git.sesse.net Git - mlt/blob - src/modules/decklink/darwin/DeckLinkAPIDispatch.cpp

   1 /* -LICENSE-START-
   2 ** Copyright (c) 2009 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.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/Application Support/Blackmagic Design/Blackmagic DeckLink/DeckLinkAPI.bundle"
  37
  38 typedef IDeckLinkIterator* (*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                                                      gBundleRef                                      = 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                 gBundleRef = CFBundleCreate(kCFAllocatorDefault, bundleURL);
  61                 if (gBundleRef != NULL)
  62                 {
  63                         gCreateIteratorFunc = (CreateIteratorFunc)CFBundleGetFunctionPointerForName(gBundleRef, CFSTR("CreateDeckLinkIteratorInstance_0001"));
  64                         gCreateAPIInformationFunc = (CreateAPIInformationFunc)CFBundleGetFunctionPointerForName(gBundleRef, CFSTR("CreateDeckLinkAPIInformationInstance_0001"));
  65                         gCreateOpenGLPreviewFunc = (CreateOpenGLScreenPreviewHelperFunc)CFBundleGetFunctionPointerForName(gBundleRef, CFSTR("CreateOpenGLScreenPreviewHelper_0001"));
  66                         gCreateCocoaPreviewFunc = (CreateCocoaScreenPreviewFunc)CFBundleGetFunctionPointerForName(gBundleRef, CFSTR("CreateCocoaScreenPreview_0001"));
  67                         gCreateVideoConversionFunc = (CreateVideoConversionInstanceFunc)CFBundleGetFunctionPointerForName(gBundleRef, 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 (gBundleRef != NULL)
  77                 return true;
  78
  79         return false;
  80 }
  81
  82 IDeckLinkIterator*              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