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cap_gstreamer.cpp
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cap_gstreamer.cpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// Intel License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2008, 2011, Nils Hasler, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
/*!
* \file cap_gstreamer.cpp
* \author Nils Hasler <hasler@mpi-inf.mpg.de>
* Max-Planck-Institut Informatik
* \author Dirk Van Haerenborgh <vhdirk@gmail.com>
*
* \brief Use GStreamer to read/write video
*/
#include "precomp.hpp"
#include <opencv2/core/utils/logger.hpp>
#include <opencv2/core/utils/filesystem.hpp>
#include <iostream>
#include <string.h>
#include <thread>
#include <queue>
#include <deque>
#include <cstddef>
#include <gst/gst.h>
#include <gst/gstbuffer.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <gst/app/gstappsink.h>
#include <gst/app/gstappsrc.h>
#include <gst/riff/riff-media.h>
#include <gst/pbutils/missing-plugins.h>
#define VERSION_NUM(major, minor, micro) (major * 1000000 + minor * 1000 + micro)
#define FULL_GST_VERSION VERSION_NUM(GST_VERSION_MAJOR, GST_VERSION_MINOR, GST_VERSION_MICRO)
#include <gst/pbutils/encoding-profile.h>
//#include <gst/base/gsttypefindhelper.h>
#define CV_WARN(...) CV_LOG_WARNING(NULL, "OpenCV | GStreamer warning: " << __VA_ARGS__)
#define COLOR_ELEM "videoconvert"
#define COLOR_ELEM_NAME COLOR_ELEM
#define CV_GST_FORMAT(format) (format)
#define GSTREAMER_INTERRUPT_OPEN_DEFAULT_TIMEOUT_NS (30 * GST_SECOND)
#define GSTREAMER_INTERRUPT_READ_DEFAULT_TIMEOUT_NS (30 * GST_SECOND)
namespace cv {
static void toFraction(double decimal, CV_OUT int& numerator, CV_OUT int& denominator);
static void handleMessage(GstElement * pipeline);
namespace {
#if defined __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wunused-function"
#endif
template<typename T> static inline void GSafePtr_addref(T* ptr)
{
if (ptr)
g_object_ref_sink(ptr);
}
template<typename T> static inline void GSafePtr_release(T** pPtr);
template<> inline void GSafePtr_release<GError>(GError** pPtr) { g_clear_error(pPtr); }
template<> inline void GSafePtr_release<GstElement>(GstElement** pPtr) { if (pPtr) { gst_object_unref(G_OBJECT(*pPtr)); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstElementFactory>(GstElementFactory** pPtr) { if (pPtr) { gst_object_unref(G_OBJECT(*pPtr)); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstPad>(GstPad** pPtr) { if (pPtr) { gst_object_unref(G_OBJECT(*pPtr)); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstCaps>(GstCaps** pPtr) { if (pPtr) { gst_caps_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstBuffer>(GstBuffer** pPtr) { if (pPtr) { gst_buffer_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstSample>(GstSample** pPtr) { if (pPtr) { gst_sample_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstBus>(GstBus** pPtr) { if (pPtr) { gst_object_unref(G_OBJECT(*pPtr)); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstMessage>(GstMessage** pPtr) { if (pPtr) { gst_message_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstQuery>(GstQuery** pPtr) { if (pPtr) { gst_query_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GMainLoop>(GMainLoop** pPtr) { if (pPtr) { g_main_loop_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstEncodingVideoProfile>(GstEncodingVideoProfile** pPtr) { if (pPtr) { gst_encoding_profile_unref(*pPtr); *pPtr = NULL; } }
template<> inline void GSafePtr_release<GstEncodingContainerProfile>(GstEncodingContainerProfile** pPtr) { if (pPtr) { gst_object_unref(G_OBJECT(*pPtr)); *pPtr = NULL; } }
template<> inline void GSafePtr_addref<char>(char* pPtr); // declaration only. not defined. should not be used
