4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
7 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
9 PulseAudio is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published
11 by the Free Software Foundation; either version 2 of the License,
12 or (at your option) any later version.
14 PulseAudio is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with PulseAudio; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
32 #include <asoundlib.h>
34 #include <pulse/xmalloc.h>
35 #include <pulse/util.h>
37 #include <pulsecore/core-error.h>
38 #include <pulsecore/core.h>
39 #include <pulsecore/module.h>
40 #include <pulsecore/memchunk.h>
41 #include <pulsecore/sink.h>
42 #include <pulsecore/modargs.h>
43 #include <pulsecore/core-util.h>
44 #include <pulsecore/sample-util.h>
45 #include <pulsecore/log.h>
46 #include <pulsecore/macro.h>
47 #include <pulsecore/thread.h>
48 #include <pulsecore/core-error.h>
49 #include <pulsecore/thread-mq.h>
50 #include <pulsecore/rtpoll.h>
52 #include "alsa-util.h"
53 #include "module-alsa-source-symdef.h"
55 PA_MODULE_AUTHOR("Lennart Poettering")
56 PA_MODULE_DESCRIPTION("ALSA Source")
57 PA_MODULE_VERSION(PACKAGE_VERSION
)
59 "source_name=<name for the source> "
60 "device=<ALSA device> "
61 "format=<sample format> "
62 "channels=<number of channels> "
64 "fragments=<number of fragments> "
65 "fragment_size=<fragment size> "
66 "channel_map=<channel map> "
67 "mmap=<enable memory mapping?>")
69 #define DEFAULT_DEVICE "default"
77 pa_thread_mq thread_mq
;
80 snd_pcm_t
*pcm_handle
;
82 pa_alsa_fdlist
*mixer_fdl
;
83 snd_mixer_t
*mixer_handle
;
84 snd_mixer_elem_t
*mixer_elem
;
85 long hw_volume_max
, hw_volume_min
;
87 size_t frame_size
, fragment_size
, hwbuf_size
;
94 pa_rtpoll_item
*alsa_rtpoll_item
;
97 static const char* const valid_modargs
[] = {
110 static int mmap_read(struct userdata
*u
) {
114 pa_source_assert_ref(u
->source
);
119 const snd_pcm_channel_area_t
*areas
;
120 snd_pcm_uframes_t offset
, frames
;
124 if ((n
= snd_pcm_avail_update(u
->pcm_handle
)) < 0) {
127 pa_log_debug("snd_pcm_avail_update: Buffer underrun!");
129 if ((err
= snd_pcm_recover(u
->pcm_handle
, n
, 1)) == 0)
135 pa_log("snd_pcm_avail_update: %s", snd_strerror(err
));
139 /* pa_log("Got request for %i samples", (int) n); */
146 if ((err
= snd_pcm_mmap_begin(u
->pcm_handle
, &areas
, &offset
, &frames
)) < 0) {
149 pa_log_debug("snd_pcm_mmap_begin: Buffer underrun!");
151 if ((err
= snd_pcm_recover(u
->pcm_handle
, err
, 1)) == 0)
157 pa_log("Failed to write data to DSP: %s", snd_strerror(err
));
161 /* Check these are multiples of 8 bit */
162 pa_assert((areas
[0].first
& 7) == 0);
163 pa_assert((areas
[0].step
& 7)== 0);
165 /* We assume a single interleaved memory buffer */
166 pa_assert((areas
[0].first
>> 3) == 0);
167 pa_assert((areas
[0].step
>> 3) == u
->frame_size
);
169 p
= (uint8_t*) areas
[0].addr
+ (offset
* u
->frame_size
);
171 chunk
.memblock
= pa_memblock_new_fixed(u
->core
->mempool
, p
, frames
* u
->frame_size
, 1);
172 chunk
.length
= pa_memblock_get_length(chunk
.memblock
);
175 pa_source_post(u
->source
