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 <polyp/xmalloc.h>
39 #include <polypcore/core.h>
40 #include <polypcore/module.h>
41 #include <polypcore/memchunk.h>
42 #include <polypcore/sink.h>
43 #include <polypcore/modargs.h>
44 #include <polypcore/core-util.h>
45 #include <polypcore/sample-util.h>
46 #include <polypcore/log.h>
48 #include "alsa-util.h"
49 #include "module-alsa-source-symdef.h"
51 PA_MODULE_AUTHOR("Lennart Poettering")
52 PA_MODULE_DESCRIPTION("ALSA Source")
53 PA_MODULE_VERSION(PACKAGE_VERSION)
55 "source_name=<name for the source> "
56 "device=<ALSA device> "
57 "format=<sample format> "
58 "channels=<number of channels> "
60 "fragments=<number of fragments> "
61 "fragment_size=<fragment size> "
62 "channel_map=<channel map>")
65 snd_pcm_t *pcm_handle;
66 snd_mixer_t *mixer_handle;
67 snd_mixer_elem_t *mixer_elem;
69 struct pa_alsa_fdlist *pcm_fdl;
70 struct pa_alsa_fdlist *mixer_fdl;
71 long hw_volume_max, hw_volume_min;
73 size_t frame_size, fragment_size;
78 static const char* const valid_modargs[] = {
90 #define DEFAULT_SOURCE_NAME "alsa_input"
91 #define DEFAULT_DEVICE "default"
93 static void update_usage(struct userdata *u) {
94 pa_module_set_used(u->module,
95 (u->source ? pa_idxset_size(u->source->outputs) : 0));
98 static void xrun_recovery(struct userdata *u) {
101 pa_log(__FILE__": *** ALSA-XRUN (capture) ***");
103 if (snd_pcm_prepare(u->pcm_handle) < 0)
104 pa_log(__FILE__": snd_pcm_prepare() failed");
107 static void do_read(struct userdata *u) {
113 pa_memchunk post_memchunk;
114 snd_pcm_sframes_t frames;
117 if (!u->memchunk.memblock) {
118 u->memchunk.memblock = pa_memblock_new(u->memchunk.length = u->fragment_size, u->source->core->memblock_stat);
119 u->memchunk.index = 0;
122 assert(u->memchunk.memblock);
123 assert(u->memchunk.length);
124 assert(u->memchunk.memblock->data);
125 assert(u->memchunk.memblock->length);
126 assert(u->memchunk.length % u->frame_size == 0);
128 if ((frames = snd_pcm_readi(u->pcm_handle, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length / u->frame_size)) < 0) {
129 if (frames == -EAGAIN)
132 if (frames == -EPIPE) {
137 pa_log(__FILE__": snd_pcm_readi() failed: %s", strerror(-frames));
141 l = frames * u->frame_size;
143 post_memchunk = u->memchunk;
144 post_memchunk.length = l;
146 pa_source_post(u->source, &post_memchunk);
148 u->memchunk.index += l;
149 u->memchunk.length -= l;
151 if (u->memchunk.length == 0) {
152 pa_memblock_unref(u->memchunk.memblock);
153 u->memchunk.memblock = NULL;
154 u->memchunk.index = u->memchunk.length = 0;
161 static void fdl_callback(void *userdata) {
162 struct userdata *u = userdata;
165 if (snd_pcm_state(u->pcm_handle) == SND_PCM_STATE_XRUN)
171 static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
172 struct userdata *u = snd_mixer_elem_get_callback_private(elem);
174 assert(u && u->mixer_handle);
176 if (mask == SND_CTL_EVENT_MASK_REMOVE)
179 if (mask & SND_CTL_EVENT_MASK_VALUE) {
180 if (u->source->get_hw_volume)
181 u->source->get_hw_volume(u->source);
182 if (u->source->get_hw_mute)
183 u->source->get_hw_mute(u->source);
184 pa_subscription_post(u->source->core,
185 PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE,
192 static pa_usec_t source_get_latency_cb(pa_source *s) {
193 struct userdata *u = s->userdata;
194 snd_pcm_sframes_t frames;
195 assert(s && u && u->source);
197 if (snd_pcm_delay(u->pcm_handle, &frames) < 0) {
198 pa_log(__FILE__": failed to get delay");
199 s->get_latency = NULL;
203 return pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
206 static int source_get_hw_volume_cb(pa_source *s) {
207 struct userdata *u = s->userdata;
212 assert(u && u->mixer_elem);
214 for (i = 0;i < s->hw_volume.channels;i++) {
215 assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
217 err = snd_mixer_selem_get_capture_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);
227 pa_log_error(__FILE__": Unable to read volume: %s", snd_strerror(err));
228 s->get_hw_volume = NULL;
229 s->set_hw_volume = NULL;
233 static int source_set_hw_volume_cb(pa_source *s) {
234 struct userdata *u = s->userdata;
239 assert(u && u->mixer_elem);
241 for (i = 0;i < s->hw_volume.channels;i++) {
242 assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
244 vol = s->hw_volume.values[i];
246 if (vol > PA_VOLUME_NORM)
247 vol = PA_VOLUME_NORM;
249 vol = vol * (u->hw_volume_max - u->hw_volume_min) /
250 PA_VOLUME_NORM + u->hw_volume_min;
251 err = snd_mixer_selem_set_capture_volume(u->mixer_elem, i, vol);
259 pa_log_error(__FILE__": Unable to set volume: %s", snd_strerror(err));
260 s->get_hw_volume = NULL;
261 s->set_hw_volume = NULL;
265 static int source_get_hw_mute_cb(pa_source *s) {
266 struct userdata *u = s->userdata;
