public static void TranscodePreview(IList <int> previewtimes, List <AudioFormat.Mapping> maps, IDecoder decoder, Stream stream, ProgressIndicator progress)
{
RawkAudio.Encoder encoder;
if (maps != null && maps.Count(m => m.Instrument == Instrument.Preview) > 0)
{
decoder.Seek(0);
List <ushort> masks = new List <ushort>();
foreach (var m in maps)
{
if (m.Instrument == Instrument.Preview)
{
masks.Add((ushort)(1 << maps.IndexOf(m)));
}
}
ushort[] mask = masks.ToArray();
encoder = new RawkAudio.Encoder(stream, mask.Length, decoder.SampleRate, 28000);
long samples = decoder.Samples;
progress.NewTask("Transcoding Preview", samples);
JaggedShortArray buffer = new JaggedShortArray(encoder.Channels, decoder.AudioBuffer.Rank2);
while (samples > 0)
{
int read = decoder.Read((int)Math.Min(samples, decoder.AudioBuffer.Rank2));
if (read <= 0)
{
break;
}
decoder.AudioBuffer.DownmixTo(buffer, mask, read);
encoder.Write(buffer, read);
samples -= read;
progress.Progress(read);
}
progress.EndTask();
}
else
{
long start = Math.Min(decoder.Samples, (long)previewtimes[0] * decoder.SampleRate / 1000);
decoder.Seek(start);
long duration = Math.Min(decoder.Samples - start, (long)(previewtimes[1] - previewtimes[0]) * decoder.SampleRate / 1000);
encoder = new RawkAudio.Encoder(stream, 1, decoder.SampleRate);
AudioFormat.Transcode(encoder, decoder, duration, progress);
}
encoder.Dispose();
}
internal void EncodeOggAudio(AudioFormat data, FormatData destination, IFormat format, Stream stream, ProgressIndicator progress)
{
IDecoder decoder = data.Decoder;
RawkAudio.Encoder encoder = new RawkAudio.Encoder(stream, decoder.Channels, decoder.SampleRate);
AudioFormat.ProcessOffset(decoder, encoder, data.InitialOffset);
progress.NewTask(1);
AudioFormat.Transcode(encoder, decoder, progress);
progress.Progress();
encoder.Dispose();
destination.CloseStream(format, AudioName);
decoder.Dispose();
data.Save(destination.AddStream(format, FormatName));
destination.CloseStream(format, FormatName);
progress.EndTask();
}
