1 /* ALSA mixer implementation.
2 * Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * SECTION:element-alsamixer
22 * @see_also: alsasink, alsasrc
24 * This element controls various aspects such as the volume and balance
25 * of an audio device using the ALSA api.
27 * The application should query and use the interfaces provided by this
28 * element to control the device.
30 * Last reviewed on 2006-03-01 (0.10.4)
37 #include "gstalsamixer.h"
40 static void gst_alsa_mixer_update_option (GstAlsaMixer * mixer,
41 GstAlsaMixerOptions * alsa_opts);
42 static void gst_alsa_mixer_update_track (GstAlsaMixer * mixer,
43 GstAlsaMixerTrack * alsa_track);
44 static int gst_alsa_mixer_handle_callback (snd_mixer_t * handle,
45 unsigned int mask, snd_mixer_elem_t * elem);
47 /* First some utils, then the mixer implementation */
49 gst_alsa_mixer_open (GstAlsaMixer * mixer)
53 snd_ctl_card_info_t *card_info;
55 g_return_val_if_fail (mixer->handle == NULL, FALSE);
57 /* open and initialize the mixer device */
58 err = snd_mixer_open (&mixer->handle, 0);
59 if (err < 0 || mixer->handle == NULL)
62 if ((err = snd_mixer_attach (mixer->handle, mixer->device)) < 0) {
63 GST_WARNING ("Cannot open mixer for sound device '%s': %s", mixer->device,
68 if ((err = snd_mixer_selem_register (mixer->handle, NULL, NULL)) < 0) {
69 GST_WARNING ("Cannot register mixer elements: %s", snd_strerror (err));
73 if ((err = snd_mixer_load (mixer->handle)) < 0) {
74 GST_WARNING ("Cannot load mixer settings: %s", snd_strerror (err));
78 snd_mixer_set_callback_private (mixer->handle, mixer);
79 snd_mixer_set_callback (mixer->handle, gst_alsa_mixer_handle_callback);
81 /* now get the device name, any of this is not fatal */
82 g_free (mixer->cardname);
83 if ((err = snd_ctl_open (&ctl, mixer->device, 0)) < 0) {
84 GST_WARNING ("Cannot open CTL: %s", snd_strerror (err));
88 snd_ctl_card_info_malloc (&card_info);
89 if ((err = snd_ctl_card_info (ctl, card_info)) < 0) {
90 GST_WARNING ("Cannot get card info: %s", snd_strerror (err));
95 mixer->cardname = g_strdup (snd_ctl_card_info_get_name (card_info));
96 GST_DEBUG ("Card name = %s", GST_STR_NULL (mixer->cardname));
97 snd_ctl_card_info_free (card_info);
101 if (mixer->cardname == NULL) {
102 mixer->cardname = g_strdup ("Unknown");
103 GST_DEBUG ("Cannot find card name");
106 GST_INFO ("Successfully opened mixer for device '%s'.", mixer->device);
113 GST_WARNING ("Cannot open mixer: %s", snd_strerror (err));
114 mixer->handle = NULL;
119 snd_mixer_close (mixer->handle);
120 mixer->handle = NULL;
125 static snd_mixer_elem_t *
126 gst_alsa_mixer_find_master_mixer (GstAlsaMixer * mixer, snd_mixer_t * handle)
128 snd_mixer_elem_t *element;
131 count = snd_mixer_get_count (handle);
133 g_static_rec_mutex_lock (mixer->rec_mutex);
135 /* Check if we have a playback mixer labelled as 'Master' */
136 element = snd_mixer_first_elem (handle);
137 for (i = 0; i < count; i++) {
138 if (snd_mixer_selem_has_playback_volume (element) &&
139 strcmp (snd_mixer_selem_get_name (element), "Master") == 0) {
140 g_static_rec_mutex_unlock (mixer->rec_mutex);
143 element = snd_mixer_elem_next (element);
146 /* If not, check if we have a playback mixer labelled as 'Front' */
147 element = snd_mixer_first_elem (handle);
148 for (i = 0; i < count; i++) {
149 if (snd_mixer_selem_has_playback_volume (element) &&
150 strcmp (snd_mixer_selem_get_name (element), "Front") == 0) {
151 g_static_rec_mutex_unlock (mixer->rec_mutex);
154 element = snd_mixer_elem_next (element);
157 /* If not, check if we have a playback mixer labelled as 'PCM' */
158 element = snd_mixer_first_elem (handle);
