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-source-symdef.h"
50 PA_MODULE_AUTHOR("Lennart Poettering")
51 PA_MODULE_DESCRIPTION("ALSA Source")
52 PA_MODULE_VERSION(PACKAGE_VERSION
)
53 PA_MODULE_USAGE("source_name=<name for the source> 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
;
69 static const char* const valid_modargs
[] = {
80 #define DEFAULT_SOURCE_NAME "alsa_input"
81 #define DEFAULT_DEVICE "default"
83 static void update_usage(struct userdata
*u
) {
84 pa_module_set_used(u
->module
,
85 (u
->source
? pa_idxset_size(u
->source
->outputs
) : 0));
88 static void xrun_recovery(struct userdata
*u
) {
91 pa_log(__FILE__
": *** ALSA-XRUN (capture) ***");
93 if (snd_pcm_prepare(u
->pcm_handle
) < 0)
94 pa_log(__FILE__
": snd_pcm_prepare() failed");
97 static void do_read(struct userdata
*u
) {
103 pa_memchunk post_memchunk
;
104 snd_pcm_sframes_t frames
;
107 if (!u
->memchunk
.memblock
) {
108 u
->memchunk
.memblock
= pa_memblock_new(u
->memchunk
.length
= u
->fragment_size
, u
->source
->core
->memblock_stat
);
109 u
->memchunk
.index
= 0;
112 assert(u
->memchunk
.memblock
&& u
->memchunk
.memblock
->data
&& u
->memchunk
.length
&& u
->memchunk
.memblock
->length
&& (u
->memchunk
.length
% u
->frame_size
) == 0);
114 if ((frames
= snd_pcm_readi(u
->pcm_handle
, (uint8_t*) u
->memchunk
.memblock
->data
+ u
->memchunk
.index
, u
->memchunk
.length
/ u
->frame_size
)) < 0) {
115 if (frames
== -EAGAIN
)
118 if (frames
== -EPIPE
) {
123 pa_log(__FILE__
": snd_pcm_readi() failed: %s", strerror(-frames
));
127 l
= frames
* u
->frame_size
;
129 post_memchunk
= u
->memchunk
;
130 post_memchunk
.length
= l
;
132 pa_source_post(u
->source
, &post_memchunk
);
134 u
->memchunk
.index
+= l
;
135 u
->memchunk
.length
-= l
;
137 if (u
->memchunk
.length
== 0) {
138 pa_memblock_unref(u
->memchunk
.memblock
);
139 u
->memchunk
.memblock
= NULL
;
140 u
->memchunk
.index
= u
->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
->source
->get_hw_volume
)
164 u
->source
->get_hw_volume(u
->source
);
165 if (u
->source
->get_hw_mute
)
166 u
->source
->get_hw_mute(u
->source
);
167 pa_subscription_post(u
->source
->core
,
168 PA_SUBSCRIPTION_EVENT_SOURCE
|PA_SUBSCRIPTION_EVENT_CHANGE
,
175 static pa_usec_t
source_get_latency_cb(pa_source
*s
) {
176 struct userdata
*u
= s
->userdata
;
177 snd_pcm_sframes_t frames
;
178 assert(s
&& u
&& u
->source
);
180 if (snd_pcm_delay(u
->pcm_handle
, &frames
) < 0) {
181 pa_log(__FILE__
": failed to get delay");
182 s
->get_latency
= NULL
;
186 return pa_bytes_to_usec(frames
* u
->frame_size
, &s
->sample_spec
);
189 static int source_get_hw_volume_cb(pa_source
*s
) {
190 struct userdata
*u
= s
->userdata
;
194 assert(u
&& u
->mixer_elem
);
196 if (snd_mixer_selem_has_capture_volume_joined(u
->mixer_elem
)) {
197 err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, 0, &vol
);
200 pa_cvolume_set(&s
->hw_volume
, s
->hw_volume
.channels
,
201 (vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
/ (u
->hw_volume_max
- u
