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Original commit message from CVS: * docs/libs/gst-plugins-base-libs-sections.txt: * ext/alsa/gstalsamixer.c: * ext/alsa/gstalsamixer.h: * ext/alsa/gstalsamixerelement.c: * ext/alsa/gstalsamixertrack.c: * gst-libs/gst/interfaces/mixer.c: * gst-libs/gst/interfaces/mixer.h: * gst-libs/gst/interfaces/mixeroptions.c: * gst-libs/gst/interfaces/mixeroptions.h: * gst-libs/gst/interfaces/mixertrack.c: * gst-libs/gst/interfaces/mixertrack.h: * tests/check/Makefile.am: * tests/check/libs/mixer.c: Patch By: Marc-Andre Lureau <marcandre.lureau@gmail.com> Fixes: #152864 Add support for notifying mixer changes on the message bus, and implement it in alsamixer. API: gst_mixer_get_mixer_flags API: gst_mixer_message_parse_mute_toggled API: gst_mixer_message_parse_record_toggled API: gst_mixer_message_parse_volume_changed API: gst_mixer_message_parse_option_changed API: GstMixerMessageType API: GstMixerFlags
845 lines
23 KiB
C
845 lines
23 KiB
C
/* ALSA mixer implementation.
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* Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-alsamixer
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* @short_description: control properties of an audio device
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* @see_also: alsasink, alsasrc
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*
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* <refsect2>
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* <para>
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* This element controls various aspects such as the volume and balance
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* of an audio device using the ALSA api.
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* </para>
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* <para>
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* The application should query and use the interfaces provided by this
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* element to control the device.
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* </para>
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* </refsect2>
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*
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* Last reviewed on 2006-03-01 (0.10.4)
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstalsamixer.h"
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static void gst_alsa_mixer_update_option (GstAlsaMixer * mixer,
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GstAlsaMixerOptions * alsa_opts);
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static void gst_alsa_mixer_update_track (GstAlsaMixer * mixer,
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GstAlsaMixerTrack * alsa_track);
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static int gst_alsa_mixer_handle_callback (snd_mixer_t * handle,
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unsigned int mask, snd_mixer_elem_t * elem);
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/* First some utils, then the mixer implementation */
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static gboolean
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gst_alsa_mixer_open (GstAlsaMixer * mixer)
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{
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gint err;
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snd_ctl_t *ctl;
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snd_ctl_card_info_t *card_info;
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g_return_val_if_fail (mixer->handle == NULL, FALSE);
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/* open and initialize the mixer device */
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err = snd_mixer_open (&mixer->handle, 0);
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if (err < 0 || mixer->handle == NULL)
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goto open_failed;
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if ((err = snd_mixer_attach (mixer->handle, mixer->device)) < 0) {
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GST_WARNING ("Cannot open mixer for sound device '%s': %s", mixer->device,
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snd_strerror (err));
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goto error;
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}
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if ((err = snd_mixer_selem_register (mixer->handle, NULL, NULL)) < 0) {
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GST_WARNING ("Cannot register mixer elements: %s", snd_strerror (err));
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goto error;
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}
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if ((err = snd_mixer_load (mixer->handle)) < 0) {
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GST_WARNING ("Cannot load mixer settings: %s", snd_strerror (err));
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goto error;
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}
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snd_mixer_set_callback_private (mixer->handle, mixer);
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snd_mixer_set_callback (mixer->handle, gst_alsa_mixer_handle_callback);
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/* now get the device name, any of this is not fatal */
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g_free (mixer->cardname);
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if ((err = snd_ctl_open (&ctl, mixer->device, 0)) < 0) {
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GST_WARNING ("Cannot open CTL: %s", snd_strerror (err));
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goto no_card_name;
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}
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snd_ctl_card_info_alloca (&card_info);
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if ((err = snd_ctl_card_info (ctl, card_info)) < 0) {
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GST_WARNING ("Cannot get card info: %s", snd_strerror (err));
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snd_ctl_close (ctl);
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goto no_card_name;
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}
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mixer->cardname = g_strdup (snd_ctl_card_info_get_name (card_info));
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GST_DEBUG ("Card name = %s", GST_STR_NULL (mixer->cardname));
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snd_ctl_close (ctl);
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no_card_name:
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if (mixer->cardname == NULL) {
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mixer->cardname = g_strdup ("Unknown");
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GST_DEBUG ("Cannot find card name");
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}
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GST_INFO ("Successfully opened mixer for device '%s'.", mixer->device);
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return TRUE;
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/* ERROR */
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open_failed:
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{
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GST_WARNING ("Cannot open mixer: %s", snd_strerror (err));
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mixer->handle = NULL;
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return FALSE;
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}
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error:
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{
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snd_mixer_close (mixer->handle);
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mixer->handle = NULL;
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return FALSE;
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}
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}
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static snd_mixer_elem_t *
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gst_alsa_mixer_find_master_mixer (GstAlsaMixer * mixer, snd_mixer_t * handle)
