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Code Issues Releases Activity

H.264: Simplify decode_residual()

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Originally committed as revision 17750 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2009-03-03 05:26:39 +00:00
parent 0c89ca72a5
commit 09a64ee614
1 changed files with 4 additions and 5 deletions
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9
libavcodec/h264.c
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@ -4187,17 +4187,16 @@ static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, in
//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(suffix_length)
level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
level_code= (prefix<<1) + get_bits1(gb); //part
else
level_code= (prefix<<suffix_length); //part
level_code= prefix; //part
}else if(prefix==14){
if(suffix_length)
level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
level_code= (prefix<<1) + get_bits1(gb); //part
else
level_code= prefix + get_bits(gb, 4); //part
}else{
level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part
if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
level_code= 30 + get_bits(gb, prefix-3); //part
if(prefix>=16)
level_code += (1<<(prefix-3))-4096;
}