2 This file is part of PulseAudio.
4 Copyright 2004-2008 Lennart Poettering
5 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2 of the License,
10 or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #include <asoundlib.h>
31 #ifdef HAVE_VALGRIND_MEMCHECK_H
32 #include <valgrind/memcheck.h>
35 #include <pulse/xmalloc.h>
36 #include <pulse/util.h>
37 #include <pulse/timeval.h>
39 #include <pulsecore/core-error.h>
40 #include <pulsecore/core.h>
41 #include <pulsecore/module.h>
42 #include <pulsecore/memchunk.h>
43 #include <pulsecore/sink.h>
44 #include <pulsecore/modargs.h>
45 #include <pulsecore/core-util.h>
46 #include <pulsecore/sample-util.h>
47 #include <pulsecore/log.h>
48 #include <pulsecore/macro.h>
49 #include <pulsecore/thread.h>
50 #include <pulsecore/core-error.h>
51 #include <pulsecore/thread-mq.h>
52 #include <pulsecore/rtpoll.h>
53 #include <pulsecore/time-smoother.h>
54 #include <pulsecore/rtclock.h>
56 #include "alsa-util.h"
57 #include "alsa-source.h"
59 #define DEFAULT_DEVICE "default"
60 #define DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s */
61 #define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms */
62 #define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
63 #define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
71 pa_thread_mq thread_mq
;
74 snd_pcm_t
*pcm_handle
;
76 pa_alsa_fdlist
*mixer_fdl
;
77 snd_mixer_t
*mixer_handle
;
78 snd_mixer_elem_t
*mixer_elem
;
79 long hw_volume_max
, hw_volume_min
;
80 long hw_dB_max
, hw_dB_min
;
81 pa_bool_t hw_dB_supported
;
82 pa_bool_t mixer_seperate_channels
;
84 pa_cvolume hardware_volume
;
86 size_t frame_size
, fragment_size
, hwbuf_size
, tsched_watermark
;
91 pa_bool_t use_mmap
, use_tsched
;
93 pa_rtpoll_item
*alsa_rtpoll_item
;
95 snd_mixer_selem_channel_id_t mixer_map
[SND_MIXER_SCHN_LAST
];
97 pa_smoother
*smoother
;
100 snd_pcm_sframes_t hwbuf_unused_frames
;
103 static void userdata_free(struct userdata
*u
);
105 static void fix_tsched_watermark(struct userdata
*u
) {
107 size_t min_sleep
, min_wakeup
;
110 max_use
= u
->hwbuf_size
- (size_t) u
->hwbuf_unused_frames
* u
->frame_size
;
112 min_sleep
= pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC
, &u
->source
->sample_spec
);
113 min_wakeup
= pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC
, &u
->source
->sample_spec
);
115 if (min_sleep
> max_use
/2)
116 min_sleep
= pa_frame_align(max_use
/2, &u
->source
->sample_spec
);
117 if (min_sleep
< u
->frame_size
)
118 min_sleep
= u
->frame_size
;
120 if (min_wakeup
> max_use
/2)
121 min_wakeup
= pa_frame_align(max_use
/2, &u
->source
->sample_spec
);
122 if (min_wakeup
< u
->frame_size
)
123 min_wakeup
= u
->frame_size
;
125 if (u
->tsched_watermark
> max_use
-min_sleep
)
126 u
->tsched_watermark
= max_use
-min_sleep
;
128 if (u
->tsched_watermark
< min_wakeup
)
129 u
->tsched_watermark
= min_wakeup
;
132 static pa_usec_t
hw_sleep_time(struct userdata
*u
, pa_usec_t
*sleep_usec
, pa_usec_t
*process_usec
) {
137 usec
= pa_source_get_requested_latency_within_thread(u
->source
);
139 if (usec
== (pa_usec_t
) -1)
140 usec
= pa_bytes_to_usec(u
->hwbuf_size
, &u
->source
->sample_spec
);
142 /* pa_log_debug("hw buffer time: %u ms", (unsigned) (usec / PA_USEC_PER_MSEC)); */
144 wm
= pa_bytes_to_usec(u
->tsched_watermark
, &u
->source
->sample_spec
);
147 *sleep_usec
= usec
- wm
;
150 *process_usec
= *sleep_usec
= usec
/= 2;
152 /* pa_log_debug("after watermark: %u ms", (unsigned) (*sleep_usec / PA_USEC_PER_MSEC)); */
157 static int try_recover(struct userdata
*u
, const char *call
, int err
) {
162 pa_log_debug("%s: %s", call
, snd_strerror(err
));
164 pa_assert(err
!= -EAGAIN
);
167 pa_log_debug("%s: Buffer overrun!", call
);
169 if ((err
= snd_pcm_recover(u
->pcm_handle
, err
, 1)) == 0) {
170 snd_pcm_start(u
->pcm_handle
);
174 pa_log("%s: %s", call
, snd_strerror(err
));
178 static size_t check_left_to_record(struct userdata
*u
, snd_pcm_sframes_t n
) {
179 size_t left_to_record
;
180 size_t rec_space
= u
->hwbuf_size
- (size_t) u
->hwbuf_unused_frames
*u
->frame_size
;
182 if ((size_t) n
*u
->frame_size
< rec_space
)
183 left_to_record
= rec_space
- ((size_t) n
*u
->frame_size
);
187 if (left_to_record
> 0) {
188 /* pa_log_debug("%0.2f ms left to record", (double) pa_bytes_to_usec(left_to_record, &u->source->sample_spec) / PA_USEC_PER_MSEC); */
190 pa_log_info("Overrun!");
193 size_t old_watermark
= u
->tsched_watermark
;
195 u
->tsched_watermark
*= 2;
196 fix_tsched_watermark(u
);
198 if (old_watermark