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{
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snd_mixer_elem_t *element;
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gint i, count;
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count = snd_mixer_get_count (handle);
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/* Check if we have a playback mixer labelled as 'Master' */
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element = snd_mixer_first_elem (handle);
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for (i = 0; i < count; i++) {
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if (snd_mixer_selem_has_playback_volume (element) &&
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strcmp (snd_mixer_selem_get_name (element), "Master") == 0) {
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return element;
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}
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element = snd_mixer_elem_next (element);
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}
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/* If not, check if we have a playback mixer labelled as 'Front' */
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element = snd_mixer_first_elem (handle);
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for (i = 0; i < count; i++) {
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if (snd_mixer_selem_has_playback_volume (element) &&
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strcmp (snd_mixer_selem_get_name (element), "Front") == 0) {
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return element;
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}
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element = snd_mixer_elem_next (element);
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}
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/* If not, check if we have a playback mixer with both volume and switch */
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element = snd_mixer_first_elem (handle);
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for (i = 0; i < count; i++) {
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if (snd_mixer_selem_has_playback_volume (element) &&
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snd_mixer_selem_has_playback_switch (element)) {
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return element;
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}
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element = snd_mixer_elem_next (element);
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}
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/* If not, take any playback mixer with a volume control */
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element = snd_mixer_first_elem (handle);
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for (i = 0; i < count; i++) {
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if (snd_mixer_selem_has_playback_volume (element)) {
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return element;
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}
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element = snd_mixer_elem_next (element);
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}
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/* Looks like we're out of luck ... */
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return NULL;
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}
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static void
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gst_alsa_mixer_update (GstAlsaMixer * mixer, snd_mixer_elem_t * elem)
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{
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GList *item;
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g_return_if_fail (mixer != NULL);
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g_static_rec_mutex_lock (mixer->rec_mutex);
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for (item = mixer->tracklist; item != NULL; item = item->next) {
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if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
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if (elem && (GST_ALSA_MIXER_TRACK (item->data)->element != elem))
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continue;
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gst_alsa_mixer_update_track (mixer, GST_ALSA_MIXER_TRACK (item->data));
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} else if (GST_IS_ALSA_MIXER_OPTIONS (item->data)) {
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if (elem && (GST_ALSA_MIXER_OPTIONS (item->data)->element != elem))
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continue;
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gst_alsa_mixer_update_option (mixer, GST_ALSA_MIXER_OPTIONS (item->data));
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}
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}
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g_static_rec_mutex_unlock (mixer->rec_mutex);
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}
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static int
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gst_alsa_mixer_elem_handle_callback (snd_mixer_elem_t * elem, unsigned int mask)
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{
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GstAlsaMixer *mixer =
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(GstAlsaMixer *) snd_mixer_elem_get_callback_private (elem);
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GST_LOG ("ALSA elem cb");
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g_return_val_if_fail (mixer != NULL, 1);
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gst_alsa_mixer_update (mixer, elem);
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return 0;
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}
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static int
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gst_alsa_mixer_handle_callback (snd_mixer_t * handle, unsigned int mask,
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snd_mixer_elem_t * elem)
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{
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GstAlsaMixer *mixer =
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(GstAlsaMixer *) snd_mixer_get_callback_private (handle);
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GST_LOG ("ALSA cb");
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g_return_val_if_fail (mixer != NULL, 1);
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/* Hopefully won't be call recursively and will handle pending elem events */
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snd_mixer_handle_events (mixer->handle);
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gst_alsa_mixer_update (mixer, elem);
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return 0;
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}
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static void
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gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
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{
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gint i, count;
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snd_mixer_elem_t *element, *master;
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GList *item;
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g_return_if_fail (mixer->handle != NULL);
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if (mixer->tracklist)
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return;
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g_static_rec_mutex_lock (mixer->rec_mutex);
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master = gst_alsa_mixer_find_master_mixer (mixer, mixer->handle);
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count = snd_mixer_get_count (mixer->handle);
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element = snd_mixer_first_elem (mixer->handle);
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/* build track list
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*
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* Some ALSA tracks may have playback and capture capabilities.
