From 8d68dec4b460ac292ce0021717160a8cd9fcc8dd Mon Sep 17 00:00:00 2001 From: Tor Andersson Date: Fri, 9 Jul 2010 02:47:51 +0200 Subject: Rearrange and merge some files in the fitz directory. --- fitz/filt_faxd.c | 176 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 170 insertions(+), 6 deletions(-) (limited to 'fitz/filt_faxd.c') diff --git a/fitz/filt_faxd.c b/fitz/filt_faxd.c index c31a7ea2..b53cdd29 100644 --- a/fitz/filt_faxd.c +++ b/fitz/filt_faxd.c @@ -1,8 +1,174 @@ #include "fitz.h" -#include "filt_faxd.h" +/* Fax G3/G4 decoder */ -/* common bit magic */ +/* TODO: uncompressed */ + +/* + the first 2^(initialbits) entries map bit patterns to decodes + let's say initial_bits is 8 for the sake of example + and that the code is 1001 + that means that entries 0x90 .. 0x9f have the entry { val, 4 } + because those are all the bytes that start with the code + and the 4 is the length of the code +... if (n_bits > initial_bits) ... + anyway, in that case, it basically points to a mini table + the n_bits is the maximum length of all codes beginning with that byte + so 2^(n_bits - initial_bits) is the size of the mini-table + peter came up with this, and it makes sense +*/ + +typedef struct cfd_node_s cfd_node; + +struct cfd_node_s +{ + short val; + short nbits; +}; + +enum +{ + cfd_white_initial_bits = 8, + cfd_black_initial_bits = 7, + cfd_2d_initial_bits = 7, + cfd_uncompressed_initial_bits = 6 /* must be 6 */ +}; + +/* non-run codes in tables */ +enum +{ + ERROR = -1, + ZEROS = -2, /* EOL follows, possibly with more padding first */ + UNCOMPRESSED = -3 +}; + +/* semantic codes for cf_2d_decode */ +enum +{ + P = -4, + H = -5, + VR3 = 0, + VR2 = 1, + VR1 = 2, + V0 = 3, + VL1 = 4, + VL2 = 5, + VL3 = 6 +}; + +/* White decoding table. */ +const cfd_node cf_white_decode[] = { + {256,12},{272,12},{29,8},{30,8},{45,8},{46,8},{22,7},{22,7}, + {23,7},{23,7},{47,8},{48,8},{13,6},{13,6},{13,6},{13,6},{20,7}, + {20,7},{33,8},{34,8},{35,8},{36,8},{37,8},{38,8},{19,7},{19,7}, + {31,8},{32,8},{1,6},{1,6},{1,6},{1,6},{12,6},{12,6},{12,6},{12,6}, + {53,8},{54,8},{26,7},{26,7},{39,8},{40,8},{41,8},{42,8},{43,8}, + {44,8},{21,7},{21,7},{28,7},{28,7},{61,8},{62,8},{63,8},{0,8}, + {320,8},{384,8},{10,5},{10,5},{10,5},{10,5},{10,5},{10,5},{10,5}, + {10,5},{11,5},{11,5},{11,5},{11,5},{11,5},{11,5},{11,5},{11,5}, + {27,7},{27,7},{59,8},{60,8},{288,9},{290,9},{18,7},{18,7},{24,7}, + {24,7},{49,8},{50,8},{51,8},{52,8},{25,7},{25,7},{55,8},{56,8}, + {57,8},{58,8},{192,6},{192,6},{192,6},{192,6},{1664,6},{1664,6}, + {1664,6},{1664,6},{448,8},{512,8},{292,9},{640,8},{576,8},{294,9}, + {296,9},{298,9},{300,9},{302,9},{256,7},{256,7},{2,4},{2,4},{2,4}, + {2,4},{2,4},{2,4},{2,4},{2,4},{2,4},{2,4},{2,4},{2,4},{2,4},{2,4}, + {2,4},{2,4},{3,4},{3,4},{3,4},{3,4},{3,4},{3,4},{3,4},{3,4},{3,4}, + {3,4},{3,4},{3,4},{3,4},{3,4},{3,4},{3,4},{128,5},{128,5},{128,5}, + {128,5},{128,5},{128,5},{128,5},{128,5},{8,5},{8,5},{8,5},{8,5}, + {8,5