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visualize.cpp
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visualize.cpp
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/*
visualize.cpp
(c) 2003 Thor Sigvaldason and Isaac Richards
VERY closely based on code from mq3 by Brad Hughes
Part of the mythTV project
music visualizers
*/
// C
#include <cmath>
// C++
#include <iostream>
using namespace std;
// Qt
#include <QCoreApplication>
#include <QPainter>
#include <QImage>
// MythTV
#include <mythdbcon.h>
#include <mythcontext.h>
#include <mythuihelper.h>
// mythmusic
#include "mainvisual.h"
#include "visualize.h"
#include "inlines.h"
#include "decoder.h"
#include "metadata.h"
#include "musicplayer.h"
#define FFTW_N 512
// static_assert(FFTW_N==SAMPLES_DEFAULT_SIZE)
VisFactory* VisFactory::g_pVisFactories = 0;
VisualBase::VisualBase(bool screensaverenable)
: m_fps(20), m_xscreensaverenable(screensaverenable)
{
if (!m_xscreensaverenable)
GetMythUI()->DoDisableScreensaver();
}
VisualBase::~VisualBase()
{
//
// This is only here so
// that derived classes
// can destruct properly
//
if (!m_xscreensaverenable)
GetMythUI()->DoRestoreScreensaver();
}
void VisualBase::drawWarning(QPainter *p, const QColor &back, const QSize &size, QString warning, int fontSize)
{
p->fillRect(0, 0, size.width(), size.height(), back);
p->setPen(Qt::white);
QFont font = GetMythUI()->GetMediumFont();
font.setPointSizeF(fontSize * (size.width() / 800.0));
p->setFont(font);
p->drawText(0, 0, size.width(), size.height(), Qt::AlignVCenter | Qt::AlignHCenter | Qt::TextWordWrap, warning);
}
///////////////////////////////////////////////////////////////////////////////
// LogScale
LogScale::LogScale(int maxscale, int maxrange)
: indices(0), s(0), r(0)
{
setMax(maxscale, maxrange);
}
LogScale::~LogScale()
{
if (indices)
delete [] indices;
}
void LogScale::setMax(int maxscale, int maxrange)
{
if (maxscale == 0 || maxrange == 0)
return;
s = maxscale;
r = maxrange;
if (indices)
delete [] indices;
double alpha;
int i, scaled;
long double domain = (long double) maxscale;
long double range = (long double) maxrange;
long double x = 1.0;
long double dx = 1.0;
long double y = 0.0;
long double yy = 0.0;
long double t = 0.0;
long double e4 = 1.0E-8;
indices = new int[maxrange];
for (i = 0; i < maxrange; i++)
indices[i] = 0;
// initialize log scale
for (uint i=0; i<10000 && (std::abs(dx) > e4); i++)
{
t = std::log((domain + x) / x);
y = (x * t) - range;
yy = t - (domain / (x + domain));
dx = y / yy;
x -= dx;
}
alpha = x;
for (i = 1; i < (int) domain; i++)
{
scaled = (int) floor(0.5 + (alpha * log((double(i) + alpha) / alpha)));
if (scaled < 1)
scaled = 1;
if (indices[scaled - 1] < i)
indices[scaled - 1] = i;
}
}
int LogScale::operator[](int index)
{
return indices[index];
}
///////////////////////////////////////////////////////////////////////////////
// StereoScope
#define RUBBERBAND 0
#define TWOCOLOUR 0
StereoScope::StereoScope() :
startColor(Qt::green), targetColor(Qt::red),
rubberband(RUBBERBAND), falloff(1.0)
{
m_fps = 45;
}
StereoScope::~StereoScope()
{
}
void StereoScope::resize( const QSize &newsize )
{
size = newsize;
uint os = magnitudes.size();
magnitudes.resize( size.width() * 2 );
for ( ; os < magnitudes.size(); os++ )
magnitudes[os] = 0.0;
}
bool StereoScope::process( VisualNode *node )
{
bool allZero = true;
if (node)
{
double index = 0;
double const step = (double)SAMPLES_DEFAULT_SIZE / size.width();
for ( int i = 0; i < size.width(); i++)
{
unsigned long indexTo = (unsigned long)(index + step);
if (indexTo == (unsigned long)(index))
indexTo = (unsigned long)(index + 1);
double valL = 0, valR = 0;
#if RUBBERBAND
if ( rubberband ) {
valL = magnitudes[ i ];
valR = magnitudes[ i + size.width() ];
if (valL < 0.) {
valL += falloff;
if ( valL > 0. )
valL = 0.;
}
else
{
valL -= falloff;
if ( valL < 0. )
valL = 0.;
}
if (valR < 0.)