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* Here we model them as two separate GStreamer tracks.
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*/
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for (i = 0; i < count; i++) {
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GstMixerTrack *play_track = NULL;
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GstMixerTrack *cap_track = NULL;
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const gchar *name;
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GList *item;
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gint samename = 0;
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name = snd_mixer_selem_get_name (element);
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/* prevent dup names */
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for (item = mixer->tracklist; item != NULL; item = item->next) {
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snd_mixer_elem_t *temp;
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if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
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temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
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else
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temp = GST_ALSA_MIXER_TRACK (item->data)->element;
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if (strcmp (name, snd_mixer_selem_get_name (temp)) == 0)
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samename++;
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}
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GST_LOG ("[%s] probing element #%u, mixer->dir=%u", name, i, mixer->dir);
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if (mixer->dir & GST_ALSA_MIXER_PLAYBACK) {
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gboolean has_playback_switch, has_playback_volume;
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has_playback_switch = snd_mixer_selem_has_playback_switch (element);
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has_playback_volume = snd_mixer_selem_has_playback_volume (element);
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GST_LOG ("[%s] PLAYBACK: has_playback_volume=%d, has_playback_switch=%d"
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"%s", name, has_playback_volume, has_playback_switch,
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(element == master) ? " MASTER" : "");
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if (has_playback_volume) {
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gint flags = GST_MIXER_TRACK_OUTPUT;
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if (element == master)
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flags |= GST_MIXER_TRACK_MASTER;
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play_track = gst_alsa_mixer_track_new (element, samename, i,
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flags, FALSE, NULL, FALSE);
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} else if (has_playback_switch) {
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/* simple mute switch */
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play_track = gst_alsa_mixer_track_new (element, samename, i,
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GST_MIXER_TRACK_OUTPUT, TRUE, NULL, FALSE);
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}
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if (snd_mixer_selem_is_enumerated (element)) {
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GstMixerOptions *opts = gst_alsa_mixer_options_new (element, i);
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GST_LOG ("[%s] is enumerated (%d)", name, i);
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mixer->tracklist = g_list_append (mixer->tracklist, opts);
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}
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}
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if (mixer->dir & GST_ALSA_MIXER_CAPTURE) {
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gboolean has_capture_switch, has_common_switch;
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gboolean has_capture_volume, has_common_volume;
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has_capture_switch = snd_mixer_selem_has_capture_switch (element);
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has_common_switch = snd_mixer_selem_has_common_switch (element);
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has_capture_volume = snd_mixer_selem_has_capture_volume (element);
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has_common_volume = snd_mixer_selem_has_common_volume (element);
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GST_LOG ("[%s] CAPTURE: has_capture_volume=%d, has_common_volume=%d, "
