32 #define CCITT_SYMS 104
35 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
36 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
37 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
38 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,
39 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
40 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896,
41 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728,
42 1792, 1856, 1920, 1984, 2048, 2112, 2176, 2240, 2304, 2368, 2432, 2496, 2560
48 0x35, 0x07, 0x07, 0x08, 0x0B, 0x0C, 0x0E, 0x0F, 0x13, 0x14, 0x07, 0x08, 0x08,
49 0x03, 0x34, 0x35, 0x2A, 0x2B, 0x27, 0x0C, 0x08, 0x17, 0x03, 0x04, 0x28, 0x2B,
50 0x13, 0x24, 0x18, 0x02, 0x03, 0x1A, 0x1B, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
51 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x04, 0x05, 0x0A, 0x0B, 0x52, 0x53, 0x54,
52 0x55, 0x24, 0x25, 0x58, 0x59, 0x5A, 0x5B, 0x4A, 0x4B, 0x32, 0x33, 0x34, 0x1B,
53 0x12, 0x17, 0x37, 0x36, 0x37, 0x64, 0x65, 0x68, 0x67, 0xCC, 0xCD, 0xD2, 0xD3,
54 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0x98, 0x99, 0x9A, 0x18, 0x9B,
55 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F
58 0x37, 0x02, 0x03, 0x02, 0x03, 0x03, 0x02, 0x03, 0x05, 0x04, 0x04, 0x05, 0x07,
59 0x04, 0x07, 0x18, 0x17, 0x18, 0x08, 0x67, 0x68, 0x6C, 0x37, 0x28, 0x17, 0x18,
60 0xCA, 0xCB, 0xCC, 0xCD, 0x68, 0x69, 0x6A, 0x6B, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
61 0xD7, 0x6C, 0x6D, 0xDA, 0xDB, 0x54, 0x55, 0x56, 0x57, 0x64, 0x65, 0x52, 0x53,
62 0x24, 0x37, 0x38, 0x27, 0x28, 0x58, 0x59, 0x2B, 0x2C, 0x5A, 0x66, 0x67, 0x0F,
63 0xC8, 0xC9, 0x5B, 0x33, 0x34, 0x35, 0x6C, 0x6D, 0x4A, 0x4B, 0x4C, 0x4D, 0x72,
64 0x73, 0x74, 0x75, 0x76, 0x77, 0x52, 0x53, 0x54, 0x55, 0x5A, 0x5B, 0x64, 0x65,
65 0x08, 0x0C, 0x0D, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x1C, 0x1D, 0x1E, 0x1F
72 8, 6, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7,
73 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
74 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
75 8, 8, 8, 8, 5, 5, 6, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9,
76 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 9, 11, 11, 11, 12, 12, 12, 12, 12, 12,
80 10, 3, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 7, 8, 8, 9, 10, 10, 10, 11,
81 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
82 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
83 12, 12, 12, 12, 10, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13,
84 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 12, 12, 12, 12, 12, 12,
90 1, 1, 2, 2, 2, 1, 3, 3, 3, 1, 1
94 4, 3, 7, 6, 3, 1, 3, 6, 7, 7, 9
101 static VLC_TYPE code_table1[528][2];
102 static VLC_TYPE code_table2[648][2];
104 static int initialized = 0;
108 ccitt_vlc[0].
table = code_table1;
110 ccitt_vlc[1].
table = code_table2;
112 for (i = 0; i < 2; i++) {
127 unsigned int pix_left,
int *runs,
131 unsigned int run = 0;
134 t =
get_vlc2(gb, ccitt_vlc[mode].table, 9, 2);
138 if (runs >= runend) {
142 if (pix_left <= run) {
151 }
else if ((
int)t == -1) {
161 unsigned int width,
int *runs,
162 const int *runend,
const int *ref)
164 int mode = 0, saved_run = 0,
t;
165 int run_off = *ref++;
166 unsigned int offs = 0,
run = 0;
170 while (offs < width) {
178 run = run_off - offs;
186 }
else if (cmode == 1) {
188 for (k = 0; k < 2; k++) {
191 t =
get_vlc2(gb, ccitt_vlc[mode].table, 9, 2);
200 *runs++ =
run + saved_run;
201 if (runs >= runend) {
207 if (offs > width ||
run > width) {
213 }
else if (cmode == 9 || cmode == 10) {
217 run = run_off - offs + (cmode - 5);
220 if (offs > width ||
run > width) {
224 *runs++ =
run + saved_run;
225 if (runs >= runend) {
233 while (run_off <= offs) {
246 int run, mode = ~0, pix_left =
width, run_idx = 0;
249 while (pix_left > 0) {
250 run = runs[run_idx++];
253 for (; run > 16; run -= 16)
263 unsigned int state = -1;
265 while (srcsize-- > 0) {
267 if ((state & 0xFFF) == 1)
279 int *runs, *ref =
NULL, *runend;
281 int runsize = avctx->
width + 2;
283 runs =
av_malloc(runsize *
sizeof(runs[0]));
284 ref =
av_malloc(runsize *
sizeof(ref[0]));
289 ref[0] = avctx->
width;
293 for (j = 0; j <
height; j++) {
294 runend = runs + runsize;
301 int g3d1 = (compr ==
TIFF_G3) && !(opts & 1);
static int find_group3_syncmarker(GetBitContext *gb, int srcsize)
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int decode_group3_1d_line(AVCodecContext *avctx, GetBitContext *gb, unsigned int pix_left, int *runs, const int *runend)
static void put_sbits(PutBitContext *pb, int n, int32_t value)
static void put_line(uint8_t *dst, int size, int width, const int *runs)
static int decode_group3_2d_line(AVCodecContext *avctx, GetBitContext *gb, unsigned int width, int *runs, const int *runend, const int *ref)
static const uint8_t ccitt_group3_2d_bits[11]
av_cold void ff_ccitt_unpack_init(void)
initialize upacker code
int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
static const uint16_t ccitt_syms[CCITT_SYMS]
static const uint8_t ccitt_codes_bits[2][CCITT_SYMS]
void av_log(void *avcl, int level, const char *fmt,...)
int ff_ccitt_unpack(AVCodecContext *avctx, const uint8_t *src, int srcsize, uint8_t *dst, int height, int stride, enum TiffCompr compr, int opts)
unpack data compressed with CCITT Group 3 1/2-D or Group 4 method
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
int width
picture width / height.
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
#define INIT_VLC_USE_NEW_STATIC
static VLC ccitt_group3_2d_vlc
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
TiffCompr
list of TIFF compression types
Libavcodec external API header.
main external API structure.
static unsigned int get_bits1(GetBitContext *s)
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static const uint8_t ccitt_group3_2d_lens[11]
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static const uint8_t ccitt_codes_lens[2][CCITT_SYMS]
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
VLC_TYPE(* table)[2]
code, bits
static const uint8_t * align_get_bits(GetBitContext *s)
#define FFSWAP(type, a, b)
CCITT Fax Group 3 and 4 decompression.