implement VST midi-output
[ardour.git] / libs / ardour / session_vst.cc
index 86b541f4672d36fbfa648e184e1f5ad6bd0ff18b..845293de7caf084c2284b16111cb67736173438f 100644 (file)
 
 */
 
+#ifndef COMPILER_MSVC
 #include <stdbool.h>
+#endif
 #include <cstdio>
 
-#include <fst.h>
-#include <vst/aeffectx.h>
-
+#include "ardour/audioengine.h"
 #include "ardour/session.h"
-#include "ardour/vst_plugin.h"
+#include "ardour/tempo.h"
+#include "ardour/windows_vst_plugin.h"
+#include "ardour/vestige/aeffectx.h"
+#include "ardour/vst_types.h"
+#ifdef WINDOWS_VST_SUPPORT
+#include <fst.h>
+#endif
 
 #include "i18n.h"
 
-// #define DEBUG_CALLBACKS
+#define DEBUG_CALLBACKS
+static int debug_callbacks = -1;
 
 #ifdef DEBUG_CALLBACKS
-#define SHOW_CALLBACK printf
+#define SHOW_CALLBACK if (debug_callbacks) printf
 #else
 #define SHOW_CALLBACK(...)
 #endif
 
 using namespace ARDOUR;
 
-long Session::vst_callback (AEffect* effect,
-                           long opcode,
-                           long index,
-                           long value,
-                           void* ptr,
-                           float opt)
+int Session::vst_current_loading_id = 0;
+const char* Session::vst_can_do_strings[] = {
+       X_("supplyIdle"),
+       X_("sendVstTimeInfo"),
+       X_("sendVstEvents"),
+       X_("sendVstMidiEvent"),
+       X_("supportShell"),
+       X_("shellCategory")
+};
+const int Session::vst_can_do_string_count = sizeof (vst_can_do_strings) / sizeof (char*);
+
+intptr_t Session::vst_callback (
+       AEffect* effect,
+       int32_t opcode,
+       int32_t index,
+       intptr_t value,
+       void* ptr,
+       float opt
+       )
 {
        static VstTimeInfo _timeInfo;
        VSTPlugin* plug;
        Session* session;
 
-       SHOW_CALLBACK ("am callback, opcode = %d", opcode);
-       
+       if (debug_callbacks < 0) {
+               debug_callbacks = (getenv ("ARDOUR_DEBUG_VST_CALLBACKS") != 0);
+       }
+
        if (effect && effect->user) {
-               plug = (VSTPlugin*) (effect->user);
+               plug = (VSTPlugin *) (effect->user);
                session = &plug->session();
+#ifdef COMPILER_MSVC
+               SHOW_CALLBACK ("am callback 0x%x, opcode = %d, plugin = \"%s\" ", (int) pthread_self().p, opcode, plug->name());
+#else
+               SHOW_CALLBACK ("am callback 0x%x, opcode = %d, plugin = \"%s\" ", (int) pthread_self(), opcode, plug->name());
+#endif
        } else {
                plug = 0;
                session = 0;
+#ifdef COMPILER_MSVC
+               SHOW_CALLBACK ("am callback 0x%x, opcode = %d", (int) pthread_self().p, opcode);
+#else
+               SHOW_CALLBACK ("am callback 0x%x, opcode = %d", (int) pthread_self(), opcode);
+#endif
        }
 
        switch(opcode){
@@ -64,32 +96,32 @@ long Session::vst_callback (AEffect* effect,
        case audioMasterAutomate:
                SHOW_CALLBACK ("amc: audioMasterAutomate\n");
                // index, value, returns 0
-               if (effect) {
-                       effect->setParameter (effect, index, opt);
+               if (plug) {
+                       plug->set_parameter (index, opt);
                }
                return 0;
 
        case audioMasterVersion:
                SHOW_CALLBACK ("amc: audioMasterVersion\n");
                // vst version, currently 2 (0 for older)
-               return 2;
+               return 2400;
 