template<> inline void GSafePtr_release<char>(char** pPtr) { if (pPtr) { g_free(*pPtr); *pPtr = NULL; } }
#if defined __clang__
# pragma clang diagnostic pop
#endif
template <typename T>
class GSafePtr
{
protected:
T* ptr;
public:
inline GSafePtr() CV_NOEXCEPT : ptr(NULL) { }
inline GSafePtr(T* p) : ptr(p) { }
inline ~GSafePtr() CV_NOEXCEPT { release(); }
inline void release() CV_NOEXCEPT
{
#if 0
printf("release: %s:%d: %p\n", CV__TRACE_FUNCTION, __LINE__, ptr);
if (ptr) {
printf(" refcount: %d\n", (int)GST_OBJECT_REFCOUNT_VALUE(ptr)); \
}
#endif
if (ptr)
GSafePtr_release<T>(&ptr);
}
inline operator T* () CV_NOEXCEPT { return ptr; }
inline operator /*const*/ T* () const CV_NOEXCEPT { return (T*)ptr; } // there is no const correctness in Gst C API
T* get() { CV_Assert(ptr); return ptr; }
/*const*/ T* get() const { CV_Assert(ptr); return (T*)ptr; } // there is no const correctness in Gst C API
const T* operator -> () const { CV_Assert(ptr); return ptr; }
inline operator bool () const CV_NOEXCEPT { return ptr != NULL; }
inline bool operator ! () const CV_NOEXCEPT { return ptr == NULL; }
T** getRef() { CV_Assert(ptr == NULL); return &ptr; }
inline GSafePtr& reset(T* p) CV_NOEXCEPT // pass result of functions with "transfer floating" ownership
{
//printf("reset: %s:%d: %p\n", CV__TRACE_FUNCTION, __LINE__, p);
release();
if (p)
{
GSafePtr_addref<T>(p);
ptr = p;
}
return *this;
}
inline GSafePtr& attach(T* p) CV_NOEXCEPT // pass result of functions with "transfer full" ownership
{
//printf("attach: %s:%d: %p\n", CV__TRACE_FUNCTION, __LINE__, p);
release(); ptr = p; return *this;
}
inline T* detach() CV_NOEXCEPT { T* p = ptr; ptr = NULL; return p; }
inline void swap(GSafePtr& o) CV_NOEXCEPT { std::swap(ptr, o.ptr); }
private:
GSafePtr(const GSafePtr&); // = disabled
GSafePtr& operator=(const T*); // = disabled
};
class ScopeGuardGstMapInfo
{
GstBuffer* buf_;
GstMapInfo* info_;
public:
ScopeGuardGstMapInfo(GstBuffer* buf, GstMapInfo* info)
: buf_(buf), info_(info)
{}
~ScopeGuardGstMapInfo()
{
gst_buffer_unmap(buf_, info_);
}
};
class ScopeGuardGstVideoFrame
{
GstVideoFrame* frame_;
public:
ScopeGuardGstVideoFrame(GstVideoFrame* frame)
: frame_(frame)
{}
~ScopeGuardGstVideoFrame()
{
gst_video_frame_unmap(frame_);
}
};
} // namespace
/*!
* \brief The gst_initializer class
* Initializes gstreamer once in the whole process
*/
class gst_initializer
{
public:
static gst_initializer& init()
{
static gst_initializer g_init;
if (g_init.isFailed)
CV_Error(Error::StsError, "Can't initialize GStreamer");
return g_init;
}
private:
bool isFailed;
bool call_deinit;
bool start_loop;
GSafePtr<GMainLoop> loop;
std::thread thread;
gst_initializer() :
isFailed(false)
{
call_deinit = utils::getConfigurationParameterBool("OPENCV_VIDEOIO_GSTREAMER_CALL_DEINIT", false);
start_loop = utils::getConfigurationParameterBool("OPENCV_VIDEOIO_GSTREAMER_START_MAINLOOP", false);
GSafePtr<GError> err;
gboolean gst_init_res = gst_init_check(NULL, NULL, err.getRef());
if (!gst_init_res)
{
CV_WARN("Can't initialize GStreamer: " << (err ? err->message : "<unknown reason>"));
isFailed = true;
return;
}
guint major, minor, micro, nano;
gst_version(&major, &minor, µ, &nano);
if (GST_VERSION_MAJOR != major)
{
CV_WARN("incompatible GStreamer version");
isFailed = true;
return;
}
if (start_loop)
{
loop.attach(g_main_loop_new (NULL, FALSE));
thread = std::thread([this](){
g_main_loop_run (loop);
});
}
}
~gst_initializer()
{
if (call_deinit)
{
// Debug leaks: GST_LEAKS_TRACER_STACK_TRACE=1 GST_DEBUG="GST_TRACER:7" GST_TRACERS="leaks"
gst_deinit();
}
if (start_loop)
{
g_main_loop_quit(loop);
thread.join();
}
}
};
inline static
std::string get_gst_propname(int propId)
{
switch (propId)
{
