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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gesaudiosource
* @title: GESAudioSource
* @short_description: Base Class for audio sources
*
* ## Children Properties
*
* You can use the following children properties through the
* #ges_track_element_set_child_property and alike set of methods:
*
* - #gdouble `volume`: volume factor, 1.0=100%.
* - #gboolean `mute`: mute channel.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges/ges-meta-container.h"
#include "ges-track-element.h"
#include "ges-audio-source.h"
#include "ges-layer.h"
struct _GESAudioSourcePrivate
{
GstElement *capsfilter;
GESTrack *current_track;
};
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GESAudioSource, ges_audio_source,
GES_TYPE_SOURCE);
static void
_sync_element_to_layer_property_float (GESTrackElement * trksrc,
GstElement * element, const gchar * meta, const gchar * propname)
{
GESTimelineElement *parent;
GESLayer *layer;
gfloat value;
parent = ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (trksrc));
if (!parent) {
GST_DEBUG_OBJECT (trksrc, "Not in a clip... doing nothing");
return;
}
layer = ges_clip_get_layer (GES_CLIP (parent));
gst_object_unref (parent);
if (layer != NULL) {
ges_meta_container_get_float (GES_META_CONTAINER (layer), meta, &value);
g_object_set (element, propname, value, NULL);
GST_DEBUG_OBJECT (trksrc, "Setting %s to %f", propname, value);
gst_object_unref (layer);
} else {
GST_DEBUG_OBJECT (trksrc, "NOT setting the %s", propname);
}
}
static void
restriction_caps_cb (GESTrack * track,
GParamSpec * arg G_GNUC_UNUSED, GESAudioSource * self)
{
GstCaps *caps;
g_object_get (track, "restriction-caps", &caps, NULL);
GST_DEBUG_OBJECT (self, "Setting capsfilter caps to %" GST_PTR_FORMAT, caps);
g_object_set (self->priv->capsfilter, "caps", caps, NULL);
if (caps)
gst_caps_unref (caps);
}
static void
_track_changed_cb (GESAudioSource * self, GParamSpec * arg G_GNUC_UNUSED,
gpointer udata)
{
GESTrack *track = ges_track_element_get_track (GES_TRACK_ELEMENT (self));
if (self->priv->current_track) {
g_signal_handlers_disconnect_by_func (self->priv->current_track,
(GCallback) restriction_caps_cb, self);
}
self->priv->current_track = track;
if (track) {
restriction_caps_cb (track, NULL, self);
g_signal_connect (track, "notify::restriction-caps",
G_CALLBACK (restriction_caps_cb), self);
}
}
static GstElement *
ges_audio_source_create_element (GESTrackElement * trksrc)
{
GstElement *volume, *vbin;
GstElement *topbin;
GstElement *sub_element;
GPtrArray *elements;
GESSourceClass *source_class = GES_SOURCE_GET_CLASS (trksrc);
const gchar *props[] = { "volume", "mute", NULL };
GESAudioSource *self = GES_AUDIO_SOURCE (trksrc);
g_assert (source_class->create_source);
sub_element = source_class->create_source (GES_SOURCE (trksrc));
GST_DEBUG_OBJECT (trksrc, "Creating a bin sub_element ! volume");
vbin =
gst_parse_bin_from_description
("audioconvert ! audioresample ! volume name=v ! capsfilter name=audio-track-caps-filter",
TRUE, NULL);
elements = g_ptr_array_new ();
g_ptr_array_add (elements, vbin);
topbin = ges_source_create_topbin (GES_SOURCE (trksrc), "audiosrcbin",
sub_element, elements);
volume = gst_bin_get_by_name (GST_BIN (vbin), "v");
self->priv->capsfilter = gst_bin_get_by_name (GST_BIN (vbin),
"audio-track-caps-filter");
g_signal_connect (self, "notify::track", (GCallback) _track_changed_cb, NULL);
_track_changed_cb (self, NULL, NULL);
_sync_element_to_layer_property_float (trksrc, volume, GES_META_VOLUME,
"volume");
ges_track_element_add_children_props (trksrc, volume, NULL, NULL, props);
gst_object_unref (volume);
return topbin;
}
static void
ges_audio_source_dispose (GObject * object)
{
GESAudioSource *self = GES_AUDIO_SOURCE (object);
if (self->priv->capsfilter) {
gst_object_unref (self->priv->capsfilter);
self->priv->capsfilter = NULL;
}
G_OBJECT_CLASS (ges_audio_source_parent_class)->dispose (object);
}
static void
ges_audio_source_class_init (GESAudioSourceClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
gobject_class->dispose = ges_audio_source_dispose;
track_class->nleobject_factorytype = "nlesource";
track_class->create_element = ges_audio_source_create_element;
track_class->ABI.abi.default_track_type = GES_TRACK_TYPE_AUDIO;
}
static void
ges_audio_source_init (GESAudioSource * self)
{
self->priv = ges_audio_source_get_instance_private (self);
}
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