mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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175 lines
6.3 KiB
C++
175 lines
6.3 KiB
C++
/* -LICENSE-START-
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** Copyright (c) 2009 Blackmagic Design
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**
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** Permission is hereby granted, free of charge, to any person or organization
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** obtaining a copy of the software and accompanying documentation (the
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** "Software") to use, reproduce, display, distribute, sub-license, execute,
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** and transmit the Software, and to prepare derivative works of the Software,
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** and to permit third-parties to whom the Software is furnished to do so, in
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** accordance with:
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**
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** (1) if the Software is obtained from Blackmagic Design, the End User License
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** Agreement for the Software Development Kit (“EULA”) available at
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** https://www.blackmagicdesign.com/EULA/DeckLinkSDK; or
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**
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** (2) if the Software is obtained from any third party, such licensing terms
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** as notified by that third party,
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**
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** and all subject to the following:
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**
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** (3) the copyright notices in the Software and this entire statement,
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** including the above license grant, this restriction and the following
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** disclaimer, must be included in all copies of the Software, in whole or in
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** part, and all derivative works of the Software, unless such copies or
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** derivative works are solely in the form of machine-executable object code
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** generated by a source language processor.
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**
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** (4) THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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** OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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** SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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** FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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** DEALINGS IN THE SOFTWARE.
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**
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** A copy of the Software is available free of charge at
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** https://www.blackmagicdesign.com/desktopvideo_sdk under the EULA.
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**
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** -LICENSE-END-
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**/
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#include <stdio.h>
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#include <pthread.h>
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#include <dlfcn.h>
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#include "DeckLinkAPI.h"
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#define kDeckLinkAPI_Name "libDeckLinkAPI.so"
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#define KDeckLinkPreviewAPI_Name "libDeckLinkPreviewAPI.so"
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typedef IDeckLinkIterator* (*CreateIteratorFunc)(void);
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typedef IDeckLinkAPIInformation* (*CreateAPIInformationFunc)(void);
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typedef IDeckLinkGLScreenPreviewHelper* (*CreateOpenGLScreenPreviewHelperFunc)(void);
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typedef IDeckLinkVideoConversion* (*CreateVideoConversionInstanceFunc)(void);
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typedef IDeckLinkDiscovery* (*CreateDeckLinkDiscoveryInstanceFunc)(void);
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typedef IDeckLinkVideoFrameAncillaryPackets* (*CreateVideoFrameAncillaryPacketsInstanceFunc)(void);
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static pthread_once_t gDeckLinkOnceControl = PTHREAD_ONCE_INIT;
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static pthread_once_t gPreviewOnceControl = PTHREAD_ONCE_INIT;
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static bool gLoadedDeckLinkAPI = false;
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static CreateIteratorFunc gCreateIteratorFunc = NULL;
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static CreateAPIInformationFunc gCreateAPIInformationFunc = NULL;
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static CreateOpenGLScreenPreviewHelperFunc gCreateOpenGLPreviewFunc = NULL;
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static CreateVideoConversionInstanceFunc gCreateVideoConversionFunc = NULL;
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static CreateDeckLinkDiscoveryInstanceFunc gCreateDeckLinkDiscoveryFunc = NULL;
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static CreateVideoFrameAncillaryPacketsInstanceFunc gCreateVideoFrameAncillaryPacketsFunc = NULL;
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static void InitDeckLinkAPI (void)
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{
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void *libraryHandle;
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libraryHandle = dlopen(kDeckLinkAPI_Name, RTLD_NOW|RTLD_GLOBAL);
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if (!libraryHandle)
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{
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// fprintf(stderr, "%s\n", dlerror());
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return;
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}
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gLoadedDeckLinkAPI = true;
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gCreateIteratorFunc = (CreateIteratorFunc)dlsym(libraryHandle, "CreateDeckLinkIteratorInstance_0004");
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if (!gCreateIteratorFunc)
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fprintf(stderr, "%s\n", dlerror());
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gCreateAPIInformationFunc = (CreateAPIInformationFunc)dlsym(libraryHandle, "CreateDeckLinkAPIInformationInstance_0001");
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if (!gCreateAPIInformationFunc)
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fprintf(stderr, "%s\n", dlerror());
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gCreateVideoConversionFunc = (CreateVideoConversionInstanceFunc)dlsym(libraryHandle, "CreateVideoConversionInstance_0001");
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if (!gCreateVideoConversionFunc)
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fprintf(stderr, "%s\n", dlerror());
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gCreateDeckLinkDiscoveryFunc = (CreateDeckLinkDiscoveryInstanceFunc)dlsym(libraryHandle, "CreateDeckLinkDiscoveryInstance_0003");
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if (!gCreateDeckLinkDiscoveryFunc)
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fprintf(stderr, "%s\n", dlerror());
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gCreateVideoFrameAncillaryPacketsFunc = (CreateVideoFrameAncillaryPacketsInstanceFunc)dlsym(libraryHandle, "CreateVideoFrameAncillaryPacketsInstance_0001");
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if (!gCreateVideoFrameAncillaryPacketsFunc)
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fprintf(stderr, "%s\n", dlerror());
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}
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static void InitDeckLinkPreviewAPI (void)
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{
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void *libraryHandle;
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libraryHandle = dlopen(KDeckLinkPreviewAPI_Name, RTLD_NOW|RTLD_GLOBAL);
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if (!libraryHandle)
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{
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fprintf(stderr, "%s\n", dlerror());
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return;
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}
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gCreateOpenGLPreviewFunc = (CreateOpenGLScreenPreviewHelperFunc)dlsym(libraryHandle, "CreateOpenGLScreenPreviewHelper_0001");
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if (!gCreateOpenGLPreviewFunc)
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fprintf(stderr, "%s\n", dlerror());
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}
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#if 0
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bool IsDeckLinkAPIPresent (void)
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{
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// If the DeckLink API dynamic library was successfully loaded, return this knowledge to the caller
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return gLoadedDeckLinkAPI;
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}
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#endif
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IDeckLinkIterator* CreateDeckLinkIteratorInstance (void)
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{
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pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
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if (gCreateIteratorFunc == NULL)
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return NULL;
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return gCreateIteratorFunc();
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}
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IDeckLinkAPIInformation* CreateDeckLinkAPIInformationInstance (void)
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{
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pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
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if (gCreateAPIInformationFunc == NULL)
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return NULL;
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return gCreateAPIInformationFunc();
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}
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IDeckLinkGLScreenPreviewHelper* CreateOpenGLScreenPreviewHelper (void)
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{
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pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
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pthread_once(&gPreviewOnceControl, InitDeckLinkPreviewAPI);
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if (gCreateOpenGLPreviewFunc == NULL)
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return NULL;
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return gCreateOpenGLPreviewFunc();
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}
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IDeckLinkVideoConversion* CreateVideoConversionInstance (void)
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{
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pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
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if (gCreateVideoConversionFunc == NULL)
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return NULL;
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return gCreateVideoConversionFunc();
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}
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IDeckLinkDiscovery* CreateDeckLinkDiscoveryInstance (void)
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{
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pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
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if (gCreateDeckLinkDiscoveryFunc == NULL)
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return NULL;
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return gCreateDeckLinkDiscoveryFunc();
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}
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IDeckLinkVideoFrameAncillaryPackets* CreateVideoFrameAncillaryPacketsInstance (void)
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{
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pthread_once(&gDeckLinkOnceControl, InitDeckLinkAPI);
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if (gCreateVideoFrameAncillaryPacketsFunc == NULL)
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return NULL;
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return gCreateVideoFrameAncillaryPacketsFunc();
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}
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