case CV_CAP_PROP_BRIGHTNESS: return "brightness";
case CV_CAP_PROP_CONTRAST: return "contrast";
case CV_CAP_PROP_SATURATION: return "saturation";
case CV_CAP_PROP_HUE: return "hue";
default: return std::string();
}
}
inline static
bool is_gst_element_exists(const std::string& name)
{
GSafePtr<GstElementFactory> testfac; testfac.attach(gst_element_factory_find(name.c_str()));
return (bool)testfac;
}
static void find_hw_element(const GValue *item, gpointer va_type)
{
GstElement *element = GST_ELEMENT(g_value_get_object(item));
const gchar *name = g_type_name(G_OBJECT_TYPE(element));
if (name) {
std::string name_lower = toLowerCase(name);
if (name_lower.find("vaapi") != std::string::npos) {
*(int*)va_type = VIDEO_ACCELERATION_VAAPI;
} else if (name_lower.find("mfx") != std::string::npos || name_lower.find("msdk") != std::string::npos) {
*(int*)va_type = VIDEO_ACCELERATION_MFX;
} else if (name_lower.find("d3d11") != std::string::npos) {
*(int*)va_type = VIDEO_ACCELERATION_D3D11;
}
}
}
//==================================================================================================
class GStreamerCapture CV_FINAL : public IVideoCapture
{
private:
GSafePtr<GstElement> audiopipeline;
GSafePtr<GstElement> pipeline;
GSafePtr<GstElement> v4l2src;
GSafePtr<GstElement> sink;
GSafePtr<GstElement> audiosink;
GSafePtr<GstSample> impendingVideoSample;
GSafePtr<GstSample> usedVideoSample;
GSafePtr<GstSample> audioSample;
GSafePtr<GstCaps> caps;
GSafePtr<GstCaps> audiocaps;
gint64 bufferedAudioDurationNS;
gint64 requiredAudioTimeNS;
gint64 impendingVideoSampleTimeNS;
gint64 usedVideoSampleTimeNS;
gint64 videoSampleDurationNS;
gint64 audioSampleDurationNS;
gint64 audioSampleTimeNS;
gint64 chunkLengthOfBytes;
gint64 givenAudioTimeNS;
gint64 numberOfAdditionalAudioBytes;
gint64 audioSamplePosInSamples;
gint videoStream;
gint audioStream;
gint64 duration;
gint width;
gint height;
double fps;
GstClockTime openTimeout; // measured in nanoseconds
GstClockTime readTimeout; // measured in nanoseconds
bool isPosFramesSupported;
bool isPosFramesEmulated;
bool vEOS;
bool aEOS;
bool syncLastFrame;
bool lastFrame;
gint64 emulatedFrameNumber;
gint outputAudioFormat;
gint audioBitPerSample;
gint audioBaseIndex;
gint nAudioChannels;
gint audioSamplesPerSecond;
gint audioBitPerFrame;
gint audioSampleSize;
std::string audioFormat;
guint64 timestamp;
Mat audioFrame;
std::deque<uint8_t> bufferAudioData;
VideoAccelerationType va_type;
int hw_device;
public:
GStreamerCapture();
virtual ~GStreamerCapture() CV_OVERRIDE;
virtual bool grabFrame() CV_OVERRIDE;
virtual bool retrieveFrame(int /*unused*/, OutputArray dst) CV_OVERRIDE;
bool configureAudioFrame();
bool grabVideoFrame();
bool grabAudioFrame();
bool retrieveVideoFrame(int /*unused*/, OutputArray dst);
bool retrieveAudioFrame(int /*unused*/, OutputArray dst);
virtual double getProperty(int propId) const CV_OVERRIDE;
virtual bool setProperty(int propId, double value) CV_OVERRIDE;
virtual bool isOpened() const CV_OVERRIDE { return (bool)pipeline; }
virtual int getCaptureDomain() CV_OVERRIDE { return cv::CAP_GSTREAMER; }
bool open(int id, const cv::VideoCaptureParameters& params);
bool open(const String &filename_, const cv::VideoCaptureParameters& params);
static void newPad(GstElement * /*elem*/, GstPad *pad, gpointer data);
bool configureHW(const cv::VideoCaptureParameters&);
bool configureStreamsProperty(const cv::VideoCaptureParameters&);
bool setAudioProperties(const cv::VideoCaptureParameters&);
protected:
bool isPipelinePlaying();
void startPipeline();
void stopPipeline();
void restartPipeline();
void setFilter(const char *prop, int type, int v1, int v2);
void removeFilter(const char *filter);
};
GStreamerCapture::GStreamerCapture() :
