2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * @brief A set of classes to describe video images.
24 #ifndef DVDOMATIC_IMAGE_H
25 #define DVDOMATIC_IMAGE_H
28 #include <boost/shared_ptr.hpp>
29 #include <boost/function.hpp>
31 #include <libavcodec/avcodec.h>
32 #include <libavfilter/avfilter.h>
40 * @brief Parent class for wrappers of some image, in some format, that
41 * can present a set of components and a size in pixels.
43 * This class also has some conversion / processing methods.
45 * The main point of this class (and its subclasses) is to abstract
46 * details of FFmpeg's memory management and varying data formats.
51 Image (AVPixelFormat p)
57 /** @return Array of pointers to arrays of the component data */
58 virtual uint8_t ** data () const = 0;
60 /** @return Array of sizes of the data in each line, in bytes (without any alignment padding bytes) */
61 virtual int * line_size () const = 0;
63 /** @return Array of strides for each line (including any alignment padding bytes) */
64 virtual int * stride () const = 0;
66 /** @return Size of the image, in pixels */
67 virtual libdcp::Size size () const = 0;
69 virtual bool aligned () const = 0;
71 int components () const;
72 int lines (int) const;
74 boost::shared_ptr<Image> scale_and_convert_to_rgb (libdcp::Size out_size, int padding, Scaler const * scaler, bool aligned) const;
75 boost::shared_ptr<Image> scale (libdcp::Size, Scaler const *, bool aligned) const;
76 boost::shared_ptr<Image> post_process (std::string, bool aligned) const;
77 void alpha_blend (boost::shared_ptr<const Image> image, Position pos);
78 boost::shared_ptr<Image> crop (Crop c, bool aligned) const;
82 void read_from_socket (boost::shared_ptr<Socket>);
83 void write_to_socket (boost::shared_ptr<Socket>) const;
85 AVPixelFormat pixel_format () const {
90 virtual void swap (Image &);
91 float bytes_per_pixel (int) const;
93 friend class pixel_formats_test;
96 void yuv_16_black (uint16_t);
97 static uint16_t swap_16 (uint16_t);
99 AVPixelFormat _pixel_format; ///< FFmpeg's way of describing the pixel format of this Image
102 /** @class SimpleImage
103 * @brief An Image for which memory is allocated using a `simple' av_malloc().
105 class SimpleImage : public Image
108 SimpleImage (AVPixelFormat, libdcp::Size, bool);
109 SimpleImage (AVFrame *);
110 SimpleImage (SimpleImage const &);
111 SimpleImage (boost::shared_ptr<const Image>);
112 SimpleImage& operator= (SimpleImage const &);
115 uint8_t ** data () const;
116 int * line_size () const;
117 int * stride () const;
118 libdcp::Size size () const;
119 bool aligned () const;
123 void swap (SimpleImage &);
126 libdcp::Size _size; ///< size in pixels
127 uint8_t** _data; ///< array of pointers to components
128 int* _line_size; ///< array of sizes of the data in each line, in pixels (without any alignment padding bytes)
129 int* _stride; ///< array of strides for each line (including any alignment padding bytes)
133 class RGBPlusAlphaImage : public SimpleImage
136 RGBPlusAlphaImage (boost::shared_ptr<const Image>);
137 ~RGBPlusAlphaImage ();
139 uint8_t* alpha () const {