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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * CCITT Fax Group 3 and 4 decompression |
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| 3 | * Copyright (c) 2008 Konstantin Shishkov |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * CCITT Fax Group 3 and 4 decompression |
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| 25 | * @author Konstantin Shishkov |
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| 26 | */ |
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| 27 | #include "avcodec.h" |
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| 28 | #include "get_bits.h" |
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| 29 | #include "put_bits.h" |
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| 30 | #include "faxcompr.h" |
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| 31 | |||
| 32 | #define CCITT_SYMS 104 |
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| 33 | |||
| 34 | static const uint16_t ccitt_syms[CCITT_SYMS] = { |
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| 35 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, |
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| 36 | 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, |
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| 37 | 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, |
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| 38 | 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, |
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| 39 | 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, |
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| 40 | 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, |
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| 41 | 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728, |
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| 42 | 1792, 1856, 1920, 1984, 2048, 2112, 2176, 2240, 2304, 2368, 2432, 2496, 2560 |
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| 43 | }; |
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| 44 | |||
| 45 | static const uint8_t ccitt_codes_bits[2][CCITT_SYMS] = |
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| 46 | { |
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| 47 | { |
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| 48 | 0x35, 0x07, 0x07, 0x08, 0x0B, 0x0C, 0x0E, 0x0F, 0x13, 0x14, 0x07, 0x08, 0x08, |
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| 49 | 0x03, 0x34, 0x35, 0x2A, 0x2B, 0x27, 0x0C, 0x08, 0x17, 0x03, 0x04, 0x28, 0x2B, |
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| 50 | 0x13, 0x24, 0x18, 0x02, 0x03, 0x1A, 0x1B, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, |
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| 51 | 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x04, 0x05, 0x0A, 0x0B, 0x52, 0x53, 0x54, |
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| 52 | 0x55, 0x24, 0x25, 0x58, 0x59, 0x5A, 0x5B, 0x4A, 0x4B, 0x32, 0x33, 0x34, 0x1B, |
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| 53 | 0x12, 0x17, 0x37, 0x36, 0x37, 0x64, 0x65, 0x68, 0x67, 0xCC, 0xCD, 0xD2, 0xD3, |
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| 54 | 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0x98, 0x99, 0x9A, 0x18, 0x9B, |
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| 55 | 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F |
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| 56 | }, |
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| 57 | { |
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| 58 | 0x37, 0x02, 0x03, 0x02, 0x03, 0x03, 0x02, 0x03, 0x05, 0x04, 0x04, 0x05, 0x07, |
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| 59 | 0x04, 0x07, 0x18, 0x17, 0x18, 0x08, 0x67, 0x68, 0x6C, 0x37, 0x28, 0x17, 0x18, |
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| 60 | 0xCA, 0xCB, 0xCC, 0xCD, 0x68, 0x69, 0x6A, 0x6B, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, |
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| 61 | 0xD7, 0x6C, 0x6D, 0xDA, 0xDB, 0x54, 0x55, 0x56, 0x57, 0x64, 0x65, 0x52, 0x53, |
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| 62 | 0x24, 0x37, 0x38, 0x27, 0x28, 0x58, 0x59, 0x2B, 0x2C, 0x5A, 0x66, 0x67, 0x0F, |
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| 63 | 0xC8, 0xC9, 0x5B, 0x33, 0x34, 0x35, 0x6C, 0x6D, 0x4A, 0x4B, 0x4C, 0x4D, 0x72, |
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| 64 | 0x73, 0x74, 0x75, 0x76, 0x77, 0x52, 0x53, 0x54, 0x55, 0x5A, 0x5B, 0x64, 0x65, |
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| 65 | 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F |
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| 66 | } |
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| 67 | }; |
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| 68 | |||
| 69 | static const uint8_t ccitt_codes_lens[2][CCITT_SYMS] = |
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| 70 | { |
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| 71 | { |
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| 72 | 8, 6, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, |
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| 73 | 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, |
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| 74 | 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, |
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| 75 | 8, 8, 8, 8, 5, 5, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, |
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| 76 | 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 9, 11, 11, 11, 12, 12, 12, 12, 12, 12, |
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| 77 | 12, 12, 12, 12 |
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| 78 | }, |
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| 79 | { |
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| 80 | 10, 3, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 7, 8, 8, 9, 10, 10, 10, 11, |
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| 81 | 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, |
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| 82 | 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, |
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| 83 | 12, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, |
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| 84 | 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 12, 12, 12, 12, 12, 12, |
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| 85 | 12, 12, 12, 12 |
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| 86 | } |
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| 87 | }; |
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| 88 | |||
