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Proper MIDI implementation for VST3, sort input events ourselves 

Signed-off-by: falkTX <falktx@falktx.com>
pull/321/head
falkTX 2 years ago
parent
314c814ce1
commit
93abcc869b
Signed by: falkTX <falktx@falktx.com> GPG Key ID: CDBAA37ABC74FBA0
1 changed files with 320 additions and 105 deletions
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  1. +320
    -105
      distrho/src/DistrhoPluginVST3.cpp

+ 320
- 105
distrho/src/DistrhoPluginVST3.cpp View File

@@ -42,7 +42,6 @@
* - have parameter outputs host-provided UI working in at least 1 host
* - parameter groups via unit ids
* - test parameter changes from DSP (aka requestParameterValueChange)
* - test receiving midi CC
* - implement getParameterNormalized/setParameterNormalized for MIDI CC params ?
* - fully implemented parameter stuff and verify
* - float to int safe casting
@@ -51,7 +50,6 @@
* - MIDI CC changes (need to store value to give to the host?)
* - MIDI program changes
* - MIDI sysex
* - append MIDI input events in a sorted way
* == BUSES
* - bus arrangements
* - optional audio buses
@@ -249,6 +247,288 @@ class PluginVst3
numCV(0) {}
} inputBuses, outputBuses;

#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
/* handy class for storing and sorting events and MIDI CC parameters
* only stores events for which a MIDI conversion is possible.
*/
struct InputEventsList {
enum Type {
NoteOn,
NoteOff,
SysexData,
PolyPressure,
CC_Normal,
CC_ChannelPressure,
CC_Pitchbend,
UI_MIDI // event from UI
};
struct InputEventStorage {
Type type;
union {
v3_event_note_on noteOn;
v3_event_note_off noteOff;
v3_event_data sysexData;
v3_event_poly_pressure polyPressure;
uint8_t midi[3];
};
} eventListStorage[kMaxMidiEvents];

struct InputEventTiming {
int32_t sampleOffset;
const InputEventStorage* storage;
InputEventTiming* next;
} eventList[kMaxMidiEvents];

uint16_t numUsed;
int32_t firstSampleOffset;
int32_t lastSampleOffset;
InputEventTiming* firstEvent;
InputEventTiming* lastEvent;

void init()
{
numUsed = 0;
firstSampleOffset = lastSampleOffset = 0;
firstEvent = nullptr;
}

uint32_t convert(MidiEvent midiEvents[kMaxMidiEvents]) const noexcept
{
uint32_t count = 0;

for (const InputEventTiming* event = firstEvent; event != nullptr; event = event->next)
{
MidiEvent& midiEvent(midiEvents[count++]);
midiEvent.frame = event->sampleOffset;

const InputEventStorage& eventStorage(*event->storage);

switch (eventStorage.type)
{
case NoteOn:
midiEvent.size = 3;
midiEvent.data[0] = 0x90 | (eventStorage.noteOn.channel & 0xf);
midiEvent.data[1] = eventStorage.noteOn.pitch;
midiEvent.data[2] = std::max(0, std::min(127, (int)(eventStorage.noteOn.velocity * 127)));
midiEvent.data[3] = 0;
break;
case NoteOff:
midiEvent.size = 3;
midiEvent.data[0] = 0x80 | (eventStorage.noteOff.channel & 0xf);
midiEvent.data[1] = eventStorage.noteOff.pitch;
midiEvent.data[2] = std::max(0, std::min(127, (int)(eventStorage.noteOff.velocity * 127)));
midiEvent.data[3] = 0;
break;
/* TODO
case SysexData:
break;
*/
case PolyPressure:
midiEvent.size = 3;
midiEvent.data[0] = 0xA0 | (eventStorage.polyPressure.channel & 0xf);
midiEvent.data[1] = eventStorage.polyPressure.pitch;
midiEvent.data[2] = std::max(0, std::min(127, (int)(eventStorage.polyPressure.pressure * 127)));
midiEvent.data[3] = 0;
break;
case CC_Normal:
midiEvent.size = 3;
midiEvent.data[0] = 0xB0 | (eventStorage.midi[0] & 0xf);
midiEvent.data[1] = eventStorage.midi[1];
midiEvent.data[2] = eventStorage.midi[2];
break;
case CC_ChannelPressure:
midiEvent.size = 2;
midiEvent.data[0] = 0xD0 | (eventStorage.midi[0] & 0xf);
midiEvent.data[1] = eventStorage.midi[1];
midiEvent.data[2] = 0;
break;
case CC_Pitchbend:
midiEvent.size = 3;
midiEvent.data[0] = 0xE0 | (eventStorage.midi[0] & 0xf);
midiEvent.data[1] = eventStorage.midi[1];
midiEvent.data[2] = eventStorage.midi[2];
break;
case UI_MIDI:
midiEvent.size = 3;
midiEvent.data[0] = eventStorage.midi[0];
midiEvent.data[1] = eventStorage.midi[1];
midiEvent.data[2] = eventStorage.midi[2];
break;
default:
midiEvent.size = 0;
break;
}
}

