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SmpVSTHost.cpp
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SmpVSTHost.cpp
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/*****************************************************************************/
/* SmpVSTHost.cpp: CSmpVSTHost / CSmpEffect implementation */
/*****************************************************************************/
/******************************************************************************
Copyright (C) 2006 Hermann Seib
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include "stdafx.h"
#include "ChildFrm.h"
#include "EffectWnd.h"
#include "EffSecWnd.h"
#include "specmidi.h"
#include "specwave.h"
#include "vstsysex.h"
#include "SmpVSTHost.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
#pragma intrinsic(memcpy,memset)
/*===========================================================================*/
/* CSmpVSTHost class members */
/*===========================================================================*/
static const int nMaxMidi = 2000; /* max. # MIDI messages buffered for */
/* EffProcess() */
static const int nMaxSysEx = 100; /* max. # MIDI SysEx messages */
/* buffered for EffProcess() */
/*****************************************************************************/
/* CSmpVSTHost : constructor */
/*****************************************************************************/
CSmpVSTHost::CSmpVSTHost()
{
// for this sample project, I've assumed a maximum buffer size
// of 1/3 second at 96KHz - presumably, this is MUCH too much
// and should be tweaked to more reasonable values, since it
// requires a machine with lots of main memory this way...
// user configurability would be nice, of course.
for (int i = 0; i < 2; i++)
pOutputs[i] = new float[32000];
pMidis = new DWORD[nMaxMidi * 2];
nMidis = 0;
pSysEx = new CMidiMsg[nMaxSysEx];
nSysEx = 0;
InitializeCriticalSection(&cs);
}
/*****************************************************************************/
/* ~CSmpVSTHost : destructor */
/*****************************************************************************/
CSmpVSTHost::~CSmpVSTHost()
{
for (int i = 0; i < 2; i++)
delete[] pOutputs[i];
if (pMidis)
delete[] pMidis;
if (pSysEx)
delete[] pSysEx;
}
/*****************************************************************************/
/* OnAudioMasterCallback : redefine the callback a bit */
/*****************************************************************************/
long CSmpVSTHost::OnAudioMasterCallback
(
int nEffect,
long opcode,
long index,
long value,
void *ptr,
float opt
)
{
#if defined(_DEBUG) || defined(_DEBUGFILE)
char szDebug[1024];
int nLen;
switch (opcode)
{
case audioMasterAutomate :
nLen = sprintf(szDebug, "callback: %d audioMasterAutomate %d, %f", nEffect, index, opt);
break;
case audioMasterVersion :
nLen = sprintf(szDebug, "callback: %d audioMasterVersion", nEffect);
break;
case audioMasterCurrentId :
nLen = sprintf(szDebug, "callback: %d audioMasterCurrentId", nEffect);
break;
case audioMasterIdle :
nLen = sprintf(szDebug, "callback: %d audioMasterIdle", nEffect);
break;
case audioMasterPinConnected :
nLen = sprintf(szDebug, "callback: %d audioMasterPinConnected %d", nEffect, index);
break;
/* VST 2.0 additions... */
case audioMasterWantMidi :
nLen = sprintf(szDebug, "callback: %d audioMasterWantMidi %d", nEffect, value);
break;
case audioMasterGetTime :
nLen = sprintf(szDebug, "callback: %d audioMasterGetTime %d", nEffect, value);
break;
case audioMasterProcessEvents :
nLen = sprintf(szDebug, "callback: %d audioMasterProcessEvents %d", nEffect, ((VstEvents *)ptr)->numEvents);
