2 ** Copyright (c) 2009 Blackmagic Design
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:
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.
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.
32 #include "DeckLinkAPI.h"
34 #define kDeckLinkAPI_Name "libDeckLinkAPI.so"
35 #define KDeckLinkPreviewAPI_Name "libDeckLinkPreviewAPI.so"
37 typedef IDeckLinkIterator* (*CreateIteratorFunc)(void);
38 typedef IDeckLinkAPIInformation* (*CreateAPIInformationFunc)(void);
39 typedef IDeckLinkGLScreenPreviewHelper* (*CreateOpenGLScreenPreviewHelperFunc)(void);
40 typedef IDeckLinkVideoConversion* (*CreateVideoConversionInstanceFunc)(void);
41 typedef IDeckLinkDiscovery* (*CreateDeckLinkDiscoveryInstanceFunc)(void);
43 static pthread_once_t gDeckLinkOnceControl = PTHREAD_ONCE_INIT;
44 static pthread_once_t gPreviewOnceControl = PTHREAD_ONCE_INIT;
46 static bool gLoadedDeckLinkAPI = false;
48 static CreateIteratorFunc gCreateIteratorFunc = NULL;
49 static CreateAPIInformationFunc gCreateAPIInformationFunc = NULL;
50 static CreateOpenGLScreenPreviewHelperFunc gCreateOpenGLPreviewFunc = NULL;
51 static CreateVideoConversionInstanceFunc gCreateVideoConversionFunc = NULL;
52 static CreateDeckLinkDiscoveryInstanceFunc gCreateDeckLinkDiscoveryFunc = NULL;
54 void InitDeckLinkAPI (void)
58 libraryHandle = dlopen(kDeckLinkAPI_Name, RTLD_NOW|RTLD_GLOBAL);
61 fprintf(stderr, "%s\n", dlerror());
65 gLoadedDeckLinkAPI = true;
67 gCreateIteratorFunc = (CreateIteratorFunc)dlsym(libraryHandle, "CreateDeckLinkIteratorInstance_0002");
68 if (!gCreateIteratorFunc)
69 fprintf(stderr, "%s\n", dlerror());
70 gCreateAPIInformationFunc = (CreateAPIInformationFunc)dlsym(libraryHandle, "CreateDeckLinkAPIInformationInstance_0001");
71 if (!gCreateAPIInformationFunc)
72 fprintf(stderr, "%s\n", dlerror());
73 gCreateVideoConversionFunc = (CreateVideoConversionInstanceFunc)dlsym(libraryHandle, "CreateVideoConversionInstance_0001");
74 if (!gCreateVideoConversionFunc)
75 fprintf(stderr, "%s\n", dlerror());
76 gCreateDeckLinkDiscoveryFunc = (CreateDeckLinkDiscoveryInstanceFunc)dlsym(libraryHandle, "CreateDeckLinkDiscoveryInstance_0001");
77 if (!gCreateDeckLinkDiscoveryFunc)
78 fprintf(stderr, "%s\n", dlerror());
81 void InitDeckLinkPreviewAPI (void)
85 libraryHandle = dlopen(KDeckLinkPreviewAPI_Name, RTLD_NOW|RTLD_GLOBAL);
88 fprintf(stderr, "%s\n", dlerror());
91 gCreateOpenGLPreviewFunc = (CreateOpenGLScreenPreviewHelperFunc)dlsym(libraryHandle, "CreateOpenGLScreenPreviewHelper_0001");
92 if (!gCreateOpenGLPreviewFunc)
93 fprintf(stderr, "%s\n", dlerror());
96 bool IsDeckLinkAPIPresent (void)
98 // If the DeckLink API dynamic library was successfully loaded, return this knowledge to the caller
99 return gLoadedDeckLinkAPI;
102 IDeckLinkIterator* CreateDeckLinkIteratorInstance (void)
104 pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
106 if (gCreateIteratorFunc == NULL)
108 return gCreateIteratorFunc();
111 IDeckLinkAPIInformation* CreateDeckLinkAPIInformationInstance (void)
113 pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
115 if (gCreateAPIInformationFunc == NULL)
117 return gCreateAPIInformationFunc();
120 IDeckLinkGLScreenPreviewHelper* CreateOpenGLScreenPreviewHelper (void)
122 pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
123 pthread_once(&gPreviewOnceControl, InitDeckLinkPreviewAPI);
125 if (gCreateOpenGLPreviewFunc == NULL)
127 return gCreateOpenGLPreviewFunc();
130 IDeckLinkVideoConversion* CreateVideoConversionInstance (void)
132 pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
134 if (gCreateVideoConversionFunc == NULL)
136 return gCreateVideoConversionFunc();
139 IDeckLinkDiscovery* CreateDeckLinkDiscoveryInstance (void)
141 pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
143 if (gCreateDeckLinkDiscoveryFunc == NULL)
145 return gCreateDeckLinkDiscoveryFunc();