159 for (i = 0; i < count; i++) {
160 if (snd_mixer_selem_has_playback_volume (element) &&
161 strcmp (snd_mixer_selem_get_name (element), "PCM") == 0) {
162 g_static_rec_mutex_unlock (mixer->rec_mutex);
165 element = snd_mixer_elem_next (element);
168 /* If not, check if we have a playback mixer labelled as 'Speaker' */
169 element = snd_mixer_first_elem (handle);
170 for (i = 0; i < count; i++) {
171 if (snd_mixer_selem_has_playback_volume (element) &&
172 strcmp (snd_mixer_selem_get_name (element), "Speaker") == 0) {
173 g_static_rec_mutex_unlock (mixer->rec_mutex);
176 element = snd_mixer_elem_next (element);
179 /* If not, check if we have a playback mixer with both volume and switch that
181 element = snd_mixer_first_elem (handle);
182 for (i = 0; i < count; i++) {
183 if (snd_mixer_selem_has_playback_volume (element) &&
184 snd_mixer_selem_has_playback_switch (element) &&
185 !snd_mixer_selem_is_playback_mono (element)) {
186 g_static_rec_mutex_unlock (mixer->rec_mutex);
189 element = snd_mixer_elem_next (element);
192 /* If not, check if we have any playback mixer with both volume and switch */
193 element = snd_mixer_first_elem (handle);
194 for (i = 0; i < count; i++) {
195 if (snd_mixer_selem_has_playback_volume (element) &&
196 snd_mixer_selem_has_playback_switch (element)) {
197 g_static_rec_mutex_unlock (mixer->rec_mutex);
200 element = snd_mixer_elem_next (element);
203 /* If not, take any playback mixer with a volume control */
204 element = snd_mixer_first_elem (handle);
205 for (i = 0; i < count; i++) {
206 if (snd_mixer_selem_has_playback_volume (element)) {
207 g_static_rec_mutex_unlock (mixer->rec_mutex);
210 element = snd_mixer_elem_next (element);
213 g_static_rec_mutex_unlock (mixer->rec_mutex);
214 /* Looks like we're out of luck ... */
219 gst_alsa_mixer_update (GstAlsaMixer * mixer, snd_mixer_elem_t * elem)
223 g_return_if_fail (mixer != NULL);
225 g_static_rec_mutex_lock (mixer->rec_mutex);
227 for (item = mixer->tracklist; item != NULL; item = item->next) {
228 if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
229 if (elem && (GST_ALSA_MIXER_TRACK (item->data)->element != elem))
232 gst_alsa_mixer_update_track (mixer, GST_ALSA_MIXER_TRACK (item->data));
233 } else if (GST_IS_ALSA_MIXER_OPTIONS (item->data)) {
234 if (elem && (GST_ALSA_MIXER_OPTIONS (item->data)->element != elem))
237 gst_alsa_mixer_update_option (mixer, GST_ALSA_MIXER_OPTIONS (item->data));
241 g_static_rec_mutex_unlock (mixer->rec_mutex);
245 gst_alsa_mixer_elem_handle_callback (snd_mixer_elem_t * elem, unsigned int mask)
247 GstAlsaMixer *mixer =
248 (GstAlsaMixer *) snd_mixer_elem_get_callback_private (elem);
250 GST_LOG ("ALSA elem cb");
252 g_return_val_if_fail (mixer != NULL, 1);
254 gst_alsa_mixer_update (mixer, elem);
260 gst_alsa_mixer_handle_callback (snd_mixer_t * handle, unsigned int mask,
261 snd_mixer_elem_t * elem)
263 GstAlsaMixer *mixer =
264 (GstAlsaMixer *) snd_mixer_get_callback_private (handle);
268 g_return_val_if_fail (mixer != NULL, 1);
270 /* Hopefully won't be call recursively and will handle pending elem events */
271 snd_mixer_handle_events (mixer->handle);
273 gst_alsa_mixer_update (mixer, elem);
279 gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
282 snd_mixer_elem_t *element, *master;
285 g_return_if_fail (mixer->handle != NULL);
287 if (mixer->tracklist)
290 g_static_rec_mutex_lock (mixer->rec_mutex);
292 master = gst_alsa_mixer_find_master_mixer (mixer, mixer->handle);
294 count = snd_mixer_get_count (mixer->handle);
295 element = snd_mixer_first_elem (mixer->handle);
299 * Some ALSA tracks may have playback and capture capabilities.
