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 #include <pulse/xmalloc.h>
32 #include <pulse/util.h>
33 #include <pulse/timeval.h>
35 #include <pulsecore/core.h>
36 #include <pulsecore/module.h>
37 #include <pulsecore/memchunk.h>
38 #include <pulsecore/sink.h>
39 #include <pulsecore/modargs.h>
40 #include <pulsecore/core-util.h>
41 #include <pulsecore/sample-util.h>
42 #include <pulsecore/log.h>
43 #include <pulsecore/macro.h>
44 #include <pulsecore/thread.h>
45 #include <pulsecore/core-error.h>
46 #include <pulsecore/thread-mq.h>
47 #include <pulsecore/rtpoll.h>
48 #include <pulsecore/rtclock.h>
49 #include <pulsecore/time-smoother.h>
51 #include "alsa-util.h"
52 #include "module-alsa-sink-symdef.h"
54 PA_MODULE_AUTHOR("Lennart Poettering");
55 PA_MODULE_DESCRIPTION("ALSA Sink");
56 PA_MODULE_VERSION(PACKAGE_VERSION
);
57 PA_MODULE_LOAD_ONCE(FALSE
);
59 "sink_name=<name for the sink> "
60 "device=<ALSA device> "
61 "device_id=<ALSA card index> "
62 "format=<sample format> "
64 "channels=<number of channels> "
65 "channel_map=<channel map> "
66 "fragments=<number of fragments> "
67 "fragment_size=<fragment size> "
68 "mmap=<enable memory mapping?> "
69 "tsched=<enable system timer based scheduling mode?> "
70 "tsched_buffer_size=<buffer size when using timer based scheduling> "
71 "tsched_buffer_watermark=<lower fill watermark> "
72 "mixer_reset=<reset hw volume and mute settings to sane defaults when falling back to software?>");
74 static const char* const valid_modargs
[] = {
87 "tsched_buffer_watermark",
92 #define DEFAULT_DEVICE "default"
93 #define DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s */
94 #define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms */
95 #define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
96 #define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
104 pa_thread_mq thread_mq
;
107 snd_pcm_t
*pcm_handle
;
109 pa_alsa_fdlist
*mixer_fdl
;
110 snd_mixer_t
*mixer_handle
;
111 snd_mixer_elem_t
*mixer_elem
;
112 long hw_volume_max
, hw_volume_min
;
113 long hw_dB_max
, hw_dB_min
;
114 pa_bool_t hw_dB_supported
;
116 size_t frame_size
, fragment_size
, hwbuf_size
, tsched_watermark
;
118 pa_memchunk memchunk
;
122 pa_bool_t use_mmap
, use_tsched
;
124 pa_bool_t first
, after_rewind
;
126 pa_rtpoll_item
*alsa_rtpoll_item
;
128 snd_mixer_selem_channel_id_t mixer_map
[SND_MIXER_SCHN_LAST
];
130 pa_smoother
*smoother
;
132 uint64_t since_start
;
134 snd_pcm_sframes_t hwbuf_unused_frames
;
137 static void fix_tsched_watermark(struct userdata
*u
) {
139 size_t min_sleep
, min_wakeup
;
142 max_use
= u
->hwbuf_size
- u
->hwbuf_unused_frames
* u
->frame_size
;
144 min_sleep
= pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC
, &u
->sink
->sample_spec
);
145 min_wakeup
= pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC
, &u
->sink
->sample_spec
);
147 if (min_sleep
> max_use
/2)
148 min_sleep
= pa_frame_align(max_use
/2, &u
->sink
->sample_spec
);
149 if (min_sleep
< u
->frame_size
)
150 min_sleep
= u
->frame_size
;
152 if (min_wakeup
> max_use
/2)
153 min_wakeup
= pa_frame_align(max_use
/2, &u
->sink
->sample_spec
);
154 if (min_wakeup
< u
->frame_size
)
155 min_wakeup
= u
->frame_size
;
157 if (u
->tsched_watermark
> max_use
-min_sleep
)
158 u
->tsched_watermark
= max_use
-min_sleep
;
160 if (u
->tsched_watermark
< min_wakeup
)
161 u
->tsched_watermark
= min_wakeup
;
164 static void hw_sleep_time(struct userdata
*u
, pa_usec_t
*sleep_usec
, pa_usec_t
*process_usec
) {
167 pa_assert(sleep_usec
);
168 pa_assert(process_usec
);
172 usec
= pa_sink_get_requested_latency_within_thread(u
->sink
);
174 if (usec
== (pa_usec_t
) -1)
175 usec
= pa_bytes_to_usec(u
->hwbuf_size
, &u
->sink
->sample_spec
);
177 /* pa_log_debug("hw buffer time: %u ms", (unsigned) (usec / PA_USEC_PER_MSEC)); */
179 wm
= pa_bytes_to_usec(u
->tsched_watermark
, &u
->sink
->sample_spec
);
182 *sleep_usec
= usec
- wm
;
185 *process_usec
= *sleep_usec
= usec
/ 2;
187 /* pa_log_debug("after watermark: %u ms", (unsigned) (*sleep_usec / PA_USEC_PER_MSEC)); */
190 static int try_recover(struct userdata
*u
, const char *call
, int err
) {
195 pa_log_debug("%s: %s", call
, snd_strerror(err
));
197 pa_assert(err
!= -EAGAIN
);
200 pa_log_debug("%s: Buffer underrun!", call
