/******************************************************************* DCT coefficient table 'B-15' module *******************************************************************/ #define B15_C #include "b15.h" int read_dct_coefficient_b15(VIDEO_STREAM *in, int *run, int *level); static int eob(VIDEO_STREAM *in, int *run, int *level); static int esc(VIDEO_STREAM *in, int *run, int *level); static int l8b(VIDEO_STREAM *in, int *run, int *level); static int o8b(VIDEO_STREAM *in, int *run, int *level); int read_dct_coefficient_b15(VIDEO_STREAM *in, int *run, int *level) { int code; static const rdc table[] = { o8b, esc, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, eob, eob, eob, eob, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, l8b, }; code = read_bits(in, 6); return table[code](in, run, level); } static int eob(VIDEO_STREAM *in, int *run, int *level) { erase_bits(in, 4); *run = -1; *level = 0; return 0; } static int esc(VIDEO_STREAM *in, int *run, int *level) { erase_bits(in, 6); read_fixed_length_dct_coefficient(in, run, level); return 1; } static int l8b(VIDEO_STREAM *in, int *run, int *level) { int code; #if 0 static const int sign[] = { 1, -1, }; #endif static const DCT_COEFFICIENT_VLC_ELEMENT table[] = { {7,1,7},{7,1,7},{8,1,7},{8,1,7},{6,1,7},{6,1,7},{2,2,7},{2,2,7}, {0,7,6},{0,7,6},{0,7,6},{0,7,6},{0,6,6},{0,6,6},{0,6,6},{0,6,6}, {4,1,6},{4,1,6},{4,1,6},{4,1,6},{5,1,6},{5,1,6},{5,1,6},{5,1,6}, {1,5,8},{11,1,8},{0,11,8},{0,10,8},{13,1,8},{12,1,8},{3,2,8},{1,4,8}, {2,1,5},{2,1,5},{2,1,5},{2,1,5},{2,1,5},{2,1,5},{2,1,5},{2,1,5}, {1,2,5},{1,2,5},{1,2,5},{1,2,5},{1,2,5},{1,2,5},{1,2,5},{1,2,5}, {3,1,5},{3,1,5},{3,1,5},{3,1,5},{3,1,5},{3,1,5},{3,1,5},{3,1,5}, {1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3}, {1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3}, {1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3}, {1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3},{1,1,3}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}, {0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4}, {0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4},{0,3,4}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2},{0,1,2}, {0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3}, {0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3}, {0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3}, {0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3},{0,2,3}, {0,4,5},{0,4,5},{0,4,5},{0,4,5},{0,4,5},{0,4,5},{0,4,5},{0,4,5}, {0,5,5},{0,5,5},{0,5,5},{0,5,5},{0,5,5},{0,5,5},{0,5,5},{0,5,5}, {9,1,7},{9,1,7},{1,3,7},{1,3,7},{10,1,7},{10,1,7},{0,8,7},{0,8,7}, {0,9,7},{0,9,7},{0,12,8},{0,13,8},{2,3,8},{4,2,8},{0,14,8},{0,15,8}, }; code = read_bits(in, 8); code -= 8; *run = table[code].run; *level = table[code].level; erase_bits(in, table[code].length); if(get_bits(in, 1)){ *level = 0 - *level; } #if 0 code = get_bits(in, 1); *level *= sign[code]; #endif return 1; } static int o8b(VIDEO_STREAM *in, int *run, int *level) { int code; #if 0 static const int sign[] = { 1, -1, }; #endif 0 static const DCT_COEFFICIENT_VLC_ELEMENT table[] = { {1,18,16},{1,17,16},{1,16,16},{1,15,16},{6,3,16},{16,2,16},{15,2,16},{14,2,16}, {13,2,16},{12,2,16},{11,2,16},{31,1,16},{30,1,16},{29,1,16},{28,1,16},{27,1,16}, {0,40,15},{0,40,15},{0,39,15},{0,39,15},{0,38,15},{0,38,15},{0,37,15},{0,37,15}, {0,36,15},{0,36,15},{0,35,15},{0,35,15},{0,34,15},{0,34,15},{0,33,15},{0,33,15}, {0,32,15},{0,32,15},{1,14,15},{1,14,15},{1,13,15},{1,13,15},{1,12,15},{1,12,15}, {1,11,15},{1,11,15},{1,10,15},{1,10,15},{1,9,15},{1,9,15},{1,8,15},{1,8,15}, {0,31,14},{0,31,14},{0,31,14},{0,31,14},{0,30,14},{0,30,14},{0,30,14},{0,30,14}, {0,29,14},{0,29,14},{0,29,14},{0,29,14},{0,28,14},{0,28,14},{0,28,14},{0,28,14}, {0,27,14},{0,27,14},{0,27,14},{0,27,14},{0,26,14},{0,26,14},{0,26,14},{0,26,14}, {0,25,14},{0,25,14},{0,25,14},{0,25,14},{0,24,14},{0,24,14},{0,24,14},{0,24,14}, {0,23,14},{0,23,14},{0,23,14},{0,23,14},{0,22,14},{0,22,14},{0,22,14},{0,22,14}, {0,21,14},{0,21,14},{0,21,14},{0,21,14},{0,20,14},{0,20,14},{0,20,14},{0,20,14}, {0,19,14},{0,19,