/// <summary>
/// Initialize the CueSheetTrack.
/// </summary>
/// <param name="data">The full data array.</param>
/// <param name="dataOffset">Where the cuesheet track begins.</param>
public CueSheetTrack(byte[] data, int dataOffset)
{
this.trackOffset = BinaryDataHelper.GetUInt64(data, dataOffset);
this.trackNumber = (byte)BinaryDataHelper.GetUInt64(data, dataOffset + 8, 8);
this.isrc = System.Text.Encoding.ASCII.GetString(data, dataOffset + 9, 12).Trim(new char[] { '\0' });
this.isAudioTrack = !BinaryDataHelper.GetBoolean(data, dataOffset + 21, 1); // 0 for audio
this.isPreEmphasis = BinaryDataHelper.GetBoolean(data, dataOffset + 21, 2);
// 6 bits + 13 bytes need to be zero, won't check this
byte indexPointCount = (byte)BinaryDataHelper.GetUInt64(data, dataOffset + 35, 8);
if (indexPointCount > 100)
{
throw new FlacLibSharp.Exceptions.FlacLibSharpInvalidFormatException(string.Format("CueSheet track nr {0} has an invalid Track Index Count of {1}. Maximum allowed is 100.", this.TrackNumber, indexPointCount));
}
// For all tracks, except the lead-in track, one or more track index points
dataOffset += 36;
for (int i = 0; i < indexPointCount; i++)
{
this.IndexPoints.Add(new CueSheetTrackIndex(data, dataOffset));
dataOffset += 12; // Index points are always 12 bytes long
}
if (indexPointCount != this.IndexPoints.Count)
{
// Should we be so strict?
throw new FlacLibSharp.Exceptions.FlacLibSharpInvalidFormatException(string.Format("CueSheet track nr {0} indicates {1} index points, but actually {2} index points are present.", this.TrackNumber, indexPointCount, this.IndexPoints.Count));
}
}
/// <summary>
/// Creates a new seekpoint.
/// </summary>
/// <param name="data"></param>
public SeekPoint(byte[] data)
{
this.firstSampleNumber = BinaryDataHelper.GetUInt64(data, 0);
this.byteOffset = BinaryDataHelper.GetUInt64(data, 8);
this.numberOfSamples = BinaryDataHelper.GetUInt16(data, 16);
ValidateIsPlaceholder();
}
/// <summary>
/// Loads a new stream info block from the provided data.
/// </summary>
/// <param name="data"></param>
public override void LoadBlockData(byte[] data)
{
// "All numbers are big-endian coded and unsigned".
// 1: Minimum Block Size (first 16-bit)
this.minimumBlockSize = BinaryDataHelper.GetUInt16(data, 0);
this.maximumBlockSize = BinaryDataHelper.GetUInt16(data, 2);
this.minimumFrameSize = BinaryDataHelper.GetUInt24(data, 4);
this.maximumFrameSize = BinaryDataHelper.GetUInt24(data, 7);
// Interpret 20 bits starting from byte 10 as a UInt
this.sampleRateHz = (UInt32)BinaryDataHelper.GetUInt64(data, 10, 20);
this.channels = (short)(BinaryDataHelper.GetUInt64(data, 12, 3, 4) + 1);
this.bitsPerSample = (short)(BinaryDataHelper.GetUInt64(data, 12, 5, 7) + 1);
this.samples = (long)BinaryDataHelper.GetUInt64(data, 13, 36, 4);
this.md5Signature = new byte[16];
Array.Copy(data, 18, this.md5Signature, 0, 16);
}
/// <summary>
/// Parses the binary metadata from the flac file into a CueSheet object.
/// </summary>
/// <param name="data">The binary data from the flac file.</param>
public override void LoadBlockData(byte[] data)
{
this.mediaCatalog = Encoding.ASCII.GetString(data, 0, 128).Trim(new char[] { '\0' });
this.leadInSampleCount = BinaryDataHelper.GetUInt64(data, 128);
this.isCDCueSheet = BinaryDataHelper.GetBoolean(data, 136, 0);
// We're skipping 7 bits + 258 bytes which is reserved null data
byte trackCount = data[395];
if (trackCount > 100)
{
// Do we really need to throw an exception here?
throw new Exceptions.FlacLibSharpInvalidFormatException(string.Format("CueSheet has invalid track count {0}. Cannot be more than 100.", trackCount));
}
int cueSheetTrackOffset = 396;
for (int i = 0; i < trackCount; i++)
{
CueSheetTrack newTrack = new CueSheetTrack(data, cueSheetTrackOffset);
cueSheetTrackOffset += 36 + (12 * newTrack.IndexPointCount); // 36 bytes for the cueSheetTrack and 12 bytes per index point ...
this.Tracks.Add(newTrack);
}
}
/// <summary>
/// Creates a new Cue Sheet Track Index based on the binary data provided.
/// </summary>
/// <param name="data"></param>
/// <param name="dataOffset">Where in the data array to start reading.</param>
public CueSheetTrackIndex(byte[] data, int dataOffset)
{
this.offset = BinaryDataHelper.GetUInt64(data, dataOffset);
this.indexPointNumber = (byte)BinaryDataHelper.GetUInt64(data, dataOffset + 8, 8);
}