diff options
Diffstat (limited to 'ffmpeg/libavcodec/faxcompr.c')
| -rw-r--r-- | ffmpeg/libavcodec/faxcompr.c | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/ffmpeg/libavcodec/faxcompr.c b/ffmpeg/libavcodec/faxcompr.c deleted file mode 100644 index 900851b..0000000 --- a/ffmpeg/libavcodec/faxcompr.c +++ /dev/null @@ -1,340 +0,0 @@ -/* - * CCITT Fax Group 3 and 4 decompression - * Copyright (c) 2008 Konstantin Shishkov - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * CCITT Fax Group 3 and 4 decompression - * @author Konstantin Shishkov - */ -#include "avcodec.h" -#include "get_bits.h" -#include "put_bits.h" -#include "faxcompr.h" - -#define CCITT_SYMS 104 - -static const uint16_t ccitt_syms[CCITT_SYMS] = { - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, - 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, - 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, - 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, - 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, - 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, - 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728, - 1792, 1856, 1920, 1984, 2048, 2112, 2176, 2240, 2304, 2368, 2432, 2496, 2560 -}; - -static const uint8_t ccitt_codes_bits[2][CCITT_SYMS] = -{ - { - 0x35, 0x07, 0x07, 0x08, 0x0B, 0x0C, 0x0E, 0x0F, 0x13, 0x14, 0x07, 0x08, 0x08, - 0x03, 0x34, 0x35, 0x2A, 0x2B, 0x27, 0x0C, 0x08, 0x17, 0x03, 0x04, 0x28, 0x2B, - 0x13, 0x24, 0x18, 0x02, 0x03, 0x1A, 0x1B, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, - 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x04, 0x05, 0x0A, 0x0B, 0x52, 0x53, 0x54, - 0x55, 0x24, 0x25, 0x58, 0x59, 0x5A, 0x5B, 0x4A, 0x4B, 0x32, 0x33, 0x34, 0x1B, - 0x12, 0x17, 0x37, 0x36, 0x37, 0x64, 0x65, 0x68, 0x67, 0xCC, 0xCD, 0xD2, 0xD3, - 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0x98, 0x99, 0x9A, 0x18, 0x9B, - 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F - }, - { - 0x37, 0x02, 0x03, 0x02, 0x03, 0x03, 0x02, 0x03, 0x05, 0x04, 0x04, 0x05, 0x07, - 0x04, 0x07, 0x18, 0x17, 0x18, 0x08, 0x67, 0x68, 0x6C, 0x37, 0x28, 0x17, 0x18, - 0xCA, 0xCB, 0xCC, 0xCD, 0x68, 0x69, 0x6A, 0x6B, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, - 0xD7, 0x6C, 0x6D, 0xDA, 0xDB, 0x54, 0x55, 0x56, 0x57, 0x64, 0x65, 0x52, 0x53, - 0x24, 0x37, 0x38, 0x27, 0x28, 0x58, 0x59, 0x2B, 0x2C, 0x5A, 0x66, 0x67, 0x0F, - 0xC8, 0xC9, 0x5B, 0x33, 0x34, 0x35, 0x6C, 0x6D, 0x4A, 0x4B, 0x4C, 0x4D, 0x72, - 0x73, 0x74, 0x75, 0x76, 0x77, 0x52, 0x53, 0x54, 0x55, 0x5A, 0x5B, 0x64, 0x65, - 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F - } -}; - -static const uint8_t ccitt_codes_lens[2][CCITT_SYMS] = -{ - { - 8, 6, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, - 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, - 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, - 8, 8, 8, 8, 5, 5, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, - 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 9, 11, 11, 11, 12, 12, 12, 12, 12, 12, - 12, 12, 12, 12 - }, - { - 10, 3, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 7, 8, 8, 9, 10, 10, 10, 11, - 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, - 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, - 12, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, - 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 12, 12, 12, 12, 12, 12, - 12, 12, 12, 12 - } -}; - -static const uint8_t ccitt_group3_2d_bits[11] = { - 1, 1, 2, 2, 2, 1, 3, 3, 3, 1, 1 -}; - -static const uint8_t ccitt_group3_2d_lens[11] = { - 4, 3, 7, 6, 3, 1, 3, 6, 7, 7, 9 -}; - -static VLC ccitt_vlc[2], ccitt_group3_2d_vlc; - -av_cold void ff_ccitt_unpack_init(void) -{ - static VLC_TYPE code_table1[528][2]; - static VLC_TYPE code_table2[648][2]; - int i; - static int initialized = 0; - - if (initialized) - return; - ccitt_vlc[0].table = code_table1; - ccitt_vlc[0].table_allocated = 528; - ccitt_vlc[1].table = code_table2; - ccitt_vlc[1].table_allocated = 648; - for (i = 0; i < 2; i++) { - ff_init_vlc_sparse(&ccitt_vlc[i], 9, CCITT_SYMS, - ccitt_codes_lens[i], 1, 1, - ccitt_codes_bits[i], 1, 1, - ccitt_syms, 2, 2, - INIT_VLC_USE_NEW_STATIC); - } - INIT_VLC_STATIC(&ccitt_group3_2d_vlc, 9, 11, - ccitt_group3_2d_lens, 1, 1, - ccitt_group3_2d_bits, 1, 1, 512); - initialized = 1; -} - - -static int decode_group3_1d_line(AVCodecContext *avctx, GetBitContext *gb, - unsigned int pix_left, int *runs, - const int *runend) -{ - int mode = 0; - unsigned int run = 0; - unsigned int t; - for (;;) { - t = get_vlc2(gb, ccitt_vlc[mode].table, 9, 2); - run += t; - if (t < 64) { - *runs++ = run; - if (runs >= runend) { - av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); - return AVERROR_INVALIDDATA; - } - if (pix_left <= run) { - if (pix_left == run) - break; - av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); - return AVERROR_INVALIDDATA; - } - pix_left -= run; - run = 0; - mode = !mode; - } else if ((int)t == -1) { - av_log(avctx, AV_LOG_ERROR, "Incorrect code\n"); - return AVERROR_INVALIDDATA; - } - } - *runs++ = 0; - return 0; -} - -static int decode_group3_2d_line(AVCodecContext *avctx, GetBitContext *gb, - unsigned int width, int *runs, - const int *runend, const int *ref) -{ - int mode = 0, saved_run = 0, t; - int run_off = *ref++; - unsigned int offs = 0, run = 0; - - while (offs < width) { - int cmode = get_vlc2(gb, ccitt_group3_2d_vlc.table, 9, 1); - if (cmode == -1) { - av_log(avctx, AV_LOG_ERROR, "Incorrect mode VLC\n"); - return AVERROR_INVALIDDATA; - } - if (!cmode) { //pass mode - if (run_off < width) - run_off += *ref++; - run = run_off - offs; - offs = run_off; - if (run_off < width) - run_off += *ref++; - if (offs > width) { - av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); - return AVERROR_INVALIDDATA; - } - saved_run += run; - } else if (cmode == 1) { //horizontal mode - int k; - for (k = 0; k < 2; k++) { - run = 0; - for (;;) { - t = get_vlc2(gb, ccitt_vlc[mode].table, 9, 2); - if (t == -1) { - av_log(avctx, AV_LOG_ERROR, "Incorrect code\n"); - return AVERROR_INVALIDDATA; - } - run += t; - if (t < 64) - break; - } - *runs++ = run + saved_run; - if (runs >= runend) { - av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); - return AVERROR_INVALIDDATA; - } - saved_run = 0; - offs += run; - if (offs > width || run > width) { - av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); - return AVERROR_INVALIDDATA; - } - mode = !mode; - } - } else if (cmode == 9 || cmode == 10) { - avpriv_report_missing_feature(avctx, "Special modes support"); - return AVERROR_PATCHWELCOME; - } else { //vertical mode - run = run_off - offs + (cmode - 5); - run_off -= *--ref; - offs += run; - if (offs > width || run > width) { - av_log(avctx, AV_LOG_ERROR, "Run went out of bounds\n"); - return AVERROR_INVALIDDATA; - } - *runs++ = run + saved_run; - if (runs >= runend) { - av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); - return AVERROR_INVALIDDATA; - } - saved_run = 0; - mode = !mode; - } - //sync line pointers - while (offs < width && run_off <= offs) { - run_off += *ref++; - run_off += *ref++; - } - } - *runs++ = saved_run; - if (saved_run) { - if (runs >= runend) { - av_log(avctx, AV_LOG_ERROR, "Run overrun\n"); - return -1; - } - *runs++ = 0; - } - return 0; -} - -static void put_line(uint8_t *dst, int size, int width, const int *runs) -{ - PutBitContext pb; - int run, mode = ~0, pix_left = width, run_idx = 0; - - init_put_bits(&pb, dst, size * 8); - while (pix_left > 0) { - run = runs[run_idx++]; - mode = ~mode; - pix_left -= run; - for (; run > 16; run -= 16) - put_sbits(&pb, 16, mode); - if (run) - put_sbits(&pb, run, mode); - } - flush_put_bits(&pb); -} - -static int find_group3_syncmarker(GetBitContext *gb, int srcsize) -{ - unsigned int state = -1; - srcsize -= get_bits_count(gb); - while (srcsize-- > 0) { - state += state + get_bits1(gb); - if ((state & 0xFFF) == 1) - return 0; - } - return -1; -} - -int ff_ccitt_unpack(AVCodecContext *avctx, const uint8_t *src, int srcsize, - uint8_t *dst, int height, int stride, - enum TiffCompr compr, int opts) -{ - int j; - GetBitContext gb; - int *runs, *ref = NULL, *runend; - int ret; - int runsize = avctx->width + 2; - int has_eol; - - runs = av_malloc(runsize * sizeof(runs[0])); - ref = av_malloc(runsize * sizeof(ref[0])); - if (!runs || !ref) { - ret = AVERROR(ENOMEM); - goto fail; - } - ref[0] = avctx->width; - ref[1] = 0; - ref[2] = 0; - init_get_bits(&gb, src, srcsize * 8); - has_eol = show_bits(&gb, 12) == 1 || show_bits(&gb, 16) == 1; - - for (j = 0; j < height; j++) { - runend = runs + runsize; - if (compr == TIFF_G4) { - ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, runend, - ref); - if (ret < 0) - goto fail; - } else { - int g3d1 = (compr == TIFF_G3) && !(opts & 1); - if (compr != TIFF_CCITT_RLE && - has_eol && - find_group3_syncmarker(&gb, srcsize * 8) < 0) - break; - if (compr == TIFF_CCITT_RLE || g3d1 || get_bits1(&gb)) - ret = decode_group3_1d_line(avctx, &gb, avctx->width, runs, - runend); - else - ret = decode_group3_2d_line(avctx, &gb, avctx->width, runs, - runend, ref); - if (compr == TIFF_CCITT_RLE) - align_get_bits(&gb); - } - if (avctx->err_recognition & AV_EF_EXPLODE && ret < 0) - goto fail; - - if (ret < 0) { - put_line(dst, stride, avctx->width, ref); - } else { - put_line(dst, stride, avctx->width, runs); - FFSWAP(int *, runs, ref); - } - dst += stride; - } - ret = 0; -fail: - av_free(runs); - av_free(ref); - return ret; -} |