!= u
->tsched_watermark
)
199 pa_log_notice("Increasing wakeup watermark to %0.2f ms",
200 (double) pa_bytes_to_usec(u
->tsched_watermark
, &u
->source
->sample_spec
) / PA_USEC_PER_MSEC
);
204 return left_to_record
;
207 static int mmap_read(struct userdata
*u
, pa_usec_t
*sleep_usec
, pa_bool_t polled
) {
209 pa_usec_t max_sleep_usec
= 0, process_usec
= 0;
210 size_t left_to_record
;
213 pa_source_assert_ref(u
->source
);
216 hw_sleep_time(u
, &max_sleep_usec
, &process_usec
);
222 snd_pcm_hwsync(u
->pcm_handle
);
224 if (PA_UNLIKELY((n
= pa_alsa_safe_avail_update(u
->pcm_handle
, u
->hwbuf_size
, &u
->source
->sample_spec
)) < 0)) {
226 if ((r
= try_recover(u
, "snd_pcm_avail_update", (int) n
)) == 0)
232 left_to_record
= check_left_to_record(u
, n
);
236 pa_bytes_to_usec(left_to_record
, &u
->source
->sample_spec
) > process_usec
+max_sleep_usec
/2)
239 if (PA_UNLIKELY(n
<= 0)) {
241 if (polled
&& pa_log_ratelimit())
242 pa_log("ALSA woke us up to read new data from the device, but there was actually nothing to read! "
243 "Most likely this is an ALSA driver bug. Please report this issue to the ALSA developers. "
244 "We were woken up with POLLIN set -- however a subsequent snd_pcm_avail_update() returned 0.");
253 const snd_pcm_channel_area_t
*areas
;
254 snd_pcm_uframes_t offset
, frames
= (snd_pcm_uframes_t
) n
;
257 snd_pcm_sframes_t sframes
;
259 /* pa_log_debug("%lu frames to read", (unsigned long) frames); */
261 if (PA_UNLIKELY((err
= pa_alsa_safe_mmap_begin(u
->pcm_handle
, &areas
, &offset
, &frames
, u
->hwbuf_size
, &u
->source
->sample_spec
)) < 0)) {
263 if ((r
= try_recover(u
, "snd_pcm_mmap_begin", err
)) == 0)
269 /* Make sure that if these memblocks need to be copied they will fit into one slot */
270 if (frames
> pa_mempool_block_size_max(u
->source
->core
->mempool
)/u
->frame_size
)
271 frames
= pa_mempool_block_size_max(u
->source
->core
->mempool
)/u
->frame_size
;
273 /* Check these are multiples of 8 bit */
274 pa_assert((areas
[0].first
& 7) == 0);
275 pa_assert((areas
[0].step
& 7)== 0);
277 /* We assume a single interleaved memory buffer */
278 pa_assert((areas
[0].first
>> 3) == 0);
279 pa_assert((areas
[0].step
>> 3) == u
->frame_size
);
281 p
= (uint8_t*) areas
[0].addr
+ (offset
* u
->frame_size
);
283 chunk
.memblock
= pa_memblock_new_fixed(u
->core
->mempool
, p
, frames
* u
->frame_size
, TRUE
);
284 chunk
.length
= pa_memblock_get_length(chunk
.memblock
);
287 pa_source_post(u
->source
, &chunk
);
288 pa_memblock_unref_fixed(chunk
.memblock
);
290 if (PA_UNLIKELY((sframes
= snd_pcm_mmap_commit(u
->pcm_handle
, offset
, frames
)) < 0)) {
292 if ((r
= try_recover(u
, "snd_pcm_mmap_commit", (int) sframes
)) == 0)
300 u
->frame_index
+= (int64_t) frames
;
302 /* pa_log_debug("read %lu frames", (unsigned long) frames); */
304 if (frames
>= (snd_pcm_uframes_t
) n
)
307 n
-= (snd_pcm_sframes_t
) frames
;
311 *sleep_usec
= pa_bytes_to_usec(left_to_record
, &u
->source
->sample_spec
) - process_usec
;
315 static int unix_read(struct userdata
*u
, pa_usec_t
*sleep_usec
, pa_bool_t polled
) {
317 pa_usec_t max_sleep_usec
= 0, process_usec
= 0;
318 size_t left_to_record
;
321 pa_source_assert_ref(u
->source
);
324 hw_sleep_time(u
, &max_sleep_usec
, &process_usec
);
330 snd_pcm_hwsync(u
->pcm_handle
);
332 if (PA_UNLIKELY((n
= pa_alsa_safe_avail_update(u
->pcm_handle
, u
->hwbuf_size
, &u
->source
->sample_spec
)) < 0)) {
334 if ((r
= try_recover(u
, "snd_pcm_avail_update", (int) n
)) == 0)
340 left_to_record
= check_left_to_record(u
, n
);
344 pa_bytes_to_usec(left_to_record
, &u
->source
->sample_spec
) > process_usec
+max_sleep_usec
/2)
347 if (PA_UNLIKELY(n
<= 0)) {
349 if (polled
&& pa_log_ratelimit())
350 pa_log("ALSA woke us up to read new data from the device, but there was actually nothing to read! "
351 "Most likely this is an ALSA driver bug. Please report this issue to the ALSA developers. "
352 "We were woken up with POLLIN set -- however a subsequent snd_pcm_avail_update() returned 0.");
361 snd_pcm_sframes_t frames
;
364 chunk
.memblock
= pa_memblock_new(u
->core
->mempool
, (size_t) -1);
366 frames
= (snd_pcm_sframes_t
) (pa_memblock_get_length(chunk
.memblock
) / u
->frame_size
);
371 /* pa_log_debug("%lu frames to read", (unsigned long) n); */
373 p
= pa_memblock_acquire(chunk
.memblock
);
374 frames
= snd_pcm_readi(u
->pcm_handle
, (uint8_t*) p
, (snd_pcm_uframes_t
) frames
);
375 pa_memblock_release(chunk
.memblock
);
377 pa_assert(frames
!= 0);
