ntv2framegrabber.cpp

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/* SPDX-License-Identifier: MIT */
#include <ostream>
#include "ntv2framegrabber.h"
#include "ntv2democommon.h"
#include "ntv2utils.h"
#if defined (INCLUDE_AJACC)
    #include "ajaanc/includes/ancillarylist.h"
    #include "ajaanc/includes/ancillarydata_cea608_line21.h"
    using namespace std;
#endif
 
#define NTV2_NUM_IMAGES     (10)
 
//  Convenience macros for EZ logging:
#define FGFAIL(_expr_)      AJA_sERROR  (AJA_DebugUnit_DemoCapture, AJAFUNC << ": " << _expr_)
#define FGWARN(_expr_)      AJA_sWARNING(AJA_DebugUnit_DemoCapture, AJAFUNC << ": " << _expr_)
#define FGDBG(_expr_)       AJA_sDEBUG  (AJA_DebugUnit_DemoCapture, AJAFUNC << ": " << _expr_)
#define FGNOTE(_expr_)      AJA_sNOTICE (AJA_DebugUnit_DemoCapture, AJAFUNC << ": " << _expr_)
#define FGINFO(_expr_)      AJA_sINFO   (AJA_DebugUnit_DemoCapture, AJAFUNC << ": " << _expr_)
 
static QMutex   gMutex;
 
 
NTV2FrameGrabber::NTV2FrameGrabber (QObject * parent)
    :   QThread                 (parent),
        mRestart                (true),
        mAbort                  (false),
        mCheckFor4K             (false),
        mDeinterlace            (true),
        mbFixedReference        (false),
        mBoardNumber            (0),
        mDeviceID               (DEVICE_ID_NOTFOUND),
        mChannel                (NTV2_MAX_NUM_CHANNELS),
        mNumChannels            (0),
        mTsi                    (false),
        mCurrentVideoFormat     (NTV2_FORMAT_UNKNOWN),
        mCurrentColorSpace      (NTV2_LHIHDMIColorSpaceYCbCr),
        mLastVideoFormat        (NTV2_FORMAT_UNKNOWN),
        mDebounceCounter        (0),
        mFormatIsProgressive    (true),
        mInputSource            (NTV2_NUM_INPUTSOURCES),
        mFrameBufferFormat      (NTV2_FBF_ARGB),
        mDoMultiChannel         (false),
        mbWithAudio             (false),
        mAudioOutput            (AJA_NULL),
        mAudioDevice            (AJA_NULL),
        mNumAudioChannels       (0),
        mAudioSystem            (NTV2_AUDIOSYSTEM_1),
        mTimeCodeSource         (NTV2_TCINDEX_INVALID)
{
    ClearCaptionBuffer();
}   //  constructor
 
 
NTV2FrameGrabber::~NTV2FrameGrabber ()
{
    mAbort = true;
    while (isRunning())
        ;   //  Wait for grabber thread to finish
 
    StopAutoCirculate();
 
    if (mAudioOutput)
        delete mAudioOutput;
 
}   //  destructor
 
 
void NTV2FrameGrabber::SetInputSource (const NTV2InputSource inInputSource)
{
    if (inInputSource != mInputSource)
    {
        FGDBG("From " << ::NTV2InputSourceToString (mInputSource) << " to " << ::NTV2InputSourceToString (inInputSource));
        gMutex.lock();
            mInputSource = inInputSource;
            mRestart = true;
        gMutex.unlock();
    }
 
}   //  SetInputSource
 
 
void NTV2FrameGrabber::SetDeviceIndex (const UWord inDeviceIndex)
{
    if (inDeviceIndex != mBoardNumber)
    {
        gMutex.lock();
            mBoardNumber = inDeviceIndex;
            mRestart = true;
        gMutex.unlock();
    }
}   //  SetDeviceIndex
 
 
void NTV2FrameGrabber::SetTimeCodeSource (const NTV2TCIndex inTCIndex)
{
    if (inTCIndex != mTimeCodeSource)
    {
        gMutex.lock();
        mTimeCodeSource = inTCIndex;
        mRestart = true;
        gMutex.unlock();
    }
}   //  SetTimeCodeSource
 
 
UWord NTV2FrameGrabber::GetDeviceIndex (void) const
{
    gMutex.lock();
    const UWord result (mBoardNumber);
    gMutex.unlock();
    return result;
}
 
 
#if defined (INCLUDE_AJACC)
    #if 0
        static const UWord gTest [15][32] =
        //           01      02      03      04      05      06      07      08      09      10      11      12      13      14      15      16
        //           17      18      19      20      21      22      23      24      25      26      27      28      29      30      31      32
        /*01*/ {{0x250C, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014,
                 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2510},
        /*02*/  {0x007C, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E,
                 0x003F, 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x007C},
        /*03*/  {0x007C, 0x004E, 0x004F, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005A, 0x005B, 0x005D,
                 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F, 0x007C},
        /*04*/  {0x007C, 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007A, 0x0020, 0x00E1, 0x00E9, 0x00ED,
                 0x00F3, 0x00FA, 0x00E7, 0x00F7, 0x00D1, 0x00E1, 0x00F1, 0x2588, 0x00AE, 0x00B0, 0x00BD, 0x00BF, 0x2122, 0x00A2, 0x00A3, 0x007C},
        /*05*/  {0x007C, 0x266A, 0x00E0, 0x00A0, 0x00E8, 0x00E2, 0x00EA, 0x00EE, 0x00F4, 0x00FB, 0x00C1, 0x00C9, 0x00D3, 0x00DA, 0x00DC, 0x00FC,
                 0x2018, 0x00A1, 0x002A, 0x2019, 0x2014, 0x00A9, 0x2120, 0x2022, 0x201C, 0x201D, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x007C},
        /*06*/  {0x007C, 0x00C0, 0x00C2, 0x00C7, 0x00C8, 0x00CA, 0x00CB, 0x00EB, 0x00CE, 0x00CF, 0x00EF, 0x00D4, 0x00D9, 0x00F9, 0x00DB, 0x00AB,
                 0x00BB, 0x0020, 0x0020, 0x00C3, 0x00E3, 0x00CD, 0x00CC, 0x00EC, 0x00D2, 0x00F2, 0x00D5, 0x00F5, 0x007B, 0x007D, 0x005C, 0x007C},
        /*07*/  {0x007C, 0x005E, 0x005F, 0x007C, 0x007E, 0x0020, 0x0020, 0x00C4, 0x00E4, 0x00D6, 0x00F6, 0x00DF, 0x00A5, 0x00A4, 0x007C, 0x00C5,
                 0x00E5, 0x00D8, 0x00F8, 0x00C4, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x007C},
        /*08*/  {0x007C, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020,
                 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x007C},
        /*09*/  {0x007C, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E,
                 0x003F, 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x007C},
        /*10*/  {0x007C, 0x004E, 0x004F, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005A, 0x005B, 0x005D,
                 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F, 0x007C},
        /*11*/  {0x007C, 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007A, 0x0020, 0x00E1, 0x00E9, 0x00ED,
                 0x00F3, 0x00FA, 0x00E7, 0x00F7, 0x00D1, 0x00E1, 0x00F1, 0x2588, 0x00AE, 0x00B0, 0x00BD, 0x00BF, 0x2122, 0x00A2, 0x00A3, 0x007C},
        /*12*/  {0x007C, 0x266A, 0x00E0, 0x00A0, 0x00E8, 0x00E2, 0x00EA, 0x00EE, 0x00F4, 0x00FB, 0x00C1, 0x00C9, 0x00D3, 0x00DA, 0x00DC, 0x00FC,
                 0x2018, 0x00A1, 0x002A, 0x2019, 0x2014, 0x00A9, 0x2120, 0x2022, 0x201C, 0x201D, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x007C},
        /*13*/  {0x007C, 0x00C0, 0x00C2, 0x00C7, 0x00C8, 0x00CA, 0x00CB, 0x00EB, 0x00CE, 0x00CF, 0x00EF, 0x00D4, 0x00D9, 0x00F9, 0x00DB, 0x00AB,
                 0x00BB, 0x0020, 0x0020, 0x00C3, 0x00E3, 0x00CD, 0x00CC, 0x00EC, 0x00D2, 0x00F2, 0x00D5, 0x00F5, 0x007B, 0x007D, 0x005C, 0x007C},
        /*14*/  {0x007C, 0x005E, 0x005F, 0x007C, 0x007E, 0x0020, 0x0020, 0x00C4, 0x00E4, 0x00D6, 0x00F6, 0x00DF, 0x00A5, 0x00A4, 0x007C, 0x00C5,
                 0x00E5, 0x00D8, 0x00F8, 0x00C4, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x007C},
        /*15*/  {0x2514, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014,
                 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2014, 0x2518}};
    #endif  //  0
#endif  //  defined (INCLUDE_AJACC)
 
