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)
54 "source_name=<name for the source> "
55 "device=<ALSA device> "
56 "format=<sample format> "
57 "channels=<number of channels> "
59 "fragments=<number of fragments> "
60 "fragment_size=<fragment size> "
61 "channel_map=<channel map>")
64 snd_pcm_t *pcm_handle;
65 snd_mixer_t *mixer_handle;
66 snd_mixer_elem_t *mixer_elem;
68 struct pa_alsa_fdlist *pcm_fdl;
69 struct pa_alsa_fdlist *mixer_fdl;
70 long hw_volume_max, hw_volume_min;
72 size_t frame_size, fragment_size;
77 static const char* const valid_modargs[] = {
89 #define DEFAULT_SOURCE_NAME "alsa_input"
90 #define DEFAULT_DEVICE "default"
92 static void update_usage(struct userdata *u) {
93 pa_module_set_used(u->module,
94 (u->source ? pa_idxset_size(u->source->outputs) : 0));
97 static void xrun_recovery(struct userdata *u) {
100 pa_log(__FILE__": *** ALSA-XRUN (capture) ***");
102 if (snd_pcm_prepare(u->pcm_handle) < 0)
103 pa_log(__FILE__": snd_pcm_prepare() failed");
106 static void do_read(struct userdata *u) {
112 pa_memchunk post_memchunk;
113 snd_pcm_sframes_t frames;
116 if (!u->memchunk.memblock) {
117 u->memchunk.memblock = pa_memblock_new(u->memchunk.length = u->fragment_size, u->source->core->memblock_stat);
118 u->memchunk.index = 0;
121 assert(u->memchunk.memblock && u->memchunk.memblock->data && u->memchunk.length && u->memchunk.memblock->length && (u->memchunk.length % u->frame_size) == 0);
123 if ((frames = snd_pcm_readi(u->pcm_handle, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length / u->frame_size)) < 0) {
124 if (frames == -EAGAIN)
127 if (frames == -EPIPE) {
132 pa_log(__FILE__": snd_pcm_readi() failed: %s", strerror(-frames));
136 l = frames * u->frame_size;
138 post_memchunk = u->memchunk;
139 post_memchunk.length = l;
141 pa_source_post(u->source, &post_memchunk);
143 u->memchunk.index += l;
144 u->memchunk.length -= l;
146 if (u->memchunk.length == 0) {
147 pa_memblock_unref(u->memchunk.memblock);
148 u->memchunk.memblock = NULL;
149 u->memchunk.index = u->memchunk.length = 0;
156 static void fdl_callback(void *userdata) {
157 struct userdata *u = userdata;
160 if (snd_pcm_state(u->pcm_handle) == SND_PCM_STATE_XRUN)
166 static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
167 struct userdata *u = snd_mixer_elem_get_callback_private(elem);
169 assert(u && u->mixer_handle);
171 if (mask & SND_CTL_EVENT_MASK_VALUE) {
172 if (u->source->get_hw_volume)
173 u->source->get_hw_volume(u->source);
174 if (u->source->get_hw_mute)
175 u->source->get_hw_mute(u->source);
176 pa_subscription_post(u->source->core,
177 PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE,
184 static pa_usec_t source_get_latency_cb(pa_source *s) {
185 struct userdata *u = s->userdata;
186 snd_pcm_sframes_t frames;
187 assert(s && u && u->source);
189 if (snd_pcm_delay(u->pcm_handle, &frames) < 0) {
190 pa_log(__FILE__": failed to get delay");
191 s->get_latency = NULL;
195 return pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
198 static int source_get_hw_volume_cb(pa_source *s) {
199 struct userdata *u = s->userdata;
204 assert(u && u->mixer_elem);
206 for (i = 0;i < s->hw_volume.channels;i++) {
207 assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
209 err = snd_mixer_selem_get_capture_volume(u->mixer_elem, i, &vol);
212 s->hw_volume.values[i] =
213 (vol - u->hw_volume_min) * PA_VOLUME_NORM / (u->hw_volume_max - u->hw_volume_min);
219 pa_log_error(__FILE__": Unable to read volume: %s", snd_strerror(err));
220 s->get_hw_volume = NULL;
221 s->set_hw_volume = NULL;
225 static int source_set_hw_volume_cb(pa_source *s) {
226 struct userdata *u = s->userdata;
231 assert(u && u->mixer_elem);
233 for (i = 0;i < s->hw_volume.channels;i++) {
234 assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
236 vol = s->hw_volume.values[i];
238 if (vol > PA_VOLUME_NORM)
239 vol = PA_VOLUME_NORM;
241 vol = vol * (u->hw_volume_max - u->hw_volume_min) /
242 PA_VOLUME_NORM + u->hw_volume_min;