break;
case audioMasterSetTime :
nLen = sprintf(szDebug, "callback: %d audioMasterSetTime %d", nEffect, value);
break;
case audioMasterTempoAt :
nLen = sprintf(szDebug, "callback: %d audioMasterTempoAt %d", nEffect, value);
break;
case audioMasterGetNumAutomatableParameters :
nLen = sprintf(szDebug, "callback: %d audioMasterGetNumAutomatableParameters", nEffect);
break;
case audioMasterGetParameterQuantization :
nLen = sprintf(szDebug, "callback: %d audioMasterGetParameterQuantization", nEffect);
break;
case audioMasterIOChanged :
nLen = sprintf(szDebug, "callback: %d audioMasterIOChanged", nEffect);
break;
case audioMasterNeedIdle :
nLen = sprintf(szDebug, "callback: %d audioMasterNeedIdle", nEffect);
break;
case audioMasterSizeWindow :
nLen = sprintf(szDebug, "callback: %d audioMasterSizeWindow %d,%d", nEffect, index, value);
break;
case audioMasterGetSampleRate :
nLen = sprintf(szDebug, "callback: %d audioMasterGetSampleRate", nEffect);
break;
case audioMasterGetBlockSize :
nLen = sprintf(szDebug, "callback: %d audioMasterGetBlockSize", nEffect);
break;
case audioMasterGetInputLatency :
nLen = sprintf(szDebug, "callback: %d audioMasterGetInputLatency", nEffect);
break;
case audioMasterGetOutputLatency :
nLen = sprintf(szDebug, "callback: %d audioMasterGetOutputLatency", nEffect);
break;
case audioMasterGetPreviousPlug :
nLen = sprintf(szDebug, "callback: %d audioMasterGetPreviousPlug", nEffect);
break;
case audioMasterGetNextPlug :
nLen = sprintf(szDebug, "callback: %d audioMasterGetNextPlug", nEffect);
break;
case audioMasterWillReplaceOrAccumulate :
nLen = sprintf(szDebug, "callback: %d audioMasterWillReplaceOrAccumulate", nEffect);
break;
case audioMasterGetCurrentProcessLevel :
nLen = sprintf(szDebug, "callback: %d audioMasterGetCurrentProcessLevel", nEffect);
break;
case audioMasterGetAutomationState :
nLen = sprintf(szDebug, "callback: %d audioMasterGetAutomationState", nEffect);
break;
case audioMasterOfflineStart :
nLen = sprintf(szDebug, "callback: %d audioMasterOfflineStart %d,%d", nEffect, value, index);
break;
case audioMasterOfflineRead :
nLen = sprintf(szDebug, "callback: %d audioMasterOfflineRead %d,%d", nEffect, value, index);
break;
case audioMasterOfflineWrite :
nLen = sprintf(szDebug, "callback: %d audioMasterOfflineWrite %d", nEffect, value);
break;
case audioMasterOfflineGetCurrentPass :
nLen = sprintf(szDebug, "callback: %d audioMasterOfflineGetCurrentPass", nEffect);
break;
case audioMasterOfflineGetCurrentMetaPass :
nLen = sprintf(szDebug, "callback: %d audioMasterOfflineGetCurrentMetaPass", nEffect);
break;
case audioMasterSetOutputSampleRate :
nLen = sprintf(szDebug, "callback: %d audioMasterSetOutputSampleRate %f", nEffect, opt);
break;
#ifdef VST_2_3_EXTENSIONS
case audioMasterGetOutputSpeakerArrangement :
nLen = sprintf(szDebug, "callback: %d audioMasterGetOutputSpeakerArrangement", nEffect);
break;
#else
case audioMasterGetSpeakerArrangement :
nLen = sprintf(szDebug, "callback: %d audioMasterGetSpeakerArrangement", nEffect);
break;
#endif
case audioMasterGetVendorString :
nLen = sprintf(szDebug, "callback: %d audioMasterGetVendorString", nEffect);
break;
case audioMasterGetProductString :
nLen = sprintf(szDebug, "callback: %d audioMasterGetProductString", nEffect);
break;
case audioMasterGetVendorVersion :
nLen = sprintf(szDebug, "callback: %d audioMasterGetVendorVersion", nEffect);
break;
case audioMasterVendorSpecific :
nLen = sprintf(szDebug, "callback: %d audioMasterVendorSpecific %d,%d,%d,%08lX,%f", nEffect, opcode, index, value, ptr, opt);