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"has_capture_switch=%d, has_common_switch=%d, play_track=%p", name,
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has_capture_volume, has_common_volume, has_capture_switch,
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has_common_switch, play_track);
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if (has_capture_volume && !(play_track && has_common_volume)) {
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cap_track = gst_alsa_mixer_track_new (element, samename, i,
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GST_MIXER_TRACK_INPUT, FALSE, NULL, play_track != NULL);
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} else if (has_capture_switch && !(play_track && has_common_switch)) {
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cap_track = gst_alsa_mixer_track_new (element, samename, i,
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GST_MIXER_TRACK_INPUT, TRUE, NULL, play_track != NULL);
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}
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}
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if (play_track && cap_track) {
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GST_ALSA_MIXER_TRACK (play_track)->shared_mute =
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GST_ALSA_MIXER_TRACK (cap_track);
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GST_ALSA_MIXER_TRACK (cap_track)->shared_mute =
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GST_ALSA_MIXER_TRACK (play_track);
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}
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if (play_track)
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mixer->tracklist = g_list_append (mixer->tracklist, play_track);
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if (cap_track)
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mixer->tracklist = g_list_append (mixer->tracklist, cap_track);
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element = snd_mixer_elem_next (element);
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}
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for (item = mixer->tracklist; item != NULL; item = item->next) {
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snd_mixer_elem_t *temp;
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if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
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temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
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else
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temp = GST_ALSA_MIXER_TRACK (item->data)->element;
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snd_mixer_elem_set_callback (temp, gst_alsa_mixer_elem_handle_callback);
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snd_mixer_elem_set_callback_private (temp, mixer);
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}
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g_static_rec_mutex_unlock (mixer->rec_mutex);
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}
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static void
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task_monitor_alsa (gpointer data)
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{
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struct pollfd *pfds;
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unsigned int nfds, rnfds;
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unsigned short revents;
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GstAlsaMixer *mixer = (GstAlsaMixer *) data;
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g_static_rec_mutex_lock (mixer->rec_mutex);
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nfds = snd_mixer_poll_descriptors_count (mixer->handle);
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if (nfds <= 0) {
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GST_ERROR ("snd_mixer_poll_descriptors_count <= 0: %d", nfds);
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/* FIXME: sleep ? stop monitoring ? */
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return;
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}
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pfds = g_newa (struct pollfd, nfds + 1);
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rnfds = snd_mixer_poll_descriptors (mixer->handle, pfds, nfds);
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g_assert (rnfds <= nfds);
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pfds[rnfds].fd = mixer->pfd[0];
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pfds[rnfds].events = POLLIN | POLLPRI | POLLHUP | POLLERR;
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pfds[rnfds].revents = 0;
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|
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g_static_rec_mutex_unlock (mixer->rec_mutex);