379 if (PA_UNLIKELY(frames
< 0)) {
380 pa_memblock_unref(chunk
.memblock
);
382 if ((r
= try_recover(u
, "snd_pcm_readi", (int) (frames
))) == 0)
389 chunk
.length
= (size_t) frames
* u
->frame_size
;
391 pa_source_post(u
->source
, &chunk
);
392 pa_memblock_unref(chunk
.memblock
);
396 u
->frame_index
+= frames
;
398 /* pa_log_debug("read %lu frames", (unsigned long) frames); */
407 *sleep_usec
= pa_bytes_to_usec(left_to_record
, &u
->source
->sample_spec
) - process_usec
;
411 static void update_smoother(struct userdata
*u
) {
412 snd_pcm_sframes_t delay
= 0;
415 pa_usec_t now1
, now2
;
418 pa_assert(u
->pcm_handle
);
420 /* Let's update the time smoother */
422 snd_pcm_hwsync(u
->pcm_handle
);
423 snd_pcm_avail_update(u
->pcm_handle
);
425 if (PA_UNLIKELY((err
= snd_pcm_delay(u
->pcm_handle
, &delay
)) < 0)) {
426 pa_log_warn("Failed to get delay: %s", snd_strerror(err
));
430 frames
= u
->frame_index
+ delay
;
432 now1
= pa_rtclock_usec();
433 now2
= pa_bytes_to_usec((uint64_t) frames
* u
->frame_size
, &u
->source
->sample_spec
);
435 pa_smoother_put(u
->smoother
, now1
, now2
);
438 static pa_usec_t
source_get_latency(struct userdata
*u
) {
441 pa_usec_t now1
, now2
;
445 now1
= pa_rtclock_usec();
446 now2
= pa_smoother_get(u
->smoother
, now1
);
448 delay
= (int64_t) now2
- (int64_t) pa_bytes_to_usec((uint64_t) u
->frame_index
* u
->frame_size
, &u
->source
->sample_spec
);
451 r
= (pa_usec_t
) delay
;
456 static int build_pollfd(struct userdata
*u
) {
458 pa_assert(u
->pcm_handle
);
460 if (u
->alsa_rtpoll_item
)
461 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
463 if (!(u
->alsa_rtpoll_item
= pa_alsa_build_pollfd(u
->pcm_handle
, u
->rtpoll
)))
469 static int suspend(struct userdata
*u
) {
471 pa_assert(u
->pcm_handle
);
473 pa_smoother_pause(u
->smoother
, pa_rtclock_usec());
476 snd_pcm_close(u
->pcm_handle
);
477 u
->pcm_handle
= NULL
;
479 if (u
->alsa_rtpoll_item
) {
480 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
481 u
->alsa_rtpoll_item
= NULL
;
484 pa_log_info("Device suspended...");
489 static int update_sw_params(struct userdata
*u
) {
490 snd_pcm_uframes_t avail_min
;
495 /* Use the full buffer if noone asked us for anything specific */
496 u
->hwbuf_unused_frames
= 0;
501 if ((latency
= pa_source_get_requested_latency_within_thread(u
->source
)) != (pa_usec_t
) -1) {
504 pa_log_debug("latency set to %0.2fms", (double) latency
/ PA_USEC_PER_MSEC
);
506 b
= pa_usec_to_bytes(latency
, &u
->source
->sample_spec
);
508 /* We need at least one sample in our buffer */
510 if (PA_UNLIKELY(b
< u
->frame_size
))
513 u
->hwbuf_unused_frames
= (snd_pcm_sframes_t
)
514 (PA_LIKELY(b
< u
->hwbuf_size
) ?
515 ((u
->hwbuf_size
- b
) / u
->frame_size
) : 0);
518 fix_tsched_watermark(u
);
521 pa_log_debug("hwbuf_unused_frames=%lu", (unsigned long) u
->hwbuf_unused_frames
);
526 pa_usec_t sleep_usec
, process_usec
;
528 hw_sleep_time(u
, &sleep_usec
, &process_usec
);
529 avail_min
+= pa_usec_to_bytes(sleep_usec
, &u
->source
->sample_spec
) / u
->frame_size
;
532 pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min
);
534 if ((err
= pa_alsa_set_sw_params(u
->pcm_handle
, avail_min
)) < 0) {
535 pa_log("Failed to set software parameters: %s", snd_strerror(err
));
542 static int unsuspend(struct userdata
*u
) {
547 snd_pcm_uframes_t period_size
;
550 pa_assert(!u
->pcm_handle
);
552 pa_log_info("Trying resume...");
554 snd_config_update_free_global();
556 if ((err
= snd_pcm_open(&u
->pcm_handle
, u
->device_name
, SND_PCM_STREAM_CAPTURE
,
557 /*SND_PCM_NONBLOCK|*/
558 SND_PCM_NO_AUTO_RESAMPLE
|
559 SND_PCM_NO_AUTO_CHANNELS
|
560 SND_PCM_NO_AUTO_FORMAT
)) < 0) {
561 pa_log("Error opening PCM device %s: %s", u
->device_name
, snd_strerror(err
));
565 ss
= u
->source
->sample_spec
;
566 nfrags
= u
->nfragments
;
567 period_size
= u
->fragment_size
/ u
->frame_size
;
571 if ((err
= pa_alsa_set_hw_params(u
->pcm_handle
, &ss
, &nfrags
, &period_size
, u
->hwbuf_size
/ u
->frame_size
, &b
, &d
, TRUE
)) < 0) {
572 pa_log("Failed to set hardware parameters: %s", snd_strerror(err
));
576 if (b
!= u
->use_mmap
|| d
!= u
->use_tsched
) {
577 pa_log_warn("Resume failed, couldn't get original access mode.");
581 if (!pa_sample_spec_equal(&ss
, &u
->source
->sample_spec
)) {
582 pa_log_warn("Resume failed, couldn't restore original sample settings.");
586 if (nfrags
!= u
->nfragments
|| period_size
*u
->frame_size
!= u
->fragment_size
) {
587 pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %lu*%lu, New %lu*%lu)",
