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opencv/modules/videoio/src/videoio_registry.cpp

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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
#include "precomp.hpp"
#include "videoio_registry.hpp"
#include "opencv2/videoio/registry.hpp"
#include "cap_intelperc.hpp"
#include "cap_dshow.hpp"
#ifdef HAVE_MFX
#include "cap_mfx_reader.hpp"
#include "cap_mfx_writer.hpp"
#endif
// All WinRT versions older than 8.0 should provide classes used for video support
#if defined(WINRT) && !defined(WINRT_8_0) && defined(__cplusplus_winrt)
# include "cap_winrt_capture.hpp"
# include "cap_winrt_bridge.hpp"
# define WINRT_VIDEO
#endif
#if defined _M_X64 && defined _MSC_VER && !defined CV_ICC
#pragma optimize("",off)
#pragma warning(disable: 4748)
#endif
using namespace cv;
namespace cv
{
static bool param_VIDEOIO_DEBUG = utils::getConfigurationParameterBool("OPENCV_VIDEOIO_DEBUG", false);
static bool param_VIDEOCAPTURE_DEBUG = utils::getConfigurationParameterBool("OPENCV_VIDEOCAPTURE_DEBUG", false);
static bool param_VIDEOWRITER_DEBUG = utils::getConfigurationParameterBool("OPENCV_VIDEOWRITER_DEBUG", false);
namespace {
#define DECLARE_BACKEND(cap, name, mode) { cap, (BackendMode)(mode), 1000, name }
/** Ordering guidelines:
- modern optimized, multi-platform libraries: ffmpeg, gstreamer, Media SDK
- platform specific universal SDK: WINRT, QTKIT/AVFOUNDATION, MSMF/VFW/DSHOW, V4L/V4L2
- RGB-D: OpenNI/OpenNI2, INTELPERC/REALSENSE
- special OpenCV (file-based): "images", "mjpeg"
- special camera SDKs, including stereo: other special SDKs: FIREWIRE/1394, XIMEA/ARAVIS/GIGANETIX/PVAPI(GigE), UNICAP
- other: XINE, gphoto2, etc
*/
static const struct VideoBackendInfo builtin_backends[] =
{
#ifdef HAVE_FFMPEG
DECLARE_BACKEND(CAP_FFMPEG, "FFMPEG", MODE_CAPTURE_BY_FILENAME | MODE_WRITER),
#endif
#ifdef HAVE_GSTREAMER
DECLARE_BACKEND(CAP_GSTREAMER, "GSTREAMER", MODE_CAPTURE_ALL | MODE_WRITER),
#endif
#ifdef HAVE_MFX // Media SDK
DECLARE_BACKEND(CAP_INTEL_MFX, "INTEL_MFX", MODE_CAPTURE_BY_FILENAME | MODE_WRITER),
#endif
// Apple platform
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
DECLARE_BACKEND(CAP_QT, "QUICKTIME", MODE_CAPTURE_ALL | MODE_WRITER),
#endif
#ifdef HAVE_AVFOUNDATION
DECLARE_BACKEND(CAP_AVFOUNDATION, "AVFOUNDATION", MODE_CAPTURE_ALL | MODE_WRITER),
#endif
// Windows
#ifdef WINRT_VIDEO
DECLARE_BACKEND(CAP_WINRT, "WINRT", MODE_CAPTURE_BY_INDEX),
#endif
#ifdef HAVE_MSMF
DECLARE_BACKEND(CAP_MSMF, "MSMF", MODE_CAPTURE_ALL | MODE_WRITER),
#endif
#ifdef HAVE_DSHOW
DECLARE_BACKEND(CAP_DSHOW, "DSHOW", MODE_CAPTURE_BY_INDEX),
#endif
#ifdef HAVE_VFW
DECLARE_BACKEND(CAP_VFW, "VFW", MODE_CAPTURE_ALL | MODE_WRITER),
#endif
// Linux, some Unix
#if defined HAVE_CAMV4L2
DECLARE_BACKEND(CAP_V4L2, "V4L2", MODE_CAPTURE_ALL),
#elif defined HAVE_LIBV4L || defined HAVE_CAMV4L
