private float[] ReadChannelDataFromUnderlyingMixerStream(int mixerStream, int secondsToRead, int sampleRate)
{
float[] buffer = new float[sampleRate * DefaultBufferLengthInSeconds];
int totalBytesToRead = secondsToRead == 0 ? int.MaxValue : secondsToRead * sampleRate * 4;
int totalBytesRead = 0;
List <float[]> chunks = new List <float[]>();
while (totalBytesRead < totalBytesToRead)
{
// get re-sampled/mono data
int bytesRead = bassServiceProxy.ChannelGetData(mixerStream, buffer, buffer.Length * 4);
if (bytesRead == -1)
{
throw new BassAudioServiceException(bassServiceProxy.GetLastError());
}
if (bytesRead == 0)
{
break;
}
totalBytesRead += bytesRead;
float[] chunk;
if (totalBytesRead > totalBytesToRead)
{
chunk = new float[(totalBytesToRead - (totalBytesRead - bytesRead)) / 4];
Array.Copy(buffer, chunk, (totalBytesToRead - (totalBytesRead - bytesRead)) / 4);
}
else
{
chunk = new float[bytesRead / 4]; // each float contains 4 bytes
Array.Copy(buffer, chunk, bytesRead / 4);
}
chunks.Add(chunk);
}
if (totalBytesRead < (secondsToRead * sampleRate * 4))
{
throw new BassAudioServiceException(
"Could not read requested number of seconds " + secondsToRead + ", audio file is not that long");
}
return(ConcatenateChunksOfSamples(chunks));
}
public int GetNextSamples(float[] buffer)
{
return(proxy.ChannelGetData(source, buffer, buffer.Length * 4));
}