RTKIT_FOURCC
if (letoh32(hdr.fourcc) != RTKIT_FOURCC("CLHE")) {
if (fourcc == RTKIT_FOURCC("CLHE"))
if (fourcc == RTKIT_FOURCC("Cstr"))
if (fourcc == RTKIT_FOURCC("Cver"))
if (fourcc == RTKIT_FOURCC("Cmbx"))
if (fourcc == RTKIT_FOURCC("Crg8"))