gstreamer/ges/ges-video-test-source.c
Thibault Saunier 7b3ac927dc ges: Add a method to retrieve the 'natural' size of VideoSource
This way the user can easily know how the clip would look like
if no scaling was applied to the clip, this is useful to be able
to properly position the clips with the framepositionner element.
2020-02-26 13:36:30 -03:00

162 lines
4.4 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk>
* 2010 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:gesvideotestsource
* @title: GESVideoTestSource
* @short_description: produce solid colors and patterns
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-track-element.h"
#include "ges-video-test-source.h"
#define DEFAULT_VPATTERN GES_VIDEO_TEST_PATTERN_SMPTE
struct _GESVideoTestSourcePrivate
{
GESVideoTestPattern pattern;
};
G_DEFINE_TYPE_WITH_PRIVATE (GESVideoTestSource, ges_video_test_source,
GES_TYPE_VIDEO_SOURCE);
static GstElement *ges_video_test_source_create_source (GESTrackElement * self);
static gboolean
get_natural_size (GESVideoSource * source, gint * width, gint * height)
{
*width = DEFAULT_WIDTH;
*height = DEFAULT_HEIGHT;
return TRUE;
}
static void
ges_video_test_source_class_init (GESVideoTestSourceClass * klass)
{
GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_CLASS (klass);
source_class->create_source = ges_video_test_source_create_source;
source_class->ABI.abi.get_natural_size = get_natural_size;
}
static void
ges_video_test_source_init (GESVideoTestSource * self)
{
self->priv = ges_video_test_source_get_instance_private (self);
self->priv->pattern = DEFAULT_VPATTERN;
}
static GstElement *
ges_video_test_source_create_source (GESTrackElement * self)
{
GstCaps *caps;
gint pattern;
GstElement *testsrc, *capsfilter, *res;
const gchar *props[] = { "pattern", NULL };
GPtrArray *elements;
testsrc = gst_element_factory_make ("videotestsrc", NULL);
capsfilter = gst_element_factory_make ("capsfilter", NULL);
pattern = ((GESVideoTestSource *) self)->priv->pattern;
g_object_set (testsrc, "pattern", pattern, NULL);
elements = g_ptr_array_new ();
g_ptr_array_add (elements, capsfilter);
caps = gst_caps_new_simple ("video/x-raw",
"width", G_TYPE_INT, DEFAULT_WIDTH,
"height", G_TYPE_INT, DEFAULT_HEIGHT,
"framerate", GST_TYPE_FRACTION, DEFAULT_FRAMERATE_N, DEFAULT_FRAMERATE_D,
NULL);
g_object_set (capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
ges_track_element_add_children_props (self, testsrc, NULL, NULL, props);
res = ges_source_create_topbin ("videotestsrc", testsrc, elements);
g_ptr_array_free (elements, TRUE);
return res;
}
/**
* ges_video_test_source_set_pattern:
* @self: a #GESVideoTestSource
* @pattern: a #GESVideoTestPattern
*
* Sets the source to use the given @pattern.
*/
void
ges_video_test_source_set_pattern (GESVideoTestSource
* self, GESVideoTestPattern pattern)
{
GstElement *element =
ges_track_element_get_element (GES_TRACK_ELEMENT (self));
self->priv->pattern = pattern;
if (element) {
GValue val = { 0 };
g_value_init (&val, GES_VIDEO_TEST_PATTERN_TYPE);
g_value_set_enum (&val, pattern);
ges_track_element_set_child_property (GES_TRACK_ELEMENT (self), "pattern",
&val);
}
}
/**
* ges_video_test_source_get_pattern:
* @source: a #GESVideoTestPattern
*
* Get the video pattern used by the @source.
*
* Returns: The video pattern used by the @source.
*/
GESVideoTestPattern
ges_video_test_source_get_pattern (GESVideoTestSource * source)
{
GValue val = { 0 };
ges_track_element_get_child_property (GES_TRACK_ELEMENT (source), "pattern",
&val);
return g_value_get_enum (&val);
}
/**
* ges_video_test_source_new:
*
* Creates a new #GESVideoTestSource.
*
* Returns: (transfer floating) (nullable): The newly created
* #GESVideoTestSource, or %NULL if there was an error.
*/
GESVideoTestSource *
ges_video_test_source_new (void)
{
return g_object_new (GES_TYPE_VIDEO_TEST_SOURCE, "track-type",
GES_TRACK_TYPE_VIDEO, NULL);
}