Marco Pesenti Gritti
17 years ago
parent
396fcb392c
commit
42385b069f
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/*
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* Copyright (C) 2006 Red Hat, Inc
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*
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* Sugar is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Sugar is distributed in the hope that it will be useful, but
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* 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <gst/gst.h>
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#include <gst/audio/mixerutils.h>
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#include <gst/interfaces/mixer.h>
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#include <gst/interfaces/propertyprobe.h>
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#include "sugar-audio-manager.h"
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struct _SugarAudioManagerPrivate
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{
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GstMixer *mixer;
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GstMixerTrack *track;
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guint timer_id;
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};
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G_DEFINE_TYPE(SugarAudioManager, sugar_audio_manager, G_TYPE_OBJECT)
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#define SUGAR_AUDIO_MANAGER_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), SUGAR_TYPE_AUDIO_MANAGER, SugarAudioManagerPrivate))
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/* This is a modified version of code from gnome-control-center */
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static gboolean
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mixer_close_real(SugarAudioManager *manager)
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{
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if (manager->priv->mixer != NULL)
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{
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gst_element_set_state(GST_ELEMENT(manager->priv->mixer), GST_STATE_NULL);
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gst_object_unref(GST_OBJECT(manager->priv->mixer));
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g_object_unref(G_OBJECT(manager->priv->track));
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manager->priv->mixer = NULL;
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manager->priv->track = NULL;
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}
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manager->priv->timer_id = 0;
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return FALSE;
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}
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static gboolean
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set_mixer_helper(GstMixer *mixer, gpointer user_data)
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{
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const GList *tracks;
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tracks = gst_mixer_list_tracks(mixer);
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while (tracks != NULL) {
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GstMixerTrack *track = GST_MIXER_TRACK(tracks->data);
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if (GST_MIXER_TRACK_HAS_FLAG(track, GST_MIXER_TRACK_MASTER)) {
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SugarAudioManager *manager;
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manager = SUGAR_AUDIO_MANAGER(user_data);
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manager->priv->mixer = mixer;
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manager->priv->track = track;
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/* no need to ref the mixer element */
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g_object_ref(manager->priv->track);
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return TRUE;
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}
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tracks = tracks->next;
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}
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return FALSE;
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}
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static gboolean
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mixer_open(SugarAudioManager *manager)
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{
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GList *mixer_list;
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if (manager->priv->timer_id != 0) {
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g_source_remove (manager->priv->timer_id);
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manager->priv->timer_id = 0;
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return TRUE;
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}
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mixer_list = gst_audio_default_registry_mixer_filter
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(set_mixer_helper, TRUE, manager);
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if (mixer_list == NULL)
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return FALSE;
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/* do not unref the mixer as we keep the ref for manager->priv->mixer */
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g_list_free (mixer_list);
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return TRUE;
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}
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static void
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mixer_close(SugarAudioManager *manager)
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{
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manager->priv->timer_id = g_timeout_add (4000, (GSourceFunc)mixer_close_real, manager);
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}
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void
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sugar_audio_manager_set_volume (SugarAudioManager *manager,
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int level)
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{
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gint i, *volumes, volume;
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GstMixerTrack *track;
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if (mixer_open(manager) == FALSE)
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return;
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track = manager->priv->track;
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volume = CLAMP(level, 0, 100);
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/* Rescale the volume from [0, 100] to [track min, track max]. */
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volume = (volume / 100.0) * (track->max_volume - track->min_volume) +
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track->min_volume;
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volumes = g_new(gint, track->num_channels);
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for (i = 0; i < track->num_channels; ++i)
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volumes[i] = (gint)volume;
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gst_mixer_set_volume(manager->priv->mixer, track, volumes);
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g_free (volumes);
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mixer_close(manager);
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}
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static void
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sugar_audio_manager_finalize (GObject *object)
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{
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SugarAudioManager *manager = SUGAR_AUDIO_MANAGER(object);
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mixer_close_real(manager);
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G_OBJECT_CLASS(sugar_audio_manager_parent_class)->finalize(object);
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}
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static void
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sugar_audio_manager_class_init(SugarAudioManagerClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS(klass);
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gst_init (NULL, NULL);
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object_class->finalize = sugar_audio_manager_finalize;
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g_type_class_add_private(klass, sizeof(SugarAudioManagerPrivate));
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}
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static void
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sugar_audio_manager_init(SugarAudioManager *manager)
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{
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manager->priv = SUGAR_AUDIO_MANAGER_GET_PRIVATE(manager);
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}
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@ -1,54 +0,0 @@
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/*
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* Copyright (C) 2006 Red Hat, Inc
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*
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* Sugar is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Sugar is distributed in the hope that it will be useful, but
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* 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __SUGAR_AUDIO_MANAGER_H__
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#define __SUGAR_AUDIO_MANAGER_H__
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#include <glib-object.h>
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G_BEGIN_DECLS
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typedef struct _SugarAudioManager SugarAudioManager;
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typedef struct _SugarAudioManagerClass SugarAudioManagerClass;
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typedef struct _SugarAudioManagerPrivate SugarAudioManagerPrivate;
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#define SUGAR_TYPE_AUDIO_MANAGER (sugar_audio_manager_get_type())
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#define SUGAR_AUDIO_MANAGER(object) (G_TYPE_CHECK_INSTANCE_CAST((object), SUGAR_TYPE_AUDIO_MANAGER, SugarAudioManager))
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#define SUGAR_AUDIO_MANAGER_CLASS(klass) (G_TYPE_CHACK_CLASS_CAST((klass), SUGAR_TYPE_AUDIO_MANAGER, SugarAudioManagerClass))
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#define SUGAR_IS_AUDIO_MANAGER(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), SUGAR_TYPE_AUDIO_MANAGER))
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#define SUGAR_IS_AUDIO_MANAGER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), SUGAR_TYPE_AUDIO_MANAGER))
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#define SUGAR_AUDIO_MANAGER_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS((object), SUGAR_TYPE_AUDIO_MANAGER, SugarAudioManagerClass))
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struct _SugarAudioManager {
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GObject base_instance;
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/*< private >*/
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SugarAudioManagerPrivate *priv;
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};
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struct _SugarAudioManagerClass {
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GObjectClass base_class;
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};
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GType sugar_audio_manager_get_type (void);
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void sugar_audio_manager_set_volume (SugarAudioManager *manager,
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int level);
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G_END_DECLS
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#endif /* __SUGAR_AUDIO_MANAGER_H__ */
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