// To avoid blocking the UI thread, SoundPlayerAction performs an asynchronous
// download of the WebResponse and later, the response Stream. However,
// PackWebRequest does not support the asynchonous Begin/EndGetResponse pattern.
// To work around this, we use our own asynchronous worker pool thread,
// and then use the regular synchronous WebRequest.GetResponse() method.
// Once we obtain the WebResponse, we will use SoundPlayer's async API
// to download the content of the stream.
private void OnSourceChangedHelper(Uri newValue)
{
if (newValue == null || newValue.IsAbsoluteUri)
{
m_lastRequestedAbsoluteUri = newValue;
}
else
{
// When we are given a relative Uri path, expand to an absolute Uri by resolving
// it against the Application's base Uri. This would typically return a Pack Uri.
m_lastRequestedAbsoluteUri =
BaseUriHelper.GetResolvedUri(BaseUriHelper.BaseUri, newValue);
}
// Invalidate items that depend on the Source uri
m_player = null;
m_playRequested = false; // Suppress earlier requests to Play the sound
if (m_streamLoadInProgress)
{
// There is already a worker thread downloading the previous URI stream,
// or the SoundPlayer is copying the stream into its buffer. Make a note
// that the URI has been changed and we will have to reload everything.
m_uriChangedWhileLoadingStream = true;
}
else
{
BeginLoadStream();
}
}
/// <summary>
/// This method is invoked whenever the source property changes.
/// </summary>
private void UriSourcePropertyChangedHook(DependencyPropertyChangedEventArgs e)
{
// Decided against comparing the URI because the user might want to change the shader on the filesystem
// and reload it.
// We do not support async loading of shaders here. If that is desired the user needs to use the SetStreamSource
// API.
Uri newUri = (Uri)e.NewValue;
Stream stream = null;
try {
if (newUri != null)
{
if (!newUri.IsAbsoluteUri)
{
newUri = BaseUriHelper.GetResolvedUri(BaseUriHelper.BaseUri, newUri);
}
Debug.Assert(newUri.IsAbsoluteUri);
// Now the URI is an absolute URI.
//
// Only allow file and pack URIs.
if (!newUri.IsFile &&
!PackUriHelper.IsPackUri(newUri))
{
throw new ArgumentException(SR.Get(SRID.Effect_SourceUriMustBeFileOrPack));
}
stream = WpfWebRequestHelper.CreateRequestAndGetResponseStream(newUri);
}
LoadPixelShaderFromStreamIntoMemory(stream);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
}
// Token: 0x06005650 RID: 22096 RVA: 0x0017E5E8 File Offset: 0x0017C7E8
private void OnSourceChangedHelper(Uri newValue)
{
if (newValue == null || newValue.IsAbsoluteUri)
{
this.m_lastRequestedAbsoluteUri = newValue;
}
else
{
this.m_lastRequestedAbsoluteUri = BaseUriHelper.GetResolvedUri(BaseUriHelper.BaseUri, newValue);
}
this.m_player = null;
this.m_playRequested = false;
if (this.m_streamLoadInProgress)
{
this.m_uriChangedWhileLoadingStream = true;
return;
}
this.BeginLoadStream();
}
internal static CodeAccessPermission CreateMediaAccessPermission(string uri)
{
CodeAccessPermission result = null;
if (uri != null)
{
if (string.Compare("image", uri, true, TypeConverterHelper.InvariantEnglishUS) == 0)
{
result = new MediaPermission(MediaPermissionAudio.NoAudio, MediaPermissionVideo.NoVideo, MediaPermissionImage.AllImage);
}
else if (string.Compare(BaseUriHelper.GetResolvedUri(BaseUriHelper.BaseUri, new Uri(uri, UriKind.RelativeOrAbsolute)).Scheme, PackUriHelper.UriSchemePack, true, TypeConverterHelper.InvariantEnglishUS) != 0 && !CallerHasWebPermission(new Uri(uri, UriKind.RelativeOrAbsolute)))
{
result = new MediaPermission(MediaPermissionAudio.NoAudio, MediaPermissionVideo.NoVideo, MediaPermissionImage.AllImage);
}
}
else
{
result = new MediaPermission(MediaPermissionAudio.NoAudio, MediaPermissionVideo.NoVideo, MediaPermissionImage.AllImage);
}
return(result);
}