mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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233 lines
6.6 KiB
C
233 lines
6.6 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-glcolorscale
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*
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* video frame scaling and colorspace conversion.
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*
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* <refsect2>
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* <title>Scaling and Color space conversion</title>
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* <para>
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* Equivalent to glupload ! gldownload.
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch-1.0 -v videotestsrc ! video/x-raw ! glcolorscale ! ximagesink
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* ]| A pipeline to test colorspace conversion.
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* FBO is required.
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|[
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* gst-launch-1.0 -v videotestsrc ! video/x-raw, width=640, height=480, format=AYUV ! glcolorscale ! \
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* video/x-raw, width=320, height=240, format=YV12 ! videoconvert ! autovideosink
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* ]| A pipeline to test hardware scaling and colorspace conversion.
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* FBO and GLSL are required.
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstglcolorscale.h"
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#define GST_CAT_DEFAULT gst_gl_colorscale_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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/* Properties */
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enum
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{
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PROP_0
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};
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_colorscale_debug, "glcolorscale", 0, "glcolorscale element");
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G_DEFINE_TYPE_WITH_CODE (GstGLColorscale, gst_gl_colorscale,
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GST_TYPE_GL_FILTER, DEBUG_INIT);
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static void gst_gl_colorscale_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_colorscale_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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#if GST_GL_HAVE_GLES2
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static gboolean gst_gl_colorscale_gen_gl_resources (GstGLFilter * filter);
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static void gst_gl_colorscale_del_gl_resources (GstGLFilter * filter);
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#endif
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static gboolean gst_gl_colorscale_filter_texture (GstGLFilter * filter,
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guint in_tex, guint out_tex);
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#if GST_GL_HAVE_OPENGL
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static void gst_gl_colorscale_callback (gint width, gint height,
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guint texture, gpointer stuff);
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#endif
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static void
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gst_gl_colorscale_class_init (GstGLColorscaleClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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GstGLFilterClass *filter_class;
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GstBaseTransformClass *basetransform_class = GST_BASE_TRANSFORM_CLASS (klass);
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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filter_class = GST_GL_FILTER_CLASS (klass);
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gobject_class->set_property = gst_gl_colorscale_set_property;
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gobject_class->get_property = gst_gl_colorscale_get_property;
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gst_element_class_set_metadata (element_class, "OpenGL color scale",
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"Filter/Effect/Video", "Colorspace converter and video scaler",
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"Julien Isorce <julien.isorce@gmail.com>");
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#if GST_GL_HAVE_GLES2
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filter_class->onInitFBO =
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GST_DEBUG_FUNCPTR (gst_gl_colorscale_gen_gl_resources);
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filter_class->onStop = GST_DEBUG_FUNCPTR (gst_gl_colorscale_del_gl_resources);
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#endif
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filter_class->filter_texture = gst_gl_colorscale_filter_texture;
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basetransform_class->passthrough_on_same_caps = TRUE;
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}
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static void
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gst_gl_colorscale_init (GstGLColorscale * colorscale)
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{
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#if GST_GL_HAVE_GLES2
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colorscale->shader = NULL;
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#endif
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}
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static void
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gst_gl_colorscale_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gl_colorscale_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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#if GST_GL_HAVE_GLES2
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static void
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_compile_identity_shader (GstGLContext * context, GstGLColorscale * colorscale)
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{
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GstGLFilter *filter = GST_GL_FILTER (colorscale);
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colorscale->shader = gst_gl_shader_new (context);
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if (!gst_gl_shader_compile_with_default_vf_and_check (colorscale->shader,
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&filter->draw_attr_position_loc, &filter->draw_attr_texture_loc)) {
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gst_gl_context_clear_shader (context);
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gst_object_unref (colorscale->shader);
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colorscale->shader = NULL;
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}
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}
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static gboolean
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gst_gl_colorscale_gen_gl_resources (GstGLFilter * filter)
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{
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GstGLColorscale *colorscale = GST_GL_COLORSCALE (filter);
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if (gst_gl_context_get_gl_api (filter->context) & GST_GL_API_GLES2) {
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gst_gl_context_thread_add (filter->context,
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(GstGLContextThreadFunc) _compile_identity_shader, colorscale);
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if (!colorscale->shader) {
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gst_gl_context_set_error (filter->context,
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"Failed to initialize identity shader");
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GST_ELEMENT_ERROR (colorscale, RESOURCE, NOT_FOUND, ("%s",
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gst_gl_context_get_error ()), (NULL));
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return FALSE;
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}
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}
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return TRUE;
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}
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static void
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gst_gl_colorscale_del_gl_resources (GstGLFilter * filter)
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{
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GstGLColorscale *colorscale = GST_GL_COLORSCALE (filter);
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if (colorscale->shader) {
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gst_gl_context_del_shader (filter->context, colorscale->shader);
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colorscale->shader = NULL;
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}
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}
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#endif
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static gboolean
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gst_gl_colorscale_filter_texture (GstGLFilter * filter, guint in_tex,
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guint out_tex)
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{
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GstGLColorscale *colorscale;
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colorscale = GST_GL_COLORSCALE (filter);
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#if GST_GL_HAVE_GLES2
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if (gst_gl_context_get_gl_api (filter->context) & GST_GL_API_GLES2)
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gst_gl_filter_render_to_target_with_shader (filter, TRUE, in_tex, out_tex,
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colorscale->shader);
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#endif
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#if GST_GL_HAVE_OPENGL
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if (gst_gl_context_get_gl_api (filter->context) & GST_GL_API_OPENGL)
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gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
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gst_gl_colorscale_callback, colorscale);
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#endif
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return TRUE;
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}
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#if GST_GL_HAVE_OPENGL
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static void
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gst_gl_colorscale_callback (gint width, gint height, guint texture,
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gpointer stuff)
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{
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GstGLFilter *filter = GST_GL_FILTER (stuff);
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if (gst_gl_context_get_gl_api (filter->context) & GST_GL_API_OPENGL) {
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const GstGLFuncs *gl = filter->context->gl_vtable;
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gl->MatrixMode (GL_PROJECTION);
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gl->LoadIdentity ();
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}
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gst_gl_filter_draw_texture (filter, texture, width, height);
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}
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#endif
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