 
void NTV2FrameGrabber::ClearCaptionBuffer (const bool inNotifyClients)
{
    #if defined (INCLUDE_AJACC)
        for (UWord row (NTV2_CC608_MinRow);  row <= NTV2_CC608_MaxRow;  row++)
            for (UWord col (NTV2_CC608_MinCol);  col <= NTV2_CC608_MaxCol;  col++)
                mScreenBuffer [row-1][col-1] = 0x0020;  //  gTest[row-1][col-1];
        if (inNotifyClients)
            emit captionScreenChanged (&mScreenBuffer[0][0]);
    #else
        (void) inNotifyClients;
    #endif
}
 
 
void NTV2FrameGrabber::GrabCaptions (void)
{
    #if defined (INCLUDE_AJACC)
        NTV2_ASSERT (mNTV2Card.IsOpen ());
        NTV2_ASSERT (mDeviceID != DEVICE_ID_NOTFOUND);
 
        if (mNTV2Card.features().CanDoCustomAnc())
        {
            bool            gotCaptionPacket    (false);
            CaptionData     captionData;        //  The two byte pairs (one pair per field) our 608 decoder is looking for
            ostringstream   oss;                //  DEBUG
 
            //  See what's in the AUTOCIRCULATE_TRANSFER's F1 & F2 anc buffers...
            AJAAncillaryList    ancPacketsF1, ancPacketsF2;
            ancPacketsF1.AddReceivedAncillaryData ((uint8_t *) mTransferStruct.acANCBuffer.GetHostPointer (), mTransferStruct.acANCBuffer.GetByteCount ());
            ancPacketsF2.AddReceivedAncillaryData ((uint8_t *) mTransferStruct.acANCField2Buffer.GetHostPointer (), mTransferStruct.acANCField2Buffer.GetByteCount ());
            ancPacketsF1.ParseAllAncillaryData ();
            ancPacketsF2.ParseAllAncillaryData ();
 
            if (ancPacketsF1.CountAncillaryDataWithType (AJAAncillaryDataType_Cea708))
            {
                AJAAncillaryData    ancCEA708DataIn (ancPacketsF1.GetAncillaryDataWithType (AJAAncillaryDataType_Cea708));
                if (ancCEA708DataIn.GetPayloadData () && ancCEA708DataIn.GetPayloadByteCount ())
                    gotCaptionPacket = m708Decoder ? m708Decoder->SetSMPTE334AncData (ancCEA708DataIn.GetPayloadData (), ancCEA708DataIn.GetPayloadByteCount ()) : false;
                //if (gotCaptionPacket)     oss << "Using F1 AJAAnc CEA708 packet(s)";
            }
            if (ancPacketsF1.CountAncillaryDataWithType (AJAAncillaryDataType_Cea608_Vanc))
            {
                AJAAncillaryData    ancCEA608DataIn (ancPacketsF1.GetAncillaryDataWithType (AJAAncillaryDataType_Cea608_Vanc));
                if (ancCEA608DataIn.GetPayloadData () && ancCEA608DataIn.GetPayloadByteCount ())
                    gotCaptionPacket = m708Decoder ? m708Decoder->SetSMPTE334AncData (ancCEA608DataIn.GetPayloadData (), ancCEA608DataIn.GetPayloadByteCount ()) : false;
                //if (gotCaptionPacket)     oss << "Using F1 AJAAnc CEA608 packet(s)";
            }
            if (ancPacketsF1.CountAncillaryDataWithType (AJAAncillaryDataType_Cea608_Line21))
            {
                AJAAncillaryData_Cea608_Line21  ancEIA608DataIn (ancPacketsF1.GetAncillaryDataWithType (AJAAncillaryDataType_Cea608_Line21));
                if (AJA_SUCCESS (ancEIA608DataIn.ParsePayloadData ()))
                    if (AJA_SUCCESS (ancEIA608DataIn.GetCEA608Bytes (captionData.f1_char1, captionData.f1_char2, captionData.bGotField1Data)))
                        gotCaptionPacket = true;
                //if (gotCaptionPacket)     oss << "Using F1 AJAAnc EIA608 packet(s)";
            }
            if (ancPacketsF2.CountAncillaryDataWithType (AJAAncillaryDataType_Cea608_Line21))
            {
                AJAAncillaryData_Cea608_Line21  ancEIA608DataIn (ancPacketsF2.GetAncillaryDataWithType (AJAAncillaryDataType_Cea608_Line21));
                if (AJA_SUCCESS (ancEIA608DataIn.ParsePayloadData ()))
                    if (AJA_SUCCESS (ancEIA608DataIn.GetCEA608Bytes (captionData.f2_char1, captionData.f2_char2, captionData.bGotField2Data)))
                        gotCaptionPacket = true;
                //if (gotCaptionPacket)     oss << "Using F2 AJAAnc EIA608 packet(s)";
            }
 
            if (NTV2_IS_HD_VIDEO_FORMAT (mCurrentVideoFormat))
            {
                if (gotCaptionPacket  &&  m708Decoder  &&  m708Decoder->ParseSMPTE334AncPacket ())
                    captionData = m708Decoder->GetCC608CaptionData ();  //  Extract the 608 caption byte pairs
            }   //  else if HD
 