14},{0,19,14},{0,19,14},{0,18,14},{0,18,14},{0,18,14},{0,18,14}, {0,17,14},{0,17,14},{0,17,14},{0,17,14},{0,16,14},{0,16,14},{0,16,14},{0,16,14}, {10,2,13},{10,2,13},{10,2,13},{10,2,13},{10,2,13},{10,2,13},{10,2,13},{10,2,13}, {9,2,13},{9,2,13},{9,2,13},{9,2,13},{9,2,13},{9,2,13},{9,2,13},{9,2,13}, {5,3,13},{5,3,13},{5,3,13},{5,3,13},{5,3,13},{5,3,13},{5,3,13},{5,3,13}, {3,4,13},{3,4,13},{3,4,13},{3,4,13},{3,4,13},{3,4,13},{3,4,13},{3,4,13}, {2,5,13},{2,5,13},{2,5,13},{2,5,13},{2,5,13},{2,5,13},{2,5,13},{2,5,13}, {1,7,13},{1,7,13},{1,7,13},{1,7,13},{1,7,13},{1,7,13},{1,7,13},{1,7,13}, {1,6,13},{1,6,13},{1,6,13},{1,6,13},{1,6,13},{1,6,13},{1,6,13},{1,6,13}, {0,15,13},{0,15,13},{0,15,13},{0,15,13},{0,15,13},{0,15,13},{0,15,13},{0,15,13}, {0,14,13},{0,14,13},{0,14,13},{0,14,13},{0,14,13},{0,14,13},{0,14,13},{0,14,13}, {0,13,13},{0,13,13},{0,13,13},{0,13,13},{0,13,13},{0,13,13},{0,13,13},{0,13,13}, {0,12,13},{0,12,13},{0,12,13},{0,12,13},{0,12,13},{0,12,13},{0,12,13},{0,12,13}, {26,1,13},{26,1,13},{26,1,13},{26,1,13},{26,1,13},{26,1,13},{26,1,13},{26,1,13}, {25,1,13},{25,1,13},{25,1,13},{25,1,13},{25,1,13},{25,1,13},{25,1,13},{25,1,13}, {24,1,13},{24,1,13},{24,1,13},{24,1,13},{24,1,13},{24,1,13},{24,1,13},{24,1,13}, {23,1,13},{23,1,13},{23,1,13},{23,1,13},{23,1,13},{23,1,13},{23,1,13},{23,1,13}, {22,1,13},{22,1,13},{22,1,13},{22,1,13},{22,1,13},{22,1,13},{22,1,13},{22,1,13}, {0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12}, {0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12},{0,11,12}, {8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12}, {8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12},{8,2,12}, {4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12}, {4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12},{4,3,12}, {0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12}, {0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12},{0,10,12}, {2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12}, {2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12},{2,4,12}, {7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12}, {7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12},{7,2,12}, {21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12}, {21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12},{21,1,12}, {20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12}, {20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12},{20,1,12}, {0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12}, {0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12},{0,9,12}, {19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12}, {19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12},{19,1,12}, {18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12}, {18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12},{18,1,12}, {1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12}, {1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12},{1,5,12}, {3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12}, {3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12},{3,3,12}, {0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12}, {0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12},{0,8,12}, {6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12}, {6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12},{6,2,12}, {17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12}, {17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12},{17,1,12}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9},{5,2,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9},{14,1,9}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10},{2,4,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10},{16,1,10}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, {15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9},{15,1,9}, }; code = read_bits(in, 16); code -= 16; *run = table[code].run; *level = table[code].level; erase_bits(in, table[code].length); if(get_bits(in, 1)){ *level = 0 - *level; } #if 0 code = get_bits(in, 1); *level *= sign[code]; #endif return 1; }