-       case audioMasterCurrentId:      
+       case audioMasterCurrentId:
                SHOW_CALLBACK ("amc: audioMasterCurrentId\n");
-               // returns the unique id of a plug that's currently
-               // loading
-               return 0;
-               
+               // returns the unique id of a plug that's currently loading
+               return vst_current_loading_id;
+
        case audioMasterIdle:
                SHOW_CALLBACK ("amc: audioMasterIdle\n");
-               // call application idle routine (this will
-               // call effEditIdle for all open editors too) 
+#ifdef WINDOWS_VST_SUPPORT
+               fst_audio_master_idle();
+#endif
                if (effect) {
                        effect->dispatcher(effect, effEditIdle, 0, 0, NULL, 0.0f);
                }
                return 0;
 
-       case audioMasterPinConnected:           
+       case audioMasterPinConnected:
                SHOW_CALLBACK ("amc: audioMasterPinConnected\n");
                // inquire if an input or output is beeing connected;
                // index enumerates input or output counting from zero:
@@ -101,6 +133,9 @@ long Session::vst_callback (AEffect* effect,
        case audioMasterWantMidi:
                SHOW_CALLBACK ("amc: audioMasterWantMidi\n");
                // <value> is a filter which is currently ignored
+               if (plug) {
+                       plug->get_info()->n_inputs.set_midi (1);
+               }
                return 0;
 
        case audioMasterGetTime:
@@ -109,16 +144,129 @@ long Session::vst_callback (AEffect* effect,
                // <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));
+               _timeInfo.flags = 0;
+
                if (session) {
-                       _timeInfo.samplePos = session->transport_frame();
+                       framepos_t now = session->transport_frame();
+
+                       _timeInfo.samplePos = now;
                        _timeInfo.sampleRate = session->frame_rate();
+
+                       const TempoMetric& tm (session->tempo_map().metric_at (now));
+
+                       if (value & (kVstTempoValid)) {
+                               const Tempo& t (tm.tempo());
+                               _timeInfo.tempo = t.beats_per_minute ();
+                               _timeInfo.flags |= (kVstTempoValid);
+                       }
+                       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)) || (value & (kVstBarsValid))) {
+                               Timecode::BBT_Time bbt;
+
+                               try {
+                                       session->tempo_map().bbt_time_rt (now, bbt);
+
+                                       /* 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;
+
+                                       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 |= (kVstBarsValid);
+                                       }
+
+                               } catch (...) {
+                                       /* relax */
+                               }
+                       }
+
+                       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);
+                       }
+
+                       if (session->get_play_loop()) {
+                       }
+
+               } else {
+                       _timeInfo.samplePos = 0;
+                       _timeInfo.sampleRate = AudioEngine::instance()->sample_rate();
                }
-               return (long)&_timeInfo;
+
+               return (intptr_t) &_timeInfo;
 
        case audioMasterProcessEvents:
                SHOW_CALLBACK ("amc: audioMasterProcessEvents\n");
                // VstEvents* in <ptr>
+               if (plug->midi_buffer()) {
+                       VstEvents* v = (VstEvents*)ptr;
+                       for (int n = 0 ; n < v->numEvents; ++n) {
+                               VstMidiEvent *vme = (VstMidiEvent*) (v->events[n]->dump);
+                               if (vme->type == kVstMidiType) {
+                                       plug->midi_buffer()->push_back(vme->deltaFrames, 3, (uint8_t*)vme->midiData);
+                               }
+                       }
+               }
                return 0;
 
        case audioMasterSetTime:
@@ -128,27 +276,36 @@ long Session::vst_callback (AEffect* effect,
        case audioMasterTempoAt:
                SHOW_CALLBACK ("amc: audioMasterTempoAt\n");
                // returns tempo (in bpm * 10000) at sample frame location passed in <value>
-               return 0;
+               if (session) {
+                       const Tempo& t (session->tempo_map().tempo_at (value));
+                       return t.beats_per_minute() * 1000;
+               } else {
+                       return 0;
+               }
+               break;
 
        case audioMasterGetNumAutomatableParameters:
                SHOW_CALLBACK ("amc: audioMasterGetNumAutomatableParameters\n");
                return 0;
 