);
202 if ((err
= snd_pcm_recover(u
->pcm_handle
, err
, 1)) == 0) {
208 pa_log("%s: %s", call
, snd_strerror(err
));
212 static size_t check_left_to_play(struct userdata
*u
, snd_pcm_sframes_t n
) {
215 if (n
*u
->frame_size
< u
->hwbuf_size
)
216 left_to_play
= u
->hwbuf_size
- (n
*u
->frame_size
);
220 if (left_to_play
> 0) {
221 /* 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); */
222 } else if (!u
->first
&& !u
->after_rewind
) {
223 pa_log_info("Underrun!");
226 size_t old_watermark
= u
->tsched_watermark
;
228 u
->tsched_watermark
*= 2;
229 fix_tsched_watermark(u
);
231 if (old_watermark
!= u
->tsched_watermark
)
232 pa_log_notice("Increasing wakeup watermark to %0.2f ms",
233 (double) pa_bytes_to_usec(u
->tsched_watermark
, &u
->sink
->sample_spec
) / PA_USEC_PER_MSEC
);
240 static int mmap_write(struct userdata
*u
, pa_usec_t
*sleep_usec
) {
242 pa_usec_t max_sleep_usec
, process_usec
;
246 pa_sink_assert_ref(u
->sink
);
249 hw_sleep_time(u
, &max_sleep_usec
, &process_usec
);
255 snd_pcm_hwsync(u
->pcm_handle
);
257 /* First we determine how many samples are missing to fill the
258 * buffer up to 100% */
260 if (PA_UNLIKELY((n
= snd_pcm_avail_update(u
->pcm_handle
)) < 0)) {
262 if ((r
= try_recover(u
, "snd_pcm_avail_update", n
)) == 0)
268 left_to_play
= check_left_to_play(u
, n
);
272 /* We won't fill up the playback buffer before at least
273 * half the sleep time is over because otherwise we might
274 * ask for more data from the clients then they expect. We
275 * need to guarantee that clients only have to keep around
276 * a single hw buffer length. */
278 if (pa_bytes_to_usec(left_to_play
, &u
->sink
->sample_spec
) > process_usec
+max_sleep_usec
/2)
281 if (PA_UNLIKELY(n
<= u
->hwbuf_unused_frames
))
284 n
-= u
->hwbuf_unused_frames
;
286 /* pa_log_debug("Filling up"); */
292 const snd_pcm_channel_area_t
*areas
;
293 snd_pcm_uframes_t offset
, frames
= (snd_pcm_uframes_t
) n
;
295 /* pa_log_debug("%lu frames to write", (unsigned long) frames); */
297 if (PA_UNLIKELY((err
= snd_pcm_mmap_begin(u
->pcm_handle
, &areas
, &offset
, &frames
)) < 0)) {
299 if ((r
= try_recover(u
, "snd_pcm_mmap_begin", err
)) == 0)
305 /* Make sure that if these memblocks need to be copied they will fit into one slot */
306 if (frames
> pa_mempool_block_size_max(u
->sink
->core
->mempool
)/u
->frame_size
)
307 frames
= pa_mempool_block_size_max(u
->sink
->core
->mempool
)/u
->frame_size
;
309 /* Check these are multiples of 8 bit */
310 pa_assert((areas
[0].first
& 7) == 0);
311 pa_assert((areas
[0].step
& 7)== 0);
313 /* We assume a single interleaved memory buffer */
314 pa_assert((areas
[0].first
>> 3) == 0);
315 pa_assert((areas
[0].step
>> 3) == u
->frame_size
);
317 p
= (uint8_t*) areas
[0].addr
+ (offset
* u
->frame_size
);
319 chunk
.memblock
= pa_memblock_new_fixed(u
->core
->mempool
, p
, frames
* u
->frame_size
, TRUE
);
320 chunk
.length
= pa_memblock_get_length(chunk
.memblock
);
323 pa_sink_render_into_full(u
->sink
, &chunk
);
325 /* FIXME: Maybe we can do something to keep this memory block
326 * a little bit longer around? */
327 pa_memblock_unref_fixed(chunk
.memblock
);
329 if (PA_UNLIKELY((err
= snd_pcm_mmap_commit(u
->pcm_handle
, offset
, frames
)) < 0)) {
331 if ((r
= try_recover(u
, "snd_pcm_mmap_commit", err
)) == 0)
339 u
->frame_index
+= frames
;
340 u
->since_start
+= frames
* u
->frame_size
;
342 /* pa_log_debug("wrote %lu frames", (unsigned long) frames); */
344 if (frames
>= (snd_pcm_uframes_t
) n
)
351 *sleep_usec
= pa_bytes_to_usec(left_to_play
, &u
->sink
->sample_spec
) - process_usec
;
355 static int unix_write(struct userdata
*u
, pa_usec_t
*sleep_usec
) {
357 pa_usec_t max_sleep_usec
, process_usec
;
361 pa_sink_assert_ref(u
->sink
);
364 hw_sleep_time(u
, &max_sleep_usec
, &process_usec
);
370 snd_pcm_hwsync(u
->pcm_handle
);
372 if (PA_UNLIKELY((n
= snd_pcm_avail_update(u
->pcm_handle
)) < 0)) {
374 if ((r
= try_recover(u
, "snd_pcm_avail_update", n
)) == 0)
380 left_to_play
= check_left_to_play(u
, n
);
384 /* We won't fill up the playback buffer before at least
385 * half the sleep time is over because otherwise we might
386 * ask for more data from the clients then they expect. We
387 * need to guarantee that clients only have to keep around
