X-Git-Url: https://git.sesse.net/?p=fjl;a=blobdiff_plain;f=dehuff.c;h=5574e27184b8de5961b01f1f76cbf0e27688c89b;hp=695da0bdc78ee2d863cbb0fa547b628619ffc4ab;hb=HEAD;hpb=1cfb04470add4e31406785980e7ce14a8e9d0672 diff --git a/dehuff.c b/dehuff.c index 695da0b..5574e27 100644 --- a/dehuff.c +++ b/dehuff.c @@ -123,8 +123,6 @@ void read_huffman_tables(huffman_tables_t* dst, input_func_t* input_func, void* // Generate the AC lookup tables. for (unsigned i = 0; i < DEHUF_AC_TABLE_SIZE; ++i) { tbl->ac_table_codes[i] = AC_DEHUF_SLOW_PATH; - tbl->ac_table_length[i] = AC_DEHUF_SLOW_PATH; - tbl->ac_table_skip[i] = AC_DEHUF_SLOW_PATH; int lookup = i >> (DEHUF_AC_TABLE_BITS - DEHUF_TABLE_BITS); int rs = tbl->lookup_table_codes[lookup]; @@ -135,16 +133,16 @@ void read_huffman_tables(huffman_tables_t* dst, input_func_t* input_func, void* } if (rs == 0x00) { // End of block. - tbl->ac_table_codes[i] = AC_END_OF_BLOCK; + tbl->ac_table_codes[i] = 0; tbl->ac_table_length[i] = length; - tbl->ac_table_skip[i] = 0; + tbl->ac_table_skip[i] = 64; continue; } if (rs == 0xf0) { // 16 zero coefficients. - tbl->ac_table_codes[i] = AC_SIXTEEN_ZEROS; + tbl->ac_table_codes[i] = 0; tbl->ac_table_length[i] = length; - tbl->ac_table_skip[i] = 15; + tbl->ac_table_skip[i] = 16; continue; } @@ -159,7 +157,7 @@ void read_huffman_tables(huffman_tables_t* dst, input_func_t* input_func, void* tbl->ac_table_codes[i] = extend(bits, s); tbl->ac_table_length[i] = length + s; - tbl->ac_table_skip[i] = r; + tbl->ac_table_skip[i] = r + 1; assert(tbl->ac_table_length[i] <= DEHUF_AC_TABLE_BITS); }