-       case audioMasterGetParameterQuantization:       
+       case audioMasterGetParameterQuantization:
                SHOW_CALLBACK ("amc: audioMasterGetParameterQuantization\n");
-               // returns the integer value for +1.0 representation,
-              // or 1 if full single float precision is maintained
-               // in automation. parameter index in <value> (-1: all, any)
+               // returns the integer value for +1.0 representation,
+               // or 1 if full single float precision is maintained
+               // in automation. parameter index in <value> (-1: all, any)
                return 0;
 
        case audioMasterIOChanged:
                SHOW_CALLBACK ("amc: audioMasterIOChanged\n");
-              // numInputs and/or numOutputs has changed
+               // numInputs and/or numOutputs has changed
                return 0;
 
        case audioMasterNeedIdle:
                SHOW_CALLBACK ("amc: audioMasterNeedIdle\n");
-              // plug needs idle calls (outside its editor window)
+               // plug needs idle calls (outside its editor window)
+               if (plug) {
+                       plug->state()->wantIdle = 1;
+               }
                return 0;
 
        case audioMasterSizeWindow:
@@ -158,10 +315,16 @@ long Session::vst_callback (AEffect* effect,
 
        case audioMasterGetSampleRate:
                SHOW_CALLBACK ("amc: audioMasterGetSampleRate\n");
+               if (session) {
+                       return session->frame_rate();
+               }
                return 0;
 
        case audioMasterGetBlockSize:
                SHOW_CALLBACK ("amc: audioMasterGetBlockSize\n");
+               if (session) {
+                       return session->get_block_size();
+               }
                return 0;
 
        case audioMasterGetInputLatency:
@@ -174,16 +337,16 @@ long Session::vst_callback (AEffect* effect,
 
        case audioMasterGetPreviousPlug:
                SHOW_CALLBACK ("amc: audioMasterGetPreviousPlug\n");
-              // input pin in <value> (-1: first to come), returns cEffect*
+               // input pin in <value> (-1: first to come), returns cEffect*
                return 0;
 
        case audioMasterGetNextPlug:
                SHOW_CALLBACK ("amc: audioMasterGetNextPlug\n");
-              // output pin in <value> (-1: first to come), returns cEffect*
+               // output pin in <value> (-1: first to come), returns cEffect*
 
        case audioMasterWillReplaceOrAccumulate:
                SHOW_CALLBACK ("amc: audioMasterWillReplaceOrAccumulate\n");
-              // returns: 0: not supported, 1: replace, 2: accumulate
+               // returns: 0: not supported, 1: replace, 2: accumulate
                return 0;
 
        case audioMasterGetCurrentProcessLevel:
@@ -195,7 +358,7 @@ long Session::vst_callback (AEffect* effect,
                // 4: currently offline processing and thus in user thread
                // other: not defined, but probably pre-empting user thread.
                return 0;
-               
+
        case audioMasterGetAutomationState:
                SHOW_CALLBACK ("amc: audioMasterGetAutomationState\n");
                // returns 0: not supported, 1: off, 2:read, 3:write, 4:read/write
@@ -204,9 +367,11 @@ long Session::vst_callback (AEffect* effect,
 
        case audioMasterOfflineStart:
                SHOW_CALLBACK ("amc: audioMasterOfflineStart\n");
+               return 0;
+
        case audioMasterOfflineRead:
                SHOW_CALLBACK ("amc: audioMasterOfflineRead\n");
-              // ptr points to offline structure, see below. return 0: error, 1 ok
+               // ptr points to offline structure, see below. return 0: error, 1 ok
                return 0;
 