DECLARE_BACKEND(CAP_V4L, "V4L", MODE_CAPTURE_ALL),
#endif
// RGB-D universal
#ifdef HAVE_OPENNI
DECLARE_BACKEND(CAP_OPENNI, "OPENNI", MODE_CAPTURE_ALL),
#endif
#ifdef HAVE_OPENNI2
DECLARE_BACKEND(CAP_OPENNI2, "OPENNI2", MODE_CAPTURE_ALL),
#endif
#ifdef HAVE_INTELPERC
DECLARE_BACKEND(CAP_INTELPERC, "INTEL_PERC", MODE_CAPTURE_BY_INDEX),
#endif
// OpenCV file-based only
DECLARE_BACKEND(CAP_IMAGES, "CV_IMAGES", MODE_CAPTURE_BY_FILENAME | MODE_WRITER),
DECLARE_BACKEND(CAP_OPENCV_MJPEG, "CV_MJPEG", MODE_CAPTURE_BY_FILENAME | MODE_WRITER),
// special interfaces / stereo cameras / other SDKs
#if defined(HAVE_DC1394_2) || defined(HAVE_DC1394) || defined(HAVE_CMU1394)
DECLARE_BACKEND(CAP_FIREWIRE, "FIREWIRE", MODE_CAPTURE_BY_INDEX),
#endif
// GigE
#ifdef HAVE_PVAPI
DECLARE_BACKEND(CAP_PVAPI, "PVAPI", MODE_CAPTURE_BY_INDEX),
#endif
#ifdef HAVE_XIMEA
DECLARE_BACKEND(CAP_XIAPI, "XIMEA", MODE_CAPTURE_ALL),
#endif
#ifdef HAVE_GIGE_API
DECLARE_BACKEND(CAP_GIGANETIX, "GIGANETIX", MODE_CAPTURE_BY_INDEX),
#endif
#ifdef HAVE_ARAVIS_API
DECLARE_BACKEND(CAP_ARAVIS, "ARAVIS", MODE_CAPTURE_BY_INDEX),
#endif
#ifdef HAVE_UNICAP
DECLARE_BACKEND(CAP_UNICAP, "UNICAP", MODE_CAPTURE_BY_INDEX),
#endif
#ifdef HAVE_GPHOTO2
DECLARE_BACKEND(CAP_GPHOTO2, "GPHOTO2", MODE_CAPTURE_ALL),
#endif
#ifdef HAVE_XINE
DECLARE_BACKEND(CAP_XINE, "XINE", MODE_CAPTURE_BY_FILENAME),
#endif
// dropped backends: MIL, TYZX, Android
};
bool sortByPriority(const VideoBackendInfo &lhs, const VideoBackendInfo &rhs)
{
return lhs.priority > rhs.priority;
}
/** @brief Manages list of enabled backends
*/
class VideoBackendRegistry
{
protected:
std::vector<VideoBackendInfo> enabledBackends;
VideoBackendRegistry()
{
const int N = sizeof(builtin_backends)/sizeof(builtin_backends[0]);
enabledBackends.assign(builtin_backends, builtin_backends + N);
for (int i = 0; i < N; i++)
{
VideoBackendInfo& info = enabledBackends[i];
info.priority = 1000 - i * 10;
}
CV_LOG_DEBUG(NULL, "VIDEOIO: Builtin backends(" << N << "): " << dumpBackends());
if (readPrioritySettings())
{
CV_LOG_INFO(NULL, "VIDEOIO: Updated backends priorities: " << dumpBackends());
}
int enabled = 0;
for (int i = 0; i < N; i++)
{
VideoBackendInfo& info = enabledBackends[enabled];
if (enabled != i)
info = enabledBackends[i];
size_t param_priority = utils::getConfigurationParameterSizeT(cv::format("OPENCV_VIDEOIO_PRIORITY_%s", info.name).c_str(), (size_t)info.priority);
CV_Assert(param_priority == (size_t)(int)param_priority); // overflow check
if (param_priority > 0)
{
info.priority = (int)param_priority;
enabled++;
}
else
{
CV_LOG_INFO(NULL, "VIDEOIO: Disable backend: " << info.name);
}
}
enabledBackends.resize(enabled);
CV_LOG_DEBUG(NULL, "VIDEOIO: Available backends(" << enabled << "): " << dumpBackends());
std::sort(enabledBackends.begin(), enabledBackends.end(), sortByPriority);
CV_LOG_INFO(NULL, "VIDEOIO: Enabled backends(" << enabled << ", sorted by priority): " << dumpBackends());
