MicrosoftIris/UIX.RenderApi/Microsoft/Iris/Render/VideoStream.cs

// Decompiled with JetBrains decompiler
// Type: Microsoft.Iris.Render.VideoStream
// Assembly: UIX.RenderApi, Version=4.8.0.0, Culture=neutral, PublicKeyToken=ddd0da4d3e678217
// MVID: D47658B8-A8EA-43D6-8837-ECE823BFFFC1
// Assembly location: C:\Program Files\Zune\UIX.RenderApi.dll

using Microsoft.Iris.Render.Common;
using Microsoft.Iris.Render.Graphics;
using Microsoft.Iris.Render.Internal;
using Microsoft.Iris.Render.Protocols.Splash.Rendering;
using System;
using System.Threading;

namespace Microsoft.Iris.Render
{
    internal sealed class VideoStream :
      SharedResource,
      IVideoPoolNotification,
      IVideoStream,
      ISharedRenderObject,
      ISurfaceContentOwner
    {
        private static int s_idxNextUnique = 100;
        private GraphicsDevice m_device;
        private Surface m_surfaceScene;
        private VideoPool m_poolScene;
        private int m_nUniqueID;
        private Size m_sizeTargetPxl;
        private Size m_sizeAspectRatio;

        public VideoStream(RenderSession session, GraphicsDevice device)
          : base(session)
        {
            Debug2.Validate(device != null, typeof(ArgumentNullException), "must pass a valid device");
            this.m_device = device;
            this.Initialize();
        }

        private void Initialize()
        {
            this.m_nUniqueID = Interlocked.Increment(ref s_idxNextUnique);
            this.m_poolScene = new VideoPool(this.m_device, this);
            this.m_surfaceScene = new Surface(m_poolScene, this, Size.Zero);
            this.m_surfaceScene.RegisterUsage(this);
            IEffectTemplate effectTemplate = this.m_session.CreateEffectTemplate(this, "EmptyVideo");
            ColorElement colorElement = new ColorElement("ColorFill", ColorF.FromArgb(byte.MaxValue, 0, 0, 0));
            effectTemplate.Build(colorElement);
            IEffect instance = effectTemplate.CreateInstance(this);
            this.m_poolScene.Effect = (Effect)instance;
            instance.UnregisterUsage(this);
            effectTemplate.UnregisterUsage(this);
            RemoteDynamicSurfaceFactory.SendCreateVideoInstance(this.m_session.RenderingProtocol, this.m_nUniqueID, this.m_session.RenderingPort.MessagingProtocol.Context_ClassHandle, RemoteDevice.CreateFromHandle(this.m_device.RemoteDevice.Port, this.m_device.RemoteDevice.RenderHandle), this.m_surfaceScene.RemoteStub, this.m_poolScene.RemoteVideoStub);
        }

        protected override void Dispose(bool fInDispose)
        {
            if (fInDispose)
            {
                if (this.m_poolScene != null)
                {
                    this.m_surfaceScene.UnregisterUsage(this);
                    this.m_surfaceScene = null;
                    this.m_poolScene.Dispose();
                    this.m_poolScene = null;
                }
                RemoteDynamicSurfaceFactory.SendCloseInstance(this.m_session.RenderingProtocol, this.m_nUniqueID);
            }
            this.m_device = null;
            base.Dispose(fInDispose);
        }

        public void InvalidateClients()
        {
            if (this.InvalidateContentEvent == null)
                return;
            this.InvalidateContentEvent();
        }

        public void NotifySourceChanged(Size sizeTargetPxl, Size sizeAspectRatio)
        {
            bool flag = false;
            if (this.m_sizeTargetPxl != sizeTargetPxl)
            {
                this.m_sizeTargetPxl = sizeTargetPxl;
                flag = true;
            }
            if (this.m_sizeAspectRatio != sizeAspectRatio)
            {
                this.m_sizeAspectRatio = sizeAspectRatio;
                flag = true;
            }
            if (!flag)
                return;
            this.InvalidateClients();
        }

        public void OnSurfaceDisposed(Surface surface)
        {
            if (this.m_surfaceScene != surface)
                return;
            this.m_surfaceScene = null;
        }

        public void OnRestoreContent(Surface surface)
        {
        }

        public int StreamID => this.m_nUniqueID;

        public float ContentOverscan
        {
            get => this.m_poolScene.ContentOverscan;
            set
            {
                Debug2.Validate(value >= 0.0 && value <= 0.5, typeof(ArgumentException), "Valid range for content overscan is [0, .5]");
                if (Math2.WithinEpsilon(this.m_poolScene.ContentOverscan, value))
                    return;
                this.m_poolScene.ContentOverscan = value;
                this.InvalidateClients();
            }
        }

        public int ContentAspectWidth => this.m_sizeAspectRatio.Width;

        public int ContentAspectHeight => this.m_sizeAspectRatio.Height;

        public int ContentHeight => this.m_sizeTargetPxl.Height;

        public int ContentWidth => this.m_sizeTargetPxl.Width;

        public event InvalidateContentHandler InvalidateContentEvent;

        internal Surface Surface => this.m_surfaceScene;

        protected override void OnUsageChange(bool fUsed) => this.InvalidateClients();
    }
}