+ /* TODO optimize
+ * - when speed == 1.0, the resampler copies data without processing
+ * it may (or may not) be more efficient to just run all in sequence.
+ *
+ * - single sequential task for 'lightweight' tasks would make sense
+ * (run it in parallel with 'heavy' resampling.
+ * * output ports (sends_output()) only set a flag
+ * * midi-ports only scale event timestamps
+ *
+ * - a threshold parallel vs searial processing may be appropriate.
+ * amount of work (how many connected ports are there, how
+ * many resamplers need to run) vs. available CPU cores and semaphore
+ * synchronization overhead.
+ *
+ * - input ports: it would make sense to resample each input only once
+ * (rather than resample into each ardour-owned input port).
+ * A single external source-port may be connected to many ardour
+ * input-ports. Currently re-sampling is per input.
+ */
+ if (s && s->rt_tasklist () && fabs (Port::speed_ratio ()) != 1.0) {
+ RTTaskList::TaskList tl;
+ for (Ports::iterator p = _cycle_ports->begin(); p != _cycle_ports->end(); ++p) {
+ tl.push_back (boost::bind (&Port::cycle_start, p->second, nframes));
+ }
+ s->rt_tasklist()->process (tl);
+ } else {
+ for (Ports::iterator p = _cycle_ports->begin(); p != _cycle_ports->end(); ++p) {
+ p->second->cycle_start (nframes);
+ }