388 * a single hw buffer length. */
390 if (pa_bytes_to_usec(left_to_play
, &u
->sink
->sample_spec
) > process_usec
+max_sleep_usec
/2)
393 if (PA_UNLIKELY(n
<= u
->hwbuf_unused_frames
))
396 n
-= u
->hwbuf_unused_frames
;
399 snd_pcm_sframes_t frames
;
402 /* pa_log_debug("%lu frames to write", (unsigned long) frames); */
404 if (u
->memchunk
.length
<= 0)
405 pa_sink_render(u
->sink
, n
* u
->frame_size
, &u
->memchunk
);
407 pa_assert(u
->memchunk
.length
> 0);
409 frames
= u
->memchunk
.length
/ u
->frame_size
;
414 p
= pa_memblock_acquire(u
->memchunk
.memblock
);
415 frames
= snd_pcm_writei(u
->pcm_handle
, (const uint8_t*) p
+ u
->memchunk
.index
, frames
);
416 pa_memblock_release(u
->memchunk
.memblock
);
418 pa_assert(frames
!= 0);
420 if (PA_UNLIKELY(frames
< 0)) {
422 if ((r
= try_recover(u
, "snd_pcm_writei", n
)) == 0)
428 u
->memchunk
.index
+= frames
* u
->frame_size
;
429 u
->memchunk
.length
-= frames
* u
->frame_size
;
431 if (u
->memchunk
.length
<= 0) {
432 pa_memblock_unref(u
->memchunk
.memblock
);
433 pa_memchunk_reset(&u
->memchunk
);
438 u
->frame_index
+= frames
;
439 u
->since_start
+= frames
* u
->frame_size
;
441 /* pa_log_debug("wrote %lu frames", (unsigned long) frames); */
450 *sleep_usec
= pa_bytes_to_usec(left_to_play
, &u
->sink
->sample_spec
) - process_usec
;
454 static void update_smoother(struct userdata
*u
) {
455 snd_pcm_sframes_t delay
= 0;
458 pa_usec_t now1
, now2
;
459 /* struct timeval timestamp; */
460 snd_pcm_status_t
*status
;
462 snd_pcm_status_alloca(&status
);
465 pa_assert(u
->pcm_handle
);
467 /* Let's update the time smoother */
469 snd_pcm_hwsync(u
->pcm_handle
);
470 snd_pcm_avail_update(u
->pcm_handle
);
472 /* if (PA_UNLIKELY((err = snd_pcm_status(u->pcm_handle, status)) < 0)) { */
473 /* pa_log("Failed to query DSP status data: %s", snd_strerror(err)); */
477 /* delay = snd_pcm_status_get_delay(status); */
479 if (PA_UNLIKELY((err
= snd_pcm_delay(u
->pcm_handle
, &delay
)) < 0)) {
480 pa_log("Failed to query DSP status data: %s", snd_strerror(err
));
484 frames
= u
->frame_index
- delay
;
486 /* pa_log_debug("frame_index = %llu, delay = %llu, p = %llu", (unsigned long long) u->frame_index, (unsigned long long) delay, (unsigned long long) frames); */
488 /* snd_pcm_status_get_tstamp(status, ×tamp); */
489 /* pa_rtclock_from_wallclock(×tamp); */
490 /* now1 = pa_timeval_load(×tamp); */
492 now1
= pa_rtclock_usec();
493 now2
= pa_bytes_to_usec(frames
* u
->frame_size
, &u
->sink
->sample_spec
);
494 pa_smoother_put(u
->smoother
, now1
, now2
);
497 static pa_usec_t
sink_get_latency(struct userdata
*u
) {
500 pa_usec_t now1
, now2
;
504 now1
= pa_rtclock_usec();
505 now2
= pa_smoother_get(u
->smoother
, now1
);
507 delay
= (int64_t) pa_bytes_to_usec(u
->frame_index
* u
->frame_size
, &u
->sink
->sample_spec
) - (int64_t) now2
;
510 r
= (pa_usec_t
) delay
;
512 if (u
->memchunk
.memblock
)
513 r
+= pa_bytes_to_usec(u
->memchunk
.length
, &u
->sink
->sample_spec
);
518 static int build_pollfd(struct userdata
*u
) {
520 pa_assert(u
->pcm_handle
);
522 if (u
->alsa_rtpoll_item
)
523 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
525 if (!(u
->alsa_rtpoll_item
= pa_alsa_build_pollfd(u
->pcm_handle
, u
->rtpoll
)))
531 static int suspend(struct userdata
*u
) {
533 pa_assert(u
->pcm_handle
);
535 pa_smoother_pause(u
->smoother
, pa_rtclock_usec());
538 snd_pcm_drain(u
->pcm_handle
);
539 snd_pcm_close(u
->pcm_handle
);
540 u
->pcm_handle
= NULL
;
542 if (u
->alsa_rtpoll_item
) {
543 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
544 u
->alsa_rtpoll_item
= NULL
;
547 pa_log_info("Device suspended...");
552 static int update_sw_params(struct userdata
*u
) {
553 snd_pcm_uframes_t avail_min
;
558 /* Use the full buffer if noone asked us for anything specific */
559 u
->hwbuf_unused_frames
= 0;
564 if ((latency
= pa_sink_get_requested_latency_within_thread(u
->sink
)) != (pa_usec_t
) -1) {
567 pa_log_debug("latency set to %0.2f", (double) latency
/ PA_USEC_PER_MSEC
);
569 b
= pa_usec_to_bytes(latency
, &u
->sink
->sample_spec
);
571 /* We need at least one sample in our buffer */
573 if (PA_UNLIKELY(b
< u
->frame_size
))
576 u
->hwbuf_unused_frames
=
577 PA_LIKELY(b
< u
->hwbuf_size
) ?
