***************************************************************************/
#include <QPainter>
+#include <QMenu>
#include "spectrogram.h"
// Can be less as a pre-rendered image is kept in space.
#define SPECTROGRAM_HISTORY_SIZE 1000
+// Uncomment for debugging
//#define DEBUG_SPECTROGRAM
+
#ifdef DEBUG_SPECTROGRAM
#include <QDebug>
#endif
+#define MIN_DB_VALUE -120
+#define MAX_FREQ_VALUE 96000
+#define MIN_FREQ_VALUE 1000
+
Spectrogram::Spectrogram(QWidget *parent) :
- AbstractAudioScopeWidget(false, parent),
+ AbstractAudioScopeWidget(true, parent),
m_fftTools(),
m_fftHistory(),
- m_fftHistoryImg()
+ m_fftHistoryImg(),
+ m_parameterChanged(false)
{
ui = new Ui::Spectrogram_UI;
ui->setupUi(this);
+ m_aResetHz = new QAction(i18n("Reset maximum frequency to sampling rate"), this);
+
+
+ m_menu->addSeparator();
+ m_menu->addAction(m_aResetHz);
+ m_menu->removeAction(m_aRealtime);
ui->windowSize->addItem("256", QVariant(256));
ui->windowFunction->addItem(i18n("Triangular window"), FFTTools::Window_Triangle);
ui->windowFunction->addItem(i18n("Hamming window"), FFTTools::Window_Hamming);
+ // Note: These strings are used in both Spectogram and AudioSpectrum. Ideally change both (if necessary) to reduce workload on translators
+ ui->labelFFTSize->setToolTip(i18n("The maximum window size is limited by the number of samples per frame."));
+ ui->windowSize->setToolTip(i18n("A bigger window improves the accuracy at the cost of computational power."));
+ ui->windowFunction->setToolTip(i18n("The rectangular window function is good for signals with equal signal strength (narrow peak), but creates more smearing. See Window function on Wikipedia."));
+
bool b = true;
+ b &= connect(m_aResetHz, SIGNAL(triggered()), this, SLOT(slotResetMaxFreq()));
b &= connect(ui->windowFunction, SIGNAL(currentIndexChanged(int)), this, SLOT(forceUpdate()));
+ b &= connect(this, SIGNAL(signalMousePositionChanged()), this, SLOT(forceUpdateHUD()));
Q_ASSERT(b);
AbstractScopeWidget::init();
Spectrogram::~Spectrogram()
{
writeConfig();
+
+ delete m_aResetHz;
}
void Spectrogram::readConfig()
);
m_innerScopeRect = QRect(
QPoint(
- m_scopeRect.left()+6, // Left
+ m_scopeRect.left()+56, // Left
m_scopeRect.top()+6 // Top
), QPoint(
ui->verticalSpacer->geometry().right()-70,
return m_scopeRect;
}
-QImage Spectrogram::renderHUD(uint) { return QImage(); }
+QImage Spectrogram::renderHUD(uint)
+{
+
+ QTime start = QTime::currentTime();
+
+ int x, y;
+ const uint minDistY = 30; // Minimum distance between two lines
+ const uint minDistX = 40;
+ const uint textDistX = 10;
+ const uint textDistY = 25;
+ const uint topDist = m_innerScopeRect.top() - m_scopeRect.top();
+ const uint leftDist = m_innerScopeRect.left() - m_scopeRect.left();
+ const uint mouseX = m_mousePos.x() - m_innerScopeRect.left();
+ const uint mouseY = m_mousePos.y() - m_innerScopeRect.top();
+ bool hideText;
+
+ QImage hud(m_scopeRect.size(), QImage::Format_ARGB32);
+ hud.fill(qRgba(0,0,0,0));
+
+ QPainter davinci(&hud);
+ davinci.setPen(AbstractScopeWidget::penLight);
+
+
+ // Frame display
+ for (int frameNumber = 0; frameNumber < m_innerScopeRect.height(); frameNumber += minDistY) {
+ y = topDist + m_innerScopeRect.height()-1 - frameNumber;
+ hideText = m_mouseWithinWidget && abs(y - mouseY) < textDistY && mouseY < m_innerScopeRect.height() && mouseX < m_innerScopeRect.width();
