triggerbox: handle tempo map changes better inside and around MIDI triggers
We now try to get to the right location within the MIDI data and continue playing, rather than pretending that we reached the end. This also fixes a thinko that caused only the first few notes of a MIDI trigger to play. This may also solve cases where due to length, sample rate and tempo settings, a trigger finished precisely on a ::run() call boundary.
This commit is contained in:
parent
4f7c1aba24
commit
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@ -267,6 +267,8 @@ class LIBARDOUR_API Trigger : public PBD::Stateful {
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*/
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void request_stop ();
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virtual void tempo_map_changed() {}
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virtual pframes_t run (BufferSet&, samplepos_t start_sample, samplepos_t end_sample,
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Temporal::Beats const & start, Temporal::Beats const & end,
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pframes_t nframes, pframes_t offset, double bpm, pframes_t& quantize_offset) = 0;
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@ -316,6 +318,7 @@ class LIBARDOUR_API Trigger : public PBD::Stateful {
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*/
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samplepos_t transition_samples;
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Temporal::Beats transition_beats;
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Temporal::BBT_Time _transition_bbt;
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XMLNode& get_state () const;
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int set_state (const XMLNode&, int version);
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@ -573,6 +576,7 @@ class LIBARDOUR_API MIDITrigger : public Trigger {
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void reload (BufferSet&, void*);
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bool probably_oneshot () const;
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void tempo_map_changed();
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void estimate_midi_patches ();
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int set_region_in_worker_thread (boost::shared_ptr<Region>);
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@ -619,12 +623,14 @@ class LIBARDOUR_API MIDITrigger : public Trigger {
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Temporal::DoubleableBeats data_length; /* using timestamps from data */
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Temporal::DoubleableBeats last_event_beats;
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samplepos_t last_event_samples;
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Temporal::BBT_Offset _start_offset;
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Temporal::BBT_Offset _legato_offset;
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boost::shared_ptr<MidiModel> model;
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MidiModel::const_iterator iter;
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bool map_change;
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int load_data (boost::shared_ptr<MidiRegion>);
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void compute_and_set_length ();
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@ -775,6 +781,8 @@ class LIBARDOUR_API TriggerBox : public Processor
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void enqueue_trigger_state_for_region (boost::shared_ptr<Region>, boost::shared_ptr<Trigger::UIState>);
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void tempo_map_changed ();
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/* valid only within the ::run() call tree */
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int32_t active_scene() const { return _active_scene; }
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@ -896,6 +904,7 @@ class LIBARDOUR_API TriggerBox : public Processor
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void cancel_locate_armed ();
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void fast_forward_nothing_to_do ();
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int handle_stopped_trigger (BufferSet& bufs, pframes_t dest_offset);
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PBD::ScopedConnection stop_all_connection;
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@ -1132,7 +1132,7 @@ Trigger::when_stopped_during_run (BufferSet& bufs, pframes_t dest_offset)
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/* have played the specified number of times, we're done */
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 loop cnt %2 satisfied, now stopped\n", index(), _follow_count));
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 loop cnt %2 satisfied, now stopped with ls %3\n", index(), _follow_count, enum_2_string (launch_style())));
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shutdown (bufs, dest_offset);
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@ -1486,6 +1486,8 @@ AudioTrigger::compute_end (Temporal::TempoMap::SharedPtr const & tmap, Temporal:
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effective_length = tmap->quarters_at_sample (transition_sample + final_processed_sample) - tmap->quarters_at_sample (transition_sample);
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_transition_bbt = transition_bbt;
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1: final sample %2 vs ees %3 ls %4\n", index(), final_processed_sample, expected_end_sample, last_readable_sample));
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return timepos_t (expected_end_sample);
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@ -2128,8 +2130,10 @@ MIDITrigger::MIDITrigger (uint32_t n, TriggerBox& b)
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: Trigger (n, b)
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, data_length (Temporal::Beats())
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, last_event_beats (Temporal::Beats())
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, last_event_samples (0)
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, _start_offset (0, 0, 0)
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, _legato_offset (0, 0, 0)
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, map_change (false)
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{
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_channel_map.assign (16, -1);
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}
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@ -2643,6 +2647,7 @@ MIDITrigger::retrigger ()
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iter = model->begin();
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_legato_offset = Temporal::BBT_Offset ();
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last_event_beats = Temporal::Beats();
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last_event_samples = 0;
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 retriggered to %2, ts = %3\n", _index, iter->time(), transition_beats));
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}
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@ -2651,6 +2656,47 @@ MIDITrigger::reload (BufferSet&, void*)
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{
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}
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void
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MIDITrigger::tempo_map_changed ()
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{
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/* called from process context, but before Session::process(), and only
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* on an active trigger.
