/// <summary>Marshals a FLAC entropy coding method</summary>
/// <param name="frameHandle">
/// Handle to unmanaged memory containing the entropy coding method
/// </param>
/// <param name="offset">
/// Offset at which to begin reading this entropy coding method
/// </param>
/// <returns>The marshaled entropy coding method</returns>
private static EntropyCodingMethod marshalEntropyCodingMethod(
IntPtr frameHandle, int offset
)
{
EntropyCodingMethod entropyCodingMethod = new EntropyCodingMethod();
entropyCodingMethod.Type = EntropyCodingMethodTypeFromInt(
Marshal.ReadInt32(frameHandle, offset)
);
switch (entropyCodingMethod.Type)
{
// Rice Partition Coding scheme 1
case EntropyCodingMethodType.PartitionedRice: {
entropyCodingMethod.PartitionedRice.Order = Marshal.ReadInt32(
frameHandle, offset + 4
);
IntPtr contentsAddress = Marshal.ReadIntPtr(frameHandle, offset + 8);
entropyCodingMethod.PartitionedRice.Contents.Parameters = null;
entropyCodingMethod.PartitionedRice.Contents.RawBits = null;
entropyCodingMethod.PartitionedRice.Contents.CapacityByOrder = Marshal.ReadInt32(
contentsAddress, 8
);
break;
}
// Rice Partition Coding scheme 2
case EntropyCodingMethodType.PartitionedRice2: {
entropyCodingMethod.PartitionedRice.Order = Marshal.ReadInt32(
frameHandle, offset + 4
);
IntPtr contentsAddress = Marshal.ReadIntPtr(frameHandle, offset + 8);
entropyCodingMethod.PartitionedRice.Contents.Parameters = null;
entropyCodingMethod.PartitionedRice.Contents.RawBits = null;
entropyCodingMethod.PartitionedRice.Contents.CapacityByOrder = Marshal.ReadInt32(
contentsAddress, 8
);
break;
}
}
return(entropyCodingMethod);
}
/// <summary>Marshals a FLAC entropy coding method</summary>
/// <param name="frameHandle">
/// Handle to unmanaged memory containing the entropy coding method
/// </param>
/// <param name="offset">
/// Offset at which to begin reading this entropy coding method
/// </param>
/// <returns>The marshaled entropy coding method</returns>
private static EntropyCodingMethod marshalEntropyCodingMethod(
IntPtr frameHandle, int offset
) {
EntropyCodingMethod entropyCodingMethod = new EntropyCodingMethod();
entropyCodingMethod.Type = EntropyCodingMethodTypeFromInt(
Marshal.ReadInt32(frameHandle, offset)
);
switch(entropyCodingMethod.Type) {
// Rice Partition Coding scheme 1
case EntropyCodingMethodType.PartitionedRice: {
entropyCodingMethod.PartitionedRice.Order = Marshal.ReadInt32(
frameHandle, offset + 4
);
IntPtr contentsAddress = Marshal.ReadIntPtr(frameHandle, offset + 8);
entropyCodingMethod.PartitionedRice.Contents.Parameters = null;
entropyCodingMethod.PartitionedRice.Contents.RawBits = null;
entropyCodingMethod.PartitionedRice.Contents.CapacityByOrder = Marshal.ReadInt32(
contentsAddress, 8
);
break;
}
// Rice Partition Coding scheme 2
case EntropyCodingMethodType.PartitionedRice2: {
entropyCodingMethod.PartitionedRice.Order = Marshal.ReadInt32(
frameHandle, offset + 4
);
IntPtr contentsAddress = Marshal.ReadIntPtr(frameHandle, offset + 8);
entropyCodingMethod.PartitionedRice.Contents.Parameters = null;
entropyCodingMethod.PartitionedRice.Contents.RawBits = null;
entropyCodingMethod.PartitionedRice.Contents.CapacityByOrder = Marshal.ReadInt32(
contentsAddress, 8
);
break;
}
}
return entropyCodingMethod;
}
