gstreamer/ges/ges-audio-source.c
Tim-Philipp Müller a7347ca8f7 WIP: ges: fix API export/import and 'inconsistent linkage' on MSVC
Export GES library API in headers when we're building the
library itself, otherwise import the API from the headers.

This fixes linker warnings on Windows when building with MSVC.

Fix up some missing config.h includes when building the lib which
is needed to get the export api define from config.h

Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/issues/42
2018-12-15 00:14:51 +00:00

204 lines
6.1 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:
*
* <informaltable frame="none">
* <tgroup cols="3">
* <colspec colname="properties_type" colwidth="150px"/>
* <colspec colname="properties_name" colwidth="200px"/>
* <colspec colname="properties_flags" colwidth="400px"/>
* <tbody>
* <row>
* <entry role="property_type"><link linkend="gdouble"><type>double</type></link></entry>
* <entry role="property_name"><link linkend="GESAudioSource--volume">volume</link></entry>
* <entry>volume factor, 1.0=100%.</entry>
* </row>
* <row>
* <entry role="property_type"><link linkend="gboolean"><type>gboolean</type></link></entry>
* <entry role="property_name"><link linkend="GESAudioSource--mute">mute</link></entry>
* <entry>mute channel.</entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
*/
#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;
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);
topbin = ges_source_create_topbin ("audiosrcbin", sub_element, vbin, NULL);
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);
}