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/*
Copyright (C) 2012-2014 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 "stereo_picture_frame.h"
#include "exceptions.h"
#include "argb_frame.h"
#include "util.h"
#include "gamma_lut.h"
#include "rgb_xyz.h"
#include "AS_DCP.h"
#include "KM_fileio.h"
#include <openjpeg.h>
#define DCI_GAMMA 2.6
using std::string;
using boost::shared_ptr;
using namespace dcp;
/** 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 (boost::filesystem::path mxf_path, int n)
{
ASDCP::JP2K::MXFSReader reader;
Kumu::Result_t r = reader.OpenRead (mxf_path.string().c_str());
if (ASDCP_FAILURE (r)) {
boost::throw_exception (FileError ("could not open MXF file for reading", mxf_path, r));
}
/* XXX: unfortunate guesswork on this buffer size */
_buffer = new ASDCP::JP2K::SFrameBuffer (4 * Kumu::Megabyte);
if (ASDCP_FAILURE (reader.ReadFrame (n, *_buffer))) {
boost::throw_exception (DCPReadError ("could not read video frame"));
}
}
StereoPictureFrame::StereoPictureFrame ()
{
_buffer = new ASDCP::JP2K::SFrameBuffer (4 * Kumu::Megabyte);
}
StereoPictureFrame::~StereoPictureFrame ()
{
delete _buffer;
}
/** @param eye Eye to return (EYE_LEFT or EYE_RIGHT).
* @param reduce a factor by which to reduce the resolution
* of the image, expressed as a power of two (pass 0 for no
* reduction).
* @param srgb_gamma Reciprocal of gamma to use when doing the
* output gamma correction (after conversion from XYZ to RGB).
*
* @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).
*
*/
shared_ptr<ARGBFrame>
StereoPictureFrame::argb_frame (Eye eye, int reduce, float srgb_gamma) const
{
shared_ptr<XYZFrame> xyz_frame;
switch (eye) {
case LEFT:
xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Left.RoData()), _buffer->Left.Size(), reduce);
break;
case RIGHT:
xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Right.RoData()), _buffer->Right.Size(), reduce);
break;
}
return xyz_to_rgba (xyz_frame, GammaLUT::cache.get (12, DCI_GAMMA, false), GammaLUT::cache.get (12, 1 / srgb_gamma, false));
}
void
StereoPictureFrame::rgb_frame (Eye eye, uint8_t* buffer) const
{
shared_ptr<XYZFrame> xyz_frame;
switch (eye) {
case LEFT:
xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Left.RoData()), _buffer->Left.Size(), 0);
break;
case RIGHT:
xyz_frame = decompress_j2k (const_cast<uint8_t*> (_buffer->Right.RoData()), _buffer->Right.Size(), 0);
break;
}
return xyz_to_rgb (xyz_frame, GammaLUT::cache.get (12, DCI_GAMMA, false), GammaLUT::cache.get (12, 1 / 2.4, false), buffer);
}
uint8_t const *
StereoPictureFrame::left_j2k_data () const
{
return _buffer->Left.RoData ();
}
uint8_t*
StereoPictureFrame::left_j2k_data ()
{
return _buffer->Left.Data ();
}
int
StereoPictureFrame::left_j2k_size () const
{
return _buffer->Left.Size ();
}
uint8_t const *
StereoPictureFrame::right_j2k_data () const
{
return _buffer->Right.RoData ();
}
uint8_t*
StereoPictureFrame::right_j2k_data ()
{
return _buffer->Right.Data ();
}
int
StereoPictureFrame::right_j2k_size () const
{
return _buffer->Right.Size ();
}
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