131 lines
4.5 KiB
C#
131 lines
4.5 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine.Audio;
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using UnityEngine.Playables;
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namespace UnityEngine.Timeline
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{
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/// <summary>
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/// A Timeline track that can play AudioClips.
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/// </summary>
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[Serializable]
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[TrackClipType(typeof(AudioPlayableAsset), false)]
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[TrackBindingType(typeof(AudioSource))]
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[ExcludeFromPreset]
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[TimelineHelpURL(typeof(AudioTrack))]
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public class AudioTrack : TrackAsset
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{
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[SerializeField]
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AudioMixerProperties m_TrackProperties = new AudioMixerProperties();
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#if UNITY_EDITOR
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Playable m_LiveMixerPlayable = Playable.Null;
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#endif
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/// <summary>
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/// Create an TimelineClip for playing an AudioClip on this track.
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/// </summary>
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/// <param name="clip">The audio clip to play</param>
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/// <returns>A TimelineClip with an AudioPlayableAsset asset.</returns>
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public TimelineClip CreateClip(AudioClip clip)
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{
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if (clip == null)
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return null;
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var newClip = CreateDefaultClip();
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var audioAsset = newClip.asset as AudioPlayableAsset;
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if (audioAsset != null)
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audioAsset.clip = clip;
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newClip.duration = clip.length;
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newClip.displayName = clip.name;
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return newClip;
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}
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internal override Playable CompileClips(PlayableGraph graph, GameObject go, IList<TimelineClip> timelineClips, IntervalTree<RuntimeElement> tree)
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{
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var clipBlender = AudioMixerPlayable.Create(graph, timelineClips.Count);
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#if UNITY_EDITOR
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clipBlender.GetHandle().SetScriptInstance(m_TrackProperties.Clone());
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m_LiveMixerPlayable = clipBlender;
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#else
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if (hasCurves)
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clipBlender.GetHandle().SetScriptInstance(m_TrackProperties.Clone());
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#endif
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for (int i = 0; i < timelineClips.Count; i++)
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{
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var c = timelineClips[i];
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var asset = c.asset as PlayableAsset;
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if (asset == null)
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continue;
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var buffer = 0.1f;
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var audioAsset = c.asset as AudioPlayableAsset;
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if (audioAsset != null)
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buffer = audioAsset.bufferingTime;
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var source = asset.CreatePlayable(graph, go);
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if (!source.IsValid())
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continue;
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if (source.IsPlayableOfType<AudioClipPlayable>())
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{
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// Enforce initial values on all clips
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var audioClipPlayable = (AudioClipPlayable)source;
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var audioClipProperties = audioClipPlayable.GetHandle().GetObject<AudioClipProperties>();
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audioClipPlayable.SetVolume(Mathf.Clamp01(m_TrackProperties.volume * audioClipProperties.volume));
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audioClipPlayable.SetStereoPan(Mathf.Clamp(m_TrackProperties.stereoPan, -1.0f, 1.0f));
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audioClipPlayable.SetSpatialBlend(Mathf.Clamp01(m_TrackProperties.spatialBlend));
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}
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tree.Add(new ScheduleRuntimeClip(c, source, clipBlender, buffer));
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graph.Connect(source, 0, clipBlender, i);
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source.SetSpeed(c.timeScale);
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source.SetDuration(c.extrapolatedDuration);
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clipBlender.SetInputWeight(source, 1.0f);
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}
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ConfigureTrackAnimation(tree, go, clipBlender);
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return clipBlender;
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}
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/// <inheritdoc/>
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public override IEnumerable<PlayableBinding> outputs
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{
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get { yield return AudioPlayableBinding.Create(name, this); }
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}
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#if UNITY_EDITOR
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internal void LiveLink()
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{
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if (!m_LiveMixerPlayable.IsValid())
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return;
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var audioMixerProperties = m_LiveMixerPlayable.GetHandle().GetObject<AudioMixerProperties>();
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if (audioMixerProperties == null)
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return;
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audioMixerProperties.volume = m_TrackProperties.volume;
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audioMixerProperties.stereoPan = m_TrackProperties.stereoPan;
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audioMixerProperties.spatialBlend = m_TrackProperties.spatialBlend;
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}
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#endif
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void OnValidate()
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{
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m_TrackProperties.volume = Mathf.Clamp01(m_TrackProperties.volume);
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m_TrackProperties.stereoPan = Mathf.Clamp(m_TrackProperties.stereoPan, -1.0f, 1.0f);
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m_TrackProperties.spatialBlend = Mathf.Clamp01(m_TrackProperties.spatialBlend);
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}
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}
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}
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