300 * Here we model them as two separate GStreamer tracks.
303 for (i = 0; i < count; i++) {
304 GstMixerTrack *play_track = NULL;
305 GstMixerTrack *cap_track = NULL;
310 name = snd_mixer_selem_get_name (element);
312 /* prevent dup names */
313 for (item = mixer->tracklist; item != NULL; item = item->next) {
314 snd_mixer_elem_t *temp;
316 if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
317 temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
319 temp = GST_ALSA_MIXER_TRACK (item->data)->element;
321 if (strcmp (name, snd_mixer_selem_get_name (temp)) == 0)
325 GST_LOG ("[%s] probing element #%u, mixer->dir=%u", name, i, mixer->dir);
327 if (mixer->dir & GST_ALSA_MIXER_PLAYBACK) {
328 gboolean has_playback_switch, has_playback_volume;
330 has_playback_switch = snd_mixer_selem_has_playback_switch (element);
331 has_playback_volume = snd_mixer_selem_has_playback_volume (element);
333 GST_LOG ("[%s] PLAYBACK: has_playback_volume=%d, has_playback_switch=%d"
334 "%s", name, has_playback_volume, has_playback_switch,
335 (element == master) ? " MASTER" : "");
337 if (has_playback_volume) {
338 gint flags = GST_MIXER_TRACK_OUTPUT;
340 if (element == master)
341 flags |= GST_MIXER_TRACK_MASTER;
343 play_track = gst_alsa_mixer_track_new (element, samename, i,
344 flags, FALSE, NULL, FALSE);
346 } else if (has_playback_switch) {
347 /* simple mute switch */
348 play_track = gst_alsa_mixer_track_new (element, samename, i,
349 GST_MIXER_TRACK_OUTPUT, TRUE, NULL, FALSE);
352 if (snd_mixer_selem_is_enumerated (element)) {
353 GstMixerOptions *opts = gst_alsa_mixer_options_new (element, i);
355 GST_LOG ("[%s] is enumerated (%d)", name, i);
356 mixer->tracklist = g_list_append (mixer->tracklist, opts);
360 if (mixer->dir & GST_ALSA_MIXER_CAPTURE) {
361 gboolean has_capture_switch, has_common_switch;
362 gboolean has_capture_volume, has_common_volume;
364 has_capture_switch = snd_mixer_selem_has_capture_switch (element);
365 has_common_switch = snd_mixer_selem_has_common_switch (element);
366 has_capture_volume = snd_mixer_selem_has_capture_volume (element);
367 has_common_volume = snd_mixer_selem_has_common_volume (element);
369 GST_LOG ("[%s] CAPTURE: has_capture_volume=%d, has_common_volume=%d, "
370 "has_capture_switch=%d, has_common_switch=%d, play_track=%p", name,
371 has_capture_volume, has_common_volume, has_capture_switch,
372 has_common_switch, play_track);
374 if (has_capture_volume && !(play_track && has_common_volume)) {
375 cap_track = gst_alsa_mixer_track_new (element, samename, i,
376 GST_MIXER_TRACK_INPUT, FALSE, NULL, play_track != NULL);
377 } else if (has_capture_switch && !(play_track && has_common_switch)) {
378 cap_track = gst_alsa_mixer_track_new (element, samename, i,
379 GST_MIXER_TRACK_INPUT, TRUE, NULL, play_track != NULL);
384 if (play_track && cap_track) {
385 GST_ALSA_MIXER_TRACK (play_track)->shared_mute =
386 GST_ALSA_MIXER_TRACK (cap_track);
387 GST_ALSA_MIXER_TRACK (cap_track)->shared_mute =
388 GST_ALSA_MIXER_TRACK (play_track);
392 mixer->tracklist = g_list_append (mixer->tracklist, play_track);
395 mixer->tracklist = g_list_append (mixer->tracklist, cap_track);
397 element = snd_mixer_elem_next (element);
400 for (item = mixer->tracklist; item != NULL; item = item->next) {
401 snd_mixer_elem_t *temp;
