private void GetBaseFilter(IGraphBuilder pGraphBuilder)
{
IEnumFilters pEnum = null;
IBaseFilter pFilter;
int cFetched;
int hr = pGraphBuilder.EnumFilters(out pEnum);
if (DsHlp.SUCCEEDED(hr))
{
while (pEnum.Next(1, out pFilter, out cFetched) == DsHlp.S_OK)
{
Guid clsid;
if (pFilter.GetClassID(out clsid) == DsHlp.S_OK && clsid == RendererID)
{
BaseFilter = pFilter;
break;
}
else
{
Marshal.ReleaseComObject(pFilter);
}
}
Marshal.ReleaseComObject(pEnum);
}
}
public bool DisplayFilterPropPage(IntPtr hParent, string strFilter, bool bDisplay)
{
if (_graphBuilder == null)
{
return(false);
}
IBaseFilter pFilter;
_graphBuilder.FindFilterByName(strFilter, out pFilter);
if (pFilter == null)
{
return(false);
}
var bRet = false;
var pProp = pFilter as ISpecifyPropertyPages;
if (pProp != null)
{
CAUUID caGuid;
var hr = pProp.GetPages(out caGuid);
if (DsHlp.SUCCEEDED(hr) && caGuid.cElems > 0)
{
bRet = true;
if (bDisplay)
{
// Show the page
object pFilterUnk = pFilter;
DsUtils.OleCreatePropertyFrame(
hParent, // Parent window
0, 0, // Reserved
strFilter, // Caption for the dialog box
1, // Number of objects (just the filter)
ref pFilterUnk, // Array of object pointers.
caGuid.cElems, // Number of property pages
caGuid.pElems, // Array of property page CLSIDs
0, // Locale identifier
0, IntPtr.Zero // Reserved
);
}
}
// Clean up
if (caGuid.pElems != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(caGuid.pElems);
}
}
Marshal.ReleaseComObject(pFilter);
return(bRet);
}
public static bool SelectStream(this IAMStreamSelect pStreamSelect, int index)
{
var result = false;
int count;
var hr = pStreamSelect.Count(out count);
if (DsHlp.SUCCEEDED(hr) && count > index)
{
hr = pStreamSelect.Enable(index, AMStreamSelectEnableFlags.Enable);
result = DsHlp.SUCCEEDED(hr);
}
return(result);
}
public void HandleGraphEvent()
{
if (_mediaEventEx == null)
{
return;
}
int evCode, lParam1, lParam2;
while (DsHlp.SUCCEEDED(_mediaEventEx.GetEvent(out evCode, out lParam1, out lParam2, 0)))
{
HandleGraphEvent(evCode, lParam1, lParam2);
_mediaEventEx.FreeEventParams(evCode, lParam1, lParam2);
}
}
public override bool GetCurrentImage(out BITMAPINFOHEADER header, out IntPtr dibFull, out IntPtr dibDataOnly)
{
int hr = _pVMRWindowlessControl9.GetCurrentImage(out dibFull);
if (DsHlp.SUCCEEDED(hr))
{
header = (BITMAPINFOHEADER)Marshal.PtrToStructure(dibFull, typeof(BITMAPINFOHEADER));
dibDataOnly = new IntPtr(dibFull.ToInt64() + Marshal.SizeOf(typeof(BITMAPINFOHEADER)));
return(true);
}
else
{
header = new BITMAPINFOHEADER();
dibDataOnly = IntPtr.Zero;
return(false);
}
}
public static bool IsStreamSelected(this IAMStreamSelect pStreamSelect, int index)
{
var result = false;
int count;
var hr = pStreamSelect.Count(out count);
if (DsHlp.SUCCEEDED(hr) && count > index)
{
var stream = pStreamSelect.GetSelectableStream(index);
if (stream != null)
{
result = stream.Enabled;
}
}
return(result);
}
public override bool GetCurrentImage(out BITMAPINFOHEADER header, out IntPtr dibFull, out IntPtr dibDataOnly)
{
int cbDib;
long timestamp = 0;
header = new BITMAPINFOHEADER();
header.biSize = Marshal.SizeOf(typeof(BITMAPINFOHEADER));
int hr = _pMFVideoDisplayControl.GetCurrentImage(ref header, out dibFull, out cbDib, ref timestamp);
if (DsHlp.SUCCEEDED(hr))
{
dibDataOnly = new IntPtr(dibFull.ToInt64() + Marshal.SizeOf(typeof(BITMAPINFOHEADER)));
