// On disk
struct MotionChannelHeader
{
    uint8 Zero;
    uint8 TypeFlags;    // 0 = TimeCoded, 1 = AdaptiveDelta4, 2 = AdaptiveDelta8
    uint8 VectorLength
    uint8 unk1;
    sint16 unk2;
    sint16; unk3;
};

// On disk, follows MotionChannelHeader, vector length cannot be > 4, 1 = Scalar, 3 = Vector, 4 = Quaternion
struct AdaptiveDeltaHeader
{
    float unk4;
    float vector[4];
    uint8 data[chunksize - 12 - 4 * vectorlength];
}

// In memory
struct MotionChannel
{
    void *vtable;
    int unk1;
    int unk3;
    int unk2;
    int VectorLength;
    float unk4;
    float vector[4];     // Could be a union?
    uint8 *data;
};