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GST_LOG ("task loop");
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poll (pfds, rnfds + 1, -1);
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g_static_rec_mutex_lock (mixer->rec_mutex);
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snd_mixer_poll_descriptors_revents (mixer->handle, pfds, nfds, &revents);
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if (revents & POLLIN || revents & POLLPRI) {
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GST_DEBUG ("Handling events");
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snd_mixer_handle_events (mixer->handle);
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}
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|
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g_static_rec_mutex_unlock (mixer->rec_mutex);
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}
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|
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/* API */
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|
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GstAlsaMixer *
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gst_alsa_mixer_new (const char *device, GstAlsaMixerDirection dir)
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{
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GstAlsaMixer *ret = NULL;
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g_return_val_if_fail (device != NULL, NULL);
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|
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ret = g_new0 (GstAlsaMixer, 1);
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|
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if (pipe (ret->pfd) == -1)
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goto error;
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ret->rec_mutex = g_new (GStaticRecMutex, 1);
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g_static_rec_mutex_init (ret->rec_mutex);
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|
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ret->task_mutex = g_new (GStaticRecMutex, 1);
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g_static_rec_mutex_init (ret->task_mutex);
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ret->task = gst_task_create (task_monitor_alsa, ret);
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gst_task_set_lock (ret->task, ret->task_mutex);
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ret->device = g_strdup (device);
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ret->dir = dir;
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|
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if (!gst_alsa_mixer_open (ret))
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goto error;
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|
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if (gst_task_start (ret->task) == FALSE) {
|
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GST_WARNING ("Could not start alsamixer task");
|
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}
|
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|
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return ret;
|
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|
|
/* ERRORS */
|
|
error:
|
|
{
|
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gst_alsa_mixer_free (ret);
|
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return NULL;
|
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}
|
|
}
|
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|
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void
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gst_alsa_mixer_free (GstAlsaMixer * mixer)
|
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{
|
|
g_return_if_fail (mixer != NULL);
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|
|
if (mixer->task) {
|
|
if (write (mixer->pfd[1], "stop", 5) <= 0) {
|
|
GST_ERROR ("Cannot send " "stop" " to alsamixer task");
|
|
close (mixer->pfd[1]);
|
|
mixer->pfd[1] = -1;
|
|
}
|
|
|
|
if (gst_task_join (mixer->task) == FALSE) {
|
|
GST_ERROR ("Cannot join alsamixer task");
|
|
}
|
|
|
|
gst_object_unref (mixer->task);
|
|
mixer->task = NULL;
|
|
}
|
|
|
|
g_static_rec_mutex_free (mixer->task_mutex);
|
|
g_free (mixer->task_mutex);
|
|
mixer->task_mutex = NULL;
|
|
|
|
if (mixer->pfd[0] > 0) {
|
|
close (mixer->pfd[0]);
|
|
mixer->pfd[0] = -1;
|
|
}
|
|
|
|
if (mixer->pfd[1] > 0) {
|
|
close (mixer->pfd[1]);
|
|
mixer->pfd[1] = -1;
|
|
}
|
|
|
|
if (mixer->interface) {
|
|
g_object_unref (G_OBJECT (mixer->interface));
|
|
mixer->interface = NULL;
|
|
}
|
|
|
|
if (mixer->device) {
|
|
g_free (mixer->device);
|
|
mixer->device = NULL;
|
|
}
|
|
|
|
if (mixer->cardname) {
|
|
g_free (mixer->cardname);
|
|
