/// <summary>
/// Will write the data representing this header (as it is stored in the FLAC file) to the given stream.
/// </summary>
/// <param name="targetStream">The stream where the data will be written to.</param>
public void WriteHeaderData(Stream targetStream)
{
byte data = this.isLastMetaDataBlock ? (byte)128 : (byte)0; // The 128 because the last metadata flag is the most significant bit set to 1 ...
data += (byte)(this.typeID & 0x7F); // We make sure to chop off the last bit
targetStream.WriteByte(data);
// 24-bit metaDataBlockLength
targetStream.Write(BinaryDataHelper.GetBytes((UInt64)this.metaDataBlockLength, 3), 0, 3);
}
/// <summary>
/// When overridden in a derived class, will write the data describing this metadata block to the given stream.
/// </summary>
/// <param name="targetStream">Stream to write the data to.</param>
public override void WriteBlockData(Stream targetStream)
{
this.Header.WriteHeaderData(targetStream);
targetStream.Write(BinaryDataHelper.GetBytesUInt16(this.minimumBlockSize), 0, 2);
targetStream.Write(BinaryDataHelper.GetBytesUInt16(this.maximumBlockSize), 0, 2);
targetStream.Write(BinaryDataHelper.GetBytes(this.minimumFrameSize, 3), 0, 3);
targetStream.Write(BinaryDataHelper.GetBytes(this.maximumFrameSize, 3), 0, 3);
// next are 64 bits containing:
// * sample rate in Hz (20-bits)
// * number of channels (3 bits)
// * bits per sample (5 bits)
// * total samples per stream (36 bits)
UInt64 combinedData = (UInt64)this.SampleRateHz << 44;
combinedData = combinedData + ((UInt64)(this.channels - 1) << 41);
combinedData = combinedData + ((UInt64)(this.bitsPerSample - 1) << 36);
combinedData = combinedData + (UInt64)this.samples;
targetStream.Write(BinaryDataHelper.GetBytes(combinedData, 8), 0, 8);
targetStream.Write(this.md5Signature, 0, 16);
}
