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/*
Onset detector for SuperCollider
Copyright (c) 2007 Dan Stowell. All rights reserved.
http://onsetsds.sourceforge.net
Now part of:
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "SC_PlugIn.h"
#include "SCComplex.h"
#include "FFT_UGens.h"
#include "Onsets.h"
//////////////////////////////////////////////////////////////////////////////////////////////////
// for operation on one buffer
// almost like PV_GET_BUF except it outputs unit->outval rather than -1 when FFT not triggered
#define Onsets_GET_BUF \
float fbufnum = ZIN0(0); \
if (fbufnum < 0.f) { \
ZOUT0(0) = unit->outval; \
return; \
} \
ZOUT0(0) = fbufnum; \
uint32 ibufnum = (uint32)fbufnum; \
World* world = unit->mWorld; \
SndBuf* buf; \
if (ibufnum >= world->mNumSndBufs) { \
int localBufNum = ibufnum - world->mNumSndBufs; \
Graph* parent = unit->mParent; \
if (localBufNum <= parent->localBufNum) { \
buf = parent->mLocalSndBufs + localBufNum; \
} else { \
buf = world->mSndBufs; \
} \
} else { \
buf = world->mSndBufs + ibufnum; \
} \
LOCK_SNDBUF(buf);
//////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////
void Onsets_Ctor(Onsets* unit) {
if (ZIN0(8) > 0)
SETCALC(Onsets_next_rawodf);
else
SETCALC(Onsets_next);
unit->m_needsinit = true;
unit->m_ods = (OnsetsDS*)RTAlloc(unit->mWorld, sizeof(OnsetsDS));
unit->m_odsdata = nullptr;
ClearUnitIfMemFailed(unit->m_ods);
ZOUT0(0) = unit->outval = 0.f;
}
void Onsets_next(Onsets* unit, int inNumSamples) {
Onsets_GET_BUF
// In practice, making the polar conversion here in SC is more efficient because SC provides a lookup table
// method.
SCPolarBuf* p = ToPolarApx(buf);
OnsetsDS* ods = unit->m_ods;
int odftype = (int)ZIN0(2);
float relaxtime = ZIN0(3);
int medspan = (int)ZIN0(6);
if (unit->m_needsinit) {
// Init happens here because we need to be sure about FFT size.
unit->m_odsdata = (float*)RTAlloc(unit->mWorld, onsetsds_memneeded(odftype, buf->samples, medspan));
ClearUnitIfMemFailed(unit->m_odsdata);
onsetsds_init(ods, unit->m_odsdata, ODS_FFT_SC3_POLAR, odftype, buf->samples, medspan, FULLRATE);
onsetsds_setrelax(ods, relaxtime, buf->samples >> 1);
unit->m_needsinit = false;
}
// Here is the best place to set parameters - after init is ensured
// These are "painless" to set:
ods->thresh = ZIN0(1);
ods->floor = ZIN0(4);
ods->mingap = (int)ZIN0(5);
ods->whtype = (int)ZIN0(7);
// Now to process
unit->outval = onsetsds_process(ods, (float*)p);
ZOUT0(0) = unit->outval;
}
void Onsets_next_rawodf(Onsets* unit, int inNumSamples) {
Onsets_GET_BUF
// In practice, making the polar conversion here in SC is more efficient because SC provides a lookup table
// method.
SCPolarBuf* p = ToPolarApx(buf);
OnsetsDS* ods = unit->m_ods;
int odftype = (int)ZIN0(2);
float relaxtime = ZIN0(3);
int medspan = (int)ZIN0(6);
if (unit->m_needsinit) {
// Init happens here because we need to be sure about FFT size.
unit->m_odsdata = (float*)RTAlloc(unit->mWorld, onsetsds_memneeded(odftype, buf->samples, medspan));
ClearUnitIfMemFailed(unit->m_odsdata);
onsetsds_init(ods, unit->m_odsdata, ODS_FFT_SC3_POLAR, odftype, buf->samples, medspan, FULLRATE);
onsetsds_setrelax(ods, relaxtime, buf->samples >> 1);
unit->m_needsinit = false;
}
// Here is the best place to set parameters - after init is ensured
// These are "painless" to set:
ods->thresh = ZIN0(1);
ods->floor = ZIN0(4);
ods->mingap = (int)ZIN0(5);
ods->whtype = (int)ZIN0(7);
// Now to process
onsetsds_process(ods, (float*)p);
// But we want the ODF, not the triggers, for this special mode...
// unit->outval = ods->odfvalpost;
unit->outval = ods->odfvals[0];
ZOUT0(0) = unit->outval;
}
void Onsets_Dtor(Onsets* unit) {
if (!unit->m_needsinit) {
RTFree(unit->mWorld, unit->m_odsdata);
}
RTFree(unit->mWorld, unit->m_ods);
}
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