            //  Sorry, we only handle 608 captions -- nothing else.
            //  The 608 decoder does the rest. It expects to be called once per frame (to implement flashing characters and roll-up).
            //  Pass the caption byte pairs to it for processing (even if captionData.HasData returns false)...
            if (m608Decoder)
                m608Decoder->ProcessNew608FrameData (captionData);
            //if (!oss.str ().empty ()) cerr << oss.str () << endl; //  DEBUG DEBUG DEBUG DEBUG
            //if (captionData.HasData ())   cerr << captionData << endl;
        }   //  if able to use Anc buffers
    #endif  //  defined (INCLUDE_AJACC)
}   //  GrabCaptions
 
 
void NTV2FrameGrabber::changeCaptionChannel (int inNewCaptionChannelId)
{
    #if defined (INCLUDE_AJACC)
        const NTV2Line21Channel chosenCaptionChannel    (static_cast <NTV2Line21Channel> (inNewCaptionChannelId));
 
        if (!m608Decoder && IsValidLine21Channel (chosenCaptionChannel))
        {
            NTV2_ASSERT (!m708Decoder);
            if (CNTV2CaptionDecoder608::Create (m608Decoder) && CNTV2CaptionDecoder708::Create (m708Decoder))
            {
                m608Decoder->SubscribeChangeNotification (Caption608Changed, this);
                m608Decoder->SetDisplayChannel (chosenCaptionChannel);
                ClearCaptionBuffer (true);
            }
            else
                {m608Decoder = AJA_NULL;    m708Decoder = AJA_NULL;}
        }
        else if (m608Decoder)
        {
            NTV2_ASSERT (m708Decoder);
            if (!IsValidLine21Channel (chosenCaptionChannel))
                {m608Decoder = AJA_NULL;    m708Decoder = AJA_NULL;}
            else if (m608Decoder->GetDisplayChannel () != chosenCaptionChannel)
                m608Decoder->SetDisplayChannel (chosenCaptionChannel);
            ClearCaptionBuffer (true);
        }
    #else
        (void) inNewCaptionChannelId;
    #endif  //  defined (INCLUDE_AJACC)
}   //  changeCaptionChannel
 
 
void NTV2FrameGrabber::run (void)
{
    //  Set up 2 images to ping-pong between capture and display...
    QImage *    images [NTV2_NUM_IMAGES];
    ULWord      framesCaptured  (0);
    FGNOTE("Thread started");
 
    //  Initialize images
    for (int i(0);  i < NTV2_NUM_IMAGES;  i++)
        images[i] = new QImage(QTPREVIEW_WIDGET_X, QTPREVIEW_WIDGET_Y, QImage::Format_RGB32);
 
    // Make sure all Bidirectionals are set to Inputs.
    if (mNTV2Card.Open(mBoardNumber))
    {
        if (!mDoMultiChannel && !mNTV2Card.AcquireStreamForApplicationWithReference (kDemoAppSignature, int32_t(AJAProcess::GetPid())))
        {
            //  We have not acquired the board continue until something changes...
            FGWARN("Could not acquire " << mNTV2Card.GetDescription());
            mNTV2Card.Close ();
            mDeviceID = DEVICE_ID_NOTFOUND;
        }
        else
        {
            mNTV2Card.GetEveryFrameServices (mSavedTaskMode);   //  Save the current state before we change it
            mNTV2Card.SetEveryFrameServices (NTV2_OEM_TASKS);   //  Since this is an OEM demo we will set the OEM service level
 
            if (mNTV2Card.features().HasBiDirectionalSDI())     //  If device has bidirectional SDI connectors...
            {
                bool waitForInput = false;
                for (unsigned offset(0);  offset < 8;  offset++)
                {
                    mNTV2Card.EnableChannel (NTV2Channel(offset));
                    bool outputEnabled;
                    mNTV2Card.GetSDITransmitEnable (NTV2Channel(offset), outputEnabled);
                    if (outputEnabled)
                    {
                        waitForInput = true;
                        mNTV2Card.SetSDITransmitEnable (NTV2Channel(offset), false);
                    }
                }
                // Only if we had to change an output to input do we need to wait.
                if (waitForInput)
                    mNTV2Card.WaitForInputVerticalInterrupt (mChannel, 10); //  ...and give the device some time to lock to a signal
            }
        }
    }
 
    while (true)
    {
        if (mAbort)
            break;
 
        if (!NTV2_IS_VALID_INPUT_SOURCE(mInputSource))
        {
            //  No input chosen, so display banner...
            if (NTV2_IS_VALID_CHANNEL(mChannel))
                StopAutoCirculate();
            QImage * currentImage (images[framesCaptured % NTV2_NUM_IMAGES]);
            currentImage->load (":/resources/splash.png");
            emit newStatusString ("");
            emit newFrame (*currentImage, true);
            AJATime::Sleep(200);
            continue;
        }
 
        if (mRestart)
        {
            gMutex.lock();
                StopAutoCirculate();
                if (mNTV2Card.IsOpen())
                {
                    if (!mDoMultiChannel)
                    {
                        mNTV2Card.ReleaseStreamForApplicationWithReference (kDemoAppSignature, AJAProcess::GetPid ());
                        mNTV2Card.SetEveryFrameServices (mSavedTaskMode);
                    }
                    mNTV2Card.Close();
                    mDeviceID = DEVICE_ID_NOTFOUND;
                }
            gMutex.unlock();
 
            if (mNTV2Card.Open(mBoardNumber))
            {
                if (!mDoMultiChannel  &&  !mNTV2Card.AcquireStreamForApplicationWithReference (kDemoAppSignature, int32_t(AJAProcess::GetPid())))
                {
                    //  Haven't acquired the device --- continue til other app releases it...
                    FGWARN(mNTV2Card.GetDisplayName() << " is busy");
                    QImage * currentImage (images[framesCaptured % NTV2_NUM_IMAGES]);
                    currentImage->fill(Qt::lightGray);
                    QString status (QString("%1 is busy").arg(mNTV2Card.GetDisplayName().c_str()));
                    emit newStatusString(status);
                    emit newFrame(*currentImage, true);
                    mNTV2Card.Close();
                    mDeviceID = DEVICE_ID_NOTFOUND;
                    AJATime::Sleep(500);
                    continue;
                }
 