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*/
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iter = model->begin();
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Temporal::TempoMap::SharedPtr tmap (Temporal::TempoMap::use());
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const timepos_t region_start_time = _region->start();
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const Temporal::Beats region_start = region_start_time.beats();
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while (iter != model->end()) {
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/* Find the first event whose sample time is equal-to or
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* greater than the last played event sample. That is the
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* event we wish to use next, after the tempo map change.
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*
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* Note that the sample time is being computed with the *new*
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* tempo map, while last_event_samples we computed with the old
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* one.
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*/
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const Temporal::Beats iter_timeline_beats = transition_beats + ((*iter).time() - region_start);
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samplepos_t iter_timeline_samples = tmap->sample_at (iter_timeline_beats);
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if (iter_timeline_samples >= last_event_samples) {
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break;
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}
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++iter;
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}
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if (iter != model->end()) {
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Temporal::Beats elen_ignored;
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(void) compute_end (tmap, _transition_bbt, transition_samples, elen_ignored);
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}
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map_change = true;
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}
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template<bool in_process_context>
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pframes_t
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MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample,
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@ -2662,7 +2708,8 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
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const timepos_t region_start_time = _region->start();
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const Temporal::Beats region_start = region_start_time.beats();
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Temporal::TempoMap::SharedPtr tmap (Temporal::TempoMap::use());
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DEBUG_RESULT (samplepos_t, last_event_samples, max_samplepos);
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last_event_samples = end_sample;
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/* see if we're going to start or stop or retrigger in this run() call */
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quantize_offset = 0;
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@ -2695,45 +2742,83 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
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* which we last transitioned (in this case, to being active)
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*/
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const Temporal::Beats maybe_last_event_timeline_beats = transition_beats + (event.time() - region_start);
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Temporal::Beats maybe_last_event_timeline_beats = transition_beats + (event.time() - region_start);
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/* check that the event is within the bounds for this run() call */
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if (maybe_last_event_timeline_beats < start_beats) {
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break;
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}
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if (maybe_last_event_timeline_beats > final_beat) {
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/* do this to "fake" having reached the end */
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 tlrr %2 >= fb %3, so at end with %4\n", index(), maybe_last_event_timeline_beats, final_beat, event));
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iter = model->end();
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break;
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} else if (maybe_last_event_timeline_beats < start_beats) {
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/* something made iter incorrect, maybe tempo map
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change. Pretend that we reached the end
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*/
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 tlrr %2 < sb %3, so at end with %4\n", index(), maybe_last_event_timeline_beats, start_beats, event));
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iter = model->end();
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break;
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}
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/* Now get samples */
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if (maybe_last_event_timeline_beats >= end_beats) {
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break;
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}
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/* Now get the sample position of the event, on the timeline */
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const samplepos_t timeline_samples = tmap->sample_at (maybe_last_event_timeline_beats);
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if (timeline_samples >= end_sample || timeline_samples < start_sample) {
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/* we should not get here but if we do, pretend we reached the end */
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iter = model->end();
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break;
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}
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if (in_process_context) { /* compile-time const expr */
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/* Now we have to convert to a position within the buffer we
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* are writing to.
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*
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* (timeline_samples - start_sample) gives us the
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* sample offset from the start of our run() call. But
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* since we may be executing after another trigger in
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* the same process() cycle, we must take dest_offset
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* into account to get an actual buffer position.
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*/
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samplepos_t buffer_samples;
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/* HACK time: in the argument list, we have
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start_sample, end_sample: computed from Session::process()
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adjusted by latency
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start_beats, end_beats: computed from the above two
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sample values, using the tempo map.
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When we compute the buffer/sample offset for event, we are
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converting from beats to samples, the opposite direction of
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the computation of start/end_beats from
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start/end_sample.
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These conversions are not reversible (the precision
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of audio time exceeds that of music time). As a
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result, we may end up in a situation where the beat
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position of the event confirms that it is to be
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delivered within this ::run() call, but the sample
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value says that it was to be delivered in the
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previous call. As an example, given some tempo map
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parameters, start_sample 6160 converts to 0:536, but
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event time 0:536 converts to 6156 (earlier by 4
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samples).
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We consider the beat position to be "more canonical"
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than the sample position, and so if this happens,
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treat the event as occuring at start_sample, not
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before it.