403 if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
404 temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
406 temp = GST_ALSA_MIXER_TRACK (item->data)->element;
408 snd_mixer_elem_set_callback (temp, gst_alsa_mixer_elem_handle_callback);
409 snd_mixer_elem_set_callback_private (temp, mixer);
412 g_static_rec_mutex_unlock (mixer->rec_mutex);
416 task_monitor_alsa (gpointer data)
420 unsigned short revents;
421 GstAlsaMixer *mixer = (GstAlsaMixer *) data;
424 g_static_rec_mutex_lock (mixer->rec_mutex);
426 nfds = snd_mixer_poll_descriptors_count (mixer->handle);
428 GST_ERROR ("snd_mixer_poll_descriptors_count <= 0: %d", nfds);
429 /* FIXME: sleep ? stop monitoring ? */
430 g_static_rec_mutex_unlock (mixer->rec_mutex);
434 pfds = g_newa (struct pollfd, nfds + 1);
435 rnfds = snd_mixer_poll_descriptors (mixer->handle, pfds, nfds);
436 g_assert (rnfds <= nfds);
439 GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), ("alsa error: %s",
440 snd_strerror (rnfds)));
441 gst_task_pause (mixer->task);
442 g_static_rec_mutex_unlock (mixer->rec_mutex);
446 pfds[rnfds].fd = mixer->pfd[0];
447 pfds[rnfds].events = POLLIN | POLLPRI | POLLHUP | POLLERR;
448 pfds[rnfds].revents = 0;
450 g_static_rec_mutex_unlock (mixer->rec_mutex);
452 GST_LOG ("task loop");
453 ret = poll (pfds, rnfds + 1, -1);
456 GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
457 gst_task_pause (mixer->task);
461 g_static_rec_mutex_lock (mixer->rec_mutex);
464 snd_mixer_poll_descriptors_revents (mixer->handle, pfds, nfds, &revents);
466 GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), ("alsa error: %s",
467 snd_strerror (ret)));
468 gst_task_pause (mixer->task);
469 } else if (revents & (POLLIN | POLLPRI)) {
470 GST_DEBUG ("Handling events");
471 snd_mixer_handle_events (mixer->handle);
472 } else if (revents & (POLLERR | POLLNVAL | POLLHUP)) {
473 GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), (NULL));
474 gst_task_pause (mixer->task);
477 g_static_rec_mutex_unlock (mixer->rec_mutex);
483 gst_alsa_mixer_new (const char *device, GstAlsaMixerDirection dir)
485 GstAlsaMixer *ret = NULL;
487 g_return_val_if_fail (device != NULL, NULL);
489 ret = g_new0 (GstAlsaMixer, 1);
491 if (pipe (ret->pfd) == -1)
494 ret->rec_mutex = g_new (GStaticRecMutex, 1);
495 g_static_rec_mutex_init (ret->rec_mutex);
497 ret->task_mutex = g_new (GStaticRecMutex, 1);
498 g_static_rec_mutex_init (ret->task_mutex);
500 ret->task = gst_task_create (task_monitor_alsa, ret);
501 gst_task_set_lock (ret->task, ret->task_mutex);
503 ret->device = g_strdup (device);
506 if (!gst_alsa_mixer_open (ret))
509 if (gst_task_start (ret->task) == FALSE) {
510 GST_WARNING ("Could not start alsamixer task");
518 gst_alsa_mixer_free (ret);
524 gst_alsa_mixer_free (GstAlsaMixer * mixer)
526 g_return_if_fail (mixer != NULL);
529 if (write (mixer->pfd[1], "stop", 5) <= 0) {
530 GST_ERROR ("Cannot send " "stop" " to alsamixer task");
531 close (mixer->pfd[1]);
535 if (gst_task_join (mixer->task) == FALSE) {
536 GST_ERROR ("Cannot join alsamixer task");
539 gst_object_unref (mixer->task);
543 g_static_rec_mutex_free (mixer->task_mutex);
544 g_free (mixer->task_mutex);
545 mixer->task_mutex = NULL;
547 if (mixer->pfd[0] > 0) {
548 close (mixer->pfd[0]);
552 if (mixer->pfd[1] > 0) {
553 close (mixer->pfd[1]);
557 if (mixer->interface) {