| 89 | static const uint8_t ccitt_group3_2d_bits[11] = { |
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| 90 | 1, 1, 2, 2, 2, 1, 3, 3, 3, 1, 1 |
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| 91 | }; |
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| 92 | |||
| 93 | static const uint8_t ccitt_group3_2d_lens[11] = { |
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| 94 | 4, 3, 7, 6, 3, 1, 3, 6, 7, 7, 9 |
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| 95 | }; |
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| 96 | |||
| 97 | static VLC ccitt_vlc[2], ccitt_group3_2d_vlc; |
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| 98 | |||
| 99 | av_cold void ff_ccitt_unpack_init(void) |
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| 100 | { |
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| 101 | static VLC_TYPE code_table1[528][2]; |
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| 102 | static VLC_TYPE code_table2[648][2]; |
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| 103 | int i; |
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| 104 | static int initialized = 0; |
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| 105 | |||
| 106 | if (initialized) |
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| 107 | return; |
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| 108 | ccitt_vlc[0].table = code_table1; |
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| 109 | ccitt_vlc[0].table_allocated = 528; |
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| 110 | ccitt_vlc[1].table = code_table2; |
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| 111 | ccitt_vlc[1].table_allocated = 648; |
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| 112 | for (i = 0; i < 2; i++) { |
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| 113 | ff_init_vlc_sparse(&ccitt_vlc[i], 9, CCITT_SYMS, |
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| 114 | ccitt_codes_lens[i], 1, 1, |
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| 115 | ccitt_codes_bits[i], 1, 1, |
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| 116 | ccitt_syms, 2, 2, |
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| 117 | INIT_VLC_USE_NEW_STATIC); |
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| 118 | } |
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| 119 | INIT_VLC_STATIC(&ccitt_group3_2d_vlc, 9, 11, |
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| 120 | ccitt_group3_2d_lens, 1, 1, |
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| 121 | ccitt_group3_2d_bits, 1, 1, 512); |
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| 122 | initialized = 1; |
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| 123 | } |
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| 124 | |||
| 125 | |||
| 126 | static int decode_group3_1d_line(AVCodecContext *avctx, GetBitContext *gb, |
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| 127 | unsigned int pix_left, int *runs, |
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| 128 | const int *runend) |
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| 129 | { |
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| 130 | int mode = 0; |
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| 131 | unsigned int run = 0; |
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| 132 | unsigned int t; |
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| 133 | for (;;) { |
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| 134 | t = get_vlc2(gb, ccitt_vlc[mode].table, 9, 2); |
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| 135 | run += t; |
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| 136 | if (t < 64) { |
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| 137 | *runs++ = run; |
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| 138 | if (runs >= runend) { |
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| 139 | av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); |
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| 140 | return AVERROR_INVALIDDATA; |
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| 141 | } |
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| 142 | if (pix_left <= run) { |
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| 143 | if (pix_left == run) |
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| 144 | break; |
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| 145 | av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); |
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| 146 | return AVERROR_INVALIDDATA; |
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| 147 | } |
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| 148 | pix_left -= run; |
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| 149 | run = 0; |
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| 150 | mode = !mode; |
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| 151 | } else if ((int)t == -1) { |
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| 152 | av_log(avctx, AV_LOG_ERROR, "Incorrect code\n"); |
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| 153 | return AVERROR_INVALIDDATA; |
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| 154 | } |
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| 155 | } |
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| 156 | *runs++ = 0; |
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| 157 | return 0; |
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| 158 | } |
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| 159 | |||
| 160 | static int decode_group3_2d_line(AVCodecContext *avctx, GetBitContext *gb, |
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| 161 | unsigned int width, int *runs, |
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| 162 | const int *runend, const int *ref) |
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| 163 | { |
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| 164 | int mode = 0, saved_run = 0, t; |
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| 165 | int run_off = *ref++; |
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| 166 | unsigned int offs = 0, run = 0; |
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| 167 | |||
| 168 | while (offs < width) { |
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| 169 | int cmode = get_vlc2(gb, ccitt_group3_2d_vlc.table, 9, 1); |
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| 170 | if (cmode == -1) { |
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| 171 | av_log(avctx, AV_LOG_ERROR, "Incorrect mode VLC\n"); |
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| 172 | return AVERROR_INVALIDDATA; |
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| 173 | } |