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Note that before this test, we've already
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established that the event time in beats is within range.
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*/
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if (timeline_samples < start_sample) {
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buffer_samples = dest_offset;
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} else {
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/* (timeline_samples - start_sample) gives us the
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* sample offset from the start of our run() call. But
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* since we may be executing after another trigger in
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* the same process() cycle, we must take dest_offset
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* into account to get an actual buffer position.
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*/
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buffer_samples = (timeline_samples - start_sample) + dest_offset;
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}
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samplepos_t buffer_samples = (timeline_samples - start_sample) + dest_offset;
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assert (buffer_samples >= 0);
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Evoral::Event<MidiBuffer::TimeType> ev (Evoral::MIDI_EVENT, buffer_samples, event.size(), const_cast<uint8_t*>(event.buffer()), false);
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@ -2776,7 +2861,6 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
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last_event_beats = event.time();
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last_event_timeline_beats = maybe_last_event_timeline_beats;
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DEBUG_ASSIGN (last_event_samples, timeline_samples);
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++iter;
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}
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@ -2817,16 +2901,34 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
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} else {
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/* finishing up playout */
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samplepos_t final_processed_sample = tmap->sample_at (timepos_t (final_beat));
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nframes = orig_nframes - (final_processed_sample - start_sample);
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_loop_cnt++;
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_state = Stopped;
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if (map_change) {
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if ((start_sample > final_processed_sample) || (final_processed_sample - start_sample > orig_nframes)) {
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nframes = 0;
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_loop_cnt++;
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_state = Stopping;
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} else {
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nframes = orig_nframes - (final_processed_sample - start_sample);
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}
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} else {
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nframes = orig_nframes - (final_processed_sample - start_sample);
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_loop_cnt++;
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_state = Stopped;
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}
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 playout done, nf = %2 fb %3 fs %4 %5 LC %6\n", index(), nframes, final_beat, final_processed_sample, start_sample, _loop_cnt));
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}
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} else {
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samplepos_t final_processed_sample = tmap->sample_at (timepos_t (final_beat));
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nframes = orig_nframes - (final_processed_sample - start_sample);
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const samplepos_t final_processed_sample = tmap->sample_at (timepos_t (final_beat));
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const samplecnt_t nproc = (final_processed_sample - start_sample);
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if (nproc > orig_nframes) {
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/* tempo map changed, probably */
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nframes = nproc > orig_nframes ? 0 : orig_nframes - nproc;
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} else {
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nframes = orig_nframes - nproc;
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}
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_loop_cnt++;
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_state = Stopped;
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 reached final event, now stopped, nf = %2 fb %3 fs %4 %5 LC %6\n", index(), nframes, final_beat, final_processed_sample, start_sample, _loop_cnt));
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@ -2840,14 +2942,18 @@ MIDITrigger::midi_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t en
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nframes = 0;
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}
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const samplecnt_t covered_frames = orig_nframes - nframes;
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/* tempo map changes could lead to nframes > orig_nframes */
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const samplecnt_t covered_frames = nframes > orig_nframes ? orig_nframes : orig_nframes - nframes;
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if (_state == Stopped || _state == Stopping) {
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when_stopped_during_run (bufs, dest_offset + covered_frames);
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when_stopped_during_run (bufs, (dest_offset + covered_frames) ? (dest_offset + covered_frames - 1) : 0);
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}
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process_index += covered_frames;
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map_change = false;
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return covered_frames;
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}
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@ -3169,15 +3275,20 @@ TriggerBox::fast_forward (CueEvents const & cues, samplepos_t transport_position
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if (start_samples < transport_position) {
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samplepos_t s = start_samples;
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BBT_Time ns = start_bbt;
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const BBT_Offset step (0, effective_length.get_beats(), effective_length.get_ticks());
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do {
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start_samples = s;
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ns = tmap->bbt_walk (ns, BBT_Offset (0, effective_length.get_beats(), effective_length.get_ticks()));
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ns = tmap->bbt_walk (ns, step);
