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SAD values in MACROBLOCK have to be signed integer
#ifndef _GLOBAL_H_ #define _GLOBAL_H_ #include "xvid.h" #include "portab.h" /* --- macroblock modes --- */ #define MODE_INTER 0 #define MODE_INTER_Q 1 #define MODE_INTER4V 2 #define MODE_INTRA 3 #define MODE_INTRA_Q 4 #define MODE_STUFFING 7 #define MODE_NOT_CODED 16 /* --- bframe specific --- */ #define MODE_DIRECT 0 #define MODE_INTERPOLATE 1 #define MODE_BACKWARD 2 #define MODE_FORWARD 3 #define MODE_DIRECT_NONE_MV 4 typedef struct { uint32_t bufa; uint32_t bufb; uint32_t buf; uint32_t pos; uint32_t *tail; uint32_t *start; uint32_t length; } Bitstream; #define MBPRED_SIZE 15 typedef struct { // decoder/encoder VECTOR mvs[4]; int32_t sad8[4]; // (signed!) SAD values for inter4v-VECTORs int32_t sad16; // (signed!) SAD value for inter-VECTOR short int pred_values[6][MBPRED_SIZE]; int acpred_directions[6]; int mode; int quant; // absolute quant int field_dct; int field_pred; int field_for_top; int field_for_bot; // encoder specific VECTOR pmvs[4]; int dquant; int cbp; // bframe stuff VECTOR b_mvs[4]; VECTOR b_pmvs[4]; int mb_type; int dbquant; } MACROBLOCK; static __inline int8_t get_dc_scaler(uint32_t quant, uint32_t lum) { if(quant < 5) return 8; if(quant < 25 && !lum) return (quant + 13) / 2; if(quant < 9) return 2 * quant; if(quant < 25) return quant + 8; if(lum) return 2 * quant - 16; else return quant - 6; } // useful macros #define MIN(X, Y) ((X)<(Y)?(X):(Y)) #define MAX(X, Y) ((X)>(Y)?(X):(Y)) #define ABS(X) (((X)>0)?(X):-(X)) #define SIGN(X) (((X)>0)?1:-1) #endif /* _GLOBAL_H_ */
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