                mNTV2Card.GetEveryFrameServices(mSavedTaskMode);    //  Save the current state before we change it
                mNTV2Card.SetEveryFrameServices(NTV2_OEM_TASKS);    //  Since this is an OEM demo we will set the OEM service level
 
                mDeviceID = mNTV2Card.GetDeviceID();
                if (mNTV2Card.features().CanDoMultiFormat())
                    mNTV2Card.SetMultiFormatMode(true);
 
                if (!mNTV2Card.IsDeviceReady(false))
                {
                    FGWARN(mNTV2Card.GetDisplayName() << " not ready");
                    QImage * currentImage (images[framesCaptured % NTV2_NUM_IMAGES]);
                    currentImage->fill(Qt::lightGray);
                    QString status (QString("%1 is not ready").arg(mNTV2Card.GetDisplayName().c_str()));
                    emit newStatusString(status);
                    emit newFrame(*currentImage, true);
                    AJATime::Sleep(1000);   //  Keep the UI responsive while waiting for device to become ready
                }
                else if (!mNTV2Card.features().CanDoCapture())
                {
                    FGWARN(mNTV2Card.GetDisplayName() << " is output-only device");
                    QImage * currentImage (images[framesCaptured % NTV2_NUM_IMAGES]);
                    currentImage->fill(qRgba(40, 40, 40, 255));
                    QString status (QString("%1 is output-only device").arg(mNTV2Card.GetDisplayName().c_str()));
                    emit newStatusString(status);
                    emit newFrame(*currentImage, true);
                    AJATime::Sleep(1000);   //  Keep the UI responsive
                }
                else if (!mNTV2Card.features().GetNumCSCs())
                {
                    FGWARN(mNTV2Card.GetDisplayName() << " has no CSCs, won't work with NTV2FrameGrabber");
                    QImage * currentImage (images[framesCaptured % NTV2_NUM_IMAGES]);
                    currentImage->fill(qRgba(40, 40, 40, 255));
                    QString status (QString("%1 has no CSCs, won't work for this demo").arg(mNTV2Card.GetDisplayName().c_str()));
                    emit newStatusString(status);
                    emit newFrame(*currentImage, true);
                    AJATime::Sleep(1000);   //  Keep the UI responsive
                }
                else if (SetupInput())
                {
                    mTransferStruct.acANCBuffer.Allocate (mNTV2Card.features().CanDoCustomAnc() ? NTV2_ANCSIZE_MAX : 0);        //  Reserve space for anc data
                    mTransferStruct.acANCField2Buffer.Allocate(mNTV2Card.features().CanDoCustomAnc() ? NTV2_ANCSIZE_MAX : 0);   //  Reserve space for anc data
                    const ULWord acOptions(AUTOCIRCULATE_WITH_RP188  |  (mTransferStruct.acANCBuffer.IsNULL() && mTransferStruct.acANCField2Buffer.IsNULL() ? 0 : AUTOCIRCULATE_WITH_ANC));
                    gMutex.lock();
                        StopAutoCirculate();
                        ULWord numFrameBuffersAvailable = (mNTV2Card.DeviceGetNumberFrameBuffers() - mNTV2Card.features().GetNumAudioSystems());
                        ULWord startFrameBuffer = (numFrameBuffersAvailable / mNTV2Card.features().GetNumFrameStores()) * ULWord(mChannel);
                        mNTV2Card.AutoCirculateInitForInput (mChannel, 0, ::NTV2ChannelToAudioSystem(mChannel),
                                                            acOptions, 1, startFrameBuffer, startFrameBuffer+7);
                    gMutex.unlock();
                    SetupAudio();
                    if (mAudioOutput)
                        mAudioDevice = mAudioOutput->start();
 
                    //  Start AutoCirculate...
                    mNTV2Card.SetLTCInputEnable(true);
                    mNTV2Card.SetRP188SourceFilter (mChannel, 0);   //  0=LTC 1=VITC1 2=VITC2
                    mNTV2Card.AutoCirculateStart(mChannel);
 
                    for (int i(0);  i < NTV2_NUM_IMAGES;  i++)
                    {
                        delete images[i];
                        images[i] = new QImage (mFrameDimensions.Width(), mFrameDimensions.Height(), QImage::Format_RGB32);
                    }
 
                    framesCaptured = 0;
                    mRestart = false;
                }   //  if board set up ok
                else
                    AJATime::Sleep(1000);   //  This keeps the UI responsive if/while this channel has no input
            }   //  if board opened ok
            else
            {
                FGWARN("Open failed for device " << DEC(GetDeviceIndex()));
                AJATime::Sleep(200);
                continue;
            }
 
            emit newStatusString(::NTV2InputSourceToString (mInputSource, true).c_str());
        }   //  if mRestart
 
        if (!CheckForValidInput()  &&  NTV2_IS_VALID_INPUT_SOURCE(mInputSource))
        {
            QImage * currentImage (images[framesCaptured % NTV2_NUM_IMAGES]);
            currentImage->fill(qRgba(40, 40, 40, 255));
            QString status (QString("%1: No Detected Input").arg(::NTV2InputSourceToString(mInputSource, true).c_str()));
            emit newStatusString(status);
            emit newFrame(*currentImage, true);
            AJATime::Sleep(200);
            continue;
        }
 
        AUTOCIRCULATE_STATUS acStatus;
        mNTV2Card.AutoCirculateGetStatus (mChannel, acStatus);
        if (acStatus.acState == NTV2_AUTOCIRCULATE_RUNNING && acStatus.acBufferLevel > 1)
        {
            QImage *            currentImage    (images [framesCaptured % NTV2_NUM_IMAGES]);
            NTV2TimeCodeList    tcValues;
 
