public WaveformPreview GetOrCreateWaveformPreview(TimelineClip clip, AudioClip audioClip, Rect rect, double startTime, double endTime)
{
if (QualitySettings.activeColorSpace != m_ColorSpace)
{
m_ColorSpace = QualitySettings.activeColorSpace;
m_PersistentPreviews.Clear();
}
bool previewExists = m_PersistentPreviews.TryGetValue(clip, out WaveformPreview preview);
bool audioClipHasChanged = preview != null && audioClip != preview.presentedObject;
if (!previewExists || audioClipHasChanged)
{
if (AssetDatabase.Contains(audioClip))
{
preview = CreateWaveformPreview(audioClip, rect);
}
m_PersistentPreviews[clip] = preview;
}
if (preview == null)
{
return(null);
}
preview.looping = clip.SupportsLooping();
preview.SetTimeInfo(startTime, endTime - startTime);
preview.OptimizeForSize(rect.size);
return(preview);
}
/// <inheritdoc/>
public override void DrawBackground(TimelineClip clip, ClipBackgroundRegion region)
{
if (!TimelineWindow.instance.state.showAudioWaveform)
{
return;
}
var rect = region.position;
if (rect.width <= 0)
{
return;
}
var audioClip = clip.asset as AudioClip;
if (audioClip == null)
{
var audioPlayableAsset = clip.asset as AudioPlayableAsset;
if (audioPlayableAsset != null)
{
audioClip = audioPlayableAsset.clip;
}
}
if (audioClip == null)
{
return;
}
var quantizedRect = new Rect(Mathf.Ceil(rect.x), Mathf.Ceil(rect.y), Mathf.Ceil(rect.width), Mathf.Ceil(rect.height));
WaveformPreview preview;
if (QualitySettings.activeColorSpace != m_ColorSpace)
{
m_ColorSpace = QualitySettings.activeColorSpace;
m_PersistentPreviews.Clear();
}
if (!m_PersistentPreviews.TryGetValue(clip, out preview) || audioClip != preview.presentedObject)
{
preview = m_PersistentPreviews[clip] = WaveformPreviewFactory.Create((int)quantizedRect.width, audioClip);
Color waveColour = GammaCorrect(DirectorStyles.Instance.customSkin.colorAudioWaveform);
Color transparent = waveColour;
transparent.a = 0;
preview.backgroundColor = transparent;
preview.waveColor = waveColour;
preview.SetChannelMode(WaveformPreview.ChannelMode.MonoSum);
preview.updated += () => TimelineEditor.Refresh(RefreshReason.WindowNeedsRedraw);
}
preview.looping = clip.SupportsLooping();
preview.SetTimeInfo(region.startTime, region.endTime - region.startTime);
preview.OptimizeForSize(quantizedRect.size);
if (Event.current.type == EventType.Repaint)
{
preview.ApplyModifications();
preview.Render(quantizedRect);
}
}