, &chunk
);
177 /* FIXME: Maybe we can do something to keep this memory block
178 * a little bit longer around? */
179 pa_memblock_unref_fixed(chunk
.memblock
);
181 if ((err
= snd_pcm_mmap_commit(u
->pcm_handle
, offset
, frames
)) < 0) {
184 pa_log_debug("snd_pcm_mmap_commit: Buffer underrun!");
186 if ((err
= snd_pcm_recover(u
->pcm_handle
, err
, 1)) == 0)
192 pa_log("Failed to write data to DSP: %s", snd_strerror(err
));
198 /* pa_log("wrote %i samples", (int) frames); */
202 static int unix_read(struct userdata
*u
) {
203 snd_pcm_status_t
*status
;
206 snd_pcm_status_alloca(&status
);
209 pa_source_assert_ref(u
->source
);
213 snd_pcm_sframes_t t
, k
;
218 if ((err
= snd_pcm_status(u
->pcm_handle
, status
)) < 0) {
219 pa_log("Failed to query DSP status data: %s", snd_strerror(err
));
223 if (snd_pcm_status_get_avail_max(status
)*u
->frame_size
>= u
->hwbuf_size
)
224 pa_log_debug("Buffer overrun!");
226 l
= snd_pcm_status_get_avail(status
) * u
->frame_size
;
231 chunk
.memblock
= pa_memblock_new(u
->core
->mempool
, (size_t) -1);
233 k
= pa_memblock_get_length(chunk
.memblock
);
238 k
= (k
/u
->frame_size
)*u
->frame_size
;
240 p
= pa_memblock_acquire(chunk
.memblock
);
241 t
= snd_pcm_readi(u
->pcm_handle
, (uint8_t*) p
, k
/ u
->frame_size
);
242 pa_memblock_release(chunk
.memblock
);
244 /* pa_log("wrote %i bytes of %u (%u)", t*u->frame_size, u->memchunk.length, l); */
249 pa_memblock_unref(chunk
.memblock
);
251 if ((t
= snd_pcm_recover(u
->pcm_handle
, t
, 1)) == 0)
255 pa_log_debug("EAGAIN");
258 pa_log("Failed to read data from DSP: %s", snd_strerror(t
));
264 chunk
.length
= t
* u
->frame_size
;
266 pa_source_post(u
->source
, &chunk
);
267 pa_memblock_unref(chunk
.memblock
);
271 if (t
* u
->frame_size
>= (unsigned) l
)
276 static pa_usec_t
source_get_latency(struct userdata
*u
) {
278 snd_pcm_status_t
*status
;
279 snd_pcm_sframes_t frames
= 0;
282 snd_pcm_status_alloca(&status
);
285 pa_assert(u
->pcm_handle
);
287 if ((err
= snd_pcm_status(u
->pcm_handle
, status
)) < 0)
288 pa_log("Failed to get delay: %s", snd_strerror(err
));
290 frames
= snd_pcm_status_get_delay(status
);
293 r
= pa_bytes_to_usec(frames
* u
->frame_size
, &u
->source
->sample_spec
);
298 static int build_pollfd(struct userdata
*u
) {
300 struct pollfd
*pollfd
;
304 pa_assert(u
->pcm_handle
);
306 if ((n
= snd_pcm_poll_descriptors_count(u
->pcm_handle
)) < 0) {
307 pa_log("snd_pcm_poll_descriptors_count() failed: %s", snd_strerror(n
));
311 if (u
->alsa_rtpoll_item
)
312 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
314 u
->alsa_rtpoll_item
= pa_rtpoll_item_new(u
->rtpoll
, n
);
315 pollfd
= pa_rtpoll_item_get_pollfd(u
->alsa_rtpoll_item
, NULL
);
317 if ((err
= snd_pcm_poll_descriptors(u
->pcm_handle
, pollfd
, n
)) < 0) {
318 pa_log("snd_pcm_poll_descriptors() failed: %s", snd_strerror(err
));
325 static int suspend(struct userdata
*u
) {
327 pa_assert(u
->pcm_handle
);
330 snd_pcm_close(u
->pcm_handle
);
331 u
->pcm_handle
= NULL
;
333 if (u
->alsa_rtpoll_item
) {
334 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
335 u
->alsa_rtpoll_item
= NULL