            #if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
                mTransferStruct.SetVideoBuffer (reinterpret_cast<PULWord>(currentImage->bits()), ULWord(currentImage->sizeInBytes()));
            #else
                mTransferStruct.SetVideoBuffer (reinterpret_cast<PULWord>(currentImage->bits()), ULWord(currentImage->byteCount()));
            #endif
            mNTV2Card.AutoCirculateTransfer (mChannel, mTransferStruct);
            if (!mFormatIsProgressive && mDeinterlace)
            {
                //  Eliminate field flicker by copying even lines to odd lines...
                //  (a very lame de-interlace technique)
                if (currentImage->height() == int(mFrameDimensions.Height())  &&  currentImage->width() == int(mFrameDimensions.Width()))
                    for (ULWord line (0);  line < mFrameDimensions.Height();  line += 2)
                        ::memcpy (currentImage->scanLine (int(line) + 1),  currentImage->scanLine(int(line)),  mFrameDimensions.Width() * 4);
            }
            GrabCaptions();
            mTimeCode.clear ();
            if (mTransferStruct.acTransferStatus.acFrameStamp.GetInputTimeCodes(tcValues) && size_t(mTimeCodeSource) < tcValues.size())
            {
                CRP188  tc  (tcValues.at(mTimeCodeSource));
                if (!tcValues.at (mTimeCodeSource).IsValid())
                {
                    //  If the requested timecode was invalid, check for embedded LTC
                    if (NTV2_IS_VALID_INPUT_SOURCE(mInputSource))
                        tc.SetRP188 (tcValues.at (::NTV2InputSourceToTimecodeIndex (mInputSource, true)));
                }
                tc.GetRP188Str (mTimeCode);
            }
 
            QString outString (::NTV2InputSourceToString (mInputSource, true).c_str());
            outString.append ("  ");
            outString.append (::NTV2VideoFormatToString (mCurrentVideoFormat).c_str ());
            outString.append ("  ");
            outString.append (mTimeCode.c_str());
 
            emit newStatusString (outString);
 
            emit newFrame (*currentImage, (framesCaptured == 0) ? true : false);
            if (mbWithAudio && mTransferStruct.acAudioBuffer)
                OutputAudio (mTransferStruct.acAudioBuffer, mTransferStruct.acTransferStatus.acAudioTransferSize);
 
            framesCaptured++;
        }   //  if running and at least one frame ready to transfer
        else
            mNTV2Card.WaitForInputVerticalInterrupt (mChannel);
    }   //  loop til break
 
    if (mNTV2Card.IsOpen ())
    {
        gMutex.lock();
        StopAutoCirculate();
        if (!mDoMultiChannel)
        {
            mNTV2Card.ReleaseStreamForApplicationWithReference (kDemoAppSignature, int32_t(AJAProcess::GetPid()));  //  Release the device
            mNTV2Card.SetEveryFrameServices(mSavedTaskMode);    //  Restore prior task mode
        }
        gMutex.unlock();
    }
 
    for (int i(0);  i < NTV2_NUM_IMAGES;  i++)
        delete images[i];
 
    FGNOTE("Thread completed, will exit for " << mNTV2Card.GetDisplayName() << " input " << ::NTV2InputSourceToString(mInputSource));
 
}   //  run
 
 
bool NTV2FrameGrabber::SetupInput (void)
{
    if (!mNTV2Card.IsOpen())
        return false;
    if (mDeviceID == DEVICE_ID_NOTFOUND)
        return false;
 
    mChannel = ::NTV2InputSourceToChannel(mInputSource);
    if (mChannel == NTV2_CHANNEL_INVALID)
        mChannel = NTV2_CHANNEL1;
    mTimeCodeSource = ::NTV2InputSourceToTimecodeIndex(mInputSource);
 
    bool waitForInput(false);
    if (mNTV2Card.features().HasBiDirectionalSDI()) //  If device has bidirectional SDIs...
        for (unsigned offset(0);  offset < 4;  offset++)
        {
            mNTV2Card.EnableChannel(NTV2Channel(mChannel + offset));
            bool outputEnabled;
            mNTV2Card.GetSDITransmitEnable (NTV2Channel(mChannel + offset), outputEnabled);
            if (outputEnabled)
            {
                waitForInput = true;
                mNTV2Card.SetSDITransmitEnable (NTV2Channel(mChannel + offset), false);
            }
        }
 
    //  Only if we had to change an output to input do we need to wait.
    if (waitForInput)
        mNTV2Card.WaitForInputVerticalInterrupt (mChannel, 10); //  Give the device ~10 fields/frames to lock to a signal
 
    mCurrentVideoFormat = GetVideoFormatFromInputSource();
    mCurrentColorSpace = GetColorSpaceFromInputSource();
    mFrameDimensions.Set (QTPREVIEW_WIDGET_X, QTPREVIEW_WIDGET_Y);
    if (!NTV2_IS_VALID_VIDEO_FORMAT(mCurrentVideoFormat))
        return false;   //  No video!
 
    mNTV2Card.SetVideoFormat (mCurrentVideoFormat, false, false, mChannel);
    NTV2VANCMode vm(NTV2_VANCMODE_INVALID);
    mNTV2Card.GetVANCMode (vm, mChannel);
    const NTV2FormatDescriptor fd (mCurrentVideoFormat, mFrameBufferFormat, vm);
    mFrameDimensions.Set (fd.GetRasterWidth(), fd.GetRasterHeight());
    const QString vfString (::NTV2VideoFormatToString(mCurrentVideoFormat).c_str());
    FGDBG("mInputSource=" << mChannel << " mCurrentVideoFormat=" << vfString.toStdString()
            << " wdth=" << mFrameDimensions.Width() << " hght=" << mFrameDimensions.Height());
 
    mFormatIsProgressive = IsProgressivePicture(mCurrentVideoFormat);
    if (!mbFixedReference)
        mNTV2Card.SetReference(NTV2_REFERENCE_FREERUN);
 
    if (NTV2_INPUT_SOURCE_IS_SDI(mInputSource))
    {
        mNumChannels = 0;
        mTsi = false;
 
        bool is6g(false), is12g(false);
        mNTV2Card.GetSDIInput6GPresent(is6g, mChannel);
        mNTV2Card.GetSDIInput12GPresent(is12g, mChannel);
 
        if (mNTV2Card.features().CanDo12gRouting() && (is6g || is12g))
        {
            mNTV2Card.Connect (::GetCSCInputXptFromChannel(mChannel), ::GetSDIInputOutputXptFromChannel(mChannel));
            mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(mChannel), ::GetCSCOutputXptFromChannel (mChannel, false/*isKey*/, true/*isRGB*/));
            mNTV2Card.SetFrameBufferFormat (mChannel, mFrameBufferFormat);
            mNTV2Card.EnableChannel(mChannel);
            mNTV2Card.SetSDIInLevelBtoLevelAConversion (mChannel, IsInput3Gb(mInputSource) ? true : false);
        }
        else for (unsigned offset(0);  offset < 4;  offset++)
        {
            mNumChannels++;
            mNTV2Card.Connect (::GetCSCInputXptFromChannel (NTV2Channel(mChannel + offset)), ::GetSDIInputOutputXptFromChannel(NTV2Channel(mChannel + offset)));
            mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel (NTV2Channel(mChannel + offset)), ::GetCSCOutputXptFromChannel(NTV2Channel(mChannel + offset), false/*isKey*/, true/*isRGB*/));
            mNTV2Card.SetFrameBufferFormat (NTV2Channel(mChannel + offset), mFrameBufferFormat);
            mNTV2Card.EnableChannel (NTV2Channel(mChannel + offset));
            mNTV2Card.SetSDIInLevelBtoLevelAConversion (mChannel + offset, IsInput3Gb(mInputSource) ? true : false);
            if (!NTV2_IS_4K_VIDEO_FORMAT(mCurrentVideoFormat))
                break;
            mNTV2Card.Set4kSquaresEnable(true, NTV2_CHANNEL1);
        }
    }
        else if (mInputSource == NTV2_INPUTSOURCE_ANALOG1)
        {
            mNumChannels = 0;
            mTsi = false;
            //mNTV2Card.SetTsiFrameEnable(false, NTV2_CHANNEL1);
 
