public static void WAVFromPCM(Stream input, Stream output, short channels, int samplesPerSec, int bitsPerSample, int samples = 0, IProgressReport writingProgress = null)
{
short sample_size = (short)((bitsPerSample / 8) * channels);
using (BinaryWriter writer = new BinaryWriter(new StreamKeeper(output)))
{
writer.Write(new char[] { 'R', 'I', 'F', 'F' });
writer.Write((int)0); // Skip size of wave file
writer.Write(new char[] { 'W', 'A', 'V', 'E' });
writer.Write(new char[] { 'f', 'm', 't', ' ' });
writer.Write((int)16); // Size of header
writer.Write((short)1); // Format tag - PCM
writer.Write(channels);
writer.Write(samplesPerSec);
writer.Write((int)(sample_size * samplesPerSec)); // average bytes per sec
writer.Write(sample_size); // full sample size..
writer.Write((short)bitsPerSample);
writer.Write(new char[] { 'd', 'a', 't', 'a' });
writer.Write((int)0); // Skip size of data
}
if (samples != 0)
{
if (input.CopyToCount(output, samples * sample_size, writingProgress) != samples * sample_size)
{
// Check output size
throw new Exception("Invalid WAV size");
}
}
else
{
// Write the pcm
input.CopyTo(output);
if (writingProgress != null)
{
writingProgress.SetProgress(writingProgress.GetFullValue());
}
}
output.Seek(4, SeekOrigin.Begin);
// Write the size
using (BinaryWriter writer = new BinaryWriter(new StreamKeeper(output)))
{
writer.Write((int)(output.Length - 8));
}
output.Seek(40, SeekOrigin.Begin);
// Write the size
using (BinaryWriter writer = new BinaryWriter(new StreamKeeper(output)))
{
writer.Write((int)(output.Length - 44));
}
}
public SubProgressReport(IProgressReport report, long units = 100)
: this(report, 0, report.GetFullValue(), units)
{
}
