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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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654 lines
18 KiB
C
654 lines
18 KiB
C
/*
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* GStreamer
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* Copyright (C) 2007 David Schleef <ds@schleef.org>
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* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 "gstglfilter.h"
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#define GST_CAT_DEFAULT gst_gl_filter_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static GstStaticPadTemplate gst_gl_filter_src_pad_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
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);
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static GstStaticPadTemplate gst_gl_filter_sink_pad_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
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);
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/* Properties */
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enum
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{
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PROP_0,
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PROP_EXTERNAL_OPENGL_CONTEXT
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};
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_INIT (gst_gl_filter_debug, "glfilter", 0, "glfilter element");
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G_DEFINE_TYPE_WITH_CODE (GstGLFilter, gst_gl_filter, GST_TYPE_BASE_TRANSFORM,
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DEBUG_INIT);
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static void gst_gl_filter_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_filter_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_gl_filter_src_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static GstCaps *gst_gl_filter_transform_caps (GstBaseTransform * bt,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter);
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static void gst_gl_filter_reset (GstGLFilter * filter);
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static gboolean gst_gl_filter_start (GstBaseTransform * bt);
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static gboolean gst_gl_filter_stop (GstBaseTransform * bt);
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static gboolean gst_gl_filter_get_unit_size (GstBaseTransform * trans,
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GstCaps * caps, gsize * size);
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static GstFlowReturn gst_gl_filter_transform (GstBaseTransform * bt,
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GstBuffer * inbuf, GstBuffer * outbuf);
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static gboolean gst_gl_filter_propose_allocation (GstBaseTransform * trans,
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GstQuery * decide_query, GstQuery * query);
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static gboolean gst_gl_filter_decide_allocation (GstBaseTransform * trans,
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GstQuery * query);
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static gboolean gst_gl_filter_set_caps (GstBaseTransform * bt, GstCaps * incaps,
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GstCaps * outcaps);
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/* GstGLDisplayThreadFunc */
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static void gst_gl_filter_start_gl (GstGLDisplay * display, gpointer data);
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static void gst_gl_filter_stop_gl (GstGLDisplay * display, gpointer data);
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static void
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gst_gl_filter_class_init (GstGLFilterClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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gobject_class->set_property = gst_gl_filter_set_property;
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gobject_class->get_property = gst_gl_filter_get_property;
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GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
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gst_gl_filter_transform_caps;
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GST_BASE_TRANSFORM_CLASS (klass)->transform = gst_gl_filter_transform;
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GST_BASE_TRANSFORM_CLASS (klass)->start = gst_gl_filter_start;
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GST_BASE_TRANSFORM_CLASS (klass)->stop = gst_gl_filter_stop;
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GST_BASE_TRANSFORM_CLASS (klass)->set_caps = gst_gl_filter_set_caps;
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GST_BASE_TRANSFORM_CLASS (klass)->propose_allocation =
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gst_gl_filter_propose_allocation;
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GST_BASE_TRANSFORM_CLASS (klass)->decide_allocation =
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gst_gl_filter_decide_allocation;
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GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size = gst_gl_filter_get_unit_size;
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g_object_class_install_property (gobject_class, PROP_EXTERNAL_OPENGL_CONTEXT,
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g_param_spec_ulong ("external-opengl-context",
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"External OpenGL context",
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"Give an external OpenGL context with which to share textures",
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0, G_MAXULONG, 0, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_gl_filter_src_pad_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_gl_filter_sink_pad_template));
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klass->set_caps = NULL;
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klass->filter = NULL;
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klass->display_init_cb = NULL;
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klass->display_reset_cb = NULL;
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klass->onInitFBO = NULL;
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klass->onStart = NULL;
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klass->onStop = NULL;
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klass->onReset = NULL;
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}
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static void
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gst_gl_filter_init (GstGLFilter * filter)
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{
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GstBaseTransform *base_trans = GST_BASE_TRANSFORM (filter);
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gst_pad_set_query_function (base_trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_gl_filter_src_query));
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gst_gl_filter_reset (filter);
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}
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static void
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gst_gl_filter_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstGLFilter *filter = GST_GL_FILTER (object);
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switch (prop_id) {
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case PROP_EXTERNAL_OPENGL_CONTEXT:
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{
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filter->external_gl_context = g_value_get_ulong (value);
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break;
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}
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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_filter_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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//GstGLFilter *filter = GST_GL_FILTER (object);
