diff options
Diffstat (limited to 'thirdparty/libtheora/enquant.h')
-rw-r--r-- | thirdparty/libtheora/enquant.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/thirdparty/libtheora/enquant.h b/thirdparty/libtheora/enquant.h new file mode 100644 index 0000000000..d62df10d1a --- /dev/null +++ b/thirdparty/libtheora/enquant.h @@ -0,0 +1,27 @@ +#if !defined(_enquant_H) +# define _enquant_H (1) +# include "quant.h" + +typedef struct oc_iquant oc_iquant; + +#define OC_QUANT_MAX_LOG (OC_Q57(OC_STATIC_ILOG_32(OC_QUANT_MAX)-1)) + +/*Used to compute x/d via ((x*m>>16)+x>>l)+(x<0)) + (i.e., one 16x16->16 mul, 2 shifts, and 2 adds). + This is not an approximation; for 16-bit x and d, it is exact.*/ +struct oc_iquant{ + ogg_int16_t m; + ogg_int16_t l; +}; + +typedef oc_iquant oc_iquant_table[64]; + + + +void oc_quant_params_pack(oggpack_buffer *_opb,const th_quant_info *_qinfo); +void oc_enquant_tables_init(ogg_uint16_t *_dequant[64][3][2], + oc_iquant *_enquant[64][3][2],const th_quant_info *_qinfo); +void oc_enquant_qavg_init(ogg_int64_t _log_qavg[2][64], + ogg_uint16_t *_dequant[64][3][2],int _pixel_fmt); + +#endif |