588 (unsigned long) u
->nfragments
, (unsigned long) u
->fragment_size
,
589 (unsigned long) nfrags
, period_size
* u
->frame_size
);
593 if (update_sw_params(u
) < 0)
596 if (build_pollfd(u
) < 0)
599 /* FIXME: We need to reload the volume somehow */
601 snd_pcm_start(u
->pcm_handle
);
602 pa_smoother_resume(u
->smoother
, pa_rtclock_usec());
604 pa_log_info("Resumed successfully...");
610 snd_pcm_close(u
->pcm_handle
);
611 u
->pcm_handle
= NULL
;
617 static int source_process_msg(pa_msgobject
*o
, int code
, void *data
, int64_t offset
, pa_memchunk
*chunk
) {
618 struct userdata
*u
= PA_SOURCE(o
)->userdata
;
622 case PA_SOURCE_MESSAGE_GET_LATENCY
: {
626 r
= source_get_latency(u
);
628 *((pa_usec_t
*) data
) = r
;
633 case PA_SOURCE_MESSAGE_SET_STATE
:
635 switch ((pa_source_state_t
) PA_PTR_TO_UINT(data
)) {
637 case PA_SOURCE_SUSPENDED
:
638 pa_assert(PA_SOURCE_IS_OPENED(u
->source
->thread_info
.state
));
646 case PA_SOURCE_RUNNING
:
648 if (u
->source
->thread_info
.state
== PA_SOURCE_INIT
) {
649 if (build_pollfd(u
) < 0)
652 snd_pcm_start(u
->pcm_handle
);
655 if (u
->source
->thread_info
.state
== PA_SOURCE_SUSPENDED
) {
656 if (unsuspend(u
) < 0)
662 case PA_SOURCE_UNLINKED
:
664 case PA_SOURCE_INVALID_STATE
:
671 return pa_source_process_msg(o
, code
, data
, offset
, chunk
);
674 static int mixer_callback(snd_mixer_elem_t
*elem
, unsigned int mask
) {
675 struct userdata
*u
= snd_mixer_elem_get_callback_private(elem
);
678 pa_assert(u
->mixer_handle
);
680 if (mask
== SND_CTL_EVENT_MASK_REMOVE
)
683 if (mask
& SND_CTL_EVENT_MASK_VALUE
) {
684 pa_source_get_volume(u
->source
, TRUE
);
685 pa_source_get_mute(u
->source
, TRUE
);
691 static pa_volume_t
from_alsa_volume(struct userdata
*u
, long alsa_vol
) {
693 return (pa_volume_t
) round(((double) (alsa_vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
) /
694 (double) (u
->hw_volume_max
- u
->hw_volume_min
));
697 static long to_alsa_volume(struct userdata
*u
, pa_volume_t vol
) {
700 alsa_vol
= (long) round(((double) vol
* (double) (u
->hw_volume_max
- u
->hw_volume_min
))
701 / PA_VOLUME_NORM
) + u
->hw_volume_min
;
703 return PA_CLAMP_UNLIKELY(alsa_vol
, u
->hw_volume_min
, u
->hw_volume_max
);
706 static int source_get_volume_cb(pa_source
*s
) {
707 struct userdata
*u
= s
->userdata
;
711 char t
[PA_CVOLUME_SNPRINT_MAX
];
714 pa_assert(u
->mixer_elem
);
716 if (u
->mixer_seperate_channels
) {
718 r
.channels
= s
->sample_spec
.channels
;
720 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
723 if (u
->hw_dB_supported
) {
725 if ((err
= snd_mixer_selem_get_capture_dB(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
)) < 0)
728 #ifdef HAVE_VALGRIND_MEMCHECK_H
729 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol
, sizeof(alsa_vol
));
732 r
.values
[i
] = pa_sw_volume_from_dB((double) (alsa_vol
- u
->hw_dB_max
) / 100.0);
735 if ((err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
)) < 0)
738 r
.values
[i
] = from_alsa_volume(u
, alsa_vol
);
745 if (u
->hw_dB_supported
) {
747 if ((err
= snd_mixer_selem_get_capture_dB(u
->mixer_elem
, SND_MIXER_SCHN_MONO
, &alsa_vol
)) < 0)
750 #ifdef HAVE_VALGRIND_MEMCHECK_H
751 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol
, sizeof(alsa_vol
));
754 pa_cvolume_set(&r
, s
->sample_spec
.channels
, pa_sw_volume_from_dB((double) (alsa_vol
- u
->hw_dB_max
) / 100.0));
758 if ((err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, SND_MIXER_SCHN_MONO
, &alsa_vol
)) < 0)
761 pa_cvolume_set(&r
, s
->sample_spec
.channels
, from_alsa_volume(u
, alsa_vol
));
765 pa_log_debug("Read hardware volume: %s", pa_cvolume_snprint(t
, sizeof(t
), &r
));
767 if (!pa_cvolume_equal(&u
->hardware_volume
, &r
)) {
769 u
->hardware_volume
= s
->volume
= r
;
771 if (u
->hw_dB_supported
) {
774 /* Hmm, so the hardware volume changed, let's reset our software volume */
776 pa_cvolume_reset(&reset
, s
->sample_spec
.channels
);
777 pa_source_set_soft_volume(s
, &reset
);
784 pa_log_error("Unable to read volume: %s", snd_strerror(err
));
789 static int source_set_volume_cb(pa_source
*s
) {
790 struct userdata
*u
= s
->userdata
;
796 pa_assert(u
->mixer_elem
);
798 if (u
->mixer_seperate_channels
) {
800 r
.channels
= s
->sample_spec
.channels
;
802 for (i
= 0; i
< s
->sample_spec
.channels
; i
++) {
806 vol
= s
->volume
.values
[i
];
808 if (u
->hw_dB_supported
) {
810 alsa_vol
= (long) (pa_sw_volume_to_dB(vol
) * 100);
811 alsa_vol
+= u
->hw_dB_max
;
812 alsa_vol
= PA_CLAMP_UNLIKELY(alsa_vol
, u