}
static std::vector<std::string> tokenize_string(const std::string& input, char token)
{
std::vector<std::string> result;
std::string::size_type prev_pos = 0, pos = 0;
while((pos = input.find(token, pos)) != std::string::npos)
{
result.push_back(input.substr(prev_pos, pos-prev_pos));
prev_pos = ++pos;
}
result.push_back(input.substr(prev_pos));
return result;
}
bool readPrioritySettings()
{
bool hasChanges = false;
cv::String prioritized_backends = utils::getConfigurationParameterString("OPENCV_VIDEOIO_PRIORITY_LIST", NULL);
if (prioritized_backends.empty())
return hasChanges;
CV_LOG_INFO(NULL, "VIDEOIO: Configured priority list (OPENCV_VIDEOIO_PRIORITY_LIST): " << prioritized_backends);
const std::vector<std::string> names = tokenize_string(prioritized_backends, ',');
for (size_t i = 0; i < names.size(); i++)
{
const std::string& name = names[i];
bool found = false;
for (size_t k = 0; k < enabledBackends.size(); k++)
{
VideoBackendInfo& info = enabledBackends[k];
if (name == info.name)
{
info.priority = (int)(100000 + (names.size() - i) * 1000);
CV_LOG_DEBUG(NULL, "VIDEOIO: New backend priority: '" << name << "' => " << info.priority);
found = true;
hasChanges = true;
break;
}
}
if (!found)
{
CV_LOG_WARNING(NULL, "VIDEOIO: Can't prioritize unknown/unavailable backend: '" << name << "'");
}
}
return hasChanges;
}
public:
std::string dumpBackends() const
{
std::ostringstream os;
for (size_t i = 0; i < enabledBackends.size(); i++)
{
if (i > 0) os << "; ";
const VideoBackendInfo& info = enabledBackends[i];
os << info.name << '(' << info.priority << ')';
}
return os.str();
}
static VideoBackendRegistry& getInstance()
{
static VideoBackendRegistry g_instance;
return g_instance;
}
inline std::vector<VideoBackendInfo> getEnabledBackends() const { return enabledBackends; }
inline std::vector<VideoBackendInfo> getAvailableBackends_CaptureByIndex() const
{
std::vector<VideoBackendInfo> result;
for (size_t i = 0; i < enabledBackends.size(); i++)
{
const VideoBackendInfo& info = enabledBackends[i];
if (info.mode & MODE_CAPTURE_BY_INDEX)
result.push_back(info);
}
return result;
}
inline std::vector<VideoBackendInfo> getAvailableBackends_CaptureByFilename() const
{
std::vector<VideoBackendInfo> result;
for (size_t i = 0; i < enabledBackends.size(); i++)
{
const VideoBackendInfo& info = enabledBackends[i];
if (info.mode & MODE_CAPTURE_BY_FILENAME)
result.push_back(info);
}
return result;
}
inline std::vector<VideoBackendInfo> getAvailableBackends_Writer() const
{
std::vector<VideoBackendInfo> result;
for (size_t i = 0; i < enabledBackends.size(); i++)
{
const VideoBackendInfo& info = enabledBackends[i];
if (info.mode & MODE_WRITER)
result.push_back(info);
}
return result;
}
};
} // namespace
namespace videoio_registry {
std::vector<VideoBackendInfo> getAvailableBackends_CaptureByIndex()
{