            mNTV2Card.Connect (::GetCSCInputXptFromChannel(NTV2_CHANNEL1), NTV2_XptAnalogIn);
            mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(NTV2_CHANNEL1), ::GetCSCOutputXptFromChannel(NTV2_CHANNEL1, false/*isKey*/, true/*isRGB*/));
            mNTV2Card.SetFrameBufferFormat(NTV2_CHANNEL1, mFrameBufferFormat);
            if (!mbFixedReference)
                mNTV2Card.SetReference(NTV2_REFERENCE_ANALOG_INPUT1);
            mChannel = NTV2_CHANNEL1;
            mNumChannels = 1;
        }
        else if (NTV2_INPUT_SOURCE_IS_HDMI(mInputSource))
        {
            mNumChannels = 0;
            mTsi = false;
 
            if (!mbFixedReference)
                mNTV2Card.SetReference(::NTV2InputSourceToReferenceSource(mInputSource));
 
            // configure hdmi with 2.0 support
            if (mNTV2Card.features().CanDo12gRouting())
            {
                mNumChannels = 1;
                mNTV2Card.EnableChannel(mChannel);
                mNTV2Card.SetMode (mChannel, NTV2_MODE_CAPTURE);
                mNTV2Card.SetFrameBufferFormat (mChannel, mFrameBufferFormat);
                if (mCurrentColorSpace == NTV2_LHIHDMIColorSpaceYCbCr)
                {
                    mNTV2Card.Connect (::GetCSCInputXptFromChannel(mChannel),
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, 0/*hdmiQuadrant*/));
                    mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(mChannel),
                                        ::GetCSCOutputXptFromChannel (mChannel, false/*isKey*/, true/*isRGB*/));
                }
                else
                    mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(mChannel),
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, 0/*hdmiQuadrant*/));
            }
            else if (NTV2_IS_4K_VIDEO_FORMAT(mCurrentVideoFormat) && !mNTV2Card.features().CanDoHDMIQuadRasterConversion())
            {
                //  Set two sample interleave
                mChannel = NTV2_CHANNEL1;
                mNTV2Card.SetTsiFrameEnable(true, NTV2_CHANNEL1);
 
                for (NTV2Channel channel (NTV2_CHANNEL1);  channel < NTV2_CHANNEL3;  channel = NTV2Channel(channel+1))
                {
                    mNTV2Card.EnableChannel(channel);
                    mNTV2Card.SetMode (channel, NTV2_MODE_CAPTURE);
                    mNTV2Card.SetFrameBufferFormat (channel, mFrameBufferFormat);
                }
 
                if (mCurrentColorSpace == NTV2_LHIHDMIColorSpaceYCbCr)
                {
                    mNTV2Card.Connect (NTV2_XptCSC1VidInput,
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, NTV2_CHANNEL1/*hdmiQuadrant*/));
                    mNTV2Card.Connect (NTV2_XptCSC2VidInput,
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, NTV2_CHANNEL2/*hdmiQuadrant*/));
                    mNTV2Card.Connect (NTV2_XptCSC3VidInput,
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, NTV2_CHANNEL3/*hdmiQuadrant*/));
                    mNTV2Card.Connect (NTV2_XptCSC4VidInput,
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, NTV2_CHANNEL4/*hdmiQuadrant*/));
 
                    mNTV2Card.Connect (NTV2_Xpt425Mux1AInput, NTV2_XptCSC1VidRGB);
                    mNTV2Card.Connect (NTV2_Xpt425Mux1BInput, NTV2_XptCSC2VidRGB);
                    mNTV2Card.Connect (NTV2_Xpt425Mux2AInput, NTV2_XptCSC3VidRGB);
                    mNTV2Card.Connect (NTV2_Xpt425Mux2BInput, NTV2_XptCSC4VidRGB);
                }
                else
                {
                    mNTV2Card.Connect (NTV2_Xpt425Mux1AInput, ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, NTV2_CHANNEL1/*hdmiQuadrant*/));
                    mNTV2Card.Connect (NTV2_Xpt425Mux1BInput, ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, NTV2_CHANNEL2/*hdmiQuadrant*/));
                    mNTV2Card.Connect (NTV2_Xpt425Mux2AInput, ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, NTV2_CHANNEL3/*hdmiQuadrant*/));
                    mNTV2Card.Connect (NTV2_Xpt425Mux2BInput, ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, NTV2_CHANNEL4/*hdmiQuadrant*/));
                }
 
                mNTV2Card.Connect (NTV2_XptFrameBuffer1Input, NTV2_Xpt425Mux1AYUV);
                mNTV2Card.Connect (NTV2_XptFrameBuffer1DS2Input, NTV2_Xpt425Mux1BYUV);
                mNTV2Card.Connect (NTV2_XptFrameBuffer2Input, NTV2_Xpt425Mux2AYUV);
                mNTV2Card.Connect (NTV2_XptFrameBuffer2DS2Input, NTV2_Xpt425Mux2BYUV);
 
