public int AddClip(string path, out ClipEntry pClip)
{
int it = m_Clips.Count;
pClip = new ClipEntry();
m_Clips.Add(pClip);
int hr = pClip.Create(m_pController, path);
// if we expect both audio and video, then all clips
// must have both audio and video.
// If the first clip is video only, then switch
// to video-only automatically
if ((hr == VFW_E_UNSUPPORTED_AUDIO) && (m_Clips.Count == 1))
{
// new controller, different options (only one video stream)
if (m_pController != null)
{
Marshal.ReleaseComObject(m_pController);
m_pController = null;
}
m_pController = new GMFBridgeController() as IGMFBridgeController;
m_pController.SetNotify(m_hwndApp, m_msgSegment);
m_pController.AddStream(true, eFormatType.Uncompressed, false);
m_pController.SetBufferMinimum(200);
// try again
hr = pClip.Create(m_pController, path);
}
if (hr >= 0)
{
pClip.SetStartPosition(m_tDuration);
m_tDuration += pClip.Duration();
// if this is the first clip, create the render graph
if (m_Clips.Count == 1)
{
m_pRenderGraph = new FilterGraph() as IGraphBuilder;
hr = m_pController.CreateRenderGraph(pClip.SinkFilter(), m_pRenderGraph, out m_pRenderGraphSourceFilter);
if (hr >= 0 && m_hwndApp != IntPtr.Zero)
{
IMediaEventEx pME = m_pRenderGraph as IMediaEventEx;
if (pME != null)
{
pME.SetNotifyWindow(m_hwndApp, m_msgEvent, IntPtr.Zero);
}
}
}
}
else
{
pClip.Dispose();
m_Clips.RemoveAt(it);
}
return(hr);
}
public int AddClip(string path, out ClipEntry pClip)
{
int it = m_Clips.Count;
pClip = new ClipEntry();
m_Clips.Add(pClip);
int hr = pClip.Create(m_pController, path);
// if we expect both audio and video, then all clips
// must have both audio and video.
// If the first clip is video only, then switch
// to video-only automatically
if ((hr == VFW_E_UNSUPPORTED_AUDIO) && (m_Clips.Count == 1))
{
// new controller, different options (only one video stream)
if (m_pController != null)
{
Marshal.ReleaseComObject(m_pController);
m_pController = null;
}
m_pController = new GMFBridgeController() as IGMFBridgeController;
m_pController.SetNotify(m_hwndApp, m_msgSegment);
m_pController.AddStream(true, eFormatType.Uncompressed, false);
m_pController.SetBufferMinimum(200);
// try again
hr = pClip.Create(m_pController, path);
}
if (hr >= 0)
{
pClip.SetStartPosition(m_tDuration);
m_tDuration += pClip.Duration();
// if this is the first clip, create the render graph
if (m_Clips.Count == 1)
{
m_pRenderGraph = new FilterGraph() as IGraphBuilder;
hr = m_pController.CreateRenderGraph(pClip.SinkFilter(), m_pRenderGraph, out m_pRenderGraphSourceFilter);
if (hr >= 0 && m_hwndApp != IntPtr.Zero)
{
IMediaEventEx pME = m_pRenderGraph as IMediaEventEx;
if (pME != null)
{
pME.SetNotifyWindow(m_hwndApp, m_msgEvent, IntPtr.Zero);
}
}
}
}
else
{
pClip.Dispose();
m_Clips.RemoveAt(it);
}
return hr;
}
public void OnEndOfSegment()
{
if (m_itCurrent == m_Clips.Count)
{
// ? already at the end
return;
}
int itOld = m_itCurrent;
// locate next graph
m_itCurrent++;
if (m_pPlayNext >= 0)
{
// jump to specified clip
m_itCurrent = m_pPlayNext;
m_pPlayNext = -1;
}
if (m_itCurrent == m_Clips.Count)
{
if (!m_bLoop)
{
// no more clips, so allow EOS to propagate through
// render graph. We will receive EC_COMPLETE eventually.
m_pController.NoMoreSegments();
// disconnect graphs -- but we cannot do that until NoMoreSegments has
// sent the EndOfStream through the bridge
m_pController.BridgeGraphs(null, null);
return;
}
// disconnect graphs before seeking the source graph
m_pController.BridgeGraphs(null, null);
m_itCurrent = 0;
m_tStartPosition = 0;
}
ClipEntry ce = (ClipEntry)m_Clips[m_itCurrent];
// has this graph been rewound?
ce.Prime();
// now we are about to connect it, so as soon as data is delivered out of the graph it
// is no longer primed for re-use (it will need a new seek before using again)
ce.InUse();
// reconnect
m_pController.BridgeGraphs(ce.SinkFilter(), m_pRenderGraphSourceFilter);
if (m_bLoop && (m_itCurrent != itOld))
{
ce = (ClipEntry)m_Clips[itOld];
// need to rewind clip for next time round
// unless we are reusing it immediately (ie looping single clip)
// it's better to do this when not in use
ce.Prime(0);
}
}