578 ((u
->hwbuf_size
- b
) / u
->frame_size
) : 0;
580 fix_tsched_watermark(u
);
584 pa_log_debug("hwbuf_unused_frames=%lu", (unsigned long) u
->hwbuf_unused_frames
);
586 /* We need at last one frame in the used part of the buffer */
587 avail_min
= u
->hwbuf_unused_frames
+ 1;
590 pa_usec_t sleep_usec
, process_usec
;
592 hw_sleep_time(u
, &sleep_usec
, &process_usec
);
593 avail_min
+= pa_usec_to_bytes(sleep_usec
, &u
->sink
->sample_spec
);
596 pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min
);
598 if ((err
= pa_alsa_set_sw_params(u
->pcm_handle
, avail_min
)) < 0) {
599 pa_log("Failed to set software parameters: %s", snd_strerror(err
));
603 pa_sink_set_max_request(u
->sink
, u
->hwbuf_size
- u
->hwbuf_unused_frames
* u
->frame_size
);
608 static int unsuspend(struct userdata
*u
) {
613 snd_pcm_uframes_t period_size
;
616 pa_assert(!u
->pcm_handle
);
618 pa_log_info("Trying resume...");
620 snd_config_update_free_global();
621 if ((err
= snd_pcm_open(&u
->pcm_handle
, u
->device_name
, SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
)) < 0) {
622 pa_log("Error opening PCM device %s: %s", u
->device_name
, snd_strerror(err
));
626 ss
= u
->sink
->sample_spec
;
627 nfrags
= u
->nfragments
;
628 period_size
= u
->fragment_size
/ u
->frame_size
;
632 if ((err
= pa_alsa_set_hw_params(u
->pcm_handle
, &ss
, &nfrags
, &period_size
, u
->hwbuf_size
/ u
->frame_size
, &b
, &d
, TRUE
)) < 0) {
633 pa_log("Failed to set hardware parameters: %s", snd_strerror(err
));
637 if (b
!= u
->use_mmap
|| d
!= u
->use_tsched
) {
638 pa_log_warn("Resume failed, couldn't get original access mode.");
642 if (!pa_sample_spec_equal(&ss
, &u
->sink
->sample_spec
)) {
643 pa_log_warn("Resume failed, couldn't restore original sample settings.");
647 if (nfrags
!= u
->nfragments
|| period_size
*u
->frame_size
!= u
->fragment_size
) {
648 pa_log_warn("Resume failed, couldn't restore original fragment settings.");
652 if (update_sw_params(u
) < 0)
655 if (build_pollfd(u
) < 0)
658 /* FIXME: We need to reload the volume somehow */
663 pa_log_info("Resumed successfully...");
669 snd_pcm_close(u
->pcm_handle
);
670 u
->pcm_handle
= NULL
;
676 static int sink_process_msg(pa_msgobject
*o
, int code
, void *data
, int64_t offset
, pa_memchunk
*chunk
) {
677 struct userdata
*u
= PA_SINK(o
)->userdata
;
681 case PA_SINK_MESSAGE_GET_LATENCY
: {
685 r
= sink_get_latency(u
);
687 *((pa_usec_t
*) data
) = r
;
692 case PA_SINK_MESSAGE_SET_STATE
:
694 switch ((pa_sink_state_t
) PA_PTR_TO_UINT(data
)) {
696 case PA_SINK_SUSPENDED
:
697 pa_assert(PA_SINK_IS_OPENED(u
->sink
->thread_info
.state
));
705 case PA_SINK_RUNNING
:
707 if (u
->sink
->thread_info
.state
== PA_SINK_INIT
) {
708 if (build_pollfd(u
) < 0)
712 if (u
->sink
->thread_info
.state
== PA_SINK_SUSPENDED
) {
713 if (unsuspend(u
) < 0)
719 case PA_SINK_UNLINKED
:
727 return pa_sink_process_msg(o
, code
, data
, offset
, chunk
);
730 static int mixer_callback(snd_mixer_elem_t
*elem
, unsigned int mask
) {
731 struct userdata
*u
= snd_mixer_elem_get_callback_private(elem
);
734 pa_assert(u
->mixer_handle
);
736 if (mask
== SND_CTL_EVENT_MASK_REMOVE
)
739 if (mask
& SND_CTL_EVENT_MASK_VALUE
) {
740 pa_sink_get_volume(u
->sink
);
741 pa_sink_get_mute(u
->sink
);
747 static int sink_get_volume_cb(pa_sink
*s
) {
748 struct userdata
*u
= s
->userdata
;
753 pa_assert(u
->mixer_elem
);
755 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
758 pa_assert(snd_mixer_selem_has_playback_channel(u
->mixer_elem
, u
->mixer_map
[i
]));
760 if (u
->hw_dB_supported
) {
762 if ((err
= snd_mixer_selem_get_playback_dB(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
)) >= 0) {
763 s
->volume
.values
[i
] = pa_sw_volume_from_dB(alsa_vol
/ 100.0);
767 u
->hw_dB_supported
= FALSE
;
770 if ((err
= snd_mixer_selem_get_playback_volume(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
)) < 0)
773 s
->volume
.values
[i
] = (pa_volume_t
) roundf(((float) (alsa_vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
) / (u
->hw_volume_max
- u
->hw_volume_min
));
779 pa_log_error("Unable to read volume: %s", snd_strerror(err
));
784 static int sink_set_volume_cb(pa_sink
*s
) {
785 struct userdata
*u
= s
->userdata
;
790 pa_assert(u
->mixer_elem
);
792 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
796 pa_assert(snd_mixer_selem_has_playback_channel(u
->mixer_elem
, u
->mixer_map
[i
]));
798 vol
= PA_MIN(s
->volume
.values
[i
], PA_VOLUME_NORM
);
800 if (u
->hw_dB_supported
) {
801 alsa_vol
= (long) (pa_sw_volume_to_dB(vol
) * 100);
802 alsa_vol
= PA_CLAMP_UNLIKELY(alsa_vol
, u
->hw_dB_min
, u
->hw_dB_max
);
804 if ((err
= snd_mixer_selem_set_playback_dB(u
->mixer_elem
, u
->mixer_map
[i
], alsa_vol
, -1)) >= 0) {