break;
case audioMasterSetIcon :
nLen = sprintf(szDebug, "callback: %d audioMasterSetIcon", nEffect);
break;
case audioMasterCanDo :
nLen = sprintf(szDebug, "callback: %d audioMasterCanDo \"%s\"", nEffect, ptr);
break;
case audioMasterGetLanguage :
nLen = sprintf(szDebug, "callback: %d audioMasterGetLanguage", nEffect);
break;
case audioMasterOpenWindow :
nLen = sprintf(szDebug, "callback: %d audioMasterOpenWindow", nEffect);
break;
case audioMasterCloseWindow :
nLen = sprintf(szDebug, "callback: %d audioMasterCloseWindow", nEffect);
break;
case audioMasterGetDirectory :
nLen = sprintf(szDebug, "callback: %d audioMasterGetDirectory", nEffect);
break;
case audioMasterUpdateDisplay :
nLen = sprintf(szDebug, "callback: %d audioMasterUpdateDisplay", nEffect);
break;
//---from here VST 2.1 extension opcodes------------------------------------------------------
#ifdef VST_2_1_EXTENSIONS
case audioMasterBeginEdit :
nLen = sprintf(szDebug, "callback: %d audioMasterBeginEdit Parameter %d", nEffect, index);
break;
case audioMasterEndEdit :
nLen = sprintf(szDebug, "callback: %d audioMasterEndEdit Parameter %d", nEffect, index);
break;
case audioMasterOpenFileSelector :
nLen = sprintf(szDebug, "callback: %d audioMasterOpenFileSelector", nEffect);
break;
#endif
//---from here VST 2.2 extension opcodes------------------------------------------------------
#ifdef VST_2_2_EXTENSIONS
case audioMasterCloseFileSelector :
nLen = sprintf(szDebug, "callback: %d audioMasterCloseFileSelector", nEffect);
break;
case audioMasterEditFile :
nLen = sprintf(szDebug, "callback: %d audioMasterEditFile \"%s\"", nEffect, ptr);
break;
case audioMasterGetChunkFile :
nLen = sprintf(szDebug, "callback: %d audioMasterGetChunkFile", nEffect);
break;
#endif
//---from here VST 2.3 extension opcodes------------------------------------------------------
#ifdef VST_2_1_EXTENSIONS
case audioMasterGetInputSpeakerArrangement :
nLen = sprintf(szDebug, "callback: %d audioMasterGetInputSpeakerArrangement", nEffect);
break;
#endif
}
#endif
long lRC = CVSTHost::OnAudioMasterCallback(nEffect, opcode, index, value, ptr, opt);
#if defined(_DEBUG) || defined(_DEBUGFILE)
switch (opcode)
{
case audioMasterGetChunkFile :
nLen += sprintf(szDebug + nLen, " \"%s\"", ptr);
break;
}
sprintf(szDebug + nLen, " RC=%d", lRC);
TRACE1("%s\n", szDebug);
#endif
return lRC;
}
/*****************************************************************************/
/* OnSetParameterAutomated : make sure parameter changes are reflected */
/*****************************************************************************/
bool CSmpVSTHost::OnSetParameterAutomated(int nEffect, long index, float value)
{
CSmpEffect *pEffect = (CSmpEffect *)GetAt(nEffect);
if (pEffect)
pEffect->OnSetParameterAutomated(index, value);
return CVSTHost::OnSetParameterAutomated(nEffect, index, value);
}
/*****************************************************************************/
/* OnMidiIn : called when a MIDI message comes in */
/*****************************************************************************/
void CSmpVSTHost::OnMidiIn(CMidiMsg &msg)
{
if (msg[0] > 0xf0) /* VSTInstruments don't expect */
return; /* realtime messages! */
else if (msg[0] == 0xf0) /* but SysEx are processed */
{
EnterCriticalSection(&cs); /* must not interfere! */
if ((pSysEx) && /* if allocated, and */
(nSysEx < nMaxSysEx)) /* if still space for another one */
pSysEx[nSysEx++] = msg; /* copy it in */
LeaveCriticalSection(&cs);
}
else
{
EnterCriticalSection(&cs); /* must not interfere! */
if (nMidis < 2 * nMaxMidi) /* if enough place to do it, */
