93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/*
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Strawberry Music Player
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Copyright 2024, Gustavo L Conte <suporte@gu.pro.br>
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Strawberry is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Strawberry is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <QPainter>
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#include <QResizeEvent>
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#include "engine/enginebase.h"
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#include "waverubber.h"
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const char *WaveRubber::kName = QT_TRANSLATE_NOOP("AnalyzerContainer", "WaveRubber");
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WaveRubber::WaveRubber(QWidget *parent)
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: AnalyzerBase(parent, 9) {}
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void WaveRubber::resizeEvent(QResizeEvent *e) {
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Q_UNUSED(e)
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canvas_ = QPixmap(size());
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canvas_.fill(palette().color(QPalette::AlternateBase));
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}
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void WaveRubber::analyze(QPainter &p, const Scope &s, bool new_frame) {
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if (!new_frame || engine_->state() == EngineBase::State::Paused) {
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p.drawPixmap(0, 0, canvas_);
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return;
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}
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// Clear the canvas
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canvas_ = QPixmap(size());
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canvas_.fill(palette().color(QPalette::Window));
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QPainter canvas_painter(&canvas_);
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// Set the pen color to the QT palette highlight color
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canvas_painter.setPen(palette().color(QPalette::Highlight));
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// Get pointer to amplitude data
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const float *amplitude_data = s.data();
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int mid_y = height() / 4;
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int num_samples = s.size();
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float x_scale = static_cast<float>(width()) / num_samples;
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float prev_y = mid_y;
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// Draw the waveform
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for (int i = 0; i < num_samples; ++i) {
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// Normalize amplitude to 0-1 range
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float color_factor = amplitude_data[i] / 2.0f + 0.5f;
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int rgb_value = static_cast<int>(255 - color_factor * 255);
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QColor highlight_color = palette().color(QPalette::Highlight);
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// Blend blue and green with highlight color from QT palette based on amplitude
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QColor blended_color = QColor(rgb_value, highlight_color.green(), highlight_color.blue());
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canvas_painter.setPen(blended_color);
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int x = static_cast<int>(i * x_scale);
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int y = static_cast<int>(mid_y - (s[i] * mid_y));
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canvas_painter.drawLine(x, prev_y + mid_y, x + x_scale, y + mid_y); // Draw
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prev_y = y;
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}
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canvas_painter.end();
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p.drawPixmap(0, 0, canvas_);
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}
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void WaveRubber::transform(Scope &s) {
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// No need transformation for waveform analyzer
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Q_UNUSED(s);
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}
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void WaveRubber::demo(QPainter &p) {
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analyze(p, Scope(fht_->size(), 0), new_frame_);
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}
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