mirror of https://git.ffmpeg.org/ffmpeg.git
optimizing unpack_coeffs()
Originally committed as revision 4127 to svn://svn.ffmpeg.org/ffmpeg/trunk
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86e59cc01d
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3c096ac791
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@ -1817,10 +1817,21 @@ static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, i
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int context= av_log2(/*ABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
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v=get_rac(&s->c, &b->state[0][context]);
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if(v){
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v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
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v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l&0xFF] + 3*quant3bA[t&0xFF]]);
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b->x_coeff[index].x=x;
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b->x_coeff[index++].coeff= v;
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}
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}else{
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if(!run){
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run= get_symbol2(&s->c, b->state[1], 3);
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v=1;
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v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
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v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]);
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b->x_coeff[index].x=x;
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b->x_coeff[index++].coeff= v;
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}else{
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run--;
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v=0;
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@ -1835,14 +1846,6 @@ static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, i
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}
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}
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}
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if(v){
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int context= av_log2(/*ABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
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v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
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v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l&0xFF] + 3*quant3bA[t&0xFF]]);
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b->x_coeff[index].x=x;
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b->x_coeff[index++].coeff= v;
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}
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}
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b->x_coeff[index++].x= w+1; //end marker
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prev_index= prev2_index;
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