Initial Commit

Library/PackageCache/com.unity.timeline@1.5.4/Runtime/Audio/AudioTrack.cs

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