806 if (snd_mixer_selem_get_playback_dB(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
) >= 0)
807 s
->volume
.values
[i
] = pa_sw_volume_from_dB(alsa_vol
/ 100.0);
812 u
->hw_dB_supported
= FALSE
;
816 alsa_vol
= (long) roundf(((float) vol
* (u
->hw_volume_max
- u
->hw_volume_min
)) / PA_VOLUME_NORM
) + u
->hw_volume_min
;
817 alsa_vol
= PA_CLAMP_UNLIKELY(alsa_vol
, u
->hw_volume_min
, u
->hw_volume_max
);
819 if ((err
= snd_mixer_selem_set_playback_volume(u
->mixer_elem
, u
->mixer_map
[i
], alsa_vol
)) < 0)
822 if (snd_mixer_selem_get_playback_volume(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
) >= 0)
823 s
->volume
.values
[i
] = (pa_volume_t
) roundf(((float) (alsa_vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
) / (u
->hw_volume_max
- u
->hw_volume_min
));
829 pa_log_error("Unable to set volume: %s", snd_strerror(err
));
834 static int sink_get_mute_cb(pa_sink
*s
) {
835 struct userdata
*u
= s
->userdata
;
839 pa_assert(u
->mixer_elem
);
841 if ((err
= snd_mixer_selem_get_playback_switch(u
->mixer_elem
, 0, &sw
)) < 0) {
842 pa_log_error("Unable to get switch: %s", snd_strerror(err
));
851 static int sink_set_mute_cb(pa_sink
*s
) {
852 struct userdata
*u
= s
->userdata
;
856 pa_assert(u
->mixer_elem
);
858 if ((err
= snd_mixer_selem_set_playback_switch_all(u
->mixer_elem
, !s
->muted
)) < 0) {
859 pa_log_error("Unable to set switch: %s", snd_strerror(err
));
866 static void sink_update_requested_latency_cb(pa_sink
*s
) {
867 struct userdata
*u
= s
->userdata
;
868 snd_pcm_sframes_t before
;
874 before
= u
->hwbuf_unused_frames
;
877 /* Let's check whether we now use only a smaller part of the
878 buffer then before. If so, we need to make sure that subsequent
879 rewinds are relative to the new maxium fill level and not to the
880 current fill level. Thus, let's do a full rewind once, to clear
883 if (u
->hwbuf_unused_frames
> before
) {
884 pa_log_debug("Requesting rewind due to latency change.");
885 pa_sink_request_rewind(s
, (size_t) -1);
889 static int process_rewind(struct userdata
*u
) {
890 snd_pcm_sframes_t unused
;
891 size_t rewind_nbytes
, unused_nbytes
, limit_nbytes
;
894 /* Figure out how much we shall rewind and reset the counter */
895 rewind_nbytes
= u
->sink
->thread_info
.rewind_nbytes
;
896 u
->sink
->thread_info
.rewind_nbytes
= 0;
898 if (rewind_nbytes
<= 0)
901 pa_assert(rewind_nbytes
> 0);
902 pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes
);
904 snd_pcm_hwsync(u
->pcm_handle
);
905 if ((unused
= snd_pcm_avail_update(u
->pcm_handle
)) < 0) {
906 pa_log("snd_pcm_avail_update() failed: %s", snd_strerror(unused
));
910 unused_nbytes
= u
->tsched_watermark
+ (size_t) unused
* u
->frame_size
;
912 if (u
->hwbuf_size
> unused_nbytes
)
913 limit_nbytes
= u
->hwbuf_size
- unused_nbytes
;
917 if (rewind_nbytes
> limit_nbytes
)
918 rewind_nbytes
= limit_nbytes
;
920 if (rewind_nbytes
> 0) {
921 snd_pcm_sframes_t in_frames
, out_frames
;
923 pa_log_debug("Limited to %lu bytes.", (unsigned long) rewind_nbytes
);
925 in_frames
= (snd_pcm_sframes_t
) rewind_nbytes
/ u
->frame_size
;
926 pa_log_debug("before: %lu", (unsigned long) in_frames
);
927 if ((out_frames
= snd_pcm_rewind(u
->pcm_handle
, in_frames
)) < 0) {
928 pa_log("snd_pcm_rewind() failed: %s", snd_strerror(out_frames
));
931 pa_log_debug("after: %lu", (unsigned long) out_frames
);
933 rewind_nbytes
= out_frames
* u
->frame_size
;
935 if (rewind_nbytes
<= 0)
936 pa_log_info("Tried rewind, but was apparently not possible.");
938 u
->frame_index
-= out_frames
;
939 pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes
);
940 pa_sink_process_rewind(u
->sink
, rewind_nbytes
);
942 u
->after_rewind
= TRUE
;
946 pa_log_debug("Mhmm, actually there is nothing to rewind.");
950 pa_sink_process_rewind(u
->sink
, 0);
956 static void thread_func(void *userdata
) {
957 struct userdata
*u
= userdata
;
961 pa_log_debug("Thread starting up");
963 if (u
->core
->realtime_scheduling
)
964 pa_make_realtime(u
->core
->realtime_priority
);
966 pa_thread_mq_install(&u
->thread_mq
);
967 pa_rtpoll_install(u
->rtpoll
);
972 /* pa_log_debug("loop"); */
974 /* Render some data and write it to the dsp */
975 if (PA_SINK_IS_OPENED(u
->sink
->thread_info
.state
)) {
977 pa_usec_t sleep_usec
;
979 if (u
->sink
->thread_info
.rewind_requested
)
980 if (process_rewind(u
) < 0)
984 work_done
= mmap_write(u
, &sleep_usec
);
986 work_done
= unix_write(u
, &sleep_usec
);
991 /* pa_log_debug("work_done = %i", work_done); */
996 pa_log_info("Starting playback.");
997 snd_pcm_start(u
->pcm_handle
);
999 pa_smoother_resume(u
->smoother
, pa_rtclock_usec());
1005 if (u
->use_tsched
) {
1008 if (u
->since_start
<= u
->hwbuf_size
) {
1010 /* USB devices on ALSA seem to hit a buffer
1011 * underrun during the first iterations much
