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/* -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 <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <dlfcn.h>
#include <ctype.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;
static 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());
}
static 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();
}
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