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139 lines
4.5 KiB
C
139 lines
4.5 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2009 Nokia Corporation
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gesaudiosource
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* @short_description: Base Class for audio sources
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*
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* <refsect1 id="GESVideoSource.children_properties" role="properties">
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* <title role="children_properties.title">Children Properties</title>
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* <para>You can use the following children properties through the
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* #ges_track_element_set_child_property and alike set of methods:</para>
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* <informaltable frame="none">
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* <tgroup cols="3">
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* <colspec colname="properties_type" colwidth="150px"/>
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* <colspec colname="properties_name" colwidth="200px"/>
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* <colspec colname="properties_flags" colwidth="400px"/>
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* <tbody>
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* <row>
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* <entry role="property_type"><link linkend="gdouble"><type>double</type></link></entry>
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* <entry role="property_name"><link linkend="GESAudioSource--volume">volume</link></entry>
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* <entry>volume factor, 1.0=100%.</entry>
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* </row>
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* <row>
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* <entry role="property_type"><link linkend="gboolean"><type>gboolean</type></link></entry>
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* <entry role="property_name"><link linkend="GESAudioSource--mute">mute</link></entry>
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* <entry>mute channel.</entry>
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* </row>
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* </tbody>
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* </tgroup>
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* </informaltable>
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* </refsect1>
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*/
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#include "ges-internal.h"
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#include "ges/ges-meta-container.h"
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#include "ges-track-element.h"
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#include "ges-audio-source.h"
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#include "ges-layer.h"
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G_DEFINE_ABSTRACT_TYPE (GESAudioSource, ges_audio_source, GES_TYPE_SOURCE);
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struct _GESAudioSourcePrivate
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{
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/* Dummy variable */
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void *nothing;
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};
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static void
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_sync_element_to_layer_property_float (GESTrackElement * trksrc,
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GstElement * element, const gchar * meta, const gchar * propname)
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{
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GESTimelineElement *parent;
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GESLayer *layer;
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gfloat value;
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parent = ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (trksrc));
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layer = ges_clip_get_layer (GES_CLIP (parent));
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gst_object_unref (parent);
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if (layer != NULL) {
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ges_meta_container_get_float (GES_META_CONTAINER (layer), meta, &value);
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g_object_set (element, propname, value, NULL);
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GST_DEBUG_OBJECT (trksrc, "Setting %s to %f", propname, value);
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} else {
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GST_DEBUG_OBJECT (trksrc, "NOT setting the %s", propname);
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}
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gst_object_unref (layer);
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}
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static GstElement *
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ges_audio_source_create_element (GESTrackElement * trksrc)
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{
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GstElement *volume, *vbin;
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GstElement *topbin;
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GstElement *sub_element;
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GESAudioSourceClass *source_class = GES_AUDIO_SOURCE_GET_CLASS (trksrc);
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const gchar *props[] = { "volume", "mute", NULL };
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if (!source_class->create_source)
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return NULL;
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sub_element = source_class->create_source (trksrc);
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GST_DEBUG_OBJECT (trksrc, "Creating a bin sub_element ! volume");
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vbin =
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gst_parse_bin_from_description
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("audioconvert ! audioresample ! volume name=v", TRUE, NULL);
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topbin = ges_source_create_topbin ("audiosrcbin", sub_element, vbin, NULL);
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volume = gst_bin_get_by_name (GST_BIN (vbin), "v");
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_sync_element_to_layer_property_float (trksrc, volume, GES_META_VOLUME,
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"volume");
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ges_track_element_add_children_props (trksrc, volume, NULL, NULL, props);
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gst_object_unref (volume);
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return topbin;
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}
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static void
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ges_audio_source_class_init (GESAudioSourceClass * klass)
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{
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GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
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GESAudioSourceClass *audio_source_class = GES_AUDIO_SOURCE_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GESAudioSourcePrivate));
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track_class->nleobject_factorytype = "nlesource";
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track_class->create_element = ges_audio_source_create_element;
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audio_source_class->create_source = NULL;
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}
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static void
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ges_audio_source_init (GESAudioSource * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
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GES_TYPE_AUDIO_SOURCE, GESAudioSourcePrivate);
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}
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