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)
54 "sink_name=<name for the sink> "
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;
73 pa_memchunk memchunk, silence;
77 static const char* const valid_modargs[] = {
89 #define DEFAULT_SINK_NAME "alsa_output"
90 #define DEFAULT_DEVICE "default"
92 static void update_usage(struct userdata *u) {
93 pa_module_set_used(u->module,
94 (u->sink ? pa_idxset_size(u->sink->inputs) : 0) +
95 (u->sink ? pa_idxset_size(u->sink->monitor_source->outputs) : 0));
98 static void xrun_recovery(struct userdata *u) {
101 pa_log(__FILE__": *** ALSA-XRUN (playback) ***");
103 if (snd_pcm_prepare(u->pcm_handle) < 0)
104 pa_log(__FILE__": snd_pcm_prepare() failed");
107 static void do_write(struct userdata *u) {
113 pa_memchunk *memchunk = NULL;
114 snd_pcm_sframes_t frames;
116 if (u->memchunk.memblock)
117 memchunk = &u->memchunk;
119 if (pa_sink_render(u->sink, u->fragment_size, &u->memchunk) < 0)
120 memchunk = &u->silence;
122 memchunk = &u->memchunk;
125 assert(memchunk->memblock && memchunk->memblock->data && memchunk->length && memchunk->memblock->length && (memchunk->length % u->frame_size) == 0);
127 if ((frames = snd_pcm_writei(u->pcm_handle, (uint8_t*) memchunk->memblock->data + memchunk->index, memchunk->length / u->frame_size)) < 0) {
128 if (frames == -EAGAIN)
131 if (frames == -EPIPE) {
136 pa_log(__FILE__": snd_pcm_writei() failed: %s", snd_strerror(frames));
140 if (memchunk == &u->memchunk) {
141 size_t l = frames * u->frame_size;
142 memchunk->index += l;
143 memchunk->length -= l;
145 if (memchunk->length == 0) {
146 pa_memblock_unref(memchunk->memblock);
147 memchunk->memblock = NULL;
148 memchunk->index = 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->sink->get_hw_volume)
173 u->sink->get_hw_volume(u->sink);
174 if (u->sink->get_hw_mute)
175 u->sink->get_hw_mute(u->sink);
176 pa_subscription_post(u->sink->core,
177 PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE,
184 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
186 struct userdata *u = s->userdata;
187 snd_pcm_sframes_t frames;
190 assert(s && u && u->sink);
192 if ((err = snd_pcm_delay(u->pcm_handle, &frames)) < 0) {
193 pa_log(__FILE__": failed to get delay: %s", snd_strerror(err));
194 s->get_latency = NULL;
201 r += pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
203 if (u->memchunk.memblock)
204 r += pa_bytes_to_usec(u->memchunk.length, &s->sample_spec);
209 static int sink_get_hw_volume_cb(pa_sink *s) {
210 struct userdata *u = s->userdata;
215 assert(u && u->mixer_elem);
217 for (i = 0;i < s->hw_volume.channels;i++) {
218 assert(snd_mixer_selem_has_playback_channel(u->mixer_elem, i));
220 err = snd_mixer_selem_get_playback_volume(u->mixer_elem, i, &vol);
223 s->hw_volume.values[i] =
224 (vol - u->hw_volume_min) * PA_VOLUME_NORM / (u->hw_volume_max - u->hw_volume_min);
230 pa_log_error(__FILE__": Unable to read volume: %s", snd_strerror(err));
231 s->get_hw_volume = NULL;
232 s->set_hw_volume = NULL;
236 static int sink_set_hw_volume_cb(pa_sink *s) {
237 struct userdata *u = s->userdata;
242 assert(u && u->mixer_elem);
244 for (i = 0;i < s->hw_volume.channels;i++) {
245 assert(snd_mixer_selem_has_playback_channel(u->mixer_elem, i));
247 vol = s->hw_volume.values[i];
249 if (vol > PA_VOLUME_NORM)
250 vol = PA_VOLUME_NORM;
252 vol = (vol * (u->hw_volume_max - u->hw_volume_min)) /
253 PA_VOLUME_NORM + u->hw_volume_min;
255 err = snd_mixer_selem_set_playback_volume(u->mixer_elem, i, vol);
263 pa_log_error(__FILE__": Unable to set volume: %s", snd_strerror(err));
264 s->get_hw_volume = NULL;
265 s->set_hw_volume = NULL;
269 static int sink_get_hw_mute_cb(pa_sink *s) {
270 struct userdata *u = s->userdata;
273 assert(u && u->mixer_elem);
275 err = snd_mixer_selem_get_playback_switch(u->mixer_elem, 0, &sw);
277 pa_log_error(__FILE__": Unable to get switch: %s", snd_strerror(err));
278 s->get_hw_mute = NULL;
279 s->set_hw_mute = NULL;
288 static int sink_set_hw_mute_cb(pa_sink *s) {
289 struct userdata *u = s->userdata;
292 assert(u && u->mixer_elem);
294 err = snd_mixer_selem_set_playback_switch_all(u->mixer_elem, !s->hw_muted);
296 pa_log_error(__FILE__": Unable to set switch: %s", snd_strerror(err));
297 s->get_hw_mute = NULL;
298 s->set_hw_mute = NULL;