return count;
}

bool appendEvent(const v3_event& event) noexcept
{
// only save events that can be converted directly into MIDI
switch (event.type)
{
case V3_EVENT_NOTE_ON:
case V3_EVENT_NOTE_OFF:
// case V3_EVENT_DATA:
case V3_EVENT_POLY_PRESSURE:
break;
default:
return false;
}

InputEventStorage& eventStorage(eventListStorage[numUsed]);

switch (event.type)
{
case V3_EVENT_NOTE_ON:
eventStorage.type = NoteOn;
eventStorage.noteOn = event.note_on;
break;
case V3_EVENT_NOTE_OFF:
eventStorage.type = NoteOff;
eventStorage.noteOff = event.note_off;
break;
case V3_EVENT_DATA:
eventStorage.type = SysexData;
eventStorage.sysexData = event.data;
break;
case V3_EVENT_POLY_PRESSURE:
eventStorage.type = PolyPressure;
eventStorage.polyPressure = event.poly_pressure;
break;
default:
return false;
}

eventList[numUsed].sampleOffset = event.sample_offset;
eventList[numUsed].storage = &eventStorage;

return placeSorted(event.sample_offset);
}

bool appendCC(const int32_t sampleOffset, v3_param_id paramId, const double value) noexcept
{
InputEventStorage& eventStorage(eventListStorage[numUsed]);

const uint8_t cc = paramId % 130;

switch (cc)
{
case 128:
eventStorage.type = CC_ChannelPressure;
eventStorage.midi[1] = std::max(0, std::min(127, (int)(value * 127)));
eventStorage.midi[2] = 0;
break;
case 129:
eventStorage.type = CC_Pitchbend;
eventStorage.midi[1] = std::max(0, std::min(16384, (int)(value * 16384))) & 0x7f;
eventStorage.midi[2] = std::max(0, std::min(16384, (int)(value * 16384))) >> 7;
break;
default:
eventStorage.type = CC_Normal;
eventStorage.midi[1] = cc;
eventStorage.midi[2] = std::max(0, std::min(127, (int)(value * 127)));
break;
}

eventStorage.midi[0] = paramId / 130;

eventList[numUsed].sampleOffset = sampleOffset;
eventList[numUsed].storage = &eventStorage;

return placeSorted(sampleOffset);
}

#if DISTRHO_PLUGIN_HAS_UI
// NOTE always runs first
bool appendFromUI(const uint8_t midiData[3])
{
InputEventStorage& eventStorage(eventListStorage[numUsed]);

eventStorage.type = UI_MIDI;
std::memcpy(eventStorage.midi, midiData, sizeof(uint8_t)*3);

InputEventTiming* const event = &eventList[numUsed];

event->sampleOffset = 0;
event->storage = &eventStorage;
event->next = nullptr;

if (numUsed == 0)
{
firstEvent = lastEvent = event;
}
else
{
lastEvent->next = event;
lastEvent = event;
}

return ++numUsed == kMaxMidiEvents;
}
#endif

private:
bool placeSorted(const int32_t sampleOffset) noexcept
{
InputEventTiming* const event = &eventList[numUsed];