->hw_dB_min
, u
->hw_dB_max
);
814 if ((err
= snd_mixer_selem_set_capture_dB(u
->mixer_elem
, u
->mixer_map
[i
], alsa_vol
, 1)) < 0)
817 if ((err
= snd_mixer_selem_get_capture_dB(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
)) < 0)
820 #ifdef HAVE_VALGRIND_MEMCHECK_H
821 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol
, sizeof(alsa_vol
));
824 r
.values
[i
] = pa_sw_volume_from_dB((double) (alsa_vol
- u
->hw_dB_max
) / 100.0);
827 alsa_vol
= to_alsa_volume(u
, vol
);
829 if ((err
= snd_mixer_selem_set_capture_volume(u
->mixer_elem
, u
->mixer_map
[i
], alsa_vol
)) < 0)
832 if ((err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, u
->mixer_map
[i
], &alsa_vol
)) < 0)
835 r
.values
[i
] = from_alsa_volume(u
, alsa_vol
);
843 vol
= pa_cvolume_max(&s
->volume
);
845 if (u
->hw_dB_supported
) {
846 alsa_vol
= (long) (pa_sw_volume_to_dB(vol
) * 100);
847 alsa_vol
+= u
->hw_dB_max
;
848 alsa_vol
= PA_CLAMP_UNLIKELY(alsa_vol
, u
->hw_dB_min
, u
->hw_dB_max
);
850 if ((err
= snd_mixer_selem_set_capture_dB_all(u
->mixer_elem
, alsa_vol
, 1)) < 0)
853 if ((err
= snd_mixer_selem_get_capture_dB(u
->mixer_elem
, SND_MIXER_SCHN_MONO
, &alsa_vol
)) < 0)
856 #ifdef HAVE_VALGRIND_MEMCHECK_H
857 VALGRIND_MAKE_MEM_DEFINED(&alsa_vol
, sizeof(alsa_vol
));
860 pa_cvolume_set(&r
, s
->volume
.channels
, pa_sw_volume_from_dB((double) (alsa_vol
- u
->hw_dB_max
) / 100.0));
863 alsa_vol
= to_alsa_volume(u
, vol
);
865 if ((err
= snd_mixer_selem_set_capture_volume_all(u
->mixer_elem
, alsa_vol
)) < 0)
868 if ((err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, SND_MIXER_SCHN_MONO
, &alsa_vol
)) < 0)
871 pa_cvolume_set(&r
, s
->sample_spec
.channels
, from_alsa_volume(u
, alsa_vol
));
875 u
->hardware_volume
= r
;
877 if (u
->hw_dB_supported
) {
878 char t
[PA_CVOLUME_SNPRINT_MAX
];
880 /* Match exactly what the user requested by software */
882 pa_sw_cvolume_divide(&r
, &s
->volume
, &r
);
883 pa_source_set_soft_volume(s
, &r
);
885 pa_log_debug("Requested volume: %s", pa_cvolume_snprint(t
, sizeof(t
), &s
->volume
));
886 pa_log_debug("Got hardware volume: %s", pa_cvolume_snprint(t
, sizeof(t
), &u
->hardware_volume
));
887 pa_log_debug("Calculated software volume: %s", pa_cvolume_snprint(t
, sizeof(t
), &r
));
891 /* We can't match exactly what the user requested, hence let's
892 * at least tell the user about it */
899 pa_log_error("Unable to set volume: %s", snd_strerror(err
));
904 static int source_get_mute_cb(pa_source
*s
) {
905 struct userdata
*u
= s
->userdata
;
909 pa_assert(u
->mixer_elem
);
911 if ((err
= snd_mixer_selem_get_capture_switch(u
->mixer_elem
, 0, &sw
)) < 0) {
912 pa_log_error("Unable to get switch: %s", snd_strerror(err
));
921 static int source_set_mute_cb(pa_source
*s
) {
922 struct userdata
*u
= s
->userdata
;
926 pa_assert(u
->mixer_elem
);
928 if ((err
= snd_mixer_selem_set_capture_switch_all(u
->mixer_elem
, !s
->muted
)) < 0) {
929 pa_log_error("Unable to set switch: %s", snd_strerror(err
));
936 static void source_update_requested_latency_cb(pa_source
*s
) {
937 struct userdata
*u
= s
->userdata
;
946 static void thread_func(void *userdata
) {
947 struct userdata
*u
= userdata
;
948 unsigned short revents
= 0;
952 pa_log_debug("Thread starting up");
954 if (u
->core
->realtime_scheduling
)
955 pa_make_realtime(u
->core
->realtime_priority
);
957 pa_thread_mq_install(&u
->thread_mq
);
958 pa_rtpoll_install(u
->rtpoll
);
963 /* pa_log_debug("loop"); */
965 /* Read some data and pass it to the sources */
966 if (PA_SOURCE_IS_OPENED(u
->source
->thread_info
.state
)) {
968 pa_usec_t sleep_usec
= 0;
971 work_done
= mmap_read(u
, &sleep_usec
, revents
& POLLIN
);
973 work_done
= unix_read(u
, &sleep_usec
, revents
& POLLIN
);
978 /* pa_log_debug("work_done = %i", work_done); */
986 /* OK, the capture buffer is now empty, let's
987 * calculate when to wake up next */
989 /* pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) sleep_usec / PA_USEC_PER_MSEC); */
991 /* Convert from the sound card time domain to the
992 * system time domain */
993 cusec
= pa_smoother_translate(u
->smoother
, pa_rtclock_usec(), sleep_usec
);
995 /* pa_log_debug("Waking up in %0.2fms (system clock).", (double) cusec / PA_USEC_PER_MSEC); */
997 /* We don't trust the conversion, so we wake up whatever comes first */
998 pa_rtpoll_set_timer_relative(u
->rtpoll
, PA_MIN(sleep_usec
, cusec
));
1000 } else if (u
->use_tsched
)
1002 /* OK, we're in an invalid state, let's disable our timers */
1003 pa_rtpoll_set_timer_disabled(u
