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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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b25807c382
A GstGLShader is now simply a collection of stages that are compiled and linked together into a program. The uniform/attribute interface has remained the same.
188 lines
5.7 KiB
C
188 lines
5.7 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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#define gst_gl_colorscale_parent_class parent_class
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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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static gboolean gst_gl_colorscale_gl_start (GstGLBaseFilter * base_filter);
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static void gst_gl_colorscale_gl_stop (GstGLBaseFilter * base_filter);
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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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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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GstBaseTransformClass *basetransform_class;
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GstGLBaseFilterClass *base_filter_class;
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GstGLFilterClass *filter_class;
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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basetransform_class = GST_BASE_TRANSFORM_CLASS (klass);
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base_filter_class = GST_GL_BASE_FILTER_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>\n"
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"Matthew Waters <matthew@centricular.com>");
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basetransform_class->passthrough_on_same_caps = TRUE;
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base_filter_class->gl_start = GST_DEBUG_FUNCPTR (gst_gl_colorscale_gl_start);
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base_filter_class->gl_stop = GST_DEBUG_FUNCPTR (gst_gl_colorscale_gl_stop);
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base_filter_class->supported_gl_api =
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GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2;
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filter_class->filter_texture = gst_gl_colorscale_filter_texture;
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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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}
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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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static gboolean
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gst_gl_colorscale_gl_start (GstGLBaseFilter * base_filter)
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{
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GstGLColorscale *colorscale = GST_GL_COLORSCALE (base_filter);
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GstGLFilter *filter = GST_GL_FILTER (base_filter);
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GstGLShader *shader;
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GError *error = NULL;
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if (!(shader = gst_gl_shader_new_default (base_filter->context, &error))) {
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GST_ERROR_OBJECT (colorscale, "Failed to initialize shader: %s",
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error->message);
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gst_object_unref (shader);
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return FALSE;
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}
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filter->draw_attr_position_loc =
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gst_gl_shader_get_attribute_location (shader, "a_position");
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filter->draw_attr_texture_loc =
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gst_gl_shader_get_attribute_location (shader, "a_texcoord");
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colorscale->shader = shader;
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return GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base_filter);
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}
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static void
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gst_gl_colorscale_gl_stop (GstGLBaseFilter * base_filter)
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{
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GstGLColorscale *colorscale = GST_GL_COLORSCALE (base_filter);
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if (colorscale->shader) {
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gst_object_unref (colorscale->shader);
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colorscale->shader = NULL;
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}
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return GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base_filter);
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}
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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 = GST_GL_COLORSCALE (filter);
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if (gst_gl_context_get_gl_api (GST_GL_BASE_FILTER (filter)->context))
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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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return TRUE;
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}
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