mixer->cardname = NULL;
|
|
}
|
|
|
|
if (mixer->tracklist) {
|
|
g_list_foreach (mixer->tracklist, (GFunc) g_object_unref, NULL);
|
|
g_list_free (mixer->tracklist);
|
|
mixer->tracklist = NULL;
|
|
}
|
|
|
|
if (mixer->handle) {
|
|
snd_mixer_close (mixer->handle);
|
|
mixer->handle = NULL;
|
|
}
|
|
|
|
g_static_rec_mutex_free (mixer->rec_mutex);
|
|
g_free (mixer->rec_mutex);
|
|
mixer->rec_mutex = NULL;
|
|
|
|
g_free (mixer);
|
|
}
|
|
|
|
const GList *
|
|
gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer)
|
|
{
|
|
g_return_val_if_fail (mixer->handle != NULL, NULL);
|
|
|
|
gst_alsa_mixer_ensure_track_list (mixer);
|
|
|
|
return (const GList *) mixer->tracklist;
|
|
}
|
|
|
|
void
|
|
gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
|
|
gint * volumes)
|
|
{
|
|
gint i;
|
|
GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
|
|
|
|
g_return_if_fail (mixer->handle != NULL);
|
|
|
|
gst_alsa_mixer_track_update (alsa_track);
|
|
|
|
if (track->flags & GST_MIXER_TRACK_OUTPUT) { /* return playback volume */
|
|
|
|
/* Is emulated mute flag activated? */
|
|
if (track->flags & GST_MIXER_TRACK_MUTE &&
|
|
!(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) {
|
|
for (i = 0; i < track->num_channels; i++)
|
|
volumes[i] = alsa_track->volumes[i];
|
|
} else {
|
|
for (i = 0; i < track->num_channels; i++) {
|
|
long tmp = 0;
|
|
|
|
snd_mixer_selem_get_playback_volume (alsa_track->element, i, &tmp);
|
|
alsa_track->volumes[i] = volumes[i] = (gint) tmp;
|
|
}
|
|
}
|
|
|
|
} else if (track->flags & GST_MIXER_TRACK_INPUT) { /* return capture volume */
|
|
|
|
/* Is emulated record flag activated? */
|
|
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH ||
|
|
track->flags & GST_MIXER_TRACK_RECORD) {
|
|
for (i = 0; i < track->num_channels; i++) {
|
|
long tmp = 0;
|
|
|
|
snd_mixer_selem_get_capture_volume (alsa_track->element, i, &tmp);
|
|
alsa_track->volumes[i] = volumes[i] = (gint) tmp;
|
|
}
|
|
} else {
|
|
for (i = 0; i < track->num_channels; i++)
|
|
volumes[i] = alsa_track->volumes[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_alsa_mixer_set_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
|
|
gint * volumes)
|
|
{
|
|
GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
|
|
gint i;
|
|
|
|
g_return_if_fail (mixer->handle != NULL);
|
|
|
|
gst_alsa_mixer_track_update (alsa_track);
|
|
|
|
if (track->flags & GST_MIXER_TRACK_OUTPUT) {
|
|
|
|
/* Is emulated mute flag activated? */
|
|
if (track->flags & GST_MIXER_TRACK_MUTE &&
|
|
!(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) {
|
|
for (i = 0; i < track->num_channels; i++)
|
|
alsa_track->volumes[i] = volumes[i];
|
|
} else {
|
|
for (i = 0; i < track->num_channels; i++) {
|
|
alsa_track->volumes[i] = volumes[i];
|
|
snd_mixer_selem_set_playback_volume (alsa_track->element, i,
|
|
volumes[i]);
|
|
}
|
|
}
|
|
|
|
} else if (track->flags & GST_MIXER_TRACK_INPUT) {
|
|
|
|
/* Is emulated record flag activated? */
|
|
if (track->flags & GST_MIXER_TRACK_RECORD ||
|
|
alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) {
|
|
for (i = 0; i < track->num_channels; i++) {
|
|
alsa_track->volumes[i] = volumes[i];
|
|
snd_mixer_selem_set_capture_volume (alsa_track->element, i, volumes[i]);
|
|
}
|
|
} else {
|
|
for (i = 0; i < track->num_channels; i++)
|
|
alsa_track->volumes[i] = volumes[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_alsa_mixer_set_mute (GstAlsaMixer * mixer, GstMixerTrack * track,
|
|
gboolean mute)
|
|
{
|
|
GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
|
|
|
|
g_return_if_fail (mixer->handle != NULL);
|
|
|
|
gst_alsa_mixer_track_update (alsa_track);
|
|
|
|
if (!!(mute) == !!(track->flags & GST_MIXER_TRACK_MUTE))
|
|
return;
|
|
|
|
if (mute) {
|
|
track->flags |= GST_MIXER_TRACK_MUTE;
|
|
|
|
if (alsa_track->shared_mute)
|
|
((GstMixerTrack *) (alsa_track->shared_mute))->flags |=
|
|
GST_MIXER_TRACK_MUTE;
|
|
} else {
|
|
track->flags &= ~GST_MIXER_TRACK_MUTE;
|
|
|
|
if (alsa_track->shared_mute)
|
|
((GstMixerTrack *) (alsa_track->shared_mute))->flags &=
|
|
~GST_MIXER_TRACK_MUTE;
|
|
}
|
|
|
|
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH) {
|
|
snd_mixer_selem_set_playback_switch_all (alsa_track->element, mute ? 0 : 1);
|
|
} else {
|
|
gint i;
|
|
GstAlsaMixerTrack *ctrl_track;
|
|
|
|
if ((track->flags & GST_MIXER_TRACK_INPUT)
|
|
&& alsa_track->shared_mute != NULL)
|
|
ctrl_track = alsa_track->shared_mute;
|
|
else
|
|
ctrl_track = alsa_track;
|
|
|
|
for (i = 0; i < ((GstMixerTrack *) ctrl_track)->num_channels; i++) {
|
|
long vol =
|
|
mute ? ((GstMixerTrack *) ctrl_track)->min_volume : ctrl_track->
|
|
volumes[i];
|
|
snd_mixer_selem_set_playback_volume (ctrl_track->element, i, vol);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
|
|
GstMixerTrack * track, gboolean record)
|
|
{
|
|
GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
|
|
|
|
g_return_if_fail (mixer->handle != NULL);
|
|
|
|
