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libavutil/pixdesc.h

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00001 /*
00002  * pixel format descriptor
00003  * Copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #ifndef AVUTIL_PIXDESC_H
00023 #define AVUTIL_PIXDESC_H
00024 
00025 #include <inttypes.h>
00026 
00027 typedef struct AVComponentDescriptor{
00028     uint16_t plane        :2;            
00029 
00034     uint16_t step_minus1  :3;
00035 
00040     uint16_t offset_plus1 :3;
00041     uint16_t shift        :3;            
00042     uint16_t depth_minus1 :4;            
00043 }AVComponentDescriptor;
00044 
00054 typedef struct AVPixFmtDescriptor{
00055     const char *name;
00056     uint8_t nb_components;      
00057 
00065     uint8_t log2_chroma_w;      
00066 
00074     uint8_t log2_chroma_h;
00075     uint8_t flags;
00076 
00082     AVComponentDescriptor comp[4];
00083 }AVPixFmtDescriptor;
00084 
00085 #define PIX_FMT_BE        1 ///< Pixel format is big-endian.
00086 #define PIX_FMT_PAL       2 ///< Pixel format has a palette in data[1], values are indexes in this palette.
00087 #define PIX_FMT_BITSTREAM 4 ///< All values of a component are bit-wise packed end to end.
00088 #define PIX_FMT_HWACCEL   8 ///< Pixel format is an HW accelerated format.
00089 
00093 extern const AVPixFmtDescriptor av_pix_fmt_descriptors[];
00094 
00111 void read_line(uint16_t *dst, const uint8_t *data[4], const int linesize[4],
00112                const AVPixFmtDescriptor *desc, int x, int y, int c, int w, int read_pal_component);
00113 
00128 void write_line(const uint16_t *src, uint8_t *data[4], const int linesize[4],
00129                 const AVPixFmtDescriptor *desc, int x, int y, int c, int w);
00130 
00142 enum PixelFormat av_get_pix_fmt(const char *name);
00143 
00152 int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc);
00153 
00154 #endif /* AVUTIL_PIXDESC_H */

Generated on Fri Sep 16 2011 17:17:51 for FFmpeg by  doxygen 1.7.1