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Add boom and rainbow analyzers

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This commit is contained in:
Jonas Kvinge
2019-02-04 21:34:12 +01:00
parent ad7084b897
commit 0679b78c1d
17 changed files with 973 additions and 296 deletions
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69
src/analyzer/analyzerbase.cpp
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@@ -1,32 +1,40 @@
/***************************************************************************
viswidget.cpp - description
-------------------
begin : Die Jan 7 2003
copyright : (C) 2003 by Max Howell
email : markey@web.de
***************************************************************************/
/*
Strawberry Music Player
This file was part of Amarok.
Copyright 2003-2004, Max Howell <max.howell@methylblue.com>
Copyright 2009-2012, David Sansome <me@davidsansome.com>
Copyright 2010, 2012, 2014, John Maguire <john.maguire@gmail.com>
Copyright 2017, Santiago Gil
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
Strawberry 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 3 of the License, or
(at your option) any later version.
Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "analyzerbase.h"
#include <algorithm>
#include <cmath>
#include <cstdint>
#include <QWidget>
#include <QVector>
#include <QPainter>
#include <QPalette>
#include <QTimerEvent>
#include <QtEvents>
#include "analyzerbase.h"
#include "core/logging.h"
#include "engine/enginebase.h"
@@ -36,10 +44,11 @@
// 3. reimplement analyze(), and paint to canvas(), Base2D will update the widget when you return control to it
// 4. if you want to manipulate the scope, reimplement transform()
// 5. for convenience <vector> <qpixmap.h> <qwdiget.h> are pre-included
// TODO make an INSTRUCTIONS file
//
// TODO:
// Make an INSTRUCTIONS file
// can't mod scope in analyze you have to use transform
// TODO for 2D use setErasePixmap Qt function insetead of m_background
// for 2D use setErasePixmap Qt function insetead of m_background
// make the linker happy only for gcc < 4.0
#if !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 0)) && \
@@ -53,7 +62,6 @@ Analyzer::Base::Base(QWidget *parent, uint scopeSize)
fht_(new FHT(scopeSize)),
engine_(nullptr),
lastscope_(512),
current_chunk_(0),
new_frame_(false),
is_playing_(false) {}
@@ -63,19 +71,18 @@ void Analyzer::Base::showEvent(QShowEvent*) { timer_.start(timeout(), this); }
void Analyzer::Base::transform(Scope& scope) {
// This is a standard transformation that should give an FFT scope that has bands for pretty analyzers
QVector<float> aux(fht_->size());
if (aux.size() >= scope.size()) {
std::copy(scope.begin(), scope.end(), aux.begin());
}
else {
std::copy(scope.begin(), scope.begin() + aux.size(), aux.begin());
}
// NOTE: Resizing here is redundant as FHT routines only calculate FHT::size() values scope.resize( fht_->size() );
float *front = static_cast<float*>(&scope.front());
float *f = new float[fht_->size()];
fht_->copy(&f[0], front);
fht_->logSpectrum(front, &f[0]);
fht_->scale(front, 1.0 / 20);
fht_->logSpectrum(scope.data(), aux.data());
fht_->scale(scope.data(), 1.0 / 20);
scope.resize(fht_->size() / 2); // second half of values are rubbish
delete[] f;
}