269 assert(u && u->mixer_elem);
271 err = snd_mixer_selem_get_capture_switch(u->mixer_elem, 0, &sw);
273 pa_log_error(__FILE__": Unable to get switch: %s", snd_strerror(err));
274 s->get_hw_mute = NULL;
275 s->set_hw_mute = NULL;
284 static int source_set_hw_mute_cb(pa_source *s) {
285 struct userdata *u = s->userdata;
288 assert(u && u->mixer_elem);
290 err = snd_mixer_selem_set_capture_switch_all(u->mixer_elem, !s->hw_muted);
292 pa_log_error(__FILE__": Unable to set switch: %s", snd_strerror(err));
293 s->get_hw_mute = NULL;
294 s->set_hw_mute = NULL;
301 int pa__init(pa_core *c, pa_module*m) {
302 pa_modargs *ma = NULL;
304 struct userdata *u = NULL;
308 unsigned periods, fragsize;
309 snd_pcm_uframes_t period_size;
311 snd_pcm_info_t *pcm_info = NULL;
314 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
315 pa_log(__FILE__": failed to parse module arguments");
319 ss = c->default_sample_spec;
320 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_ALSA) < 0) {
321 pa_log(__FILE__": failed to parse sample specification");
325 frame_size = pa_frame_size(&ss);
327 /* Fix latency to 100ms */
329 fragsize = pa_bytes_per_second(&ss)/128;
331 if (pa_modargs_get_value_u32(ma, "fragments", &periods) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &fragsize) < 0) {
332 pa_log(__FILE__": failed to parse buffer metrics");
335 period_size = fragsize/frame_size;
337 u = pa_xmalloc0(sizeof(struct userdata));
341 snd_config_update_free_global();
342 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) {
343 pa_log(__FILE__": Error opening PCM device %s: %s", dev, snd_strerror(err));
347 if ((err = snd_pcm_info_malloc(&pcm_info)) < 0 ||
348 (err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) {
349 pa_log(__FILE__": Error fetching PCM info: %s", snd_strerror(err));
353 if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &periods, &period_size)) < 0) {
354 pa_log(__FILE__": Failed to set hardware parameters: %s", snd_strerror(err));
358 if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0) {
359 pa_log(__FILE__": Error opening mixer: %s", snd_strerror(err));
363 if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
364 !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture"))) {
365 snd_mixer_close(u->mixer_handle);
366 u->mixer_handle = NULL;
369 u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map);
372 u->source->userdata = u;
373 u->source->get_latency = source_get_latency_cb;
374 if (u->mixer_handle) {
375 assert(u->mixer_elem);
376 if (snd_mixer_selem_has_capture_volume(u->mixer_elem)) {
379 for (i = 0;i < ss.channels;i++) {
380 if (!snd_mixer_selem_has_capture_channel(u->mixer_elem, i))
384 if (i == ss.channels) {
385 u->source->get_hw_volume = source_get_hw_volume_cb;
386 u->source->set_hw_volume = source_set_hw_volume_cb;
387 snd_mixer_selem_get_capture_volume_range(
388 u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max);
391 if (snd_mixer_selem_has_capture_switch(u->mixer_elem)) {
392 u->source->get_hw_mute = source_get_hw_mute_cb;
393 u->source->set_hw_mute = source_set_hw_mute_cb;
396 pa_source_set_owner(u->source, m);
397 u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev, snd_pcm_info_get_name(pcm_info));
399 u->pcm_fdl = pa_alsa_fdlist_new();
401 if (pa_alsa_fdlist_init_pcm(u->pcm_fdl, u->pcm_handle, c->mainloop, fdl_callback, u) < 0) {
402 pa_log(__FILE__": failed to initialise file descriptor monitoring");
406 if (u->mixer_handle) {
407 u->mixer_fdl = pa_alsa_fdlist_new();
408 assert(u->mixer_fdl);
409 if (pa_alsa_fdlist_init_mixer(u->mixer_fdl, u->mixer_handle, c->mainloop) < 0) {
410 pa_log(__FILE__": failed to initialise file descriptor monitoring");
413 snd_mixer_elem_set_callback(u->mixer_elem, mixer_callback);
414 snd_mixer_elem_set_callback_private(u->mixer_elem, u);
417 u->frame_size = frame_size;
418 u->fragment_size = period_size * frame_size;
420 pa_log_info(__FILE__": using %u fragments of size %lu bytes.", periods, (long unsigned) u->fragment_size);
422 u->memchunk.memblock = NULL;
423 u->memchunk.index = u->memchunk.length = 0;
425 snd_pcm_start(u->pcm_handle);
429 /* Get initial mixer settings */
430 if (u->source->get_hw_volume)
431 u->source->get_hw_volume(u->source);
432 if (u->source->get_hw_mute)
433 u->source->get_hw_mute(u->source);
440 snd_pcm_info_free(pcm_info);
452 void pa__done(pa_core *c, pa_module*m) {
456 if (!(u = m->userdata))
460 pa_source_disconnect(u->source);
461 pa_source_unref(u->source);
465 pa_alsa_fdlist_free(u->pcm_fdl);
467 pa_alsa_fdlist_free(u->mixer_fdl);
470 snd_mixer_close(u->mixer_handle);
473 snd_pcm_drop(u->pcm_handle);
474 snd_pcm_close(u->pcm_handle);
477 if (u->memchunk.memblock)
478 pa_memblock_unref(u->memchunk.memblock);