public void ScanStream(FlacMetadataStreamInfo streamInfo, FlacPreScanMode mode)
{
long saveOffset = _stream.Position;
StartScan(streamInfo, mode);
_stream.Position = saveOffset;
long totalLength = 0, totalsamples = 0;
foreach (var frame in Frames)
{
totalLength += frame.Header.BlockSize * frame.Header.BitsPerSample * frame.Header.Channels;
totalsamples += frame.Header.BlockSize;
}
TotalLength = totalLength;
TotalSamples = totalsamples;
Debug.WriteLineIf(TotalSamples == streamInfo.TotalSamples, "Flac prescan successful. Calculated total_samples value matching the streaminfo-metadata.");
}
public void ScanStream(FlacMetadataStreamInfo streamInfo, FlacPreScanMode mode)
{
long saveOffset = _stream.Position;
StartScan(streamInfo, mode);
_stream.Position = saveOffset;
long totalLength = 0, totalsamples = 0;
foreach (var frame in Frames)
{
totalLength += frame.Header.BlockSize * frame.Header.BitsPerSample * frame.Header.Channels;
totalsamples += frame.Header.BlockSize;
}
TotalLength = totalLength;
TotalSamples = totalsamples;
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacFile" /> class.
/// </summary>
/// <param name="stream">Stream which contains flac data which should be decoded.</param>
/// <param name="scanFlag">Scan mode which defines how to scan the flac data for frames.</param>
/// <param name="onscanFinished">
/// Callback which gets called when the pre scan processes finished. Should be used if the
/// <paramref name="scanFlag" /> argument is set the <see cref="FlacPreScanMode.Async" />.
/// </param>
public FlacFile(Stream stream, FlacPreScanMode scanFlag = FlacPreScanMode.Default,
Action <FlacPreScanFinishedEventArgs> onscanFinished = null)
{
if (stream == null)
{
throw new ArgumentNullException();
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream is not readable.", nameof(stream));
}
_stream = stream;
_closeStream = true;
//skip ID3v2
SkipId3V2(stream);
//read metadata
var metadata = FlacMetadata.ReadAllMetadataFromStream(stream).ToList();
if (metadata.Count <= 0)
{
throw new FlacException("No Metadata found.", FlacLayer.Metadata);
}
var streamInfo =
metadata.First(x => x.MetaDataType == FlacMetaDataType.StreamInfo) as FlacMetadataStreamInfo;
_streamInfo = streamInfo ?? throw new FlacException("No StreamInfo-Metadata found.", FlacLayer.Metadata);
WaveFormat = CreateWaveFormat(streamInfo);
Debug.WriteLine("Flac StreamInfo found -> WaveFormat: " + WaveFormat);
Debug.WriteLine("Flac-File-Metadata read.");
//prescan stream
if (scanFlag != FlacPreScanMode.None)
{
var scan = new FlacPreScan(stream);
scan.ScanFinished += (s, e) =>
{
onscanFinished?.Invoke(e);
};
scan.ScanStream(_streamInfo, scanFlag);
_scan = scan;
}
}
public void ScanStream(FlacMetadataStreamInfo streamInfo, FlacPreScanMode mode)
{
long saveOffset = _stream.Position;
StartScan(streamInfo, mode);
_stream.Position = saveOffset;
long totalLength = 0, totalsamples = 0;
foreach (var frame in Frames)
{
totalLength += frame.Header.BlockSize * frame.Header.BitsPerSample * frame.Header.Channels;
totalsamples += frame.Header.BlockSize;
}
TotalLength = totalLength;
TotalSamples = totalsamples;
Debug.WriteLineIf(TotalSamples == streamInfo.TotalSamples, "Flac prescan successful. Calculated total_samples value matching the streaminfo-metadata.");
}
private void StartScan(FlacMetadataStreamInfo streamInfo, FlacPreScanMode mode)
{
if (_isRunning)
throw new Exception("Scan is already running.");
_isRunning = true;
if (mode == FlacPreScanMode.Async)
{
ThreadPool.QueueUserWorkItem(o =>
{
Frames = RunScan(streamInfo);
_isRunning = false;
});
}
else
{
Frames = RunScan(streamInfo);
_isRunning = false;
}
}
private void StartScan(FlacMetadataStreamInfo streamInfo, FlacPreScanMode mode)
{
if (_isRunning)
{
throw new Exception("Scan is already running.");
}
_isRunning = true;
if (mode == FlacPreScanMode.Async)
{
Task.Run(() =>
{
Frames = RunScan(streamInfo);
_isRunning = false;
});
}
else
{
Frames = RunScan(streamInfo);
_isRunning = false;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacFile" /> class.
/// </summary>
/// <param name="stream">Stream which contains flac data which should be decoded.</param>
/// <param name="scanFlag">Scan mode which defines how to scan the flac data for frames.</param>
/// <param name="onscanFinished">
/// Callback which gets called when the pre scan processes finished. Should be used if the
/// <paramref name="scanFlag" /> argument is set the <see cref="FlacPreScanMode.Async" />.
