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/*
* 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;
}
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