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livetrax/libs/ardour/session_vst.cc

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/*
Copyright (C) 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef COMPILER_MSVC
#include <stdbool.h>
#endif
#include <cstdio>
#include "ardour/audioengine.h"
#include "ardour/debug.h"
#include "ardour/session.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"
using namespace ARDOUR;
#define SHOW_CALLBACK(MSG) DEBUG_TRACE (PBD::DEBUG::VSTCallbacks, string_compose (MSG " val = %1 idx = %2", index, value))
int Session::vst_current_loading_id = 0;
const char* Session::vst_can_do_strings[] = {
X_("supplyIdle"),
X_("sendVstTimeInfo"),
X_("sendVstEvents"),
X_("sendVstMidiEvent"),
X_("receiveVstEvents"),
X_("receiveVstMidiEvent"),
X_("supportShell"),
X_("shellCategory"),
X_("shellCategorycurID")
};
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;
if (effect && effect->user) {
plug = (VSTPlugin *) (effect->user);
session = &plug->session();
DEBUG_TRACE (PBD::DEBUG::VSTCallbacks, string_compose ("am callback 0x%1%2, opcode = %3%4, plugin = \"%5\" ",
std::hex, (void*) DEBUG_THREAD_SELF,
std::dec, opcode, plug->name()));
} else {
plug = 0;
session = 0;
DEBUG_TRACE (PBD::DEBUG::VSTCallbacks, string_compose ("am callback 0x%1%2, opcode = %3%4",
std::hex, (void*) DEBUG_THREAD_SELF,
std::dec, opcode));
}
switch(opcode){
case audioMasterAutomate:
SHOW_CALLBACK ("audioMasterAutomate");
// index, value, returns 0
if (plug) {
plug->parameter_changed_externally (index, opt);
}
return 0;
case audioMasterVersion:
SHOW_CALLBACK ("audioMasterVersion");
// vst version, currently 2 (0 for older)
return 2400;
case audioMasterCurrentId:
SHOW_CALLBACK ("audioMasterCurrentId");
// returns the unique id of a plug that's currently loading
return vst_current_loading_id;
case audioMasterIdle:
SHOW_CALLBACK ("audioMasterIdle");
#ifdef WINDOWS_VST_SUPPORT
fst_audio_master_idle();
#endif
if (effect) {
effect->dispatcher(effect, effEditIdle, 0, 0, NULL, 0.0f);
}
return 0;
case audioMasterPinConnected:
SHOW_CALLBACK ("audioMasterPinConnected");
// inquire if an input or output is beeing connected;
// index enumerates input or output counting from zero:
// value is 0 for input and != 0 otherwise. note: the
// return value is 0 for <true> such that older versions
// will always return true.
if (!plug) {
// we don't know.
// but ardour always connects all buffers, so we're good
return 0;
}
switch (value) {
case 0:
if (index < plug->plugin()->numInputs) {
return 0;
}
break;
case 1:
if (index < plug->plugin()->numOutputs) {
return 0;
}
break;
default:
break;
}
return 1;
case audioMasterWantMidi:
SHOW_CALLBACK ("audioMasterWantMidi");
// <value> is a filter which is currently ignored
if (plug && plug->get_info() != NULL) {
plug->get_info()->n_inputs.set_midi (1);
}
return 0;
case audioMasterGetTime:
SHOW_CALLBACK ("audioMasterGetTime");
// returns const VstTimeInfo* (or 0 if not supported)
// <value> should contain a mask indicating which fields are required
// (see valid masks above), as some items may require extensive
// conversions
_timeInfo.flags = 0;
if (session) {
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);
}
//ToDo:
//if this is found to be burdensome to plugins,
//we should cache the previous state at a global level,
//and only set this flag when the transport changes state
_timeInfo.flags |= (kVstTransportChanged);
if (session->transport_speed() != 0.0f) {
_timeInfo.flags |= (kVstTransportPlaying);
}
if (session->get_play_loop()) {
_timeInfo.flags |= (kVstTransportCycleActive);
}
} else {
_timeInfo.samplePos = 0;
_timeInfo.sampleRate = AudioEngine::instance()->sample_rate();
}
return (intptr_t) &_timeInfo;
case audioMasterProcessEvents:
SHOW_CALLBACK ("audioMasterProcessEvents");
// VstEvents* in <ptr>
if (plug && 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:
SHOW_CALLBACK ("audioMasterSetTime");
// VstTimenfo* in <ptr>, filter in <value>, not supported
case audioMasterTempoAt:
SHOW_CALLBACK ("audioMasterTempoAt");
// returns tempo (in bpm * 10000) at sample frame location passed in <value>
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 ("audioMasterGetNumAutomatableParameters");
return 0;
case audioMasterGetParameterQuantization:
SHOW_CALLBACK ("audioMasterGetParameterQuantization");
// 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 ("audioMasterIOChanged");
// numInputs and/or numOutputs has changed
return 0;
case audioMasterNeedIdle:
SHOW_CALLBACK ("audioMasterNeedIdle");
// plug needs idle calls (outside its editor window)
if (plug) {
plug->state()->wantIdle = 1;
}
return 0;
case audioMasterSizeWindow:
SHOW_CALLBACK ("audioMasterSizeWindow");
if (plug && plug->state()) {
plug->state()->width = index;
plug->state()->height = value;
plug->state()->want_resize = 1;
}
return 0;
case audioMasterGetSampleRate:
SHOW_CALLBACK ("audioMasterGetSampleRate");
if (session) {
return session->frame_rate();
}
return 0;
case audioMasterGetBlockSize:
SHOW_CALLBACK ("audioMasterGetBlockSize");
if (session) {
return session->get_block_size();
}
return 0;
case audioMasterGetInputLatency:
SHOW_CALLBACK ("audioMasterGetInputLatency");
return 0;
case audioMasterGetOutputLatency:
SHOW_CALLBACK ("audioMasterGetOutputLatency");
return 0;
case audioMasterGetPreviousPlug:
SHOW_CALLBACK ("audioMasterGetPreviousPlug");
// input pin in <value> (-1: first to come), returns cEffect*
return 0;
case audioMasterGetNextPlug:
SHOW_CALLBACK ("audioMasterGetNextPlug");
// output pin in <value> (-1: first to come), returns cEffect*
case audioMasterWillReplaceOrAccumulate:
SHOW_CALLBACK ("audioMasterWillReplaceOrAccumulate");
// returns: 0: not supported, 1: replace, 2: accumulate
return 0;
case audioMasterGetCurrentProcessLevel:
SHOW_CALLBACK ("audioMasterGetCurrentProcessLevel");
// returns: 0: not supported,
// 1: currently in user thread (gui)
// 2: currently in audio thread (where process is called)
// 3: currently in 'sequencer' thread (midi, timer etc)
// 4: currently offline processing and thus in user thread
// other: not defined, but probably pre-empting user thread.
