gstreamer/ges/ges-video-test-source.c
Thibault Saunier 2cbc1f14df ges: Add a timeoverlay to video test sources
This is often very useful to have a timeoverlay inside test sources.
We do not want to use it as an effect as segments are not the sames
in GES when it comes to nleoperations.
2020-03-25 11:26:29 -03:00

378 lines
11 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, possibly with a time
* overlay.
*/
#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;
gboolean use_overlay;
GstElement *overlay;
GstPad *is_passthrough_pad;
GstPad *os_passthrough_pad;
GstPad *is_overlay_pad;
GstPad *os_overlay_pad;
};
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;
}
enum
{
PROP_0,
PROP_USE_TIME_OVERLAY,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void
get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESVideoTestSource *self = GES_VIDEO_TEST_SOURCE (object);
switch (property_id) {
case PROP_USE_TIME_OVERLAY:
g_value_set_boolean (value, self->priv->use_overlay);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESVideoTestSource *self = GES_VIDEO_TEST_SOURCE (object);
switch (property_id) {
case PROP_USE_TIME_OVERLAY:
{
GstElement *os, *is;
gboolean used_overlay = self->priv->use_overlay;
if (!self->priv->overlay) {
GST_ERROR_OBJECT (object, "Overlaying is disabled, you are probably"
"missing some GStreamer plugin");
return;
}
self->priv->use_overlay = g_value_get_boolean (value);
if (used_overlay == self->priv->use_overlay)
return;
is = GST_ELEMENT (gst_object_get_parent (GST_OBJECT (self->
priv->is_overlay_pad)));
if (!is)
return;
os = GST_ELEMENT (gst_object_get_parent (GST_OBJECT (self->
priv->os_overlay_pad)));
if (!os) {
gst_object_unref (is);
return;
}
g_object_set (is, "active-pad",
self->priv->use_overlay ? self->priv->is_overlay_pad : self->
priv->is_passthrough_pad, NULL);
g_object_set (os, "active-pad",
self->priv->use_overlay ? self->priv->os_overlay_pad : self->
priv->os_passthrough_pad, NULL);
gst_object_unref (is);
gst_object_unref (os);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
_set_child_property (GESTimelineElement * self, GObject * child,
GParamSpec * pspec, GValue * value)
{
GstElementFactory *f =
GST_IS_ELEMENT (child) ? gst_element_get_factory (GST_ELEMENT (child)) :
NULL;
if (!f || g_strcmp0 (GST_OBJECT_NAME (f), "timeoverlay"))
goto done;
GST_INFO_OBJECT (self, "Activating time overlay as time mode is being set");
g_object_set (self, "use-time-overlay", TRUE, NULL);
done:
GES_TIMELINE_ELEMENT_CLASS (ges_video_test_source_parent_class)
->set_child_property (self, child, pspec, value);
}
static void
dispose (GObject * object)
{
GESVideoTestSourcePrivate *priv = GES_VIDEO_TEST_SOURCE (object)->priv;
gst_clear_object (&priv->is_overlay_pad);
gst_clear_object (&priv->is_passthrough_pad);
gst_clear_object (&priv->os_overlay_pad);
gst_clear_object (&priv->os_passthrough_pad);
G_OBJECT_CLASS (ges_video_test_source_parent_class)->dispose (object);
}
static void
ges_video_test_source_class_init (GESVideoTestSourceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (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;
/**
* GESVideoTestSource:use-overlay:
*
* Whether to overlay the test video source with a clock time.
* This property is also registered as a child property for the video
* test source, so you can set it like any other child property.
*
* The properties of the corresponding #timeoverlay are also registered
* as children properties. If you set any child property from the underlying
* `timeoverlay`, this property will be set to %TRUE by default.
