Advanced users • libcamera frame callback

Code:

m_Camera->requestCompleted.connect( this,RequestCompleted);

Code:

void CCamSrv::RequestCompleted(libcamera::Request* request)//wtf without *userdata{    if (request->status() == libcamera::Request::RequestCancelled || !g_pHost->m_bIsRunning)    {       // vcos_semaphore_post(&g_pHost->m_semaframe);        return;    }    //CCamSrv *pCam = (CCamSrv * ) libcamera::BoundMethodMember;     vcos_mutex_lock(&g_pHost->m_FrameLatch);    const libcamera::Request::BufferMap &buffers = request->buffers();    for (libcamera::Request::BufferMap::const_iterator it = buffers.begin(); it != buffers.end(); it++)    {        libcamera::FrameBuffer* buffer = (*it).second;        const libcamera::FrameMetadata& metadata = buffer->metadata(); //metadata.sequence;  metadata.timestamp;        /*        const libcamera::ControlList& requestMetadata = request->metadata();        for (const auto& ctrl : requestMetadata)         {            const libcamera::ControlId* id = libcamera::controls::controls.at(ctrl.first);            const libcamera::ControlValue& value = ctrl.second;            std::cout << "\t" << id->name() << " = " << value.toString() << std::endl;        }*/           g_pHost->m_Fps   = (metadata.timestamp - g_pHost->m_LstTi) / 1000000.0f;        g_pHost->m_LstTi = metadata.timestamp; //printf("ti=%0.1f\n", g_pHost->m_Fps);        unsigned int nplane(0);  //metadata.timestamp        for (const libcamera::FrameMetadata::Plane &plane : metadata.planes())//after control its calling once only            memcpy((g_pHost->m_pMem[((g_pHost->m_PicNr + 1) % NUMBUFFS)] + sizeof(BITMAPFILEHEADER)) + sizeof(BITMAPINFOHEADER), g_pHost->m_MapBuffMem.find(buffer)->second, metadata.planes()[nplane++].bytesused);    }    g_pHost->m_PicNr++;    /*    int idx((g_pHost->m_PicNr) % NUMBUFFS);    unsigned long sz(g_pHost->m_BmpFileHdr.bfSize);    g_pHost->JpgDecoder((g_pHost->m_pMem[idx] + sizeof(BITMAPFILEHEADER)) + sizeof(BITMAPINFOHEADER), g_pHost->m_Width, g_pHost->m_Height, g_pHost->m_pMemOut[idx], &sz);//decode to jpg image    g_pHost->m_SzMem[idx] = sz;    */    vcos_mutex_unlock(&g_pHost->m_FrameLatch);      request->reuse(libcamera::Request::ReuseBuffers);    if (g_pHost->m_bParamChg)    {        g_pHost->m_bParamChg = false;        libcamera::ControlList& controls(request->controls());        controls.set<float>(libcamera::controls::Saturation, g_pHost->m_fSaturation);        controls.set<float>(libcamera::controls::Brightness, g_pHost->m_fBrightness);        controls.set<float>(libcamera::controls::Contrast, g_pHost->m_fContrast);        controls.set<float>(libcamera::controls::Sharpness, g_pHost->m_fSharpness);        controls.set<float>(libcamera::controls::ExposureValue, g_pHost->m_fExposureV);        controls.set<int32_t>(libcamera::controls::ExposureTime, g_pHost->m_ExposureT);        controls.set<float>(libcamera::controls::AnalogueGain, g_pHost->m_fGain);        /*        std::int64_t value_pair[2] = { g_pHost->m_Duration / 2, 0 };        controls.set(libcamera::controls::FrameDurationLimits, libcamera::Span<const std::int64_t, 2>(value_pair));        */        //hmm reduce flashing images on lightsource change        controls.set(libcamera::controls::AeEnable, 0);        controls.set(libcamera::controls::AwbEnable, libcamera::controls::AwbModeEnum::AwbFluorescent);        controls.set<int32_t>(libcamera::controls::AeExposureMode, libcamera::controls::AeExposureModeEnum::ExposureShort);        controls.set(libcamera::controls::AeMeteringMode, libcamera::controls::AeConstraintModeEnum::ConstraintNormal);    }    g_pHost->m_Camera->queueRequest(request);}