/// <summary>
/// Initializes a new instance of the <see cref="FlacMetadataStreamInfo" /> class.
/// </summary>
/// <param name="stream">The stream which contains the <see cref="FlacMetadataStreamInfo"/>.</param>
/// <param name="length">The length of the <see cref="FlacMetadataStreamInfo"/> inside of the stream in bytes. Does not include the metadata header.</param>
/// <param name="lastBlock">
/// A value which indicates whether this is the last <see cref="FlacMetadata" /> block inside of
/// the stream. <c>true</c> means that this is the last <see cref="FlacMetadata" /> block inside of the stream.
/// </param>
public unsafe FlacMetadataStreamInfo(Stream stream, int length, bool lastBlock)
: base(FlacMetaDataType.StreamInfo, lastBlock, length)
{
//http://flac.sourceforge.net/format.html#metadata_block_streaminfo
var reader = new BinaryReader(stream, Encoding.ASCII);
try
{
MinBlockSize = reader.ReadInt16();
MaxBlockSize = reader.ReadInt16();
}
catch (IOException e)
{
throw new FlacException(e, FlacLayer.Metadata);
}
const int bytesToRead = (240 / 8) - 16;
byte[] buffer = reader.ReadBytes(bytesToRead);
if (buffer.Length != bytesToRead)
{
throw new FlacException(new EndOfStreamException("Could not read StreamInfo-content"),
FlacLayer.Metadata);
}
fixed (byte* b = buffer)
{
var bitreader = new FlacBitReader(b, 0);
MinFrameSize = (int) bitreader.ReadBits(24);
MaxFrameSize = (int) bitreader.ReadBits(24);
SampleRate = (int) bitreader.ReadBits(20);
Channels = 1 + (int) bitreader.ReadBits(3);
BitsPerSample = 1 + (int) bitreader.ReadBits(5);
TotalSamples = (long) bitreader.ReadBits64(36);
Md5 = new String(reader.ReadChars(16));
}
}
public unsafe FlacMetadataStreamInfo(Stream stream, Int32 length, bool lastBlock)
: base(FlacMetaDataType.StreamInfo, lastBlock, length)
{
//http://flac.sourceforge.net/format.html#metadata_block_streaminfo
BinaryReader reader = new BinaryReader(stream, Encoding.ASCII);
try
{
MinBlockSize = reader.ReadInt16();
MaxBlockSize = reader.ReadInt16();
}
catch (IOException e)
{
throw new FlacException(e, FlacLayer.Metadata);
}
int bytesToRead = (240 / 8) - 16;
byte[] buffer = reader.ReadBytes(bytesToRead);
if (buffer.Length != bytesToRead)
throw new FlacException(new EndOfStreamException("Could not read StreamInfo-content"), FlacLayer.Metadata);
fixed(byte *b = buffer)
{
FlacBitReader bitreader = new FlacBitReader(b, 0);
MinFrameSize = bitreader.ReadBits(24);
MaxFrameSize = bitreader.ReadBits(24);
SampleRate = (int)bitreader.ReadBits(20);
Channels = 1 + (int)bitreader.ReadBits(3);
BitsPerSample = 1 + (int)bitreader.ReadBits(5);
TotalSamples = (long)bitreader.ReadBits64(36);
MD5 = new String(reader.ReadChars(16));
}
}
/// <summary>
/// Initializes the properties of the <see cref="FlacMetadata"/> by reading them from the <paramref name="stream"/>.
/// </summary>
/// <param name="stream">The stream which contains the metadata.</param>
protected override unsafe void InitializeByStream(Stream stream)
{
//http://flac.sourceforge.net/format.html#metadata_block_streaminfo
var reader = new BinaryReader(stream, Encoding.ASCII);
try
{
MinBlockSize = reader.ReadInt16();
MaxBlockSize = reader.ReadInt16();
}
catch (IOException e)
{
throw new FlacException(e, FlacLayer.Metadata);
}
const int bytesToRead = (240 / 8) - 16;
var buffer = reader.ReadBytes(bytesToRead);
if (buffer.Length != bytesToRead)
{
throw new FlacException(new EndOfStreamException("Could not read StreamInfo-content"),
FlacLayer.Metadata);
}
fixed(byte *b = buffer)
{
var bitreader = new FlacBitReader(b, 0);
MinFrameSize = (int)bitreader.ReadBits(24);
MaxFrameSize = (int)bitreader.ReadBits(24);
SampleRate = (int)bitreader.ReadBits(20);
Channels = 1 + (int)bitreader.ReadBits(3);
BitsPerSample = 1 + (int)bitreader.ReadBits(5);
TotalSamples = (long)bitreader.ReadBits64(36);
Md5 = new string(reader.ReadChars(16));
}
}