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| 174 | if (!cmode) { //pass mode |
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| 175 | if (run_off < width) |
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| 176 | run_off += *ref++; |
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| 177 | run = run_off - offs; |
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| 178 | offs = run_off; |
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| 179 | if (run_off < width) |
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| 180 | run_off += *ref++; |
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| 181 | if (offs > width) { |
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| 182 | av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); |
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| 183 | return AVERROR_INVALIDDATA; |
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| 184 | } |
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| 185 | saved_run += run; |
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| 186 | } else if (cmode == 1) { //horizontal mode |
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| 187 | int k; |
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| 188 | for (k = 0; k < 2; k++) { |
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| 189 | run = 0; |
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| 190 | for (;;) { |
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| 191 | t = get_vlc2(gb, ccitt_vlc[mode].table, 9, 2); |
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| 192 | if (t == -1) { |
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| 193 | av_log(avctx, AV_LOG_ERROR, "Incorrect code\n"); |
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| 194 | return AVERROR_INVALIDDATA; |
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| 195 | } |
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| 196 | run += t; |
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| 197 | if (t < 64) |
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| 198 | break; |
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| 199 | } |
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| 200 | *runs++ = run + saved_run; |
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| 201 | if (runs >= runend) { |
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| 202 | av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); |
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| 203 | return AVERROR_INVALIDDATA; |
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| 204 | } |
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| 205 | saved_run = 0; |
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| 206 | offs += run; |
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| 207 | if (offs > width || run > width) { |
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| 208 | av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); |
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| 209 | return AVERROR_INVALIDDATA; |
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| 210 | } |
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| 211 | mode = !mode; |
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| 212 | } |
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| 213 | } else if (cmode == 9 || cmode == 10) { |
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| 214 | avpriv_report_missing_feature(avctx, "Special modes support"); |
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| 215 | return AVERROR_PATCHWELCOME; |
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| 216 | } else { //vertical mode |
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| 217 | run = run_off - offs + (cmode - 5); |
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| 218 | run_off -= *--ref; |
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| 219 | offs += run; |
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| 220 | if (offs > width || run > width) { |
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| 221 | av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); |
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| 222 | return AVERROR_INVALIDDATA; |
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| 223 | } |
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| 224 | *runs++ = run + saved_run; |
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| 225 | if (runs >= runend) { |
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| 226 | av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); |
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| 227 | return AVERROR_INVALIDDATA; |
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| 228 | } |
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| 229 | saved_run = 0; |
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| 230 | mode = !mode; |
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| 231 | } |
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| 232 | //sync line pointers |
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| 233 | while (offs < width && run_off <= offs) { |
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| 234 | run_off += *ref++; |
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| 235 | run_off += *ref++; |
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| 236 | } |
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| 237 | } |
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| 238 | *runs++ = saved_run; |
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| 239 | if (saved_run) { |
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| 240 | if (runs >= runend) { |
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| 241 | av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); |
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| 242 | return -1; |
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| 243 | } |
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| 244 | *runs++ = 0; |
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| 245 | } |
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| 246 | return 0; |
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| 247 | } |
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| 248 | |||
| 249 | static void put_line(uint8_t *dst, int size, int width, const int *runs) |
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| 250 | { |
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| 251 | PutBitContext pb; |
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| 252 | int run, mode = ~0, pix_left = width, run_idx = 0; |
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| 253 | |||
| 254 | init_put_bits(&pb, dst, size * 8); |
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| 255 | while (pix_left > 0) { |
