/// <summary>
/// Compares timestamps on .wav files and .mp3 files to see if we need to update any .mp3 files.
/// Be aware that if you are staging audio files in preparation for publishing, the bookFolderPath
/// should be the original book folder files, not the staged files. Otherwise you may get unexpected
/// results. (See BL-5437)
/// </summary>
public static bool IsAnyCompressedAudioMissing(string bookFolderPath, XmlDocument dom)
{
if (!LameEncoder.IsAvailable())
{
return(true);
}
return(!GetTrueForAllAudioSpans(bookFolderPath, dom,
(wavpath, mp3path) => !Mp3IsNeeded(wavpath, mp3path)));
}
/// <summary>
/// Make a compressed audio file for the specified .wav file.
/// </summary>
public static string MakeCompressedAudio(string wavPath)
{
// We have a recording, but not compressed. Possibly the LAME package was installed after
// the recordings were made. Compress it now.
if (s_mp3Encoder == null)
{
s_mp3Encoder = new LameEncoder();
}
return(s_mp3Encoder.Encode(wavPath));
}
/// <summary>
/// Make a compressed audio file for the specified .wav file.
/// (Or return null if it can't be done because we don't have a LAME package installed.)
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
// internal and virtual for testing.
private static string MakeCompressedAudio(string wavPath)
{
// We have a recording, but not compressed. Possibly the LAME package was installed after
// the recordings were made. Compress it now.
if (_mp3Encoder == null)
{
if (!LameEncoder.IsAvailable())
{
return(null);
}
_mp3Encoder = new LameEncoder();
}
_mp3Encoder.Encode(wavPath, wavPath.Substring(0, wavPath.Length - 4), new NullProgress());
return(Path.ChangeExtension(wavPath, "mp3"));
}
