repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Colorspace conversion defines | |
| 3 | * Copyright (c) 2001, 2002, 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 | /** | |
| 23 | * @file | |
| 24 | * Various defines for YUV<->RGB conversion | |
| 25 | */ | |
| 26 | ||
| 27 | #ifndef AVUTIL_COLORSPACE_H | |
| 28 | #define AVUTIL_COLORSPACE_H | |
| 29 | ||
| 30 | #define SCALEBITS 10 | |
| 31 | #define ONE_HALF (1 << (SCALEBITS - 1)) | |
| 32 | #define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5)) | |
| 33 | ||
| 34 | #define YUV_TO_RGB1_CCIR(cb1, cr1)\ | |
| 35 | {\ | |
| 36 | cb = (cb1) - 128;\ | |
| 37 | cr = (cr1) - 128;\ | |
| 38 | r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\ | |
| 39 | g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \ | |
| 40 | ONE_HALF;\ | |
| 41 | b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\ | |
| 42 | } | |
| 43 | ||
| 44 | #define YUV_TO_RGB2_CCIR(r, g, b, y1)\ | |
| 45 | {\ | |
| 46 | y = ((y1) - 16) * FIX(255.0/219.0);\ | |
| 47 | r = cm[(y + r_add) >> SCALEBITS];\ | |
| 48 | g = cm[(y + g_add) >> SCALEBITS];\ | |
| 49 | b = cm[(y + b_add) >> SCALEBITS];\ | |
| 50 | } | |
| 51 | ||
| 52 | #define YUV_TO_RGB1(cb1, cr1)\ | |
| 53 | {\ | |
| 54 | cb = (cb1) - 128;\ | |
| 55 | cr = (cr1) - 128;\ | |
| 56 | r_add = FIX(1.40200) * cr + ONE_HALF;\ | |
| 57 | g_add = - FIX(0.34414) * cb - FIX(0.71414) * cr + ONE_HALF;\ | |
| 58 | b_add = FIX(1.77200) * cb + ONE_HALF;\ | |
| 59 | } | |
| 60 | ||
| 61 | #define YUV_TO_RGB2(r, g, b, y1)\ | |
| 62 | {\ | |
| 63 | y = (y1) << SCALEBITS;\ | |
| 64 | r = cm[(y + r_add) >> SCALEBITS];\ | |
| 65 | g = cm[(y + g_add) >> SCALEBITS];\ | |
| 66 | b = cm[(y + b_add) >> SCALEBITS];\ | |
| 67 | } | |
| 68 | ||
| 69 | #define Y_CCIR_TO_JPEG(y)\ | |
| 70 | cm[((y) * FIX(255.0/219.0) + (ONE_HALF - 16 * FIX(255.0/219.0))) >> SCALEBITS] | |
| 71 | ||
| 72 | #define Y_JPEG_TO_CCIR(y)\ | |
| 73 | (((y) * FIX(219.0/255.0) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS) | |
| 74 | ||
| 75 | #define C_CCIR_TO_JPEG(y)\ | |
| 76 | cm[(((y) - 128) * FIX(127.0/112.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS] | |
| 77 | ||
| 78 | /* NOTE: the clamp is really necessary! */ | |
| 79 | static inline int C_JPEG_TO_CCIR(int y) { | |
| 80 | y = (((y - 128) * FIX(112.0/127.0) + (ONE_HALF + (128 << SCALEBITS))) >> SCALEBITS); | |
| 81 | if (y < 16) | |
| 82 | y = 16; | |
| 83 | return y; | |
| 84 | } | |
| 85 | ||
| 86 | ||
| 87 | #define RGB_TO_Y(r, g, b) \ | |
| 88 | ((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \ | |
| 89 | FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS) | |
| 90 | ||
| 91 | #define RGB_TO_U(r1, g1, b1, shift)\ | |
| 92 | (((- FIX(0.16874) * r1 - FIX(0.33126) * g1 + \ | |
| 93 | FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) | |
| 94 | ||
| 95 | #define RGB_TO_V(r1, g1, b1, shift)\ | |
| 96 | (((FIX(0.50000) * r1 - FIX(0.41869) * g1 - \ | |
| 97 | FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) | |
| 98 | ||
| 99 | #define RGB_TO_Y_CCIR(r, g, b) \ | |
| 100 | ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \ | |
| 101 | FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS) | |
| 102 | ||
| 103 | #define RGB_TO_U_CCIR(r1, g1, b1, shift)\ | |
| 104 | (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 + \ | |
| 105 | FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) | |
| 106 | ||
| 107 | #define RGB_TO_V_CCIR(r1, g1, b1, shift)\ | |
| 108 | (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 - \ | |
| 109 | FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128) | |
| 110 | ||
| 111 | #endif /* AVUTIL_COLORSPACE_H */ |