{
pMidis[nMidis++] = msg; /* buffer the message */
pMidis[nMidis++] = msg.GetStamp(); /* and its timestamp */
// TRACE2("MIDI Message %08lX at %d\n", (DWORD)msg, msg.GetStamp());
}
LeaveCriticalSection(&cs);
}
}
/*****************************************************************************/
/* OnProcessEvents : called when an effect sends events */
/*****************************************************************************/
bool CSmpVSTHost::OnProcessEvents(int nEffect, VstEvents *events)
{
int i;
CMidiMsg msg;
bool bErr = false;
for (i = 0; i < events->numEvents; i++) /* process all sent MIDI events */
{
switch (events->events[i]->type)
{
case kVstMidiType : /* normal MIDI message? */
msg.Set(((VstMidiEvent *)(events->events[i]))->midiData, 3);
bErr |= !MidiOut.Output(msg); /* send it to MIDI Out */
break;
case kVstSysExType : /* SysEx message ? */
msg.Set(((VstMidiSysexEvent *)(events->events[i]))->sysexDump,
((VstMidiSysexEvent *)(events->events[i]))->dumpBytes);
bErr |= !MidiOut.Output(msg); /* send it to MIDI Out */
break;
#if 0 // silently ignore all non-MIDI events
default : /* anything else? */
bErr = true;
break;
#endif
}
}
return !bErr;
}
/*****************************************************************************/
/* CreateMIDIEvents : creates a set of VST MIDI events */
/*****************************************************************************/
BYTE * CSmpVSTHost::CreateMIDIEvents
(
int nLength, /* # samples */
DWORD dwStamp, /* timestamp of 1st sample */
int nm, /* # normal MIDI messages */
int ns /* # sysex messages */
)
{
if ((!nm) && (!ns)) /* if neither normal nor sysex there */
return NULL; /* nothing to do in here */
BYTE *pEvData;
int nHdrLen, nTotLen;
int i;
DWORD dwDelta;
VstMidiEvent *pEv;
VstMidiSysexEvent *pSEv;
int nSysBase;
nHdrLen = sizeof(VstEvents) + /* calculate header length */
((nm - 1) * sizeof(VstMidiEvent *)) +
(ns * sizeof(VstMidiSysexEvent *));
nTotLen = nHdrLen + /* calculate total events length */
(nm * sizeof(VstMidiEvent)) +
(ns * sizeof(VstMidiSysexEvent));
pEvData = new BYTE[nTotLen]; /* allocate space for events */
if (pEvData) /* if that worked, */
{ /* copy in normal and SysEx */
VstEvents *pEvents = (VstEvents *) pEvData;
memset(pEvents, 0, nTotLen);
pEvents->numEvents = (nm / 2) + ns;
for (i = 0; i < nm; i += 2) /* copy in all normal MIDI messages */
{
pEv = ((VstMidiEvent *)(pEvData + nHdrLen)) + (i / 2);
pEvents->events[i / 2] = (VstEvent *)pEv;
pEv->type = kVstMidiType;
pEv->byteSize = sizeof(VstMidiEvent);
memcpy(pEv->midiData, pMidis + i, sizeof(DWORD));
// offset assumes a fixed rate of 44.1kHz and drops 1 percent accuracy
dwDelta = (pMidis[i + 1] - dwStamp) * 44;
if (dwDelta > (DWORD)nLength)
dwDelta = nLength - 1;
pEv->deltaFrames = dwDelta;
/* ALL VSTHost events are realtime */
pEv->flags = kVstMidiEventIsRealtime;
}
nm >>= 1;
nSysBase = nHdrLen + (sizeof(VstMidiEvent) * nm);
for (i = 0; i < ns; i++) /* copy in all SysEx messages */
{
pSEv = ((VstMidiSysexEvent *)(pEvData + nSysBase)) + i;
pEvents->events[nm + i] = (VstEvent *)pSEv;
pSEv->type = kVstSysExType;
pSEv->byteSize = sizeof(VstMidiSysexEvent);
pSEv->deltaFrames = pSysEx[i].GetStamp() - dwStamp;
pSEv->dumpBytes = pSysEx[i].Length();
pSEv->sysexDump = pSysEx[i];
pSEv->flags = pSEv->resvd1 = pSEv->resvd2 = 0;
}
}
return pEvData;
}
/*****************************************************************************/
/* CreateMIDISubset : creates an event subset for a specific effect */
/*****************************************************************************/