// initialize
if (numUsed == 0)
{
firstSampleOffset = lastSampleOffset = sampleOffset;
firstEvent = lastEvent = event;
event->next = nullptr;
}
// push to the back
else if (sampleOffset >= lastSampleOffset)
{
lastSampleOffset = sampleOffset;
lastEvent->next = event;
lastEvent = event;
event->next = nullptr;
}
// push to the front
else if (sampleOffset < firstSampleOffset)
{
firstSampleOffset = sampleOffset;
event->next = firstEvent;
firstEvent = event;
}
// find place in between events
else
{
// keep reference out of the loop so we can check validity afterwards
InputEventTiming* event2 = firstEvent;

// iterate all events
for (; event2 != nullptr; event2 = event2->next)
{
// if offset is higher than iterated event, stop and insert in-between
if (sampleOffset > event2->sampleOffset)
break;

// if offset matches, find the last event with the same offset so we can push after it
if (sampleOffset == event2->sampleOffset)
{
event2 = event2->next;
for (; event2 != nullptr && sampleOffset == event2->sampleOffset; event2 = event2->next) {}
break;
}
}

DISTRHO_SAFE_ASSERT_RETURN(event2 != nullptr, true);

event->next = event2->next;
event2->next = event;
}

return ++numUsed == kMaxMidiEvents;
}
} inputEventList;
#endif // DISTRHO_PLUGIN_WANT_MIDI_INPUT

public:
PluginVst3(v3_host_application** const host)
: fPlugin(this, writeMidiCallback, requestParameterValueChangeCallback, nullptr),
@@ -1285,7 +1565,8 @@ public:
#endif

#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
uint32_t midiEventCount = 0;
bool canAppendMoreEvents = true;
inputEventList.init();

#if DISTRHO_PLUGIN_HAS_UI
while (fNotesRingBuffer.isDataAvailableForReading())
@@ -1294,121 +1575,34 @@ public:
if (! fNotesRingBuffer.readCustomData(midiData, 3))
break;

MidiEvent& midiEvent(fMidiEvents[midiEventCount++]);
midiEvent.frame = 0;
midiEvent.size = 3;
std::memcpy(midiEvent.data, midiData, 3);

if (midiEventCount == kMaxMidiEvents)
if (inputEventList.appendFromUI(midiData))
{
canAppendMoreEvents = false;
break;
}
}
#endif

if (v3_event_list** const eventptr = data->input_events)
if (canAppendMoreEvents)
{
v3_event event;
for (uint32_t i = 0, count = v3_cpp_obj(eventptr)->get_event_count(eventptr); i < count; ++i)
if (v3_event_list** const eventptr = data->input_events)
{
if (v3_cpp_obj(eventptr)->get_event(eventptr, i, &event) != V3_OK)
break;

// check if event can be encoded as MIDI
switch (event.type)
v3_event event;
for (uint32_t i = 0, count = v3_cpp_obj(eventptr)->get_event_count(eventptr); i < count; ++i)
{
case V3_EVENT_NOTE_ON:
case V3_EVENT_NOTE_OFF:
// case V3_EVENT_DATA:
case V3_EVENT_POLY_PRESSURE:
break;
// case V3_EVENT_NOTE_EXP_VALUE:
// case V3_EVENT_NOTE_EXP_TEXT:
// case V3_EVENT_CHORD:
// case V3_EVENT_SCALE:
// case V3_EVENT_LEGACY_MIDI_CC_OUT:
default:
continue;
}

MidiEvent& midiEvent(fMidiEvents[midiEventCount++]);
midiEvent.frame = event.sample_offset;
if (v3_cpp_obj(eventptr)->get_event(eventptr, i, &event) != V3_OK)
break;