{
valR += falloff;
if ( valR > 0. )
valR = 0.;
}
else
{
valR -= falloff;
if ( valR < 0. )
valR = 0.;
}
}
#endif
for (unsigned long s = (unsigned long)index; s < indexTo && s < node->length; s++)
{
double tmpL = ( ( node->left ?
double( node->left[s] ) : 0.) *
double( size.height() / 4 ) ) / 32768.;
double tmpR = ( ( node->right ?
double( node->right[s]) : 0.) *
double( size.height() / 4 ) ) / 32768.;
if (tmpL > 0)
valL = (tmpL > valL) ? tmpL : valL;
else
valL = (tmpL < valL) ? tmpL : valL;
if (tmpR > 0)
valR = (tmpR > valR) ? tmpR : valR;
else
valR = (tmpR < valR) ? tmpR : valR;
}
if (valL != 0. || valR != 0.)
allZero = false;
magnitudes[ i ] = valL;
magnitudes[ i + size.width() ] = valR;
index = index + step;
}
#if RUBBERBAND
}
else if (rubberband)
{
for ( int i = 0; i < size.width(); i++)
{
double valL = magnitudes[ i ];
if (valL < 0) {
valL += 2;
if (valL > 0.)
valL = 0.;
} else {
valL -= 2;
if (valL < 0.)
valL = 0.;
}
double valR = magnitudes[ i + size.width() ];
if (valR < 0.) {
valR += falloff;
if (valR > 0.)
valR = 0.;
}
else
{
valR -= falloff;
if (valR < 0.)
valR = 0.;
}
if (valL != 0. || valR != 0.)
allZero = false;
magnitudes[ i ] = valL;
magnitudes[ i + size.width() ] = valR;
}
#endif
}
else
{
for ( int i = 0; (unsigned) i < magnitudes.size(); i++ )
magnitudes[ i ] = 0.;
}
return allZero;
}
bool StereoScope::draw( QPainter *p, const QColor &back )
{
p->fillRect(0, 0, size.width(), size.height(), back);
for ( int i = 1; i < size.width(); i++ )
{
#if TWOCOLOUR
double r, g, b, per;
// left
per = double( magnitudes[ i ] * 2 ) /
double( size.height() / 4 );
if (per < 0.0)
per = -per;
if (per > 1.0)
per = 1.0;
else if (per < 0.0)
per = 0.0;
r = startColor.red() + (targetColor.red() -
startColor.red()) * (per * per);
g = startColor.green() + (targetColor.green() -
startColor.green()) * (per * per);
b = startColor.blue() + (targetColor.blue() -
startColor.blue()) * (per * per);
if (r > 255.0)
r = 255.0;
else if (r < 0.0)
r = 0;
if (g > 255.0)
g = 255.0;
else if (g < 0.0)
g = 0;
if (b > 255.0)
b = 255.0;
else if (b < 0.0)
b = 0;
p->setPen( QColor( int(r), int(g), int(b) ) );
#else
p->setPen(Qt::red);
#endif
p->drawLine( i - 1, (int)((size.height() / 4) + magnitudes[i - 1]),
i, (int)((size.height() / 4) + magnitudes[i]));
#if TWOCOLOUR
// right
per = double( magnitudes[ i + size.width() ] * 2 ) /
double( size.height() / 4 );
if (per < 0.0)
per = -per;
if (per > 1.0)
per = 1.0;
else if (per < 0.0)
per = 0.0;
r = startColor.red() + (targetColor.red() -
startColor.red()) * (per * per);
g = startColor.green() + (targetColor.green() -
startColor.green()) * (per * per);
b = startColor.blue() + (targetColor.blue() -
startColor.blue()) * (per * per);
if (r > 255.0)
r = 255.0;
else if (r < 0.0)
r = 0;
if (g > 255.0)
g = 255.0;
else if (g < 0.0)
g = 0;
if (b > 255.0)
b = 255.0;
else if (b < 0.0)
b = 0;
p->setPen( QColor( int(r), int(g), int(b) ) );
#else
p->setPen(Qt::red);
#endif
p->drawLine( i - 1, (int)((size.height() * 3 / 4) +
magnitudes[i + size.width() - 1]),
i, (int)((size.height() * 3 / 4) +
magnitudes[i + size.width()]));
}
return true;
}
///////////////////////////////////////////////////////////////////////////////
// MonoScope
MonoScope::MonoScope()
{
}
