Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / mediaclock.cs / 1305600 / mediaclock.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: mediaclock.cs // //----------------------------------------------------------------------------- using System; using System.Diagnostics; using System.ComponentModel; using MS.Internal; using MS.Win32; using System.Windows.Media.Animation; using System.Windows.Media; using System.Windows.Media.Composition; using System.Windows.Markup; using System.Security.Permissions; using System.Security; using MS.Internal.PresentationCore; // SecurityHelper using System.Windows.Threading; using System.Runtime.InteropServices; using System.IO; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using UnsafeNativeMethods=MS.Win32.PresentationCore.UnsafeNativeMethods; namespace System.Windows.Media { #region MediaClock ////// Maintains run-time timing state for media (audio/video) objects. /// public class MediaClock : Clock { #region Constructors and Finalizers ////// Creates a MediaClock object. /// /// /// The MediaTimeline to use as a template. /// ////// The returned MediaClock doesn't have any children. /// protected internal MediaClock(MediaTimeline media) : base(media) {} #endregion #region Properties ////// Gets the MediaTimeline object that holds the description controlling the /// behavior of this clock. /// ////// The MediaTimeline object that holds the description controlling the /// behavior of this clock. /// public new MediaTimeline Timeline { get { return (MediaTimeline)base.Timeline; } } #endregion #region Clock Overrides ////// Returns True because Media has the potential to slip. /// ///True protected override bool GetCanSlip() { return true; } ////// Get the actual media time for slip synchronization /// protected override TimeSpan GetCurrentTimeCore() { if (_mediaPlayer != null) { return _mediaPlayer.Position; } else // Otherwise use base implementation { return base.GetCurrentTimeCore(); } } ////// Called when we are stopped. This is the same as pausing and seeking /// to the beginning. /// protected override void Stopped() { // Only perform the operation if we're controlling a player if (_mediaPlayer != null) { _mediaPlayer.SetSpeedRatio(0); _mediaPlayer.SetPosition(TimeSpan.FromTicks(0)); } } ////// Called when our speed changes. A discontinuous time movement may or /// may not have occurred. /// protected override void SpeedChanged() { [....](); } ////// Called when we have a discontinuous time movement, but no change in /// speed /// protected override void DiscontinuousTimeMovement() { [....](); } private void [....]() { // Only perform the operation if we're controlling a player if (_mediaPlayer != null) { double? currentSpeedProperty = this.CurrentGlobalSpeed; double currentSpeedValue = currentSpeedProperty.HasValue ? currentSpeedProperty.Value : 0; TimeSpan? currentTimeProperty = this.CurrentTime; TimeSpan currentTimeValue = currentTimeProperty.HasValue ? currentTimeProperty.Value : TimeSpan.Zero; // If speed was potentially changed to 0, make sure we set media's speed to 0 (e.g. pause) before // setting the position to the target frame. Otherwise, the media's scrubbing mechanism would // not work correctly, because scrubbing requires media to be paused by the time it is seeked. if (currentSpeedValue == 0) { _mediaPlayer.SetSpeedRatio(currentSpeedValue); _mediaPlayer.SetPosition(currentTimeValue); } else { // In the case where speed != 0, we first want to set the position and then the speed. // This is because if we were previously paused, we want to be at the right position // before we begin to play. _mediaPlayer.SetPosition(currentTimeValue); _mediaPlayer.SetSpeedRatio(currentSpeedValue); } } } ////// Returns true if this timeline needs continuous frames. /// This is a hint that we should keep updating our time during the active period. /// ///internal override bool NeedsTicksWhenActive { get { return true; } } /// /// The instance of media that this clock is driving /// internal MediaPlayer Player { get { return _mediaPlayer; } set { MediaPlayer oldPlayer = _mediaPlayer; MediaPlayer newPlayer = value; // avoid