ntv2streamplayer.cpp

Go to the documentation of this file.

/* SPDX-License-Identifier: MIT */
#include "ntv2streamplayer.h"
#include "ntv2debug.h"
#include "ntv2devicescanner.h"
#include "ntv2testpatterngen.h"
#include "ajabase/common/timebase.h"
#include "ajabase/system/process.h"
#include <fstream>  //  For ifstream
 
using namespace std;
 
//  Convenience macros for EZ logging:
#define TCFAIL(_expr_)  AJA_sERROR  (AJA_DebugUnit_TimecodeGeneric, AJAFUNC << ": " << _expr_)
#define TCWARN(_expr_)  AJA_sWARNING(AJA_DebugUnit_TimecodeGeneric, AJAFUNC << ": " << _expr_)
#define TCNOTE(_expr_)  AJA_sNOTICE (AJA_DebugUnit_TimecodeGeneric, AJAFUNC << ": " << _expr_)
#define TCINFO(_expr_)  AJA_sINFO   (AJA_DebugUnit_TimecodeGeneric, AJAFUNC << ": " << _expr_)
#define TCDBG(_expr_)   AJA_sDEBUG  (AJA_DebugUnit_TimecodeGeneric, AJAFUNC << ": " << _expr_)
 
static const bool       BUFFER_PAGE_ALIGNED (true);
 
 
NTV2StreamPlayer::NTV2StreamPlayer (const PlayerConfig & inConfig)
    :   mConfig             (inConfig),
        mConsumerThread     (),
        mProducerThread     (),
        mDevice             (),
        mDeviceID           (DEVICE_ID_INVALID),
        mSavedTaskMode      (NTV2_TASK_MODE_INVALID),
        mCurrentFrame       (0),
        mFormatDesc         (),
        mGlobalQuit         (false),
        mTCBurner           (),
        mHostBuffers        (),
        mTestPatRasters     ()
{
}
 
 
NTV2StreamPlayer::~NTV2StreamPlayer (void)
{
    //  Stop my playout and producer threads, then destroy them...
    Quit();
}   //  destructor
 
 
void NTV2StreamPlayer::Quit (void)
{
    //  Set the global 'quit' flag, and wait for the threads to go inactive...
    mGlobalQuit = true;
 
    while (mProducerThread.Active())
        AJATime::Sleep(10);
 
    while (mConsumerThread.Active())
        AJATime::Sleep(10);
 
    if (!mConfig.fDoMultiFormat  &&  mDevice.IsOpen())
    {
        mDevice.ReleaseStreamForApplication (kDemoAppSignature, int32_t(AJAProcess::GetPid()));
        if (NTV2_IS_VALID_TASK_MODE(mSavedTaskMode))
            mDevice.SetEveryFrameServices(mSavedTaskMode);      //  Restore prior task mode
    }
}   //  Quit
 
 
AJAStatus NTV2StreamPlayer::Init (void)
{
    AJAStatus   status  (AJA_STATUS_SUCCESS);
 
    //  Open the device...
    if (!CNTV2DeviceScanner::GetFirstDeviceFromArgument (mConfig.fDeviceSpec, mDevice))
        {cerr << "## ERROR:  Device '" << mConfig.fDeviceSpec << "' not found" << endl;  return AJA_STATUS_OPEN;}
    mDeviceID = mDevice.GetDeviceID();  //  Keep this ID handy -- it's used frequently
 
    if (!mDevice.IsDeviceReady(false))
        {cerr << "## ERROR:  Device '" << mDevice.GetDisplayName() << "' not ready" << endl;  return AJA_STATUS_INITIALIZE;}
    if (!mDevice.features().CanDoPlayback())
        {cerr << "## ERROR:  '" << mDevice.GetDisplayName() << "' is capture-only" << endl;  return AJA_STATUS_FEATURE;}
    if (!mDevice.features().CanDoStreamingDMA())
        {cerr << "## ERROR:  '" << mDevice.GetDisplayName() << "' does not support streaming DMA" << endl;  return AJA_STATUS_FEATURE;}
 
    const UWord maxNumChannels (mDevice.features().GetNumFrameStores());
 