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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_filter_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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gboolean res = FALSE;
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GstGLFilter *filter = GST_GL_FILTER (parent);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CUSTOM:
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{
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GstStructure *structure = gst_query_writable_structure (query);
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if (filter->display) {
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/* this gl filter is a sink in terms of the gl chain */
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gst_structure_set (structure, "gstgldisplay", G_TYPE_POINTER,
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filter->display, NULL);
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} else {
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gchar *name;
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/* at least one gl element is after in our gl chain */
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name = gst_element_get_name (parent);
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res = g_strcmp0 (name, gst_structure_get_name (structure)) == 0;
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g_free (name);
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}
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if (!res)
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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default:
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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return res;
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}
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static void
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gst_gl_filter_reset (GstGLFilter * filter)
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{
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GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
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if (filter->display) {
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if (filter_class->onReset)
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filter_class->onReset (filter);
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if (filter_class->display_reset_cb != NULL) {
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gst_gl_display_thread_add (filter->display, gst_gl_filter_stop_gl,
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filter);
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}
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//blocking call, delete the FBO
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gst_gl_display_del_fbo (filter->display, filter->fbo, filter->depthbuffer);
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g_object_unref (filter->display);
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filter->display = NULL;
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}
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filter->width = 0;
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filter->height = 0;
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filter->fbo = 0;
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filter->depthbuffer = 0;
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filter->default_shader = NULL;
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filter->external_gl_context = 0;
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}
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static gboolean
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gst_gl_filter_start (GstBaseTransform * bt)
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{
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GstGLFilter *filter = GST_GL_FILTER (bt);
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GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
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GstElement *parent = GST_ELEMENT (gst_element_get_parent (filter));
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GstStructure *structure = NULL;
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GstQuery *query = NULL;
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gboolean isPerformed = FALSE;
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gchar *name;
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if (!parent) {
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GST_ELEMENT_ERROR (filter, CORE, STATE_CHANGE, (NULL),
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("A parent bin is required"));
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return FALSE;
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}
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name = gst_element_get_name (filter);
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structure = gst_structure_new_empty (name);
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query = gst_query_new_custom (GST_QUERY_CUSTOM, structure);
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g_free (name);
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isPerformed = gst_element_query (parent, query);
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if (isPerformed) {
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const GValue *id_value =
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gst_structure_get_value (structure, "gstgldisplay");
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if (G_VALUE_HOLDS_POINTER (id_value))
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/* at least one gl element is after in our gl chain */
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filter->display =
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g_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value)));
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else {
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/* this gl filter is a sink in terms of the gl chain */
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filter->display = gst_gl_display_new ();
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isPerformed = gst_gl_display_create_context (filter->display,
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filter->external_gl_context);
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if (!isPerformed)
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GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND,
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GST_GL_DISPLAY_ERR_MSG (filter->display), (NULL));
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}
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}
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gst_query_unref (query);
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gst_object_unref (GST_OBJECT (parent));
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if (!isPerformed)
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return FALSE;
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if (filter_class->onStart)
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filter_class->onStart (filter);
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return TRUE;
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}
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static gboolean
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gst_gl_filter_stop (GstBaseTransform * bt)
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{
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GstGLFilter *filter = GST_GL_FILTER (bt);
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GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
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if (filter_class->onStop)
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filter_class->onStop (filter);
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gst_gl_filter_reset (filter);