inifite loops if (newPlayer != oldPlayer) { _mediaPlayer = newPlayer; // Disassociate the old player if (oldPlayer != null) { oldPlayer.Clock = null; } // Associate the new player if (newPlayer != null) { newPlayer.Clock = this; Uri baseUri = ((IUriContext)Timeline).BaseUri; Uri toPlay = null; // ignore pack URIs for now (see work items 45396 and 41636) if (baseUri != null && baseUri.Scheme != System.IO.Packaging.PackUriHelper.UriSchemePack && !Timeline.Source.IsAbsoluteUri) { toPlay = new Uri(baseUri, Timeline.Source); } else { // // defaults to app domain base if Timeline.Source is // relative // toPlay = Timeline.Source; } // we need to [....] to the current state of the clock newPlayer.SetSource(toPlay); SpeedChanged(); } } } } #endregion #region Private Data members ////// MediaPlayer -- holds all the precious resource references /// private MediaPlayer _mediaPlayer; #endregion } #endregion }; // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: mediaclock.cs // //----------------------------------------------------------------------------- using System; using System.Diagnostics; using System.ComponentModel; using MS.Internal; using MS.Win32; using System.Windows.Media.Animation; using System.Windows.Media; using System.Windows.Media.Composition; using System.Windows.Markup; using System.Security.Permissions; using System.Security; using MS.Internal.PresentationCore; // SecurityHelper using System.Windows.Threading; using System.Runtime.InteropServices; using System.IO; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using UnsafeNativeMethods=MS.Win32.PresentationCore.UnsafeNativeMethods; namespace System.Windows.Media { #region MediaClock ////// Maintains run-time timing state for media (audio/video) objects. /// public class MediaClock : Clock { #region Constructors and Finalizers ////// Creates a MediaClock object. /// /// /// The MediaTimeline to use as a template. /// ////// The returned MediaClock doesn't have any children. /// protected internal MediaClock(MediaTimeline media) : base(media) {} #endregion #region Properties ////// Gets the MediaTimeline object that holds the description controlling the /// behavior of this clock. /// ////// The MediaTimeline object that holds the description controlling the /// behavior of this clock. /// public new MediaTimeline Timeline { get { return (MediaTimeline)base.Timeline; } } #endregion #region Clock Overrides ////// Returns True because Media has the potential to slip. /// ///True protected override bool GetCanSlip() { return true; } ////// Get the actual media time for slip synchronization /// protected override TimeSpan GetCurrentTimeCore() { if (_mediaPlayer != null) { return _mediaPlayer.Position; } else // Otherwise use base implementation { return base.GetCurrentTimeCore(); } } ////// Called when we are stopped. This is the same as pausing and seeking /// to the beginning. /// protected override void Stopped() { // Only perform the operation if we're controlling a player if (_mediaPlayer != null) { _mediaPlayer.SetSpeedRatio(0); _mediaPlayer.SetPosition(TimeSpan.FromTicks(0)); } } ////// Called when our speed changes. A discontinuous time movement may or /// may not have occurred. /// protected override void SpeedChanged() { [....](); } ////// Called when we have a discontinuous time movement, but no change in /// speed /// protected override void DiscontinuousTimeMovement() { [....](); } private void [....]() { // Only perform the operation if we're controlling a player if (_mediaPlayer != null) { double? currentSpeedProperty = this.CurrentGlobalSpeed; double currentSpeedValue = currentSpeedProperty.HasValue ? currentSpeedProperty.Value : 0; TimeSpan? currentTimeProperty = this.CurrentTime; TimeSpan currentTimeValue = currentTimeProperty.HasValue ? currentTimeProperty.Value : TimeSpan.Zero; // If speed was potentially changed to 0, make sure we set media's speed to 0 (e.g. pause) before // setting the position to the target frame. Otherwise, the media's scrubbing mechanism would // not work correctly, because scrubbing requires media to be paused by the time it is seeked. if (currentSpeedValue == 