},{8,5},{8,5},{8,5},{9,5},{9,5},{9,5},{9,5},{9,5},{9,5},{9,5}, + {9,5},{16,6},{16,6},{16,6},{16,6},{17,6},{17,6},{17,6},{17,6}, + {4,4},{4,4},{4,4},{4,4},{4,4},{4,4},{4,4},{4,4},{4,4},{4,4},{4,4}, + {4,4},{4,4},{4,4},{4,4},{4,4},{5,4},{5,4},{5,4},{5,4},{5,4},{5,4}, + {5,4},{5,4},{5,4},{5,4},{5,4},{5,4},{5,4},{5,4},{5,4},{5,4}, + {14,6},{14,6},{14,6},{14,6},{15,6},{15,6},{15,6},{15,6},{64,5}, + {64,5},{64,5},{64,5},{64,5},{64,5},{64,5},{64,5},{6,4},{6,4}, + {6,4},{6,4},{6,4},{6,4},{6,4},{6,4},{6,4},{6,4},{6,4},{6,4},{6,4}, + {6,4},{6,4},{6,4},{7,4},{7,4},{7,4},{7,4},{7,4},{7,4},{7,4},{7,4}, + {7,4},{7,4},{7,4},{7,4},{7,4},{7,4},{7,4},{7,4},{-2,3},{-2,3}, + {-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0}, + {-1,0},{-1,0},{-1,0},{-1,0},{-3,4},{1792,3},{1792,3},{1984,4}, + {2048,4},{2112,4},{2176,4},{2240,4},{2304,4},{1856,3},{1856,3}, + {1920,3},{1920,3},{2368,4},{2432,4},{2496,4},{2560,4},{1472,1}, + {1536,1},{1600,1},{1728,1},{704,1},{768,1},{832,1},{896,1}, + {960,1},{1024,1},{1088,1},{1152,1},{1216,1},{1280,1},{1344,1}, + {1408,1} +}; + +/* Black decoding table. */ +const cfd_node cf_black_decode[] = { + {128,12},{160,13},{224,12},{256,12},{10,7},{11,7},{288,12},{12,7}, + {9,6},{9,6},{8,6},{8,6},{7,5},{7,5},{7,5},{7,5},{6,4},{6,4},{6,4}, + {6,4},{6,4},{6,4},{6,4},{6,4},{5,4},{5,4},{5,4},{5,4},{5,4},{5,4}, + {5,4},{5,4},{1,3},{1,3},{1,3},{1,3},{1,3},{1,3},{1,3},{1,3},{1,3}, + {1,3},{1,3},{1,3},{1,3},{1,3},{1,3},{1,3},{4,3},{4,3},{4,3},{4,3}, + {4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3}, + {4,3},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2}, + {3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2}, + {3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2},{3,2}, + {2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2}, + {2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2}, + {2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2},{2,2}, + {-2,4},{-2,4},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0}, + {-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-3,5},{1792,4}, + {1792,4},{1984,5},{2048,5},{2112,5},{2176,5},{2240,5},{2304,5}, + {1856,4},{1856,4},{1920,4},{1920,4},{2368,5},{2432,5},{2496,5}, + {2560,5},{18,3},{18,3},{18,3},{18,3},{18,3},{18,3},{18,3},{18,3}, + {52,5},{52,5},{640,6},{704,6},{768,6},{832,6},{55,5},{55,5}, + {56,5},{56,5},{1280,6},{1344,6},{1408,6},{1472,6},{59,5},{59,5}, + {60,5},{60,5},{1536,6},{1600,6},{24,4},{24,4},{24,4},{24,4}, + {25,4},{25,4},{25,4},{25,4},{1664,6},{1728,6},{320,5},{320,5}, + {384,5},{384,5},{448,5},{448,5},{512,6},{576,6},{53,5},{53,5}, + {54,5},{54,5},{896,6},{960,6},{1024,6},{1088,6},{1152,6},{1216,6}, + {64,3},{64,3},{64,3},{64,3},{64,3},{64,3},{64,3},{64,3},{13,1}, + {13,1},{13,1},{13,1},{13,1},{13,1},{13,1},{13,1},{13,1},{13,1}, + {13,1},{13,1},{13,1},{13,1},{13,1},{13,1},{23,4},{23,4},{50,5}, + {51,5},{44,5},{45,5},{46,5},{47,5},{57,5},{58,5},{61,5},{256,5}, + {16,3},{16,3},{16,3},{16,3},{17