4 This file is part of polypaudio.
6 polypaudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2 of the License,
9 or (at your option) any later version.
11 polypaudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with polypaudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #ifdef HAVE_SYS_POLL_H
35 #include <asoundlib.h>
37 #include <polypcore/core.h>
38 #include <polypcore/module.h>
39 #include <polypcore/memchunk.h>
40 #include <polypcore/sink.h>
41 #include <polypcore/modargs.h>
42 #include <polypcore/util.h>
43 #include <polypcore/sample-util.h>
44 #include <polypcore/xmalloc.h>
45 #include <polypcore/log.h>
47 #include "alsa-util.h"
48 #include "module-alsa-sink-symdef.h"
50 PA_MODULE_AUTHOR("Lennart Poettering")
51 PA_MODULE_DESCRIPTION("ALSA Sink")
52 PA_MODULE_VERSION(PACKAGE_VERSION
)
53 PA_MODULE_USAGE("sink_name=<name for the sink> device=<ALSA device> format=<sample format> channels=<number of channels> rate=<sample rate> fragments=<number of fragments> fragment_size=<fragment size>")
56 snd_pcm_t
*pcm_handle
;
57 snd_mixer_t
*mixer_handle
;
58 snd_mixer_elem_t
*mixer_elem
;
60 struct pa_alsa_fdlist
*pcm_fdl
;
61 struct pa_alsa_fdlist
*mixer_fdl
;
62 long hw_volume_max
, hw_volume_min
;
64 size_t frame_size
, fragment_size
;
65 pa_memchunk memchunk
, silence
;
69 static const char* const valid_modargs
[] = {
80 #define DEFAULT_SINK_NAME "alsa_output"
81 #define DEFAULT_DEVICE "default"
83 static void update_usage(struct userdata
*u
) {
84 pa_module_set_used(u
->module
,
85 (u
->sink
? pa_idxset_size(u
->sink
->inputs
) : 0) +
86 (u
->sink
? pa_idxset_size(u
->sink
->monitor_source
->outputs
) : 0));
89 static void xrun_recovery(struct userdata
*u
) {
92 pa_log(__FILE__
": *** ALSA-XRUN (playback) ***");
94 if (snd_pcm_prepare(u
->pcm_handle
) < 0)
95 pa_log(__FILE__
": snd_pcm_prepare() failed");
98 static void do_write(struct userdata
*u
) {
104 pa_memchunk
*memchunk
= NULL
;
105 snd_pcm_sframes_t frames
;
107 if (u
->memchunk
.memblock
)
108 memchunk
= &u
->memchunk
;
110 if (pa_sink_render(u
->sink
, u
->fragment_size
, &u
->memchunk
) < 0)
111 memchunk
= &u
->silence
;
113 memchunk
= &u
->memchunk
;
116 assert(memchunk
->memblock
&& memchunk
->memblock
->data
&& memchunk
->length
&& memchunk
->memblock
->length
&& (memchunk
->length
% u
->frame_size
) == 0);
118 if ((frames
= snd_pcm_writei(u
->pcm_handle
, (uint8_t*) memchunk
->memblock
->data
+ memchunk
->index
, memchunk
->length
/ u
->frame_size
)) < 0) {
119 if (frames
== -EAGAIN
)
122 if (frames
== -EPIPE
) {
127 pa_log(__FILE__
": snd_pcm_writei() failed: %s", snd_strerror(frames
));
131 if (memchunk
== &u
->memchunk
) {
132 size_t l
= frames
* u
->frame_size
;
133 memchunk
->index
+= l
;
134 memchunk
->length
-= l
;
136 if (memchunk
->length
== 0) {
137 pa_memblock_unref(memchunk
->memblock
);
138 memchunk
->memblock
= NULL
;
139 memchunk
->index
= memchunk
->length
= 0;
147 static void fdl_callback(void *userdata
) {
148 struct userdata
*u
= userdata
;
151 if (snd_pcm_state(u
->pcm_handle
) == SND_PCM_STATE_XRUN
)
157 static int mixer_callback(snd_mixer_elem_t
*elem
, unsigned int mask
) {
158 struct userdata
*u
= snd_mixer_elem_get_callback_private(elem
);
160 assert(u
&& u
->mixer_handle
);
162 if (mask
& SND_CTL_EVENT_MASK_VALUE
) {
163 if (u
->sink
->get_hw_volume
)
164 u
->sink
->get_hw_volume(u
->sink
);
165 if (u
->sink
->get_hw_mute
)
166 u
->sink
->get_hw_mute(u
->sink
);
167 pa_subscription_post(u
->sink
->core
,
168 PA_SUBSCRIPTION_EVENT_SINK
|PA_SUBSCRIPTION_EVENT_CHANGE
,
175 static pa_usec_t
sink_get_latency_cb(pa_sink
*s
) {
177 struct userdata