bufferedAudioDurationNS(0),
requiredAudioTimeNS(0),
impendingVideoSampleTimeNS(0),
usedVideoSampleTimeNS(0),
videoSampleDurationNS(0), audioSampleDurationNS(0),
audioSampleTimeNS(0),
chunkLengthOfBytes(0),
givenAudioTimeNS(0),
numberOfAdditionalAudioBytes(0),
audioSamplePosInSamples(0),
videoStream(0),
audioStream(-1),
duration(-1), width(-1), height(-1), fps(-1),
openTimeout(GSTREAMER_INTERRUPT_OPEN_DEFAULT_TIMEOUT_NS),
readTimeout(GSTREAMER_INTERRUPT_READ_DEFAULT_TIMEOUT_NS),
isPosFramesSupported(false),
isPosFramesEmulated(false),
vEOS(false),
aEOS(false),
syncLastFrame(true),
lastFrame(false),
emulatedFrameNumber(-1),
outputAudioFormat(CV_16S),
audioBitPerSample(16),
audioBaseIndex(1),
nAudioChannels(0),
audioSamplesPerSecond(44100),
audioBitPerFrame(0),
audioSampleSize(0),
audioFormat("S16LE"),
timestamp(0)
, va_type(VIDEO_ACCELERATION_NONE)
, hw_device(-1)
{}
/*!
* \brief CvCapture_GStreamer::close
* Closes the pipeline and destroys all instances
*/
GStreamerCapture::~GStreamerCapture()
{
if (isPipelinePlaying())
stopPipeline();
if (pipeline && GST_IS_ELEMENT(pipeline.get()))
{
gst_element_set_state(pipeline, GST_STATE_NULL);
pipeline.release();
}
}
bool GStreamerCapture::configureHW(const cv::VideoCaptureParameters& params)
{
if (params.has(CAP_PROP_HW_ACCELERATION))
{
va_type = params.get<VideoAccelerationType>(CAP_PROP_HW_ACCELERATION);
}
if (params.has(CAP_PROP_HW_DEVICE))
{
hw_device = params.get<int>(CAP_PROP_HW_DEVICE);
if (va_type == VIDEO_ACCELERATION_NONE && hw_device != -1)
{
CV_LOG_ERROR(NULL, "VIDEOIO/GStreamer: Invalid usage of CAP_PROP_HW_DEVICE without requested H/W acceleration. Bailout");
return false;
}
if (va_type == VIDEO_ACCELERATION_ANY && hw_device != -1)
{
CV_LOG_ERROR(NULL, "VIDEOIO/GStreamer: Invalid usage of CAP_PROP_HW_DEVICE with 'ANY' H/W acceleration. Bailout");
return false;
}
if (hw_device != -1)
{
CV_LOG_ERROR(NULL, "VIDEOIO/GStreamer: CAP_PROP_HW_DEVICE is not supported. Specify -1 (auto) value. Bailout");
return false;
}
}
return true;
}
bool GStreamerCapture::configureStreamsProperty(const cv::VideoCaptureParameters& params)
{
if (params.has(CAP_PROP_VIDEO_STREAM))
{
double value = params.get<double>(CAP_PROP_VIDEO_STREAM);
if (value == -1 || value == 0)
videoStream = static_cast<gint>(value);
else
{
CV_LOG_ERROR(NULL, "VIDEOIO/Gstreamer: CAP_PROP_VIDEO_STREAM parameter value is invalid/unsupported: " << value);
return false;
}
}
if (params.has(CAP_PROP_AUDIO_STREAM))
{
double value = params.get<double>(CAP_PROP_AUDIO_STREAM);
if (value == -1 || value > -1)
audioStream = static_cast<gint>(value);
else
{
CV_LOG_ERROR(NULL, "VIDEOIO/Gstreamer: CAP_PROP_AUDIO_STREAM parameter value is invalid/unsupported: " << value);
return false;
}
}
return true;
}
bool GStreamerCapture::setAudioProperties(const cv::VideoCaptureParameters& params)
{
if (params.has(CAP_PROP_AUDIO_DATA_DEPTH))
{
gint value = static_cast<gint>(params.get<double>(CAP_PROP_AUDIO_DATA_DEPTH));
if (value != CV_8S && value != CV_16S && value != CV_32S && value != CV_32F)
{
CV_LOG_ERROR(NULL, "VIDEOIO/Gstreamer: CAP_PROP_AUDIO_DATA_DEPTH parameter value is invalid/unsupported: " << value);
return false;
}
else
{
outputAudioFormat = value;
}
}
if (params.has(CAP_PROP_AUDIO_SAMPLES_PER_SECOND))
{
int value = static_cast<int>(params.get<double>(CAP_PROP_AUDIO_SAMPLES_PER_SECOND));
if (value < 0)
{
CV_LOG_ERROR(NULL, "VIDEOIO/Gstreamer: CAP_PROP_AUDIO_SAMPLES_PER_SECOND parameter can't be negative: " << value);
return false;
}
else
{
audioSamplesPerSecond = value;
}
}
if (params.has(CAP_PROP_AUDIO_SYNCHRONIZE))
{
int value = static_cast<uint32_t>(params.get<double>(CAP_PROP_AUDIO_SYNCHRONIZE));
syncLastFrame = (value != 0) ? true : false;
}
return true;
}
/*!
