Transformation builder doesn't support converting audio files to WAV, though Exoplayer can play WAV.

Before filing a feature request:

• Search existing open issues, specifically with the label ‘enhancement’:
  https://github.com/androidx/media/labels/enhancement
• For ExoPlayer-related feature requests, please also check for existing feature
  requests on the ExoPlayer tracker:
  https://github.com/google/ExoPlayer/labels/enhancement
• Search existing pull requests:
  • On this tracker: https://github.com/androidx/media/pulls,
  • On the ExoPlayer tracker: https://github.com/google/ExoPlayer/pulls

When filing a feature request:

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[REQUIRED] Use case description

I'm building an Audio Production app, and the files I generate will be in WAV format. I'd like to be able to import non-WAV files and convert them to WAV files so I can treat all audio files in the same way. However, DefaultMuxer.Factory() doesn't list WAV files as supported, so attempting to transform into WAV fails.

Proposed solution

Add MimeTypes.AUDIO_WAV to Muxer.Factory#SUPPORTED_AUDIO_SAMPLE_MIME_TYPES and support converting a supported audio file type to WAV, ie

Transformer.Builder(context)
            .setAudioMimeType(MimeTypes.AUDIO_WAV)
            .build()

Alternatives considered