return(true);
}
else
{
dibDataOnly = IntPtr.Zero;
return(false);
}
}
public virtual bool ResumeGraph()
{
if (_mediaControl == null)
{
return(false);
}
if (DsHlp.SUCCEEDED(_mediaControl.Run()))
{
GraphState = GraphState.Running;
return(true); // ok, we're running
}
if (UpdateGraphState())
{
GraphState = GraphState.Running;
return(true); // ok, we're running
}
return(false);
}
public static IEnumerable <SelectableStream> GetSelectableStreams(this IAMStreamSelect pStreamSelect)
{
var result = new List <SelectableStream>();
int count;
var hr = pStreamSelect.Count(out count);
if (DsHlp.SUCCEEDED(hr) && count > 0)
{
for (var i = 0; i < count; i++)
{
var stream = pStreamSelect.GetSelectableStream(i);
if (stream != null)
{
result.Add(stream);
}
}
}
return(result);
}
public override bool GetCurrentImage(out BITMAPINFOHEADER header, out IntPtr dibFull, out IntPtr dibDataOnly)
{
int bufferSize = 0;
int hr = BasicVideo2.GetCurrentImage(ref bufferSize, IntPtr.Zero); // get the required buffer size first
if (DsHlp.SUCCEEDED(hr))
{
dibFull = Marshal.AllocCoTaskMem(bufferSize);
hr = BasicVideo2.GetCurrentImage(ref bufferSize, dibFull); // actually get the image
if (DsHlp.SUCCEEDED(hr))
{
header = (BITMAPINFOHEADER)Marshal.PtrToStructure(dibFull, typeof(BITMAPINFOHEADER));
dibDataOnly = new IntPtr(dibFull.ToInt64() + Marshal.SizeOf(typeof(BITMAPINFOHEADER)));
return(true);
}
}
header = new BITMAPINFOHEADER();
dibDataOnly = IntPtr.Zero;
dibFull = IntPtr.Zero;
return(false);
}
public static void InspectStream(this IAMStreamSelect pStreamSelect, int index, Action <AMMediaType, string, bool> inspect)
{
IntPtr ppmt;
AMStreamSelectInfoFlags pdwFlags;
int plcid;
int pdwGroup;
IntPtr ppszName;
IntPtr ppObject;
IntPtr ppUnk;
var hr = pStreamSelect.Info(index, out ppmt, out pdwFlags, out plcid, out pdwGroup, out ppszName, out ppObject, out ppUnk);
if (DsHlp.SUCCEEDED(hr))
{
var mt = ppmt != IntPtr.Zero ? (AMMediaType)Marshal.PtrToStructure(ppmt, typeof(AMMediaType)) : new AMMediaType();
var name = Marshal.PtrToStringAuto(ppszName);
var enabled = (pdwFlags & AMStreamSelectInfoFlags.Enabled) != AMStreamSelectInfoFlags.Disabled ||
(pdwFlags & AMStreamSelectInfoFlags.Exclusive) != AMStreamSelectInfoFlags.Disabled;
inspect(mt, name, enabled);
if (ppmt != IntPtr.Zero)
{
DsUtils.FreeFormatBlock(ppmt);
Marshal.FreeCoTaskMem(ppmt);
}
Marshal.FreeCoTaskMem(ppszName);
if (ppObject != IntPtr.Zero)
{
Marshal.Release(ppObject);
}
if (ppUnk != IntPtr.Zero)
{
Marshal.Release(ppUnk);
}
}
}
/// <summary>
/// Get a read-only list of all renderers that are supported on the current system.
/// </summary>
public ReadOnlyCollection <Renderer> GetPresentVideoRenderers()
{
IList <Renderer> renderers = new List <Renderer>();
if (_pMapper != null)
{
IEnumMoniker pEnum;
IMoniker[] pMonikers = new IMoniker[1];
Guid IID_IBaseFilter = typeof(IBaseFilter).GUID;
Guid[] inTypes = new Guid[] { DirectShow.MediaType.Video, Guid.Empty };
int hr = _pMapper.EnumMatchingFilters(out pEnum,
0, // Reserved
true, // Use exact match?
(int)MERIT.MERIT_DO_NOT_USE,
true, // At least one input pin?
inTypes.Length / 2, // Number of major type/subtype pairs for input
inTypes, // Array of major type/subtype pairs for input
IntPtr.Zero, // Input medium
IntPtr.Zero, // Input pin category
true, // Must be a renderer?
false, // At least one output pin?