* \brief CvCapture_GStreamer::grabFrame
* \return
* Grabs a sample from the pipeline, awaiting consumation by retrieveFrame.
* The pipeline is started if it was not running yet
*/
bool GStreamerCapture::grabFrame()
{
if (!pipeline || !GST_IS_ELEMENT(pipeline.get()))
return false;
// start the pipeline if it was not in playing state yet
if (!this->isPipelinePlaying())
this->startPipeline();
// bail out if EOS
if (vEOS)
{
return false;
}
bool returnFlag = true;
if (videoStream >= 0)
{
if (!vEOS)
returnFlag &= grabVideoFrame();
if (!returnFlag)
{
return false;
}
}
if (audioStream >= 0)
{
bufferedAudioDurationNS = (gint64)(1e9*(((double)bufferAudioData.size()/((audioBitPerSample/8)*nAudioChannels))/audioSamplesPerSecond));
audioFrame.release();
if (!aEOS)
returnFlag &= grabAudioFrame();
}
return returnFlag;
}
bool GStreamerCapture::grabVideoFrame()
{
usedVideoSample.release();
bool returnFlag = false;
bool stopFlag = false;
if (audioStream != -1)
{
usedVideoSample.swap(impendingVideoSample);
std::swap(usedVideoSampleTimeNS, impendingVideoSampleTimeNS);
}
while (!stopFlag)
{
if (gst_app_sink_is_eos(GST_APP_SINK(sink.get())))
{
vEOS = true;
lastFrame = true;
stopFlag = true;
if (audioStream == -1)
{
returnFlag = false;
}
else if (usedVideoSample)
{
gst_element_query_position(sink.get(), CV_GST_FORMAT(GST_FORMAT_TIME), &impendingVideoSampleTimeNS);
videoSampleDurationNS = impendingVideoSampleTimeNS - usedVideoSampleTimeNS;
requiredAudioTimeNS = impendingVideoSampleTimeNS - givenAudioTimeNS;
givenAudioTimeNS += requiredAudioTimeNS;
returnFlag = true;
}
}
else
{
#if FULL_GST_VERSION >= VERSION_NUM(1,10,0)
impendingVideoSample.attach(gst_app_sink_try_pull_sample(GST_APP_SINK(sink.get()), readTimeout));
#else
impendingVideoSample.attach(gst_app_sink_pull_sample(GST_APP_SINK(sink.get())));
#endif
if (!impendingVideoSample)
{
if (!gst_app_sink_is_eos(GST_APP_SINK(sink.get())))
{
CV_LOG_DEBUG(NULL, "videoio(Gstreamer): gst_app_sink_pull_sample() method is not succeeded");
}
else
{
vEOS = true;
lastFrame = true;
stopFlag = true;
if (audioStream == -1)
{
return false;
}
else if (usedVideoSample)
{
gst_element_query_position(sink.get(), CV_GST_FORMAT(GST_FORMAT_TIME), &impendingVideoSampleTimeNS);
videoSampleDurationNS = impendingVideoSampleTimeNS - usedVideoSampleTimeNS;
requiredAudioTimeNS = impendingVideoSampleTimeNS - givenAudioTimeNS;
givenAudioTimeNS += requiredAudioTimeNS;
returnFlag = true;
}
}
}
gst_element_query_position(sink.get(), CV_GST_FORMAT(GST_FORMAT_TIME), &impendingVideoSampleTimeNS);
if (audioStream != -1)
{
if (!usedVideoSample)
{
usedVideoSample.swap(impendingVideoSample);
std::swap(usedVideoSampleTimeNS, impendingVideoSampleTimeNS);
}
else
{
stopFlag = true;
}
if (impendingVideoSample)
{
emulatedFrameNumber++;
}
videoSampleDurationNS = impendingVideoSampleTimeNS - usedVideoSampleTimeNS;
requiredAudioTimeNS = impendingVideoSampleTimeNS - givenAudioTimeNS;
givenAudioTimeNS += requiredAudioTimeNS;
}
else
{
usedVideoSample.swap(impendingVideoSample);
std::swap(usedVideoSampleTimeNS, impendingVideoSampleTimeNS);
stopFlag = true;
