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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* inputprocessor.cc
*
* Sat Apr 23 20:39:30 CEST 2016
* Copyright 2016 André Nusser
* andre.nusser@googlemail.com
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "inputprocessor.h"
#include <list>
#include "hugin.hpp"
#include "instrument.h"
InputProcessor::InputProcessor(DrumKit& kit, std::list<Event*>* activeevents)
: kit(kit)
, activeevents(activeevents)
, is_stopping(false)
{
}
bool InputProcessor::process(const std::vector<event_t>& events, size_t pos, double resample_ratio)
{
for(const auto& event: events)
{
if(event.type == TYPE_ONSET)
{
if(!process_onset(event, pos, resample_ratio))
{
continue;
}
}
if(!process_stop(event))
{
return false;
}
}
return true;
}
bool InputProcessor::process_onset(const event_t& event, size_t pos, double resample_ratio)
{
Instrument* i = nullptr;
int d = event.instrument;
// TODO can this be removed?
if(!kit.isValid())
{
return false;
}
if(d < (int)kit.instruments.size())
{
i = kit.instruments[d];
}
if(i == nullptr || !i->isValid())
{
ERR(inputprocessor, "Missing Instrument %d.\n", (int)event.instrument);
return false;
}
if(i->getGroup() != "")
{
// Add event to ramp down all existing events with the same groupname.
Channels::iterator j = kit.channels.begin();
while(j != kit.channels.end())
{
Channel &ch = *j;
std::list< Event* >::iterator evs = activeevents[ch.num].begin();
while(evs != activeevents[ch.num].end())
{
Event *ev = *evs;
if(ev->getType() == Event::sample)
{
EventSample *sev = (EventSample*)ev;
if(sev->group == i->getGroup() && sev->instrument != i)
{
sev->rampdown = 3000; // Ramp down 3000 samples
// TODO: This must be configurable at some point...
// ... perhaps even by instrument (ie. in the xml file)
sev->ramp_start = sev->rampdown;
}
}
++evs;
}
++j;
}
}
Sample *s = i->sample(event.velocity, event.offset + pos);
if(s == nullptr)
{
ERR(inputprocessor, "Missing Sample.\n");
return false;
}
Channels::iterator j = kit.channels.begin();
while(j != kit.channels.end())
{
Channel &ch = *j;
AudioFile *af = s->getAudioFile(&ch);
if(af)
{
// LAZYLOAD:
// DEBUG(inputprocessor, "Requesting preparing of audio file\n");
// loader.prepare(af);
}
if(af == nullptr || !af->isValid())
{
//DEBUG(inputprocessor, "Missing AudioFile.\n");
}
else
{
//DEBUG(inputprocessor, "Adding event %d.\n", event.offset);
Event *evt = new EventSample(ch.num, 1.0, af, i->getGroup(), i);
evt->offset = (event.offset + pos) * resample_ratio;
activeevents[ch.num].push_back(evt);
}
++j;
}
return true;
}
bool InputProcessor::process_stop(const event_t& event)
{
if(event.type == TYPE_STOP)
{
is_stopping = true;
}
if(is_stopping)
{
// Count the number of active events.
int num_active_events = 0;
Channels::iterator j = kit.channels.begin();
while(j != kit.channels.end())
{
Channel &ch = *j;
num_active_events += activeevents[ch.num].size();
++j;
}
if(num_active_events == 0)
{
// No more active events - now we can stop the engine.
return false;
}
}
return true;
}
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