    //  Beware -- some older devices (e.g. Corvid1) can only output from FrameStore 2...
    if ((mConfig.fOutputChannel == NTV2_CHANNEL1) && (!mDevice.features().CanDoFrameStore1Display()))
        mConfig.fOutputChannel = NTV2_CHANNEL2;
    if (UWord(mConfig.fOutputChannel) >= maxNumChannels)
    {
        cerr    << "## ERROR:  '" << mDevice.GetDisplayName() << "' can't use Ch" << DEC(mConfig.fOutputChannel+1)
                << " -- only supports Ch1" << (maxNumChannels > 1  ?  string("-Ch") + string(1, char(maxNumChannels+'0'))  :  "") << endl;
        return AJA_STATUS_UNSUPPORTED;
    }
 
    if (!mConfig.fDoMultiFormat)
    {
        mDevice.GetEveryFrameServices(mSavedTaskMode);      //  Save the current task mode
        if (!mDevice.AcquireStreamForApplication (kDemoAppSignature, int32_t(AJAProcess::GetPid())))
            return AJA_STATUS_BUSY;     //  Device is in use by another app -- fail
    }
    mDevice.SetEveryFrameServices(NTV2_OEM_TASKS);          //  Set OEM service level
 
    if (mDevice.features().CanDoMultiFormat())
        mDevice.SetMultiFormatMode(mConfig.fDoMultiFormat);
    else
        mConfig.fDoMultiFormat = false;
 
    //  Set up the video and audio...
    status = SetUpVideo();
    if (AJA_FAILURE(status))
        return status;
 
    //  Set up the circular buffers, and the test pattern buffers...
    status = SetUpHostBuffers();
    if (AJA_FAILURE(status))
        return status;
    status = SetUpTestPatternBuffers();
    if (AJA_FAILURE(status))
        return status;
 
    //  Set up the device signal routing...
    if (!RouteOutputSignal())
        return AJA_STATUS_FAIL;
 
    //  Lastly, prepare my AJATimeCodeBurn instance...
    if (!mTCBurner.RenderTimeCodeFont (CNTV2DemoCommon::GetAJAPixelFormat(mConfig.fPixelFormat), mFormatDesc.numPixels, mFormatDesc.numLines))
        {cerr << "## ERROR:  RenderTimeCodeFont failed for:  " << mFormatDesc << endl;  return AJA_STATUS_UNSUPPORTED;}
 
    //  Ready to go...
    #if defined(_DEBUG)
        cerr << mConfig << endl;
    #endif  //  defined(_DEBUG)
    return AJA_STATUS_SUCCESS;
 
}   //  Init
 
 
AJAStatus NTV2StreamPlayer::SetUpVideo (void)
{
    //  Configure the device to output the requested video format...
    if (mConfig.fVideoFormat == NTV2_FORMAT_UNKNOWN)
        return AJA_STATUS_BAD_PARAM;
    if (!mDevice.features().CanDoVideoFormat(mConfig.fVideoFormat))
    {   cerr    << "## ERROR:  '" << mDevice.GetDisplayName() << "' doesn't support "
                << ::NTV2VideoFormatToString(mConfig.fVideoFormat) << endl;
        return AJA_STATUS_UNSUPPORTED;
    }
    if (!mDevice.features().CanDoFrameBufferFormat(mConfig.fPixelFormat))
    {   cerr    << "## ERROR: '" << mDevice.GetDisplayName() << "' doesn't support "
                << ::NTV2FrameBufferFormatString(mConfig.fPixelFormat) << endl;
        return AJA_STATUS_UNSUPPORTED;
    }
 
    //  This demo doesn't playout dual-link RGB over SDI -- only YCbCr.
    //  Check that this device has a CSC to convert RGB to YUV...
    if (::IsRGBFormat(mConfig.fPixelFormat))    //  If RGB FBF...
        if (UWord(mConfig.fOutputChannel) > mDevice.features().GetNumCSCs())    //  No CSC for this channel?
            {cerr << "## ERROR: No CSC for channel " << DEC(mConfig.fOutputChannel+1) << " to convert RGB pixel format" << endl;
                return AJA_STATUS_UNSUPPORTED;}
 
    if (!mDevice.features().CanDo3GLevelConversion() && mConfig.fDoABConversion && ::IsVideoFormatA(mConfig.fVideoFormat))
        mConfig.fDoABConversion = false;
    if (mConfig.fDoABConversion)
        mDevice.SetSDIOutLevelAtoLevelBConversion (mConfig.fOutputChannel, mConfig.fDoABConversion);
 
