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
- UserPreferenceChangedEventArgs.cs
- SplitterPanel.cs
- XPathArrayIterator.cs
- EncryptedData.cs
- SpeakProgressEventArgs.cs
- CatalogZoneAutoFormat.cs
- _CommandStream.cs
- Ipv6Element.cs
- LeaseManager.cs
- KeyInstance.cs
- HyperLink.cs
- CompositeFontParser.cs
- FontFaceLayoutInfo.cs
- MobileRedirect.cs
- Simplifier.cs
- ToolStripDropDownClosedEventArgs.cs
- HuffModule.cs
- DrawingContextWalker.cs
- DataGridViewCellToolTipTextNeededEventArgs.cs
- ProgressBarRenderer.cs
- DataGridViewCellToolTipTextNeededEventArgs.cs
- DbModificationClause.cs
- SqlFormatter.cs
- RemotingSurrogateSelector.cs
- GridViewUpdateEventArgs.cs
- GridViewDesigner.cs
- Rect3D.cs
- LineBreak.cs
- ResourceFallbackManager.cs
- DecoderBestFitFallback.cs
- DateTimeFormat.cs
- XmlSchemaObjectCollection.cs
- GiveFeedbackEvent.cs
- XmlImplementation.cs
- DashStyle.cs
- ImmComposition.cs
- XPathBuilder.cs
- _UriTypeConverter.cs
- KeyValueInternalCollection.cs
- ObfuscationAttribute.cs
- TextFormatterHost.cs
- MimeTypePropertyAttribute.cs
- GridView.cs
- StatusBar.cs
- PriorityQueue.cs
- XmlCharCheckingReader.cs
- NestedContainer.cs
- FieldInfo.cs
- Model3D.cs
- ConnectionPoolRegistry.cs
- GridViewCancelEditEventArgs.cs
- AnimatedTypeHelpers.cs
- UnmanagedMarshal.cs
- GeneralTransformCollection.cs
- FastEncoder.cs
- COAUTHINFO.cs
- SelectorItemAutomationPeer.cs
- PackageFilter.cs
- GridViewRowPresenterBase.cs
- odbcmetadatafactory.cs
- AlphabetConverter.cs
- ViewStateException.cs
- DecimalAnimationBase.cs
- FixedSOMLineCollection.cs
- DataObjectCopyingEventArgs.cs
- CodeObjectCreateExpression.cs
- PauseStoryboard.cs
- DataGridPreparingCellForEditEventArgs.cs
- Automation.cs
- EventListenerClientSide.cs
- ListSourceHelper.cs
- Char.cs
- BinaryNode.cs
- ISAPIRuntime.cs
- EventProviderWriter.cs
- SystemInfo.cs
- NodeInfo.cs
- SqlDataSourceSelectingEventArgs.cs
- StringResourceManager.cs
- ProviderException.cs
- ExtenderControl.cs
- OutOfProcStateClientManager.cs
- BufferedOutputStream.cs
- CompensatableSequenceActivity.cs
- CodeTypeParameter.cs
- EntityDataSourceConfigureObjectContext.cs
- AdRotatorDesigner.cs
- Property.cs
- WindowsTitleBar.cs
- TrackingMemoryStream.cs
- PasswordTextNavigator.cs
- rsa.cs
- Component.cs
- XamlDesignerSerializationManager.cs
- AuthenticationConfig.cs
- Label.cs
- SizeChangedEventArgs.cs
- wmiutil.cs
- objectresult_tresulttype.cs
- HWStack.cs