const std::vector<VideoBackendInfo> result = VideoBackendRegistry::getInstance().getAvailableBackends_CaptureByIndex();
return result;
}
std::vector<VideoBackendInfo> getAvailableBackends_CaptureByFilename()
{
const std::vector<VideoBackendInfo> result = VideoBackendRegistry::getInstance().getAvailableBackends_CaptureByFilename();
return result;
}
std::vector<VideoBackendInfo> getAvailableBackends_Writer()
{
const std::vector<VideoBackendInfo> result = VideoBackendRegistry::getInstance().getAvailableBackends_Writer();
return result;
}
cv::String getBackendName(VideoCaptureAPIs api)
{
if (api == CAP_ANY)
return "CAP_ANY"; // special case, not a part of backends list
const int N = sizeof(builtin_backends)/sizeof(builtin_backends[0]);
for (size_t i = 0; i < N; i++)
{
const VideoBackendInfo& backend = builtin_backends[i];
if (backend.id == api)
return backend.name;
}
return cv::format("UnknownVideoAPI(%d)", (int)api);
}
std::vector<VideoCaptureAPIs> getBackends()
{
std::vector<VideoBackendInfo> backends = VideoBackendRegistry::getInstance().getEnabledBackends();
std::vector<VideoCaptureAPIs> result;
for (size_t i = 0; i < backends.size(); i++)
result.push_back((VideoCaptureAPIs)backends[i].id);
return result;
}
std::vector<VideoCaptureAPIs> getCameraBackends()
{
const std::vector<VideoBackendInfo> backends = VideoBackendRegistry::getInstance().getAvailableBackends_CaptureByIndex();
std::vector<VideoCaptureAPIs> result;
for (size_t i = 0; i < backends.size(); i++)
result.push_back((VideoCaptureAPIs)backends[i].id);
return result;
}
std::vector<VideoCaptureAPIs> getStreamBackends()
{
const std::vector<VideoBackendInfo> backends = VideoBackendRegistry::getInstance().getAvailableBackends_CaptureByFilename();
std::vector<VideoCaptureAPIs> result;
for (size_t i = 0; i < backends.size(); i++)
result.push_back((VideoCaptureAPIs)backends[i].id);
return result;
}
std::vector<VideoCaptureAPIs> getWriterBackends()
{
const std::vector<VideoBackendInfo> backends = VideoBackendRegistry::getInstance().getAvailableBackends_Writer();
std::vector<VideoCaptureAPIs> result;
for (size_t i = 0; i < backends.size(); i++)
result.push_back((VideoCaptureAPIs)backends[i].id);
return result;
}
} // namespace registry
#define TRY_OPEN(backend_func) \
{ \
try { \
if (param_VIDEOIO_DEBUG || param_VIDEOCAPTURE_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): trying ...\n", #backend_func)); \
icap = backend_func; \
if (param_VIDEOIO_DEBUG ||param_VIDEOCAPTURE_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): result=%p isOpened=%d ...\n", \
#backend_func, icap.empty() ? NULL : icap.get(), icap.empty() ? -1: icap->isOpened())); \
} catch(const cv::Exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised OpenCV exception:\n\n%s\n", #backend_func, e.what())); \
} catch (const std::exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised C++ exception:\n\n%s\n", #backend_func, e.what())); \