1012 * quicker then we calculate here, probably due to
1013 * the transport latency. To accomodate for that
1014 * we artificially decrease the sleep time until
1015 * we have filled the buffer at least once
1018 /*pa_log_debug("Cutting sleep time for the initial iterations by half.");*/
1022 /* OK, the playback buffer is now full, let's
1023 * calculate when to wake up next */
1024 /* pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) sleep_usec / PA_USEC_PER_MSEC); */
1026 /* Convert from the sound card time domain to the
1027 * system time domain */
1028 cusec
= pa_smoother_translate(u
->smoother
, pa_rtclock_usec(), sleep_usec
);
1030 /* pa_log_debug("Waking up in %0.2fms (system clock).", (double) cusec / PA_USEC_PER_MSEC); */
1032 /* We don't trust the conversion, so we wake up whatever comes first */
1033 pa_rtpoll_set_timer_relative(u
->rtpoll
, PA_MIN(sleep_usec
, cusec
));
1037 u
->after_rewind
= FALSE
;
1039 } else if (u
->use_tsched
)
1041 /* OK, we're in an invalid state, let's disable our timers */
1042 pa_rtpoll_set_timer_disabled(u
->rtpoll
);
1044 /* Hmm, nothing to do. Let's sleep */
1045 if ((ret
= pa_rtpoll_run(u
->rtpoll
, 1)) < 0)
1051 /* Tell ALSA about this and process its response */
1052 if (PA_SINK_IS_OPENED(u
->sink
->thread_info
.state
)) {
1053 struct pollfd
*pollfd
;
1054 unsigned short revents
= 0;
1058 pollfd
= pa_rtpoll_item_get_pollfd(u
->alsa_rtpoll_item
, &n
);
1060 if ((err
= snd_pcm_poll_descriptors_revents(u
->pcm_handle
, pollfd
, n
, &revents
)) < 0) {
1061 pa_log("snd_pcm_poll_descriptors_revents() failed: %s", snd_strerror(err
));
1065 if (revents
& (POLLERR
|POLLNVAL
|POLLHUP
)) {
1066 if (pa_alsa_recover_from_poll(u
->pcm_handle
, revents
) < 0)
1073 if (revents
&& u
->use_tsched
)
1074 pa_log_debug("Wakeup from ALSA! (%i)", revents
);
1079 /* If this was no regular exit from the loop we have to continue
1080 * processing messages until we received PA_MESSAGE_SHUTDOWN */
1081 pa_asyncmsgq_post(u
->thread_mq
.outq
, PA_MSGOBJECT(u
->core
), PA_CORE_MESSAGE_UNLOAD_MODULE
, u
->module
, 0, NULL
, NULL
);
1082 pa_asyncmsgq_wait_for(u
->thread_mq
.inq
, PA_MESSAGE_SHUTDOWN
);
1085 pa_log_debug("Thread shutting down");
1088 int pa__init(pa_module
*m
) {
1090 pa_modargs
*ma
= NULL
;
1091 struct userdata
*u
= NULL
;
1095 uint32_t nfrags
, hwbuf_size
, frag_size
, tsched_size
, tsched_watermark
;
1096 snd_pcm_uframes_t period_frames
, tsched_frames
;
1098 snd_pcm_info_t
*pcm_info
= NULL
;
1101 char *name_buf
= NULL
;
1102 pa_bool_t namereg_fail
;
1103 pa_bool_t use_mmap
= TRUE
, b
, use_tsched
= TRUE
, d
, mixer_reset
= TRUE
;
1105 pa_sink_new_data data
;
1107 snd_pcm_info_alloca(&pcm_info
);
1111 pa_alsa_redirect_errors_inc();
1113 if (!(ma
= pa_modargs_new(m
->argument
, valid_modargs
))) {
1114 pa_log("Failed to parse module arguments");
1118 ss
= m
->core
->default_sample_spec
;
1119 if (pa_modargs_get_sample_spec_and_channel_map(ma
, &ss
, &map
, PA_CHANNEL_MAP_ALSA
) < 0) {
1120 pa_log("Failed to parse sample specification and channel map");
1124 frame_size
= pa_frame_size(&ss
);
1126 nfrags
= m
->core
->default_n_fragments
;
1127 frag_size
= pa_usec_to_bytes(m
->core
->default_fragment_size_msec
*PA_USEC_PER_MSEC
, &ss
);
1129 frag_size
= frame_size
;
1130 tsched_size
= pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC
, &ss
);
1131 tsched_watermark
= pa_usec_to_bytes(DEFAULT_TSCHED_WATERMARK_USEC
, &ss
);
1133 if (pa_modargs_get_value_u32(ma
, "fragments", &nfrags
) < 0 ||
1134 pa_modargs_get_value_u32(ma
, "fragment_size", &frag_size
) < 0 ||
1135 pa_modargs_get_value_u32(ma
, "tsched_buffer_size", &tsched_size
) < 0 ||
1136 pa_modargs_get_value_u32(ma
, "tsched_buffer_watermark", &tsched_watermark
) < 0) {
1137 pa_log("Failed to parse buffer metrics");
1141 hwbuf_size
= frag_size
* nfrags
;
1142 period_frames
= frag_size
/frame_size
;
1143 tsched_frames
= tsched_size
/frame_size
;
1145 if (pa_modargs_get_value_boolean(ma
, "mmap", &use_mmap
) < 0) {
1146 pa_log("Failed to parse mmap argument.");
1150 if (pa_modargs_get_value_boolean(ma
, "tsched", &use_tsched
) < 0) {
1151 pa_log("Failed to parse tsched argument.");
1155 if (use_tsched
&& !pa_rtclock_hrtimer()) {
1156 pa_log("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
1160 if (pa_modargs_get_value_boolean(ma
, "mixer_reset", &mixer_reset
) < 0) {
1161 pa_log("Failed to parse mixer_reset argument.");
1165 u
= pa_xnew0(struct userdata
, 1);
1169 u
->use_mmap
= use_mmap
;
1170 u
->use_tsched
= use_tsched
;
1173 u
->after_rewind
= FALSE
;
1174 u
->rtpoll
= pa_rtpoll_new();
1175 pa_thread_mq_init(&u
->thread_mq
, m
->core
->mainloop
, u
->rtpoll
);
1176 u
->alsa_rtpoll_item
= NULL
;
1178 u
->smoother
= pa_smoother_new(DEFAULT_TSCHED_BUFFER_USEC
