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| Hi ! I am trying to remove any memory link from my application that uses a DisplayLink to display QT movies. I tried to use the command line utility "leaks" this way (I can't use objectalloc or such because my app is full screen) : MallocStackLogging=1 ./myApp and in a SSH session I type : leaks thePidOfMyApp Good ! I can correct my memory links now. But I am also warned of tons of leaks concerning the DisplayLink like the following : Leak: 0x019ec000 size=3072 string '' Call stack: [thread ffffffff]: | 0x0 | _pthread_body | CVDisplayLink::runIOThread() | CVDisplayLink::performIO(CVTimeStamp*) | myCVDisplayLinkOutputCallback | -[EasyshadowPlayer renderAtTime:] | -[EasyshadowPlayer renderVideoChannel:withRenderer:atTime:andLocalTime:] | -[VideoChannel setNewFrameIfPossibleAtTime:onRenderer:] | QTVisualContextCopyImageForTime | QTVCCopyImageForTime | CallComponentDispatch | OpenGLTVC_ComponentDispatch | CallComponentFunctionCommon | OpenGLTVC_CopyImageForTime | QTVCCopyImageForTime | CallComponentDispatch | BaseVC_ComponentDispatch | CallComponentFunctionCommon | BaseVC_CopyImageForTime | QTVUGenerateImage | CallComponentDispatch | VisualAdjustmentVU_ComponentDispatch | CallComponentFunctionCommon | VisualAdjustmentVU_GenerateImage | CVOpenGLBufferBacking::attach(_CGLContextObject*, unsigned long, long, long) | CGLSetPBuffer | cglSetAnyDrawable | cglSetContextScreen | gliAttachDrawableWithOptions | gliSetCurrentPluginDispatchTable | gldInitDispatch | gldUpdateDispatch | glrUpdateHardwareState | glrIntelGeneratePolyStippleTexture | glrIntelGenerateInternalTexture | calloc Leak: 0x136d62f0 size=80 0x00000000 0x00000003 0x00000000 0x00000000 ................ 0x00000000 0x00000000 0x136d630c 0x00000000 .........cm..... 0x136d6308 0x00000000 0x00000000 0x00000000 .cm............. 0x019ec000 0x00000000 0x00000704 0x019ec000 ................ 0x00000000 0x00000000 0x00000000 0x00000000 ................ Call stack: [thread 4765a67]: | 0x0 | _pthread_body | CVDisplayLink::runIOThread() | CVDisplayLink::performIO(CVTimeStamp*) | myCVDisplayLinkOutputCallback | -[EasyshadowPlayer renderAtTime:] | -[EasyshadowPlayer renderVideoChannel:withRenderer:atTime:andLocalTime:] | -[VideoChannel setNewFrameIfPossibleAtTime:onRenderer:] | QTVisualContextCopyImageForTime | QTVCCopyImageForTime | CallComponentDispatch | OpenGLTVC_ComponentDispatch | CallComponentFunctionCommon | OpenGLTVC_CopyImageForTime | QTVCCopyImageForTime | CallComponentDispatch | BaseVC_ComponentDispatch | CallComponentFunctionCommon | BaseVC_CopyImageForTime | QTVUGenerateImage | CallComponentDispatch | VisualAdjustmentVU_ComponentDispatch | CallComponentFunctionCommon | VisualAdjustmentVU_GenerateImage | CVOpenGLBufferBacking::attach(_CGLContextObject*, unsigned long, long, long) | CGLSetPBuffer | cglSetAnyDrawable | cglSetContextScreen | gliAttachDrawableWithOptions | gliSetCurrentPluginDispatchTable | gldInitDispatch | gldUpdateDispatch | glrUpdateHardwareState | glrIntelGeneratePolyStippleTexture | glrIntelGenerateInternalTexture | gldCreateTexture | calloc Leak: 0x136e2b00 size=80 0x00000000 0x00000003 0x00000000 0x00000000 ................ 0x00000000 0x00000000 0x136e2b1c 0x00000000 .........+n..... 0x136e2b18 0x00000000 0x00000000 0x00000000 .+n............. 0x019eb400 0x00000000 0x00000704 0x019eb400 ................ 0x00000000 0x00000000 0x00000000 0x00000000 ................ Call stack: [thread 4765a67]: | 0x0 | _pthread_body | CVDisplayLink::runIOThread() | CVDisplayLink::performIO(CVTimeStamp*) | myCVDisplayLinkOutputCallback | -[EasyshadowPlayer renderAtTime:] | -[EasyshadowPlayer renderVideoChannel:withRenderer:atTime:andLocalTime:] | -[VideoChannel setNewFrameIfPossibleAtTime:onRenderer:] | QTVisualContextCopyImageForTime | QTVCCopyImageForTime | CallComponentDispatch | OpenGLTVC_ComponentDispatch | CallComponentFunctionCommon | OpenGLTVC_CopyImageForTime | QTVCCopyImageForTime | CallComponentDispatch | BaseVC_ComponentDispatch | CallComponentFunctionCommon | BaseVC_CopyImageForTime | QTVUGenerateImage | CallComponentDispatch | VisualAdjustmentVU_ComponentDispatch | CallComponentFunctionCommon | VisualAdjustmentVU_GenerateImage | CVOpenGLBufferBacking::attach(_CGLContextObject*, unsigned long, long, long) | CGLSetPBuffer | cglSetAnyDrawable | cglSetContextScreen | gliAttachDrawableWithOptions | gliSetCurrentPluginDispatchTable | gldInitDispatch | gldUpdateDispatch | glrUpdateHardwareState | glrIntelGenerateLineStippleTexture | glrIntelGenerateInternalTexture | gldCreateTexture | calloc Here is my portion of code that calls QTVisualContextCopyImageForTime : if(!channelMovie){ if(![renderer setValue:nil forInputKey:kVideoImageInputKey]) NSLog(@"Could not pass nil frame to composition"); } //Check if a new frame is available from the movie if(QTVisualContextIsNewImageAvailable(qtVisualContext, time)) { CVOpenGLTextureRef texture = NULL; if( QTVisualContextCopyImageForTime(qtVisualContext, nil, time, &texture) == noErr ){ // get the texture for the frame // the above call may produce a null texture so we must check for this first if(texture != NULL){ //Pass updated movie frames cache to the composition if(![renderer setValue:(id)texture forInputKey:kVideoImageInputKey]) NSLog(@"Could not pass frames cache to composition"); } } CVOpenGLTextureRelease(texture); return YES; } return NO; Did I do something wrong or is this a known leak? Can I do anything about it? Can it have consequences on an app that should keep running without crashing for months? Fabrice Pipart International Corporate Consulting Palais de la Scala 1 avenue Henri Dunant Suite 1155 MC - 98000 Monaco Skype: fabrice.pipart Tel. +377 97 98 21 04 (direct) Fax. +377 97 70 88 07 |
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