+
+ davinci.drawLine(leftDist, y, leftDist + m_innerScopeRect.width()-1, y);
+ if (!hideText) {
+ davinci.drawText(leftDist + m_innerScopeRect.width() + textDistX, y + 6, QVariant(frameNumber).toString());
+ }
+ }
+ // Draw a line through the mouse position with the correct Frame number
+ if (m_mouseWithinWidget && mouseY < m_innerScopeRect.height() && mouseX < m_innerScopeRect.width()) {
+ davinci.setPen(AbstractScopeWidget::penLighter);
+
+ x = leftDist + mouseX;
+ y = topDist + mouseY - 20;
+ if (y < 0) {
+ y = 0;
+ }
+ if (y > topDist + m_innerScopeRect.height()-1 - 30) {
+ y = topDist + m_innerScopeRect.height()-1 - 30;
+ }
+ davinci.drawLine(x, topDist + mouseY, leftDist + m_innerScopeRect.width()-1, topDist + mouseY);
+ davinci.drawText(leftDist + m_innerScopeRect.width() + textDistX,
+ y,
+ m_scopeRect.right()-m_innerScopeRect.right()-textDistX,
+ 40,
+ Qt::AlignLeft,
+ i18n("Frame\n%1", m_innerScopeRect.height()-1-mouseY));
+ }
+
+ // Frequency grid
+ const uint hzDiff = ceil( ((float)minDistX)/m_innerScopeRect.width() * m_freqMax / 1000 ) * 1000;
+ const int rightBorder = leftDist + m_innerScopeRect.width()-1;
+ x = 0;
+ y = topDist + m_innerScopeRect.height() + textDistY;
+ for (uint hz = 0; x <= rightBorder; hz += hzDiff) {
+ davinci.setPen(AbstractScopeWidget::penLight);
+ x = leftDist + (m_innerScopeRect.width()-1) * ((float)hz)/m_freqMax;
+
+ // Hide text if it would overlap with the text drawn at the mouse position
+ hideText = m_mouseWithinWidget && abs(x-(leftDist + mouseX + 18)) < minDistX && mouseX < m_innerScopeRect.width();
+
+ if (x <= rightBorder) {
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()+6);
+ }
+ if (x+textDistY < leftDist + m_innerScopeRect.width()) {
+ // Only draw the text label if there is still enough room for the final one at the right.
+ if (!hideText) {
+ davinci.drawText(x-4, y, QVariant(hz/1000).toString());
+ }
+ }
+
+
+ if (hz > 0) {
+ // Draw finer lines between the main lines
+ davinci.setPen(AbstractScopeWidget::penLightDots);
+ for (uint dHz = 3; dHz > 0; dHz--) {
+ x = leftDist + m_innerScopeRect.width() * ((float)hz - dHz * hzDiff/4.0f)/m_freqMax;
+ if (x > rightBorder) {
+ break;
+ }
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()-1);
+ }
+ }
+ }
+ // Draw the line at the very right (maximum frequency)
+ x = leftDist + m_innerScopeRect.width()-1;
+ hideText = m_mouseWithinWidget && abs(x-(leftDist + mouseX + 24)) < minDistX && mouseX < m_innerScopeRect.width();
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()+6);
+ if (!hideText) {
+ davinci.drawText(x-10, y, i18n("%1 kHz").arg((double)m_freqMax/1000, 0, 'f', 1));
+ }
+
+ // Draw a line through the mouse position with the correct frequency label
+ if (m_mouseWithinWidget && mouseX < m_innerScopeRect.width()) {
+ davinci.setPen(AbstractScopeWidget::penThin);
+ x = leftDist + mouseX;
+ davinci.drawLine(x, topDist, x, topDist + m_innerScopeRect.height()+6);
+ davinci.drawText(x-10, y, i18n("%1 kHz").arg((double)(m_mousePos.x()-m_innerScopeRect.left())/m_innerScopeRect.width() * m_freqMax/1000, 0, 'f', 1));
+ }
+
+ // Draw the dB brightness scale
+ float val;
+ davinci.setPen(AbstractScopeWidget::penLighter);
+ for (y = topDist; y < topDist + m_innerScopeRect.height(); y++) {
+ val = 1-((float)y-topDist)/(m_innerScopeRect.height()-1);