} catch(...) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised unknown C++ exception!\n\n", #backend_func)); \
} \
break; \
}
#define TRY_OPEN_LEGACY(backend_func) \
{ \
try { \
if (param_VIDEOIO_DEBUG || param_VIDEOCAPTURE_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): trying ...\n", #backend_func)); \
capture = backend_func; \
if (param_VIDEOIO_DEBUG || param_VIDEOCAPTURE_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): result=%p ...\n", #backend_func, capture)); \
} catch(const cv::Exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised OpenCV exception:\n\n%s\n", #backend_func, e.what())); \
} catch (const std::exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised C++ exception:\n\n%s\n", #backend_func, e.what())); \
} catch(...) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised unknown C++ exception!\n\n", #backend_func)); \
} \
break; \
}
void VideoCapture_create(CvCapture*& capture, Ptr<IVideoCapture>& icap, VideoCaptureAPIs api, int index)
{
CV_UNUSED(capture); CV_UNUSED(icap);
switch (api)
{
default:
CV_LOG_WARNING(NULL, "VideoCapture(index=" << index << ") was built without support of requested backendID=" << (int)api);
break;
#ifdef HAVE_GSTREAMER
case CAP_GSTREAMER:
TRY_OPEN(createGStreamerCapture(index));
break;
#endif
#ifdef HAVE_MSMF
case CAP_MSMF:
TRY_OPEN(cvCreateCapture_MSMF(index));
break;
#endif
#ifdef HAVE_DSHOW
case CAP_DSHOW:
TRY_OPEN(makePtr<VideoCapture_DShow>(index));
break;
#endif
#ifdef HAVE_INTELPERC
case CAP_INTELPERC:
TRY_OPEN(makePtr<VideoCapture_IntelPerC>());
break;
#endif
#ifdef WINRT_VIDEO
case CAP_WINRT:
TRY_OPEN(makePtr<cv::VideoCapture_WinRT>(index));
break;
#endif
#ifdef HAVE_GPHOTO2
case CAP_GPHOTO2:
TRY_OPEN(createGPhoto2Capture(index));
break;
#endif
case CAP_VFW: // or CAP_V4L or CAP_V4L2
#ifdef HAVE_VFW
TRY_OPEN_LEGACY(cvCreateCameraCapture_VFW(index))
#endif
#if defined HAVE_LIBV4L || defined HAVE_CAMV4L || defined HAVE_CAMV4L2 || defined HAVE_VIDEOIO
TRY_OPEN_LEGACY(cvCreateCameraCapture_V4L(index))
#endif
break;
case CAP_FIREWIRE:
#ifdef HAVE_DC1394_2
TRY_OPEN_LEGACY(cvCreateCameraCapture_DC1394_2(index))
#endif
#ifdef HAVE_DC1394
TRY_OPEN_LEGACY(cvCreateCameraCapture_DC1394(index))
#endif
#ifdef HAVE_CMU1394
TRY_OPEN_LEGACY(cvCreateCameraCapture_CMU(index))
#endif
break; // CAP_FIREWIRE
#ifdef HAVE_MIL
case CAP_MIL:
TRY_OPEN_LEGACY(cvCreateCameraCapture_MIL(index))
break;
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
case CAP_QT:
TRY_OPEN_LEGACY(cvCreateCameraCapture_QT(index))
break;
#endif
#ifdef HAVE_UNICAP
case CAP_UNICAP:
TRY_OPEN_LEGACY(cvCreateCameraCapture_Unicap(index))
break;
#endif
#ifdef HAVE_PVAPI
case CAP_PVAPI:
TRY_OPEN_LEGACY(cvCreateCameraCapture_PvAPI(index))
break;
#endif
#ifdef HAVE_OPENNI
case CAP_OPENNI:
TRY_OPEN_LEGACY(cvCreateCameraCapture_OpenNI(index))
break;
#endif
