- void put (boost::shared_ptr<const AudioBuffers> data, DCPTime time);
- void get (float* out, int channels, int frames);
+ void put (boost::shared_ptr<const AudioBuffers> data, DCPTime time, int frame_rate);
+ boost::optional<DCPTime> get (float* out, int channels, int frames);
+ boost::optional<DCPTime> peek () const;