// encode event as MIDI
switch (event.type)
{
case V3_EVENT_NOTE_ON:
midiEvent.size = 3;
midiEvent.data[0] = 0x90 | (event.note_on.channel & 0xf);
midiEvent.data[1] = event.note_on.pitch;
midiEvent.data[2] = std::max(0, std::min(127, (int)(event.note_on.velocity * 127)));
midiEvent.data[3] = 0;
break;
case V3_EVENT_NOTE_OFF:
midiEvent.size = 3;
midiEvent.data[0] = 0x80 | (event.note_off.channel & 0xf);
midiEvent.data[1] = event.note_off.pitch;
midiEvent.data[2] = std::max(0, std::min(127, (int)(event.note_off.velocity * 127)));
midiEvent.data[3] = 0;
break;
case V3_EVENT_POLY_PRESSURE:
midiEvent.size = 3;
midiEvent.data[0] = 0xA0 | (event.poly_pressure.channel & 0xf);
midiEvent.data[1] = event.poly_pressure.pitch;
midiEvent.data[2] = std::max(0, std::min(127, (int)(event.poly_pressure.pressure * 127)));
midiEvent.data[3] = 0;
break;
default:
midiEvent.size = 0;
break;
if (inputEventList.appendEvent(event))
{
canAppendMoreEvents = false;
break;
}
}

if (midiEventCount == kMaxMidiEvents)
break;
}
}

// TODO append parameter MIDI events in a sorted way
/*
#if DISTRHO_PLUGIN_WANT_PROGRAMS
if (rindex == 0)
continue;
--rindex;
#endif
#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
MidiEvent& midiEvent(fMidiEvents[midiEventCount++]);
midiEvent.frame = offset;
midiEvent.size = 3;
midiEvent.data[0] = (rindex / 130) & 0xf;

switch (rindex)
{
case 128: // channel pressure
midiEvent.data[0] |= 0xD0;
midiEvent.data[1] = std::max(0, std::min(127, (int)(value * 127)));
midiEvent.data[2] = 0;
midiEvent.data[3] = 0;
break;
case 129: // pitchbend
midiEvent.data[0] |= 0xE0;
midiEvent.data[1] = std::max(0, std::min(16384, (int)(value * 16384))) & 0x7f;
midiEvent.data[2] = std::max(0, std::min(16384, (int)(value * 16384))) >> 7;
midiEvent.data[3] = 0;
break;
default:
midiEvent.data[0] |= 0xB0;
midiEvent.data[1] = rindex % 130;
midiEvent.data[2] = std::max(0, std::min(127, (int)(value * 127)));
midiEvent.data[3] = 0;
break;
}

if (midiEventCount == kMaxMidiEvents)
break;
}
#endif
*/
#endif

// if there are any parameter changes at frame 0, set them here
if (v3_param_changes** const inparamsptr = data->input_params)
{
int32_t offset;
@@ -1424,12 +1618,32 @@ public:

#if DPF_VST3_HAS_INTERNAL_PARAMETERS
if (rindex < kVst3InternalParameterCount)
{
#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
// if there are any MIDI CC events as parameter changes, handle them here
if (canAppendMoreEvents && rindex >= kVst3InternalParameterMidiCC_start && rindex <= kVst3InternalParameterMidiCC_end)
{
for (int32_t j = 0, pcount = v3_cpp_obj(queue)->get_point_count(queue); j < pcount; ++j)
{
if (v3_cpp_obj(queue)->get_point(queue, j, &offset, &value) != V3_OK)
break;

if (inputEventList.appendCC(offset, rindex, value))
{
canAppendMoreEvents = false;
break;
}
}
}
#endif
continue;
}
#endif

if (v3_cpp_obj(queue)->get_point_count(queue) <= 0)
continue;

// if there are any parameter changes at frame 0, handle them here
if (v3_cpp_obj(queue)->get_point(queue, 0, &offset, &value) != V3_OK)
break;

@@ -1442,6 +1656,7 @@ public:
}

#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
const uint32_t midiEventCount = inputEventList.convert(fMidiEvents);
fPlugin.run(inputs, outputs, data->nframes, fMidiEvents, midiEventCount);
#else
fPlugin.run(inputs, outputs, data->nframes);


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