*u
= s
->userdata
;
178 snd_pcm_sframes_t frames
;
181 assert(s
&& u
&& u
->sink
);
183 if ((err
= snd_pcm_delay(u
->pcm_handle
, &frames
)) < 0) {
184 pa_log(__FILE__
": failed to get delay: %s", snd_strerror(err
));
185 s
->get_latency
= NULL
;
192 r
+= pa_bytes_to_usec(frames
* u
->frame_size
, &s
->sample_spec
);
194 if (u
->memchunk
.memblock
)
195 r
+= pa_bytes_to_usec(u
->memchunk
.length
, &s
->sample_spec
);
200 static int sink_get_hw_volume_cb(pa_sink
*s
) {
201 struct userdata
*u
= s
->userdata
;
205 assert(u
&& u
->mixer_elem
);
207 if (snd_mixer_selem_has_playback_volume_joined(u
->mixer_elem
)) {
208 err
= snd_mixer_selem_get_playback_volume(u
->mixer_elem
, 0, &vol
);
211 pa_cvolume_set(&s
->hw_volume
, s
->hw_volume
.channels
,
212 (vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
/ (u
->hw_volume_max
- u
->hw_volume_min
));
216 for (i
= 0;i
< s
->hw_volume
.channels
;i
++) {
217 err
= snd_mixer_selem_get_playback_volume(u
->mixer_elem
, i
, &vol
);
220 s
->hw_volume
.values
[i
] =
221 (vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
/ (u
->hw_volume_max
- u
->hw_volume_min
);
228 pa_log_error(__FILE__
": Unable to read volume: %s", snd_strerror(err
));
229 s
->get_hw_volume
= NULL
;
230 s
->set_hw_volume
= NULL
;
234 static int sink_set_hw_volume_cb(pa_sink
*s
) {
235 struct userdata
*u
= s
->userdata
;
239 assert(u
&& u
->mixer_elem
);
241 if (snd_mixer_selem_has_playback_volume_joined(u
->mixer_elem
)) {
242 vol
= pa_cvolume_avg(&s
->hw_volume
) * (u
->hw_volume_max
- u
->hw_volume_min
) /
243 PA_VOLUME_NORM
+ u
->hw_volume_min
;
244 err
= snd_mixer_selem_set_playback_volume_all(u
->mixer_elem
, vol
);
250 for (i
= 0;i
< s
->hw_volume
.channels
;i
++) {
251 vol
= s
->hw_volume
.values
[i
] * (u
->hw_volume_max
- u
->hw_volume_min
) /
252 PA_VOLUME_NORM
+ u
->hw_volume_min
;
253 err
= snd_mixer_selem_set_playback_volume(u
->mixer_elem
, i
, vol
);
262 pa_log_error(__FILE__
": Unable to set volume: %s", snd_strerror(err
));
263 s
->get_hw_volume
= NULL
;
264 s
->set_hw_volume
= NULL
;
268 static int sink_get_hw_mute_cb(pa_sink
*s
) {
269 struct userdata
*u
= s
->userdata
;
272 assert(u
&& u
->mixer_elem
);
274 err
= snd_mixer_selem_get_playback_switch(u
->mixer_elem
, 0, &sw
);
276 pa_log_error(__FILE__
": Unable to get switch: %s", snd_strerror(err
));
277 s
->get_hw_mute
= NULL
;
278 s
->set_hw_mute
= NULL
;
287 static int sink_set_hw_mute_cb(pa_sink
*s
) {
288 struct userdata
*u
= s
->userdata
;
291 assert(u
&& u
->mixer_elem
);
293 err
= snd_mixer_selem_set_playback_switch_all(u
->mixer_elem
, !s
->hw_muted
);
295 pa_log_error(__FILE__
": Unable to set switch: %s", snd_strerror(err
));
296 s
->get_hw_mute
= NULL
;
297 s
->set_hw_mute
= NULL
;
304 int pa__init(pa_core
*c
, pa_module
*m
) {
305 pa_modargs
*ma
= NULL
;
307 struct userdata
*u
= NULL
;
310 uint32_t periods
, fragsize
;
311 snd_pcm_uframes_t period_size
;
313 snd_pcm_info_t
*pcm_info
= NULL
;
316 if (!(ma
= pa_modargs_new(m
->argument
, valid_modargs
))) {
317 pa_log(__FILE__
": failed to parse module arguments");
321 ss
= c
->default_sample_spec
;
322 if (pa_modargs_get_sample_spec(ma
, &ss
) < 0) {
323 pa_log(__FILE__
": failed to parse sample specification");
326 frame_size
= pa_frame_size(&ss
);
330 if (pa_modargs_get_value_u32(ma
, "fragments", &periods
) < 0 || pa_modargs_get_value_u32(ma
, "fragment_size", &fragsize
) < 0) {
331 pa_log(__FILE__
": failed to parse buffer metrics");
334 period_size
= fragsize
;
336 u
= pa_xmalloc0(sizeof(struct userdata
));
340 snd_config_update_free_global();
341 if ((err
= snd_pcm_open(&u
