JPU_JPEG_420
if (subsampling != JPU_JPEG_422 && subsampling != JPU_JPEG_420)
if (subsampling == JPU_JPEG_420) {
{8, 4}, 2, 2, JPU_JPEG_420, 2, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
{12, 0}, 2, 2, JPU_JPEG_420, 1, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },