consume_markers finish_input_pass initial_setup jinit_input_controller JPEG_INTERNALS latch_quant_tables METHODDEF my_inputctl_ptr per_scan_setup reset_input_controller start_input_pass

latch_quant_tables ( j_decompress_ptr  cinfo ) Definition at line 487 of file jdinput.c. Referenced by start_input_pass(). { int ci, qtblno; jpeg_component_info *compptr; JQUANT_TBL * qtbl; for (ci = 0; ci < cinfo->comps_in_scan; ci++) { compptr = cinfo->cur_comp_info[ci]; /* No work if we already saved Q-table for this component */ if (compptr->quant_table != NULL) continue; /* Make sure specified quantization table is present */ qtblno = compptr->quant_tbl_no; if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS || cinfo->quant_tbl_ptrs[qtblno] == NULL) ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno); /* OK, save away the quantization table */ qtbl = (JQUANT_TBL *) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, SIZEOF(JQUANT_TBL)); MEMCOPY(qtbl, cinfo->quant_tbl_ptrs[qtblno], SIZEOF(JQUANT_TBL)); compptr->quant_table = qtbl; } }