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return TRUE;
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}
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static void
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gst_gl_filter_start_gl (GstGLDisplay * display, gpointer data)
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{
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GstGLFilter *filter = GST_GL_FILTER (data);
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GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
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filter_class->display_init_cb (filter);
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}
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static void
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gst_gl_filter_stop_gl (GstGLDisplay * display, gpointer data)
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{
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GstGLFilter *filter = GST_GL_FILTER (data);
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GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter);
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filter_class->display_reset_cb (filter);
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}
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static GstCaps *
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gst_gl_filter_transform_caps (GstBaseTransform * bt,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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//GstGLFilter* filter = GST_GL_FILTER (bt);
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GstStructure *structure;
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GstCaps *newcaps, *result;
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const GValue *par;
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guint i, n;
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par = NULL;
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newcaps = gst_caps_new_empty ();
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n = gst_caps_get_size (caps);
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// structure = gst_caps_get_structure (newcaps, 0);
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for (i = 0; i < n; i++) {
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structure = gst_caps_get_structure (caps, i);
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if (i > 0 && gst_caps_is_subset_structure (newcaps, structure))
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continue;
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structure = gst_structure_copy (structure);
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// gst_structure_set (structure,
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// "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
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// "height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
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if ((par = gst_structure_get_value (structure, "pixel-aspect-ratio"))) {
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gst_structure_set (structure,
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"pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1,
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NULL);
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}
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gst_caps_append_structure (newcaps, structure);
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}
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if (filter) {
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result =
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gst_caps_intersect_full (filter, newcaps, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (newcaps);
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newcaps = result;
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}
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GST_DEBUG_OBJECT (bt, "returning caps: %" GST_PTR_FORMAT, newcaps);
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return newcaps;
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}
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static gboolean
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gst_gl_filter_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
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gsize * size)
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{
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gboolean ret = FALSE;
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GstVideoInfo info;
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ret = gst_video_info_from_caps (&info, caps);
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if (ret)
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*size = GST_VIDEO_INFO_SIZE (&info);
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return TRUE;
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}
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static gboolean
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gst_gl_filter_set_caps (GstBaseTransform * bt, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstVideoInfo info;
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GstGLFilter *filter;
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gboolean ret;
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GstGLFilterClass *filter_class;
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ret = FALSE;
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filter = GST_GL_FILTER (bt);
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filter_class = GST_GL_FILTER_GET_CLASS (filter);
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if (!filter->display)
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return FALSE;
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ret = gst_video_info_from_caps (&info, outcaps);
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filter->width = GST_VIDEO_INFO_WIDTH (&info);
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filter->height = GST_VIDEO_INFO_HEIGHT (&info);
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if (!ret) {
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GST_DEBUG ("bad caps");
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return FALSE;
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}
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//blocking call, generate a FBO
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ret = gst_gl_display_gen_fbo (filter->display, filter->width, filter->height,
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&filter->fbo, &filter->depthbuffer);
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if (!ret) {
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GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND,
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GST_GL_DISPLAY_ERR_MSG (filter->display), (NULL));
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return FALSE;
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}
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if (filter_class->display_init_cb != NULL) {
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gst_gl_display_thread_add (filter->display, gst_gl_filter_start_gl, filter);
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}
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if (filter_class->onInitFBO)
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ret = filter_class->onInitFBO (filter);
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if (!ret) {
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GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND,
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GST_GL_DISPLAY_ERR_MSG (filter->display), (NULL));
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return FALSE;
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}
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if (filter_class->set_caps)
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ret = filter_class->set_caps (filter, incaps, outcaps);