MonoScope::~MonoScope()
{
}
bool MonoScope::process( VisualNode *node )
{
bool allZero = true;
if (node)
{
double index = 0;
double const step = (double)SAMPLES_DEFAULT_SIZE / size.width();
for (int i = 0; i < size.width(); i++)
{
unsigned long indexTo = (unsigned long)(index + step);
if (indexTo == (unsigned long)index)
indexTo = (unsigned long)(index + 1);
double val = 0;
#if RUBBERBAND
if ( rubberband )
{
val = magnitudes[ i ];
if (val < 0.)
{
val += falloff;
if ( val > 0. )
{
val = 0.;
}
}
else
{
val -= falloff;
if ( val < 0. )
{
val = 0.;
}
}
}
#endif
for (unsigned long s = (unsigned long)index; s < indexTo && s < node->length; s++)
{
double tmp = ( double( node->left[s] ) +
(node->right ? double( node->right[s] ) : 0) *
double( size.height() / 2 ) ) / 65536.;
if (tmp > 0)
{
val = (tmp > val) ? tmp : val;
}
else
{
val = (tmp < val) ? tmp : val;
}
}
if ( val != 0. )
{
allZero = false;
}
magnitudes[ i ] = val;
index = index + step;
}
}
#if RUBBERBAND
else if (rubberband)
{
for (int i = 0; i < size.width(); i++) {
double val = magnitudes[ i ];
if (val < 0) {
val += 2;
if (val > 0.)
val = 0.;
} else {
val -= 2;
if (val < 0.)
val = 0.;
}
if ( val != 0. )
allZero = false;
magnitudes[ i ] = val;
}
}
#endif
else
{
for (int i = 0; i < size.width(); i++ )
magnitudes[ i ] = 0.;
}
return allZero;
}
bool MonoScope::draw( QPainter *p, const QColor &back )
{
p->fillRect( 0, 0, size.width(), size.height(), back );
for ( int i = 1; i < size.width(); i++ ) {
#if TWOCOLOUR
double r, g, b, per;
per = double( magnitudes[ i ] ) /
double( size.height() / 4 );
if (per < 0.0)
per = -per;
if (per > 1.0)
per = 1.0;
else if (per < 0.0)
per = 0.0;
r = startColor.red() + (targetColor.red() -
startColor.red()) * (per * per);
g = startColor.green() + (targetColor.green() -
startColor.green()) * (per * per);
b = startColor.blue() + (targetColor.blue() -
startColor.blue()) * (per * per);
if (r > 255.0)
r = 255.0;
else if (r < 0.0)
r = 0;
if (g > 255.0)
g = 255.0;
else if (g < 0.0)
g = 0;
if (b > 255.0)
b = 255.0;
else if (b < 0.0)
b = 0;
p->setPen(QColor(int(r), int(g), int(b)));
#else
p->setPen(Qt::red);
#endif
p->drawLine( i - 1, (int)(size.height() / 2 + magnitudes[ i - 1 ]),
i, (int)(size.height() / 2 + magnitudes[ i ] ));
}
return true;
}
///////////////////////////////////////////////////////////////////////////////
// StereoScopeFactory
static class StereoScopeFactory : public VisFactory
{
public:
const QString &name(void) const
{
static QString name = QCoreApplication::translate("Visualizers",
"StereoScope");
return name;
}
uint plugins(QStringList *list) const
{
*list << name();
return 1;
}
VisualBase *create(MainVisual *parent, const QString &pluginName) const
{
(void)parent;
(void)pluginName;
return new StereoScope();
}
}StereoScopeFactory;
///////////////////////////////////////////////////////////////////////////////
// MonoScopeFactory
static class MonoScopeFactory : public VisFactory
{
public:
const QString &name(void) const
{
static QString name = QCoreApplication::translate("Visualizers",
"MonoScope");
return name;
}
uint plugins(QStringList *list) const
{
*list << name();
return 1;
}
VisualBase *create(MainVisual *parent, const QString &pluginName) const
{
(void)parent;
(void)pluginName;
