gstreamer/ges/ges-audio-source.c
Thibault Saunier 0be8bc9d98 ges: Avoid adding unnecessary converters for nested timelines
Basically we know that if we are using mixing, compositor will be
able to do video conversion and scaling for us, so avoid adding those
usless elements.

This optimizes a lot caps negotiation for deeply nested timelines.
2020-02-12 17:50:37 -03:00

192 lines
5.5 KiB
C

/* 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;
GESAudioSourceClass *source_class = GES_AUDIO_SOURCE_GET_CLASS (trksrc);
const gchar *props[] = { "volume", "mute", NULL };
GESAudioSource *self = GES_AUDIO_SOURCE (trksrc);
if (!source_class->create_source)
return NULL;
sub_element = source_class->create_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 ("audiosrcbin", sub_element, elements);
g_ptr_array_free (elements, TRUE);
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);
GESAudioSourceClass *audio_source_class = GES_AUDIO_SOURCE_CLASS (klass);
gobject_class->dispose = ges_audio_source_dispose;
track_class->nleobject_factorytype = "nlesource";
track_class->create_element = ges_audio_source_create_element;
audio_source_class->create_source = NULL;
}
static void
ges_audio_source_init (GESAudioSource * self)
{
self->priv = ges_audio_source_get_instance_private (self);
}