gstreamer/ges/ges-video-test-source.c
Thibault Saunier 5e448921d8 ges: Move TimeOverlayClip out of GESTestClip
This was complexifying the implementation for very little gain.
Each source type should ideally have its own API.

In that patch we make it so we do not have to subclass anything
but instead use GESAsset to pass information about how the pipeline
should look like.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/175>
2020-05-19 13:27:13 +00:00

327 lines
8.8 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk>
* 2010 Nokia Corporation
* Copyright (C) 2020 Igalia S.L
* Author: 2020 Thibault Saunier <tsaunier@igalia.com>
*
* 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;
GstElement *capsfilter;
};
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->check_id = ges_test_source_asset_check_id;
iface->asset_type = GES_TYPE_TRACK_ELEMENT_ASSET;
}
static GstStructure *
ges_video_test_source_asset_get_config (GESAsset * asset)
{
const gchar *id = ges_asset_get_id (asset);
if (g_strcmp0 (id, g_type_name (ges_asset_get_extractable_type (asset))))
return gst_structure_from_string (ges_asset_get_id (asset), NULL);
return NULL;
}
G_DEFINE_TYPE_WITH_CODE (GESVideoTestSource, ges_video_test_source,
GES_TYPE_VIDEO_SOURCE, G_ADD_PRIVATE (GESVideoTestSource)
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
ges_extractable_interface_init));
static GstElement *ges_video_test_source_create_source (GESTrackElement * self);
static gboolean
get_natural_size (GESVideoSource * source, gint * width, gint * height)
{
gboolean res = FALSE;
GESTimelineElement *parent = GES_TIMELINE_ELEMENT_PARENT (source);
if (parent) {
GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (parent));
if (asset)
res = ges_test_clip_asset_get_natural_size (asset, width, height);
}
if (!res) {
*width = DEFAULT_WIDTH;
*height = DEFAULT_HEIGHT;
}
return TRUE;
}
static gboolean
_set_parent (GESTimelineElement * element, GESTimelineElement * parent)
{
GESVideoTestSource *self = GES_VIDEO_TEST_SOURCE (element);
if (parent) {
gint width, height, fps_n, fps_d;
GstCaps *caps;
g_assert (self->priv->capsfilter);
/* Setting the parent ourself as we need it to get the natural size */
element->parent = parent;
if (!ges_video_source_get_natural_size (GES_VIDEO_SOURCE (self), &width,
&height)) {
width = DEFAULT_WIDTH;
height = DEFAULT_HEIGHT;
}
if (!ges_timeline_element_get_natural_framerate (parent, &fps_n, &fps_d)) {
fps_n = DEFAULT_FRAMERATE_N;
fps_d = DEFAULT_FRAMERATE_D;
}
caps = gst_caps_new_simple ("video/x-raw",
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, fps_n, fps_d, NULL);
g_object_set (self->priv->capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
}
return TRUE;
}
static gboolean
_get_natural_framerate (GESTimelineElement * element, gint * fps_n,
gint * fps_d)
{
gboolean res = FALSE;
GESTimelineElement *parent = GES_TIMELINE_ELEMENT_PARENT (element);
if (parent) {
GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (parent));
if (asset) {
res =
ges_clip_asset_get_natural_framerate (GES_CLIP_ASSET (asset), fps_n,
fps_d);
}
}
if (!res) {
*fps_n = DEFAULT_FRAMERATE_N;
*fps_d = DEFAULT_FRAMERATE_D;
}
return TRUE;
}
static void
dispose (GObject * object)
{
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;
object_class->dispose = dispose;
GES_TIMELINE_ELEMENT_CLASS (klass)->set_parent = _set_parent;
GES_TIMELINE_ELEMENT_CLASS (klass)->get_natural_framerate =
_get_natural_framerate;
}
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 GstStructure *
ges_video_test_source_get_config (GESVideoTestSource * self)
{
GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (self));
if (asset)
return ges_video_test_source_asset_get_config (asset);
return NULL;
}
static GstElement *
ges_video_test_source_create_overlay (GESVideoTestSource * self)
{
const gchar *bindesc = NULL;
GstStructure *config = ges_video_test_source_get_config (self);
if (!config)
return NULL;
if (gst_structure_has_name (config, "time-overlay")) {
gboolean disable_timecodestamper;
if (gst_structure_get_boolean (config, "disable-timecodestamper",
&disable_timecodestamper))
bindesc = "timeoverlay";
else
bindesc = "timecodestamper ! timeoverlay";
}
gst_structure_free (config);
if (!bindesc)
return NULL;
return gst_parse_bin_from_description (bindesc, TRUE, NULL);
}
static GstElement *
ges_video_test_source_create_source (GESTrackElement * element)
{
GstCaps *caps;
gint pattern;
GstElement *testsrc, *res;
GstElement *overlay;
const gchar *props[] =
{ "pattern", "background-color", "foreground-color", NULL };
GPtrArray *elements;
GESVideoTestSource *self = GES_VIDEO_TEST_SOURCE (element);
g_assert (!GES_TIMELINE_ELEMENT_PARENT (element));
testsrc = gst_element_factory_make ("videotestsrc", NULL);
self->priv->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, self->priv->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 (self->priv->capsfilter, "caps", caps, NULL);
gst_caps_unref (caps);
overlay = ges_video_test_source_create_overlay (self);
if (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, overlay, NULL,
NULL, overlay_props);
g_ptr_array_add (elements, 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)
{
GESVideoTestSource *res;
GESAsset *asset = ges_asset_request (GES_TYPE_VIDEO_TEST_SOURCE, NULL, NULL);
res = GES_VIDEO_TEST_SOURCE (ges_asset_extract (asset, NULL));
gst_object_unref (asset);
return res;
}