558 g_object_unref (G_OBJECT (mixer->interface));
559 mixer->interface = NULL;
563 g_free (mixer->device);
564 mixer->device = NULL;
567 if (mixer->cardname) {
568 g_free (mixer->cardname);
569 mixer->cardname = NULL;
572 if (mixer->tracklist) {
573 g_list_foreach (mixer->tracklist, (GFunc) g_object_unref, NULL);
574 g_list_free (mixer->tracklist);
575 mixer->tracklist = NULL;
579 snd_mixer_close (mixer->handle);
580 mixer->handle = NULL;
583 g_static_rec_mutex_free (mixer->rec_mutex);
584 g_free (mixer->rec_mutex);
585 mixer->rec_mutex = NULL;
591 gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer)
593 g_return_val_if_fail (mixer->handle != NULL, NULL);
595 gst_alsa_mixer_ensure_track_list (mixer);
597 return (const GList *) mixer->tracklist;
601 gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
605 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
607 g_return_if_fail (mixer->handle != NULL);
609 g_static_rec_mutex_lock (mixer->rec_mutex);
611 gst_alsa_mixer_track_update (alsa_track);
613 if (track->flags & GST_MIXER_TRACK_OUTPUT) { /* return playback volume */
615 /* Is emulated mute flag activated? */
616 if (track->flags & GST_MIXER_TRACK_MUTE &&
617 !(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) {
618 for (i = 0; i < track->num_channels; i++)
619 volumes[i] = alsa_track->volumes[i];
621 for (i = 0; i < track->num_channels; i++) {
624 snd_mixer_selem_get_playback_volume (alsa_track->element, i, &tmp);
625 alsa_track->volumes[i] = volumes[i] = (gint) tmp;
629 } else if (track->flags & GST_MIXER_TRACK_INPUT) { /* return capture volume */
631 /* Is emulated record flag activated? */
632 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH ||
633 track->flags & GST_MIXER_TRACK_RECORD) {
634 for (i = 0; i < track->num_channels; i++) {
637 snd_mixer_selem_get_capture_volume (alsa_track->element, i, &tmp);
638 alsa_track->volumes[i] = volumes[i] = (gint) tmp;
641 for (i = 0; i < track->num_channels; i++)
642 volumes[i] = alsa_track->volumes[i];
645 g_static_rec_mutex_unlock (mixer->rec_mutex);
649 check_if_volumes_are_the_same (guint num_channels, gint * volumes)
653 if (num_channels <= 1)
656 for (i = 1; i < num_channels; i++) {
657 if (volumes[i] != volumes[0])
665 gst_alsa_mixer_set_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
668 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
671 g_return_if_fail (mixer->handle != NULL);
673 g_static_rec_mutex_lock (mixer->rec_mutex);
675 gst_alsa_mixer_track_update (alsa_track);
677 if (track->flags & GST_MIXER_TRACK_OUTPUT) {
679 /* Is emulated mute flag activated? */
680 if (track->flags & GST_MIXER_TRACK_MUTE &&
681 !(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) {
682 for (i = 0; i < track->num_channels; i++)
683 alsa_track->volumes[i] = volumes[i];
685 if (check_if_volumes_are_the_same (track->num_channels, volumes)) {
686 snd_mixer_selem_set_playback_volume_all (alsa_track->element,
688 for (i = 0; i < track->num_channels; i++)
689 alsa_track->volumes[i] = volumes[0];
691 for (i = 0; i < track->num_channels; i++) {
692 alsa_track->volumes[i] = volumes[i];
693 snd_mixer_selem_set_playback_volume (alsa_track->element, i,
699 } else if (track->flags & GST_MIXER_TRACK_INPUT) {
701 /* Is emulated record flag activated? */
702 if (track->flags & GST_MIXER_TRACK_RECORD ||
