blob: e347e2889117d1648e6dc367c22066feff4f556a [file] [log] [blame]
/*
* 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>");
GST_GL_BASE_FILTER_CLASS (klass)->supported_gl_api =
GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3;
}
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;
}
struct glcb2
{
GLCB func;
gpointer data;
guint texture;
guint width;
guint height;
};
/* convenience functions to simplify filter development */
static void
_glcb2 (gpointer data)
{
struct glcb2 *cb = data;
cb->func (cb->width, cb->height, cb->texture, cb->data);
}
static gboolean
gst_gl_filter_app_filter_texture (GstGLFilter * filter, guint in_tex,
guint out_tex)
{
GstGLFilterApp *app_filter = GST_GL_FILTER_APP (filter);
struct glcb2 cb;
cb.func = (GLCB) _emit_draw_signal;
cb.data = filter;
cb.texture = in_tex;
cb.width = GST_VIDEO_INFO_WIDTH (&filter->in_info);
cb.height = GST_VIDEO_INFO_HEIGHT (&filter->in_info);
//blocking call, use a FBO
gst_gl_context_use_fbo_v2 (GST_GL_BASE_FILTER (filter)->context,
GST_VIDEO_INFO_WIDTH (&filter->out_info),
GST_VIDEO_INFO_HEIGHT (&filter->out_info),
filter->fbo, filter->depthbuffer, out_tex, _glcb2, &cb);
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);
#if GST_GL_HAVE_OPENGL
if (gst_gl_context_get_gl_api (GST_GL_BASE_FILTER (filter)->context) &
GST_GL_API_OPENGL) {
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_filter_draw_texture (filter, texture, width, height);
}