public async Task WriteFileAsync(PCM16Audio lwav, string output_dir, string original_filename_no_ext)
{
string output_filename = Path.Combine(output_dir, original_filename_no_ext + ".ogg");
// Don't re-encode if the original input file was also Ogg Vorbis
if (lwav.OriginalPath != null && new string[] { ".ogg", ".logg" }.Contains(Path.GetExtension(lwav.OriginalPath), StringComparer.InvariantCultureIgnoreCase))
{
File.Copy(lwav.OriginalPath, output_filename, true);
}
else
{
await sox.WriteFileAsync(lwav, output_filename, encodingParameters);
}
using (VorbisFile file = new VorbisFile(File.ReadAllBytes(output_filename))) {
var commentHeader = file.GetPageHeaders().Select(p => p.GetCommentHeader()).Where(h => h != null).FirstOrDefault();
var comments = commentHeader?.ExtractComments() ?? new VorbisComments();
if (lwav.Looping)
{
if (commentHeader == null)
{
throw new Exception("No comment header found in Ogg Vorbis file - cannot edit it to make it loop.");
}
comments.Comments.TryGetValue("LOOPSTART", out string loopStart);
comments.Comments.TryGetValue("LOOPLENGTH", out string loopLength);
if (loopStart != lwav.LoopStart.ToString() || loopLength != lwav.LoopLength.ToString())
{
comments.Comments["LOOPSTART"] = lwav.LoopStart.ToString();
comments.Comments["LOOPLENGTH"] = lwav.LoopLength.ToString();
using (VorbisFile newFile = new VorbisFile(file, comments)) {
File.WriteAllBytes(output_filename, newFile.ToByteArray());
}
}
}
else
{
if (comments.Comments.ContainsKey("LOOPSTART") || comments.Comments.ContainsKey("LOOPLENGTH"))
{
comments.Comments.Remove("LOOPSTART");
comments.Comments.Remove("LOOPLENGTH");
using (VorbisFile newFile = new VorbisFile(file, comments)) {
File.WriteAllBytes(output_filename, newFile.ToByteArray());
}
}
}
}
}
public async Task WriteFileAsync(PCM16Audio lwav, string output_dir, string original_filename_no_ext)
{
await sox.WriteFileAsync(lwav, Path.Combine(output_dir, original_filename_no_ext + ".flac"));
}
