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#ifndef _GLOBAL_H_ |
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#define _GLOBAL_H_ |
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|
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#include "portab.h" |
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|
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/* --- macroblock stuff --- */ |
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|
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#define MODE_INTER 0 |
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#define MODE_INTER_Q 1 |
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#define MODE_INTER4V 2 |
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#define MODE_INTRA 3 |
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#define MODE_INTRA_Q 4 |
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#define MODE_STUFFING 7 |
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#define MODE_NOT_CODED 16 |
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|
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typedef struct |
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{ |
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int x; |
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int y; |
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} VECTOR; |
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|
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|
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#define MBPRED_SIZE 15 |
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|
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|
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typedef struct |
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{ |
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// decoder/encoder |
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VECTOR mvs[4]; |
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uint32_t sad8[4]; // SAD values for inter4v-VECTORs |
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uint32_t sad16; // SAD value for inter-VECTOR |
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|
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short int pred_values[6][MBPRED_SIZE]; |
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int acpred_directions[6]; |
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|
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int mode; |
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int quant; // absolute quant |
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|
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int field_dct; |
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int field_pred; |
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int field_for_top; |
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int field_for_bot; |
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|
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// encoder specific |
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|
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VECTOR pmvs[4]; |
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int dquant; |
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int cbp; |
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|
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} MACROBLOCK; |
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|
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static __inline int8_t get_dc_scaler(int32_t quant, uint32_t lum) |
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{ |
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int8_t dc_scaler; |
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|
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if(quant > 0 && quant < 5) { |
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dc_scaler = 8; |
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return dc_scaler; |
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} |
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|
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if(quant < 25 && !lum) { |
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dc_scaler = (quant + 13) >> 1; |
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return dc_scaler; |
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} |
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|
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if(quant < 9) { |
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dc_scaler = quant << 1; |
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return dc_scaler; |
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} |
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|
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if(quant < 25) { |
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dc_scaler = quant + 8; |
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return dc_scaler; |
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} |
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|
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if(lum) |
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dc_scaler = (quant << 1) - 16; |
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else |
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dc_scaler = quant - 6; |
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|
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return dc_scaler; |
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} |
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|
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#endif /* _GLOBAL_H_ */ |
