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      1 /* -LICENSE-START-
      2 ** Copyright (c) 2011 Blackmagic Design
      3 **
      4 ** Permission is hereby granted, free of charge, to any person or organization
      5 ** obtaining a copy of the software and accompanying documentation covered by
      6 ** this license (the "Software") to use, reproduce, display, distribute,
      7 ** execute, and transmit the Software, and to prepare derivative works of the
      8 ** Software, and to permit third-parties to whom the Software is furnished to
      9 ** do so, all subject to the following:
     10 **
     11 ** The copyright notices in the Software and this entire statement, including
     12 ** the above license grant, this restriction and the following disclaimer,
     13 ** must be included in all copies of the Software, in whole or in part, and
     14 ** all derivative works of the Software, unless such copies or derivative
     15 ** works are solely in the form of machine-executable object code generated by
     16 ** a source language processor.
     17 **
     18 ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     19 ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     20 ** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
     21 ** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
     22 ** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
     23 ** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     24 ** DEALINGS IN THE SOFTWARE.
     25 ** -LICENSE-END-
     26 */
     27 /* DeckLinkAPIDispatch.cpp */
     28 
     29 #include "DeckLinkAPI_v8_0.h"
     30 #include <pthread.h>
     31 
     32 #if BLACKMAGIC_DECKLINK_API_MAGIC != 1
     33 	#error The DeckLink API version of DeckLinkAPIDispatch.cpp is not the same version as DeckLinkAPI.h
     34 #endif
     35 
     36 #define kDeckLinkAPI_BundlePath "/Library/Frameworks/DeckLinkAPI.framework"
     37 
     38 typedef IDeckLinkIterator_v8_0* (*CreateIteratorFunc)(void);
     39 typedef IDeckLinkAPIInformation* (*CreateAPIInformationFunc)(void);
     40 typedef IDeckLinkGLScreenPreviewHelper* (*CreateOpenGLScreenPreviewHelperFunc)(void);
     41 typedef IDeckLinkCocoaScreenPreviewCallback* (*CreateCocoaScreenPreviewFunc)(void*);
     42 typedef IDeckLinkVideoConversion* (*CreateVideoConversionInstanceFunc)(void);
     43 
     44 static pthread_once_t						gDeckLinkOnceControl		= PTHREAD_ONCE_INIT;
     45 static CFBundleRef							gDeckLinkAPIBundleRef		= NULL;
     46 static CreateIteratorFunc					gCreateIteratorFunc			= NULL;
     47 static CreateAPIInformationFunc				gCreateAPIInformationFunc	= NULL;
     48 static CreateOpenGLScreenPreviewHelperFunc	gCreateOpenGLPreviewFunc	= NULL;
     49 static CreateCocoaScreenPreviewFunc			gCreateCocoaPreviewFunc		= NULL;
     50 static CreateVideoConversionInstanceFunc	gCreateVideoConversionFunc	= NULL;
     51 
     52 
     53 void	InitDeckLinkAPI (void)
     54 {
     55 	CFURLRef		bundleURL;
     56 
     57 	bundleURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, CFSTR(kDeckLinkAPI_BundlePath), kCFURLPOSIXPathStyle, true);
     58 	if (bundleURL != NULL)
     59 	{
     60 		gDeckLinkAPIBundleRef = CFBundleCreate(kCFAllocatorDefault, bundleURL);
     61 		if (gDeckLinkAPIBundleRef != NULL)
     62 		{
     63 			gCreateIteratorFunc = (CreateIteratorFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateDeckLinkIteratorInstance_0001"));
     64 			gCreateAPIInformationFunc = (CreateAPIInformationFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateDeckLinkAPIInformationInstance_0001"));
     65 			gCreateOpenGLPreviewFunc = (CreateOpenGLScreenPreviewHelperFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateOpenGLScreenPreviewHelper_0001"));
     66 			gCreateCocoaPreviewFunc = (CreateCocoaScreenPreviewFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateCocoaScreenPreview_0001"));
     67 			gCreateVideoConversionFunc = (CreateVideoConversionInstanceFunc)CFBundleGetFunctionPointerForName(gDeckLinkAPIBundleRef, CFSTR("CreateVideoConversionInstance_0001"));
     68 		}
     69 		CFRelease(bundleURL);
     70 	}
     71 }
     72 
     73 bool		IsDeckLinkAPIPresent (void)
     74 {
     75 	// If the DeckLink API bundle was successfully loaded, return this knowledge to the caller
     76 	if (gDeckLinkAPIBundleRef != NULL)
     77 		return true;
     78 
     79 	return false;
     80 }
     81 
     82 IDeckLinkIterator_v8_0*		CreateDeckLinkIteratorInstance (void)
     83 {
     84 	pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
     85 
     86 	if (gCreateIteratorFunc == NULL)
     87 		return NULL;
     88 
     89 	return gCreateIteratorFunc();
     90 }
     91 
     92 IDeckLinkAPIInformation*	CreateDeckLinkAPIInformationInstance (void)
     93 {
     94 	pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
     95 
     96 	if (gCreateAPIInformationFunc == NULL)
     97 		return NULL;
     98 
     99 	return gCreateAPIInformationFunc();
    100 }
    101 
    102 IDeckLinkGLScreenPreviewHelper*		CreateOpenGLScreenPreviewHelper (void)
    103 {
    104 	pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
    105 
    106 	if (gCreateOpenGLPreviewFunc == NULL)
    107 		return NULL;
    108 
    109 	return gCreateOpenGLPreviewFunc();
    110 }
    111 
    112 IDeckLinkCocoaScreenPreviewCallback*	CreateCocoaScreenPreview (void* parentView)
    113 {
    114 	pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
    115 
    116 	if (gCreateCocoaPreviewFunc == NULL)
    117 		return NULL;
    118 
    119 	return gCreateCocoaPreviewFunc(parentView);
    120 }
    121 
    122 IDeckLinkVideoConversion* CreateVideoConversionInstance (void)
    123 {
    124 	pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
    125 
    126 	if (gCreateVideoConversionFunc == NULL)
    127 		return NULL;
    128 
    129 	return gCreateVideoConversionFunc();
    130 }
    131 
    132