,3},{17,3},{17,3},{17,3},{48,5}, + {49,5},{62,5},{63,5},{30,5},{31,5},{32,5},{33,5},{40,5},{41,5}, + {22,4},{22,4},{14,1},{14,1},{14,1},{14,1},{14,1},{14,1},{14,1}, + {14,1},{14,1},{14,1},{14,1},{14,1},{14,1},{14,1},{14,1},{14,1}, + {15,2},{15,2},{15,2},{15,2},{15,2},{15,2},{15,2},{15,2},{128,5}, + {192,5},{26,5},{27,5},{28,5},{29,5},{19,4},{19,4},{20,4},{20,4}, + {34,5},{35,5},{36,5},{37,5},{38,5},{39,5},{21,4},{21,4},{42,5}, + {43,5},{0,3},{0,3},{0,3},{0,3} +}; + +/* 2-D decoding table. */ +const cfd_node cf_2d_decode[] = { + {128,11},{144,10},{6,7},{0,7},{5,6},{5,6},{1,6},{1,6},{-4,4}, + {-4,4},{-4,4},{-4,4},{-4,4},{-4,4},{-4,4},{-4,4},{-5,3},{-5,3}, + {-5,3},{-5,3},{-5,3},{-5,3},{-5,3},{-5,3},{-5,3},{-5,3},{-5,3}, + {-5,3},{-5,3},{-5,3},{-5,3},{-5,3},{4,3},{4,3},{4,3},{4,3},{4,3}, + {4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3},{4,3}, + {2,3},{2,3},{2,3},{2,3},{2,3},{2,3},{2,3},{2,3},{2,3},{2,3},{2,3}, + {2,3},{2,3},{2,3},{2,3},{2,3},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1}, + {3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1}, + {3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1}, + {3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1}, + {3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1}, + {3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1},{3,1}, + {3,1},{3,1},{3,1},{-2,4},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0}, + {-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0}, + {-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-1,0},{-3,3} +}; + +/* Uncompresssed decoding table. */ +const cfd_node cf_uncompressed_decode[] = { + {64,12},{5,6},{4,5},{4,5},{3,4},{3,4},{3,4},{3,4},{2,3},{2,3}, + {2,3},{2,3},{2,3},{2,3},{2,3},{2,3},{1,2},{1,2},{1,2},{1,2},{1,2}, + {1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2}, + {0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1}, + {0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1}, + {0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1},{0,1}, + {-1,0},{-1,0},{8,6},{9,6},{6,5},{6,5},{7,5},{7,5},{4,4},{4,4}, + {4,4},{4,4},{5,4},{5,4},{5,4},{5,4},{2,3},{2,3},{2,3},{2,3},{2,3}, + {2,3},{2,3},{2,3},{3,3},{3,3},{3,3},{3,3},{3,3},{3,3},{3,3},{3,3}, + {0,2},{0,2},{0,2},{0,2},{0,2},{0,2},{0,2},{0,2},{0,2},{0,2},{0,2}, + {0,2},{0,2},{0,2},{0,2},{0,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2}, + {1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2},{1,2} +}; + +/* bit magic */ static inline void printbits(FILE *f, int code, int nbits) @@ -127,6 +293,8 @@ setbits(unsigned char *line, int x0, int x1) } } +typedef struct fz_faxd_s fz_faxd; + typedef enum fax_stage_e { SNORMAL, /* neutral state, waiting for any code */ @@ -135,10 +303,6 @@ typedef enum fax_stage_e SH1, SH2 /* in H part 1 and 2 (both makeup and terminating codes) */ } fax_stage_e; -/* TODO: uncompressed */ - -typedef struct fz_faxd_s fz_faxd; - struct fz_faxd_s { fz_filter super; -- cgit v1.2.3