0) { _mediaPlayer.SetSpeedRatio(currentSpeedValue); _mediaPlayer.SetPosition(currentTimeValue); } else { // In the case where speed != 0, we first want to set the position and then the speed. // This is because if we were previously paused, we want to be at the right position // before we begin to play. _mediaPlayer.SetPosition(currentTimeValue); _mediaPlayer.SetSpeedRatio(currentSpeedValue); } } } ////// Returns true if this timeline needs continuous frames. /// This is a hint that we should keep updating our time during the active period. /// ///internal override bool NeedsTicksWhenActive { get { return true; } } /// /// The instance of media that this clock is driving /// internal MediaPlayer Player { get { return _mediaPlayer; } set { MediaPlayer oldPlayer = _mediaPlayer; MediaPlayer newPlayer = value; // avoid inifite loops if (newPlayer != oldPlayer) { _mediaPlayer = newPlayer; // Disassociate the old player if (oldPlayer != null) { oldPlayer.Clock = null; } // Associate the new player if (newPlayer != null) { newPlayer.Clock = this; Uri baseUri = ((IUriContext)Timeline).BaseUri; Uri toPlay = null; // ignore pack URIs for now (see work items 45396 and 41636) if (baseUri != null && baseUri.Scheme != System.IO.Packaging.PackUriHelper.UriSchemePack && !Timeline.Source.IsAbsoluteUri) { toPlay = new Uri(baseUri, Timeline.Source); } else { // // defaults to app domain base if Timeline.Source is // relative // toPlay = Timeline.Source; } // we need to [....] to the current state of the clock newPlayer.SetSource(toPlay); SpeedChanged(); } } } } #endregion #region Private Data members ////// MediaPlayer -- holds all the precious resource references /// private MediaPlayer _mediaPlayer; #endregion } #endregion }; // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ReferenceConverter.cs
- PreservationFileWriter.cs
- GraphicsContainer.cs
- DocumentScope.cs
- RowUpdatedEventArgs.cs
- DataQuery.cs
- Stack.cs
- FilterQuery.cs
- QueryOperationResponseOfT.cs
- HTMLTagNameToTypeMapper.cs
- DataComponentNameHandler.cs
- ServiceAppDomainAssociationProvider.cs
- XmlNodeChangedEventArgs.cs
- EndEvent.cs
- ExpandedWrapper.cs
- BuildProvidersCompiler.cs
- CompilationAssemblyInstallComponent.cs
- XslAstAnalyzer.cs
- ListViewItemEventArgs.cs
- RegisteredHiddenField.cs
- DecoderReplacementFallback.cs
- FieldAccessException.cs
- UnitControl.cs
- WebScriptMetadataMessage.cs
- TextEndOfSegment.cs
- EntityRecordInfo.cs
- PathFigureCollection.cs
- BinaryConverter.cs
- DBConnection.cs
- View.cs
- WebPartHeaderCloseVerb.cs
- ListViewItemSelectionChangedEvent.cs
- StagingAreaInputItem.cs
- SolidColorBrush.cs
- CodeRegionDirective.cs
- OutputCacheSettingsSection.cs
- SourceFileInfo.cs
- linebase.cs
- LayoutSettings.cs
- AvTrace.cs
- WebPartEditorOkVerb.cs
- Win32PrintDialog.cs
- HtmlToClrEventProxy.cs
- MobileListItemCollection.cs
- XPathNode.cs
- StylusShape.cs
- DocumentOrderQuery.cs
- DataGridTablesFactory.cs
- JumpList.cs
- ColumnBinding.cs
- OdbcError.cs
- EntityKeyElement.cs
- InternalResources.cs
- BooleanConverter.cs
- PeerConnector.cs
- WsdlBuildProvider.cs
- configsystem.cs
- BamlLocalizabilityResolver.cs
- Interfaces.cs
- TransformGroup.cs
- CompositeFontInfo.cs
- DirectoryGroupQuery.cs
- WebCategoryAttribute.cs
- DragEvent.cs
- DeclaredTypeElementCollection.cs
- XmlArrayAttribute.cs
- ReadWriteSpinLock.cs
- InputLanguageEventArgs.cs
- TreeViewItemAutomationPeer.cs
- StoreContentChangedEventArgs.cs
- MissingManifestResourceException.cs
- AnnotationAdorner.cs
- NavigatorOutput.cs
- ReachFixedDocumentSerializerAsync.cs
- DataTableReaderListener.cs
- HtmlString.cs
- ServiceNameElement.cs
- FrameworkTemplate.cs
- Thread.cs
- ChannelPoolSettings.cs
- UIElementIsland.cs
- StoragePropertyMapping.cs
- LinearKeyFrames.cs
- CopyOnWriteList.cs
- ConnectionProviderAttribute.cs
- WindowInteropHelper.cs
- ResourceDictionary.cs
- SemaphoreSecurity.cs
- ComponentDispatcherThread.cs
- ModelTreeEnumerator.cs
- PixelFormats.cs
- FormsAuthenticationTicket.cs
- Avt.cs
- EditorBrowsableAttribute.cs
- Model3DGroup.cs
- SID.cs
- CodeIterationStatement.cs
- WebHttpElement.cs
- DataServiceQueryException.cs
- TargetConverter.cs