0, // Number of major type/subtype pairs for output
null, // Array of major type/subtype pairs for output
IntPtr.Zero, // Output medium
IntPtr.Zero); // Output pin category
if (DsHlp.SUCCEEDED(hr))
{
try
{
object o;
IntPtr cFetched = IntPtr.Zero;
while (pEnum.Next(1, pMonikers, cFetched) == DsHlp.S_OK)
{
o = null;
Guid clsId = Guid.Empty;
try
{
pMonikers[0].BindToObject(null, null,
ref IID_IBaseFilter, out o);
if (o != null && o is IBaseFilter)
{
IBaseFilter pBaseFilter = (IBaseFilter)o;
o = null;
pBaseFilter.GetClassID(out clsId);
Marshal.FinalReleaseComObject(pBaseFilter);
}
}
finally
{
Marshal.ReleaseComObject(pMonikers[0]);
}
IRenderer renderer = RendererBase.GetRenderer(clsId);
if (renderer != null)
{
renderers.Add(renderer.Renderer);
}
}
}
finally
{
Marshal.ReleaseComObject(pEnum);
}
}
}
return(new ReadOnlyCollection <Renderer>(renderers));
}
/// <summary>
/// Get a read-only collection of descriptions of the filters that can be used to render specified media types.
/// </summary>
/// <param name="mediaTypes">Collection of media types.</param>
/// <returns></returns>
public ReadOnlyCollection <FilterDescription> GetMatchingFilters(ICollection <MediaType> mediaTypes)
{
var listFilters = new List <FilterDescription>();
if (mediaTypes == null || !mediaTypes.Any())
{
return(new ReadOnlyCollection <FilterDescription>(listFilters));
}
var listNames = new HashSet <string>();
IEnumMoniker pEnum;
var pMonikers = new IMoniker[1];
Guid IID_IPropertyBag = typeof(IPropertyBag).GUID;
Guid IID_IBaseFilter = typeof(IBaseFilter).GUID;
var arrayInTypes = mediaTypes.SelectMany(t => t.ToIdPair()).ToArray();
var hr = _pMapper.EnumMatchingFilters(out pEnum,
0, // Reserved
true, // Use exact match?
(int)MERIT.MERIT_DO_NOT_USE + 1,
true, // At least one input pin?
mediaTypes.Count, // Number of major type/subtype pairs for input
arrayInTypes, // Array of major type/subtype pairs for input
IntPtr.Zero, // Input medium
IntPtr.Zero, // Input pin category
false, // Must be a renderer?
false, // At least one output pin?
0, // Number of major type/subtype pairs for output
null, // Array of major type/subtype pairs for output
IntPtr.Zero, // Output medium
IntPtr.Zero); // Output pin category
if (DsHlp.SUCCEEDED(hr))
{
object o;
IntPtr cFetched = IntPtr.Zero;
while (pEnum.Next(1, pMonikers, cFetched) == DsHlp.S_OK)
{
o = null;
pMonikers[0].BindToStorage(null, null,
ref IID_IPropertyBag, out o);
if (o != null && o is IPropertyBag)
{
var pPropBag = (IPropertyBag)o;
o = String.Empty;
hr = pPropBag.Read("FriendlyName", ref o, null);
if (DsHlp.SUCCEEDED(hr) && o is String)
{
string name = (string)o;
if (!listNames.Contains(name))
{
o = null;
pMonikers[0].BindToObject(null, null,
ref IID_IBaseFilter, out o);
if (o != null && o is IBaseFilter)
{
var pBaseFilter = (IBaseFilter)o;
o = null;
listNames.Add(name);
Guid clsid;
pBaseFilter.GetClassID(out clsid);
var filterDescription = new FilterDescription(name, clsid);
listFilters.Add(filterDescription);
Marshal.FinalReleaseComObject(pBaseFilter);
}
}
}
Marshal.FinalReleaseComObject(pPropBag);
}
Marshal.ReleaseComObject(pMonikers[0]);
}
Marshal.ReleaseComObject(pEnum);
}
return(new ReadOnlyCollection <FilterDescription>(listFilters));
}
internal static IRenderer SubstituteRenderer(IGraphBuilder pGraphBuilder, IntPtr hMediaWindow, Renderer desiredRenderer)
{
RendererBase existingRenderer = (RendererBase)GetExistingRenderer(pGraphBuilder, hMediaWindow);
// existingRenderer is either VR or VMR windowed (default mode for VMR); VMR9 and EVR are never default renderers
// VR and VMRWindowed need delayed initialization or it's ok to reconnect them before we call GetNativeVideoSize
// if desiredRenderer fails we will return the existing one
IRenderer renderer = existingRenderer;
if (existingRenderer.Renderer != desiredRenderer && desiredRenderer != Renderer.VR) // substitution with VR doesn't work well at least on Vista 64bit
{
RendererBase newRenderer = null;
try