gst_alsa_mixer_track_update (alsa_track);
|
|
|
|
if (!!(record) == !!(track->flags & GST_MIXER_TRACK_RECORD))
|
|
return;
|
|
|
|
if (record) {
|
|
track->flags |= GST_MIXER_TRACK_RECORD;
|
|
} else {
|
|
track->flags &= ~GST_MIXER_TRACK_RECORD;
|
|
}
|
|
|
|
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) {
|
|
snd_mixer_selem_set_capture_switch_all (alsa_track->element,
|
|
record ? 1 : 0);
|
|
|
|
/* update all tracks in same exlusive cswitch group */
|
|
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL) {
|
|
GList *item;
|
|
|
|
for (item = mixer->tracklist; item != NULL; item = item->next) {
|
|
|
|
if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
|
|
GstAlsaMixerTrack *item_alsa_track =
|
|
GST_ALSA_MIXER_TRACK (item->data);
|
|
|
|
if (item_alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL &&
|
|
item_alsa_track->capture_group == alsa_track->capture_group) {
|
|
gst_alsa_mixer_track_update (item_alsa_track);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
gint i;
|
|
|
|
for (i = 0; i < track->num_channels; i++) {
|
|
long vol = record ? alsa_track->volumes[i] : track->min_volume;
|
|
|
|
snd_mixer_selem_set_capture_volume (alsa_track->element, i, vol);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_alsa_mixer_set_option (GstAlsaMixer * mixer,
|
|
GstMixerOptions * opts, gchar * value)
|
|
{
|
|
gint idx = -1, n = 0;
|
|
GList *item;
|
|
GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts);
|
|
|
|
g_return_if_fail (mixer->handle != NULL);
|
|
|
|
for (item = opts->values; item != NULL; item = item->next, n++) {
|
|
if (!strcmp (item->data, value)) {
|
|
idx = n;
|
|
break;
|
|
}
|
|
}
|
|
if (idx == -1)
|
|
return;
|
|
|
|
snd_mixer_selem_set_enum_item (alsa_opts->element, 0, idx);
|
|
}
|
|
|
|
const gchar *
|
|
gst_alsa_mixer_get_option (GstAlsaMixer * mixer, GstMixerOptions * opts)
|
|
{
|
|
gint ret;
|
|
guint idx;
|
|
GstAlsaMixerOptions *alsa_opts = GST_ALSA_MIXER_OPTIONS (opts);
|
|
|
|
g_return_val_if_fail (mixer->handle != NULL, NULL);
|
|
|
|
ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
|
|
if (ret == 0)
|
|
return g_list_nth_data (opts->values, idx);
|
|
else
|
|
return snd_strerror (ret); /* feeble attempt at error handling */
|
|
}
|
|
|
|
GstMixerFlags
|
|
gst_alsa_mixer_get_mixer_flags (GstAlsaMixer * mixer)
|
|
{
|
|
g_return_val_if_fail (mixer != NULL, GST_MIXER_FLAG_NONE);
|
|
|
|
return GST_MIXER_FLAG_AUTO_NOTIFICATIONS;
|
|
}
|
|
|
|
static void
|
|
gst_alsa_mixer_update_option (GstAlsaMixer * mixer,
|
|
GstAlsaMixerOptions * alsa_opts)
|
|
{
|
|
gint ret;
|
|
guint idx;
|
|
/* const */ gchar *option;
|
|
|
|
if (mixer->interface == NULL) {
|
|
GST_WARNING ("Cannot send update notifications, no GstMixer * given");
|
|
return;
|
|
}
|
|
|
|
ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
|
|
if (ret == 0) {
|
|
option = g_list_nth_data (GST_MIXER_OPTIONS (alsa_opts)->values, idx);
|
|
gst_mixer_option_changed (mixer->interface, GST_MIXER_OPTIONS (alsa_opts),
|
|
option);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_alsa_mixer_update_track (GstAlsaMixer * mixer,
|
|
GstAlsaMixerTrack * alsa_track)
|
|
{
|
|
GstMixerTrack *track = (GstMixerTrack *) alsa_track;
|
|
gboolean old_mute;
|
|
gboolean old_record;
|
|
gint i, n_channels;
|
|
gint *old_volumes;
|
|
|
|
GST_DEBUG ("Updating track %" GST_PTR_FORMAT, alsa_track);
|
|
|
|
if (mixer->interface == NULL) {
|
|
GST_WARNING ("Cannot send update notifications, no GstMixer * given");
|
|
return;
|
|
}
|
|
|
|
old_mute = !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE));
|
|
old_record = !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD));
|
|
old_volumes = g_new (gint, track->num_channels);
|
|
n_channels = track->num_channels;
|
|
memcpy (old_volumes, alsa_track->volumes,
|
|
sizeof (gint) * track->num_channels);
|
|
|
|
gst_alsa_mixer_track_update (alsa_track);
|
|
|
|
if (old_record !=
|
|
!!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD))) {
|
|
gst_mixer_record_toggled (mixer->interface, track,
|
|
!!GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD));
|
|
}
|
|
if (old_mute != !!(GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE))) {
|
|
gst_mixer_mute_toggled (mixer->interface, track,
|
|
!!GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE));
|
|
}
|
|
|
|
n_channels = MIN (n_channels, track->num_channels);
|
|
for (i = 0; i < n_channels; i++) {
|
|
if (old_volumes[i] != alsa_track->volumes[i]) {
|
|
gst_mixer_volume_changed (mixer->interface, track, alsa_track->volumes);
|
|
break;
|
|
}
|
|
}
|
|
g_free (old_volumes);
|
|
}
|
|
|
|
/* utility function for gstalsamixerelement to set the interface */
|
|
void
|
|
_gst_alsa_mixer_set_interface (GstAlsaMixer * mixer, GstMixer * interface)
|
|
{
|
|
g_return_if_fail (mixer != NULL && mixer->interface == NULL);
|
|
g_return_if_fail (interface != NULL);
|
|
|
|
mixer->interface = g_object_ref (G_OBJECT (interface));
|
|
}
|