h264: correct implicit weight table computation for long ref pics
Correct computation of implicit weight tables when referencing pictures that are marked for long reference. Signed-off-by: Diego Biurrun <diego@biurrun.de>
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@ -2157,15 +2157,17 @@ static void implicit_weight_table(H264Context *h, int field){
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for(ref0=ref_start; ref0 < ref_count0; ref0++){
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int poc0 = h->ref_list[0][ref0].poc;
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for(ref1=ref_start; ref1 < ref_count1; ref1++){
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int poc1 = h->ref_list[1][ref1].poc;
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int td = av_clip(poc1 - poc0, -128, 127);
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int w= 32;
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if(td){
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int tb = av_clip(cur_poc - poc0, -128, 127);
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int tx = (16384 + (FFABS(td) >> 1)) / td;
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int dist_scale_factor = (tb*tx + 32) >> 8;
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if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
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w = 64 - dist_scale_factor;
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int w = 32;
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if (!h->ref_list[0][ref0].long_ref && !h->ref_list[1][ref1].long_ref) {
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int poc1 = h->ref_list[1][ref1].poc;
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int td = av_clip(poc1 - poc0, -128, 127);
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if(td){
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int tb = av_clip(cur_poc - poc0, -128, 127);
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int tx = (16384 + (FFABS(td) >> 1)) / td;
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int dist_scale_factor = (tb*tx + 32) >> 8;
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if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
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w = 64 - dist_scale_factor;
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}
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}
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if(field<0){
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h->implicit_weight[ref0][ref1][0]=
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