BYTE * CSmpVSTHost::CreateMIDISubset(void *pEvData, unsigned short wChnMask)
{
if (!pEvData)
return NULL;
VstEvents *pEvents = (VstEvents *) pEvData;
VstMidiEvent *pEv;
int i, nMatching = 0;
for (i = pEvents->numEvents - 1; i >= 0; i--)
{
pEv = (VstMidiEvent *)pEvents->events[i];
if ((pEv->type == kVstSysExType) || /* SysEx goes to all, */
(wChnMask & /* for normal MIDI channel has to fit*/
(1 << (pEv->midiData[0] & 0x0F))))
nMatching++;
}
if (!nMatching)
return NULL;
int nHdrLen = sizeof(VstEvents) +
((nMatching - 1) * sizeof(VstMidiEvent *));
BYTE * pEffEvData = new BYTE[nHdrLen];
VstEvents *pEffEvents = (VstEvents *) pEffEvData;
pEffEvents->numEvents = nMatching;
nMatching = 0;
for (i = 0; i < pEvents->numEvents; i++)
{
pEv = (VstMidiEvent *)pEvents->events[i];
if ((pEv->type == kVstSysExType) || /* SysEx goes to all, */
(wChnMask & /* for normal MIDI channel has to fit*/
(1 << (pEv->midiData[0] & 0x0F))))
pEffEvents->events[nMatching++] = pEvents->events[i];
}
return pEffEvData;
}
/*****************************************************************************/
/* PassThruEffect : passes the sample data through one of the effects */
/*****************************************************************************/
void CSmpVSTHost::PassThruEffect
(
CSmpEffect *pEff, /* effect to call */
float **pBuffer, /* input buffers */
int nLength, /* length of these */
int nChannels, /* # channels */
BYTE *pEvData, /* Midi events during this period */
bool bReplacing
)
{
BYTE *pEffEvData = CreateMIDISubset(pEvData, pEff->GetChnMask());
float *pBuf1;
int j; /* loop counters */
pEff->EnterCritical(); /* make sure we don't get killed now */
if (pEff->bWantMidi) /* if effect wants MIDI events */
{
static VstEvents noEvData = {0}; /* necessary for Reaktor ... */
try
{
pEff->EffProcessEvents((pEffEvData) ? (VstEvents *)pEffEvData : &noEvData);
}
catch(...)
{
TRACE0("Serious error in pEff->EffProcessEvents()!\n");
}
}
float *pEmpty = GetApp()->GetEmptyBuffer();
for (j = 0; j < nChannels; j++)
pEff->SetInputBuffer(j, pBuffer[j]);
for (; j < pEff->pEffect->numInputs; j++)
pEff->SetInputBuffer(j, pEmpty);
/* then process the buffer itself */
/* clean all output buffers */
// NB: this has to be done even in EffProcessReplacing() since some VSTIs
// (most notably those from Steinberg... hehe) obviously don't implement
// processReplacing() as a separate function but rather use process()
for (j = 0; j < pEff->pEffect->numOutputs; j++)
{
pBuf1 = pEff->GetOutputBuffer(j);
if (pBuf1)
memcpy(pBuf1, pEmpty, nLength * sizeof(float));
}
/* if replacing implemented */
if ((bReplacing) && /* and wanted */
(pEff->pEffect->flags & effFlagsCanReplacing))
pEff->EffProcessReplacing(nLength); /* do processReplacing */
else /* otherwise */
pEff->EffProcess(nLength); /* call process */
pEff->LeaveCritical(); /* reallow killing */
if (pEffEvData) /* if there are event data for this */
delete pEffEvData; /* delete 'em */
}
/*****************************************************************************/
/* OnSamples : called when sample data come in */
/*****************************************************************************/
void CSmpVSTHost::OnSamples
(
float **pBuffer,
int nLength,
int nChannels,
DWORD dwStamp
)
{
int nEffs = 0; /* # contributing effects */
int i, j, k; /* loop counters */
int nSize = GetSize(); /* get # affected effects */
int nm = nMidis;
int ns = nSysEx;
CSmpEffect *pEff, *pNextEff;
float *pBuf1, *pBuf2;
CVsthostApp *pApp = GetApp();
float *pEmpty = pApp->GetEmptyBuffer();
// NO optimizations in here, as well as NO checks for overruns etc...