*2, DEFAULT_TSCHED_BUFFER_USEC
*2, TRUE
, 5);
1179 usec
= pa_rtclock_usec();
1180 pa_smoother_set_time_offset(u
->smoother
, usec
);
1181 pa_smoother_pause(u
->smoother
, usec
);
1183 snd_config_update_free_global();
1188 if ((dev_id
= pa_modargs_get_value(ma
, "device_id", NULL
))) {
1190 if (!(u
->pcm_handle
= pa_alsa_open_by_device_id(
1194 SND_PCM_STREAM_PLAYBACK
,
1195 &nfrags
, &period_frames
, tsched_frames
,
1202 if (!(u
->pcm_handle
= pa_alsa_open_by_device_string(
1203 pa_modargs_get_value(ma
, "device", DEFAULT_DEVICE
),
1206 SND_PCM_STREAM_PLAYBACK
,
1207 &nfrags
, &period_frames
, tsched_frames
,
1213 pa_assert(u
->device_name
);
1214 pa_log_info("Successfully opened device %s.", u
->device_name
);
1216 if (use_mmap
&& !b
) {
1217 pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode.");
1218 u
->use_mmap
= use_mmap
= FALSE
;
1221 if (use_tsched
&& (!b
|| !d
)) {
1222 pa_log_info("Cannot enabled timer-based scheduling, falling back to sound IRQ scheduling.");
1223 u
->use_tsched
= use_tsched
= FALSE
;
1227 pa_log_info("Successfully enabled mmap() mode.");
1230 pa_log_info("Successfully enabled timer-based scheduling mode.");
1232 if ((err
= snd_pcm_info(u
->pcm_handle
, pcm_info
)) < 0) {
1233 pa_log("Error fetching PCM info: %s", snd_strerror(err
));
1237 /* ALSA might tweak the sample spec, so recalculate the frame size */
1238 frame_size
= pa_frame_size(&ss
);
1240 if ((err
= snd_mixer_open(&u
->mixer_handle
, 0)) < 0)
1241 pa_log_warn("Error opening mixer: %s", snd_strerror(err
));
1243 pa_bool_t found
= FALSE
;
1245 if (pa_alsa_prepare_mixer(u
->mixer_handle
, u
->device_name
) >= 0)
1248 snd_pcm_info_t
*info
;
1250 snd_pcm_info_alloca(&info
);
1252 if (snd_pcm_info(u
->pcm_handle
, info
) >= 0) {
1256 if ((card
= snd_pcm_info_get_card(info
)) >= 0) {
1258 md
= pa_sprintf_malloc("hw:%i", card
);
1260 if (strcmp(u
->device_name
, md
))
1261 if (pa_alsa_prepare_mixer(u
->mixer_handle
, md
) >= 0)
1269 if (!(u
->mixer_elem
= pa_alsa_find_elem(u
->mixer_handle
, "Master", "PCM")))
1273 snd_mixer_close(u
->mixer_handle
);
1274 u
->mixer_handle
= NULL
;
1278 if ((name
= pa_modargs_get_value(ma
, "sink_name", NULL
)))
1279 namereg_fail
= TRUE
;
1281 name
= name_buf
= pa_sprintf_malloc("alsa_output.%s", u
->device_name
);
1282 namereg_fail
= FALSE
;
1285 pa_sink_new_data_init(&data
);
1286 data
.driver
= __FILE__
;
1288 pa_sink_new_data_set_name(&data
, name
);
1289 data
.namereg_fail
= namereg_fail
;
1290 pa_sink_new_data_set_sample_spec(&data
, &ss
);
1291 pa_sink_new_data_set_channel_map(&data
, &map
);
1293 pa_alsa_init_proplist(data
.proplist
, pcm_info
);
1294 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_STRING
, u
->device_name
);
1295 pa_proplist_setf(data
.proplist
, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE
, "%lu", (unsigned long) (period_frames
* frame_size
* nfrags
));
1296 pa_proplist_setf(data
.proplist
, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE
, "%lu", (unsigned long) (period_frames
* frame_size
));
1297 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_ACCESS_MODE
, u
->use_tsched
? "mmap+timer" : (u
->use_mmap
? "mmap" : "serial"));
1299 u
->sink
= pa_sink_new(m
->core
, &data
, PA_SINK_HARDWARE
|PA_SINK_LATENCY
);
1300 pa_sink_new_data_done(&data
);
1304 pa_log("Failed to create sink object");
1308 u
->sink
->parent
.process_msg
= sink_process_msg
;
1309 u
->sink
->update_requested_latency
= sink_update_requested_latency_cb
;
1310 u
->sink
->userdata
= u
;
1312 pa_sink_set_asyncmsgq(u
->sink
, u
->thread_mq
.inq
);
1313 pa_sink_set_rtpoll(u
->sink
, u
->rtpoll
);
1315 u
->frame_size
= frame_size
;
1316 u
->fragment_size
= frag_size
= period_frames
* frame_size
;
1317 u
->nfragments
= nfrags
;
1318 u
->hwbuf_size
= u
->fragment_size
* nfrags
;
1319 u
->hwbuf_unused_frames
= 0;
1320 u
->tsched_watermark
= tsched_watermark
;
1322 u
->hw_dB_supported
= FALSE
;
1323 u
->hw_dB_min
= u
->hw_dB_max
= 0;
1324 u
->hw_volume_min
= u
->hw_volume_max
= 0;
1327 fix_tsched_watermark(u
);
1329 u
->sink
->thread_info
.max_rewind
= use_tsched
? u
->hwbuf_size
: 0;
1330 u
->sink
->thread_info
.max_request
= u
->hwbuf_size
;
1332 pa_sink_set_latency_range(u
->sink
,
1333 !use_tsched
? pa_bytes_to_usec(u
->hwbuf_size
, &ss
) : (pa_usec_t
) -1,
1334 pa_bytes_to_usec(u
->hwbuf_size
, &ss
));
1336 pa_log_info("Using %u fragments of size %lu bytes, buffer time is %0.2fms",
1337 nfrags
, (long unsigned) u
->fragment_size
,
1338 (double) pa_bytes_to_usec(u
->hwbuf_size
, &ss
) / PA_USEC_PER_MSEC
);
1341 pa_log_info("Time scheduling watermark is %0.2fms",
1342 (double) pa_bytes_to_usec(u
->tsched_watermark
, &ss
) / PA_USEC_PER_MSEC
);
1344 if (update_sw_params(u
) < 0)
1347 pa_memchunk_reset(&u
->memchunk
);
1349 if (u
->mixer_handle
) {
