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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <openjpeg.h>
#include "AS_DCP.h"
#include "KM_fileio.h"
#include "picture_frame.h"
#include "exceptions.h"
#include "argb_frame.h"
#include "lut.h"
#include "util.h"
using namespace std;
using namespace boost;
using namespace libdcp;
/** Make a picture frame from a 2D (monoscopic) asset.
* @param mxf_path Path to the asset's MXF file.
* @param n Frame within the asset, not taking EntryPoint into account.
*/
MonoPictureFrame::MonoPictureFrame (string mxf_path, int n)
{
ASDCP::JP2K::MXFReader reader;
if (ASDCP_FAILURE (reader.OpenRead (mxf_path.c_str()))) {
throw FileError ("could not open MXF file for reading", mxf_path);
}
/* XXX: unfortunate guesswork on this buffer size */
_buffer = new ASDCP::JP2K::FrameBuffer (4 * Kumu::Megabyte);
if (ASDCP_FAILURE (reader.ReadFrame (n, *_buffer))) {
throw DCPReadError ("could not read video frame");
}
}
MonoPictureFrame::~MonoPictureFrame ()
{
delete _buffer;
}
/** @return An ARGB representation of this frame. This is ARGB in the
* Cairo sense, so that each pixel takes up 4 bytes; the first byte
* is blue, second green, third red and fourth alpha (always 255).
*/
shared_ptr<ARGBFrame>
MonoPictureFrame::argb_frame () const
{
opj_image_t* xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->RoData()), _buffer->Size());
assert (xyz_frame->numcomps == 3);
shared_ptr<ARGBFrame> f = xyz_to_rgb (xyz_frame);
opj_image_destroy (xyz_frame);
return f;
}
/** Make a picture frame from a 3D (stereoscopic) asset.
* @param mxf_path Path to the asset's MXF file.
* @param n Frame within the asset, not taking EntryPoint into account.
*/
StereoPictureFrame::StereoPictureFrame (string mxf_path, int n)
{
ASDCP::JP2K::MXFSReader reader;
if (ASDCP_FAILURE (reader.OpenRead (mxf_path.c_str()))) {
throw FileError ("could not open MXF file for reading", mxf_path);
}
/* XXX: unfortunate guesswork on this buffer size */
_buffer = new ASDCP::JP2K::SFrameBuffer (4 * Kumu::Megabyte);
if (ASDCP_FAILURE (reader.ReadFrame (n, *_buffer))) {
throw DCPReadError ("could not read video frame");
}
}
StereoPictureFrame::~StereoPictureFrame ()
{
delete _buffer;
}
/** @return An ARGB representation of one of the eyes (left or right)
* of this frame. This is ARGB in the Cairo sense, so that each
* pixel takes up 4 bytes; the first byte is blue, second green,
* third red and fourth alpha (always 255).
*
* @param eye Eye to return (EYE_LEFT or EYE_RIGHT).
*/
shared_ptr<ARGBFrame>
StereoPictureFrame::argb_frame (Eye eye) const
{
opj_image_t* xyz_frame = 0;
switch (eye) {
case LEFT:
xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Left.RoData()), _buffer->Left.Size());
break;
case RIGHT:
xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Right.RoData()), _buffer->Right.Size());
break;
}
assert (xyz_frame->numcomps == 3);
shared_ptr<ARGBFrame> f = xyz_to_rgb (xyz_frame);
opj_image_destroy (xyz_frame);
return f;
}
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