if (nLength > lBlockSize) /* prevent buffer overflow! */
nLength = lBlockSize;
vstTimeInfo.nanoSeconds = (double)timeGetTime() * 1000000.0L;
CalcTimeInfo();
BYTE *pEvData = CreateMIDIEvents(nLength, dwStamp, nm, ns);
for (i = 0; i < nSize; i++) /* pass them through all interested */
{ /* effects */
pEff = (CSmpEffect *)GetAt(i);
if ((!pEff) || /* if no effect at this position */
(pEff->GetPrev())) /* or it's part of a chain */
continue; /* skip this one */
/* pass through the effect */
PassThruEffect(pEff,
pBuffer, nLength, nChannels,
pEvData,
true);
while ((pNextEff = pEff->GetNext())) /* while more in chain */
{
PassThruEffect(pNextEff, /* pass these through next effect */
pEff->GetOutputBuffers(), nLength, nChannels,
pEvData,
true);
pEff = pNextEff; /* and advance to next in chain */
}
nEffs++; /* increment #participating effects */
}
if (pEvData) /* delete eventual MIDI event data */
delete pEvData;
/* make sure we don't lose new events*/
EnterCriticalSection(&cs);
if (nm < nMidis)
for (i = nm; i < nMidis; i++)
pMidis[i - nm] = pMidis[i];
nMidis -= nm;
if (ns < nSysEx)
for (i = ns; i < nSysEx; i++)
pSysEx[i - ns] = pSysEx[i];
nSysEx -= ns;
LeaveCriticalSection(&cs);
if (!nEffs) /* if no effects there */
{ /* just mute input */
for (j = 0; j < nChannels; j++)
{
pBuf1 = pBuffer[j];
memcpy(pBuf1, pEmpty, nLength * sizeof(float));
}
pApp->SendResult(pBuffer, nLength); /* and blow out some silence */
}
else /* otherwise */
{
int nOut = 0;
// this is a hard-wired mixer - should be replaced with a "real" mixer
float fMult = (float)sqrt(1.0f / nEffs);
for (i = 0; i < GetSize(); i++) /* merge all generated outputs */
{
// VERY simple version... all loaded effects' outputs are merged
// into a parallelized stream of stereo samples; no chaining, fixed mixing;
// no sample rate conversion or the like;
// the # effects determines a single effect's contribution to the output.
pEff = (CSmpEffect *)GetAt(i);
if ((!pEff) || /* if no effect at this position */
(pEff->GetPrev())) /* or it's part of a chain */
continue;
while ((pNextEff = pEff->GetNext())) /* walk to last in chain */
pEff = pNextEff; /* which has the final buffers */
pEff->EnterCritical(); /* make sure we don't get killed now */
for (j = 0; j < 2; j++) /* do for our 2 outputs */
{
pBuf1 = pOutputs[j];
pBuf2 = pEff->GetOutputBuffer(j);
if ((!pBuf1) || (!pBuf2))
break;
if (!nOut)
for (k = 0; k < nLength; k++) /* loop through the samples */
*pBuf1++ = *pBuf2++ *fMult;
else
for (k = 0; k < nLength; k++) /* loop through the samples */
*pBuf1++ += *pBuf2++ * fMult;
}
pEff->LeaveCritical(); /* reallow killing */
nOut++;
}
// now that we've got a populated output buffer set, send it to
// the Wave Output device.