#ifdef HAVE_OPENNI2
case CAP_OPENNI2:
TRY_OPEN_LEGACY(cvCreateCameraCapture_OpenNI2(index))
break;
#endif
#ifdef HAVE_XIMEA
case CAP_XIAPI:
TRY_OPEN_LEGACY(cvCreateCameraCapture_XIMEA(index))
break;
#endif
#ifdef HAVE_AVFOUNDATION
case CAP_AVFOUNDATION:
TRY_OPEN_LEGACY(cvCreateCameraCapture_AVFoundation(index))
break;
#endif
#ifdef HAVE_GIGE_API
case CAP_GIGANETIX:
TRY_OPEN_LEGACY(cvCreateCameraCapture_Giganetix(index))
break;
#endif
#ifdef HAVE_ARAVIS_API
case CAP_ARAVIS:
TRY_OPEN_LEGACY(cvCreateCameraCapture_Aravis(index))
break;
#endif
} // switch (api)
}
void VideoCapture_create(CvCapture*& capture, Ptr<IVideoCapture>& icap, VideoCaptureAPIs api, const cv::String& filename)
{
switch (api)
{
default:
CV_LOG_WARNING(NULL, "VideoCapture(filename=" << filename << ") was built without support of requested backendID=" << (int)api);
break;
#if defined HAVE_LIBV4L || defined HAVE_CAMV4L || defined HAVE_CAMV4L2 || defined HAVE_VIDEOIO
case CAP_V4L:
TRY_OPEN_LEGACY(cvCreateCameraCapture_V4L(filename.c_str()))
break;
#endif
#ifdef HAVE_VFW
case CAP_VFW:
TRY_OPEN_LEGACY(cvCreateFileCapture_VFW(filename.c_str()))
break;
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
case CAP_QT:
TRY_OPEN_LEGACY(cvCreateFileCapture_QT(filename.c_str()))
break;
#endif
#ifdef HAVE_AVFOUNDATION
case CAP_AVFOUNDATION:
TRY_OPEN_LEGACY(cvCreateFileCapture_AVFoundation(filename.c_str()))
break;
#endif
#ifdef HAVE_OPENNI
case CAP_OPENNI:
TRY_OPEN_LEGACY(cvCreateFileCapture_OpenNI(filename.c_str()))
break;
#endif
#ifdef HAVE_OPENNI2
case CAP_OPENNI2:
TRY_OPEN_LEGACY(cvCreateFileCapture_OpenNI2(filename.c_str()))
break;
#endif
#ifdef HAVE_XIMEA
case CAP_XIAPI:
TRY_OPEN_LEGACY(cvCreateCameraCapture_XIMEA(filename.c_str()))
break;
#endif
case CAP_IMAGES:
TRY_OPEN_LEGACY(cvCreateFileCapture_Images(filename.c_str()))
break;
#ifdef HAVE_FFMPEG
case CAP_FFMPEG:
TRY_OPEN(cvCreateFileCapture_FFMPEG_proxy(filename))
break;
#endif
#ifdef HAVE_GSTREAMER
case CAP_GSTREAMER:
TRY_OPEN(createGStreamerCapture(filename))
break;
#endif
#ifdef HAVE_XINE
case CAP_XINE:
TRY_OPEN(createXINECapture(filename.c_str()))
break;
#endif
#ifdef HAVE_MSMF
case CAP_MSMF:
TRY_OPEN(cvCreateCapture_MSMF(filename))
break;
#endif
#ifdef HAVE_GPHOTO2
case CAP_GPHOTO2:
TRY_OPEN(createGPhoto2Capture(filename))
break;
#endif
#ifdef HAVE_MFX
case CAP_INTEL_MFX:
TRY_OPEN(makePtr<VideoCapture_IntelMFX>(filename))
break;
#endif
case CAP_OPENCV_MJPEG:
TRY_OPEN(createMotionJpegCapture(filename))
break;
} // switch
}
void VideoWriter_create(CvVideoWriter*& writer, Ptr<IVideoWriter>& iwriter, VideoCaptureAPIs api,
const String& filename, int fourcc, double fps, const Size& frameSize, bool isColor)
{
#define CREATE_WRITER(backend_func) \
{ \
try { \
if (param_VIDEOIO_DEBUG || param_VIDEOWRITER_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): trying ...\n", #backend_func)); \
iwriter = backend_func; \