;
338 pa_log_info("Device suspended...");
343 static int unsuspend(struct userdata
*u
) {
347 snd_pcm_uframes_t period_size
;
350 pa_assert(!u
->pcm_handle
);
352 pa_log_info("Trying resume...");
354 snd_config_update_free_global();
355 if ((err
= snd_pcm_open(&u
->pcm_handle
, u
->device_name
, SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
)) < 0) {
356 pa_log("Error opening PCM device %s: %s", u
->device_name
, snd_strerror(err
));
360 ss
= u
->source
->sample_spec
;
361 nfrags
= u
->nfragments
;
362 period_size
= u
->fragment_size
/ u
->frame_size
;
365 if ((err
= pa_alsa_set_hw_params(u
->pcm_handle
, &ss
, &nfrags
, &period_size
, &b
)) < 0) {
366 pa_log("Failed to set hardware parameters: %s", snd_strerror(err
));
370 if (b
!= u
->use_mmap
) {
371 pa_log_warn("Resume failed, couldn't get original access mode.");
375 if (!pa_sample_spec_equal(&ss
, &u
->source
->sample_spec
)) {
376 pa_log_warn("Resume failed, couldn't restore original sample settings.");
380 if (nfrags
!= u
->nfragments
|| period_size
*u
->frame_size
!= u
->fragment_size
) {
381 pa_log_warn("Resume failed, couldn't restore original fragment settings.");
385 if ((err
= pa_alsa_set_sw_params(u
->pcm_handle
)) < 0) {
386 pa_log("Failed to set software parameters: %s", snd_strerror(err
));
390 if (build_pollfd(u
) < 0)
393 snd_pcm_start(u
->pcm_handle
);
395 /* FIXME: We need to reload the volume somehow */
397 pa_log_info("Resumed successfully...");
403 snd_pcm_close(u
->pcm_handle
);
404 u
->pcm_handle
= NULL
;
410 static int source_process_msg(pa_msgobject
*o
, int code
, void *data
, int64_t offset
, pa_memchunk
*chunk
) {
411 struct userdata
*u
= PA_SOURCE(o
)->userdata
;
415 case PA_SOURCE_MESSAGE_GET_LATENCY
: {
419 r
= source_get_latency(u
);
421 *((pa_usec_t
*) data
) = r
;
426 case PA_SOURCE_MESSAGE_SET_STATE
:
428 switch ((pa_source_state_t
) PA_PTR_TO_UINT(data
)) {
430 case PA_SOURCE_SUSPENDED
:
431 pa_assert(PA_SOURCE_OPENED(u
->source
->thread_info
.state
));
439 case PA_SOURCE_RUNNING
:
441 if (u
->source
->thread_info
.state
== PA_SOURCE_SUSPENDED
) {
442 if (unsuspend(u
) < 0)
448 case PA_SOURCE_UNLINKED
:
456 return pa_source_process_msg(o
, code
, data
, offset
, chunk
);
459 static int mixer_callback(snd_mixer_elem_t
*elem
, unsigned int mask
) {
460 struct userdata
*u
= snd_mixer_elem_get_callback_private(elem
);
463 pa_assert(u
->mixer_handle
);
465 if (mask
== SND_CTL_EVENT_MASK_REMOVE
)
468 if (mask
& SND_CTL_EVENT_MASK_VALUE
) {
469 pa_source_get_volume(u
->source
);
470 pa_source_get_mute(u
->source
);
476 static int source_get_volume_cb(pa_source
*s
) {
477 struct userdata
*u
= s
->userdata
;
482 pa_assert(u
->mixer_elem
);
484 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
487 pa_assert(snd_mixer_selem_has_capture_channel(u
->mixer_elem
, i
));
489 if ((err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, i
, &vol
)) < 0)
492 set_vol
= (long) roundf(((float) s
->volume
.values
[i
] * (u
->hw_volume_max
- u
->hw_volume_min
)) / PA_VOLUME_NORM
) + u
->hw_volume_min
;
494 /* Try to avoid superfluous volume changes */
496 s
->volume
.values