pApp->SendResult(pOutputs, nLength);
}
vstTimeInfo.samplePos += (float)nLength;
/* in any case, reset "changed" flag */
vstTimeInfo.flags &= ~kVstTransportChanged;
}
/*****************************************************************************/
/* OnCanDo : plugin wants to know whether host can do... */
/*****************************************************************************/
bool CSmpVSTHost::OnCanDo(const char *ptr)
{
if ((!strcmp(ptr, "openFileSelector")) ||
(!strcmp(ptr, "closeFileSelector")) ||
// (!strcmp(ptr, "supportShell")) || /* old-style Waves plugin shell */
(!strcmp(ptr, "shellCategory")) ||
(!strcmp(ptr, "supplyIdle")) )
return true;
return CVSTHost::OnCanDo(ptr);
}
/*****************************************************************************/
/* OnOpenFileSelector : called when an effect needs a file selector */
/*****************************************************************************/
static int CALLBACK BrowseCallbackProc
(
HWND hwnd,
UINT uMsg,
LPARAM lParam,
LPARAM lpData
)
{
if (uMsg == BFFM_INITIALIZED)
{
if (lpData && *((LPCSTR)lpData))
::SendMessage(hwnd, BFFM_SETSELECTION, TRUE, lpData);
}
return 0;
}
bool CSmpVSTHost::OnOpenFileSelector (int nEffect, VstFileSelect *ptr)
{
#if defined(VST_2_1_EXTENSIONS)
ptr->reserved = 0;
if (ptr->command == kVstMultipleFilesLoad)
return false; // not yet
else if ((ptr->command == kVstFileLoad) ||
(ptr->command == kVstFileSave))
{
CString sFilter;
for (int i = 0; i < ptr->nbFileTypes; i++)
{
sFilter += CString(ptr->fileTypes[i].name) +
" (*." +
ptr->fileTypes[i].dosType +
")|*." +
ptr->fileTypes[i].dosType +
"|";
}
if (!sFilter.IsEmpty())
sFilter += "|";
CFileDialog dlg((ptr->command != kVstFileSave),
NULL, /* default extension */
ptr->initialPath, /* filename */
OFN_HIDEREADONLY | /* flags */
OFN_OVERWRITEPROMPT
#if 0
// not yet
| ((ptr->command == kVstMultipleFilesLoad) ? OFN_ALLOWMULTISELECT : 0)
#endif
,
sFilter, /* filter */
NULL); /* parent window */
dlg.m_ofn.lpstrTitle = ptr->title;
if (dlg.DoModal() == IDOK)
{
if (!ptr->returnPath)
{
ptr->returnPath = new char[dlg.GetPathName().GetLength() + 1];
ptr->reserved = 1;
}
strcpy(ptr->returnPath, dlg.GetPathName());
ptr->nbReturnPath = 1;
return true;
}
}
else if (ptr->command == kVstDirectorySelect)
{
char szDisplayName[_MAX_PATH];
BROWSEINFO bi = {0};
bi.hwndOwner = AfxGetMainWnd()->GetSafeHwnd();
bi.pszDisplayName = szDisplayName;
bi.lpszTitle = ptr->title;
bi.ulFlags = BIF_RETURNONLYFSDIRS;
bi.lpfn = BrowseCallbackProc;
bi.lParam = (LPARAM)ptr->initialPath;
LPITEMIDLIST pidl = SHBrowseForFolder(&bi);
if (pidl)
{
if (SHGetPathFromIDList(pidl, szDisplayName))
{
if (!ptr->returnPath)
{
ptr->returnPath = new char[strlen(szDisplayName) + 1];
ptr->reserved = 1;
}
strcpy(ptr->returnPath, szDisplayName);
ptr->nbReturnPath = 1;
return true;
}
}
}
#endif
return false;
}
/*****************************************************************************/
/* OnCloseFileSelector : called when an effect closes a file selector */
/*****************************************************************************/
bool CSmpVSTHost::OnCloseFileSelector (int nEffect, VstFileSelect *ptr)
{
if (ptr->reserved == 1)
{
delete[] ptr->returnPath;
ptr->returnPath = 0;
ptr->reserved = 0;
}
return false;
}
/*****************************************************************************/
/* OnGetChunkFile : returns current .fxb / .fxp name */
/*****************************************************************************/
bool CSmpVSTHost::OnGetChunkFile(int nEffect, void * nativePath)
{
CSmpEffect *pEffect = (CSmpEffect *)GetAt(nEffect);
if (pEffect && pEffect->GetChunkFile().GetLength())
{
strcpy((char *)nativePath, pEffect->GetChunkFile());
return true;
}
return false;
}
/*****************************************************************************/
/* OnIdle : idle processing */
/*****************************************************************************/
long CSmpVSTHost::OnIdle
(
int nEffect /* effect ID that triggered this */
)
{
GetApp()->OnEffIdle(nEffect);
return 0;
}
/*===========================================================================*/
/* CSmpEffect class members */
