- TimedAudioBuffers<T>
- pull (T time)
- {
- assert (time >= _last_pull);
-
- TimedAudioBuffers<T> out;
-
- F const to_return = _t_to_f (time - _last_pull);
- out.audio.reset (new AudioBuffers (_buffers->channels(), to_return));
- /* And this is how many we will get from our buffer */
- F const to_return_from_buffers = min (to_return, _buffers->frames ());
-
- /* Copy the data that we have to the back end of the return buffer */
- out.audio->copy_from (_buffers.get(), to_return_from_buffers, 0, to_return - to_return_from_buffers);
- /* Silence any gap at the start */
- out.audio->make_silent (0, to_return - to_return_from_buffers);
-
- out.time = _last_pull;
- _last_pull = time;
-
- /* And remove the data we're returning from our buffers */
- if (_buffers->frames() > to_return_from_buffers) {
- _buffers->move (to_return_from_buffers, 0, _buffers->frames() - to_return_from_buffers);
- }
- _buffers->set_frames (_buffers->frames() - to_return_from_buffers);
-
- return out;
- }
-
- void
- push (boost::shared_ptr<const AudioBuffers> audio, T time)
- {
- assert (time >= _last_pull);
-
- F frame = _t_to_f (time);
- F after = max (_buffers->frames(), frame + audio->frames() - _t_to_f (_last_pull));
- _buffers->ensure_size (after);
- _buffers->accumulate_frames (audio.get(), 0, frame - _t_to_f (_last_pull), audio->frames ());
- _buffers->set_frames (after);
- }
-
- F min (F a, int b)
- {
- if (a < b) {
- return a;
- }
-
- return b;
- }
-
- F max (int a, F b)
- {
- if (a > b) {
- return a;
- }
-
- return b;
- }
-
- TimedAudioBuffers<T>
- flush ()
- {
- if (_buffers->frames() == 0) {
- return TimedAudioBuffers<T> ();
- }
-
- return TimedAudioBuffers<T> (_buffers, _last_pull);
- }
-
- void
- clear (DCPTime t)
- {
- _last_pull = t;
- _buffers.reset (new AudioBuffers (_buffers->channels(), 0));
- }