/// <summary>
/// Saves the metadata, using an available <see cref="IMetadataEncoder"/>. If no extensions are able to write
/// to this file extension, an <see cref="UnsupportedAudioException"/>
/// </summary>
/// <param name="settings">The settings.</param>
/// <exception cref="UnsupportedAudioException">
/// No metadata encoders are able to save metadata in the required format.
/// </exception>
public void SaveMetadata(SettingsDictionary settings = null)
{
if (settings == null)
{
settings = new SettingsDictionary();
}
using (FileStream fileStream = FileInfo.Open(FileMode.Open, FileAccess.ReadWrite))
{
// Ensure the existing metadata has been loaded:
if (_metadata == null)
{
LoadMetadata(fileStream);
fileStream.Position = 0;
}
// Try each encoder that supports the file extension:
foreach (ExportFactory <IMetadataEncoder> encoderFactory in
ExtensionProvider.GetFactories <IMetadataEncoder>("Extension", FileInfo.Extension))
{
using (ExportLifetimeContext <IMetadataEncoder> lifetimeContext = encoderFactory.CreateExport())
{
IMetadataEncoder encoder = lifetimeContext.Value;
ValidateSettings(settings, encoder);
encoder.WriteMetadata(fileStream, Metadata, settings);
return;
}
}
}
throw new UnsupportedAudioException(Resources.TaggedAudioFileUnsupportedError);
}
public static ValueTask <FlushResult> WriteFrameAsync(this IMetadataEncoder encoder, PipeWriter writer, Frame frame, CancellationToken token = default)
{
encoder.WriteMetadata(writer, frame);
return(writer.WriteByChunkAsync(frame.Payload, token));
}