1 #if !defined(_enquant_H) 2 # define _enquant_H (1) 3 # include "quant.h" 4 5 typedef struct oc_iquant oc_iquant; 6 7 #define OC_QUANT_MAX_LOG (OC_Q57(OC_STATIC_ILOG_32(OC_QUANT_MAX)-1)) 8 9 /*Used to compute x/d via ((x*m>>16)+x>>l)+(x<0)) 10 (i.e., one 16x16->16 mul, 2 shifts, and 2 adds). 11 This is not an approximation; for 16-bit x and d, it is exact.*/ 12 struct oc_iquant{ 13 ogg_int16_t m; 14 ogg_int16_t l; 15 }; 16 17 typedef oc_iquant oc_iquant_table[64]; 18 19 20 21 void oc_quant_params_pack(oggpack_buffer *_opb,const th_quant_info *_qinfo); 22 void oc_enquant_tables_init(ogg_uint16_t *_dequant[64][3][2], 23 oc_iquant *_enquant[64][3][2],const th_quant_info *_qinfo); 24 void oc_enquant_qavg_init(ogg_int64_t _log_qavg[2][64], 25 ogg_uint16_t *_dequant[64][3][2],int _pixel_fmt); 26 27 #endif 28