108 lines
2.7 KiB
C++
108 lines
2.7 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2021 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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#include "timeline/timelinecommon.h"
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namespace olive {
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#define super SeekableWidget
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AudioWaveformView::AudioWaveformView(QWidget *parent) :
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super(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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AudioVisualWaveform GenerateWaveform(QIODevice* device, AudioParams params, TimeRange range)
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{
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device->open(QFile::ReadOnly);
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device->seek(params.time_to_bytes(range.in()));
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SampleBufferPtr samples = SampleBuffer::CreateFromPackedData(params, device->read(params.time_to_bytes(range.length())));
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AudioVisualWaveform waveform;
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waveform.set_channel_count(params.channel_count());
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waveform.OverwriteSamples(samples, params.sample_rate());
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device->close();
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delete device;
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return waveform;
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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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pool_.clear();
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pool_.waitForDone();
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disconnect(playback_, &AudioPlaybackCache::Validated, this, static_cast<void(AudioWaveformView::*)()>(&AudioWaveformView::update));
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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, static_cast<void(AudioWaveformView::*)()>(&AudioWaveformView::update));
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SetTimebase(playback_->GetParameters().sample_rate_as_time_base());
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}
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}
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void AudioWaveformView::paintEvent(QPaintEvent *event)
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{
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super::paintEvent(event);
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if (!playback_) {
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return;
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}
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const AudioParams& params = playback_->GetParameters();
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if (!params.is_valid()) {
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return;
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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 waveform
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p.setPen(QColor(64, 255, 160)); // FIXME: Hardcoded color
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AudioVisualWaveform::DrawWaveform(&p, rect(), GetScale(), playback_->visual(), SceneToTime(GetScroll()));
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// Draw playhead
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p.setPen(PLAYHEAD_COLOR);
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int playhead_x = TimeToScreen(GetTime());
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p.drawLine(playhead_x, 0, playhead_x, height());
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}
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}
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