itsmattkc
c2e47a296c
Features a lot of timeline-related cache optimizations as well as general optimizations and improvements in timeline behavior. Should improve usability significantly.
151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program 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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This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "audiowaveformview.h"
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#include <QFile>
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#include <QPainter>
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#include <QtMath>
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#include "common/clamp.h"
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#include "config/config.h"
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OLIVE_NAMESPACE_ENTER
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AudioWaveformView::AudioWaveformView(QWidget *parent) :
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SeekableWidget(parent),
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playback_(nullptr)
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{
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setAutoFillBackground(true);
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setBackgroundRole(QPalette::Base);
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}
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void AudioWaveformView::SetViewer(AudioPlaybackCache *playback)
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{
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if (playback_) {
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disconnect(playback_, &AudioPlaybackCache::Validated, this, &AudioWaveformView::ForceUpdate);
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disconnect(playback_, &AudioPlaybackCache::ParametersChanged, this, &AudioWaveformView::BackendParamsChanged);
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SetTimebase(0);
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}
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playback_ = playback;
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if (playback_) {
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connect(playback_, &AudioPlaybackCache::Validated, this, &AudioWaveformView::ForceUpdate);
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connect(playback_, &AudioPlaybackCache::ParametersChanged, this, &AudioWaveformView::BackendParamsChanged);
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SetTimebase(playback_->GetParameters().time_base());
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}
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ForceUpdate();
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}
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void AudioWaveformView::paintEvent(QPaintEvent *event)
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{
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QWidget::paintEvent(event);
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const AudioRenderingParams& params = playback_->GetParameters();
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if (!playback_
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|| playback_->GetCacheFilename().isEmpty()
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|| !params.is_valid()) {
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return;
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}
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if (cached_size_ != size()
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|| cached_scale_ != GetScale()
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|| cached_scroll_ != GetScroll()) {
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cached_waveform_ = QPixmap(size());
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cached_waveform_.fill(Qt::transparent);
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QFile fs(playback_->GetCacheFilename());
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if (fs.open(QFile::ReadOnly)) {
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QPainter wave_painter(&cached_waveform_);
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// FIXME: Hardcoded color
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wave_painter.setPen(QColor(64, 255, 160));
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int drew = 0;
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fs.seek(params.samples_to_bytes(ScreenToUnitRounded(0)));
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for (int x=0; x<width() && !fs.atEnd(); x++) {
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int samples_len = ScreenToUnitRounded(x+1) - ScreenToUnitRounded(x);
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int max_read_size = params.samples_to_bytes(samples_len);
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QByteArray read_buffer = fs.read(max_read_size);
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// Detect whether we've reached EOF and recalculate sample count if so
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if (read_buffer.size() < max_read_size) {
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samples_len = params.bytes_to_samples(read_buffer.size());
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}
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QVector<AudioVisualWaveform::SamplePerChannel> samples = AudioVisualWaveform::SumSamples(reinterpret_cast<const float*>(read_buffer.constData()),
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samples_len,
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params.channel_count());
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for (int i=0;i<params.channel_count();i++) {
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AudioVisualWaveform::DrawSample(&wave_painter, samples, x, 0, height());
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drew++;
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}
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}
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cached_size_ = size();
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cached_scale_ = GetScale();
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cached_scroll_ = GetScroll();
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fs.close();
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}
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}
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QPainter p(this);
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// Draw in/out points
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DrawTimelinePoints(&p);
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// Draw cached waveform pixmap
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p.drawPixmap(0, 0, cached_waveform_);
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// Draw playhead
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p.setPen(GetPlayheadColor());
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int playhead_x = UnitToScreen(GetTime());
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p.drawLine(playhead_x, 0, playhead_x, height());
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}
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void AudioWaveformView::BackendParamsChanged()
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{
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SetTimebase(playback_->GetParameters().time_base());
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}
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void AudioWaveformView::ForceUpdate()
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{
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cached_size_ = QSize();
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update();
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}
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OLIVE_NAMESPACE_EXIT
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