vpDirectShowSampleGrabberI.cpp

#ifndef DOXYGEN_SHOULD_SKIP_THIS

#include <visp/vpDirectShowSampleGrabberI.h>
#include <visp/vpImageConvert.h>

#include <visp/vpConfig.h>
#if ( defined(VISP_HAVE_DIRECTSHOW) ) 



vpDirectShowSampleGrabberI::vpDirectShowSampleGrabberI()
  : acqGrayDemand(false), acqRGBaDemand(false), specialMediaType(false), invertedSource(false)
{
    //semaphore(0), max value = 1
    copySem = CreateSemaphore (NULL,0,1,NULL);
}

vpDirectShowSampleGrabberI::~vpDirectShowSampleGrabberI()
{
    //destroys the semaphore
    CloseHandle(copySem);
}


STDMETHODIMP vpDirectShowSampleGrabberI::QueryInterface(REFIID riid, void **ppvObject)
{
    if (NULL == ppvObject) return E_POINTER;
    if (riid == __uuidof(IUnknown))
    {
        *ppvObject = static_cast<IUnknown*>(this);
        return S_OK;
    }
    if (riid == __uuidof(ISampleGrabberCB))
    {
        *ppvObject = static_cast<ISampleGrabberCB*>(this);
        return S_OK;
    }
    return E_NOTIMPL;
}

STDMETHODIMP vpDirectShowSampleGrabberI::BufferCB(double Time, BYTE *pBuffer, long BufferLen)
{   
    //if there has been a frame demand
    if(acqGrayDemand || acqRGBaDemand)
    {
        //check if the connected media is compatible 
        if(connectedMediaType.formattype==FORMAT_VideoInfo)
        {
            //retrieve the image information
            VIDEOINFOHEADER *pVih = reinterpret_cast<VIDEOINFOHEADER*>(connectedMediaType.pbFormat);
            BITMAPINFOHEADER bmpInfo = pVih->bmiHeader;
            
            //if biHeight > 0 and the source is not special
            //then  the image needs to be verticaly flipped
            bool flip;
            if(!specialMediaType)
              flip = bmpInfo.biHeight>=0;
            //the source is fourcc and the image is inverted with this compression
            else if(invertedSource)
              flip = true; 
            //fourcc and the image doesn't need to be flipped
            else
              flip = false;

            //if the buffer contains a RGB24 image (DS RGB24 <=> BGR)
            if(connectedMediaType.subtype==MEDIASUBTYPE_RGB24)
            {
                //if it was an RGBa image demand
                if(acqRGBaDemand)
                {
                    //first, resizes the image as needed
                    rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                    //copy and convert the image
                    vpImageConvert::BGRToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                  rgbaIm->getWidth() , rgbaIm->getHeight(), flip);
                    //reset the demand boolean
                    acqRGBaDemand = false;
                }
                else//if it was a grayscale image demand
                {
                    //first, resizes the image as needed
                    grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                    //copy and convert the image
                    vpImageConvert::BGRToGrey(pBuffer, grayIm->bitmap,
                                  grayIm->getWidth(), grayIm->getHeight(), flip);
                    //reset the demand boolean
                    acqGrayDemand = false;
                }
            }
            else
            {
                unsigned long FourCC;
                FourCC = ((bmpInfo.biCompression&0xFF000000)>>24) |
                ((bmpInfo.biCompression&0x00FF0000)>>8) |
                ((bmpInfo.biCompression&0x0000FF00)<<8) |
                (bmpInfo.biCompression&0x000000FF)<<24;
                //if the buffer contains a like YUV420 image
                if(connectedMediaType.subtype==MEDIASUBTYPE_IYUV || FourCC == 'I420')
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YUV420ToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                      rgbaIm->getWidth() , rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YUV420ToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }
                    
                }
                else if(connectedMediaType.subtype==MEDIASUBTYPE_YV12)
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YV12ToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                      rgbaIm->getWidth() , rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YUV420ToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }                   
                }
                else if(connectedMediaType.subtype==MEDIASUBTYPE_YVU9)
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YVU9ToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                      rgbaIm->getWidth() , rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YUV420ToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }                   
                }
                else if(connectedMediaType.subtype==MEDIASUBTYPE_YUY2 ||
                        connectedMediaType.subtype==MEDIASUBTYPE_YUYV)
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YCbCrToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                      rgbaIm->getWidth()*rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YCbCrToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }
                }
                else if(connectedMediaType.subtype==MEDIASUBTYPE_YVYU)
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YCrCbToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                      rgbaIm->getWidth()*rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YCbCrToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }
                }
                else if(connectedMediaType.subtype==MEDIASUBTYPE_UYVY)
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YUV422ToRGBa(pBuffer,(unsigned char*) rgbaIm->bitmap,
                                      rgbaIm->getWidth()*rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::YUV422ToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }                   
                }
                else if(connectedMediaType.subtype==MEDIASUBTYPE_RGB32)
                {
                    //if it was an RGBa image demand
                    if(acqRGBaDemand)
                    {
                        //first, resizes the image as needed
                        rgbaIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        //copy(pBuffer ,pBuffer + 4*rgbaIm->getWidth()*rgbaIm->getHeight(),rgbaIm->bitmap);
                        memcpy(rgbaIm->bitmap,pBuffer ,4*rgbaIm->getWidth()*rgbaIm->getHeight());
                        //reset the demand boolean
                        acqRGBaDemand = false;
                    }
                    else//if it was a grayscale image demand
                    {
                        //first, resizes the image as needed
                        grayIm->resize(abs(bmpInfo.biHeight), bmpInfo.biWidth);
                        //copy and convert the image
                        vpImageConvert::RGBaToGrey(pBuffer, grayIm->bitmap,
                                      grayIm->getWidth() * grayIm->getHeight());
                        //reset the demand boolean
                        acqGrayDemand = false;
                    }                   
                }
            }
        }
        
        //increment the semaphore - allows acquire to continue execution
        ReleaseSemaphore(copySem, 1, NULL);
    }
    return S_OK;
}
#endif

#endif