// ---------------------------------------------------------------------------
private bool HeaderIsValid(WAVRecord WAVData)
{
bool result = true;
// Header validation
if (!Utils.StringEqualsArr("RIFF", WAVData.RIFFHeader))
{
result = false;
}
if (!Utils.StringEqualsArr("WAVE", WAVData.WAVEHeader))
{
result = false;
}
if (!Utils.StringEqualsArr("fmt ", WAVData.FormatHeader))
{
result = false;
}
if ((WAVData.ChannelNumber != WAV_CM_MONO) &&
(WAVData.ChannelNumber != WAV_CM_STEREO))
{
result = false;
}
return(result);
}
// ********************* Auxiliary functions & voids ********************
private bool ReadWAV(String FileName, ref WAVRecord WAVData)
{
bool result = true;
FileStream fs = null;
BinaryReader SourceFile = null;
try
{
// Set read-access and open file
fs = new FileStream(FileName, FileMode.Open, FileAccess.Read);
SourceFile = new BinaryReader(fs);
// Read header
WAVData.RIFFHeader = SourceFile.ReadChars(WAVData.RIFFHeader.Length);
WAVData.FileSize = SourceFile.ReadInt32();
WAVData.WAVEHeader = SourceFile.ReadChars(WAVData.WAVEHeader.Length);
WAVData.FormatHeader = SourceFile.ReadChars(WAVData.FormatHeader.Length);
WAVData.FormatSize = SourceFile.ReadInt32();
WAVData.FormatID = SourceFile.ReadUInt16();
WAVData.ChannelNumber = SourceFile.ReadUInt16();
WAVData.SampleRate = SourceFile.ReadInt32();
WAVData.BytesPerSecond = SourceFile.ReadInt32();
WAVData.BlockAlign = SourceFile.ReadUInt16();
WAVData.BitsPerSample = SourceFile.ReadUInt16();
WAVData.DataHeader = SourceFile.ReadChars(WAVData.DataHeader.Length);
// Read number of samples if exists
if (!Utils.StringEqualsArr(DATA_CHUNK, WAVData.DataHeader))
{
SourceFile.BaseStream.Seek(WAVData.FormatSize + 28, SeekOrigin.Begin);
WAVData.SampleNumber = SourceFile.ReadInt32();
}
}
catch (Exception e)
{
System.Console.WriteLine(e.StackTrace);
result = false;
}
if (SourceFile != null)
{
SourceFile.Close();
}
if (fs != null)
{
fs.Close();
}
return(result);
}
// ---------------------------------------------------------------------------
public bool ReadFromFile(String FileName)
{
WAVRecord WAVData = new WAVRecord();
// Reset and load header data from file to variable
FResetData();
WAVData.Reset();
bool result = ReadWAV(FileName, ref WAVData);
// Process data if loaded and header valid
if ((result) && (HeaderIsValid(WAVData)))
{
FValid = true;
// Fill properties with header data
FFormatID = WAVData.FormatID;
FChannelNumber = (byte)WAVData.ChannelNumber;
FSampleRate = (uint)WAVData.SampleRate;
FBytesPerSecond = (uint)WAVData.BytesPerSecond;
FBlockAlign = WAVData.BlockAlign;
FBitsPerSample = (byte)WAVData.BitsPerSample;
FSampleNumber = WAVData.SampleNumber;
if (Utils.StringEqualsArr(DATA_CHUNK, WAVData.DataHeader))
{
FHeaderSize = 44;
}
else
{
FHeaderSize = (ushort)(WAVData.FormatSize + 40);
}
FFileSize = (uint)WAVData.FileSize + 8;
if (FHeaderSize > FFileSize)
{
FHeaderSize = (ushort)FFileSize;
}
}
return(result);
}
// ---------------------------------------------------------------------------
public bool ReadFromFile(String FileName)
{
WAVRecord WAVData = new WAVRecord();
// Reset and load header data from file to variable
FResetData();
WAVData.Reset();
bool result = ReadWAV(FileName, ref WAVData);
// Process data if loaded and header valid
if ( (result) && (HeaderIsValid(WAVData)) )
{
FValid = true;
// Fill properties with header data
FFormatID = WAVData.FormatID;
FChannelNumber = (byte)WAVData.ChannelNumber;
FSampleRate = (uint)WAVData.SampleRate;
FBytesPerSecond = (uint)WAVData.BytesPerSecond;
FBlockAlign = WAVData.BlockAlign;
FBitsPerSample = (byte)WAVData.BitsPerSample;
FSampleNumber = WAVData.SampleNumber;
if ( Utils.StringEqualsArr(DATA_CHUNK, WAVData.DataHeader) ) FHeaderSize = 44;
else FHeaderSize = (ushort)(WAVData.FormatSize + 40);
FFileSize = (uint)WAVData.FileSize + 8;
if (FHeaderSize > FFileSize) FHeaderSize = (ushort)FFileSize;
}
return result;
}
// ---------------------------------------------------------------------------
private bool HeaderIsValid(WAVRecord WAVData)
{
bool result = true;
// Header validation
if (! Utils.StringEqualsArr("RIFF",WAVData.RIFFHeader)) result = false;
if (! Utils.StringEqualsArr("WAVE",WAVData.WAVEHeader)) result = false;
if (! Utils.StringEqualsArr("fmt ",WAVData.FormatHeader)) result = false;
if ( (WAVData.ChannelNumber != WAV_CM_MONO) &&
(WAVData.ChannelNumber != WAV_CM_STEREO) ) result = false;
return result;
}
// ********************* Auxiliary functions & voids ********************
private bool ReadWAV(String FileName, ref WAVRecord WAVData)
{
bool result = true;
FileStream fs = null;
BinaryReader SourceFile = null;
try
{
// Set read-access and open file
fs = new FileStream(FileName, FileMode.Open, FileAccess.Read);
SourceFile = new BinaryReader(fs);
// Read header
WAVData.RIFFHeader = SourceFile.ReadChars(WAVData.RIFFHeader.Length);
WAVData.FileSize = SourceFile.ReadInt32();
WAVData.WAVEHeader = SourceFile.ReadChars(WAVData.WAVEHeader.Length);
WAVData.FormatHeader = SourceFile.ReadChars(WAVData.FormatHeader.Length);
WAVData.FormatSize = SourceFile.ReadInt32();
WAVData.FormatID = SourceFile.ReadUInt16();
WAVData.ChannelNumber = SourceFile.ReadUInt16();
WAVData.SampleRate = SourceFile.ReadInt32();
WAVData.BytesPerSecond = SourceFile.ReadInt32();
WAVData.BlockAlign = SourceFile.ReadUInt16();
WAVData.BitsPerSample = SourceFile.ReadUInt16();
WAVData.DataHeader = SourceFile.ReadChars(WAVData.DataHeader.Length);
// Read number of samples if exists
if ( ! Utils.StringEqualsArr(DATA_CHUNK,WAVData.DataHeader))
{
SourceFile.BaseStream.Seek(WAVData.FormatSize + 28, SeekOrigin.Begin);
WAVData.SampleNumber = SourceFile.ReadInt32();
}
}
catch (Exception e)
{
System.Console.WriteLine(e.StackTrace);
result = false;
}
if (SourceFile != null) SourceFile.Close();
if (fs != null) fs.Close();
return result;
}
