/* and * align
arrays fitting in smaller types
variables written to twice with no interspaced read
-memset(block, 0, 6*64*sizeof(DCTELEM)); -> clear_blocks
+memset(block, 0, 6*64*sizeof(int16_t)); -> clear_blocks
check existence of long_name in AVCodec
check that the patch does not touch codec & (de)muxer layer at the same time ->split