emulatedFrameNumber++;
}
if (usedVideoSample)
{
auto *buffer = gst_sample_get_buffer((GstSample*)usedVideoSample);
timestamp = GST_BUFFER_PTS(buffer);
}
returnFlag = true;
}
}
return returnFlag;
}
bool GStreamerCapture::grabAudioFrame()
{
audioSample.reset(NULL);
bool returnFlag = false;
gint64 audioTimeNS = bufferedAudioDurationNS;
if (bufferedAudioDurationNS > requiredAudioTimeNS)
{
return true;
}
while ((!vEOS) ? audioTimeNS <= requiredAudioTimeNS : !aEOS)
{
if (gst_app_sink_is_eos(GST_APP_SINK(audiosink.get())))
{
aEOS = true;
if (videoStream != -1 && !vEOS)
returnFlag = true;
if (videoStream == -1)
audioSamplePosInSamples += chunkLengthOfBytes/((audioBitPerSample/8)*nAudioChannels);
break;
}
else
{
audioSample.attach(gst_app_sink_pull_sample(GST_APP_SINK(audiosink.get())));
if (!audioSample)
{
if (!gst_app_sink_is_eos(GST_APP_SINK(audiosink.get())))
{
CV_LOG_ERROR(NULL, "videoio(Gstreamer): gst_app_sink_pull_sample() method is not succeeded");
return false;
}
else
{
aEOS = true;
break;
}
}
gst_element_query_position(audiosink.get(), CV_GST_FORMAT(GST_FORMAT_TIME), &audioSampleTimeNS);
GstMapInfo map_info = {};
GstCaps* frame_caps = gst_sample_get_caps(audioSample.get()); // no lifetime transfer
if (!frame_caps)
{
CV_LOG_ERROR(NULL, "GStreamer: gst_sample_get_caps() returns NULL");
return false;
}
if (!GST_CAPS_IS_SIMPLE(frame_caps))
{
// bail out in no caps
CV_LOG_ERROR(NULL, "GStreamer: GST_CAPS_IS_SIMPLE(frame_caps) check is failed");
return false;
}
GstAudioInfo info = {};
gboolean audio_info_res = gst_audio_info_from_caps(&info, frame_caps);
if (!audio_info_res)
{
CV_Error(Error::StsError, "GStreamer: gst_audio_info_from_caps() is failed. Can't handle unknown layout");
}
audioBitPerFrame = GST_AUDIO_INFO_BPF(&info);
CV_CheckGT(audioBitPerFrame, 0, "");
GstStructure* structure = gst_caps_get_structure(frame_caps, 0); // no lifetime transfer
if (!structure)
{
CV_LOG_ERROR(NULL, "GStreamer: Can't query 'structure'-0 from GStreamer sample");
return false;
}
const gchar* name_ = gst_structure_get_name(structure);
if (!name_)
{
CV_LOG_ERROR(NULL, "GStreamer: Can't query 'name' from GStreamer sample");
return false;
}
std::string name = toLowerCase(std::string(name_));
if (name != "audio/x-raw")
{
CV_Error_(Error::StsNotImplemented, ("Unsupported GStreamer layer type: %s", name.c_str()));
return false;
}
const gchar* format_ = gst_structure_get_string(structure, "format");
if (!format_)
{
CV_LOG_ERROR(NULL, "GStreamer: Can't query 'format' of 'audio/x-raw'");
return false;
}
std::string format = toUpperCase(std::string(format_));
if (format != "S8" && format != "S16LE" && format != "S32LE" && format != "F32LE")
{
CV_Error_(Error::StsNotImplemented, ("Unsupported GStreamer audio format: %s", format.c_str()));
return false;
}
if (format != audioFormat)
{
return false;
}
GstBuffer* buf = gst_sample_get_buffer(audioSample);
if (!buf)
{
CV_LOG_ERROR(NULL, "GStreamer: Failed. Buffer is empty");
return false;
}
timestamp = GST_BUFFER_PTS(buf);
if (!gst_buffer_map(buf, &map_info, GST_MAP_READ))
{
CV_LOG_ERROR(NULL, "GStreamer: Failed to map GStreamer buffer to system memory");
