mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-09 10:59:39 +00:00
b4654f537f
As per Apple's docs, this may improve performance by avoiding redundant invalidations of existing caches of the buffer contents.
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
|
|
* Copyright (C) 2009 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 "coremediabuffer.h"
|
|
|
|
G_DEFINE_TYPE (GstCoreMediaBuffer, gst_core_media_buffer, GST_TYPE_BUFFER);
|
|
|
|
static void
|
|
gst_core_media_buffer_init (GstCoreMediaBuffer * self)
|
|
{
|
|
GST_BUFFER_FLAG_SET (self, GST_BUFFER_FLAG_READONLY);
|
|
}
|
|
|
|
static void
|
|
gst_core_media_buffer_finalize (GstMiniObject * mini_object)
|
|
{
|
|
GstCoreMediaBuffer *self = GST_CORE_MEDIA_BUFFER_CAST (mini_object);
|
|
|
|
if (self->image_buf != NULL) {
|
|
GstCVApi *cv = self->ctx->cv;
|
|
cv->CVPixelBufferUnlockBaseAddress (self->image_buf,
|
|
kCVPixelBufferLock_ReadOnly);
|
|
}
|
|
self->ctx->cm->FigSampleBufferRelease (self->sample_buf);
|
|
g_object_unref (self->ctx);
|
|
|
|
GST_MINI_OBJECT_CLASS (gst_core_media_buffer_parent_class)->finalize
|
|
(mini_object);
|
|
}
|
|
|
|
GstBuffer *
|
|
gst_core_media_buffer_new (GstCoreMediaCtx * ctx, CMSampleBufferRef sample_buf)
|
|
{
|
|
GstCVApi *cv = ctx->cv;
|
|
GstCMApi *cm = ctx->cm;
|
|
CVImageBufferRef image_buf;
|
|
CVPixelBufferRef pixel_buf;
|
|
CMBlockBufferRef block_buf;
|
|
Byte *data = NULL;
|
|
UInt32 size;
|
|
OSStatus status;
|
|
GstCoreMediaBuffer *buf;
|
|
|
|
image_buf = cm->CMSampleBufferGetImageBuffer (sample_buf);
|
|
pixel_buf = NULL;
|
|
block_buf = cm->CMSampleBufferGetDataBuffer (sample_buf);
|
|
|
|
if (image_buf != NULL &&
|
|
CFGetTypeID (image_buf) == cv->CVPixelBufferGetTypeID ()) {
|
|
pixel_buf = (CVPixelBufferRef) image_buf;
|
|
|
|
if (cv->CVPixelBufferLockBaseAddress (pixel_buf,
|
|
kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
|
|
goto error;
|
|
}
|
|
|
|
if (cv->CVPixelBufferIsPlanar (pixel_buf)) {
|
|
gint plane_count, plane_idx;
|
|
|
|
data = cv->CVPixelBufferGetBaseAddressOfPlane (pixel_buf, 0);
|
|
|
|
size = 0;
|
|
plane_count = cv->CVPixelBufferGetPlaneCount (pixel_buf);
|
|
for (plane_idx = 0; plane_idx != plane_count; plane_idx++) {
|
|
size += cv->CVPixelBufferGetBytesPerRowOfPlane (pixel_buf, plane_idx) *
|
|
cv->CVPixelBufferGetHeightOfPlane (pixel_buf, plane_idx);
|
|
}
|
|
} else {
|
|
data = cv->CVPixelBufferGetBaseAddress (pixel_buf);
|
|
size = cv->CVPixelBufferGetBytesPerRow (pixel_buf) *
|
|
cv->CVPixelBufferGetHeight (pixel_buf);
|
|
}
|
|
} else if (block_buf != NULL) {
|
|
status = cm->CMBlockBufferGetDataPointer (block_buf, 0, 0, 0, &data);
|
|
if (status != noErr)
|
|
goto error;
|
|
size = cm->CMBlockBufferGetDataLength (block_buf);
|
|
} else {
|
|
goto error;
|
|
}
|
|
|
|
buf =
|
|
GST_CORE_MEDIA_BUFFER (gst_mini_object_new (GST_TYPE_CORE_MEDIA_BUFFER));
|
|
buf->ctx = g_object_ref (ctx);
|
|
buf->sample_buf = cm->FigSampleBufferRetain (sample_buf);
|
|
buf->image_buf = image_buf;
|
|
buf->pixel_buf = pixel_buf;
|
|
buf->block_buf = block_buf;
|
|
|
|
GST_BUFFER_DATA (buf) = data;
|
|
GST_BUFFER_SIZE (buf) = size;
|
|
|
|
return GST_BUFFER_CAST (buf);
|
|
|
|
error:
|
|
return NULL;
|
|
}
|
|
|
|
CVPixelBufferRef
|
|
gst_core_media_buffer_get_pixel_buffer (GstCoreMediaBuffer * buf)
|
|
{
|
|
return buf->ctx->cv->CVPixelBufferRetain (buf->pixel_buf);
|
|
}
|
|
|
|
static void
|
|
gst_core_media_buffer_class_init (GstCoreMediaBufferClass * klass)
|
|
{
|
|
GstMiniObjectClass *miniobject_class = GST_MINI_OBJECT_CLASS (klass);
|
|
|
|
miniobject_class->finalize = gst_core_media_buffer_finalize;
|
|
}
|