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Originally committed as revision 16296 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2008-12-23 19:12:50 +00:00
parent d42fc4a8ca
commit 2f2893ce9b
1 changed files with 21 additions and 21 deletions
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42
libavcodec/h264.c
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@@ -4153,29 +4153,29 @@ static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, in
if(prefix == LEVEL_TAB_BITS) if(prefix == LEVEL_TAB_BITS)
prefix += get_level_prefix(gb); prefix += get_level_prefix(gb);
//first coefficient has suffix_length equal to 0 or 1 //first coefficient has suffix_length equal to 0 or 1
if(prefix<14){ //FIXME try to build a large unified VLC table for all this if(prefix<14){ //FIXME try to build a large unified VLC table for all this
if(suffix_length) if(suffix_length)
level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
else else
level_code= (prefix<<suffix_length); //part level_code= (prefix<<suffix_length); //part
}else if(prefix==14){ }else if(prefix==14){
if(suffix_length) if(suffix_length)
level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
else else
level_code= prefix + get_bits(gb, 4); //part level_code= prefix + get_bits(gb, 4); //part
}else{ }else{
level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part
if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
if(prefix>=16) if(prefix>=16)
level_code += (1<<(prefix-3))-4096; level_code += (1<<(prefix-3))-4096;
} }
if(trailing_ones < 3) level_code += 2; if(trailing_ones < 3) level_code += 2;
suffix_length = 2; suffix_length = 2;
mask= -(level_code&1); mask= -(level_code&1);
level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask; level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
}else{ }else{
if(trailing_ones < 3) level_code += (level_code>>31)|1; if(trailing_ones < 3) level_code += (level_code>>31)|1;