Deck in the relevant (and free) parts of the DeckLink API.

[nageru] / decklink / DeckLinkAPIDispatch.cpp

diff --git a/decklink/DeckLinkAPIDispatch.cpp b/decklink/DeckLinkAPIDispatch.cpp
new file mode 100755 (executable)
index 0000000..a3d2f2b
--- /dev/null
+++ b/decklink/DeckLinkAPIDispatch.cpp
@@ -0,0 +1,146 @@
+/* -LICENSE-START-
+** Copyright (c) 2009 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-
+**/
+
+#include <stdio.h>
+#include <pthread.h>
+#include <dlfcn.h>
+
+#include "DeckLinkAPI.h"
+
+#define kDeckLinkAPI_Name "libDeckLinkAPI.so"
+#define KDeckLinkPreviewAPI_Name "libDeckLinkPreviewAPI.so"
+
+typedef IDeckLinkIterator* (*CreateIteratorFunc)(void);
+typedef IDeckLinkAPIInformation* (*CreateAPIInformationFunc)(void);
+typedef IDeckLinkGLScreenPreviewHelper* (*CreateOpenGLScreenPreviewHelperFunc)(void);
+typedef IDeckLinkVideoConversion* (*CreateVideoConversionInstanceFunc)(void);
+typedef IDeckLinkDiscovery* (*CreateDeckLinkDiscoveryInstanceFunc)(void);
+
+static pthread_once_t                                  gDeckLinkOnceControl = PTHREAD_ONCE_INIT;
+static pthread_once_t                                  gPreviewOnceControl = PTHREAD_ONCE_INIT;
+
+static bool                                                            gLoadedDeckLinkAPI = false;
+
+static CreateIteratorFunc                                      gCreateIteratorFunc = NULL;
+static CreateAPIInformationFunc                                gCreateAPIInformationFunc = NULL;
+static CreateOpenGLScreenPreviewHelperFunc     gCreateOpenGLPreviewFunc = NULL;
+static CreateVideoConversionInstanceFunc       gCreateVideoConversionFunc      = NULL;
+static CreateDeckLinkDiscoveryInstanceFunc     gCreateDeckLinkDiscoveryFunc = NULL;
+
+void   InitDeckLinkAPI (void)
+{
+       void *libraryHandle;
+       
+       libraryHandle = dlopen(kDeckLinkAPI_Name, RTLD_NOW|RTLD_GLOBAL);
+       if (!libraryHandle)
+       {
+               fprintf(stderr, "%s\n", dlerror());
+               return;
+       }
+       
+       gLoadedDeckLinkAPI = true;
+       
+       gCreateIteratorFunc = (CreateIteratorFunc)dlsym(libraryHandle, "CreateDeckLinkIteratorInstance_0002");
+       if (!gCreateIteratorFunc)
+               fprintf(stderr, "%s\n", dlerror());
+       gCreateAPIInformationFunc = (CreateAPIInformationFunc)dlsym(libraryHandle, "CreateDeckLinkAPIInformationInstance_0001");
+       if (!gCreateAPIInformationFunc)
+               fprintf(stderr, "%s\n", dlerror());
+       gCreateVideoConversionFunc = (CreateVideoConversionInstanceFunc)dlsym(libraryHandle, "CreateVideoConversionInstance_0001");
+       if (!gCreateVideoConversionFunc)
+               fprintf(stderr, "%s\n", dlerror());
+       gCreateDeckLinkDiscoveryFunc = (CreateDeckLinkDiscoveryInstanceFunc)dlsym(libraryHandle, "CreateDeckLinkDiscoveryInstance_0001");
+       if (!gCreateDeckLinkDiscoveryFunc)
+               fprintf(stderr, "%s\n", dlerror());
+}
+
+void   InitDeckLinkPreviewAPI (void)
+{
+       void *libraryHandle;
+       
+       libraryHandle = dlopen(KDeckLinkPreviewAPI_Name, RTLD_NOW|RTLD_GLOBAL);
+       if (!libraryHandle)
+       {
+               fprintf(stderr, "%s\n", dlerror());
+               return;
+       }
+       gCreateOpenGLPreviewFunc = (CreateOpenGLScreenPreviewHelperFunc)dlsym(libraryHandle, "CreateOpenGLScreenPreviewHelper_0001");
+       if (!gCreateOpenGLPreviewFunc)
+               fprintf(stderr, "%s\n", dlerror());
+}
+
+bool           IsDeckLinkAPIPresent (void)
+{
+       // If the DeckLink API dynamic library was successfully loaded, return this knowledge to the caller
+       return gLoadedDeckLinkAPI;
+}
+
+IDeckLinkIterator*             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);
+       pthread_once(&gPreviewOnceControl, InitDeckLinkPreviewAPI);
+       
+       if (gCreateOpenGLPreviewFunc == NULL)
+               return NULL;
+       return gCreateOpenGLPreviewFunc();
+}
+
+IDeckLinkVideoConversion* CreateVideoConversionInstance (void)
+{
+       pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+       
+       if (gCreateVideoConversionFunc == NULL)
+               return NULL;
+       return gCreateVideoConversionFunc();
+}
+
+IDeckLinkDiscovery* CreateDeckLinkDiscoveryInstance (void)
+{
+       pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
+       
+       if (gCreateDeckLinkDiscoveryFunc == NULL)
+               return NULL;
+       return gCreateDeckLinkDiscoveryFunc();
+}