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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* powerlist.cc
*
* Sun Jul 28 19:45:48 CEST 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* 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 "powerlist.h"
#include <algorithm>
#include <stdlib.h>
#include <string.h>
#include <hugin.hpp>
// M_PI is not defined in math.h if __STRICT_ANSI__ is defined.
#ifdef __STRICT_ANSI__
#undef __STRICT_ANSI__
#endif
#include <math.h>
#include "random.h"
#include "settings.h"
namespace
{
// Enable to calculate power on old samples without power attribute
//#define AUTO_CALCULATE_POWER
unsigned int const LOAD_SIZE = 500u;
} // end anonymous namespace
PowerList::PowerList()
{
power_max = 0;
power_min = 100000000;
}
void PowerList::add(Sample* sample)
{
PowerListItem item;
item.power = -1;
item.sample = sample;
samples.push_back(item);
}
// FIXME: remove all?
const Channel* PowerList::getMasterChannel()
{
std::map<const Channel*, int> count;
for (auto& item: samples)
{
Sample* sample{item.sample};
const Channel* max_channel{nullptr};
sample_t max_val{0};
for (auto& pair: sample->audiofiles)
{
const Channel* c = pair.first;
AudioFile* af = pair.second;
af->load(nullptr, LOAD_SIZE);
float silence{0.f};
std::size_t silence_length{4u};
for (auto s = af->size; s > 0 && s > af->size - silence_length; --s)
{
silence += af->data[s];
}
silence /= silence_length;
for(auto s = 0u; s < af->size; ++s)
{
float val = af->data[s] * af->data[s] * (1.0 / (float)(s + 1));
if(val > max_val)
{
max_val = val;
max_channel = c;
break;
}
}
af->unload();
}
if(max_channel)
{
if(count.find(max_channel) == count.end())
{
count[max_channel] = 0;
}
++count[max_channel];
}
}
const Channel* master{nullptr};
int max_count{-1};
for (auto& pair: count)
{
if (pair.second > max_count && pair.first->name.find("Alesis") == 0u)
{
master = pair.first;
max_count = pair.second;
}
}
return master;
}
// FIXME: clean up significantly!
void PowerList::finalise()
{
#ifdef AUTO_CALCULATE_POWER
const Channel* master_channel = getMasterChannel();
if(master_channel == nullptr)
{
ERR(rand, "No master channel found!\n");
return; // This should not happen...
}
DEBUG(rand, "Master channel: %s\n", master_channel->name.c_str());
#endif /*AUTO_CALCULATE_POWER*/
for (auto& item: samples)
{
Sample* sample = item.sample;
#ifdef AUTO_CALCULATE_POWER
DEBUG(rand, "Sample: %s\n", sample->name.c_str());
AudioFile* master{nullptr};
for (auto& af: sample->audiofiles)
{
if (af.first->name == master_channel->name)
{
master = af.second;
break;
}
}
if(master == nullptr)
{
continue;
}
master->load();
#endif /*AUTO_CALCULATE_POWER*/
#ifdef AUTO_CALCULATE_POWER
if(sample->power == -1)
{ // Power not defined. Calculate it!
DEBUG(powerlist, "Calculating power\n");
float power{0.f};
for(auto s = 0u; s < LOAD_SIZE && s < master->size; ++s)
{
power += master->data[s] * master->data[s];
}
power = sqrt(power);
sample->power = power;
}
#endif /*AUTO_CALCULATE_POWER*/
item.power = sample->power;
if(item.power > power_max)
{
power_max = item.power;
}
if(item.power < power_min)
{
power_min = item.power;
}
DEBUG(rand, " - power: %f\n", item.power);
}
std::sort(samples.begin(), samples.end());
}
const PowerListItems& PowerList::getPowerListItems() const
{
return samples;
}
float PowerList::getMaxPower() const
{
return power_max;
}
float PowerList::getMinPower() const
{
return power_min;
}
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