        case audioMasterOfflineWrite:
@@ -216,6 +381,8 @@ long Session::vst_callback (AEffect* effect,
 
        case audioMasterOfflineGetCurrentPass:
                SHOW_CALLBACK ("amc: audioMasterOfflineGetCurrentPass\n");
+               return 0;
+
        case audioMasterOfflineGetCurrentMetaPass:
                SHOW_CALLBACK ("amc: audioMasterOfflineGetCurrentMetaPass\n");
                return 0;
@@ -239,49 +406,54 @@ long Session::vst_callback (AEffect* effect,
        case audioMasterGetProductString:
                SHOW_CALLBACK ("amc: audioMasterGetProductString\n");
                // fills <ptr> with a string with product name (max 64 char)
-               strcpy ((char*) ptr, "Ardour");
+               strcpy ((char*) ptr, PROGRAM_NAME);
                return 0;
 
        case audioMasterGetVendorVersion:
                SHOW_CALLBACK ("amc: audioMasterGetVendorVersion\n");
                // returns vendor-specific version
                return 900;
-               
+
        case audioMasterVendorSpecific:
                SHOW_CALLBACK ("amc: audioMasterVendorSpecific\n");
                // no definition, vendor specific handling
                return 0;
-               
+
        case audioMasterSetIcon:
                SHOW_CALLBACK ("amc: audioMasterSetIcon\n");
                // void* in <ptr>, format not defined yet
                return 0;
-               
+
        case audioMasterCanDo:
                SHOW_CALLBACK ("amc: audioMasterCanDo\n");
-               // string in ptr, see below
+               // string in ptr,  (const char*)ptr
+               for (int i = 0; i < vst_can_do_string_count; i++) {
+                       if (! strcmp(vst_can_do_strings[i], (const char*)ptr)) {
+                               return 1;
+                       }
+               }
                return 0;
-               
+
        case audioMasterGetLanguage:
                SHOW_CALLBACK ("amc: audioMasterGetLanguage\n");
                // see enum
                return 0;
-               
+
        case audioMasterOpenWindow:
                SHOW_CALLBACK ("amc: audioMasterOpenWindow\n");
                // returns platform specific ptr
                return 0;
-               
+
        case audioMasterCloseWindow:
                SHOW_CALLBACK ("amc: audioMasterCloseWindow\n");
                // close window, platform specific handle in <ptr>
                return 0;
-               
+
        case audioMasterGetDirectory:
                SHOW_CALLBACK ("amc: audioMasterGetDirectory\n");
                // get plug directory, FSSpec on MAC, else char*
                return 0;
-               
+
        case audioMasterUpdateDisplay:
                SHOW_CALLBACK ("amc: audioMasterUpdateDisplay\n");
                // something has changed, update 'multi-fx' display
@@ -289,27 +461,27 @@ long Session::vst_callback (AEffect* effect,
                        effect->dispatcher(effect, effEditIdle, 0, 0, NULL, 0.0f);
                }
                return 0;
-               
+
        case audioMasterBeginEdit:
                SHOW_CALLBACK ("amc: audioMasterBeginEdit\n");
                // begin of automation session (when mouse down), parameter index in <index>
                return 0;
-               
+
        case audioMasterEndEdit:
                SHOW_CALLBACK ("amc: audioMasterEndEdit\n");
                // end of automation session (when mouse up),     parameter index in <index>
                return 0;
-               
+
        case audioMasterOpenFileSelector:
                SHOW_CALLBACK ("amc: audioMasterOpenFileSelector\n");
                // open a fileselector window with VstFileSelect* in <ptr>
                return 0;
-               
+
        default:
-               SHOW_CALLBACK ("VST master dispatcher: undefed: %d, %d\n", opcode, effKeysRequired);
+               SHOW_CALLBACK ("VST master dispatcher: undefed: %d\n", opcode);
                break;
-       }       
-       
+       }
+
        return 0;
 }