64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#include "audiomonitor.h"
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#include "project/sequence.h"
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#include "playback/audio.h"
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#include "panels/panels.h"
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#include "panels/timeline.h"
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#include <QPainter>
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#include <QLinearGradient>
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#include <QtMath>
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#include <QDebug>
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#define AUDIO_MONITOR_GAP 3
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extern "C" {
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#include "libavformat/avformat.h"
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}
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AudioMonitor::AudioMonitor(QWidget *parent) : QWidget(parent) {
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}
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void AudioMonitor::reset() {
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sample_cache_offset = -1;
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sample_cache.clear();
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}
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void AudioMonitor::resizeEvent(QResizeEvent *e) {
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gradient = QLinearGradient(QPoint(0, rect().top()), QPoint(0, rect().bottom()));
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gradient.setColorAt(0, Qt::red);
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gradient.setColorAt(0.25, Qt::yellow);
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gradient.setColorAt(1, Qt::green);
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QWidget::resizeEvent(e);
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}
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void AudioMonitor::paintEvent(QPaintEvent *) {
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if (sequence != NULL) {
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QPainter p(this);
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int channel_x = AUDIO_MONITOR_GAP;
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int channel_count = av_get_channel_layout_nb_channels(sequence->audio_layout);
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int channel_width = (width()/channel_count) - AUDIO_MONITOR_GAP;
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// for (int i=0;i<channel_count;i++) {
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for (int i=0;i<1;i++) {
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QRect r(channel_x, 0, channel_width, height());
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p.fillRect(r, gradient);
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if (sample_cache_offset != -1) {
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long playhead_offset = panel_timeline->playhead - sample_cache_offset;
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if (playhead_offset >= 0 && playhead_offset < sample_cache.size()) {
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//int channel_offset = i*2;
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double multiplier = 1 - qAbs((double) sample_cache.at(playhead_offset) / 32768.0); // 16-bit int divided to float
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r.setHeight(r.height()*multiplier);
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sample_cache_offset++;
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sample_cache.removeFirst();
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} else {
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reset();
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}
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}
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p.fillRect(r, QColor(0, 0, 0, 160));
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channel_x += channel_width + AUDIO_MONITOR_GAP;
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}
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}
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}
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