                mNumChannels = 2;
                mTsi = true;
            }   //  if 4K and can't do HDMI quad raster conversion
            else if (NTV2_IS_4K_VIDEO_FORMAT(mCurrentVideoFormat) && mNTV2Card.features().CanDoHDMIQuadRasterConversion())
            {
                mNumChannels = 0;
                mNTV2Card.SetTsiFrameEnable(false, NTV2_CHANNEL1);
                for (NTV2Channel channel(NTV2_CHANNEL1);  channel < NTV2_CHANNEL5;  channel = NTV2Channel(channel+1))
                {
                    mNumChannels++;
                    mNTV2Card.EnableChannel(channel);
                    mNTV2Card.SetMode (channel, NTV2_MODE_CAPTURE);
                    mNTV2Card.SetFrameBufferFormat (channel, mFrameBufferFormat);
                    if (mCurrentColorSpace == NTV2_LHIHDMIColorSpaceYCbCr)
                    {
                        mNTV2Card.Connect (::GetCSCInputXptFromChannel(channel),
                                            ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, channel/*hdmiQuadrant*/));
                        mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(channel),
                                            ::GetCSCOutputXptFromChannel (channel, false/*isKey*/, true/*isRGB*/));
                    }
                    else
                        mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(channel),
                                            ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, channel/*hdmiQuadrant*/));
                }   //  loop once for each channel (4 times for 4K/UHD)
            }   //  else if 4K and can do HDMI quad raster conversion
            else
            {
                mNumChannels = 1;
                mNTV2Card.EnableChannel(mChannel);
                mNTV2Card.SetMode (mChannel, NTV2_MODE_CAPTURE);
                mNTV2Card.SetFrameBufferFormat (mChannel, mFrameBufferFormat);
                if (mCurrentColorSpace == NTV2_LHIHDMIColorSpaceYCbCr)
                {
                    mNTV2Card.Connect (::GetCSCInputXptFromChannel(mChannel),
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, false/*isHDMI_RGB*/, 0/*hdmiQuadrant*/));
                    mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(mChannel),
                                        ::GetCSCOutputXptFromChannel (mChannel, false/*isKey*/, true/*isRGB*/));
                }
                else
                    mNTV2Card.Connect (::GetFrameBufferInputXptFromChannel(mChannel),
                                        ::GetInputSourceOutputXpt (mInputSource, false/*isSDI_DS2*/, true/*isHDMI_RGB*/, 0/*hdmiQuadrant*/));
            }   //  else not 4K
 
            // configure the qrc if present
            if (mNTV2Card.features().GetHDMIVersion() == 2)
                mNTV2Card.SetHDMIV2Mode (NTV2_IS_4K_VIDEO_FORMAT(mCurrentVideoFormat) ? NTV2_HDMI_V2_4K_CAPTURE : NTV2_HDMI_V2_HDSD_BIDIRECTIONAL);
        }
        else
            FGWARN("Bad mInputSource value " << DEC(mInputSource));
 
    return true;
 
}   //  SetupInput
 
 
void NTV2FrameGrabber::StopAutoCirculate (void)
{
    if (mNTV2Card.IsOpen())
    {
        mNTV2Card.AutoCirculateStop(mChannel);
 
        bool tsiEnable(false);
        mNTV2Card.GetTsiFrameEnable (tsiEnable, NTV2_CHANNEL1);
        for (ULWord i(0);  i < (tsiEnable ? 2 : mNumChannels);  i++)
            mNTV2Card.SetMode (NTV2Channel(mChannel + i), NTV2_MODE_DISPLAY);
    }
    ClearCaptionBuffer(true);
 
}   //  StopAutoCirculate
 
 
bool NTV2FrameGrabber::CheckForValidInput (void)
{
    NTV2VideoFormat videoFormat (GetVideoFormatFromInputSource());
    NTV2LHIHDMIColorSpace colorSpace (GetColorSpaceFromInputSource());
 
    if (videoFormat == NTV2_FORMAT_UNKNOWN)
    {
        mCurrentVideoFormat = videoFormat;
        return false;
    }   //  if no video or unknown format
 
    if ((mCurrentVideoFormat != videoFormat) || (mCurrentColorSpace != colorSpace))
    {
        if (mDebounceCounter == 0)
        {
            //  Check to see if the video input has stabilized...
            mLastVideoFormat = videoFormat;
            mDebounceCounter++;
        }
        else if (mDebounceCounter == 6)
        {
            //  The new format is stable -- restart autocirculate...
            mRestart = true;
            mCurrentVideoFormat = videoFormat;
            mDebounceCounter = 0;
        }
        else
        {
            if (mLastVideoFormat == videoFormat)
                mDebounceCounter++;     //  New format still stable -- keep counting
            else
                mDebounceCounter = 0;   //  Input changed again -- start over
        }
        return true;
    }   //  if video format changed
 
    return true;
 
}   //  CheckForValidInput
 
 
NTV2VideoFormat NTV2FrameGrabber::GetVideoFormatFromInputSource (void)
{
    if (!mNTV2Card.IsOpen())
        return NTV2_FORMAT_UNKNOWN;
    if (mDeviceID == DEVICE_ID_NOTFOUND)
        return NTV2_FORMAT_UNKNOWN;
 
    NTV2VideoFormat videoFormat(NTV2_FORMAT_UNKNOWN);
    if (NTV2_INPUT_SOURCE_IS_SDI(mInputSource))
    {
        bool is6g (false), is12g(false);
        NTV2Channel channel (::NTV2InputSourceToChannel(mInputSource));
        mNTV2Card.GetSDIInput6GPresent(is6g, channel);
        mNTV2Card.GetSDIInput12GPresent(is12g, channel);
        if (mNTV2Card.features().CanDo12gRouting() && (is6g || is12g))
        {
            videoFormat = mNTV2Card.GetInputVideoFormat(mInputSource);
            return videoFormat;
        }
    }
 
    switch (mInputSource)
    {
        case NTV2_INPUTSOURCE_SDI1:
        case NTV2_INPUTSOURCE_SDI5:
            {
                const ULWord ndx (::GetIndexForNTV2InputSource(mInputSource));
                videoFormat = mNTV2Card.GetInputVideoFormat(::GetNTV2InputSourceForIndex(ndx + 0));
                NTV2Standard videoStandard (::GetNTV2StandardFromVideoFormat(videoFormat));
                if (mCheckFor4K  &&  (videoStandard == NTV2_STANDARD_1080p))
                {
                    NTV2VideoFormat videoFormatNext (mNTV2Card.GetInputVideoFormat(::GetNTV2InputSourceForIndex(ndx + 1)));
                    if (videoFormatNext == videoFormat)
                    {
                        videoFormatNext = mNTV2Card.GetInputVideoFormat(::GetNTV2InputSourceForIndex(ndx + 2));
                        if (videoFormatNext == videoFormat)
                        {
                            videoFormatNext = mNTV2Card.GetInputVideoFormat(::GetNTV2InputSourceForIndex(ndx + 3));
                            if (videoFormatNext == videoFormat)
                                CNTV2DemoCommon::Get4KInputFormat(videoFormat);
                        }
                    }
                }
            }
            break;
 
        case NTV2_INPUTSOURCE_INVALID:
            break;      //  indicates no source is currently selected
 
        default:
            videoFormat = mNTV2Card.GetInputVideoFormat(mInputSource);
            break;
    }
    return videoFormat;
 