703 alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) {
704 if (check_if_volumes_are_the_same (track->num_channels, volumes)) {
705 snd_mixer_selem_set_capture_volume_all (alsa_track->element,
707 for (i = 0; i < track->num_channels; i++)
708 alsa_track->volumes[i] = volumes[0];
710 for (i = 0; i < track->num_channels; i++) {
711 alsa_track->volumes[i] = volumes[i];
712 snd_mixer_selem_set_capture_volume (alsa_track->element, i,
717 for (i = 0; i < track->num_channels; i++)
718 alsa_track->volumes[i] = volumes[i];
721 g_static_rec_mutex_unlock (mixer->rec_mutex);
725 gst_alsa_mixer_set_mute (GstAlsaMixer * mixer, GstMixerTrack * track,
728 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
730 g_return_if_fail (mixer->handle != NULL);
732 g_static_rec_mutex_lock (mixer->rec_mutex);
734 gst_alsa_mixer_track_update (alsa_track);
736 if (! !(mute) == ! !(track->flags & GST_MIXER_TRACK_MUTE)) {
737 g_static_rec_mutex_unlock (mixer->rec_mutex);
741 track->flags |= GST_MIXER_TRACK_MUTE;
743 if (alsa_track->shared_mute)
744 ((GstMixerTrack *) (alsa_track->shared_mute))->flags |=
745 GST_MIXER_TRACK_MUTE;
747 track->flags &= ~GST_MIXER_TRACK_MUTE;
749 if (alsa_track->shared_mute)
750 ((GstMixerTrack *) (alsa_track->shared_mute))->flags &=
751 ~GST_MIXER_TRACK_MUTE;
754 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH) {
755 snd_mixer_selem_set_playback_switch_all (alsa_track->element, mute ? 0 : 1);
758 GstAlsaMixerTrack *ctrl_track;
760 if ((track->flags & GST_MIXER_TRACK_INPUT)
761 && alsa_track->shared_mute != NULL)
762 ctrl_track = alsa_track->shared_mute;
764 ctrl_track = alsa_track;
766 for (i = 0; i < ((GstMixerTrack *) ctrl_track)->num_channels; i++) {
768 mute ? ((GstMixerTrack *) ctrl_track)->
769 min_volume : ctrl_track->volumes[i];
770 snd_mixer_selem_set_playback_volume (ctrl_track->element, i, vol);
773 g_static_rec_mutex_unlock (mixer->rec_mutex);
777 gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
778 GstMixerTrack * track, gboolean record)
780 GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
782 g_return_if_fail (mixer->handle != NULL);
784 g_static_rec_mutex_lock (mixer->rec_mutex);
786 gst_alsa_mixer_track_update (alsa_track);
788 if (! !(record) == ! !(track->flags & GST_MIXER_TRACK_RECORD)) {
789 g_static_rec_mutex_unlock (mixer->rec_mutex);
794 track->flags |= GST_MIXER_TRACK_RECORD;
796 track->flags &= ~GST_MIXER_TRACK_RECORD;
799 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) {
800 snd_mixer_selem_set_capture_switch_all (alsa_track->element,
803 /* update all tracks in same exlusive cswitch group */
804 if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL) {
807 for (item = mixer->tracklist; item != NULL; item = item->next) {
809 if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
810 GstAlsaMixerTrack *item_alsa_track =
811 GST_ALSA_MIXER_TRACK (item->data);
813 if (item_alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL &&
814 item_alsa_track->capture_group == alsa_track->capture_group) {
815 gst_alsa_mixer_track_update (item_alsa_track);
823 for (i = 0; i < track->num_channels; i++) {
824 long vol = record ? alsa_track->volumes[i] : track->min_volume;
826 snd_mixer_selem_set_capture_volume (alsa_track->element, i, vol);
829 g_static_rec_mutex_unlock (mixer->rec_mutex);
833 gst_alsa_mixer_set_option (GstAlsaMixer * mixer,