    //  Keep the raster description handy...
    mFormatDesc = NTV2FormatDescriptor(mConfig.fVideoFormat, mConfig.fPixelFormat);
    if (!mFormatDesc.IsValid())
        return AJA_STATUS_FAIL;
 
    //  Turn on the FrameStore (to read frame buffer memory and transmit video)...
    mDevice.EnableChannel(mConfig.fOutputChannel);
    mDevice.SetMode(mConfig.fOutputChannel, NTV2_MODE_DISPLAY);
 
    //  This demo assumes VANC is disabled...
    mDevice.SetVANCMode(NTV2_VANCMODE_OFF, mConfig.fOutputChannel);
    mDevice.SetVANCShiftMode(mConfig.fOutputChannel, NTV2_VANCDATA_NORMAL);
 
    //  Set the FrameStore video format...
    mDevice.SetVideoFormat (mConfig.fVideoFormat, false, false, mConfig.fOutputChannel);
//  mDevice.SetTsiFrameEnable(true, mConfig.fOutputChannel);
 
    //  Set the frame buffer pixel format for the device FrameStore...
    mDevice.SetFrameBufferFormat (mConfig.fOutputChannel, mConfig.fPixelFormat);
 
    //  Check if HDR anc is permissible...
    if (IS_KNOWN_AJAAncDataType(mConfig.fTransmitHDRType)  &&  !mDevice.features().CanDoCustomAnc())
        {cerr << "## WARNING:  HDR Anc requested, but device can't do custom anc" << endl;
            mConfig.fTransmitHDRType = AJAAncDataType_Unknown;}
 
    //  Set output clock reference...
    mDevice.SetReference(mDevice.features().CanDo2110() ? NTV2_REFERENCE_SFP1_PTP : NTV2_REFERENCE_FREERUN);
 
    //  At this point, video setup is complete (except for widget signal routing).
    return AJA_STATUS_SUCCESS;
 
}   //  SetUpVideo
 
 
AJAStatus NTV2StreamPlayer::SetUpHostBuffers (void)
{
    CNTV2DemoCommon::SetDefaultPageSize();  //  Set host-specific page size
 
    //  Allocate and add each in-host NTV2FrameData to my circular buffer member variable...
    mHostBuffers.reserve(CIRCULAR_BUFFER_SIZE);
    while (mHostBuffers.size() < CIRCULAR_BUFFER_SIZE)
    {
        mHostBuffers.push_back(FrameData());        //  Make a new NTV2FrameData...
        FrameData & frameData(mHostBuffers.back()); //  ...and get a reference to it
 
        //  Allocate a page-aligned video buffer
        if (mConfig.WithVideo())
        {
            if (!frameData.fVideoBuffer.Allocate (mFormatDesc.GetTotalBytes(), BUFFER_PAGE_ALIGNED))
            {
                PLFAIL("Failed to allocate " << xHEX0N(mFormatDesc.GetTotalBytes(),8) << "-byte video buffer");
                return AJA_STATUS_MEMORY;
            }
        }
        frameData.fDataReady = false;
    }   //  for each NTV2FrameData
 
    mProducerIndex = 0;
    mConsumerIndex = 0;
 
    return AJA_STATUS_SUCCESS;
 
}   //  SetUpHostBuffers
 
 
AJAStatus NTV2StreamPlayer::SetUpTestPatternBuffers (void)
{
    vector<NTV2TestPatternSelect>   testPatIDs;
        testPatIDs.push_back(NTV2_TestPatt_ColorBars100);
        testPatIDs.push_back(NTV2_TestPatt_ColorBars75);
        testPatIDs.push_back(NTV2_TestPatt_Ramp);
        testPatIDs.push_back(NTV2_TestPatt_MultiBurst);
        testPatIDs.push_back(NTV2_TestPatt_LineSweep);
        testPatIDs.push_back(NTV2_TestPatt_CheckField);
        testPatIDs.push_back(NTV2_TestPatt_FlatField);
        testPatIDs.push_back(NTV2_TestPatt_MultiPattern);
        testPatIDs.push_back(NTV2_TestPatt_Border);
 
    mTestPatRasters.clear();
    for (size_t tpNdx(0);  tpNdx < testPatIDs.size();  tpNdx++)
        mTestPatRasters.push_back(NTV2Buffer());
 
    if (!mFormatDesc.IsValid())
        {PLFAIL("Bad format descriptor");  return AJA_STATUS_FAIL;}
    if (mFormatDesc.IsVANC())
        {PLFAIL("VANC should have been disabled: " << mFormatDesc);  return AJA_STATUS_FAIL;}
 
