| /* |
| * 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"); |
| |
| #define gst_gl_filter_app_parent_class parent_class |
| 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, |
| GstGLMemory * in_tex, GstGLMemory * out_tex); |
| |
| static gboolean gst_gl_filter_app_gl_start (GstGLBaseFilter * base_filter); |
| static void gst_gl_filter_app_gl_stop (GstGLBaseFilter * base_filter); |
| |
| 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_BASE_FILTER_CLASS (klass)->gl_start = gst_gl_filter_app_gl_start; |
| GST_GL_BASE_FILTER_CLASS (klass)->gl_stop = gst_gl_filter_app_gl_stop; |
| |
| 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_gl_start (GstGLBaseFilter * base_filter) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (base_filter); |
| GError *error = NULL; |
| |
| if (!(filter->default_shader = |
| gst_gl_shader_new_default (base_filter->context, &error))) { |
| GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND, ("%s", |
| "Failed to create the default shader"), ("%s", error->message)); |
| return FALSE; |
| } |
| |
| return GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base_filter); |
| } |
| |
| static void |
| gst_gl_filter_app_gl_stop (GstGLBaseFilter * base_filter) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (base_filter); |
| |
| if (filter->default_shader) |
| gst_object_unref (filter->default_shader); |
| filter->default_shader = NULL; |
| |
| GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base_filter); |
| } |
| |
| static gboolean |
| gst_gl_filter_app_set_caps (GstGLFilter * filter, GstCaps * incaps, |
| GstCaps * outcaps) |
| { |
| //GstGLFilterApp* app_filter = GST_GL_FILTER_APP(filter); |
| |
| return TRUE; |
| } |
| |
| struct glcb2 |
| { |
| GstGLFilterApp *app; |
| GstGLMemory *in_tex; |
| GstGLMemory *out_tex; |
| }; |
| |
| static gboolean |
| _emit_draw_signal (gpointer data) |
| { |
| struct glcb2 *cb = data; |
| gboolean drawn; |
| |
| g_signal_emit (cb->app, gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL], 0, |
| cb->in_tex->tex_id, gst_gl_memory_get_texture_width (cb->out_tex), |
| gst_gl_memory_get_texture_height (cb->out_tex), &drawn); |
| |
| return !drawn; |
| } |
| |
| static gboolean |
| gst_gl_filter_app_filter_texture (GstGLFilter * filter, GstGLMemory * in_tex, |
| GstGLMemory * out_tex) |
| { |
| GstGLFilterApp *app_filter = GST_GL_FILTER_APP (filter); |
| gboolean default_draw; |
| struct glcb2 cb; |
| |
| cb.app = app_filter; |
| cb.in_tex = in_tex; |
| cb.out_tex = out_tex; |
| |
| default_draw = |
| gst_gl_framebuffer_draw_to_texture (filter->fbo, |
| out_tex, _emit_draw_signal, &cb); |
| |
| if (default_draw) { |
| gst_gl_filter_render_to_target_with_shader (filter, in_tex, out_tex, |
| filter->default_shader); |
| } |
| |
| return TRUE; |
| } |