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Implement movie surface stop-time queries

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gamer147
2026-07-21 14:43:24 -04:00
parent b0971f2047
commit fdcfbd9fa6
15 changed files with 330 additions and 60 deletions
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25
godot/DirectShowMovieDecoder.cs
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@@ -35,6 +35,9 @@ internal sealed class DirectShowMovieDecoder : IDisposable, ISampleGrabberCB
private IMediaControl? _control;
public bool IsCompleted => _completed;
/// <summary>The graph's IMediaPosition stop time converted exactly as native op 0x23f does:
/// seconds * 1000, truncated toward zero. Null means DirectShow supplied no usable value.</summary>
public long? StopTimeMs { get; private set; }
public DirectShowMovieDecoder(MoviePayload movie)
{
@@ -112,6 +115,13 @@ internal sealed class DirectShowMovieDecoder : IDisposable, ISampleGrabberCB
int stateHr = _control.GetState(5000, out int graphState);
if (stateHr < 0) Check(stateHr, "wait for running movie graph");
if (graphState != 2) throw new InvalidOperationException($"movie graph entered unexpected state {graphState}");
var mediaPosition = (IMediaPosition)_graphObject;
int stopHr = mediaPosition.get_StopTime(out double stopTimeSeconds);
double stopTimeMilliseconds = stopTimeSeconds * 1000.0;
if (stopHr >= 0 && double.IsFinite(stopTimeMilliseconds)
&& stopTimeMilliseconds >= int.MinValue
&& stopTimeMilliseconds <= int.MaxValue)
StopTimeMs = (long)System.Math.Truncate(stopTimeMilliseconds);
_ready.Set();
var mediaEvent = (IMediaEvent)_graphObject;
while (!_stopping)
@@ -265,6 +275,21 @@ internal sealed class DirectShowMovieDecoder : IDisposable, ISampleGrabberCB
[ComImport, Guid("56A868B1-0AD4-11CE-B03A-0020AF0BA770"), InterfaceType(ComInterfaceType.InterfaceIsDual)]
private interface IMediaControl
{ [PreserveSig] int Run(); [PreserveSig] int Pause(); [PreserveSig] int Stop(); [PreserveSig] int GetState(int timeout, out int state); }
[ComImport, Guid("56A868B2-0AD4-11CE-B03A-0020AF0BA770"), InterfaceType(ComInterfaceType.InterfaceIsDual)]
private interface IMediaPosition
{
[PreserveSig] int get_Duration(out double seconds);
[PreserveSig] int put_CurrentPosition(double seconds);
[PreserveSig] int get_CurrentPosition(out double seconds);
[PreserveSig] int get_StopTime(out double seconds);
[PreserveSig] int put_StopTime(double seconds);
[PreserveSig] int get_PrerollTime(out double seconds);
[PreserveSig] int put_PrerollTime(double seconds);
[PreserveSig] int put_Rate(double rate);
[PreserveSig] int get_Rate(out double rate);
[PreserveSig] int CanSeekForward(out int canSeekForward);
[PreserveSig] int CanSeekBackward(out int canSeekBackward);
}
[ComImport, Guid("56A868B6-0AD4-11CE-B03A-0020AF0BA770"), InterfaceType(ComInterfaceType.InterfaceIsDual)]
private interface IMediaEvent
{