->rtpoll
);
1005 /* Hmm, nothing to do. Let's sleep */
1006 if ((ret
= pa_rtpoll_run(u
->rtpoll
, TRUE
)) < 0)
1012 /* Tell ALSA about this and process its response */
1013 if (PA_SOURCE_IS_OPENED(u
->source
->thread_info
.state
)) {
1014 struct pollfd
*pollfd
;
1018 pollfd
= pa_rtpoll_item_get_pollfd(u
->alsa_rtpoll_item
, &n
);
1020 if ((err
= snd_pcm_poll_descriptors_revents(u
->pcm_handle
, pollfd
, n
, &revents
)) < 0) {
1021 pa_log("snd_pcm_poll_descriptors_revents() failed: %s", snd_strerror(err
));
1025 if (revents
& (POLLOUT
|POLLERR
|POLLNVAL
|POLLHUP
|POLLPRI
)) {
1026 if (pa_alsa_recover_from_poll(u
->pcm_handle
, revents
) < 0)
1029 snd_pcm_start(u
->pcm_handle
);
1032 if (revents
&& u
->use_tsched
&& pa_log_ratelimit())
1033 pa_log_debug("Wakeup from ALSA!%s%s", (revents
& POLLIN
) ? " INPUT" : "", (revents
& POLLOUT
) ? " OUTPUT" : "");
1039 /* If this was no regular exit from the loop we have to continue
1040 * processing messages until we received PA_MESSAGE_SHUTDOWN */
1041 pa_asyncmsgq_post(u
->thread_mq
.outq
, PA_MSGOBJECT(u
->core
), PA_CORE_MESSAGE_UNLOAD_MODULE
, u
->module
, 0, NULL
, NULL
);
1042 pa_asyncmsgq_wait_for(u
->thread_mq
.inq
, PA_MESSAGE_SHUTDOWN
);
1045 pa_log_debug("Thread shutting down");
1048 static void set_source_name(pa_source_new_data
*data
, pa_modargs
*ma
, const char *device_id
, const char *device_name
) {
1054 pa_assert(device_name
);
1056 if ((n
= pa_modargs_get_value(ma
, "source_name", NULL
))) {
1057 pa_source_new_data_set_name(data
, n
);
1058 data
->namereg_fail
= TRUE
;
1062 if ((n
= pa_modargs_get_value(ma
, "name", NULL
)))
1063 data
->namereg_fail
= TRUE
;
1065 n
= device_id
? device_id
: device_name
;
1066 data
->namereg_fail
= FALSE
;
1069 t
= pa_sprintf_malloc("alsa_input.%s", n
);
1070 pa_source_new_data_set_name(data
, t
);
1074 pa_source
*pa_alsa_source_new(pa_module
*m
, pa_modargs
*ma
, const char*driver
, pa_card
*card
, const pa_alsa_profile_info
*profile
) {
1076 struct userdata
*u
= NULL
;
1077 const char *dev_id
= NULL
;
1080 uint32_t nfrags
, hwbuf_size
, frag_size
, tsched_size
, tsched_watermark
;
1081 snd_pcm_uframes_t period_frames
, tsched_frames
;
1083 snd_pcm_info_t
*pcm_info
= NULL
;
1085 pa_bool_t use_mmap
= TRUE
, b
, use_tsched
= TRUE
, d
;
1086 pa_source_new_data data
;
1088 snd_pcm_info_alloca(&pcm_info
);
1092 ss
= m
->core
->default_sample_spec
;
1093 if (pa_modargs_get_sample_spec_and_channel_map(ma
, &ss
, &map
, PA_CHANNEL_MAP_ALSA
) < 0) {
1094 pa_log("Failed to parse sample specification");
1098 frame_size
= pa_frame_size(&ss
);
1100 nfrags
= m
->core
->default_n_fragments
;
1101 frag_size
= (uint32_t) pa_usec_to_bytes(m
->core
->default_fragment_size_msec
*PA_USEC_PER_MSEC
, &ss
);
1103 frag_size
= (uint32_t) frame_size
;
1104 tsched_size
= (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC
, &ss
);
1105 tsched_watermark
= (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_WATERMARK_USEC
, &ss
);
1107 if (pa_modargs_get_value_u32(ma
, "fragments", &nfrags
) < 0 ||
1108 pa_modargs_get_value_u32(ma
, "fragment_size", &frag_size
) < 0 ||
1109 pa_modargs_get_value_u32(ma
, "tsched_buffer_size", &tsched_size
) < 0 ||
1110 pa_modargs_get_value_u32(ma
, "tsched_buffer_watermark", &tsched_watermark
) < 0) {
1111 pa_log("Failed to parse buffer metrics");
1115 hwbuf_size
= frag_size
* nfrags
;
1116 period_frames
= frag_size
/frame_size
;
1117 tsched_frames
= tsched_size
/frame_size
;
1119 if (pa_modargs_get_value_boolean(ma
, "mmap", &use_mmap
) < 0) {
1120 pa_log("Failed to parse mmap argument.");
1124 if (pa_modargs_get_value_boolean(ma
, "tsched", &use_tsched
) < 0) {
1125 pa_log("Failed to parse timer_scheduling argument.");
1129 if (use_tsched
&& !pa_rtclock_hrtimer()) {
1130 pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
1134 u
= pa_xnew0(struct userdata
, 1);
1137 u
->use_mmap
= use_mmap
;
1138 u
->use_tsched
= use_tsched
;
1139 u
->rtpoll
= pa_rtpoll_new();
1140 pa_thread_mq_init(&u
->thread_mq
, m
->core
->mainloop
, u
->rtpoll
);
1141 u
->alsa_rtpoll_item
= NULL
;
1143 u
->smoother
= pa_smoother_new(DEFAULT_TSCHED_WATERMARK_USEC
, DEFAULT_TSCHED_WATERMARK_USEC
, TRUE
, 5);
1144 pa_smoother_set_time_offset(u
->smoother
, pa_rtclock_usec());
1151 if (!(dev_id
= pa_modargs_get_value(ma
, "device_id", NULL
))) {
1152 pa_log("device_id= not set");
1156 if (!(u
->pcm_handle
= pa_alsa_open_by_device_id_profile(
1160 SND_PCM_STREAM_CAPTURE
,
1161 &nfrags
, &period_frames
, tsched_frames
,
