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/*
Copyright (C) 2012-2013 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 <stdint.h>
#include <string>
#include <fstream>
#include <boost/shared_ptr.hpp>
#include <boost/utility.hpp>
#include "metadata.h"
#include "types.h"
namespace libdcp {
class PictureAsset;
struct FrameInfo
{
FrameInfo (uint64_t o, uint64_t s, std::string h)
: offset (o)
, size (s)
, hash (h)
{}
FrameInfo (std::istream& s);
void write (std::ostream& s);
uint64_t offset;
uint64_t size;
std::string hash;
};
class PictureAssetWriter : public boost::noncopyable
{
public:
virtual ~PictureAssetWriter () {}
virtual FrameInfo write (uint8_t *, int) = 0;
virtual void finalize () = 0;
virtual void fake_write (int) = 0;
protected:
template <class P, class Q>
friend void start (PictureAssetWriter *, boost::shared_ptr<P>, Q *, uint8_t *, int);
PictureAssetWriter (PictureAsset *, bool, bool, MXFMetadata const &);
PictureAsset* _asset;
/** Number of picture frames written to the asset so far. For stereo assets
* this will be incremented for each eye (i.e. there will be twice the number
* of frames as in a mono asset).
*/
int _frames_written;
bool _started;
/** true if finalize() has been called */
bool _finalized;
bool _overwrite;
bool _interop;
MXFMetadata _metadata;
};
/** A helper class for writing to MonoPictureAssets progressively (i.e. writing frame-by-frame,
* rather than giving libdcp all the frames in one go).
*
* Objects of this class can only be created with MonoPictureAsset::start_write().
*
* Frames can be written to the MonoPictureAsset by calling write() with a JPEG2000 image
* (a verbatim .j2c file). finalize() must be called after the last frame has been written.
* The action of finalize() can't be done in MonoPictureAssetWriter's destructor as it may
* throw an exception.
*/
class MonoPictureAssetWriter : public PictureAssetWriter
{
public:
FrameInfo write (uint8_t *, int);
void fake_write (int size);
void finalize ();
private:
friend class MonoPictureAsset;
MonoPictureAssetWriter (PictureAsset *, bool, bool, MXFMetadata const &);
void start (uint8_t *, int);
/* do this with an opaque pointer so we don't have to include
ASDCP headers
*/
struct ASDCPState;
boost::shared_ptr<ASDCPState> _state;
};
/** A helper class for writing to StereoPictureAssets progressively (i.e. writing frame-by-frame,
* rather than giving libdcp all the frames in one go).
*
* Objects of this class can only be created with StereoPictureAsset::start_write().
*
* Frames can be written to the MonoPictureAsset by calling write() with a JPEG2000 image
* (a verbatim .j2c file). finalize() must be called after the last frame has been written.
* The action of finalize() can't be done in MonoPictureAssetWriter's destructor as it may
* throw an exception.
*/
class StereoPictureAssetWriter : public PictureAssetWriter
{
public:
FrameInfo write (uint8_t *, int);
void fake_write (int size);
void finalize ();
private:
friend class StereoPictureAsset;
StereoPictureAssetWriter (PictureAsset *, bool, bool, MXFMetadata const &);
void start (uint8_t *, int);
/* do this with an opaque pointer so we don't have to include
ASDCP headers
*/
struct ASDCPState;
boost::shared_ptr<ASDCPState> _state;
libdcp::Eye _next_eye;
};
}
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