gstreamer/subprojects/gst-editing-services/ges/ges-image-source.c

207 lines
5.8 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:gesimagesource
* @title: GESImageSource
* @short_description: outputs the video stream from a media file as a still
* image.
*
* Outputs the video stream from a given file as a still frame. The frame chosen
* will be determined by the in-point property on the track element. For image
* files, do not set the in-point property.
*
* Deprecated: 1.18: This won't be used anymore and has been replaced by
* #GESUriSource instead which now plugs an `imagefreeze` element when
* #ges_uri_source_asset_is_image returns %TRUE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-track-element.h"
#include "ges-image-source.h"
struct _GESImageSourcePrivate
{
/* Dummy variable */
void *nothing;
};
enum
{
PROP_0,
PROP_URI
};
G_DEFINE_TYPE_WITH_PRIVATE (GESImageSource, ges_image_source,
GES_TYPE_VIDEO_SOURCE);
static void
ges_image_source_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESImageSource *uriclip = GES_IMAGE_SOURCE (object);
switch (property_id) {
case PROP_URI:
g_value_set_string (value, uriclip->uri);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_image_source_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESImageSource *uriclip = GES_IMAGE_SOURCE (object);
switch (property_id) {
case PROP_URI:
uriclip->uri = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_image_source_dispose (GObject * object)
{
GESImageSource *uriclip = GES_IMAGE_SOURCE (object);
if (uriclip->uri)
g_free (uriclip->uri);
G_OBJECT_CLASS (ges_image_source_parent_class)->dispose (object);
}
static void
pad_added_cb (GstElement * source, GstPad * pad, GstElement * scale)
{
GstPad *sinkpad;
GstPadLinkReturn ret;
sinkpad = gst_element_get_static_pad (scale, "sink");
if (sinkpad) {
GST_DEBUG ("got sink pad, trying to link");
ret = gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
if (GST_PAD_LINK_SUCCESSFUL (ret)) {
GST_DEBUG ("linked ok, returning");
return;
}
}
GST_DEBUG ("pad failed to link properly");
}
static GstElement *
ges_image_source_create_source (GESSource * source)
{
GstElement *bin, *src, *scale, *freeze, *iconv;
GstPad *srcpad, *target;
bin = GST_ELEMENT (gst_bin_new ("still-image-bin"));
src = gst_element_factory_make ("uridecodebin", NULL);
scale = gst_element_factory_make ("videoscale", NULL);
freeze = gst_element_factory_make ("imagefreeze", NULL);
iconv = gst_element_factory_make ("videoconvert", NULL);
g_object_set (scale, "add-borders", TRUE, NULL);
gst_bin_add_many (GST_BIN (bin), src, scale, freeze, iconv, NULL);
gst_element_link_pads_full (scale, "src", iconv, "sink",
GST_PAD_LINK_CHECK_NOTHING);
gst_element_link_pads_full (iconv, "src", freeze, "sink",
GST_PAD_LINK_CHECK_NOTHING);
/* FIXME: add capsfilter here with sink caps (see 626518) */
target = gst_element_get_static_pad (freeze, "src");
srcpad = gst_ghost_pad_new ("src", target);
gst_element_add_pad (bin, srcpad);
gst_object_unref (target);
g_object_set (src, "uri", ((GESImageSource *) source)->uri, NULL);
g_signal_connect (G_OBJECT (src), "pad-added",
G_CALLBACK (pad_added_cb), scale);
return bin;
}
static void
ges_image_source_class_init (GESImageSourceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESSourceClass *source_class = GES_SOURCE_CLASS (klass);
GESVideoSourceClass *vsource_class = GES_VIDEO_SOURCE_CLASS (klass);
object_class->get_property = ges_image_source_get_property;
object_class->set_property = ges_image_source_set_property;
object_class->dispose = ges_image_source_dispose;
/**
* GESImageSource:uri:
*
* The location of the file/resource to use.
*/
g_object_class_install_property (object_class, PROP_URI,
g_param_spec_string ("uri", "URI", "uri of the resource",
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
source_class->create_source = ges_image_source_create_source;
vsource_class->ABI.abi.get_natural_size =
ges_video_uri_source_get_natural_size;
GES_TRACK_ELEMENT_CLASS_DEFAULT_HAS_INTERNAL_SOURCE (klass) = FALSE;
}
static void
ges_image_source_init (GESImageSource * self)
{
self->priv = ges_image_source_get_instance_private (self);
}
/* @uri: the URI the source should control
*
* Creates a new #GESImageSource for the provided @uri.
*
* Returns: (transfer floating): A new #GESImageSource.
*/
GESImageSource *
ges_image_source_new (gchar * uri)
{
GESImageSource *res;
GESAsset *asset = ges_asset_request (GES_TYPE_IMAGE_SOURCE, uri, NULL);
res = GES_IMAGE_SOURCE (ges_asset_extract (asset, NULL));
res->uri = g_strdup (uri);
gst_object_unref (asset);
return res;
}