+ int col = qRgba(255, 255, 255, 255.0 * val);
+ for (x = leftDist-6; x >= leftDist-13; x--) {
+ hud.setPixel(x, y, col);
+ }
+ }
+ const int rectWidth = leftDist-m_scopeRect.left()-22;
+ const int rectHeight = 50;
+ davinci.setFont(QFont(QFont().defaultFamily(), 10));
+ davinci.drawText(m_scopeRect.left(), topDist, rectWidth, rectHeight, Qt::AlignRight, i18n("%1\ndB", m_dBmax));
+ davinci.drawText(m_scopeRect.left(), topDist + m_innerScopeRect.height()-20, rectWidth, rectHeight, Qt::AlignRight, i18n("%1\ndB", m_dBmin));
+
+
+ emit signalHUDRenderingFinished(start.elapsed(), 1);
+ return hud;
+}
QImage Spectrogram::renderAudioScope(uint, const QVector<int16_t> audioFrame, const int freq,
- const int num_channels, const int num_samples) {
+ const int num_channels, const int num_samples, const int newData) {
if (audioFrame.size() > 63) {
if (!m_customFreq) {
m_freqMax = freq / 2;
}
+ bool newDataAvailable = newData > 0;
+
+#ifdef DEBUG_SPECTROGRAM
+ qDebug() << "New data for " << widgetName() << ": " << newDataAvailable << " (" << newData << " units)";
+#endif
QTime start = QTime::currentTime();
// Show the window size used, for information
ui->labelFFTSizeNumber->setText(QVariant(fftWindow).toString());
+ if (newDataAvailable) {
- // Get the spectral power distribution of the input samples,
- // using the given window size and function
- float freqSpectrum[fftWindow/2];
- FFTTools::WindowType windowType = (FFTTools::WindowType) ui->windowFunction->itemData(ui->windowFunction->currentIndex()).toInt();
- m_fftTools.fftNormalized(audioFrame, 0, num_channels, freqSpectrum, windowType, fftWindow, 0);
+ float freqSpectrum[fftWindow/2];
- QVector<float> spectrumVector(fftWindow/2);
- memcpy(spectrumVector.data(), &freqSpectrum[0], fftWindow/2 * sizeof(float));
- m_fftHistory.prepend(spectrumVector);
+ // Get the spectral power distribution of the input samples,
+ // using the given window size and function
+ FFTTools::WindowType windowType = (FFTTools::WindowType) ui->windowFunction->itemData(ui->windowFunction->currentIndex()).toInt();
+ m_fftTools.fftNormalized(audioFrame, 0, num_channels, freqSpectrum, windowType, fftWindow, 0);
+
+ // This methid might be called also when a simple refresh is required.
+ // In this case there is no data to append to the history. Only append new data.
+ QVector<float> spectrumVector(fftWindow/2);
+ memcpy(spectrumVector.data(), &freqSpectrum[0], fftWindow/2 * sizeof(float));
+ m_fftHistory.prepend(spectrumVector);
+ }
+#ifdef DEBUG_SPECTROGRAM
+ else {
+ qDebug() << widgetName() << ": Has no new data to Fourier-transform";
+ }
+#endif
// Limit the maximum history size to avoid wasting space
while (m_fftHistory.size() > SPECTROGRAM_HISTORY_SIZE) {
float val;
uint windowSize;
uint xi;
- uint y = topDist;
+ uint y;
bool completeRedraw = true;
- if (m_fftHistoryImg.size() == m_scopeRect.size()) {
- // The size of the widget has not changed since last time, so we can re-use it,
- // shift it by one pixel, and render the single remaining line. Usually about
+ if (m_fftHistoryImg.size() == m_scopeRect.size() && !m_parameterChanged) {
+ // The size of the widget and the parameters (like min/max dB) have not changed since last time,
+ // so we can re-use it, shift it by one pixel, and render the single remaining line. Usually about
// 10 times faster for a widget height of around 400 px.