return false;
}
ScopeGuardGstMapInfo map_guard(buf, &map_info);
gsize lastSize = bufferAudioData.size();
audioSampleSize = map_info.size;
bufferAudioData.resize(lastSize+audioSampleSize);
for (gint j = 0; j < audioSampleSize; j++)
{
bufferAudioData[lastSize+j]=*(map_info.data + j);
}
audioSampleDurationNS = 1e9*(((double)audioSampleSize/((audioBitPerSample/8)*nAudioChannels))/audioSamplesPerSecond);
CV_LOG_DEBUG(NULL, "videoio(Gstreamer): got audio frame with timestamp=" << audioSampleTimeNS << " duration=" << audioSampleDurationNS);
audioTimeNS += (int64_t)(audioSampleDurationNS);
returnFlag = true;
}
}
returnFlag &= configureAudioFrame();
return returnFlag;
}
bool GStreamerCapture::configureAudioFrame()
{
if (bufferAudioData.empty() && aEOS)
{
return false;
}
std::vector<uint8_t> audioDataInUse;
audioSamplePosInSamples += chunkLengthOfBytes/((audioBitPerSample/8)*nAudioChannels);
chunkLengthOfBytes = (videoStream != -1) ? (int64_t)((requiredAudioTimeNS * 1e-9 * audioSamplesPerSecond*nAudioChannels*(audioBitPerSample)/8)) : audioSampleSize;
if ((videoStream != -1) && (chunkLengthOfBytes % ((int)(audioBitPerSample)/8* (int)nAudioChannels) != 0))
{
if ( (double)audioSamplePosInSamples/audioSamplesPerSecond - usedVideoSampleTimeNS * 1e-9 >= 0 )
chunkLengthOfBytes -= numberOfAdditionalAudioBytes;
numberOfAdditionalAudioBytes = ((int)(audioBitPerSample)/8* (int)nAudioChannels)
- chunkLengthOfBytes % ((int)(audioBitPerSample)/8* (int)nAudioChannels);
chunkLengthOfBytes += numberOfAdditionalAudioBytes;
}
if ((lastFrame && !syncLastFrame) || (aEOS && !vEOS))
{
chunkLengthOfBytes = bufferAudioData.size();
audioSamplePosInSamples += chunkLengthOfBytes/((audioBitPerSample/8)*nAudioChannels);
}
CV_Check((double)chunkLengthOfBytes, chunkLengthOfBytes >= INT_MIN || chunkLengthOfBytes <= INT_MAX, "GSTREAMER: The chunkLengthOfBytes is out of the allowed range");
copy(bufferAudioData.begin(), bufferAudioData.begin() + (int)chunkLengthOfBytes, std::back_inserter(audioDataInUse));
bufferAudioData.erase(bufferAudioData.begin(), bufferAudioData.begin() + (int)chunkLengthOfBytes);
cv::Mat data;
if (audioFormat == "S8")
{
Mat((int)chunkLengthOfBytes/audioBitPerFrame, nAudioChannels, CV_8S, audioDataInUse.data()).copyTo(audioFrame);
return true;
}
if (audioFormat == "S16LE")
{
Mat((int)chunkLengthOfBytes/audioBitPerFrame, nAudioChannels, CV_16S, audioDataInUse.data()).copyTo(audioFrame);
return true;
}
if (audioFormat == "S32LE")
{
Mat((int)chunkLengthOfBytes/audioBitPerFrame, nAudioChannels, CV_32S, audioDataInUse.data()).copyTo(audioFrame);
return true;
}
if (audioFormat == "F32LE")
{
Mat((int)chunkLengthOfBytes/audioBitPerFrame, nAudioChannels, CV_32F, audioDataInUse.data()).copyTo(audioFrame);
return true;
}
audioDataInUse.clear();
audioDataInUse.shrink_to_fit();
return true;
}
bool GStreamerCapture::retrieveAudioFrame(int index, OutputArray dst)
{
if (audioFrame.empty())
{
dst.release();
if (aEOS)
return true;
}
CV_Check(index, index >= audioBaseIndex && index < audioBaseIndex + nAudioChannels, "");
index -= audioBaseIndex;