return new MonoScope();
}
}MonoScopeFactory;
///////////////////////////////////////////////////////////////////////////////
// Spectrum
//
// NOTE: This visualiser requires mythplugins to be compiled with --enable-fft
#if FFTW3_SUPPORT
Spectrum::Spectrum()
: lin(NULL), rin(NULL), lout(NULL), rout(NULL)
{
// Setup the "magical" audio data transformations
// provided by the Fast Fourier Transforms library
analyzerBarWidth = 6;
scaleFactor = 2.0;
falloff = 10.0;
m_fps = 15;
lin = (myth_fftw_float*) av_malloc(sizeof(myth_fftw_float)*FFTW_N);
memset(lin, 0, sizeof(myth_fftw_float)*FFTW_N);
rin = (myth_fftw_float*) av_malloc(sizeof(myth_fftw_float)*FFTW_N);
memset(rin, 0, sizeof(myth_fftw_float)*FFTW_N);
lout = (myth_fftw_complex*) av_malloc(sizeof(myth_fftw_complex)*(FFTW_N/2+1));
memset(lout, 0, sizeof(myth_fftw_complex)*(FFTW_N/2+1));
rout = (myth_fftw_complex*) av_malloc(sizeof(myth_fftw_complex)*(FFTW_N/2+1));
memset(rout, 0, sizeof(myth_fftw_complex)*(FFTW_N/2+1));
lplan = fftw_plan_dft_r2c_1d(FFTW_N, lin, (myth_fftw_complex_cast*)lout, FFTW_MEASURE);
rplan = fftw_plan_dft_r2c_1d(FFTW_N, rin, (myth_fftw_complex_cast*)rout, FFTW_MEASURE);
startColor = QColor(0,0,255);
targetColor = QColor(255,0,0);
}
Spectrum::~Spectrum()
{
if (lin)
av_free(lin);
if (rin)
av_free(rin);
if (lout)
av_free(lout);
if (rout)
av_free(rout);
fftw_destroy_plan(lplan);
fftw_destroy_plan(rplan);
}
void Spectrum::resize(const QSize &newsize)
{
// Just change internal data about the
// size of the pixmap to be drawn (ie. the
// size of the screen) and the logically
// ensuing number of up/down bars to hold
// the audio magnitudes
size = newsize;
analyzerBarWidth = size.width() / 64;
if (analyzerBarWidth < 6)
analyzerBarWidth = 6;
scale.setMax(192, size.width() / analyzerBarWidth);
rects.resize( scale.range() );
unsigned int i = 0;
int w = 0;
for (; i < (uint)rects.size(); i++, w += analyzerBarWidth)
{
rects[i].setRect(w, size.height() / 2, analyzerBarWidth - 1, 1);
}
unsigned int os = magnitudes.size();
magnitudes.resize( scale.range() * 2 );
for (; os < (uint)magnitudes.size(); os++)
{
magnitudes[os] = 0.0;
}
scaleFactor = double( size.height() / 2 ) / log( (double)(FFTW_N) );
}
template<typename T> T sq(T a) { return a*a; };
bool Spectrum::process(VisualNode *node)
{
// Take a bunch of data in *node
// and break it down into spectrum
// values
bool allZero = true;
uint i;
long w = 0, index;
QRect *rectsp = rects.data();
double *magnitudesp = magnitudes.data();
double magL, magR, tmp;
if (node)
{
i = node->length;
if (i > FFTW_N)
i = FFTW_N;
fast_real_set_from_short(lin, node->left, i);
if (node->right)
fast_real_set_from_short(rin, node->right, i);
}
else
i = 0;
fast_reals_set(lin + i, rin + i, 0, FFTW_N - i);
fftw_execute(lplan);
fftw_execute(rplan);
index = 1;
for (i = 0; (int)i < rects.size(); i++, w += analyzerBarWidth)
{
magL = (log(sq(real(lout[index])) + sq(real(lout[FFTW_N - index]))) - 22.0) *
scaleFactor;
magR = (log(sq(real(rout[index])) + sq(real(rout[FFTW_N - index]))) - 22.0) *
scaleFactor;
if (magL > size.height() / 2)
{
magL = size.height() / 2;
}
if (magL < magnitudesp[i])
{
tmp = magnitudesp[i] - falloff;
if ( tmp < magL )
{
tmp = magL;
}
magL = tmp;
}
if (magL < 1.)