if (param_VIDEOIO_DEBUG || param_VIDEOWRITER_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): result=%p isOpened=%d...\n", #backend_func, iwriter.empty() ? NULL : iwriter.get(), iwriter.empty() ? iwriter->isOpened() : -1)); \
} catch(const cv::Exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised OpenCV exception:\n\n%s\n", #backend_func, e.what())); \
} catch (const std::exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised C++ exception:\n\n%s\n", #backend_func, e.what())); \
} catch(...) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised unknown C++ exception!\n\n", #backend_func)); \
} \
break; \
}
#define CREATE_WRITER_LEGACY(backend_func) \
{ \
try { \
if (param_VIDEOIO_DEBUG || param_VIDEOWRITER_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): trying ...\n", #backend_func)); \
writer = backend_func; \
if (param_VIDEOIO_DEBUG || param_VIDEOWRITER_DEBUG) \
CV_LOG_WARNING(NULL, cv::format("VIDEOIO(%s): result=%p...\n", #backend_func, writer)); \
} catch(const cv::Exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised OpenCV exception:\n\n%s\n", #backend_func, e.what())); \
} catch (const std::exception& e) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised C++ exception:\n\n%s\n", #backend_func, e.what())); \
} catch(...) { \
CV_LOG_ERROR(NULL, cv::format("VIDEOIO(%s): raised unknown C++ exception!\n\n", #backend_func)); \
} \
break; \
}
switch (api)
{
default:
CV_LOG_ERROR(NULL, "Unknown VideoWriter backend (check getBuildInformation()): " << (int)api);
break;
#ifdef HAVE_FFMPEG
case CAP_FFMPEG:
CREATE_WRITER(cvCreateVideoWriter_FFMPEG_proxy(filename, fourcc, fps, frameSize, isColor));
break;
#endif
#ifdef HAVE_MSMF
case CAP_MSMF:
CREATE_WRITER(cvCreateVideoWriter_MSMF(filename, fourcc, fps, frameSize, isColor));
break;
#endif
#ifdef HAVE_MFX
case CAP_INTEL_MFX:
CREATE_WRITER(VideoWriter_IntelMFX::create(filename, fourcc, fps, frameSize, isColor));
break;
#endif
#ifdef HAVE_VFW
case CAP_VFW:
CREATE_WRITER_LEGACY(cvCreateVideoWriter_VFW(filename.c_str(), fourcc, fps, cvSize(frameSize), isColor))
break;
#endif
#ifdef HAVE_AVFOUNDATION
case CAP_AVFOUNDATION:
CREATE_WRITER_LEGACY(cvCreateVideoWriter_AVFoundation(filename.c_str(), fourcc, fps, cvSize(frameSize), isColor))
break;
#endif
#if defined(HAVE_QUICKTIME) || defined(HAVE_QTKIT)
case(CAP_QT):
CREATE_WRITER_LEGACY(cvCreateVideoWriter_QT(filename.c_str(), fourcc, fps, cvSize(frameSize), isColor))
break;
#endif
#ifdef HAVE_GSTREAMER
case CAP_GSTREAMER:
CREATE_WRITER_LEGACY(cvCreateVideoWriter_GStreamer (filename.c_str(), fourcc, fps, cvSize(frameSize), isColor))
break;
#endif
case CAP_OPENCV_MJPEG:
CREATE_WRITER(createMotionJpegWriter(filename, fourcc, fps, frameSize, isColor));
break;
case CAP_IMAGES:
if(!fourcc || !fps)
{
CREATE_WRITER_LEGACY(cvCreateVideoWriter_Images(filename.c_str()));
}
break;
} // switch(api)
}
} // namespace