1350 pa_assert(u
->mixer_elem
);
1352 if (snd_mixer_selem_has_playback_volume(u
->mixer_elem
))
1354 if (pa_alsa_calc_mixer_map(u
->mixer_elem
, &map
, u
->mixer_map
, TRUE
) >= 0 &&
1355 snd_mixer_selem_get_playback_volume_range(u
->mixer_elem
, &u
->hw_volume_min
, &u
->hw_volume_max
) >= 0) {
1357 pa_bool_t suitable
= TRUE
;
1359 pa_log_info("Volume ranges from %li to %li.", u
->hw_volume_min
, u
->hw_volume_max
);
1361 if (u
->hw_volume_min
> u
->hw_volume_max
) {
1363 pa_log_info("Minimal volume %li larger than maximum volume %li. Strange stuff Falling back to software volume control.", u
->hw_volume_min
, u
->hw_volume_max
);
1366 } else if (u
->hw_volume_max
- u
->hw_volume_min
< 3) {
1368 pa_log_info("Device has less than 4 volume levels. Falling back to software volume control.");
1371 } else if (snd_mixer_selem_get_playback_dB_range(u
->mixer_elem
, &u
->hw_dB_min
, &u
->hw_dB_max
) >= 0) {
1373 /* u->hw_dB_max = 0; u->hw_dB_min = -3000; Use this to make valgrind shut up */
1375 pa_log_info("Volume ranges from %0.2f dB to %0.2f dB.", u
->hw_dB_min
/100.0, u
->hw_dB_max
/100.0);
1377 /* Let's see if this thing actually is useful for muting */
1378 if (u
->hw_dB_min
> -6000) {
1379 pa_log_info("Device cannot attenuate for more than -60 dB (only %0.2f dB supported), falling back to software volume control.", ((double) u
->hw_dB_min
) / 100);
1382 } else if (u
->hw_dB_max
< 0) {
1384 pa_log_info("Device is still attenuated at maximum volume setting (%0.2f dB is maximum). Strange stuff. Falling back to software volume control.", ((double) u
->hw_dB_max
) / 100);
1387 } else if (u
->hw_dB_min
>= u
->hw_dB_max
) {
1389 pa_log_info("Minimal dB (%0.2f) larger or equal to maximum dB (%0.2f). Strange stuff. Falling back to software volume control.", ((double) u
->hw_dB_min
) / 100, ((double) u
->hw_dB_max
) / 100);
1394 if (u
->hw_dB_max
> 0) {
1395 /* dB > 0 means overamplification, and clipping, we don't want that here */
1396 pa_log_info("Device can do overamplification for %0.2f dB. Limiting to 0 db", ((double) u
->hw_dB_max
) / 100);
1400 u
->hw_dB_supported
= TRUE
;
1405 u
->sink
->get_volume
= sink_get_volume_cb
;
1406 u
->sink
->set_volume
= sink_set_volume_cb
;
1407 u
->sink
->flags
|= PA_SINK_HW_VOLUME_CTRL
| (u
->hw_dB_supported
? PA_SINK_DECIBEL_VOLUME
: 0);
1408 pa_log_info("Using hardware volume control. Hardware dB scale %s.", u
->hw_dB_supported
? "supported" : "not supported");
1410 } else if (mixer_reset
) {
1411 pa_log_info("Using software volume control. Trying to reset sound card to 0 dB.");
1412 pa_alsa_0dB_playback(u
->mixer_elem
);
1414 pa_log_info("Using software volume control. Leaving hw mixer controls untouched.");
1417 if (snd_mixer_selem_has_playback_switch(u
->mixer_elem
)) {
1418 u
->sink
->get_mute
= sink_get_mute_cb
;
1419 u
->sink
->set_mute
= sink_set_mute_cb
;
1420 u
->sink
->flags
|= PA_SINK_HW_MUTE_CTRL
;
1423 u
->mixer_fdl
= pa_alsa_fdlist_new();
1425 if (pa_alsa_fdlist_set_mixer(u
->mixer_fdl
, u
->mixer_handle
, m
->core
->mainloop
) < 0) {
1426 pa_log("Failed to initialize file descriptor monitoring");
1430 snd_mixer_elem_set_callback(u
->mixer_elem
, mixer_callback
);
1431 snd_mixer_elem_set_callback_private(u
->mixer_elem
, u
);
1433 u
->mixer_fdl
= NULL
;
1435 pa_alsa_dump(u
->pcm_handle
);
1437 if (!(u
->thread
= pa_thread_new(thread_func
, u
))) {
1438 pa_log("Failed to create thread.");
1442 /* Get initial mixer settings */
1443 if (data
.volume_is_set
) {
1444 if (u
->sink
->set_volume
)
1445 u
->sink
->set_volume(u
->sink
);
1447 if (u
->sink
->get_volume
)
1448 u
->sink
->get_volume(u
->sink
);
1451 if (data
.muted_is_set
) {
1452 if (u
->sink
->set_mute
)
1453 u
->sink
->set_mute(u
->sink
);
1455 if (u
->sink
->get_mute
)
1456 u
->sink
->get_mute(u
->sink
);
1459 pa_sink_put(u
->sink
);
1461 pa_modargs_free(ma
);
1468 pa_modargs_free(ma
);
1475 void pa__done(pa_module
*m
) {
1480 if (!(u
= m
->userdata
)) {
1481 pa_alsa_redirect_errors_dec();
1486 pa_sink_unlink(u
->sink
);
1489 pa_asyncmsgq_send(u
->thread_mq
.inq
, NULL
, PA_MESSAGE_SHUTDOWN
, NULL
, 0, NULL
);
1490 pa_thread_free(u
->thread
);
1493 pa_thread_mq_done(&u
->thread_mq
);
1496 pa_sink_unref(u
->sink
);
1498 if (u
->memchunk
.memblock
)
1499 pa_memblock_unref(u
->memchunk
.memblock
);
1501 if (u
->alsa_rtpoll_item
)
1502 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
1505 pa_rtpoll_free(u
->rtpoll
);
1508 pa_alsa_fdlist_free(u
->mixer_fdl
);
1510 if (u
->mixer_handle
)
1511 snd_mixer_close(u
->mixer_handle
);
1513 if (u
->pcm_handle
) {
1514 snd_pcm_drop(u
->pcm_handle
);
1515 snd_pcm_close(u
->pcm_handle
);
1519 pa_smoother_free(u
->smoother
);
1521 pa_xfree(u
->device_name
);
1524 snd_config_update_free_global();
1526 pa_alsa_redirect_errors_dec();