->hw_volume_min
));
205 for (i
= 0;i
< s
->hw_volume
.channels
;i
++) {
206 err
= snd_mixer_selem_get_capture_volume(u
->mixer_elem
, i
, &vol
);
209 s
->hw_volume
.values
[i
] =
210 (vol
- u
->hw_volume_min
) * PA_VOLUME_NORM
/ (u
->hw_volume_max
- u
->hw_volume_min
);
217 pa_log_error(__FILE__
": Unable to read volume: %s", snd_strerror(err
));
218 s
->get_hw_volume
= NULL
;
219 s
->set_hw_volume
= NULL
;
223 static int source_set_hw_volume_cb(pa_source
*s
) {
224 struct userdata
*u
= s
->userdata
;
228 assert(u
&& u
->mixer_elem
);
230 if (snd_mixer_selem_has_capture_volume_joined(u
->mixer_elem
)) {
231 vol
= pa_cvolume_avg(&s
->hw_volume
) * (u
->hw_volume_max
- u
->hw_volume_min
) /
232 PA_VOLUME_NORM
+ u
->hw_volume_min
;
233 err
= snd_mixer_selem_set_capture_volume_all(u
->mixer_elem
, vol
);
239 for (i
= 0;i
< s
->hw_volume
.channels
;i
++) {
240 vol
= s
->hw_volume
.values
[i
] * (u
->hw_volume_max
- u
->hw_volume_min
) /
241 PA_VOLUME_NORM
+ u
->hw_volume_min
;
242 err
= snd_mixer_selem_set_capture_volume(u
->mixer_elem
, i
, vol
);
251 pa_log_error(__FILE__
": Unable to set volume: %s", snd_strerror(err
));
252 s
->get_hw_volume
= NULL
;
253 s
->set_hw_volume
= NULL
;
257 static int source_get_hw_mute_cb(pa_source
*s
) {
258 struct userdata
*u
= s
->userdata
;
261 assert(u
&& u
->mixer_elem
);
263 err
= snd_mixer_selem_get_capture_switch(u
->mixer_elem
, 0, &sw
);
265 pa_log_error(__FILE__
": Unable to get switch: %s", snd_strerror(err
));
266 s
->get_hw_mute
= NULL
;
267 s
->set_hw_mute
= NULL
;
276 static int source_set_hw_mute_cb(pa_source
*s
) {
277 struct userdata
*u
= s
->userdata
;
280 assert(u
&& u
->mixer_elem
);
282 err
= snd_mixer_selem_set_capture_switch_all(u
->mixer_elem
, !s
->hw_muted
);
284 pa_log_error(__FILE__
": Unable to set switch: %s", snd_strerror(err
));
285 s
->get_hw_mute
= NULL
;
286 s
->set_hw_mute
= NULL
;
293 int pa__init(pa_core
*c
, pa_module
*m
) {
294 pa_modargs
*ma
= NULL
;
296 struct userdata
*u
= NULL
;
299 unsigned periods
, fragsize
;
300 snd_pcm_uframes_t period_size
;
302 snd_pcm_info_t
*pcm_info
= NULL
;
305 if (!(ma
= pa_modargs_new(m
->argument
, valid_modargs
))) {
306 pa_log(__FILE__
": failed to parse module arguments");
310 ss
= c
->default_sample_spec
;
311 if (pa_modargs_get_sample_spec(ma
, &ss
) < 0) {
312 pa_log(__FILE__
": failed to parse sample specification");
315 frame_size
= pa_frame_size(&ss
);
319 if (pa_modargs_get_value_u32(ma
, "fragments", &periods
) < 0 || pa_modargs_get_value_u32(ma
, "fragment_size", &fragsize
) < 0) {
320 pa_log(__FILE__
": failed to parse buffer metrics");
323 period_size
= fragsize
;
325 u
= pa_xmalloc0(sizeof(struct userdata
));
329 snd_config_update_free_global();
330 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) {
331 pa_log(__FILE__
": Error opening PCM device %s: %s", dev
, snd_strerror(err
));
335 if ((err
= snd_pcm_info_malloc(&pcm_info
)) < 0 ||
336 (err
= snd_pcm_info(u
->pcm_handle
, pcm_info
)) < 0) {
337 pa_log(__FILE__
": Error fetching PCM info: %s", snd_strerror(err