return 0;
case audioMasterGetAutomationState:
SHOW_CALLBACK ("audioMasterGetAutomationState");
// returns 0: not supported, 1: off, 2:read, 3:write, 4:read/write
// offline
return 0;
case audioMasterOfflineStart:
SHOW_CALLBACK ("audioMasterOfflineStart");
return 0;
case audioMasterOfflineRead:
SHOW_CALLBACK ("audioMasterOfflineRead");
// ptr points to offline structure, see below. return 0: error, 1 ok
return 0;
case audioMasterOfflineWrite:
SHOW_CALLBACK ("audioMasterOfflineWrite");
// same as read
return 0;
case audioMasterOfflineGetCurrentPass:
SHOW_CALLBACK ("audioMasterOfflineGetCurrentPass");
return 0;
case audioMasterOfflineGetCurrentMetaPass:
SHOW_CALLBACK ("audioMasterOfflineGetCurrentMetaPass");
return 0;
case audioMasterSetOutputSampleRate:
SHOW_CALLBACK ("audioMasterSetOutputSampleRate");
// for variable i/o, sample rate in <opt>
return 0;
case audioMasterGetSpeakerArrangement:
SHOW_CALLBACK ("audioMasterGetSpeakerArrangement");
// (long)input in <value>, output in <ptr>
return 0;
case audioMasterGetVendorString:
SHOW_CALLBACK ("audioMasterGetVendorString");
// fills <ptr> with a string identifying the vendor (max 64 char)
strcpy ((char*) ptr, "Linux Audio Systems");
return 0;
case audioMasterGetProductString:
SHOW_CALLBACK ("audioMasterGetProductString");
// fills <ptr> with a string with product name (max 64 char)
strcpy ((char*) ptr, PROGRAM_NAME);
return 0;
case audioMasterGetVendorVersion:
SHOW_CALLBACK ("audioMasterGetVendorVersion");
// returns vendor-specific version
return 900;
case audioMasterVendorSpecific:
SHOW_CALLBACK ("audioMasterVendorSpecific");
// no definition, vendor specific handling
return 0;
case audioMasterSetIcon:
SHOW_CALLBACK ("audioMasterSetIcon");
// void* in <ptr>, format not defined yet
return 0;
case audioMasterCanDo:
SHOW_CALLBACK ("audioMasterCanDo");
// 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 ("audioMasterGetLanguage");
// see enum
return 0;
case audioMasterOpenWindow:
SHOW_CALLBACK ("audioMasterOpenWindow");
// returns platform specific ptr
return 0;
case audioMasterCloseWindow:
SHOW_CALLBACK ("audioMasterCloseWindow");
// close window, platform specific handle in <ptr>
return 0;
case audioMasterGetDirectory:
SHOW_CALLBACK ("audioMasterGetDirectory");
// get plug directory, FSSpec on MAC, else char*
return 0;
case audioMasterUpdateDisplay:
SHOW_CALLBACK ("audioMasterUpdateDisplay");
// something has changed, update 'multi-fx' display
if (effect) {
effect->dispatcher(effect, effEditIdle, 0, 0, NULL, 0.0f);
}
return 0;
case audioMasterBeginEdit:
SHOW_CALLBACK ("audioMasterBeginEdit");
// begin of automation session (when mouse down), parameter index in <index>
return 0;
case audioMasterEndEdit:
SHOW_CALLBACK ("audioMasterEndEdit");
// end of automation session (when mouse up), parameter index in <index>
return 0;
case audioMasterOpenFileSelector:
SHOW_CALLBACK ("audioMasterOpenFileSelector");
// open a fileselector window with VstFileSelect* in <ptr>
return 0;
default:
DEBUG_TRACE (PBD::DEBUG::VSTCallbacks, string_compose ("VST master dispatcher: undefed: %1\n", opcode));
break;
}
return 0;
}
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