Mac Video Capture: Add Blackmagic DeckLink SDK for Mac to third_party folder

third_party/decklink/mac/include/DeckLinkAPIDispatch_v8_0.cpp

+/* -LICENSE-START-
+** Copyright (c) 2011 Blackmagic Design
+**
+** Permission is hereby granted, free of charge, to any person or organization
+** obtaining a copy of the software and accompanying documentation covered by
+** this license (the "Software") to use, reproduce, display, distribute,
+** execute, and transmit the Software, and to prepare derivative works of the
+** Software, and to permit third-parties to whom the Software is furnished to
+** do so, all subject to the following:
+** 
+** The copyright notices in the Software and this entire statement, including
+** the above license grant, this restriction and the following disclaimer,
+** must be included in all copies of the Software, in whole or in part, and
+** all derivative works of the Software, unless such copies or derivative
+** works are solely in the form of machine-executable object code generated by
+** a source language processor.
+** 
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+** DEALINGS IN THE SOFTWARE.
+** -LICENSE-END-
+*/
+/* DeckLinkAPIDispatch.cpp */
+
+#include "DeckLinkAPI_v8_0.h"
+#include <pthread.h>
+
+#if BLACKMAGIC_DECKLINK_API_MAGIC != 1
+        #error The DeckLink API version of DeckLinkAPIDispatch.cpp is not the same version as DeckLinkAPI.h
+#endif
+
+#define kDeckLinkAPI_BundlePath "/Library/Frameworks/DeckLinkAPI.framework"
+
+typedef IDeckLinkIterator_v8_0* (*CreateIteratorFunc)(void);
+typedef IDeckLinkAPIInformation* (*CreateAPIInformationFunc)(void);
+typedef IDeckLinkGLScreenPreviewHelper* (*CreateOpenGLScreenPreviewHelperFunc)(void);
+typedef IDeckLinkCocoaScreenPreviewCallback* (*CreateCocoaScreenPreviewFunc)(void*);
+typedef IDeckLinkVideoConversion* (*CreateVideoConversionInstanceFunc)(void);
+
+static pthread_once_t                                           gDeckLinkOnceControl            = PTHREAD_ONCE_INIT;
+static CFBundleRef                                                      gDeckLinkAPIBundleRef           = NULL;
+static CreateIteratorFunc                                       gCreateIteratorFunc                     = NULL;
+static CreateAPIInformationFunc                         gCreateAPIInformationFunc       = NULL;
+static CreateOpenGLScreenPreviewHelperFunc      gCreateOpenGLPreviewFunc        = NULL;
+static CreateCocoaScreenPreviewFunc                     gCreateCocoaPreviewFunc         = NULL;
+static CreateVideoConversionInstanceFunc        gCreateVideoConversionFunc      = NULL;
+
+
+void    InitDeckLinkAPI (void)
+{
+        CFURLRef                bundleURL;
+
+        bundleURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, CFSTR(kDeckLinkAPI_BundlePath), kCFURLPOSIXPathStyle, true);
+        if (bundleURL != NULL)
+        {
+                gDeckLinkAPIBundleRef = CFBundleCreate(kCFAllocatorDefault, bundleURL);
+                if (gDeckLinkAPIBundleRef != NULL)
+                {
+                        gCreateIteratorFunc = (CreateIteratorFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateDeckLinkIteratorInstance_0001"));
+                        gCreateAPIInformationFunc = (CreateAPIInformationFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateDeckLinkAPIInformationInstance_0001"));
+                        gCreateOpenGLPreviewFunc = (CreateOpenGLScreenPreviewHelperFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateOpenGLScreenPreviewHelper_0001"));
+                        gCreateCocoaPreviewFunc = (CreateCocoaScreenPreviewFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateCocoaScreenPreview_0001"));
+                        gCreateVideoConversionFunc = (CreateVideoConversionInstanceFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateVideoConversionInstance_0001"));
+                }
+                CFRelease(bundleURL);
+        }
+}
+
+bool            IsDeckLinkAPIPresent (void)
+{
+        // If the DeckLink API bundle was successfully loaded, return this knowledge to the caller
+        if (gDeckLinkAPIBundleRef != NULL)
+                return true;
+        
+        return false;
+}
+
+IDeckLinkIterator_v8_0*         CreateDeckLinkIteratorInstance (void)
+{
+        pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+        
+        if (gCreateIteratorFunc == NULL)
+                return NULL;
+        
+        return gCreateIteratorFunc();
+}
+
+IDeckLinkAPIInformation*        CreateDeckLinkAPIInformationInstance (void)
+{
+        pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+        
+        if (gCreateAPIInformationFunc == NULL)
+                return NULL;
+        
+        return gCreateAPIInformationFunc();
+}
+
+IDeckLinkGLScreenPreviewHelper*         CreateOpenGLScreenPreviewHelper (void)
+{
+        pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+        
+        if (gCreateOpenGLPreviewFunc == NULL)
+                return NULL;
+        
+        return gCreateOpenGLPreviewFunc();
+}
+
+IDeckLinkCocoaScreenPreviewCallback*    CreateCocoaScreenPreview (void* parentView)
+{
+        pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+        
+        if (gCreateCocoaPreviewFunc == NULL)
+                return NULL;
+        
+        return gCreateCocoaPreviewFunc(parentView);
+}
+
+IDeckLinkVideoConversion* CreateVideoConversionInstance (void)
+{
+        pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+        
+        if (gCreateVideoConversionFunc == NULL)
+                return NULL;
+        
+        return gCreateVideoConversionFunc();
+}
+