void audio_transform (boost::shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time);
std::pair<boost::shared_ptr<AudioBuffers>, DCPTime> discard_audio (
boost::shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to
) const;
void audio_transform (boost::shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time);
std::pair<boost::shared_ptr<AudioBuffers>, DCPTime> discard_audio (
boost::shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to
) const;