1165 } else if ((dev_id
= pa_modargs_get_value(ma
, "device_id", NULL
))) {
1167 if (!(u
->pcm_handle
= pa_alsa_open_by_device_id_auto(
1171 SND_PCM_STREAM_CAPTURE
,
1172 &nfrags
, &period_frames
, tsched_frames
,
1178 if (!(u
->pcm_handle
= pa_alsa_open_by_device_string(
1179 pa_modargs_get_value(ma
, "device", DEFAULT_DEVICE
),
1182 SND_PCM_STREAM_CAPTURE
,
1183 &nfrags
, &period_frames
, tsched_frames
,
1188 pa_assert(u
->device_name
);
1189 pa_log_info("Successfully opened device %s.", u
->device_name
);
1192 pa_log_info("Selected configuration '%s' (%s).", profile
->description
, profile
->name
);
1194 if (use_mmap
&& !b
) {
1195 pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode.");
1196 u
->use_mmap
= use_mmap
= FALSE
;
1199 if (use_tsched
&& (!b
|| !d
)) {
1200 pa_log_info("Cannot enabled timer-based scheduling, falling back to sound IRQ scheduling.");
1201 u
->use_tsched
= use_tsched
= FALSE
;
1205 pa_log_info("Successfully enabled mmap() mode.");
1208 pa_log_info("Successfully enabled timer-based scheduling mode.");
1210 if ((err
= snd_pcm_info(u
->pcm_handle
, pcm_info
)) < 0) {
1211 pa_log("Error fetching PCM info: %s", snd_strerror(err
));
1215 /* ALSA might tweak the sample spec, so recalculate the frame size */
1216 frame_size
= pa_frame_size(&ss
);
1218 if ((err
= snd_mixer_open(&u
->mixer_handle
, 0)) < 0)
1219 pa_log("Error opening mixer: %s", snd_strerror(err
));
1221 pa_bool_t found
= FALSE
;
1223 if (pa_alsa_prepare_mixer(u
->mixer_handle
, u
->device_name
) >= 0)
1226 snd_pcm_info_t
* info
;
1228 snd_pcm_info_alloca(&info
);
1230 if (snd_pcm_info(u
->pcm_handle
, info
) >= 0) {
1234 if ((card_idx
= snd_pcm_info_get_card(info
)) >= 0) {
1236 md
= pa_sprintf_malloc("hw:%i", card_idx
);
1238 if (strcmp(u
->device_name
, md
))
1239 if (pa_alsa_prepare_mixer(u
->mixer_handle
, md
) >= 0)
1247 if (!(u
->mixer_elem
= pa_alsa_find_elem(u
->mixer_handle
, "Capture", "Mic", FALSE
)))
1251 snd_mixer_close(u
->mixer_handle
);
1252 u
->mixer_handle
= NULL
;
1256 pa_source_new_data_init(&data
);
1257 data
.driver
= driver
;
1260 set_source_name(&data
, ma
, dev_id
, u
->device_name
);
1261 pa_source_new_data_set_sample_spec(&data
, &ss
);
1262 pa_source_new_data_set_channel_map(&data
, &map
);
1264 pa_alsa_init_proplist_pcm(m
->core
, data
.proplist
, pcm_info
);
1265 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_STRING
, u
->device_name
);
1266 pa_proplist_setf(data
.proplist
, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE
, "%lu", (unsigned long) (period_frames
* frame_size
* nfrags
));
1267 pa_proplist_setf(data
.proplist
, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE
, "%lu", (unsigned long) (period_frames
* frame_size
));
1268 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_ACCESS_MODE
, u
->use_tsched
? "mmap+timer" : (u
->use_mmap
? "mmap" : "serial"));
1271 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_PROFILE_NAME
, profile
->name
);
1272 pa_proplist_sets(data
.proplist
, PA_PROP_DEVICE_PROFILE_DESCRIPTION
, profile
->description
);
1275 u
->source
= pa_source_new(m
->core
, &data
, PA_SOURCE_HARDWARE
|PA_SOURCE_LATENCY
);
1276 pa_source_new_data_done(&data
);
1279 pa_log("Failed to create source object");
1283 u
->source
->parent
.process_msg
= source_process_msg
;
1284 u
->source
->update_requested_latency
= source_update_requested_latency_cb
;
1285 u
->source
->userdata
= u
;
1287 pa_source_set_asyncmsgq(u
->source
, u
->thread_mq
.inq
);
1288 pa_source_set_rtpoll(u
->source
, u
->rtpoll
);
1290 u
->frame_size
= frame_size
;
1291 u
->fragment_size
= frag_size
= (uint32_t) (period_frames
* frame_size
);
1292 u
->nfragments
= nfrags
;
1293 u
->hwbuf_size
= u
->fragment_size
* nfrags
;
1294 u
->hwbuf_unused_frames
= 0;
1295 u
->tsched_watermark
= tsched_watermark
;
1297 u
->hw_dB_supported
= FALSE
;
1298 u
->hw_dB_min
= u
->hw_dB_max
= 0;
1299 u
->hw_volume_min
= u
->hw_volume_max
= 0;
1300 u
->mixer_seperate_channels
= FALSE
;
1301 pa_cvolume_mute(&u
->hardware_volume
, u
->source
->sample_spec
.channels
);
1304 fix_tsched_watermark(u
);
1306 pa_source_set_latency_range(u
->source
,
1307 !use_tsched
? pa_bytes_to_usec(u
->hwbuf_size
, &ss
) : (pa_usec_t
) -1,
1308 pa_bytes_to_usec(u
->hwbuf_size
, &ss
));
1310 pa_log_info("Using %u fragments of size %lu bytes, buffer time is %0.2fms",
1311 nfrags
, (long unsigned) u
->fragment_size
,
1312 (double) pa_bytes_to_usec(u
->hwbuf_size
, &ss
) / PA_USEC_PER_MSEC
);
1315 pa_log_info("Time scheduling watermark is %0.2fms",
