mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 12:11:13 +00:00
b4654f537f
As per Apple's docs, this may improve performance by avoiding redundant invalidations of existing caches of the buffer contents.
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
|
|
* Copyright (C) 2010 Ole André Vadla Ravnås <oravnas@cisco.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.
|
|
*/
|
|
|
|
#include "corevideobuffer.h"
|
|
|
|
G_DEFINE_TYPE (GstCoreVideoBuffer, gst_core_video_buffer, GST_TYPE_BUFFER);
|
|
|
|
static void
|
|
gst_core_video_buffer_init (GstCoreVideoBuffer * self)
|
|
{
|
|
GST_BUFFER_FLAG_SET (self, GST_BUFFER_FLAG_READONLY);
|
|
}
|
|
|
|
static void
|
|
gst_core_video_buffer_finalize (GstMiniObject * mini_object)
|
|
{
|
|
GstCoreVideoBuffer *self = GST_CORE_VIDEO_BUFFER_CAST (mini_object);
|
|
GstCVApi *cv = self->ctx->cv;
|
|
|
|
if (self->pixbuf != NULL) {
|
|
cv->CVPixelBufferUnlockBaseAddress (self->pixbuf,
|
|
kCVPixelBufferLock_ReadOnly);
|
|
}
|
|
|
|
cv->CVBufferRelease (self->cvbuf);
|
|
|
|
g_object_unref (self->ctx);
|
|
|
|
GST_MINI_OBJECT_CLASS (gst_core_video_buffer_parent_class)->finalize
|
|
(mini_object);
|
|
}
|
|
|
|
GstBuffer *
|
|
gst_core_video_buffer_new (GstCoreMediaCtx * ctx, CVBufferRef cvbuf)
|
|
{
|
|
GstCVApi *cv = ctx->cv;
|
|
void *data;
|
|
size_t size;
|
|
CVPixelBufferRef pixbuf = NULL;
|
|
GstCoreVideoBuffer *buf;
|
|
|
|
if (CFGetTypeID (cvbuf) == cv->CVPixelBufferGetTypeID ()) {
|
|
pixbuf = (CVPixelBufferRef) cvbuf;
|
|
|
|
if (cv->CVPixelBufferLockBaseAddress (pixbuf,
|
|
kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
|
|
goto error;
|
|
}
|
|
data = cv->CVPixelBufferGetBaseAddress (pixbuf);
|
|
size = cv->CVPixelBufferGetBytesPerRow (pixbuf) *
|
|
cv->CVPixelBufferGetHeight (pixbuf);
|
|
} else {
|
|
/* TODO: Do we need to handle other buffer types? */
|
|
goto error;
|
|
}
|
|
|
|
buf = GST_CORE_VIDEO_BUFFER_CAST (gst_mini_object_new
|
|
(GST_TYPE_CORE_VIDEO_BUFFER));
|
|
buf->ctx = g_object_ref (ctx);
|
|
buf->cvbuf = cv->CVBufferRetain (cvbuf);
|
|
buf->pixbuf = pixbuf;
|
|
|
|
GST_BUFFER_DATA (buf) = data;
|
|
GST_BUFFER_SIZE (buf) = size;
|
|
|
|
return GST_BUFFER_CAST (buf);
|
|
|
|
error:
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
gst_core_video_buffer_class_init (GstCoreVideoBufferClass * klass)
|
|
{
|
|
GstMiniObjectClass *miniobject_class = GST_MINI_OBJECT_CLASS (klass);
|
|
|
|
miniobject_class->finalize = gst_core_video_buffer_finalize;
|
|
}
|