    //  Set up one video buffer for each test pattern...
    for (size_t tpNdx(0);  tpNdx < testPatIDs.size();  tpNdx++)
    {
        //  Allocate the buffer memory...
        if (!mTestPatRasters.at(tpNdx).Allocate (mFormatDesc.GetTotalBytes(), BUFFER_PAGE_ALIGNED))
        {   PLFAIL("Test pattern buffer " << DEC(tpNdx+1) << " of " << DEC(testPatIDs.size()) << ": "
                    << xHEX0N(mFormatDesc.GetTotalBytes(),8) << "-byte page-aligned alloc failed");
            return AJA_STATUS_MEMORY;
        }
 
        //  Fill the buffer with test pattern...
        NTV2TestPatternGen  testPatternGen;
        if (!testPatternGen.DrawTestPattern (testPatIDs.at(tpNdx),  mFormatDesc,  mTestPatRasters.at(tpNdx)))
        {
            cerr << "## ERROR:  DrawTestPattern " << DEC(tpNdx) << " failed: " << mFormatDesc << endl;
            return AJA_STATUS_FAIL;
        }
    }   //  loop for each predefined pattern
 
    return AJA_STATUS_SUCCESS;
 
}   //  SetUpTestPatternBuffers
 
 
bool NTV2StreamPlayer::RouteOutputSignal (void)
{
    const NTV2Standard  outputStandard  (::GetNTV2StandardFromVideoFormat(mConfig.fVideoFormat));
    const UWord         numSDIOutputs   (mDevice.features().GetNumVideoOutputs());
    const bool          isRGB           (::IsRGBFormat(mConfig.fPixelFormat));
    const bool          canVerify       (mDevice.features().HasCrosspointConnectROM());
    UWord               connectFailures (0);
 
    const NTV2OutputXptID   cscVidOutXpt(::GetCSCOutputXptFromChannel(mConfig.fOutputChannel,  false/*isKey*/,  !isRGB/*isRGB*/));
    const NTV2OutputXptID   fsVidOutXpt (::GetFrameBufferOutputXptFromChannel(mConfig.fOutputChannel,  isRGB/*isRGB*/,  false/*is425*/));
    const NTV2InputXptID    cscInputXpt (isRGB ? ::GetCSCInputXptFromChannel(mConfig.fOutputChannel, false/*isKeyInput*/) : NTV2_INPUT_CROSSPOINT_INVALID);
    if (isRGB)
        if (!mDevice.Connect (cscInputXpt,  fsVidOutXpt,  canVerify))
            connectFailures++;
 
    if (mConfig.fDoMultiFormat)
    {
        //  Multiformat --- We may be sharing the device with other processes, so route only one SDI output...
        if (mDevice.features().HasBiDirectionalSDI())
            mDevice.SetSDITransmitEnable(mConfig.fOutputChannel, true);
 
        if (!mDevice.Connect (::GetSDIOutputInputXpt (mConfig.fOutputChannel, false/*isDS2*/),  isRGB ? cscVidOutXpt : fsVidOutXpt,  canVerify))
            connectFailures++;
        //  NOTE: No need to send VITC2 with VITC1 (for "i" formats) -- firmware does this automatically
        mDevice.SetSDIOutputStandard (mConfig.fOutputChannel, outputStandard);
    }
    else
    {
        //  Not multiformat:  We own the whole device, so connect all possible SDI outputs...
        const UWord numFrameStores(mDevice.features().GetNumFrameStores());
        mDevice.ClearRouting();     //  Start with clean slate
 
        if (isRGB)
            if (!mDevice.Connect (cscInputXpt,  fsVidOutXpt,  canVerify))
                connectFailures++;
 
        for (NTV2Channel chan(NTV2_CHANNEL1);  ULWord(chan) < numSDIOutputs;  chan = NTV2Channel(chan+1))
        {
            if (chan != mConfig.fOutputChannel  &&  chan < numFrameStores)
                mDevice.DisableChannel(chan);               //  Disable unused FrameStore
            if (mDevice.features().HasBiDirectionalSDI())
                mDevice.SetSDITransmitEnable (chan, true);  //  Make it an output
 
            if (!mDevice.Connect (::GetSDIOutputInputXpt (chan, false/*isDS2*/),  isRGB ? cscVidOutXpt : fsVidOutXpt,  canVerify))
                connectFailures++;
            mDevice.SetSDIOutputStandard (chan, outputStandard);
            //  NOTE: No need to send VITC2 with VITC1 (for "i" formats) -- firmware does this automatically
        }   //  for each SDI output spigot
 