{
magL = 1.;
}
if (magR > size.height() / 2)
{
magR = size.height() / 2;
}
if (magR < magnitudesp[i + scale.range()])
{
tmp = magnitudesp[i + scale.range()] - falloff;
if ( tmp < magR )
{
tmp = magR;
}
magR = tmp;
}
if (magR < 1.)
{
magR = 1.;
}
if (magR != 1 || magL != 1)
{
allZero = false;
}
magnitudesp[i] = magL;
magnitudesp[i + scale.range()] = magR;
rectsp[i].setTop( size.height() / 2 - int( magL ) );
rectsp[i].setBottom( size.height() / 2 + int( magR ) );
index = scale[i];
}
return false;
}
double Spectrum::clamp(double cur, double max, double min)
{
if (cur > max)
cur = max;
if (cur < min)
cur = min;
return cur;
}
bool Spectrum::draw(QPainter *p, const QColor &back)
{
// This draws on a pixmap owned by MainVisual.
//
// In other words, this is not a Qt Widget, it
// just uses some Qt methods to draw on a pixmap.
// MainVisual then bitblts that onto the screen.
QRect *rectsp = rects.data();
double r, g, b, per;
p->fillRect(0, 0, size.width(), size.height(), back);
for (uint i = 0; i < (uint)rects.size(); i++)
{
per = double( rectsp[i].height() - 2 ) / double( size.height() );
per = clamp(per, 1.0, 0.0);
r = startColor.red() +
(targetColor.red() - startColor.red()) * (per * per);
g = startColor.green() +
(targetColor.green() - startColor.green()) * (per * per);
b = startColor.blue() +
(targetColor.blue() - startColor.blue()) * (per * per);
r = clamp(r, 255.0, 0.0);
g = clamp(g, 255.0, 0.0);
b = clamp(b, 255.0, 0.0);
if(rectsp[i].height() > 4)
p->fillRect(rectsp[i], QColor(int(r), int(g), int(b)));
}
return true;
}
static class SpectrumFactory : public VisFactory
{
public:
const QString &name(void) const
{
static QString name = QCoreApplication::translate("Visualizers",
"Spectrum");
return name;
}
uint plugins(QStringList *list) const
{
*list << name();
return 1;
}
VisualBase *create(MainVisual *parent, const QString &pluginName) const
{
(void)parent;
(void)pluginName;
return new Spectrum();
}
}SpectrumFactory;
///////////////////////////////////////////////////////////////////////////////
// Squares
//
// NOTE: This visualiser requires mythplugins to be compiled with --enable-fftw
Squares::Squares() :
size(0,0), pParent(NULL), fake_height(0), number_of_squares(16)
{
fake_height = number_of_squares * analyzerBarWidth;
}
Squares::~Squares()
{
}
void Squares::resize (const QSize &newsize) {
// Trick the spectrum analyzer into calculating 16 rectangles
Spectrum::resize (QSize (fake_height, fake_height));
// We have our own copy, Spectrum has it's own...