/*===========================================================================*/
/*****************************************************************************/
/* CSmpEffect : constructor */
/*****************************************************************************/
CSmpEffect::CSmpEffect(CVSTHost *pHost)
: CEffect(pHost)
{
InitializeCriticalSection(&cs);
pFrameWnd = 0;
pEditWnd = pParmWnd = 0;
inBufs = outBufs = 0;
nAllocatedInbufs = nAllocatedOutbufs = 0;
wChnMask = 0xffff;
pPrev = pNext = NULL;
nLoadNum = -1;
}
/*****************************************************************************/
/* ~CSmpEffect : destructor */
/*****************************************************************************/
CSmpEffect::~CSmpEffect()
{
int i;
RemoveFromChain(); /* remove from chain (if any) */
EnterCritical(); /* inhibit others! */
if (inBufs)
{
#if 0
// these are set by VST Host; it would ruin performance
// if we copied data into the effect every time
for (i = 0; i < nAllocatedInbufs; i++)
if (inBufs[i])
delete[] inBufs[i];
#endif
delete[] inBufs;
}
if (outBufs)
{
// these are managed by the effect object, so we
// have to delete them here
for (i = nAllocatedOutbufs - 1; i >= 0; i--)
if ((outBufs[i]) &&
((!i) || (outBufs[i] != outBufs[0])))
delete[] outBufs[i];
delete[] outBufs;
}
LeaveCritical(); /* reallow others */
DeleteCriticalSection(&cs);
}
/*****************************************************************************/
/* Load : loads a plugin */
/*****************************************************************************/
bool CSmpEffect::Load(const char *name)
{
if (!CEffect::Load(name)) /* do basic stuff */
return false;
int i, j; /* loop counter */
if (pEffect->numInputs) /* allocate input pointers */
{
inBufs = new float *[pEffect->numInputs];
if (!inBufs)
return false;
for (i = 0; i < pEffect->numInputs; i++)
inBufs[i] = 0;
nAllocatedInbufs = pEffect->numInputs;
}
if (pEffect->numOutputs) /* allocate output pointers */
{
int nAlloc;
if (pEffect->numOutputs < 2)
nAlloc = 2;
else
nAlloc = pEffect->numOutputs;
outBufs = new float *[nAlloc];
if (!outBufs)
return false;
/* and the buffers pointed to */
for (i = 0; i < pEffect->numOutputs; i++)
{
// for this sample project, I've assumed a maximum buffer size
// of 1/4 second at 96KHz - presumably, this is MUCH too much
// and should be tweaked to more reasonable values, since it
// requires a machine with lots of main memory this way...
// user configurability would be nice, of course.
outBufs[i] = new float[24000];
if (!outBufs[i])
return false;
for (j = 0; j < 24000; j++)
outBufs[i][j] = 0.f;
}
for (; i < nAlloc; i++) /* if less than 2, fill up */
outBufs[i] = outBufs[0]; /* by replicating buffer 0 pointer */
nAllocatedOutbufs = nAlloc;
}
return true;
}
/*****************************************************************************/
/* Unload : removes an effect from memory */
/*****************************************************************************/
bool CSmpEffect::Unload()
{
bool bRC = false;
//__try
try
{
bRC = CEffect::Unload();
}
//__except (EvalException(GetExceptionCode()))
catch(...)
{
// no code here; isn't executed
}
return bRC;
}
/*****************************************************************************/
/* OnOpenWindow : called to open yet another window */
/*****************************************************************************/
void * CSmpEffect::OnOpenWindow(VstWindow* window)
{
CChildFrame *pFrame = GetFrameWnd();
if (pFrame)
{
CEffectWnd *pWnd;
pWnd = (CEffectWnd *)GetApp()->CreateChild(pEditWnd ?
RUNTIME_CLASS(CEffSecWnd) :
RUNTIME_CLASS(CEffectWnd),
IDR_EFFECTTYPE,
pFrame->GetEditMenu());
if (pWnd)
{
HWND hWnd = pWnd->GetSafeHwnd();
// ignored at the moment: style, position
ERect rc = {0};
rc.right = window->width;
rc.bottom = window->height;
pWnd->ShowWindow(SW_SHOWNORMAL);
pWnd->SetEffect(pFrame->GetEffect());
pWnd->SetMain(pFrame);
pWnd->SetEffSize(&rc);
pWnd->SetupTitleText(window->title);
if (!pEditWnd)
{
pFrame->SetEditWnd(pWnd);
SetEditWnd(pWnd);
// EffEditOpen(hWnd);
}
pWnd->SetupTitle();
window->winHandle = hWnd;
return pWnd->GetSafeHwnd();
}
}
return 0; /* no effect - no window. */
}