+
+pair<shared_ptr<AudioBuffers>, DCPTime>
+Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
+{
+ DCPTime const discard_time = discard_to - time;
+ Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
+ Frame remaining_frames = audio->frames() - discard_frames;
+ if (remaining_frames <= 0) {
+ return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
+ }
+ shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
+ cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
+ return make_pair(cut, time + discard_time);
+}
+
+void
+Player::set_dcp_decode_reduction (optional<int> reduction)
+{
+ if (reduction == _dcp_decode_reduction) {
+ return;
+ }
+
+ _dcp_decode_reduction = reduction;
+ _have_valid_pieces = false;
+ Changed (false);
+}