[i
] = (pa_volume_t
) roundf(((float) (vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
) / (u
->hw_volume_max
- u
->hw_volume_min
));
502 pa_log_error("Unable to read volume: %s", snd_strerror(err
));
504 s
->get_volume
= NULL
;
505 s
->set_volume
= NULL
;
509 static int source_set_volume_cb(pa_source
*s
) {
510 struct userdata
*u
= s
->userdata
;
515 pa_assert(u
->mixer_elem
);
517 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
521 pa_assert(snd_mixer_selem_has_capture_channel(u
->mixer_elem
, i
));
523 vol
= s
->volume
.values
[i
];
525 if (vol
> PA_VOLUME_NORM
)
526 vol
= PA_VOLUME_NORM
;
528 alsa_vol
= (long) roundf(((float) vol
* (u
->hw_volume_max
- u
->hw_volume_min
)) / PA_VOLUME_NORM
) + u
->hw_volume_min
;
530 if ((err
= snd_mixer_selem_set_capture_volume(u
->mixer_elem
, i
, alsa_vol
)) < 0)
537 pa_log_error("Unable to set volume: %s", snd_strerror(err
));
539 s
->get_volume
= NULL
;
540 s
->set_volume
= NULL
;
544 static int source_get_mute_cb(pa_source
*s
) {
545 struct userdata
*u
= s
->userdata
;
549 pa_assert(u
->mixer_elem
);
551 if ((err
= snd_mixer_selem_get_capture_switch(u
->mixer_elem
, 0, &sw
)) < 0) {
552 pa_log_error("Unable to get switch: %s", snd_strerror(err
));
564 static int source_set_mute_cb(pa_source
*s
) {
565 struct userdata
*u
= s
->userdata
;
569 pa_assert(u
->mixer_elem
);
571 if ((err
= snd_mixer_selem_set_capture_switch_all(u
->mixer_elem
, !s
->muted
)) < 0) {
572 pa_log_error("Unable to set switch: %s", snd_strerror(err
));
582 static void thread_func(void *userdata
) {
583 struct userdata
*u
= userdata
;
587 pa_log_debug("Thread starting up");
589 if (u
->core
->high_priority
)
592 pa_thread_mq_install(&u
->thread_mq
);
593 pa_rtpoll_install(u
->rtpoll
);
595 if (build_pollfd(u
) < 0)
598 snd_pcm_start(u
->pcm_handle
);
603 /* Read some data and pass it to the sources */
604 if (PA_SOURCE_OPENED(u
->source
->thread_info
.state
)) {
607 if (mmap_read(u
) < 0)
611 if (unix_read(u
) < 0)
616 /* Now give the source outputs some to time to process their data */
617 if ((ret
= pa_source_process_outputs(u
->source
)) < 0)
622 /* Check whether there is a message for us to process */
623 if ((ret
= pa_thread_mq_process(&u
->thread_mq
) < 0))
628 /* Hmm, nothing to do. Let's sleep */
629 if (pa_rtpoll_run(u
->rtpoll
) < 0) {
630 pa_log("poll() failed: %s", pa_cstrerror(errno
));
634 /* Tell ALSA about this and process its response */
635 if (PA_SOURCE_OPENED(u
->source
->thread_info
.state
)) {
636 struct pollfd
*pollfd
;
637 unsigned short revents
= 0;
641 pollfd
= pa_rtpoll_item_get_pollfd(u
->alsa_rtpoll_item
, &n
);
643 if ((err
= snd_pcm_poll_descriptors_revents(u
->pcm_handle
, pollfd
, n
, &revents
)) < 0) {
644 pa_log("snd_pcm_poll_descriptors_revents() failed: %s", snd_strerror(err
));
648 if (revents
& (POLLERR
|POLLNVAL
|POLLHUP
)) {
649 if (revents
& POLLERR
)
650 pa_log_warn("Got POLLERR from ALSA");
651 if (revents
& POLLNVAL
)
652 pa_log_warn("Got POLLNVAL from ALSA");
653 if (revents
& POLLHUP
)
654 pa_log_warn("Got POLLHUP from ALSA");
662 /* We have to continue processing messages until we receive the