243 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;
300 unsigned periods, fragsize;
301 snd_pcm_uframes_t period_size;
303 snd_pcm_info_t *pcm_info = NULL;
306 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
307 pa_log(__FILE__": failed to parse module arguments");
311 ss = c->default_sample_spec;
312 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map) < 0) {
313 pa_log(__FILE__": failed to parse sample specification");
316 frame_size = pa_frame_size(&ss);
320 if (pa_modargs_get_value_u32(ma, "fragments", &periods) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &fragsize) < 0) {
321 pa_log(__FILE__": failed to parse buffer metrics");
324 period_size = fragsize;
326 u = pa_xmalloc0(sizeof(struct userdata));
330 snd_config_update_free_global();
331 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) {
332 pa_log(__FILE__": Error opening PCM device %s: %s", dev, snd_strerror(err));
336 if ((err = snd_pcm_info_malloc(&pcm_info)) < 0 ||
337 (err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) {
338 pa_log(__FILE__": Error fetching PCM info: %s", snd_strerror(err));
342 if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &periods, &period_size)) < 0) {
343 pa_log(__FILE__": Failed to set hardware parameters: %s", snd_strerror(err));
347 if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0) {
348 pa_log(__FILE__": Error opening mixer: %s", snd_strerror(err));
352 if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
353 !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture"))) {
354 snd_mixer_close(u->mixer_handle);
355 u->mixer_handle = NULL;
358 u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map);
361 u->source->userdata = u;
362 u->source->get_latency = source_get_latency_cb;
363 if (u->mixer_handle) {
364 assert(u->mixer_elem);
365 if (snd_mixer_selem_has_capture_volume(u->mixer_elem)) {
368 for (i = 0;i < ss.channels;i++) {
369 if (!snd_mixer_selem_has_capture_channel(u->mixer_elem, i))
373 if (i == ss.channels) {
374 u->source->get_hw_volume = source_get_hw_volume_cb;
375 u->source->set_hw_volume = source_set_hw_volume_cb;
376 snd_mixer_selem_get_capture_volume_range(
377 u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max);
380 if (snd_mixer_selem_has_capture_switch(u->mixer_elem)) {
381 u->source->get_hw_mute = source_get_hw_mute_cb;
382 u->source->set_hw_mute = source_set_hw_mute_cb;
385 pa_source_set_owner(u->source, m);
386 u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev, snd_pcm_info_get_name(pcm_info));
388 u->pcm_fdl = pa_alsa_fdlist_new();
390 if (pa_alsa_fdlist_init_pcm(u->pcm_fdl, u->pcm_handle, c->mainloop, fdl_callback, u) < 0) {
391 pa_log(__FILE__": failed to initialise file descriptor monitoring");
395 if (u->mixer_handle) {
396 u->mixer_fdl = pa_alsa_fdlist_new();
397 assert(u->mixer_fdl);
398 if (pa_alsa_fdlist_init_mixer(u->mixer_fdl, u->mixer_handle, c->mainloop) < 0) {
399 pa_log(__FILE__": failed to initialise file descriptor monitoring");
402 snd_mixer_elem_set_callback(u->mixer_elem, mixer_callback);
403 snd_mixer_elem_set_callback_private(u->mixer_elem, u);
406 u->frame_size = frame_size;
407 u->fragment_size = period_size;
409 pa_log(__FILE__": using %u fragments of size %lu bytes.", periods, (long unsigned)u->fragment_size);
411 u->memchunk.memblock = NULL;
412 u->memchunk.index = u->memchunk.length = 0;
414 snd_pcm_start(u->pcm_handle);
418 /* Get initial mixer settings */
419 if (u->source->get_hw_volume)
420 u->source->get_hw_volume(u->source);
421 if (u->source->get_hw_mute)
422 u->source->get_hw_mute(u->source);
429 snd_pcm_info_free(pcm_info);
441 void pa__done(pa_core *c, pa_module*m) {
445 if (!(u = m->userdata))
449 pa_source_disconnect(u->source);
450 pa_source_unref(u->source);
454 pa_alsa_fdlist_free(u->pcm_fdl);
456 pa_alsa_fdlist_free(u->mixer_fdl);
459 snd_mixer_close(u->mixer_handle);
462 snd_pcm_drop(u->pcm_handle);
463 snd_pcm_close(u->pcm_handle);
466 if (u->memchunk.memblock)
467 pa_memblock_unref(u->memchunk.memblock);