public static WaveData Read(WavFile file)
{
var stream = new FileStream(file.FileName, FileMode.Open);
var result = Read(file, stream);
stream.Close();
return result;
}
public static Task<WaveData> ReadAsync(WavFile file, Stream stream, int samplesPerPixel)
{
return Task.Factory.StartNew<WaveData>(() =>
{
return Read(file,stream);
});
}
/// <summary>
/// Read wavfile infomation.
/// </summary>
/// <param name="stream">The stream of the file</param>
/// <returns></returns>
public static WavFile Read(Stream stream, int pixelPerSecond = 200, string cacheFile = "")
{
var file = new WavFile();
using (var reader = new BinaryReader(stream))
{
stream.Position = 0;
file.FileTag = string.Concat(reader.ReadChars(4));
if (file.FileTag != "RIFF")
{
throw new Exception("not RIFF file!");
}
file.FileLength = reader.ReadInt32();
stream.Position += 12;
file.WaveFormat = reader.ReadInt16();
if (file.WaveFormat != 1)
{
throw new Exception("not PCM format!");
}
file.Channels = reader.ReadInt16();
file.SampleRate = reader.ReadInt32();
file.BytesPerSecond = reader.ReadInt32();
stream.Position += 2;
file.SampleBit = reader.ReadInt16();
stream.Position = 36;
var data = string.Concat(reader.ReadChars(4));
while (data != "data") //find the start of data chunk
{
stream.Position -= 3;
data = string.Concat(reader.ReadChars(4));
}
file.DataSize = reader.ReadInt32();
file.DataOffset = stream.Position;
file.PixelPerSecond = pixelPerSecond;
file.ComputeFileInfo();
file.ReadCacheData(stream);
}
return(file);
}
public static WaveData Read(WavFile file, Stream stream)
{
stream.Position = file.DataOffset;
if(file.Channels == 1)
{
switch (file.SampleBit)
{
case 8:return Read1Channel(stream, file.SampleNumber, file.MaxWidth,Read8Bit);
case 16:return Read1Channel(stream, file.SampleNumber, file.MaxWidth,Read16Bit);
default: return null;
}
}
else
{
switch(file.SampleBit)
{
case 8: return Read2Channels(stream, file.SampleNumber/2, file.MaxWidth,Read8Bit);
case 16: return Read2Channels(stream, file.SampleNumber/2, file.MaxWidth,Read16Bit);
default: return null;
}
}
}
public static WaveData FromCacheFile(WavFile file, string filename)
{
return null;
}
/// <summary>
/// Read wavfile infomation.
/// </summary>
/// <param name="stream">The stream of the file</param>
/// <returns></returns>
public static WavFile Read(Stream stream, int pixelPerSecond = 200,string cacheFile = "")
{
var file = new WavFile();
using (var reader = new BinaryReader(stream))
{
stream.Position = 0;
file.FileTag = string.Concat(reader.ReadChars(4));
if (file.FileTag != "RIFF")
throw new Exception("not RIFF file!");
file.FileLength = reader.ReadInt32();
stream.Position += 12;
file.WaveFormat = reader.ReadInt16();
if (file.WaveFormat != 1)
throw new Exception("not PCM format!");
file.Channels = reader.ReadInt16();
file.SampleRate = reader.ReadInt32();
file.BytesPerSecond = reader.ReadInt32();
stream.Position += 2;
file.SampleBit = reader.ReadInt16();
stream.Position = 36;
var data = string.Concat(reader.ReadChars(4));
while(data != "data") //find the start of data chunk
{
stream.Position -= 3;
data = string.Concat(reader.ReadChars(4));
}
file.DataSize = reader.ReadInt32();
file.DataOffset = stream.Position;
file.PixelPerSecond = pixelPerSecond;
file.ComputeFileInfo();
file.ReadCacheData(stream);
}
return file;
}
public static ImageSource Draw1Channel(WavFile wavFile, WaveStyle style, double startPer,double scale, double width, double height)
{
using (var stream = File.Open(wavFile.FileName, FileMode.Open))
{
using (var reader = new BinaryReader(stream))
{
}
}
return null;
}