->pcm_handle
, dev
= pa_modargs_get_value(ma
, "device", DEFAULT_DEVICE
), SND_PCM_STREAM_PLAYBACK
, SND_PCM_NONBLOCK
)) < 0) {
342 pa_log(__FILE__
": Error opening PCM device %s: %s", dev
, snd_strerror(err
));
346 if ((err
= snd_pcm_info_malloc(&pcm_info
)) < 0 ||
347 (err
= snd_pcm_info(u
->pcm_handle
, pcm_info
)) < 0) {
348 pa_log(__FILE__
": Error fetching PCM info: %s", snd_strerror(err
));
352 if ((err
= pa_alsa_set_hw_params(u
->pcm_handle
, &ss
, &periods
, &period_size
)) < 0) {
353 pa_log(__FILE__
": Failed to set hardware parameters: %s", snd_strerror(err
));
357 if ((err
= snd_mixer_open(&u
->mixer_handle
, 0)) < 0) {
358 pa_log(__FILE__
": Error opening mixer: %s", snd_strerror(err
));
362 if ((pa_alsa_prepare_mixer(u
->mixer_handle
, dev
) < 0) ||
363 !(u
->mixer_elem
= pa_alsa_find_elem(u
->mixer_handle
, "PCM"))) {
364 snd_mixer_close(u
->mixer_handle
);
365 u
->mixer_handle
= NULL
;
368 u
->sink
= pa_sink_new(c
, __FILE__
, pa_modargs_get_value(ma
, "sink_name", DEFAULT_SINK_NAME
), 0, &ss
, NULL
);
371 u
->sink
->get_latency
= sink_get_latency_cb
;
372 if (u
->mixer_handle
) {
373 assert(u
->mixer_elem
);
374 if (snd_mixer_selem_has_playback_volume(u
->mixer_elem
)) {
375 u
->sink
->get_hw_volume
= sink_get_hw_volume_cb
;
376 u
->sink
->set_hw_volume
= sink_set_hw_volume_cb
;
377 snd_mixer_selem_get_playback_volume_range(
378 u
->mixer_elem
, &u
->hw_volume_min
, &u
->hw_volume_max
);
380 if (snd_mixer_selem_has_playback_switch(u
->mixer_elem
)) {
381 u
->sink
->get_hw_mute
= sink_get_hw_mute_cb
;
382 u
->sink
->set_hw_mute
= sink_set_hw_mute_cb
;
385 u
->sink
->userdata
= u
;
386 pa_sink_set_owner(u
->sink
, m
);
387 u
->sink
->description
= pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev
, snd_pcm_info_get_name(pcm_info
));
389 u
->pcm_fdl
= pa_alsa_fdlist_new();
391 if (pa_alsa_fdlist_init_pcm(u
->pcm_fdl
, u
->pcm_handle
, c
->mainloop
, fdl_callback
, u
) < 0) {
392 pa_log(__FILE__
": failed to initialise file descriptor monitoring");
396 if (u
->mixer_handle
) {
397 u
->mixer_fdl
= pa_alsa_fdlist_new();
398 assert(u
->mixer_fdl
);
399 if (pa_alsa_fdlist_init_mixer(u
->mixer_fdl
, u
->mixer_handle
, c
->mainloop
) < 0) {
400 pa_log(__FILE__
": failed to initialise file descriptor monitoring");
403 snd_mixer_elem_set_callback(u
->mixer_elem
, mixer_callback
);
404 snd_mixer_elem_set_callback_private(u
->mixer_elem
, u
);
407 u
->frame_size
= frame_size
;
408 u
->fragment_size
= period_size
;
410 pa_log_info(__FILE__
": using %u fragments of size %lu bytes.", periods
, (long unsigned)u
->fragment_size
);
412 u
->silence
.memblock
= pa_memblock_new(u
->silence
.length
= u
->fragment_size
, c
->memblock_stat
);
413 assert(u
->silence
.memblock
);
414 pa_silence_memblock(u
->silence
.memblock
, &ss
);
415 u
->silence
.index
= 0;
417 u
->memchunk
.memblock
= NULL
;
418 u
->memchunk
.index
= u
->memchunk
.length
= 0;
422 /* Get initial mixer settings */
423 if (u
->sink
->get_hw_volume
)
424 u
->sink
->get_hw_volume(u
->sink
);
425 if (u
->sink
->get_hw_mute
)
426 u
->sink
->get_hw_mute(u
->sink
);
433 snd_pcm_info_free(pcm_info
);
445 void pa__done(pa_core
*c
, pa_module
*m
) {
449 if (!(u
= m
->userdata
))
453 pa_sink_disconnect(u
->sink
);
454 pa_sink_unref(u
->sink
);
458 pa_alsa_fdlist_free(u
->pcm_fdl
);
460 pa_alsa_fdlist_free(u
->mixer_fdl
);
463 snd_mixer_close(u
->mixer_handle
);
466 snd_pcm_drop(u
->pcm_handle
);
467 snd_pcm_close(u
->pcm_handle
);
470 if (u
->memchunk
.memblock
)
471 pa_memblock_unref(u
->memchunk
.memblock
);
472 if (u
->silence
.memblock
)
473 pa_memblock_unref(u
->silence
.memblock
);