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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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132 lines
3.5 KiB
C
132 lines
3.5 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., 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 "gstglbuffer.h"
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static GObjectClass* gst_gl_buffer_parent_class;
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static void
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gst_gl_buffer_finalize (GstGLBuffer* buffer)
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{
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//wait clear textures end, blocking call
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gst_gl_display_clearTexture (buffer->display, buffer->texture);
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g_object_unref (buffer->display);
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GST_MINI_OBJECT_CLASS (gst_gl_buffer_parent_class)->
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finalize (GST_MINI_OBJECT (buffer));
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}
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static void
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gst_gl_buffer_init (GstGLBuffer* buffer, gpointer g_class)
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{
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buffer->display = NULL;
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buffer->width = 0;
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buffer->height = 0;
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buffer->texture = 0;
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}
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static void
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gst_gl_buffer_class_init (gpointer g_class, gpointer class_data)
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{
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GstMiniObjectClass* mini_object_class = GST_MINI_OBJECT_CLASS (g_class);
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gst_gl_buffer_parent_class = g_type_class_peek_parent (g_class);
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mini_object_class->finalize = (GstMiniObjectFinalizeFunction)
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gst_gl_buffer_finalize;
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}
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GType
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gst_gl_buffer_get_type (void)
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{
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static GType _gst_gl_buffer_type;
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if (G_UNLIKELY (_gst_gl_buffer_type == 0)) {
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static const GTypeInfo info = {
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sizeof (GstBufferClass),
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NULL,
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NULL,
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gst_gl_buffer_class_init,
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NULL,
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NULL,
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sizeof (GstGLBuffer),
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0,
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(GInstanceInitFunc) gst_gl_buffer_init,
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NULL
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};
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_gst_gl_buffer_type = g_type_register_static (GST_TYPE_BUFFER,
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"GstGLBuffer", &info, 0);
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}
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return _gst_gl_buffer_type;
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}
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GstGLBuffer*
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gst_gl_buffer_new (GstGLDisplay* display,
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gint gl_width, gint gl_height)
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{
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GstGLBuffer* gl_buffer = (GstGLBuffer *) gst_mini_object_new (GST_TYPE_GL_BUFFER);
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gl_buffer->display = g_object_ref (display);
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gl_buffer->width = gl_width;
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gl_buffer->height = gl_height;
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//it does not depends on the video format because gl buffer has always one texture.
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//the one attached to the upload FBO
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GST_BUFFER_SIZE (gl_buffer) = gst_gl_buffer_get_size (gl_width, gl_height);
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//blocking call, request a texture and attach it to the upload FBO
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gst_gl_display_prepare_texture (gl_buffer->display, &gl_buffer->texture) ;
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return gl_buffer;
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}
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gint
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gst_gl_buffer_get_size (gint width, gint height)
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{
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//this is not strictly true, but it's used for compatibility with
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//queue and BaseTransform
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return width * height * 4;
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}
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gboolean
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gst_gl_buffer_parse_caps (GstCaps* caps, gint* width, gint* height)
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{
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GstStructure* structure = gst_caps_get_structure (caps, 0);
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gboolean ret = gst_structure_has_name (structure, "video/x-raw-gl");
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if (!ret)
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return ret;
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ret = gst_structure_get_int (structure, "width", width);
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ret &= gst_structure_get_int (structure, "height", height);
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return ret;
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}
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