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s = tmap->sample_at (ns);
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} while (s < transport_position);
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1: roll trigger %2 from %3 to %4 with cnt = %5\n", order(), trig->index(), start_samples, transport_position, cnt));
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if (boost::dynamic_pointer_cast<MIDITrigger> (trig)) {
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boost::dynamic_pointer_cast<MIDITrigger> (trig)->_transition_bbt = ns;
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}
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trig->start_and_roll_to (start_samples, transport_position, cnt);
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_currently_playing = trig;
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@ -3765,6 +3876,39 @@ TriggerBox::begin_process_cycle ()
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}
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int
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TriggerBox::handle_stopped_trigger (BufferSet& bufs, pframes_t dest_offset)
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{
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if (_currently_playing->will_follow()) {
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int n = determine_next_trigger (_currently_playing->index());
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Temporal::BBT_Offset start_quantization;
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if (n < 0) {
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 finished, no next trigger\n", _currently_playing->name()));
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_currently_playing = 0;
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PropertyChanged (Properties::currently_playing);
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return 1; /* no triggers to come next, break out of nframes loop */
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}
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if ((int) _currently_playing->index() == n) {
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start_quantization = Temporal::BBT_Offset ();
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("switching to next trigger %1, will use start immediately \n", all_triggers[n]->name()));
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} else {
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("switching to next trigger %1\n", all_triggers[n]->name()));
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}
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_currently_playing = all_triggers[n];
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_currently_playing->startup (bufs, dest_offset, start_quantization);
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PropertyChanged (Properties::currently_playing);
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} else {
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_currently_playing = 0;
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PropertyChanged (Properties::currently_playing);
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DEBUG_TRACE (DEBUG::Triggers, "currently playing was stopped, but stop_all was set, leaving nf loop\n");
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/* leave nframes loop */
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return 1;
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}
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return 0;
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}
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void
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TriggerBox::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double speed, pframes_t nframes, bool result_required)
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{
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@ -4097,34 +4241,9 @@ TriggerBox::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_samp
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*/
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if (_currently_playing->state() == Trigger::Stopped) {
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if (!_stop_all && !_currently_playing->explicitly_stopped()) {
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 has stopped, need next...\n", _currently_playing->name()));
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if (_currently_playing->will_follow()) {
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int n = determine_next_trigger (_currently_playing->index());
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Temporal::BBT_Offset start_quantization;
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if (n < 0) {
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("%1 finished, no next trigger\n", _currently_playing->name()));
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_currently_playing = 0;
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PropertyChanged (Properties::currently_playing);
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break; /* no triggers to come next, break out of nframes loop */
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}
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if ((int) _currently_playing->index() == n) {
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start_quantization = Temporal::BBT_Offset ();
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("switching to next trigger %1, will use start immediately \n", all_triggers[n]->name()));
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} else {
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DEBUG_TRACE (DEBUG::Triggers, string_compose ("switching to next trigger %1\n", all_triggers[n]->name()));
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}
|
||||
_currently_playing = all_triggers[n];
|
||||
_currently_playing->startup (bufs, dest_offset, start_quantization);
|
||||
PropertyChanged (Properties::currently_playing);
|
||||
} else {
|
||||
_currently_playing = 0;
|
||||
PropertyChanged (Properties::currently_playing);
|
||||
DEBUG_TRACE (DEBUG::Triggers, "currently playing was stopped, but stop_all was set, leaving nf loop\n");
|
||||
/* leave nframes loop */
|
||||
if (handle_stopped_trigger (bufs, dest_offset)) {
|
||||
break;
|
||||
}
|
||||
|
||||
@ -4170,6 +4289,17 @@ TriggerBox::run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_samp
|
||||
DEBUG_TRACE (DEBUG::Triggers, string_compose ("trig %1 ran, covered %2 state now %3 nframes now %4\n",
|
||||
_currently_playing->name(), frames_covered, enum_2_string (_currently_playing->state()), nframes));
|
||||
|
||||
/* it is possible that the current trigger stopped right on our
|
||||
* run() call boundary. If so, be sure to notice because
|
||||
* otherwise we were already set to break from this
|
||||
* nframes-testing while loop; _currently_playing
|
||||
* will still be set, and we will never progress on subsequent
|
||||
* calls to ::run()
|
||||
*/
|
||||
|
||||
if (nframes == 0 && _currently_playing->state() == Trigger::Stopped) {
|
||||
(void) handle_stopped_trigger (bufs, dest_offset);
|
||||
}
|
||||
}
|
||||
|
||||
if (!_currently_playing) {
|
||||
@ -4541,6 +4671,16 @@ TriggerBox::non_realtime_locate (samplepos_t now)
|
||||
fast_forward (_session.cue_events(), now);
|
||||
}
|
||||
|
||||
void
|
||||
TriggerBox::tempo_map_changed ()
|
||||
{
|
||||
/* called from process context, but before Session::process() */
|
||||
|
||||
if (_currently_playing) {
|
||||
_currently_playing->tempo_map_changed ();
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
TriggerBox::dump (std::ostream & ostr) const
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user