- davinci.drawImage(0, -1, m_fftHistoryImg);
+ if (newDataAvailable) {
+ davinci.drawImage(0, -1, m_fftHistoryImg);
+ } else {
+ // spectrum = m_fftHistoryImg does NOT work, leads to segfaults (anyone knows why, please tell me)
+ davinci.drawImage(0, 0, m_fftHistoryImg);
+ }
completeRedraw = false;
}
- for (QList<QVector<float> >::iterator it = m_fftHistory.begin(); it != m_fftHistory.end(); it++) {
+ y = 0;
+ if (newData || m_parameterChanged) {
+ m_parameterChanged = false;
- windowSize = (*it).size();
+ for (QList<QVector<float> >::iterator it = m_fftHistory.begin(); it != m_fftHistory.end(); it++) {
- for (uint i = 0; i < w; i++) {
+ windowSize = (*it).size();
- // i: Pixel coordinate
- // f: Target frequency
- // x: Frequency array index (float!) corresponding to the pixel
- // xi: floor(x)
- // val: dB value at position x (Range: [-inf,0])
+ for (uint i = 0; i < w; i++) {
- f = i/((float) w-1.0) * m_freqMax;
- x = 2*f/freq * (windowSize - 1);
- xi = (int) floor(x);
+ // i: Pixel coordinate
+ // f: Target frequency
+ // x: Frequency array index (float!) corresponding to the pixel
+ // xi: floor(x)
+ // val: dB value at position x (Range: [-inf,0])
- if (x >= windowSize) {
- break;
- }
+ f = i/((float) w-1.0) * m_freqMax;
+ x = 2*f/freq * (windowSize - 1);
+ xi = (int) floor(x);
+
+ if (x >= windowSize) {
+ break;
+ }
- // Use linear interpolation in order to get smoother display
- if (i == 0 || xi == windowSize-1) {
- // ... except if we are at the left or right border of the display or the spectrum
- val = (*it)[xi];
- } else {
-
- if ((*it)[xi] > (*it)[xi+1]
- && x_prev < xi) {
- // This is a hack to preserve peaks.
- // Consider f = {0, 100, 0}
- // x = {0.5, 1.5}
- // Then x is 50 both times, and the 100 peak is lost.
- // Get it back here for the first x after the peak.
+ // Use linear interpolation in order to get smoother display
+ if (i == 0 || xi == windowSize-1) {
+ // ... except if we are at the left or right border of the display or the spectrum
val = (*it)[xi];
} else {
- val = (xi+1 - x) * (*it)[xi]
- + (x - xi) * (*it)[xi+1];
+
+ if ((*it)[xi] > (*it)[xi+1]
+ && x_prev < xi) {
+ // This is a hack to preserve peaks.
+ // Consider f = {0, 100, 0}
+ // x = {0.5, 1.5}
+ // Then x is 50 both times, and the 100 peak is lost.
+ // Get it back here for the first x after the peak.