1316 (double) pa_bytes_to_usec(u
->tsched_watermark
, &ss
) / PA_USEC_PER_MSEC
);
1318 if (update_sw_params(u
) < 0)
1321 if (u
->mixer_handle
) {
1322 pa_assert(u
->mixer_elem
);
1324 if (snd_mixer_selem_has_capture_volume(u
->mixer_elem
)) {
1325 pa_bool_t suitable
= FALSE
;
1327 if (snd_mixer_selem_get_capture_volume_range(u
->mixer_elem
, &u
->hw_volume_min
, &u
->hw_volume_max
) < 0)
1328 pa_log_info("Failed to get volume range. Falling back to software volume control.");
1329 else if (u
->hw_volume_min
>= u
->hw_volume_max
)
1330 pa_log_warn("Your kernel driver is broken: it reports a volume range from %li to %li which makes no sense.", u
->hw_volume_min
, u
->hw_volume_max
);
1332 pa_log_info("Volume ranges from %li to %li.", u
->hw_volume_min
, u
->hw_volume_max
);
1337 if (snd_mixer_selem_get_capture_dB_range(u
->mixer_elem
, &u
->hw_dB_min
, &u
->hw_dB_max
) < 0)
1338 pa_log_info("Mixer doesn't support dB information.");
1340 #ifdef HAVE_VALGRIND_MEMCHECK_H
1341 VALGRIND_MAKE_MEM_DEFINED(&u
->hw_dB_min
, sizeof(u
->hw_dB_min
));
1342 VALGRIND_MAKE_MEM_DEFINED(&u
->hw_dB_max
, sizeof(u
->hw_dB_max
));
1345 if (u
->hw_dB_min
>= u
->hw_dB_max
)
1346 pa_log_warn("Your kernel driver is broken: it reports a volume range from %0.2f dB to %0.2f dB which makes no sense.", (double) u
->hw_dB_min
/100.0, (double) u
->hw_dB_max
/100.0);
1348 pa_log_info("Volume ranges from %0.2f dB to %0.2f dB.", (double) u
->hw_dB_min
/100.0, (double) u
->hw_dB_max
/100.0);
1349 u
->hw_dB_supported
= TRUE
;
1351 if (u
->hw_dB_max
> 0) {
1352 u
->source
->base_volume
= pa_sw_volume_from_dB(- (double) u
->hw_dB_max
/100.0);
1353 pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(u
->source
->base_volume
));
1355 pa_log_info("No particular base volume set, fixing to 0 dB");
1360 if (!u
->hw_dB_supported
&&
1361 u
->hw_volume_max
- u
->hw_volume_min
< 3) {
1363 pa_log_info("Device has less than 4 volume levels. Falling back to software volume control.");
1369 u
->mixer_seperate_channels
= pa_alsa_calc_mixer_map(u
->mixer_elem
, &map
, u
->mixer_map
, FALSE
) >= 0;
1371 u
->source
->get_volume
= source_get_volume_cb
;
1372 u
->source
->set_volume
= source_set_volume_cb
;
1373 u
->source
->flags
|= PA_SOURCE_HW_VOLUME_CTRL
| (u
->hw_dB_supported
? PA_SOURCE_DECIBEL_VOLUME
: 0);
1374 pa_log_info("Using hardware volume control. Hardware dB scale %s.", u
->hw_dB_supported
? "supported" : "not supported");
1376 pa_log_info("Using software volume control.");
1379 if (snd_mixer_selem_has_capture_switch(u
->mixer_elem
)) {
1380 u
->source
->get_mute
= source_get_mute_cb
;
1381 u
->source
->set_mute
= source_set_mute_cb
;
1382 u
->source
->flags
|= PA_SOURCE_HW_MUTE_CTRL
;
1384 pa_log_info("Using software mute control.");
1386 u
->mixer_fdl
= pa_alsa_fdlist_new();
1388 if (pa_alsa_fdlist_set_mixer(u
->mixer_fdl
, u
->mixer_handle
, m
->core
->mainloop
) < 0) {
1389 pa_log("Failed to initialize file descriptor monitoring");
1393 snd_mixer_elem_set_callback(u
->mixer_elem
, mixer_callback
);
1394 snd_mixer_elem_set_callback_private(u
->mixer_elem
, u
);
1396 u
->mixer_fdl
= NULL
;
1398 pa_alsa_dump(u
->pcm_handle
);
1400 if (!(u
->thread
= pa_thread_new(thread_func
, u
))) {
1401 pa_log("Failed to create thread.");
1404 /* Get initial mixer settings */
1405 if (data
.volume_is_set
) {
1406 if (u
->source
->set_volume
)
1407 u
->source
->set_volume(u
->source
);
1409 if (u
->source
->get_volume
)
1410 u
->source
->get_volume(u
->source
);
1413 if (data
.muted_is_set
) {
1414 if (u
->source
->set_mute
)
1415 u
->source
->set_mute(u
->source
);
1417 if (u
->source
->get_mute
)
1418 u
->source
->get_mute(u
->source
);
1421 pa_source_put(u
->source
);
1432 static void userdata_free(struct userdata
*u
) {
1436 pa_source_unlink(u
->source
);
1439 pa_asyncmsgq_send(u
->thread_mq
.inq
, NULL
, PA_MESSAGE_SHUTDOWN
, NULL
, 0, NULL
);
1440 pa_thread_free(u
->thread
);
1443 pa_thread_mq_done(&u
->thread_mq
);
1446 pa_source_unref(u
->source
);
1448 if (u
->alsa_rtpoll_item
)
1449 pa_rtpoll_item_free(u
->alsa_rtpoll_item
);
1452 pa_rtpoll_free(u
->rtpoll
);
1455 pa_alsa_fdlist_free(u
->mixer_fdl
);
1457 if (u
->mixer_handle
)
1458 snd_mixer_close(u
->mixer_handle
);
1460 if (u
->pcm_handle
) {
1461 snd_pcm_drop(u
->pcm_handle
);
1462 snd_pcm_close(u
->pcm_handle
);
1466 pa_smoother_free(u
->smoother
);
1468 pa_xfree(u
->device_name
);
1472 void pa_alsa_source_free(pa_source
*s
) {
1475 pa_source_assert_ref(s
);
1476 pa_assert_se(u
= s
->userdata
);