663 * SHUTDOWN message */
664 pa_asyncmsgq_post(u
->thread_mq
.outq
, PA_MSGOBJECT(u
->core
), PA_CORE_MESSAGE_UNLOAD_MODULE
, u
->module
, 0, NULL
, NULL
);
665 pa_asyncmsgq_wait_for(u
->thread_mq
.inq
, PA_MESSAGE_SHUTDOWN
);
668 pa_log_debug("Thread shutting down");
671 int pa__init(pa_module
*m
) {
673 pa_modargs
*ma
= NULL
;
674 struct userdata
*u
= NULL
;
678 unsigned nfrags
, frag_size
;
679 snd_pcm_uframes_t period_size
;
681 snd_pcm_info_t
*pcm_info
= NULL
;
685 char *name_buf
= NULL
;
689 snd_pcm_info_alloca(&pcm_info
);
693 if (!(ma
= pa_modargs_new(m
->argument
, valid_modargs
))) {
694 pa_log("Failed to parse module arguments");
698 ss
= m
->core
->default_sample_spec
;
699 if (pa_modargs_get_sample_spec_and_channel_map(ma
, &ss
, &map
, PA_CHANNEL_MAP_ALSA
) < 0) {
700 pa_log("Failed to parse sample specification");
704 frame_size
= pa_frame_size(&ss
);
706 nfrags
= m
->core
->default_n_fragments
;
707 frag_size
= pa_usec_to_bytes(m
->core
->default_fragment_size_msec
*1000, &ss
);
709 frag_size
= frame_size
;
711 if (pa_modargs_get_value_u32(ma
, "fragments", &nfrags
) < 0 || pa_modargs_get_value_u32(ma
, "fragment_size", &frag_size
) < 0) {
712 pa_log("Failed to parse buffer metrics");
715 period_size
= frag_size
/frame_size
;
717 if (pa_modargs_get_value_boolean(ma
, "mmap", &use_mmap
) < 0) {
718 pa_log("Failed to parse mmap argument.");
722 u
= pa_xnew0(struct userdata
, 1);
726 u
->use_mmap
= use_mmap
;
727 pa_thread_mq_init(&u
->thread_mq
, m
->core
->mainloop
);
728 u
->rtpoll
= pa_rtpoll_new();
729 u
->alsa_rtpoll_item
= NULL
;
730 pa_rtpoll_item_new_asyncmsgq(u
->rtpoll
, u
->thread_mq
.inq
);
732 snd_config_update_free_global();
733 if ((err
= snd_pcm_open(&u
->pcm_handle
, dev
= pa_modargs_get_value(ma
, "device", DEFAULT_DEVICE
), SND_PCM_STREAM_CAPTURE
, SND_PCM_NONBLOCK
)) < 0) {
734 pa_log("Error opening PCM device %s: %s", dev
, snd_strerror(err
));
738 u
->device_name
= pa_xstrdup(dev
);
740 if ((err
= snd_pcm_info(u
->pcm_handle
, pcm_info
)) < 0) {
741 pa_log("Error fetching PCM info: %s", snd_strerror(err
));
746 if ((err
= pa_alsa_set_hw_params(u
->pcm_handle
, &ss
, &nfrags
, &period_size
, &b
)) < 0) {
747 pa_log("Failed to set hardware parameters: %s", snd_strerror(err
));
751 if (use_mmap
&& !b
) {
752 pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode.");
753 u
->use_mmap
= use_mmap
= b
;
757 pa_log_info("Successfully enabled mmap() mode.");
759 if ((err
= pa_alsa_set_sw_params(u
->pcm_handle
)) < 0) {
760 pa_log("Failed to set software parameters: %s", snd_strerror(err
));
764 /* ALSA might tweak the sample spec, so recalculate the frame size */
765 frame_size
= pa_frame_size(&ss
);
767 if (ss
.channels
!= map
.channels
)
768 /* Seems ALSA didn't like the channel number, so let's fix the channel map */
769 pa_channel_map_init_auto(&map
, ss
.channels
, PA_CHANNEL_MAP_ALSA
);
771 if ((err
= snd_mixer_open(&u
->mixer_handle
, 0)) < 0)
772 pa_log("Error opening mixer: %s", snd_strerror(err
));
775 if ((pa_alsa_prepare_mixer(u
->mixer_handle
, dev
) < 0) ||
776 !(u
->mixer_elem
= pa_alsa_find_elem(u
