Merge branch 'master' into cairocanvas

[ardour.git] / libs / ardour / session_vst.cc

diff --git a/libs/ardour/session_vst.cc b/libs/ardour/session_vst.cc
index 59859fafbafe293a9e09fcc920e18627e423b9ae..9533eef705c866a4e4a857c06af7340804b26dfb 100644 (file)
--- a/libs/ardour/session_vst.cc
+++ b/libs/ardour/session_vst.cc
@@ -22,6 +22,7 @@
 #endif
 #include <cstdio>
 
+#include "ardour/audioengine.h"
 #include "ardour/session.h"
 #include "ardour/tempo.h"
 #include "ardour/windows_vst_plugin.h"
@@ -129,62 +130,117 @@ intptr_t Session::vst_callback (
                // <value> should contain a mask indicating which fields are required
                // (see valid masks above), as some items may require extensive
                // conversions
-               memset(&_timeInfo, 0, sizeof(_timeInfo));
-               std::cerr << "VST get time callback, value = " << std::hex << value << " index = " << index << std::dec << std::endl;
+               _timeInfo.flags = 0;
+
                if (session) {
                        framepos_t now = session->transport_frame();
 
-                       std::cerr << "\t@ " << now << std::endl;
-
                        _timeInfo.samplePos = now;
                        _timeInfo.sampleRate = session->frame_rate();
-                       _timeInfo.flags = 0;
-
+                       
                        const TempoMetric& tm (session->tempo_map().metric_at (now));
 
-//                     if (value & (kVstTempoValid)) {
+                       if (value & (kVstTempoValid)) {
                                const Tempo& t (tm.tempo());
                                _timeInfo.tempo = t.beats_per_minute ();
                                _timeInfo.flags |= (kVstTempoValid);
-//                     }
-//                     if (value & (kVstBarsValid)) {
+                       }
+                       if (value & (kVstTimeSigValid)) {
                                const Meter& m (tm.meter());
                                _timeInfo.timeSigNumerator = m.divisions_per_bar ();
                                _timeInfo.timeSigDenominator = m.note_divisor ();
                                _timeInfo.flags |= (kVstTimeSigValid);
-//                     }
-//                     if (value & (kVstPpqPosValid)) {
+                       }
+                       if ((value & (kVstPpqPosValid)) || (value & (kVstBarsValid))) {
                                Timecode::BBT_Time bbt;
+
                                try {
                                        session->tempo_map().bbt_time_rt (now, bbt);
                                        
-                                       /* Note that this assumes constant
-                                          meter/tempo throughout the session. We
-                                          can do better than this, because
-                                          progressive rock fans demand it.
+                                       /* PPQ = pulse per quarter
+                                          VST's "pulse" is our "division".
+
+                                          8 divisions per bar, 1 division = quarter, so 8 quarters per bar, ppq = 1
+                                          8 divisions per bar, 1 division = eighth, so  4 quarters per bar, ppq = 2
+                                          4 divisions per bar, 1 division = quarter, so  4 quarters per bar, ppq = 1
+                                          4 divisions per bar, 1 division = half, so 8 quarters per bar, ppq = 0.5
+                                          4 divisions per bar, 1 division = fifth, so (4 * 5/4) quarters per bar, ppq = 5/4
+                                          
+                                          general: divs_per_bar / (note_type / 4.0)
+                                       */
+                                       double ppq_scaling =  tm.meter().note_divisor() / 4.0;
+
+                                       /* Note that this assumes constant meter/tempo throughout the session. Stupid VST
                                        */
                                        double ppqBar = double(bbt.bars - 1) * tm.meter().divisions_per_bar();
                                        double ppqBeat = double(bbt.beats - 1);
                                        double ppqTick = double(bbt.ticks) / Timecode::BBT_Time::ticks_per_beat;
-                                       // PPQ Pos
-                                       _timeInfo.ppqPos = ppqBar + ppqBeat + ppqTick;
-                                       _timeInfo.flags |= (kVstPpqPosValid);
+
+                                       ppqBar *= ppq_scaling;
+                                       ppqBeat *= ppq_scaling;
+                                       ppqTick *= ppq_scaling;
+                                       
+                                       if (value & (kVstPpqPosValid)) {
+                                               _timeInfo.ppqPos = ppqBar + ppqBeat + ppqTick;
+                                               _timeInfo.flags |= (kVstPpqPosValid);
+                                       }
+                                       
+                                       if (value & (kVstBarsValid)) {
+                                               _timeInfo.barStartPos = ppqBar;
+                                               _timeInfo.flags |= (kVstPpqPosValid);
+                                       }
+                                       
                                } catch (...) {
                                        /* relax */
                                }
-//                     }
+                       }
 
-                       // Bars
-                       // _timeInfo.barStartPos = ppqBar;
-                       // _timeInfo.flags |= kVstBarsValid;
+                       if (value & (kVstSmpteValid)) {
+                               Timecode::Time t;
+                               
+                               session->timecode_time (now, t);
+                               
+                               _timeInfo.smpteOffset = (t.hours * t.rate * 60.0 * 60.0) + 
+                                       (t.minutes * t.rate * 60.0) + 
+                                       (t.seconds * t.rate) + 
+                                       (t.frames) + 
+                                       (t.subframes);
+
+                               _timeInfo.smpteOffset *= 80.0; /* VST spec is 1/80th frames */
+
+                               if (session->timecode_drop_frames()) {
+                                       if (session->timecode_frames_per_second() == 30.0) {
+                                               _timeInfo.smpteFrameRate = 5;
+                                       } else {
+                                               _timeInfo.smpteFrameRate = 4; /* 29.97 assumed, thanks VST */
+                                       }
+                               } else {
+                                       if (session->timecode_frames_per_second() == 24.0) {
+                                               _timeInfo.smpteFrameRate = 0;
+                                       } else if (session->timecode_frames_per_second() == 24.975) {
+                                               _timeInfo.smpteFrameRate = 2;
+                                       } else if (session->timecode_frames_per_second() == 25.0) {
+                                               _timeInfo.smpteFrameRate = 1;
+                                       } else {
+                                               _timeInfo.smpteFrameRate = 3; /* 30 fps */
+                                       }
+                               }
+                               _timeInfo.flags |= (kVstSmpteValid);
+                       }
 
                        if (session->transport_speed() != 0.0f) {
-                               _timeInfo.flags |= kVstTransportPlaying;
+                               _timeInfo.flags |= (kVstTransportPlaying);
                        }
-               }
 
-               std::cerr << "\ttimeinfo valid = " << std::hex << _timeInfo.flags << std::dec << std::endl;
-               return (long)&_timeInfo;
+                       if (session->get_play_loop()) {
+                       }
+
+               } else {
+                       _timeInfo.samplePos = 0;
+                       _timeInfo.sampleRate = AudioEngine::instance()->sample_rate();
+               }
+               
+               return (intptr_t) &_timeInfo;
 
        case audioMasterProcessEvents:
                SHOW_CALLBACK ("amc: audioMasterProcessEvents\n");