*/
properties[PROP_USE_TIME_OVERLAY] =
g_param_spec_boolean ("use-time-overlay", "Use-time-overlay",
"Use time overlay, setting a child property corresponding to GstTimeOverlay will switch this on"
" by default.", FALSE, G_PARAM_READWRITE);
object_class->get_property = get_property;
object_class->set_property = set_property;
object_class->dispose = dispose;
GES_TIMELINE_ELEMENT_CLASS (klass)->set_child_property = _set_child_property;
g_object_class_install_properties (object_class, PROP_LAST, properties);
}
static void
ges_video_test_source_init (GESVideoTestSource * self)
{
self->priv = ges_video_test_source_get_instance_private (self);
self->priv->pattern = DEFAULT_VPATTERN;
}
#define CREATE_ELEMENT(var, ename) \
if (!(var = gst_element_factory_make(ename, NULL))) { \
GST_ERROR_OBJECT(self, "Could not create %s", ename); \
goto done; \
} \
gst_object_ref(var);
static GstElement *
ges_video_test_source_create_overlay (GESVideoTestSource * self)
{
GstElement *bin = NULL, *os = NULL, *is = NULL, *toverlay = NULL, *tcstamper =
NULL;
GstPad *tmppad;
CREATE_ELEMENT (os, "output-selector");
CREATE_ELEMENT (is, "input-selector");
CREATE_ELEMENT (tcstamper, "timecodestamper");
CREATE_ELEMENT (toverlay, "timeoverlay");
bin = gst_bin_new (NULL);
gst_bin_add_many (GST_BIN (bin), os, is, tcstamper, toverlay, NULL);
self->priv->os_passthrough_pad = gst_element_get_request_pad (os, "src_%u");
self->priv->is_passthrough_pad = gst_element_get_request_pad (is, "sink_%u");
gst_pad_link_full (self->priv->os_passthrough_pad,
self->priv->is_passthrough_pad, GST_PAD_LINK_CHECK_NOTHING);
gst_element_link (tcstamper, toverlay);
self->priv->os_overlay_pad = gst_element_get_request_pad (os, "src_%u");
tmppad = gst_element_get_static_pad (tcstamper, "sink");
gst_pad_link_full (self->priv->os_overlay_pad, tmppad,
GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (tmppad);
tmppad = gst_element_get_static_pad (toverlay, "src");
self->priv->is_overlay_pad = gst_element_get_request_pad (is, "sink_%u");
gst_pad_link_full (tmppad, self->priv->is_overlay_pad,
GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (tmppad);
tmppad = gst_element_get_static_pad (os, "sink");
gst_element_add_pad (GST_ELEMENT (bin), gst_ghost_pad_new ("sink", tmppad));
gst_object_unref (tmppad);
tmppad = gst_element_get_static_pad (is, "src");
gst_element_add_pad (GST_ELEMENT (bin), gst_ghost_pad_new ("src", tmppad));
gst_object_unref (tmppad);
done:
gst_clear_object (&os);
gst_clear_object (&is);
gst_clear_object (&tcstamper);
gst_clear_object (&toverlay);
return bin;
}
static GstElement *
ges_video_test_source_create_source (GESTrackElement * element)
{
GstCaps *caps;
gint pattern;
GstElement *testsrc, *capsfilter, *res;
const gchar *props[] = { "pattern", NULL };
GPtrArray *elements;
GESVideoTestSource *self = GES_VIDEO_TEST_SOURCE (element);
testsrc = gst_element_factory_make ("videotestsrc", NULL);
capsfilter = gst_element_factory_make ("capsfilter", NULL);
pattern = 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);
self->priv->overlay = ges_video_test_source_create_overlay (self);
if (self->priv->overlay) {
const gchar *overlay_props[] =
{ "time-mode", "text-y", "text-x", "text-width", "test-height",
"halignment", "valignment", "font-desc", NULL
};
ges_track_element_add_children_props (element, self->priv->overlay, NULL,
NULL, overlay_props);
ges_timeline_element_add_child_property (GES_TIMELINE_ELEMENT (self),
properties[PROP_USE_TIME_OVERLAY], G_OBJECT (self));
g_ptr_array_add (elements, self->priv->overlay);
}
ges_track_element_add_children_props (element, 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);
}