834 GstMixerOptions * opts, gchar * value)
836 gint idx = -1, n = 0;
838 GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts);
840 g_return_if_fail (mixer->handle != NULL);
842 for (item = opts->values; item != NULL; item = item->next, n++) {
843 if (!strcmp (item->data, value)) {
851 g_static_rec_mutex_lock (mixer->rec_mutex);
852 snd_mixer_selem_set_enum_item (alsa_opts->element, 0, idx);
853 g_static_rec_mutex_unlock (mixer->rec_mutex);
857 gst_alsa_mixer_get_option (GstAlsaMixer * mixer, GstMixerOptions * opts)
861 GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts);
863 g_return_val_if_fail (mixer->handle != NULL, NULL);
864 g_static_rec_mutex_lock (mixer->rec_mutex);
865 ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
866 g_static_rec_mutex_unlock (mixer->rec_mutex);
868 return g_list_nth_data (opts->values, idx);
870 return snd_strerror (ret); /* feeble attempt at error handling */
874 gst_alsa_mixer_get_mixer_flags (GstAlsaMixer * mixer)
876 g_return_val_if_fail (mixer != NULL, GST_MIXER_FLAG_NONE);
878 return GST_MIXER_FLAG_AUTO_NOTIFICATIONS;
882 gst_alsa_mixer_update_option (GstAlsaMixer * mixer,
883 GstAlsaMixerOptions * alsa_opts)
887 /* const */ gchar *option;
889 if (mixer->interface == NULL) {
890 GST_WARNING ("Cannot send update notifications, no GstMixer * given");
893 g_static_rec_mutex_lock (mixer->rec_mutex);
894 ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
895 g_static_rec_mutex_unlock (mixer->rec_mutex);
897 option = g_list_nth_data (GST_MIXER_OPTIONS (alsa_opts)->values, idx);
898 gst_mixer_option_changed (mixer->interface, GST_MIXER_OPTIONS (alsa_opts),
904 gst_alsa_mixer_update_track (GstAlsaMixer * mixer,
905 GstAlsaMixerTrack * alsa_track)
907 GstMixerTrack *track = (GstMixerTrack *) alsa_track;
913 GST_DEBUG ("Updating track %" GST_PTR_FORMAT, alsa_track);
915 if (mixer->interface == NULL) {
916 GST_WARNING ("Cannot send update notifications, no GstMixer * given");
920 old_mute = ! !(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE));
921 old_record = ! !(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD));
922 old_volumes = g_new (gint, track->num_channels);
923 n_channels = track->num_channels;
924 memcpy (old_volumes, alsa_track->volumes,
925 sizeof (gint) * track->num_channels);
927 gst_alsa_mixer_track_update (alsa_track);
930 ! !(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD))) {
931 gst_mixer_record_toggled (mixer->interface, track,
932 ! !GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD));
934 if (old_mute != ! !(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE))) {
935 gst_mixer_mute_toggled (mixer->interface, track,
936 ! !GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE));
939 n_channels = MIN (n_channels, track->num_channels);
940 for (i = 0; i < n_channels; i++) {
941 if (old_volumes[i] != alsa_track->volumes[i]) {
942 gst_mixer_volume_changed (mixer->interface, track, alsa_track->volumes);
946 g_free (old_volumes);
949 /* utility function for gstalsamixerelement to set the interface */
951 _gst_alsa_mixer_set_interface (GstAlsaMixer * mixer, GstMixer * interface)
953 g_return_if_fail (mixer != NULL && mixer->interface == NULL);
954 g_return_if_fail (interface != NULL);
956 mixer->interface = g_object_ref (G_OBJECT (interface));