gstreamer/gst-libs/gst/gl/gstglmeta.c

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/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystreet00@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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
#include "gstglmeta.h"
/* GstVideoMeta map/unmap */
gboolean
gst_gl_meta_map (GstVideoMeta * meta, guint plane, GstMapInfo * info,
gpointer * data, gint * stride, GstMapFlags flags)
{
return FALSE;
}
gboolean
gst_gl_meta_unmap (GstVideoMeta * meta, guint plane, GstMapInfo * info)
{
return FALSE;
}
static void
gst_gl_meta_init (GstGLMeta * gl_meta, gpointer params, GstBuffer * buffer)
{
gl_meta->buffer = buffer;
}
void
gst_gl_meta_free (GstGLMeta * gl_meta, GstBuffer * buffer)
{
if (gl_meta->display) {
g_object_unref (gl_meta->display);
gl_meta->display = NULL;
}
}
static gboolean
gst_gl_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstGLMeta *dmeta, *smeta;
smeta = (GstGLMeta *) meta;
if (GST_META_TRANSFORM_IS_COPY (type)) {
GstMetaTransformCopy *copy = data;
if (!copy->region) {
/* only copy if the complete data is copied as well */
dmeta =
(GstGLMeta *) gst_buffer_add_meta (dest, GST_GL_META_INFO,
smeta->display);
dmeta->buffer = dest;
dmeta->memory =
(GstGLMemory *) gst_memory_copy (GST_MEMORY_CAST (smeta->memory), 0,
-1);
}
}
return TRUE;
}
GType
gst_gl_meta_api_get_type (void)
{
static volatile GType type;
static const gchar *tags[] = { "memory", NULL }; /* don't know what to set here */
if (g_once_init_enter (&type)) {
GType _type = gst_meta_api_type_register ("GstGLMetaAPI", tags);
g_once_init_leave (&type, _type);
}
return type;
}
const GstMetaInfo *
gst_gl_meta_get_info (void)
{
static const GstMetaInfo *gl_meta_info = NULL;
if (gl_meta_info == NULL) {
gl_meta_info =
gst_meta_register (GST_GL_META_API_TYPE, "GstGLMeta",
sizeof (GstGLMeta), (GstMetaInitFunction) gst_gl_meta_init,
(GstMetaFreeFunction) gst_gl_meta_free,
(GstMetaTransformFunction) gst_gl_meta_transform);
}
return gl_meta_info;
}
/**
* gst_buffer_add_gl_meta:
* @buffer: a #GstBuffer
* @display: the #GstGLDisplay to use
*
* Creates and adds a #GstGLMeta to a @buffer.
*
* Returns: (transfer full): a newly created #GstGLMeta
*/
GstGLMeta *
gst_buffer_add_gl_meta (GstBuffer * buffer, GstGLDisplay * display)
{
GstGLMeta *gl_meta;
gl_meta = (GstGLMeta *) gst_buffer_add_meta (buffer, GST_GL_META_INFO, NULL);
gl_meta->display = g_object_ref (display);
g_assert (gst_buffer_n_memory (buffer) == 1);
gl_meta->memory = (GstGLMemory *) gst_buffer_get_memory (buffer, 0);
return gl_meta;
}