mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-19 18:40:31 +00:00
202 lines
5.9 KiB
C
202 lines
5.9 KiB
C
/*
|
|
* 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-glfilterapp
|
|
*
|
|
* The resize and redraw callbacks can be set from a client code.
|
|
*
|
|
* <refsect2>
|
|
* <title>CLient callbacks</title>
|
|
* <para>
|
|
* The graphic scene can be written from a client code through the
|
|
* two glfilterapp properties.
|
|
* </para>
|
|
* </refsect2>
|
|
* <refsect2>
|
|
* <title>Examples</title>
|
|
* see gst-plugins-gl/tests/examples/generic/recordgraphic
|
|
* </refsect2>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gstglfilterapp.h"
|
|
|
|
#define GST_CAT_DEFAULT gst_gl_filter_app_debug
|
|
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
|
|
|
|
enum
|
|
{
|
|
SIGNAL_0,
|
|
CLIENT_DRAW_SIGNAL,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
static guint gst_gl_filter_app_signals[LAST_SIGNAL] = { 0 };
|
|
|
|
#define DEBUG_INIT \
|
|
GST_DEBUG_CATEGORY_INIT (gst_gl_filter_app_debug, "glfilterapp", 0, "glfilterapp element");
|
|
|
|
G_DEFINE_TYPE_WITH_CODE (GstGLFilterApp, gst_gl_filter_app,
|
|
GST_TYPE_GL_FILTER, DEBUG_INIT);
|
|
|
|
static void gst_gl_filter_app_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec);
|
|
static void gst_gl_filter_app_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec);
|
|
|
|
static gboolean gst_gl_filter_app_set_caps (GstGLFilter * filter,
|
|
GstCaps * incaps, GstCaps * outcaps);
|
|
static gboolean gst_gl_filter_app_filter_texture (GstGLFilter * filter,
|
|
guint in_tex, guint out_tex);
|
|
static void gst_gl_filter_app_callback (gint width, gint height, guint texture,
|
|
gpointer stuff);
|
|
|
|
|
|
static void
|
|
gst_gl_filter_app_class_init (GstGLFilterAppClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *element_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class->set_property = gst_gl_filter_app_set_property;
|
|
gobject_class->get_property = gst_gl_filter_app_get_property;
|
|
|
|
GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_filter_app_set_caps;
|
|
GST_GL_FILTER_CLASS (klass)->filter_texture =
|
|
gst_gl_filter_app_filter_texture;
|
|
|
|
/**
|
|
* GstGLFilterApp::client-draw:
|
|
* @object: the #GstGLImageSink
|
|
* @texture: the #guint id of the texture.
|
|
* @width: the #guint width of the texture.
|
|
* @height: the #guint height of the texture.
|
|
*
|
|
* Will be emitted before to draw the texture. The client should
|
|
* redraw the surface/contents with the @texture, @width and @height.
|
|
*
|
|
* Returns: whether the texture was redrawn by the signal. If not, a
|
|
* default redraw will occur.
|
|
*/
|
|
gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL] =
|
|
g_signal_new ("client-draw", G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
|
|
G_TYPE_BOOLEAN, 3, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
|
|
|
|
gst_element_class_set_metadata (element_class,
|
|
"OpenGL application filter", "Filter/Effect",
|
|
"Use client callbacks to define the scene",
|
|
"Julien Isorce <julien.isorce@gmail.com>");
|
|
}
|
|
|
|
static void
|
|
gst_gl_filter_app_init (GstGLFilterApp * filter)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gst_gl_filter_app_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_filter_app_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_filter_app_set_caps (GstGLFilter * filter, GstCaps * incaps,
|
|
GstCaps * outcaps)
|
|
{
|
|
//GstGLFilterApp* app_filter = GST_GL_FILTER_APP(filter);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
_emit_draw_signal (guint tex, gint width, gint height, gpointer data)
|
|
{
|
|
GstGLFilterApp *app_filter = GST_GL_FILTER_APP (data);
|
|
gboolean drawn;
|
|
|
|
g_signal_emit (app_filter, gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL], 0,
|
|
tex, width, height, &drawn);
|
|
|
|
app_filter->default_draw = !drawn;
|
|
}
|
|
|
|
static gboolean
|
|
gst_gl_filter_app_filter_texture (GstGLFilter * filter, guint in_tex,
|
|
guint out_tex)
|
|
{
|
|
GstGLFilterApp *app_filter = GST_GL_FILTER_APP (filter);
|
|
|
|
//blocking call, use a FBO
|
|
gst_gl_context_use_fbo (filter->context,
|
|
GST_VIDEO_INFO_WIDTH (&filter->out_info),
|
|
GST_VIDEO_INFO_HEIGHT (&filter->out_info),
|
|
filter->fbo, filter->depthbuffer, out_tex, (GLCB) _emit_draw_signal,
|
|
GST_VIDEO_INFO_WIDTH (&filter->in_info),
|
|
GST_VIDEO_INFO_HEIGHT (&filter->in_info),
|
|
in_tex, 45,
|
|
(gfloat) GST_VIDEO_INFO_WIDTH (&filter->out_info) /
|
|
(gfloat) GST_VIDEO_INFO_HEIGHT (&filter->out_info),
|
|
0.1, 100, GST_GL_DISPLAY_PROJECTION_PERSPECTIVE, filter);
|
|
|
|
if (app_filter->default_draw) {
|
|
gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
|
|
gst_gl_filter_app_callback, filter);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
//opengl scene, params: input texture (not the output filter->texture)
|
|
static void
|
|
gst_gl_filter_app_callback (gint width, gint height, guint texture,
|
|
gpointer stuff)
|
|
{
|
|
GstGLFilter *filter = GST_GL_FILTER (stuff);
|
|
GstGLFuncs *gl = filter->context->gl_vtable;
|
|
|
|
gl->MatrixMode (GL_PROJECTION);
|
|
gl->LoadIdentity ();
|
|
|
|
gst_gl_filter_draw_texture (filter, texture, width, height);
|
|
}
|