}   //  GetVideoFormatFromInputSource
 
 
NTV2LHIHDMIColorSpace NTV2FrameGrabber::GetColorSpaceFromInputSource (void)
{
    if (NTV2_INPUT_SOURCE_IS_HDMI(mInputSource))
    {
        NTV2LHIHDMIColorSpace hdmiColor (NTV2_LHIHDMIColorSpaceRGB);
        mNTV2Card.GetHDMIInputColor (hdmiColor, mChannel);
        return hdmiColor;
    }
    return NTV2_LHIHDMIColorSpaceYCbCr;
}
 
 
bool NTV2FrameGrabber::IsInput3Gb (const NTV2InputSource inputSource)
{
    bool is3Gb(false);
    mNTV2Card.GetSDIInput3GbPresent (is3Gb, ::NTV2InputSourceToChannel(inputSource));
    return is3Gb;
}   //  IsInput3Gb
 
 
void NTV2FrameGrabber::SetupAudio (void)
{
    if (!mNTV2Card.IsOpen())
        return;
    if (mDeviceID == DEVICE_ID_NOTFOUND)
        return;
 
    mTransferStruct.acAudioBuffer.Allocate(NTV2_AUDIOSIZE_MAX); //  Reserve space for largest audio packet/frame
    if (mAudioOutput)
    {
        delete mAudioOutput;
        mAudioOutput = AJA_NULL;
    }
 
    NTV2AudioSource audioSource (NTV2_AUDIO_EMBEDDED);
    if (NTV2_INPUT_SOURCE_IS_HDMI(mInputSource))
        audioSource = NTV2_AUDIO_HDMI;
    else if (NTV2_INPUT_SOURCE_IS_ANALOG(mInputSource))
        audioSource = NTV2_AUDIO_ANALOG;
 
    //  Set up AJA device audio...
    mNumAudioChannels = mNTV2Card.features().GetMaxAudioChannels();
    mAudioSystem = ::NTV2ChannelToAudioSystem(mChannel);
    mNTV2Card.SetAudioSystemInputSource (mAudioSystem, audioSource, ::NTV2InputSourceToEmbeddedAudioInput(mInputSource));
    mNTV2Card.SetNumberAudioChannels (mNumAudioChannels, mAudioSystem);
    mNTV2Card.SetAudioRate (NTV2_AUDIO_48K, mAudioSystem);
    mNTV2Card.SetAudioBufferSize (NTV2_AUDIO_BUFFER_BIG, mAudioSystem);
 
    //  Set up Qt's audio output...
#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
    mFormat.setSampleRate(48000);
    mFormat.setChannelCount(2);
    mFormat.setSampleSize(16);
    mFormat.setCodec("audio/pcm");
    mFormat.setByteOrder(QAudioFormat::LittleEndian);
    mFormat.setSampleType(QAudioFormat::SignedInt);
#else
    mFormat.setSampleRate(48000);
    mFormat.setChannelCount(2);
    mFormat.setSampleFormat(QAudioFormat::Int16);
#endif
 
#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
    QAudioDeviceInfo audioDeviceInfo (QAudioDeviceInfo::defaultOutputDevice());
    if (audioDeviceInfo.isFormatSupported(mFormat))
        mAudioOutput = new QAudioOutput (mFormat, AJA_NULL);
#else
    QAudioDevice deviceInfo (QMediaDevices::defaultAudioOutput());
    if (deviceInfo.isFormatSupported(mFormat))
        mAudioOutput = new QAudioSink(deviceInfo, mFormat, AJA_NULL);
#endif
}   //  SetupAudio
 
 
void NTV2FrameGrabber::OutputAudio (ULWord * pInOutBuffer, const ULWord inNumValidBytes)
{
    const ULWord    nBytesPerAJASample  (4);    //  AJA devices provide four bytes per channel per sample
    unsigned        channel             (0);    //  Current channel being processed
    UWord           qtSampleNdx         (0);    //  Which Qt audio sample is being processed
    const ULWord    totalSamples        (inNumValidBytes / mNumAudioChannels);      //  Total number of audio samples to process, regardless of channel count
    const ULWord    totalAjaSamples     (inNumValidBytes / nBytesPerAJASample);     //  Total number of AJA-device-provided audio samples, one sample per channel
    UWord *         pQtAudioBuffer      (reinterpret_cast<UWord*>(pInOutBuffer));   //  Qt-centric pointer to the audio buffer (2-bytes per channel per sample)
 
    //
    //  Walk through the audio buffer channel by channel:
    //  0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 ...etc...
    //  and copy samples from channels 0 and 1 up to the front of the buffer...
    //  0 1 0 1 0 1 0 1 0 1 0 1 ...etc..
    //
    for (unsigned ajaSampleNdx(0);  ajaSampleNdx < totalAjaSamples;  ajaSampleNdx++)
    {
        if (channel < 2)
        {
            pQtAudioBuffer [qtSampleNdx] = pInOutBuffer [ajaSampleNdx] >> 16;   //  Also discard the least significant 16 bits of each sample
            qtSampleNdx++;
        }   //  if channel 0 or 1
 
        channel++;
        if (channel == mNumAudioChannels)
            channel = 0;
    }   //  for each channel for each sample
 
    if (mAudioDevice)
        mAudioDevice->write (reinterpret_cast<const char*>(pQtAudioBuffer), totalSamples);
 
}   //  OutputAudio
 
 
#if defined (INCLUDE_AJACC)
    void NTV2FrameGrabber::Caption608Changed (void * pInstance, const NTV2Caption608ChangeInfo & inChangeInfo)
    {
        NTV2FrameGrabber *  pFG (reinterpret_cast <NTV2FrameGrabber *> (pInstance));
        if (pFG)
            pFG->caption608Changed (inChangeInfo);
    }
 
    void NTV2FrameGrabber::caption608Changed (const NTV2Caption608ChangeInfo & inChangeInfo)
    {
        NTV2Line21Attributes    attrs;
        bool                    changed (false);
        for (UWord row (NTV2_CC608_MinRow);  row <= NTV2_CC608_MaxRow;  row++)
            for (UWord col (NTV2_CC608_MinCol);  col <= NTV2_CC608_MaxCol;  col++)
            {
                ushort  utf16Char   (m608Decoder ? m608Decoder->GetOnAirUTF16CharacterWithAttributes (row, col, attrs) : 0x0020);
                if (!utf16Char)
                    utf16Char = 0x0020;
                if (utf16Char != mScreenBuffer [row-1][col-1])
                {
                    mScreenBuffer [row-1][col-1] = utf16Char;
                    changed = true;
                }
            }
        if (changed)
            emit captionScreenChanged (&mScreenBuffer[0][0]);
    }
#endif  //  defined (INCLUDE_AJACC)