        //  And connect analog video output, if the device has one...
        if (mDevice.features().GetNumAnalogVideoOutputs())
            if (!mDevice.Connect (::GetOutputDestInputXpt(NTV2_OUTPUTDESTINATION_ANALOG1),  isRGB ? cscVidOutXpt : fsVidOutXpt,  canVerify))
                connectFailures++;
 
        //  And connect HDMI video output, if the device has one...
        if (mDevice.features().GetNumHDMIVideoOutputs())
            if (!mDevice.Connect (::GetOutputDestInputXpt(NTV2_OUTPUTDESTINATION_HDMI1),  isRGB ? cscVidOutXpt : fsVidOutXpt,  canVerify))
                connectFailures++;
    }
    if (connectFailures)
        PLWARN(DEC(connectFailures) << " 'Connect' call(s) failed");
    return connectFailures == 0;
 
}   //  RouteOutputSignal
 
 
AJAStatus NTV2StreamPlayer::Run (void)
{
    //  Start my consumer and producer threads...
    StartConsumerThread();
    StartProducerThread();
    return AJA_STATUS_SUCCESS;
 
}   //  Run
 
 
 
//  This is where the play thread starts
 
void NTV2StreamPlayer::StartConsumerThread (void)
{
    //  Create and start the playout thread...
    mConsumerThread.Attach (ConsumerThreadStatic, this);
    mConsumerThread.SetPriority(AJA_ThreadPriority_High);
    mConsumerThread.Start();
 
}   //  StartConsumerThread
 
 
//  The playout thread function
void NTV2StreamPlayer::ConsumerThreadStatic (AJAThread * pThread, void * pContext)      //  static
{   (void) pThread;
    //  Grab the NTV2StreamPlayer instance pointer from the pContext parameter,
    //  then call its ConsumeFrames method...
    NTV2StreamPlayer * pApp (reinterpret_cast<NTV2StreamPlayer*>(pContext));
    if (pApp)
        pApp->ConsumeFrames();
 
}   //  ConsumerThreadStatic
 
 
void NTV2StreamPlayer::ConsumeFrames (void)
{
    NTV2StreamChannel   strStatus;
    NTV2StreamBuffer    bfrStatus;
    ULWord              goodQueue(0), badQueue(0), goodRelease(0), badRelease(0), starves(0), noRoomWaits(0), status(0);
    PLNOTE("Thread started");
 
    //  Lock and map the buffers...
    for (FrameDataArrayIter iterHost (mHostBuffers.begin());  iterHost != mHostBuffers.end();  ++iterHost)
        if (iterHost->fVideoBuffer)
            mDevice.DMABufferLock(iterHost->fVideoBuffer, true);
 
    //  Initialize and claim ownership of the stream
    status = mDevice.StreamChannelInitialize(mConfig.fOutputChannel);
    if (status != NTV2_STREAM_STATUS_SUCCESS)
    {
        cerr << "## ERROR:  Stream initialize failed: " << status << endl;
        mGlobalQuit = true;
    }
 
    while (!mGlobalQuit)
    {
        //  Get stream status
        status = mDevice.StreamChannelStatus(mConfig.fOutputChannel, strStatus);
        if (status != NTV2_STREAM_STATUS_SUCCESS)
            {cerr << "## ERROR:  Stream status failed: " << status << endl;  return;}
 
