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>
30 #include <libavcodec/avcodec.h>
31 #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.
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 Size size () const = 0;
69 int components () const;
70 int lines (int) const;
71 boost::shared_ptr<Image> scale_and_convert_to_rgb (Size, int, Scaler const *) const;
72 boost::shared_ptr<Image> scale (Size, Scaler const *) const;
73 boost::shared_ptr<Image> post_process (std::string) const;
74 void alpha_blend (boost::shared_ptr<Image> image, Position pos);
78 PixelFormat pixel_format () const {
83 PixelFormat _pixel_format; ///< FFmpeg's way of describing the pixel format of this Image
86 /** @class FilterBufferImage
87 * @brief An Image that is held in an AVFilterBufferRef.
89 class FilterBufferImage : public Image
92 FilterBufferImage (PixelFormat, AVFilterBufferRef *);
93 ~FilterBufferImage ();
95 uint8_t ** data () const;
96 int * line_size () const;
97 int * stride () const;
101 AVFilterBufferRef* _buffer;
104 /** @class SimpleImage
105 * @brief An Image for which memory is allocated using a `simple' av_malloc().
107 class SimpleImage : public Image
110 SimpleImage (PixelFormat, Size);
113 uint8_t ** data () const;
114 int * line_size () const;
115 int * stride () const;
119 Size _size; ///< size in pixels
120 uint8_t** _data; ///< array of pointers to components
121 int* _line_size; ///< array of sizes of the data in each line, in pixels (without any alignment padding bytes)
122 int* _stride; ///< array of strides for each line (including any alignment padding bytes)
126 /** @class RGBFrameImage
127 * @brief An RGB image that is held within an AVFrame.
129 class RGBFrameImage : public Image
132 RGBFrameImage (Size);
135 uint8_t ** data () const;
136 int * line_size () const;
137 int * stride () const;
139 AVFrame * frame () const {