frames = buffer_size/frame_size;
1835 tsched_frames = tsched_size/frame_size;
1837 if (pa_modargs_get_value_boolean(ma, "mmap", &use_mmap) < 0) {
1838 pa_log("Failed to parse mmap argument.");
1842 if (pa_modargs_get_value_boolean(ma, "tsched", &use_tsched) < 0) {
1843 pa_log("Failed to parse tsched argument.");
1847 if (pa_modargs_get_value_boolean(ma, "ignore_dB", &ignore_dB) < 0) {
1848 pa_log("Failed to parse ignore_dB argument.");
1852 rewind_safeguard = PA_MAX(DEFAULT_REWIND_SAFEGUARD_BYTES, pa_usec_to_bytes(DEFAULT_REWIND_SAFEGUARD_USEC, &ss));
1853 if (pa_modargs_get_value_u32(ma, "rewind_safeguard", &rewind_safeguard) < 0) {
1854 pa_log("Failed to parse rewind_safeguard argument");
1858 sync_volume = m->core->sync_volume;
1859 if (pa_modargs_get_value_boolean(ma, "sync_volume", &sync_volume) < 0) {
1860 pa_log("Failed to parse sync_volume argument.");
1864 use_tsched = pa_alsa_may_tsched(use_tsched);
1866 u = pa_xnew0(struct userdata, 1);
1869 u->use_mmap = use_mmap;
1870 u->use_tsched = use_tsched;
1872 u->rewind_safeguard = rewind_safeguard;
1873 u->rtpoll = pa_rtpoll_new();
1874 pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
1876 u->smoother = pa_smoother_new(
1877 SMOOTHER_ADJUST_USEC,
1878 SMOOTHER_WINDOW_USEC,
1884 u->smoother_interval = SMOOTHER_MIN_INTERVAL;
1886 dev_id = pa_modargs_get_value(
1888 pa_modargs_get_value(ma, "device", DEFAULT_DEVICE));
1890 if (reserve_init(u, dev_id) < 0)
1893 if (reserve_monitor_init(u, dev_id) < 0)
1901 if (!(dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
1902 pa_log("device_id= not set");
1906 if (!(u->pcm_handle = pa_alsa_open_by_device_id_mapping(
1910 SND_PCM_STREAM_PLAYBACK,
1911 &period_frames, &buffer_frames, tsched_frames,
1916 } else if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
1918 if (!(profile_set = pa_alsa_profile_set_new(NULL, &map)))
1921 if (!(u->pcm_handle = pa_alsa_open_by_device_id_auto(
1925 SND_PCM_STREAM_PLAYBACK,
1926 &period_frames, &buffer_frames, tsched_frames,
1927 &b, &d, profile_set, &mapping)))
1933 if (!(u->pcm_handle = pa_alsa_open_by_device_string(
1934 pa_modargs_get_value(ma, "device", DEFAULT_DEVICE),
1937 SND_PCM_STREAM_PLAYBACK,
1938 &period_frames, &buffer_frames, tsched_frames,
1943 pa_assert(u->device_name);
1944 pa_log_info("Successfully opened device %s.", u->device_name);
1946 if (pa_alsa_pcm_is_modem(u->pcm_handle)) {
1947 pa_log_notice("Device %s is modem, refusing further initialization.", u->device_name);
1952 pa_log_info("Selected mapping '%s' (%s).", mapping->description, mapping->name);
1954 if (use_mmap && !b) {
1955 pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode.");
1956 u->use_mmap = use_mmap = FALSE;
1959 if (use_tsched && (!b || !d)) {
1960 pa_log_info("Cannot enable timer-based scheduling, falling back to sound IRQ scheduling.");
1961 u->use_tsched = use_tsched = FALSE;
1965 pa_log_info("Successfully enabled mmap() mode.");
1968 pa_log_info("Successfully enabled timer-based scheduling mode.");
1970 /* ALSA might tweak the sample spec, so recalculate the frame size */
1971 frame_size = pa_frame_size(&ss);
1973 find_mixer(u, mapping, pa_modargs_get_value(ma, "control", NULL), ignore_dB);
