mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
456 lines
16 KiB
C
456 lines
16 KiB
C
/*
|
|
* 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 "libavutil/mem.h"
|
|
#include "libavutil/thread.h"
|
|
#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
|
|
};
|
|
|
|
// Also contains the other VLC tables pointed to by ccitt_vlc
|
|
static VLCElem ccitt_group3_2d_vlc[512 + 528 + 648];
|
|
static const VLCElem *ccitt_vlc[2];
|
|
|
|
static av_cold void ccitt_unpack_init(void)
|
|
{
|
|
VLCInitState state = VLC_INIT_STATE(ccitt_group3_2d_vlc);
|
|
int i;
|
|
|
|
ff_vlc_init_tables(&state, 9, 11,
|
|
ccitt_group3_2d_lens, 1, 1,
|
|
ccitt_group3_2d_bits, 1, 1, 0);
|
|
for (i = 0; i < 2; i++) {
|
|
ccitt_vlc[i] = ff_vlc_init_tables_sparse(&state, 9, CCITT_SYMS,
|
|
ccitt_codes_lens[i], 1, 1,
|
|
ccitt_codes_bits[i], 1, 1,
|
|
ccitt_syms, 2, 2, 0);
|
|
}
|
|
}
|
|
|
|
av_cold void ff_ccitt_unpack_init(void)
|
|
{
|
|
static AVOnce init_static_once = AV_ONCE_INIT;
|
|
ff_thread_once(&init_static_once, ccitt_unpack_init);
|
|
}
|
|
|
|
static int decode_uncompressed(AVCodecContext *avctx, GetBitContext *gb,
|
|
unsigned int *pix_left, int **runs,
|
|
const int *runend, int *mode)
|
|
{
|
|
int eob = 0;
|
|
int newmode;
|
|
int saved_run = 0;
|
|
|
|
do {
|
|
int cwi, k;
|
|
int cw = 0;
|
|
int codes[2];
|
|
do {
|
|
cwi = show_bits(gb, 11);
|
|
if (!cwi) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid uncompressed codeword\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
cwi = 10 - av_log2(cwi);
|
|
if (get_bits_left(gb) < cwi + 1)
|
|
return AVERROR_INVALIDDATA;
|
|
skip_bits(gb, cwi + 1);
|
|
if (cwi > 5) {
|
|
newmode = get_bits1(gb);
|
|
eob = 1;
|
|
cwi -= 6;
|
|
}
|
|
cw += cwi;
|
|
} while(cwi == 5);
|
|
|
|
codes[0] = cw;
|
|
codes[1] = !eob;
|
|
|
|
for (k = 0; k < 2; k++) {
|
|
if (codes[k]) {
|
|
if (*mode == !k) {
|
|
*(*runs)++ = saved_run;
|
|
if (*runs >= runend) {
|
|
av_log(avctx, AV_LOG_ERROR, "uncompressed run overrun\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (*pix_left <= saved_run) {
|
|
av_log(avctx, AV_LOG_ERROR, "uncompressed run went out of bounds\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
*pix_left -= saved_run;
|
|
saved_run = 0;
|
|
*mode = !*mode;
|
|
}
|
|
saved_run += codes[k];
|
|
}
|
|
}
|
|
} while (!eob);
|
|
*(*runs)++ = saved_run;
|
|
if (*runs >= runend) {
|
|
av_log(avctx, AV_LOG_ERROR, "uncompressed run overrun\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (*pix_left <= saved_run) {
|
|
if (*pix_left == saved_run)
|
|
return 1;
|
|
av_log(avctx, AV_LOG_ERROR, "uncompressed run went out of boundsE\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
*pix_left -= saved_run;
|
|
saved_run = 0;
|
|
*mode = !*mode;
|
|
if (newmode != *mode) { //FIXME CHECK
|
|
*(*runs)++ = 0;
|
|
if (*runs >= runend) {
|
|
av_log(avctx, AV_LOG_ERROR, "uncompressed run overrun\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
*mode = newmode;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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 (;;) {
|
|
if (get_bits_left(gb) <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
t = get_vlc2(gb, ccitt_vlc[mode], 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) {
|
|
if (get_bits_left(gb) > 12 && show_bits(gb, 12) == 15) {
|
|
int ret;
|
|
skip_bits(gb, 12);
|
|
ret = decode_uncompressed(avctx, gb, &pix_left, &runs, runend, &mode);
|
|
if (ret < 0) {
|
|
return ret;
|
|
} else if (ret)
|
|
break;
|
|
} else {
|
|
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;
|
|
if (get_bits_left(gb) <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
cmode = get_vlc2(gb, ccitt_group3_2d_vlc, 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 (;;) {
|
|
if (get_bits_left(gb) <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
t = get_vlc2(gb, ccitt_vlc[mode], 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) {
|
|
int xxx;
|
|
if (get_bits_left(gb) < 3)
|
|
return AVERROR_INVALIDDATA;
|
|
xxx = get_bits(gb, 3);
|
|
if (cmode == 9 && xxx == 7) {
|
|
int ret;
|
|
int pix_left = width - offs;
|
|
|
|
if (saved_run) {
|
|
av_log(avctx, AV_LOG_ERROR, "saved run %d on entering uncompressed mode\n", saved_run);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
ret = decode_uncompressed(avctx, gb, &pix_left, &runs, runend, &mode);
|
|
offs = width - pix_left;
|
|
if (ret < 0) {
|
|
return ret;
|
|
} else if (ret)
|
|
break;
|
|
} else {
|
|
avpriv_report_missing_feature(avctx, "Special mode %d xxx=%d support", cmode, xxx);
|
|
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);
|
|
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_array(runsize, sizeof(runs[0]));
|
|
ref = av_malloc_array(runsize, sizeof(ref[0]));
|
|
if (!runs || !ref) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
ref[0] = avctx->width;
|
|
ref[1] = 0;
|
|
ref[2] = 0;
|
|
if ((ret = init_get_bits8(&gb, src, srcsize)) < 0)
|
|
goto fail;
|
|
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;
|
|
}
|