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if (!ret) {
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GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND,
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GST_GL_DISPLAY_ERR_MSG (filter->display), (NULL));
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return FALSE;
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}
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GST_DEBUG ("set_caps %d %d", filter->width, filter->height);
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return ret;
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}
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static gboolean
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gst_gl_filter_propose_allocation (GstBaseTransform * trans,
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GstQuery * decide_query, GstQuery * query)
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{
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GstGLFilter *filter = GST_GL_FILTER (trans);
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GstBufferPool *pool;
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GstStructure *config;
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GstCaps *caps;
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guint size;
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gboolean need_pool;
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gst_query_parse_allocation (query, &caps, &need_pool);
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if (caps == NULL)
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goto no_caps;
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if ((pool = filter->pool))
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gst_object_ref (pool);
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if (pool != NULL) {
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GstCaps *pcaps;
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/* we had a pool, check caps */
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GST_DEBUG_OBJECT (filter, "check existing pool caps");
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
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if (!gst_caps_is_equal (caps, pcaps)) {
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GST_DEBUG_OBJECT (filter, "pool has different caps");
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/* different caps, we can't use this pool */
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gst_object_unref (pool);
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pool = NULL;
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}
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gst_structure_free (config);
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}
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if (pool == NULL && need_pool) {
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GstVideoInfo info;
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if (!gst_video_info_from_caps (&info, caps))
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goto invalid_caps;
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GST_DEBUG_OBJECT (filter, "create new pool");
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pool = gst_gl_buffer_pool_new (filter->display);
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/* the normal size of a frame */
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size = info.size;
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config = gst_buffer_pool_get_config (pool);
|
|
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
|
|
if (!gst_buffer_pool_set_config (pool, config))
|
|
goto config_failed;
|
|
}
|
|
/* we need at least 2 buffer because we hold on to the last one */
|
|
gst_query_add_allocation_pool (query, pool, size, 1, 0);
|
|
|
|
/* we also support various metadata */
|
|
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
|
|
gst_query_add_allocation_meta (query, GST_GL_META_API_TYPE, 0);
|
|
|
|
gst_object_unref (pool);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_caps:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "no caps specified");
|
|
return FALSE;
|
|
}
|
|
invalid_caps:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "invalid caps specified");
|
|
return FALSE;
|
|
}
|
|
config_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "failed setting config");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_gl_filter_decide_allocation (GstBaseTransform * trans, GstQuery * query)
|
|
{
|
|
GstGLFilter *filter = GST_GL_FILTER (trans);
|
|
GstBufferPool *pool = NULL;
|
|
GstStructure *config;
|
|
GstCaps *caps;
|
|
guint min, max, size;
|
|
gboolean update_pool;
|
|
|
|
gst_query_parse_allocation (query, &caps, NULL);
|
|
|
|
if (gst_query_get_n_allocation_pools (query) > 0) {
|
|
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
|
|
|
|
update_pool = TRUE;
|
|
} else {
|
|
GstVideoInfo vinfo;
|
|
|
|
gst_video_info_init (&vinfo);
|
|
gst_video_info_from_caps (&vinfo, caps);
|
|
size = vinfo.size;
|
|
min = max = 0;
|
|
update_pool = FALSE;
|
|
}
|
|
|
|
if (!pool)
|
|
pool = gst_gl_buffer_pool_new (filter->display);
|
|
|
|
config = gst_buffer_pool_get_config (pool);
|
|
gst_buffer_pool_config_set_params (config, caps, size, min, max);
|
|
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
|
|
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_GL_META);
|
|
gst_buffer_pool_set_config (pool, config);
|
|
|
|
if (update_pool)
|
|
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
|
|
else
|
|
gst_query_add_allocation_pool (query, pool, size, min, max);
|
|
|
|
gst_object_unref (pool);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_gl_filter_transform (GstBaseTransform * bt, GstBuffer * inbuf,
|
|
GstBuffer * outbuf)
|
|
{
|
|
GstGLFilter *filter;
|
|
GstGLFilterClass *filter_class;
|
|
|
|
filter = GST_GL_FILTER (bt);
|
|
filter_class = GST_GL_FILTER_GET_CLASS (bt);
|
|
|
|
if (filter_class->filter)
|
|
filter_class->filter (filter, inbuf, outbuf);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
/* convenience functions to simplify filter development */
|
|
void
|
|
gst_gl_filter_render_to_target (GstGLFilter * filter,
|
|
GLuint input, GLuint target, GLCB func, gpointer data)
|
|
{
|
|
gst_gl_display_use_fbo (filter->display, filter->width, filter->height,
|
|
filter->fbo, filter->depthbuffer, target,
|
|
func,
|
|
filter->width, filter->height, input,
|
|
0, filter->width, 0, filter->height,
|
|
GST_GL_DISPLAY_PROJECTION_ORTHO2D, data);
|
|
}
|
|
|
|
#ifndef OPENGL_ES2
|
|
static void
|
|
_draw_with_shader_cb (gint width, gint height, guint texture, gpointer stuff)
|
|
{
|
|
GstGLFilter *filter = GST_GL_FILTER (stuff);
|
|
|
|
glMatrixMode (GL_PROJECTION);
|
|
glLoadIdentity ();
|
|
|
|
gst_gl_shader_use (filter->default_shader);
|
|
|
|
glActiveTexture (GL_TEXTURE1);
|
|
glEnable (GL_TEXTURE_RECTANGLE_ARB);
|
|
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
|
|
glDisable (GL_TEXTURE_RECTANGLE_ARB);
|
|
|
|
gst_gl_shader_set_uniform_1i (filter->default_shader, "tex", 1);
|
|
|
|
gst_gl_filter_draw_texture (filter, texture);
|
|
}
|
|
|
|
/* attach target to a FBO, use shader, pass input as "tex" uniform to
|
|
* the shader, render input to a quad */
|
|
void
|
|
gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter,
|
|
GLuint input, GLuint target, GstGLShader * shader)
|
|
{
|
|
filter->default_shader = shader;
|
|
gst_gl_filter_render_to_target (filter, input, target, _draw_with_shader_cb,
|
|
filter);
|
|
}
|
|
|
|
void
|
|
gst_gl_filter_draw_texture (GstGLFilter * filter, GLuint texture)
|
|
{
|
|
glActiveTexture (GL_TEXTURE0);
|
|
glEnable (GL_TEXTURE_RECTANGLE_ARB);
|
|
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
|
|
|
|
glBegin (GL_QUADS);
|
|
|
|
glTexCoord2f (0.0, 0.0);
|
|
glVertex2f (-1.0, -1.0);
|
|
glTexCoord2f ((gfloat) filter->width, 0.0);
|
|
glVertex2f (1.0, -1.0);
|
|
glTexCoord2f ((gfloat) filter->width, (gfloat) filter->height);
|
|
glVertex2f (1.0, 1.0);
|
|
glTexCoord2f (0.0, (gfloat) filter->height);
|
|
glVertex2f (-1.0, 1.0);
|
|
|
|
glEnd ();
|
|
}
|
|
#endif
|