public static void Concatenate(string outputFile, IEnumerable <string> sourceFiles)
{
byte[] buffer = new byte[1024];
WaveFileWriter waveFileWriter = null;
try
{
foreach (string sourceFile in sourceFiles)
{
using (var reader = new MediaFoundationReader(sourceFile))
{
using (var resampledReader = new ResamplerDmoStream(reader, new WaveFormat(
reader.WaveFormat.SampleRate,
reader.WaveFormat.BitsPerSample,
reader.WaveFormat.Channels)))
{
if (waveFileWriter == null)
{
waveFileWriter = new WaveFileWriter(outputFile, reader.WaveFormat);
}
else
{
if (!reader.WaveFormat.Equals(waveFileWriter.WaveFormat))
{
throw new InvalidOperationException(
"Can't concatenate WAV Files that don't share the same format");
}
}
int read;
while ((read = resampledReader.Read(buffer, 0, buffer.Length)) > 0)
{
waveFileWriter.WriteData(buffer, 0, read);
}
}
}
}
}
finally
{
if (waveFileWriter != null)
{
waveFileWriter.Dispose();
}
}
}
public void CanReadABlockFromResamplerStream()
{
//using (WaveFileReader reader = new WaveFileReader("C:\\Users\\Mark\\Recording\\REAPER\\ideas-2008-05-17.wav"))
WaveFormat inputFormat = new WaveFormat(44100, 16, 1);
using (WaveStream reader = new NullWaveStream(inputFormat, inputFormat.AverageBytesPerSecond * 20))
{
using (ResamplerDmoStream resampler = new ResamplerDmoStream(reader, WaveFormat.CreateIeeeFloatWaveFormat(48000, 2)))
{
// try to read 10 ms;
int bytesToRead = resampler.WaveFormat.AverageBytesPerSecond / 100;
byte[] buffer = new byte[bytesToRead];
int count = resampler.Read(buffer, 0, bytesToRead);
Assert.That(count > 0, "Bytes Read");
}
}
}
private byte[] ResampleBytesDMO(byte[] inputByteArray, int length)
{
byte[] outBuffer = new byte[length * bufferMultiplier];
buf.AddSamples(inputByteArray, 0, length);
int read = dmoResampler.Read(outBuffer, 0, outBuffer.Length);
if (read == 0)
{
return(new byte[0]);
}
else
{
byte[] finalBuf = new byte[read];
Buffer.BlockCopy(outBuffer, 0, finalBuf, 0, read);
return(finalBuf);
}
}
private void ResampleAWholeStream(WaveFormat inputFormat, WaveFormat outputFormat)
{
using (WaveStream reader = new NullWaveStream(inputFormat, inputFormat.AverageBytesPerSecond * 20))
{
using (ResamplerDmoStream resampler = new ResamplerDmoStream(reader, outputFormat))
{
// try to read 10 ms;
int bytesToRead = resampler.WaveFormat.AverageBytesPerSecond / 100;
byte[] buffer = new byte[bytesToRead];
int count;
int total = 0;
do
{
count = resampler.Read(buffer, 0, bytesToRead);
total += count;
//Assert.AreEqual(count, bytesToRead, "Bytes Read");
} while (count > 0);
//Debug.WriteLine(String.Format("Converted input length {0} to {1}", reader.Length, total));
}
}
}