));
341 if ((err
= pa_alsa_set_hw_params(u
->pcm_handle
, &ss
, &periods
, &period_size
)) < 0) {
342 pa_log(__FILE__
": Failed to set hardware parameters: %s", snd_strerror(err
));
346 if ((err
= snd_mixer_open(&u
->mixer_handle
, 0)) < 0) {
347 pa_log(__FILE__
": Error opening mixer: %s", snd_strerror(err
));
351 if ((pa_alsa_prepare_mixer(u
->mixer_handle
, dev
) < 0) ||
352 !(u
->mixer_elem
= pa_alsa_find_elem(u
->mixer_handle
, "Capture"))) {
353 snd_mixer_close(u
->mixer_handle
);
354 u
->mixer_handle
= NULL
;
357 u
->source
= pa_source_new(c
, __FILE__
, pa_modargs_get_value(ma
, "source_name", DEFAULT_SOURCE_NAME
), 0, &ss
, NULL
);
360 u
->source
->userdata
= u
;
361 u
->source
->get_latency
= source_get_latency_cb
;
362 if (u
->mixer_handle
) {
363 assert(u
->mixer_elem
);
364 if (snd_mixer_selem_has_capture_volume(u
->mixer_elem
)) {
365 u
->source
->get_hw_volume
= source_get_hw_volume_cb
;
366 u
->source
->set_hw_volume
= source_set_hw_volume_cb
;
367 snd_mixer_selem_get_capture_volume_range(
368 u
->mixer_elem
, &u
->hw_volume_min
, &u
->hw_volume_max
);
370 if (snd_mixer_selem_has_capture_switch(u
->mixer_elem
)) {
371 u
->source
->get_hw_mute
= source_get_hw_mute_cb
;
372 u
->source
->set_hw_mute
= source_set_hw_mute_cb
;
375 pa_source_set_owner(u
->source
, m
);
376 u
->source
->description
= pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev
, snd_pcm_info_get_name(pcm_info
));
378 u
->pcm_fdl
= pa_alsa_fdlist_new();
380 if (pa_alsa_fdlist_init_pcm(u
->pcm_fdl
, u
->pcm_handle
, c
->mainloop
, fdl_callback
, u
) < 0) {
381 pa_log(__FILE__
": failed to initialise file descriptor monitoring");
385 if (u
->mixer_handle
) {
386 u
->mixer_fdl
= pa_alsa_fdlist_new();
387 assert(u
->mixer_fdl
);
388 if (pa_alsa_fdlist_init_mixer(u
->mixer_fdl
, u
->mixer_handle
, c
->mainloop
) < 0) {
389 pa_log(__FILE__
": failed to initialise file descriptor monitoring");
392 snd_mixer_elem_set_callback(u
->mixer_elem
, mixer_callback
);
393 snd_mixer_elem_set_callback_private(u
->mixer_elem
, u
);
396 u
->frame_size
= frame_size
;
397 u
->fragment_size
= period_size
;
399 pa_log(__FILE__
": using %u fragments of size %lu bytes.", periods
, (long unsigned)u
->fragment_size
);
401 u
->memchunk
.memblock
= NULL
;
402 u
->memchunk
.index
= u
->memchunk
.length
= 0;
404 snd_pcm_start(u
->pcm_handle
);
408 /* Get initial mixer settings */
409 if (u
->source
->get_hw_volume
)
410 u
->source
->get_hw_volume(u
->source
);
411 if (u
->source
->get_hw_mute
)
412 u
->source
->get_hw_mute(u
->source
);
419 snd_pcm_info_free(pcm_info
);
431 void pa__done(pa_core
*c
, pa_module
*m
) {
435 if (!(u
= m
->userdata
))
439 pa_source_disconnect(u
->source
);
440 pa_source_unref(u
->source
);
444 pa_alsa_fdlist_free(u
->pcm_fdl
);
446 pa_alsa_fdlist_free(u
->mixer_fdl
);
449 snd_mixer_close(u
->mixer_handle
);
452 snd_pcm_drop(u
->pcm_handle
);
453 snd_pcm_close(u
->pcm_handle
);
456 if (u
->memchunk
.memblock
)
457 pa_memblock_unref(u
->memchunk
.memblock
);