1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
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 "stereo_picture_frame.h"
#include "exceptions.h"
#include "argb_frame.h"
#include "lut.h"
#include "util.h"
#include "gamma_lut.h"
#include "rgb_xyz.h"
#define DCI_GAMMA 2.6
using std::string;
using boost::shared_ptr;
using namespace libdcp;
/** 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 ()
{
delete _buffer;
}
/** @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 eye Eye to return (EYE_LEFT or EYE_RIGHT).
*
* @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_rgb (xyz_frame, GammaLUT::cache.get (12, DCI_GAMMA), GammaLUT::cache.get (12, 1 / srgb_gamma));
}
uint8_t const *
StereoPictureFrame::left_j2k_data () const
{
return _buffer->Left.RoData ();
}
int
StereoPictureFrame::left_j2k_size () const
{
return _buffer->Left.Size ();
}
uint8_t const *
StereoPictureFrame::right_j2k_data () const
{
return _buffer->Right.RoData ();
}
int
StereoPictureFrame::right_j2k_size () const
{
return _buffer->Right.Size ();
}
|