->mixer_handle
, "Capture", NULL
))) {
777 snd_mixer_close(u
->mixer_handle
);
778 u
->mixer_handle
= NULL
;
782 if ((name
= pa_modargs_get_value(ma
, "source_name", NULL
)))
785 name
= name_buf
= pa_sprintf_malloc("alsa_input.%s", dev
);
789 u
->source
= pa_source_new(m
->core
, __FILE__
, name
, namereg_fail
, &ss
, &map
);
793 pa_log("Failed to create source object");
797 u
->source
->parent
.process_msg
= source_process_msg
;
798 u
->source
->userdata
= u
;
800 pa_source_set_module(u
->source
, m
);
801 pa_source_set_asyncmsgq(u
->source
, u
->thread_mq
.inq
);
802 pa_source_set_rtpoll(u
->source
, u
->rtpoll
);
803 pa_source_set_description(u
->source
, t
= pa_sprintf_malloc(
804 "ALSA PCM on %s (%s)%s",
806 snd_pcm_info_get_name(pcm_info
),
807 use_mmap
? " via DMA" : ""));
810 u
->source
->flags
= PA_SOURCE_HARDWARE
|PA_SOURCE_CAN_SUSPEND
|PA_SOURCE_LATENCY
|PA_SOURCE_HW_VOLUME_CTRL
;
812 u
->frame_size
= frame_size
;
813 u
->fragment_size
= frag_size
= period_size
* frame_size
;
814 u
->nfragments
= nfrags
;
815 u
->hwbuf_size
= u
->fragment_size
* nfrags
;
817 pa_log_info("Using %u fragments of size %lu bytes.", nfrags
, (long unsigned) u
->fragment_size
);
819 if (u
->mixer_handle
) {
820 assert(u
->mixer_elem
);
822 if (snd_mixer_selem_has_capture_volume(u
->mixer_elem
)) {
825 for (i
= 0;i
< ss
.channels
;i
++) {
826 if (!snd_mixer_selem_has_capture_channel(u
->mixer_elem
, i
))
830 if (i
== ss
.channels
) {
831 u
->source
->get_volume
= source_get_volume_cb
;
832 u
->source
->set_volume
= source_set_volume_cb
;
833 snd_mixer_selem_get_capture_volume_range(u
->mixer_elem
, &u
->hw_volume_min
, &u
->hw_volume_max
);
837 if (snd_mixer_selem_has_capture_switch(u
->mixer_elem
)) {
838 u
->source
->get_mute
= source_get_mute_cb
;
839 u
->source
->set_mute
= source_set_mute_cb
;
842 u
->mixer_fdl
= pa_alsa_fdlist_new();
844 if (pa_alsa_fdlist_set_mixer(u
->mixer_fdl
, u
->mixer_handle
, m
->core
->mainloop
) < 0) {
845 pa_log("failed to initialise file descriptor monitoring");
849 snd_mixer_elem_set_callback(u
->mixer_elem
, mixer_callback
);
850 snd_mixer_elem_set_callback_private(u
->mixer_elem
, u
);
854 if (!(u
->thread
= pa_thread_new(thread_func
, u
))) {
855 pa_log("Failed to create thread.");
858 /* Get initial mixer settings */
859 if (u
->source
->get_volume
)
860 u
->source
->get_volume(u
->source
);
861 if (u
->source
->get_mute
)
862 u
->source
->get_mute(u
->source
);
864 pa_source_put(u
->source
);
880 void pa__done(pa_module
*m
) {
885 if (!(u
= m
->userdata
))
889 pa_source_unlink(u
->source
);
892 pa_asyncmsgq_send(u
->thread_mq
.inq
, NULL
, PA_MESSAGE_SHUTDOWN
, NULL
, 0, NULL
);
893 pa_thread_free(u
->thread
);
896 pa_thread_mq_done(&u
->thread_mq
);
899 pa_source_unref(u
->source
);
901 if (u
->alsa_rtpoll_item
)
902 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
905 pa_rtpoll_free(u
->rtpoll
);
908 pa_alsa_fdlist_free(u
->mixer_fdl
);
911 snd_mixer_close(u
->mixer_handle
);
914 snd_pcm_drop(u
->pcm_handle
);
915 snd_pcm_close(u
->pcm_handle
);
918 pa_xfree(u
->device_name
);
921 snd_config_update_free_global();