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| 256 | run = runs[run_idx++]; |
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| 257 | mode = ~mode; |
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| 258 | pix_left -= run; |
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| 259 | for (; run > 16; run -= 16) |
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| 260 | put_sbits(&pb, 16, mode); |
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| 261 | if (run) |
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| 262 | put_sbits(&pb, run, mode); |
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| 263 | } |
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| 264 | flush_put_bits(&pb); |
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| 265 | } |
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| 266 | |||
| 267 | static int find_group3_syncmarker(GetBitContext *gb, int srcsize) |
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| 268 | { |
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| 269 | unsigned int state = -1; |
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| 270 | srcsize -= get_bits_count(gb); |
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| 271 | while (srcsize-- > 0) { |
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| 272 | state += state + get_bits1(gb); |
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| 273 | if ((state & 0xFFF) == 1) |
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| 274 | return 0; |
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| 275 | } |
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| 276 | return -1; |
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| 277 | } |
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| 278 | |||
| 279 | int ff_ccitt_unpack(AVCodecContext *avctx, const uint8_t *src, int srcsize, |
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| 280 | uint8_t *dst, int height, int stride, |
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| 281 | enum TiffCompr compr, int opts) |
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| 282 | { |
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| 283 | int j; |
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| 284 | GetBitContext gb; |
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| 285 | int *runs, *ref = NULL, *runend; |
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| 286 | int ret; |
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| 287 | int runsize = avctx->width + 2; |
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| 288 | int has_eol; |
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| 289 | |||
| 290 | runs = av_malloc(runsize * sizeof(runs[0])); |
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| 291 | ref = av_malloc(runsize * sizeof(ref[0])); |
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| 292 | if (!runs || !ref) { |
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| 293 | ret = AVERROR(ENOMEM); |
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| 294 | goto fail; |
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| 295 | } |
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| 296 | ref[0] = avctx->width; |
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| 297 | ref[1] = 0; |
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| 298 | ref[2] = 0; |
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| 299 | init_get_bits(&gb, src, srcsize * 8); |
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| 300 | has_eol = show_bits(&gb, 12) == 1 || show_bits(&gb, 16) == 1; |
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| 301 | |||
| 302 | for (j = 0; j < height; j++) { |
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| 303 | runend = runs + runsize; |
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| 304 | if (compr == TIFF_G4) { |
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| 305 | ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, runend, |
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| 306 | ref); |
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| 307 | if (ret < 0) |
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| 308 | goto fail; |
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| 309 | } else { |
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| 310 | int g3d1 = (compr == TIFF_G3) && !(opts & 1); |
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| 311 | if (compr != TIFF_CCITT_RLE && |
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| 312 | has_eol && |
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| 313 | find_group3_syncmarker(&gb, srcsize * 8) < 0) |
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| 314 | break; |
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| 315 | if (compr == TIFF_CCITT_RLE || g3d1 || get_bits1(&gb)) |
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| 316 | ret = decode_group3_1d_line(avctx, &gb, avctx->width, runs, |
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| 317 | runend); |
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| 318 | else |
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| 319 | ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, |
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| 320 | runend, ref); |
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| 321 | if (compr == TIFF_CCITT_RLE) |
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| 322 | align_get_bits(&gb); |
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| 323 | } |
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| 324 | if (avctx->err_recognition & AV_EF_EXPLODE && ret < 0) |
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| 325 | goto fail; |
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| 326 | |||
| 327 | if (ret < 0) { |
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| 328 | put_line(dst, stride, avctx->width, ref); |
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| 329 | } else { |
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| 330 | put_line(dst, stride, avctx->width, runs); |
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| 331 | FFSWAP(int *, runs, ref); |
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| 332 | } |
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| 333 | dst += stride; |
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| 334 | } |
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| 335 | ret = 0; |
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| 336 | fail: |
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| 337 | av_free(runs); |
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| 338 | av_free(ref); |
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| 339 | return ret; |
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| 340 | } |