1975 pa_sink_new_data_init(&data);
1976 data.driver = driver;
1979 set_sink_name(&data, ma, dev_id, u->device_name, mapping);
1981 /* We need to give pa_modargs_get_value_boolean() a pointer to a local
1982 * variable instead of using &data.namereg_fail directly, because
1983 * data.namereg_fail is a bitfield and taking the address of a bitfield
1984 * variable is impossible. */
1985 namereg_fail = data.namereg_fail;
1986 if (pa_modargs_get_value_boolean(ma, "namereg_fail", &namereg_fail) < 0) {
1987 pa_log("Failed to parse boolean argument namereg_fail.");
1988 pa_sink_new_data_done(&data);
1991 data.namereg_fail = namereg_fail;
1993 pa_sink_new_data_set_sample_spec(&data, &ss);
1994 pa_sink_new_data_set_channel_map(&data, &map);
1996 pa_alsa_init_proplist_pcm(m->core, data.proplist, u->pcm_handle);
1997 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
1998 pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) (buffer_frames * frame_size));
1999 pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE, "%lu", (unsigned long) (period_frames * frame_size));
2000 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_ACCESS_MODE, u->use_tsched ? "mmap+timer" : (u->use_mmap ? "mmap" : "serial"));
2003 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_PROFILE_NAME, mapping->name);
2004 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_PROFILE_DESCRIPTION, mapping->description);
2007 pa_alsa_init_description(data.proplist);
2009 if (u->control_device)
2010 pa_alsa_init_proplist_ctl(data.proplist, u->control_device);
2012 if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
2013 pa_log("Invalid properties");
2014 pa_sink_new_data_done(&data);
2018 if (u->mixer_path_set)
2019 pa_alsa_add_ports(&data.ports, u->mixer_path_set);
2021 u->sink = pa_sink_new(m->core, &data, PA_SINK_HARDWARE|PA_SINK_LATENCY|(u->use_tsched ? PA_SINK_DYNAMIC_LATENCY : 0));
2022 pa_sink_new_data_done(&data);
2025 pa_log("Failed to create sink object");
2029 if (pa_modargs_get_value_u32(ma, "sync_volume_safety_margin",
2030 &u->sink->thread_info.volume_change_safety_margin) < 0) {
2031 pa_log("Failed to parse sync_volume_safety_margin parameter");
2035 if (pa_modargs_get_value_s32(ma, "sync_volume_extra_delay",
2036 &u->sink->thread_info.volume_change_extra_delay) < 0) {
2037 pa_log("Failed to parse sync_volume_extra_delay parameter");
2041 u->sink->parent.process_msg = sink_process_msg;
2043 u->sink->update_requested_latency = sink_update_requested_latency_cb;
2044 u->sink->set_state = sink_set_state_cb;
2045 u->sink->set_port = sink_set_port_cb;
2046 u->sink->userdata = u;
2048 pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
2049 pa_sink_set_rtpoll(u->sink, u->rtpoll);
2051 u->frame_size = frame_size;
2052 u->fragment_size = frag_size = (size_t) (period_frames * frame_size);
2053 u->hwbuf_size = buffer_size = (size_t) (buffer_frames * frame_size);
2054 pa_cvolume_mute(&u->hardware_volume, u->sink->sample_spec.channels);
2056 pa_log_info("Using %0.1f fragments of size %lu bytes (%0.2fms), buffer size is %lu bytes (%0.2fms)",
2057 (double) u->hwbuf_size / (double) u->fragment_size,