size = newsize;
}
void Squares::drawRect(QPainter *p, QRect *rect, int i, int c, int w, int h)
{
double r, g, b, per;
int correction = (size.width() % rects.size ()) / 2;
int x = ((i / 2) * w) + correction;
int y;
if (i % 2 == 0)
{
y = c - h;
per = double(fake_height - rect->top()) / double(fake_height);
}
else
{
y = c;
per = double(rect->bottom()) / double(fake_height);
}
per = clamp(per, 1.0, 0.0);
r = startColor.red() +
(targetColor.red() - startColor.red()) * (per * per);
g = startColor.green() +
(targetColor.green() - startColor.green()) * (per * per);
b = startColor.blue() +
(targetColor.blue() - startColor.blue()) * (per * per);
r = clamp(r, 255.0, 0.0);
g = clamp(g, 255.0, 0.0);
b = clamp(b, 255.0, 0.0);
p->fillRect (x, y, w, h, QColor (int(r), int(g), int(b)));
}
bool Squares::draw(QPainter *p, const QColor &back)
{
p->fillRect (0, 0, size.width (), size.height (), back);
int w = size.width () / (rects.size () / 2);
int h = w;
int center = size.height () / 2;
QRect *rectsp = rects.data();
for (uint i = 0; i < (uint)rects.size(); i++)
drawRect(p, &(rectsp[i]), i, center, w, h);
return true;
}
static class SquaresFactory : public VisFactory
{
public:
const QString &name(void) const
{
static QString name = QCoreApplication::translate("Visualizers",
"Squares");
return name;
}
uint plugins(QStringList *list) const
{
*list << name();
return 1;
}
VisualBase *create(MainVisual *parent, const QString &pluginName) const
{
(void)parent;
(void)pluginName;
return new Squares();
}
}SquaresFactory;
#endif // FFTW3_SUPPORT
Piano::Piano()
: piano_data(NULL), audio_data(NULL)
{
// Setup the "magical" audio coefficients
// required by the Goetzel Algorithm
LOG(VB_GENERAL, LOG_DEBUG, QString("Piano : Being Initialised"));
piano_data = (piano_key_data *) malloc(sizeof(piano_key_data) * PIANO_N);
audio_data = (piano_audio *) malloc(sizeof(piano_audio) * PIANO_AUDIO_SIZE);
double sample_rate = 44100.0; // TODO : This should be obtained from gPlayer (likely candidate...)
m_fps = 20; // This is the display frequency. We're capturing all audio chunks by defining .process_undisplayed() though.
double concert_A = 440.0;
double semi_tone = pow(2.0, 1.0/12.0);
/* Lowest note on piano is 4 octaves below concert A */
double bottom_A = concert_A / 2.0 / 2.0 / 2.0 / 2.0;
unsigned int key;
double current_freq = bottom_A, samples_required;
for (key = 0; key < PIANO_N; key++)
{
// This is constant through time
piano_data[key].coeff = (goertzel_data)(2.0 * cos(2.0 * M_PI * current_freq / sample_rate));
samples_required = sample_rate/current_freq * 20.0; // Want 20 whole cycles of the current waveform at least
if (samples_required > sample_rate/4.0)
{
// For the really low notes, 4 updates a second is good enough...
samples_required = sample_rate/4.0;
}
if (samples_required < sample_rate/(double)m_fps * 0.75)
{ // For the high notes, use as many samples as we need in a display_fps
samples_required = sample_rate/(double)m_fps * 0.75;
}
piano_data[key].samples_process_before_display_update = (int)samples_required;
piano_data[key].is_black_note = false; // Will be put right in .resize()
current_freq *= semi_tone;
}
zero_analysis();
whiteStartColor = QColor(245,245,245);
whiteTargetColor = Qt::red;
blackStartColor = QColor(10,10,10);
blackTargetColor = Qt::red;
}
Piano::~Piano()
{
if (piano_data)
free(piano_data);
if (audio_data)
free(audio_data);
}
void Piano::zero_analysis(void)
{
unsigned int key;
for (key = 0; key < PIANO_N; key++)
{
// These get updated continously, and must be stored between chunks of audio data
piano_data[key].q2 = (goertzel_data)0.0f;
piano_data[key].q1 = (goertzel_data)0.0f;
piano_data[key].magnitude = (goertzel_data)0.0f;
piano_data[key].max_magnitude_seen =
(goertzel_data)(PIANO_RMS_NEGLIGIBLE*PIANO_RMS_NEGLIGIBLE); // This is a guess - will be quickly overwritten
piano_data[key].samples_processed = 0;
}
offset_processed = 0;