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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"
static void
gst_core_media_meta_free (GstCoreMediaMeta * meta, GstBuffer * buf)
{
if (meta->image_buf != NULL) {
GstCVApi *cv = meta->ctx->cv;
cv->CVPixelBufferUnlockBaseAddress (meta->image_buf,
kCVPixelBufferLock_ReadOnly);
}
meta->ctx->cm->FigSampleBufferRelease (meta->sample_buf);
g_object_unref (meta->ctx);
}
static const GstMetaInfo *
gst_core_media_meta_get_info (void)
{
static const GstMetaInfo *core_media_meta_info = NULL;
if (core_media_meta_info == NULL) {
core_media_meta_info = gst_meta_register ("GstCoreMediaeMeta",
"GstCoreMediaMeta", sizeof (GstCoreMediaMeta),
(GstMetaInitFunction) NULL,
(GstMetaFreeFunction) gst_core_media_meta_free,
(GstMetaTransformFunction) NULL);
}
return core_media_meta_info;
}
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;
GstBuffer *buf;
GstCoreMediaMeta *meta;
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_buffer_new ();
meta = (GstCoreMediaMeta *) gst_buffer_add_meta (buf,
gst_core_media_meta_get_info (), NULL);
meta->ctx = g_object_ref (ctx);
meta->sample_buf = cm->FigSampleBufferRetain (sample_buf);
meta->image_buf = image_buf;
meta->pixel_buf = pixel_buf;
meta->block_buf = block_buf;
gst_buffer_take_memory (buf, -1,
gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data,
size, 0, size, NULL, NULL));
return buf;
error:
return NULL;
}
CVPixelBufferRef
gst_core_media_buffer_get_pixel_buffer (GstBuffer * buf)
{
GstCoreMediaMeta *meta = (GstCoreMediaMeta *) gst_buffer_get_meta (buf,
gst_core_media_meta_get_info ());
g_return_val_if_fail (meta != NULL, NULL);
return meta->ctx->cv->CVPixelBufferRetain (meta->pixel_buf);
}
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