+ val = (*it)[xi];
+ } else {
+ val = (xi+1 - x) * (*it)[xi]
+ + (x - xi) * (*it)[xi+1];
+ }
}
- }
- // Normalize to [0 1], 1 corresponding to 0 dB and 0 to dbMin dB
- val = -val/m_dBmin + 1;
- if (val < 0) {
- val = 0;
- }
+ // Normalize to [0 1], 1 corresponding to 0 dB and 0 to dbMin dB
+ val = (val-m_dBmax)/(m_dBmax-m_dBmin) + 1;
+ if (val < 0) {
+ val = 0;
+ } else if (val > 1) {
+ val = 1;
+ }
- spectrum.setPixel(leftDist + i, topDist + h-y-1, qRgba(255, 255, 255, val * 255));
+ spectrum.setPixel(leftDist + i, topDist + h-1 - y, qRgba(255, 255, 255, val * 255));
- x_prev = x;
- }
+ x_prev = x;
+ }
- y++;
- if (y >= topDist + m_innerScopeRect.height()) {
- break;
- }
- if (!completeRedraw) {
- break;
+ y++;
+ if (y >= topDist + m_innerScopeRect.height()) {
+ break;
+ }
+ if (!completeRedraw) {
+ break;
+ }
}
}
#ifdef DEBUG_SPECTROGRAM
qDebug() << "Rendered " << y-topDist << "lines from " << m_fftHistory.size() << " available samples in " << start.elapsed() << " ms"
- << (completeRedraw ? " (re-used old image)" : "");
+ << (completeRedraw ? "" : " (re-used old image)");
uint storedBytes = 0;
for (QList< QVector<float> >::iterator it = m_fftHistory.begin(); it != m_fftHistory.end(); it++) {
storedBytes += (*it).size() * sizeof((*it)[0]);
QImage Spectrogram::renderBackground(uint) { return QImage(); }
bool Spectrogram::isHUDDependingOnInput() const { return false; }
-bool Spectrogram::isScopeDependingOnInput() const { return false; }
+bool Spectrogram::isScopeDependingOnInput() const { return true; }
bool Spectrogram::isBackgroundDependingOnInput() const { return false; }
+void Spectrogram::handleMouseDrag(const QPoint movement, const RescaleDirection rescaleDirection, const Qt::KeyboardModifiers rescaleModifiers)
+{
+ if (rescaleDirection == North) {
+ // Nort-South direction: Adjust the dB scale
+
+ if ((rescaleModifiers & Qt::ShiftModifier) == 0) {
+
+ // By default adjust the min dB value
+ m_dBmin += movement.y();
+
+ } else {
+
+ // Adjust max dB value if Shift is pressed.
+ m_dBmax += movement.y();
+
+ }
+
+ // Ensure the dB values lie in [-100, 0] (or rather [MIN_DB_VALUE, 0])
+ // 0 is the upper bound, everything below -70 dB is most likely noise
+ if (m_dBmax > 0) {
+ m_dBmax = 0;
+ }
+ if (m_dBmin < MIN_DB_VALUE) {
+ m_dBmin = MIN_DB_VALUE;
+ }
+ // Ensure there is at least 6 dB between the minimum and the maximum value;
+ // lower values hardly make sense
+ if (m_dBmax - m_dBmin < 6) {
+ if ((rescaleModifiers & Qt::ShiftModifier) == 0) {
+ // min was adjusted; Try to adjust the max value to maintain the
+ // minimum dB difference of 6 dB
+ m_dBmax = m_dBmin + 6;
+ if (m_dBmax > 0) {
+ m_dBmax = 0;
+ m_dBmin = -6;
+ }
+ } else {
+ // max was adjusted, adjust min
+ m_dBmin = m_dBmax - 6;
+ if (m_dBmin < MIN_DB_VALUE) {
+ m_dBmin = MIN_DB_VALUE;
+ m_dBmax = MIN_DB_VALUE+6;
+ }
+ }
+ }
+
+ m_parameterChanged = true;
+ forceUpdateHUD();
+ forceUpdateScope();
+
+ } else if (rescaleDirection == East) {
+ // East-West direction: Adjust the maximum frequency
+ m_freqMax -= 100*movement.x();
+ if (m_freqMax < MIN_FREQ_VALUE) {
+ m_freqMax = MIN_FREQ_VALUE;
+ }
+ if (m_freqMax > MAX_FREQ_VALUE) {
+ m_freqMax = MAX_FREQ_VALUE;
+ }
+ m_customFreq = true;
+
+ m_parameterChanged = true;
+ forceUpdateHUD();
+ forceUpdateScope();
+ }
+}
+
+
+
+void Spectrogram::slotResetMaxFreq()
+{
+ m_customFreq = false;
+ m_parameterChanged = true;
+ forceUpdateHUD();
+ forceUpdateScope();
+}
+
#undef SPECTROGRAM_HISTORY_SIZE
#ifdef DEBUG_SPECTROGRAM
#undef DEBUG_SPECTROGRAM
projects / kdenlive / commitdiff