305 int pa__init(pa_core *c, pa_module*m) {
306 pa_modargs *ma = NULL;
308 struct userdata *u = NULL;
312 uint32_t periods, fragsize;
313 snd_pcm_uframes_t period_size;
315 snd_pcm_info_t *pcm_info = NULL;
318 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
319 pa_log(__FILE__": failed to parse module arguments");
323 ss = c->default_sample_spec;
324 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map) < 0) {
325 pa_log(__FILE__": failed to parse sample specification");
328 frame_size = pa_frame_size(&ss);
332 if (pa_modargs_get_value_u32(ma, "fragments", &periods) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &fragsize) < 0) {
333 pa_log(__FILE__": failed to parse buffer metrics");
336 period_size = fragsize;
338 u = pa_xmalloc0(sizeof(struct userdata));
342 snd_config_update_free_global();
343 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) {
344 pa_log(__FILE__": Error opening PCM device %s: %s", dev, snd_strerror(err));
348 if ((err = snd_pcm_info_malloc(&pcm_info)) < 0 ||
349 (err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) {
350 pa_log(__FILE__": Error fetching PCM info: %s", snd_strerror(err));
354 if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &periods, &period_size)) < 0) {
355 pa_log(__FILE__": Failed to set hardware parameters: %s", snd_strerror(err));
359 if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0) {
360 pa_log(__FILE__": Error opening mixer: %s", snd_strerror(err));
364 if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
365 !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "PCM"))) {
366 snd_mixer_close(u->mixer_handle);
367 u->mixer_handle = NULL;
370 u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map);
373 u->sink->get_latency = sink_get_latency_cb;
374 if (u->mixer_handle) {
375 assert(u->mixer_elem);
376 if (snd_mixer_selem_has_playback_volume(u->mixer_elem)) {
379 for (i = 0;i < ss.channels;i++) {
380 if (!snd_mixer_selem_has_playback_channel(u->mixer_elem, i))
384 if (i == ss.channels) {
385 u->sink->get_hw_volume = sink_get_hw_volume_cb;
386 u->sink->set_hw_volume = sink_set_hw_volume_cb;
387 snd_mixer_selem_get_playback_volume_range(
388 u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max);
391 if (snd_mixer_selem_has_playback_switch(u->mixer_elem)) {
392 u->sink->get_hw_mute = sink_get_hw_mute_cb;
393 u->sink->set_hw_mute = sink_set_hw_mute_cb;
396 u->sink->userdata = u;
397 pa_sink_set_owner(u->sink, m);
398 u->sink->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev, snd_pcm_info_get_name(pcm_info));
400 u->pcm_fdl = pa_alsa_fdlist_new();
402 if (pa_alsa_fdlist_init_pcm(u->pcm_fdl, u->pcm_handle, c->mainloop, fdl_callback, u) < 0) {
403 pa_log(__FILE__": failed to initialise file descriptor monitoring");
407 if (u->mixer_handle) {
408 u->mixer_fdl = pa_alsa_fdlist_new();
409 assert(u->mixer_fdl);
410 if (pa_alsa_fdlist_init_mixer(u->mixer_fdl, u->mixer_handle, c->mainloop) < 0) {
411 pa_log(__FILE__": failed to initialise file descriptor monitoring");
414 snd_mixer_elem_set_callback(u->mixer_elem, mixer_callback);
415 snd_mixer_elem_set_callback_private(u->mixer_elem, u);
418 u->frame_size = frame_size;
419 u->fragment_size = period_size;
421 pa_log_info(__FILE__": using %u fragments of size %lu bytes.", periods, (long unsigned)u->fragment_size);
423 u->silence.memblock = pa_memblock_new(u->silence.length = u->fragment_size, c->memblock_stat);
424 assert(u->silence.memblock);
425 pa_silence_memblock(u->silence.memblock, &ss);
426 u->silence.index = 0;
428 u->memchunk.memblock = NULL;
429 u->memchunk.index = u->memchunk.length = 0;
433 /* Get initial mixer settings */
434 if (u->sink->get_hw_volume)
435 u->sink->get_hw_volume(u->sink);
436 if (u->sink->get_hw_mute)
437 u->sink->get_hw_mute(u->sink);
444 snd_pcm_info_free(pcm_info);
456 void pa__done(pa_core *c, pa_module*m) {
460 if (!(u = m->userdata))
464 pa_sink_disconnect(u->sink);
465 pa_sink_unref(u->sink);
469 pa_alsa_fdlist_free(u->pcm_fdl);
471 pa_alsa_fdlist_free(u->mixer_fdl);
474 snd_mixer_close(u->mixer_handle);
477 snd_pcm_drop(u->pcm_handle);
478 snd_pcm_close(u->pcm_handle);
481 if (u->memchunk.memblock)
482 pa_memblock_unref(u->memchunk.memblock);
483 if (u->silence.memblock)
484 pa_memblock_unref(u->silence.memblock);