{
newRenderer = (RendererBase)AddRenderer(pGraphBuilder,
desiredRenderer,
delegate(int hrCode, GraphBuilderError error) { },
hMediaWindow,
false);
IPin existingRendererInput, decoderOut;
if (existingRenderer.GetPins(out existingRendererInput, out decoderOut))
{
IPin newRendererInput = newRenderer.GetInputPin();
if (newRendererInput != null)
{
int hr = pGraphBuilder.Connect(decoderOut, newRendererInput);
if (DsHlp.SUCCEEDED(hr))
{
renderer = newRenderer;
newRenderer = null; // so that we don't close it (see finally)
Marshal.ReleaseComObject(existingRendererInput);
existingRendererInput = null;
existingRenderer.RemoveFromGraph();
}
else
{
hr = pGraphBuilder.Connect(decoderOut, existingRendererInput);
}
Marshal.ReleaseComObject(newRendererInput);
}
if (existingRendererInput != null)
{
Marshal.ReleaseComObject(existingRendererInput);
}
Marshal.ReleaseComObject(decoderOut);
}
}
catch // VR throws it if it can't be instantiated; also renderers will throw an expection if they can't be added to the graph
{ // we just ignore it here and return existingRenderer
}
finally
{
if (newRenderer != null)
{
newRenderer.Close();
}
}
}
return(renderer);
}
internal static IRenderer GetExistingRenderer(IGraphBuilder pGraphBuilder, IntPtr hMediaWindow)
{
// this method is to be called to create a wrapper for a renderer that is already in the graph (added by intelligent connect)
// at the momemnt it is assumed that this is a Windowed Renderer (compatability assumption)
RendererBase renderer = null;
try
{
IEnumFilters pEnum = null;
IBaseFilter pFilter;
int cFetched;
int hr = pGraphBuilder.EnumFilters(out pEnum);
if (DsHlp.SUCCEEDED(hr))
{
while (pEnum.Next(1, out pFilter, out cFetched) == DsHlp.S_OK)
{
Guid clsid;
if (pFilter.GetClassID(out clsid) == DsHlp.S_OK)
{
renderer = GetRenderer(clsid);
if (renderer != null)
{
renderer.BaseFilter = pFilter;
break;
}
else
{
Marshal.ReleaseComObject(pFilter);
}
}
else
{
Marshal.ReleaseComObject(pFilter);
}
}
Marshal.ReleaseComObject(pEnum);
}
if (renderer == null)
{
renderer = TryGetUnknownRenderer(pGraphBuilder); // last resort
}
if (renderer == null)
{
throw new FilterGraphBuilderException(GraphBuilderError.VideoRenderer); // we've tried hard enough, there is no point to continue
}
if (!renderer.IsDelayedInitialize)
{
renderer.Initialize(pGraphBuilder, hMediaWindow);
}
renderer.GraphBuilder = pGraphBuilder;
renderer.MediaWindowHandle = hMediaWindow;
renderer._ready = true;
return(renderer);
}
finally
{
if (renderer != null && !renderer._ready)
{
renderer.Close();
}
}
}
private static RendererBase TryGetUnknownRenderer(IGraphBuilder pGraphBuilder)
{
// this is the last resort
RendererBase renderer = null;
IEnumFilters pEnum = null;
IBaseFilter pFilter;
int cFetched;
int hr = pGraphBuilder.EnumFilters(out pEnum);
if (DsHlp.SUCCEEDED(hr))
{
bool bFound = false;
while (!bFound && pEnum.Next(1, out pFilter, out cFetched) == DsHlp.S_OK)
{
IPin pPin = null;
// there should be no output pins
if ((pPin = DsUtils.GetPin(pFilter, PinDirection.Output, false)) != null)
{
// there is an unconnected output pin, this is not a renderer
Marshal.ReleaseComObject(pPin);
}
else if ((pPin = DsUtils.GetPin(pFilter, PinDirection.Output, true)) != null)
{
// there is a connected output pin, this is not a renderer
Marshal.ReleaseComObject(pPin);
}
else
{
// let's check the input pins: there must be at least one connected of type 'video'
int nSkip = 0;
while ((pPin = DsUtils.GetPin(pFilter, PinDirection.Input, true, nSkip)) != null)
{
if (DsUtils.IsMediaTypeSupported(pPin, MediaType.Video) == 0)
{
// there is connected input pin of type 'video'; this looks like a renderer
Marshal.ReleaseComObject(pPin);
renderer = GetRenderer(Renderer.VR); // let's just default it VR
renderer.BaseFilter = pFilter;
bFound = true;
break;
}
else
{
nSkip++;
Marshal.ReleaseComObject(pPin);
}
}
}
if (!bFound)
{
Marshal.ReleaseComObject(pFilter);
}
}
Marshal.ReleaseComObject(pEnum);
}
return(renderer);
}