2058 (long unsigned) u->fragment_size,
2059 (double) pa_bytes_to_usec(u->fragment_size, &ss) / PA_USEC_PER_MSEC,
2060 (long unsigned) u->hwbuf_size,
2061 (double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC);
2063 pa_sink_set_max_request(u->sink, u->hwbuf_size);
2064 if (pa_alsa_pcm_is_hw(u->pcm_handle))
2065 pa_sink_set_max_rewind(u->sink, u->hwbuf_size);
2067 pa_log_info("Disabling rewind for device %s", u->device_name);
2068 pa_sink_set_max_rewind(u->sink, 0);
2071 if (u->use_tsched) {
2072 u->tsched_watermark = pa_usec_to_bytes_round_up(pa_bytes_to_usec_round_up(tsched_watermark, &requested_ss), &u->sink->sample_spec);
2074 u->watermark_inc_step = pa_usec_to_bytes(TSCHED_WATERMARK_INC_STEP_USEC, &u->sink->sample_spec);
2075 u->watermark_dec_step = pa_usec_to_bytes(TSCHED_WATERMARK_DEC_STEP_USEC, &u->sink->sample_spec);
2077 u->watermark_inc_threshold = pa_usec_to_bytes_round_up(TSCHED_WATERMARK_INC_THRESHOLD_USEC, &u->sink->sample_spec);
2078 u->watermark_dec_threshold = pa_usec_to_bytes_round_up(TSCHED_WATERMARK_DEC_THRESHOLD_USEC, &u->sink->sample_spec);
2080 fix_min_sleep_wakeup(u);
2081 fix_tsched_watermark(u);
2083 pa_sink_set_latency_range(u->sink,
2085 pa_bytes_to_usec(u->hwbuf_size, &ss));
2087 pa_log_info("Time scheduling watermark is %0.2fms",
2088 (double) pa_bytes_to_usec(u->tsched_watermark, &ss) / PA_USEC_PER_MSEC);
2090 pa_sink_set_fixed_latency(u->sink, pa_bytes_to_usec(u->hwbuf_size, &ss));
2094 if (update_sw_params(u) < 0)
2097 if (setup_mixer(u, ignore_dB, sync_volume) < 0)
2100 pa_alsa_dump(PA_LOG_DEBUG, u->pcm_handle);
2102 if (!(u->thread = pa_thread_new("alsa-sink", thread_func, u))) {
2103 pa_log("Failed to create thread.");
2107 /* Get initial mixer settings */
2108 if (data.volume_is_set) {
2109 if (u->sink->set_volume)
2110 u->sink->set_volume(u->sink);
2112 if (u->sink->get_volume)
2113 u->sink->get_volume(u->sink);
2116 if (data.muted_is_set) {
2117 if (u->sink->set_mute)
2118 u->sink->set_mute(u->sink);
2120 if (u->sink->get_mute)
2121 u->sink->get_mute(u->sink);
2124 pa_sink_put(u->sink);
2127 pa_alsa_profile_set_free(profile_set);
2137 pa_alsa_profile_set_free(profile_set);
2142 static void userdata_free(struct userdata *u) {
2146 pa_sink_unlink(u->sink);
2149 pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
2150 pa_thread_free(u->thread);
2153 pa_thread_mq_done(&u->thread_mq);
2156 pa_sink_unref(u->sink);
2158 if (u->memchunk.memblock)
2159 pa_memblock_unref(u->memchunk.memblock);
2162 pa_alsa_mixer_pdata_free(u->mixer_pd);
2164 if (u->alsa_rtpoll_item)
2165 pa_rtpoll_item_free(u->alsa_rtpoll_item);
2168 pa_rtpoll_free(u->rtpoll);
2170 if (u->pcm_handle) {
2171 snd_pcm_drop(u->pcm_handle);
2172 snd_pcm_close(u->pcm_handle);
2176 pa_alsa_fdlist_free(u->mixer_fdl);
2178 if (u->mixer_path_set)
2179 pa_alsa_path_set_free(u->mixer_path_set);
2180 else if (u->mixer_path)
2181 pa_alsa_path_free(u->mixer_path);
2183 if (u->mixer_handle)
2184 snd_mixer_close(u->mixer_handle);
2187 pa_smoother_free(u->smoother);
2192 pa_xfree(u->device_name);
2193 pa_xfree(u->control_device);
2197 void pa_alsa_sink_free(pa_sink *s) {
2200 pa_sink_assert_ref(s);
2201 pa_assert_se(u = s->userdata);