UNROLL1           179 libavcodec/pngdec.c          if(bpp == 1) UNROLL1(1, op)\
UNROLL1           180 libavcodec/pngdec.c     else if(bpp == 2) UNROLL1(2, op)\
UNROLL1           181 libavcodec/pngdec.c     else if(bpp == 3) UNROLL1(3, op)\
UNROLL1           182 libavcodec/pngdec.c     else if(bpp == 4) UNROLL1(4, op)\