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>
41 * @brief Parent class for wrappers of some image, in some format, that
42 * can present a set of components and a size in pixels.
44 * This class also has some conversion / processing methods.
46 * The main point of this class (and its subclasses) is to abstract
47 * details of FFmpeg's memory management and varying data formats.
52 Image (AVPixelFormat p)
58 /** @return Array of pointers to arrays of the component data */
59 virtual uint8_t ** data () const = 0;
61 /** @return Array of sizes of the data in each line, in bytes (without any alignment padding bytes) */
62 virtual int * line_size () const = 0;
64 /** @return Array of strides for each line (including any alignment padding bytes) */
65 virtual int * stride () const = 0;
67 /** @return Size of the image, in pixels */
68 virtual libdcp::Size size () const = 0;
70 virtual bool aligned () const = 0;
72 int components () const;
73 int lines (int) const;
75 boost::shared_ptr<Image> scale_and_convert_to_rgb (libdcp::Size out_size, int padding, Scaler const * scaler, bool aligned) const;
76 boost::shared_ptr<Image> scale (libdcp::Size, Scaler const *, bool aligned) const;
77 boost::shared_ptr<Image> post_process (std::string, bool aligned) const;
78 void alpha_blend (boost::shared_ptr<const Image> image, Position pos);
79 boost::shared_ptr<Image> crop (Crop c, bool aligned) const;
83 void read_from_socket (boost::shared_ptr<Socket>);
84 void write_to_socket (boost::shared_ptr<Socket>) const;
86 AVPixelFormat pixel_format () const {
91 virtual void swap (Image &);
92 float bytes_per_pixel (int) const;
94 friend class pixel_formats_test;
97 void yuv_16_black (uint16_t);
98 static uint16_t swap_16 (uint16_t);
100 AVPixelFormat _pixel_format; ///< FFmpeg's way of describing the pixel format of this Image
103 /** @class FrameImage
104 * @brief An Image that is held in an AVFrame.
106 class FrameImage : public Image
109 FrameImage (AVFrame *);
112 uint8_t ** data () const;
113 int * line_size () const;
114 int * stride () const;
115 libdcp::Size size () const;
116 bool aligned () const;
120 FrameImage (FrameImage const &);
121 FrameImage& operator= (FrameImage const &);
127 /** @class SimpleImage
128 * @brief An Image for which memory is allocated using a `simple' av_malloc().
130 class SimpleImage : public Image
133 SimpleImage (AVPixelFormat, libdcp::Size, bool);
134 SimpleImage (SimpleImage const &);
135 SimpleImage (boost::shared_ptr<const Image>);
136 SimpleImage& operator= (SimpleImage const &);
139 uint8_t ** data () const;
140 int * line_size () const;
141 int * stride () const;
142 libdcp::Size size () const;
143 bool aligned () const;
147 void swap (SimpleImage &);
150 libdcp::Size _size; ///< size in pixels
151 uint8_t** _data; ///< array of pointers to components
152 int* _line_size; ///< array of sizes of the data in each line, in pixels (without any alignment padding bytes)
153 int* _stride; ///< array of strides for each line (including any alignment padding bytes)
157 class RGBPlusAlphaImage : public SimpleImage
160 RGBPlusAlphaImage (boost::shared_ptr<const Image>);
161 ~RGBPlusAlphaImage ();
163 uint8_t* alpha () const {