CV_CheckType(outputAudioFormat,
outputAudioFormat == CV_8S ||
outputAudioFormat == CV_16S ||
outputAudioFormat == CV_32S ||
outputAudioFormat == CV_32F,
"");
dst.create(1, audioFrame.rows, outputAudioFormat);
Mat data = dst.getMat();
switch (outputAudioFormat)
{
case CV_8S:
for (int i = 0; i < audioFrame.rows; i++)
data.at<char>(i) = audioFrame.at<char>(i, index);
return true;
case CV_16S:
for (int i = 0; i < audioFrame.rows; i++)
data.at<short>(i) = audioFrame.at<short>(i, index);
return true;
case CV_32S:
for (int i = 0; i < audioFrame.rows; i++)
data.at<int>(i) = audioFrame.at<int>(i, index);
return true;
case CV_32F:
for (int i = 0; i < audioFrame.rows; i++)
data.at<float>(i) = audioFrame.at<float>(i, index);
return true;
}
dst.release();
return false;
}
bool GStreamerCapture::retrieveVideoFrame(int, OutputArray dst)
{
GstCaps* frame_caps = gst_sample_get_caps(usedVideoSample); // no lifetime transfer
if (!frame_caps)
{
CV_LOG_ERROR(NULL, "GStreamer: gst_sample_get_caps() returns NULL");
return false;
}
if (!GST_CAPS_IS_SIMPLE(frame_caps))
{
// bail out in no caps
CV_LOG_ERROR(NULL, "GStreamer: GST_CAPS_IS_SIMPLE(frame_caps) check is failed");
return false;
}
GstVideoInfo info = {};
gboolean video_info_res = gst_video_info_from_caps(&info, frame_caps);
if (!video_info_res)
{
CV_Error(Error::StsError, "GStreamer: gst_video_info_from_caps() is failed. Can't handle unknown layout");
}
// gstreamer expects us to handle the memory at this point
// so we can just wrap the raw buffer and be done with it
GstBuffer* buf = gst_sample_get_buffer(usedVideoSample); // no lifetime transfer
if (!buf)
return false;
// at this point, the gstreamer buffer may contain a video meta with special
// stride and plane locations. We __must__ consider in order to correctly parse
// the data. The gst_video_frame_map will parse the meta for us, or default to
// regular strides/offsets if no meta is present.
GstVideoFrame frame = {};
#if FULL_GST_VERSION >= VERSION_NUM(1,6,0)
GstMapFlags flags = static_cast<GstMapFlags>(GST_MAP_READ | GST_VIDEO_FRAME_MAP_FLAG_NO_REF);
#else
GstMapFlags flags = static_cast<GstMapFlags>(GST_MAP_READ);
#endif
if (!gst_video_frame_map(&frame, &info, buf, flags))
{
CV_LOG_ERROR(NULL, "GStreamer: Failed to map GStreamer buffer to system memory");
return false;
}
ScopeGuardGstVideoFrame frame_guard(&frame); // call gst_video_frame_unmap(&frame) on scope leave
int frame_width = GST_VIDEO_FRAME_COMP_WIDTH(&frame, 0);
int frame_height = GST_VIDEO_FRAME_COMP_HEIGHT(&frame, 0);
if (frame_width <= 0 || frame_height <= 0)
{
CV_LOG_ERROR(NULL, "GStreamer: Can't query frame size from GStreamer sample");
return false;
}
GstStructure* structure = gst_caps_get_structure(frame_caps, 0); // no lifetime transfer
if (!structure)
{
CV_LOG_ERROR(NULL, "GStreamer: Can't query 'structure'-0 from GStreamer sample");
return false;
}
const gchar* name_ = gst_structure_get_name(structure);
if (!name_)
{
CV_LOG_ERROR(NULL, "GStreamer: Can't query 'name' from GStreamer sample");
return false;
}
std::string name = toLowerCase(std::string(name_));
// we support these types of data: