PIXEL_STRIDE       35 tests/checkasm/h264dsp.c #define PIXEL_STRIDE 16
PIXEL_STRIDE       35 tests/checkasm/hevc_sao.c #define PIXEL_STRIDE (2*MAX_PB_SIZE + AV_INPUT_BUFFER_PADDING_SIZE) //same with sao_edge src_stride
PIXEL_STRIDE       31 tests/checkasm/vp8dsp.c #define PIXEL_STRIDE 16