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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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110 lines
3.8 KiB
C++
110 lines
3.8 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 covered by
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** this license (the "Software") to use, reproduce, display, distribute,
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** execute, and transmit the Software, and to prepare derivative works of the
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** Software, and to permit third-parties to whom the Software is furnished to
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** do so, all subject to the following:
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**
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** The copyright notices in the Software and this entire statement, including
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** the above license grant, this restriction and the following disclaimer,
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** must be included in all copies of the Software, in whole or in part, and
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** all derivative works of the Software, unless such copies or derivative
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** works are solely in the form of machine-executable object code generated by
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** a source language processor.
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**
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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** 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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** -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 IDeckLinkGLScreenPreviewHelper* (*CreateOpenGLScreenPreviewHelperFunc)(void);
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typedef IDeckLinkVideoConversion* (*CreateVideoConversionInstanceFunc)(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 CreateIteratorFunc gCreateIteratorFunc = NULL;
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static CreateOpenGLScreenPreviewHelperFunc gCreateOpenGLPreviewFunc = NULL;
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static CreateVideoConversionInstanceFunc gCreateVideoConversionFunc = NULL;
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static
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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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gCreateIteratorFunc = (CreateIteratorFunc)dlsym(libraryHandle, "CreateDeckLinkIteratorInstance_0001");
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if (!gCreateIteratorFunc)
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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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}
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static
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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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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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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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