96 lines
2.9 KiB
C++
96 lines
2.9 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_PEAK_HEIGHT 15
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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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reset();
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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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update();
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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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/*if (peaks.size() != channel_count) {
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peaks.resize(channel_count);
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peaks.fill(false);
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}*/
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int channel_width = (width()/channel_count) - AUDIO_MONITOR_GAP;
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long playhead_offset = -1;
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int i;
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for (i=0;i<channel_count;i++) {
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QRect r(channel_x, AUDIO_MONITOR_PEAK_HEIGHT + AUDIO_MONITOR_GAP, channel_width, height());
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p.fillRect(r, gradient);
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if (sample_cache_offset != -1 && sample_cache.size() > 0) {
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playhead_offset = (panel_timeline->playhead - sample_cache_offset) * channel_count;
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if (playhead_offset >= 0 && playhead_offset < sample_cache.size()) {
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double multiplier = 1 - qAbs((double) sample_cache.at(playhead_offset+i) / 32768.0); // 16-bit int divided to float
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/*if (multiplier == (double) 0) {
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peaks[i] = true;
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}*/
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r.setHeight(r.height()*multiplier);
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} else {
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reset();
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}
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}
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/*QRect peak_rect(channel_x, 0, channel_width, AUDIO_MONITOR_PEAK_HEIGHT);
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if (peaks.at(i)) {
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p.fillRect(peak_rect, QColor(255, 0, 0));
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} else {
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p.fillRect(peak_rect, QColor(64, 0, 0));
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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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if (playhead_offset > -1) {
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// clean up used samples
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bool error = false;
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while (sample_cache_offset < panel_timeline->playhead && !error) {
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sample_cache_offset++;
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for (i=0;i<channel_count;i++) {
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if (sample_cache.isEmpty()) {
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reset();
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error = true;
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break;
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} else {
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sample_cache.removeFirst();
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}
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}
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}
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}
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}
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}
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