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/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.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:element-glcolorscale
*
* video frame scaling and colorspace conversion.
*
* <refsect2>
* <title>Scaling and Color space conversion</title>
* <para>
* Equivalent to glupload ! gldownload.
* </para>
* </refsect2>
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch -v videotestsrc ! "video/x-raw-yuv" ! glcolorscale ! ximagesink
* ]| A pipeline to test colorspace conversion.
* FBO is required.
|[
* gst-launch -v videotestsrc ! "video/x-raw-yuv, width=640, height=480, format=(fourcc)AYUV" ! glcolorscale ! \
* "video/x-raw-yuv, width=320, height=240, format=(fourcc)YV12" ! autovideosink
* ]| A pipeline to test hardware scaling and colorspace conversion.
* FBO and GLSL are required.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglcolorscale.h"
#define GST_CAT_DEFAULT gst_gl_colorscale_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
/* Properties */
enum
{
PROP_0
};
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_colorscale_debug, "glcolorscale", 0, "glcolorscale element");
G_DEFINE_TYPE_WITH_CODE (GstGLColorscale, gst_gl_colorscale,
GST_TYPE_GL_FILTER, DEBUG_INIT);
static void gst_gl_colorscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_colorscale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_gl_colorscale_filter_texture (GstGLFilter * filter,
guint in_tex, guint out_tex);
static void gst_gl_colorscale_callback (gint width, gint height,
guint texture, gpointer stuff);
static void
gst_gl_colorscale_class_init (GstGLColorscaleClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstGLFilterClass *filter_class;
gobject_class = (GObjectClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
filter_class = GST_GL_FILTER_CLASS (klass);
gobject_class->set_property = gst_gl_colorscale_set_property;
gobject_class->get_property = gst_gl_colorscale_get_property;
gst_element_class_set_metadata (element_class, "OpenGL color scale",
"Filter/Effect/Video", "Colorspace converter and video scaler",
"Julien Isorce <julien.isorce@gmail.com>");
filter_class->filter_texture = gst_gl_colorscale_filter_texture;
}
static void
gst_gl_colorscale_init (GstGLColorscale * colorscale)
{
}
static void
gst_gl_colorscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_colorscale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gl_colorscale_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLColorscale *colorscale;
colorscale = GST_GL_COLORSCALE (filter);
gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
gst_gl_colorscale_callback, colorscale);
return TRUE;
}
static void
gst_gl_colorscale_callback (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLFilter *filter = GST_GL_FILTER (stuff);
#if GST_GL_HAVE_OPENGL
if (gst_gl_context_get_gl_api (filter->context) & GST_GL_API_OPENGL) {
const GstGLFuncs *gl = filter->context->gl_vtable;
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_filter_draw_texture (filter, texture, width, height);
}
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