        if (strStatus.GetQueueDepth() < 6)
        {
            FrameData * pFrameData (&mHostBuffers[mConsumerIndex]);
            if (pFrameData->fDataReady)
            {
                //  Queue frame to stream
                status = mDevice.StreamBufferQueue (mConfig.fOutputChannel, pFrameData->fVideoBuffer, mConsumerIndex, bfrStatus);
                if (status == NTV2_STREAM_STATUS_SUCCESS)
                {
                    goodQueue++;
                    mConsumerIndex = (mConsumerIndex + 1) % CIRCULAR_BUFFER_SIZE;
                }
                else
                {
                    badQueue++;
                    cerr << "## ERROR:  Stream buffer add failed: " << status << endl;
                }
 
                if (goodQueue == 3)
                {
                    //  Stop the stream (this will start streaming the first buffer to the output)
                    status = mDevice.StreamChannelStop (mConfig.fOutputChannel, strStatus);
                    if (status != NTV2_STREAM_STATUS_SUCCESS)
                        {cerr << "## ERROR:  Stream stop failed: " << status << endl;  return;}
 
                    //  Wait for stream to start...
                    mDevice.StreamChannelWait (mConfig.fOutputChannel, strStatus);
                    while (!strStatus.IsIdle())
                        mDevice.StreamChannelWait (mConfig.fOutputChannel, strStatus);
 
                    //  Wait a few more frames for output to stabilize...
                    for (int i = 0;  i < 30;  i++)
                        mDevice.StreamChannelWait (mConfig.fOutputChannel, strStatus);
 
                    //  Now start the stream...
                    status = mDevice.StreamChannelStart (mConfig.fOutputChannel, strStatus);
                    if (status != NTV2_STREAM_STATUS_SUCCESS)
                        {cerr << "## ERROR:  Stream start failed: " << status << endl;  return;}
                }
            }
            else
                starves++;
            continue;   //  Back to top of while loop
        }
        else
            noRoomWaits++;
 
        //  Look for buffers to release
        status = mDevice.StreamBufferRelease(mConfig.fOutputChannel, bfrStatus);
        while (status == NTV2_STREAM_STATUS_SUCCESS)
        {
            if (bfrStatus.mBufferCookie < CIRCULAR_BUFFER_SIZE)
            {
                mHostBuffers[bfrStatus.mBufferCookie].fDataReady = false;
                goodRelease++;
            }
            else
            {
                badRelease++;
            }
            status = mDevice.StreamBufferRelease(mConfig.fOutputChannel, bfrStatus);
        }
 
        //  Wait for one or more buffers to become available on the device, which should occur at next VBI...
        if (mDevice.StreamChannelWait(mConfig.fOutputChannel, strStatus) != NTV2_STREAM_STATUS_SUCCESS)
            break;
    }   //  loop til quit signaled
 
    //  Stop streaming...
    status = mDevice.StreamChannelInitialize (mConfig.fOutputChannel);
    if (status != NTV2_STREAM_STATUS_SUCCESS)
        {cerr << "## ERROR:  Stream initialize failed: " << status << endl;  return;}
 
    //  Release all buffers
    while (mDevice.StreamBufferRelease (mConfig.fOutputChannel, bfrStatus) == NTV2_STREAM_STATUS_SUCCESS)
    {
        if (bfrStatus.mBufferCookie < CIRCULAR_BUFFER_SIZE)
        {   //  Signal that I'm done consuming this FrameData, making it immediately available for more data...
            mHostBuffers[bfrStatus.mBufferCookie].fDataReady = false;
            goodRelease++;
        }
        else
            badRelease++;
    }
 
    //  Release stream ownership
    status = mDevice.StreamChannelRelease (mConfig.fOutputChannel);
    if (status != NTV2_STREAM_STATUS_SUCCESS)
    {
        cerr << "## ERROR:  Stream release failed: " << status << endl;
        return;
    }    
 
    PLNOTE("Thread completed: " << DEC(goodQueue) << " queued, " << DEC(badQueue) << " failed, "
            << DEC(starves) << " starves, " << DEC(noRoomWaits) << " waits, "
            << DEC(goodRelease) << " releases (" << DEC(badRelease) << " failed)");
 
}   //  ConsumeFrames
 
 
 
//  This is where the producer thread starts
 
void NTV2StreamPlayer::StartProducerThread (void)
{
    //  Create and start the producer thread...
    mProducerThread.Attach(ProducerThreadStatic, this);
    mProducerThread.SetPriority(AJA_ThreadPriority_High);
    mProducerThread.Start();
 
