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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.
*/
/** @file src/image.h
* @brief A set of classes to describe video images.
*/
#ifndef DVDOMATIC_IMAGE_H
#define DVDOMATIC_IMAGE_H
#include <string>
#include <boost/shared_ptr.hpp>
#include <boost/function.hpp>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavfilter/avfilter.h>
}
#include "util.h"
class Scaler;
class RGBFrameImage;
class SimpleImage;
/** @class Image
* @brief Parent class for wrappers of some image, in some format, that
* can present a set of components and a size in pixels.
*
* This class also has some conversion / processing methods.
*
* The main point of this class (and its subclasses) is to abstract
* details of FFmpeg's memory management and varying data formats.
*/
class Image
{
public:
Image (AVPixelFormat p)
: _pixel_format (p)
{}
virtual ~Image () {}
/** @return Array of pointers to arrays of the component data */
virtual uint8_t ** data () const = 0;
/** @return Array of sizes of the data in each line, in bytes (without any alignment padding bytes) */
virtual int * line_size () const = 0;
/** @return Array of strides for each line (including any alignment padding bytes) */
virtual int * stride () const = 0;
/** @return Size of the image, in pixels */
virtual Size size () const = 0;
int components () const;
int lines (int) const;
boost::shared_ptr<Image> scale_and_convert_to_rgb (Size, int, Scaler const *) const;
boost::shared_ptr<Image> scale (Size, Scaler const *) const;
boost::shared_ptr<Image> post_process (std::string) const;
void alpha_blend (boost::shared_ptr<Image> image, Position pos);
void make_black ();
void read_from_socket (boost::shared_ptr<Socket>);
void write_to_socket (boost::shared_ptr<Socket>) const;
AVPixelFormat pixel_format () const {
return _pixel_format;
}
private:
AVPixelFormat _pixel_format; ///< FFmpeg's way of describing the pixel format of this Image
};
/** @class FilterBufferImage
* @brief An Image that is held in an AVFilterBufferRef.
*/
class FilterBufferImage : public Image
{
public:
FilterBufferImage (AVPixelFormat, AVFilterBufferRef *);
~FilterBufferImage ();
uint8_t ** data () const;
int * line_size () const;
int * stride () const;
Size size () const;
private:
AVFilterBufferRef* _buffer;
};
/** @class SimpleImage
* @brief An Image for which memory is allocated using a `simple' av_malloc().
*/
class SimpleImage : public Image
{
public:
SimpleImage (AVPixelFormat, Size, boost::function<int (int)> rounder);
~SimpleImage ();
uint8_t ** data () const;
int * line_size () const;
int * stride () const;
Size size () const;
private:
Size _size; ///< size in pixels
uint8_t** _data; ///< array of pointers to components
int* _line_size; ///< array of sizes of the data in each line, in pixels (without any alignment padding bytes)
int* _stride; ///< array of strides for each line (including any alignment padding bytes)
};
class AlignedImage : public SimpleImage
{
public:
AlignedImage (AVPixelFormat, Size);
};
class CompactImage : public SimpleImage
{
public:
CompactImage (AVPixelFormat, Size);
CompactImage (boost::shared_ptr<Image>);
};
/** @class RGBFrameImage
* @brief An RGB image that is held within an AVFrame.
*/
class RGBFrameImage : public Image
{
public:
RGBFrameImage (Size);
~RGBFrameImage ();
uint8_t ** data () const;
int * line_size () const;
int * stride () const;
Size size () const;
AVFrame * frame () const {
return _frame;
}
private:
Size _size;
AVFrame* _frame;
uint8_t* _data;
};
#endif
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