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Diffstat (limited to 'src/stereo_picture_frame.cc')
| -rw-r--r-- | src/stereo_picture_frame.cc | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/stereo_picture_frame.cc b/src/stereo_picture_frame.cc new file mode 100644 index 00000000..279fe7a0 --- /dev/null +++ b/src/stereo_picture_frame.cc @@ -0,0 +1,111 @@ +/* + 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 (string mxf_path, int n) +{ + ASDCP::JP2K::MXFSReader reader; + if (ASDCP_FAILURE (reader.OpenRead (mxf_path.c_str()))) { + boost::throw_exception (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))) { + 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 (); +} |