}   //  StartProducerThread
 
 
void NTV2StreamPlayer::ProducerThreadStatic (AJAThread * pThread, void * pContext)  //  static
{   (void) pThread;
    NTV2StreamPlayer * pApp (reinterpret_cast<NTV2StreamPlayer*>(pContext));
    if (pApp)
        pApp->ProduceFrames();
 
}   //  ProducerThreadStatic
 
 
void NTV2StreamPlayer::ProduceFrames (void)
{
    ULWord  testPatNdx(0), badTally(0);
    double  timeOfLastSwitch    (0.0);
 
    const AJATimeBase       timeBase        (CNTV2DemoCommon::GetAJAFrameRate(::GetNTV2FrameRateFromVideoFormat(mConfig.fVideoFormat)));
    const NTV2StringList    tpNames         (NTV2TestPatternGen::getTestPatternNames());
    const bool              isInterlace     (!NTV2_VIDEO_FORMAT_HAS_PROGRESSIVE_PICTURE(mConfig.fVideoFormat));
    const bool              isPAL           (NTV2_IS_PAL_VIDEO_FORMAT(mConfig.fVideoFormat));
    const NTV2FrameRate     ntv2FrameRate   (::GetNTV2FrameRateFromVideoFormat(mConfig.fVideoFormat));
    const TimecodeFormat    tcFormat        (CNTV2DemoCommon::NTV2FrameRate2TimecodeFormat(ntv2FrameRate));
 
    PLNOTE("Thread started");
 
    while (!mGlobalQuit)
    {
        FrameData * pFrameData (&mHostBuffers[mProducerIndex]);
        if (pFrameData->fDataReady)
        {   
            badTally++;         //  No frame available!
            AJATime::Sleep(10); //  Wait a bit for the consumer thread to free one up for me...
            continue;           //  ...then try again
        }
 
        //  Copy fresh, unmodified, pre-rendered test pattern into this frame's video buffer...
        pFrameData->fVideoBuffer.CopyFrom (mTestPatRasters.at(testPatNdx),
                                            /*srcOffset*/ 0,
                                            /*dstOffset*/ 0,
                                            /*byteCount*/ pFrameData->fVideoBuffer.GetByteCount());
    
        const   CRP188  rp188Info (mCurrentFrame++, 0, 0, 10, tcFormat);
        NTV2_RP188      tcF1, tcF2;
        string          tcString;
 
        rp188Info.GetRP188Reg(tcF1);
        rp188Info.GetRP188Str(tcString);
 
        //  Include timecode in output signal...
        tcF2 = tcF1;
        if (isInterlace)
        {   //  Set bit 27 of Hi word (PAL) or Lo word (NTSC)
            if (isPAL) tcF2.fHi |=  BIT(27);    else tcF2.fLo |=  BIT(27);
        }
 
        if (pFrameData->fVideoBuffer.GetHostAddress(0))
        {   //  Burn current timecode into the video buffer...
            mTCBurner.BurnTimeCode (pFrameData->fVideoBuffer.GetHostAddress(0), tcString.c_str(), 80);
        }
        TCDBG("F" << DEC0N(mCurrentFrame-1,6) << ": " << tcF1 << ": " << tcString);
 
        //  Every few seconds, change the test pattern and tone frequency...
        const double currentTime (timeBase.FramesToSeconds(mCurrentFrame));
        if (currentTime > timeOfLastSwitch + 4.0)
        {
            testPatNdx = (testPatNdx + 1) % ULWord(mTestPatRasters.size());
            timeOfLastSwitch = currentTime;
            PLINFO("F" << DEC0N(mCurrentFrame,6) << ": " << tcString << "pattern='" << tpNames.at(testPatNdx) << "'");
        }   //  if time to switch test pattern
 
        //  Signal that I'm done producing this FrameData, making it immediately available for transfer/playout...
        pFrameData->fDataReady = true;
        mProducerIndex = (mProducerIndex + 1) % CIRCULAR_BUFFER_SIZE;
    }   //  loop til mGlobalQuit goes true
 
    PLNOTE("Thread completed: " << DEC(mCurrentFrame) << " frame(s) produced, " << DEC(badTally) << " failed");
}   //  ProduceFrames
 
 
void NTV2StreamPlayer::GetStreamStatus (NTV2StreamChannel & outStatus)
{
    mDevice.StreamChannelStatus(mConfig.fOutputChannel, outStatus);
}