/// </param>
public FlacFile(Stream stream, FlacPreScanMode scanFlag,
Action<FlacPreScanFinishedEventArgs> onscanFinished)
{
if (stream == null)
throw new ArgumentNullException();
if (!stream.CanRead)
throw new ArgumentException("Stream is not readable.", "stream");
_stream = stream;
//skip ID3v2
ID3v2.SkipTag(stream);
//read fLaC sync
var beginSync = new byte[4];
int read = stream.Read(beginSync, 0, beginSync.Length);
if (read < beginSync.Length)
throw new EndOfStreamException("Can not read \"fLaC\" sync.");
if (beginSync[0] == 0x66 && beginSync[1] == 0x4C && //Check for 'fLaC' signature
beginSync[2] == 0x61 && beginSync[3] == 0x43)
{
//read metadata
List<FlacMetadata> metadata = FlacMetadata.ReadAllMetadataFromStream(stream).ToList();
Metadata = metadata.AsReadOnly();
if (metadata.Count <= 0)
throw new FlacException("No Metadata found.", FlacLayer.Metadata);
var streamInfo =
metadata.First(x => x.MetaDataType == FlacMetaDataType.StreamInfo) as FlacMetadataStreamInfo;
if (streamInfo == null)
throw new FlacException("No StreamInfo-Metadata found.", FlacLayer.Metadata);
_streamInfo = streamInfo;
_waveFormat = CreateWaveFormat(streamInfo);
Debug.WriteLine("Flac StreamInfo found -> WaveFormat: " + _waveFormat);
Debug.WriteLine("Flac-File-Metadata read.");
}
else
throw new FlacException("Invalid Flac-File. \"fLaC\" Sync not found.", FlacLayer.OutSideOfFrame);
//prescan stream
if (scanFlag != FlacPreScanMode.None)
{
var scan = new FlacPreScan(stream);
scan.ScanFinished += (s, e) =>
{
if (onscanFinished != null)
onscanFinished(e);
};
scan.ScanStream(_streamInfo, scanFlag);
_scan = scan;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacFile" /> class.
/// </summary>
/// <param name="stream">Stream which contains flac data which should be decoded.</param>
/// <param name="scanFlag">Scan mode which defines how to scan the flac data for frames.</param>
public FlacFile(Stream stream, FlacPreScanMode scanFlag)
: this(stream, scanFlag, null)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacFile" /> class.
/// </summary>
/// <param name="stream">Stream which contains flac data which should be decoded.</param>
/// <param name="scanFlag">Scan mode which defines how to scan the flac data for frames.</param>
public FlacFile(Stream stream, FlacPreScanMode scanFlag)
: this(stream, scanFlag, null)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="FlacFile" /> class.
/// </summary>
/// <param name="stream">Stream which contains flac data which should be decoded.</param>
/// <param name="scanFlag">Scan mode which defines how to scan the flac data for frames.</param>
/// <param name="onscanFinished">
/// Callback which gets called when the pre scan processes finished. Should be used if the
/// <paramref name="scanFlag" /> argument is set the <see cref="FlacPreScanMode.Async" />.
/// </param>
public FlacFile(Stream stream, FlacPreScanMode scanFlag,
Action <FlacPreScanFinishedEventArgs> onscanFinished)
{
if (stream == null)
{
throw new ArgumentNullException();
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream is not readable.", "stream");
}
_stream = stream;
_closeStream = true;
//skip ID3v2
while (ID3v2.SkipTag(stream))
{
}
//read fLaC sync
var beginSync = new byte[4];
int read = stream.Read(beginSync, 0, beginSync.Length);
if (read < beginSync.Length)
{
throw new EndOfStreamException("Can not read \"fLaC\" sync.");
}
if (beginSync[0] == 0x66 && beginSync[1] == 0x4C && //Check for 'fLaC' signature
beginSync[2] == 0x61 && beginSync[3] == 0x43)
{
//read metadata
List <FlacMetadata> metadata = FlacMetadata.ReadAllMetadataFromStream(stream).ToList();
Metadata = metadata.AsReadOnly();
if (metadata.Count <= 0)
{
throw new FlacException("No Metadata found.", FlacLayer.Metadata);
}
var streamInfo =
metadata.First(x => x.MetaDataType == FlacMetaDataType.StreamInfo) as FlacMetadataStreamInfo;
if (streamInfo == null)
{
throw new FlacException("No StreamInfo-Metadata found.", FlacLayer.Metadata);
}
_streamInfo = streamInfo;
_waveFormat = CreateWaveFormat(streamInfo);
Log.Verbose("Flac StreamInfo found -> WaveFormat: " + _waveFormat);
Log.Verbose("Flac-File-Metadata read.");
}
else
{
throw new FlacException("Invalid Flac-File. \"fLaC\" Sync not found.", FlacLayer.OutSideOfFrame);
}
//prescan stream
if (scanFlag != FlacPreScanMode.None)
{
var scan = new FlacPreScan(stream);
scan.ScanFinished += (s, e) =>
{
onscanFinished?.Invoke(e);
};
scan.ScanStream(_streamInfo, scanFlag);
_scan = scan;
}
}
private void StartScan(FlacMetadataStreamInfo streamInfo, FlacPreScanMode mode)
{
if (_isRunning)
throw new Exception("Scan is already running.");
_isRunning = true;
if (mode == FlacPreScanMode.Async)
{
ThreadPool.QueueUserWorkItem(o =>
{
Frames = RunScan(streamInfo);
_isRunning = false;
});
}
else
{
Frames = RunScan(streamInfo);
_isRunning = false;
}
}
