VideoDecklink: accept mode index, test dvp.dll presence, enable audio just in case.

mode index instead of mode name can be used when opening the card:
VideoDecklink("1/2vuy",0)
The list of video mode is specific to each board and this method is
therefore not generic. Only use it for debugging purposes.

VideoDecklink will not throw if dvp.dll is not found when opening a Decklink
card on Windows with a nVideo Quadro GPU; instead it will fallback on
standard OpenGL transfer. It is preferable to use dvp.dll when possible as it
provides faster image transfer to Quadro GPU.

Audio Input is now enable by default with 48KHz sampling, 16bit samples and
2 channels. This is normally not necessary because audio is not used in
VideoTexture; it is just in case it is necessary on certain Decklink card.

1 files changed, 48 insertions, 16 deletions

diff --git a/source/gameengine/VideoTexture/VideoDeckLink.cpp b/source/gameengine/VideoTexture/VideoDeckLink.cpp
index 85de6e6d10e..032145f1e8c 100644
--- a/source/gameengine/VideoTexture/VideoDeckLink.cpp
+++ b/source/gameengine/VideoTexture/VideoDeckLink.cpp
@@ -435,7 +435,12 @@ mBufferCacheSize(cacheSize)
 
 		if (mHasDvp)
 		{
-			DVP_CHECK(dvpInitGLContext(DVP_DEVICE_FLAGS_SHARE_APP_CONTEXT));
+            // In case the DLL is not in place, don't fail, just fallback on OpenGL
+            if (dvpInitGLContext(DVP_DEVICE_FLAGS_SHARE_APP_CONTEXT) != DVP_STATUS_OK)
+            {
+                printf("Warning: Could not initialize DVP context, fallback on OpenGL transfer.\nInstall dvp.dll to take advantage of nVidia GPUDirect.");
+                mHasDvp = false;
+            }
 		}
 #endif
 		if (GLEW_AMD_pinned_memory)
@@ -727,7 +732,8 @@ VideoDeckLink::~VideoDeckLink ()
 		mDLInput->StopStreams();
 		mDLInput->SetCallback(NULL);
 		mDLInput->DisableVideoInput();
-		mDLInput->FlushStreams();
+        mDLInput->DisableAudioInput();
+        mDLInput->FlushStreams();
 		if (mDLInput->Release() != 0)
 			THRWEXCP(DeckLinkInternalError, S_OK);
 		mDLInput = NULL;
@@ -778,9 +784,9 @@ void VideoDeckLink::openCam (char *format, short camIdx)
 	BMDTimeScale					frameTimescale;
 	IDeckLink*						pDL;
 	u_int displayFlags, inputFlags; 
-	char *pPixel, *p3D;
+    char *pPixel, *p3D, *pEnd;
 	size_t len;
-	int i;
+    int i, modeIdx;
 
 	// format is constructed as <displayMode>/<pixelFormat>[/3D]
 	// <displayMode> takes the form of BMDDisplayMode identifier minus the 'bmdMode' prefix.
@@ -801,8 +807,24 @@ void VideoDeckLink::openCam (char *format, short camIdx)
 	mUse3D = (p3D) ? true : false;
 	// read the mode
 	len = (size_t)(pPixel - format);
-	// throws if bad mode
-	decklink_ReadDisplayMode(format, len, &mDisplayMode);
+    // accept integer display mode
+
+    try
+    {
+        // throws if bad mode
+        decklink_ReadDisplayMode(format, len, &mDisplayMode);
+        // found a valid mode, remember that we do not look for an index
+        modeIdx = -1;
+    }
+    catch (Exception & exp)
+    {
+        // accept also purely numerical mode as a mode index
+        modeIdx = strtol(format, &pEnd, 10);
+        if (pEnd != pPixel || modeIdx < 0)
+            // not a pure number, give up
+            throw;
+    }
+
 	// skip /
 	pPixel++;
 	len = ((mUse3D) ? (size_t)(p3D - pPixel) : strlen(pPixel));
@@ -840,15 +862,22 @@ void VideoDeckLink::openCam (char *format, short camIdx)
 	pDLDisplayMode = NULL;
 	displayFlags = (mUse3D) ? bmdDisplayModeSupports3D : 0;
 	inputFlags = (mUse3D) ? bmdVideoInputDualStream3D : bmdVideoInputFlagDefault;
-	while (pDLDisplayModeIterator->Next(&pDLDisplayMode) == S_OK) 
+    while (pDLDisplayModeIterator->Next(&pDLDisplayMode) == S_OK)
 	{
-		if (   pDLDisplayMode->GetDisplayMode() == mDisplayMode
-			&& (pDLDisplayMode->GetFlags() & displayFlags) == displayFlags
-			&& mDLInput->DoesSupportVideoMode(mDisplayMode, mPixelFormat, inputFlags, &modeSupport, NULL) == S_OK
-			&& modeSupport == bmdDisplayModeSupported)
-			break;
+        if (modeIdx == 0 || pDLDisplayMode->GetDisplayMode() == mDisplayMode)
+        {
+            // in case we get here because of modeIdx, make sure we have mDisplayMode set
+            mDisplayMode = pDLDisplayMode->GetDisplayMode();
+            if (   (pDLDisplayMode->GetFlags() & displayFlags) == displayFlags
+                && mDLInput->DoesSupportVideoMode(mDisplayMode, mPixelFormat, inputFlags, &modeSupport, NULL) == S_OK
+                && modeSupport == bmdDisplayModeSupported)
+                break;
+        }
 		pDLDisplayMode->Release();
 		pDLDisplayMode = NULL;
+        if (modeIdx-- == 0)
+            // reached the correct mode index but it does not meet the pixel format, give up
+            break;
 	}
 	pDLDisplayModeIterator->Release();
 
@@ -943,13 +972,16 @@ void VideoDeckLink::openCam (char *format, short camIdx)
 	if (mDLInput->SetVideoInputFrameMemoryAllocator(mpAllocator) != S_OK)
 		THRWEXCP(DeckLinkInternalError, S_OK);
 
-	if (mDLInput->EnableVideoInput(mDisplayMode, mPixelFormat, ((mUse3D) ? bmdVideoInputDualStream3D : bmdVideoInputFlagDefault)) != S_OK)
+    mpCaptureDelegate = new CaptureDelegate(this);
+    if (mDLInput->SetCallback(mpCaptureDelegate) != S_OK)
+        THRWEXCP(DeckLinkInternalError, S_OK);
+
+    if (mDLInput->EnableVideoInput(mDisplayMode, mPixelFormat, ((mUse3D) ? bmdVideoInputDualStream3D : bmdVideoInputFlagDefault)) != S_OK)
 		// this shouldn't failed, we tested above
 		THRWEXCP(DeckLinkInternalError, S_OK); 
 
-	mpCaptureDelegate = new CaptureDelegate(this);
-	if (mDLInput->SetCallback(mpCaptureDelegate) != S_OK)
-		THRWEXCP(DeckLinkInternalError, S_OK);
+    // just in case it is needed to capture from certain cards, we don't check error because we don't need audio
+    mDLInput->EnableAudioInput(bmdAudioSampleRate48kHz, 16, 2);
 
 	// open base class
 	VideoBase::openCam(format, camIdx);