repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * PNG image format | |
| 3 | * Copyright (c) 2003 Fabrice Bellard | |
| 4 | * | |
| 5 | * This file is part of FFmpeg. | |
| 6 | * | |
| 7 | * FFmpeg is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; either | |
| 10 | * version 2.1 of the License, or (at your option) any later version. | |
| 11 | * | |
| 12 | * FFmpeg is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with FFmpeg; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef AVCODEC_PNG_H | |
| 23 | #define AVCODEC_PNG_H | |
| 24 | ||
| 25 | #include <stdint.h> | |
| 26 | ||
| 27 | #define PNG_COLOR_MASK_PALETTE 1 | |
| 28 | #define PNG_COLOR_MASK_COLOR 2 | |
| 29 | #define PNG_COLOR_MASK_ALPHA 4 | |
| 30 | ||
| 31 | #define PNG_COLOR_TYPE_GRAY 0 | |
| 32 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) | |
| 33 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) | |
| 34 | #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) | |
| 35 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) | |
| 36 | ||
| 37 | #define PNG_FILTER_TYPE_LOCO 64 | |
| 38 | #define PNG_FILTER_VALUE_NONE 0 | |
| 39 | #define PNG_FILTER_VALUE_SUB 1 | |
| 40 | #define PNG_FILTER_VALUE_UP 2 | |
| 41 | #define PNG_FILTER_VALUE_AVG 3 | |
| 42 | #define PNG_FILTER_VALUE_PAETH 4 | |
| 43 | #define PNG_FILTER_VALUE_MIXED 5 | |
| 44 | ||
| 45 | #define PNG_IHDR 0x0001 | |
| 46 | #define PNG_IDAT 0x0002 | |
| 47 | #define PNG_ALLIMAGE 0x0004 | |
| 48 | #define PNG_PLTE 0x0008 | |
| 49 | ||
| 50 | #define NB_PASSES 7 | |
| 51 | ||
| 52 | #define PNGSIG 0x89504e470d0a1a0a | |
| 53 | #define MNGSIG 0x8a4d4e470d0a1a0a | |
| 54 | ||
| 55 | /* Mask to determine which y pixels are valid in a pass */ | |
| 56 | extern const uint8_t ff_png_pass_ymask[NB_PASSES]; | |
| 57 | ||
| 58 | void *ff_png_zalloc(void *opaque, unsigned int items, unsigned int size); | |
| 59 | ||
| 60 | void ff_png_zfree(void *opaque, void *ptr); | |
| 61 | ||
| 62 | int ff_png_get_nb_channels(int color_type); | |
| 63 | ||
| 64 | /* compute the row size of an interleaved pass */ | |
| 65 | int ff_png_pass_row_size(int pass, int bits_per_pixel, int width); | |
| 66 | ||
| 67 | void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp); | |
| 68 | ||
| 69 | #endif /* AVCODEC_PNG_H */ |