/tags/release-1.0.4.3/mkvsplit/mkvsplitfilter.cpp

#include <strmif.h>

#include <uuids.h>

#include "mkvsplitfilter.hpp"

#include "cenumpins.hpp"

#include "mkvsplitoutpin.hpp"

#include "mkvparser.hpp"

#include "mkvparserstreamvideo.hpp"

#include "mkvparserstreamaudio.hpp"

#include <new>

#include <cassert>

#include <vfwmsgs.h>

#include <process.h>

#include <evcode.h>

#include <limits>

#ifdef _DEBUG

#include "iidstr.hpp"

#include "odbgstream.hpp"

using std::endl;

using std::hex;

using std::dec;

#endif



using std::wstring;

//using std::wistringstream;



namespace MkvSplit

{



// {ADB85B5C-AA6B-4192-85FC-B0E087E9CA37}

extern const CLSID CLSID_MkvSplit = 

{ 0xadb85b5c, 0xaa6b, 0x4192, { 0x85, 0xfc, 0xb0, 0xe0, 0x87, 0xe9, 0xca, 0x37 } };



// {4CAB9818-1989-4a5f-8474-2D1F66B420F2}

extern const GUID MEDIASUBTYPE_MKV =   //TODO: use std value

{ 0x4cab9818, 0x1989, 0x4a5f, { 0x84, 0x74, 0x2d, 0x1f, 0x66, 0xb4, 0x20, 0xf2 } };



const LONGLONG Filter::kNoSeek(std::numeric_limits<LONGLONG>::min());



Filter::Lock::Lock() : m_hMutex(0)

{

}





Filter::Lock::~Lock()

{

    Release();

}





HRESULT Filter::Lock::Seize(Filter* pFilter, DWORD timeout)

{

    assert(m_hMutex == 0);

    assert(pFilter);

    

    DWORD index;



    const HRESULT hr = CoWaitForMultipleHandles(

                            0,  //wait flags

                            timeout, 

                            1, 

                            &pFilter->m_hMutex, 

                            &index);



    //despite the "S" in this name, this is an error                        

    if (hr == RPC_S_CALLPENDING)

        return VFW_E_TIMEOUT;



    if (FAILED(hr))

        return hr;

                

    assert(index == 0);



    m_hMutex = pFilter->m_hMutex;

        

    return S_OK;

}





void Filter::Lock::Release()

{

    if (m_hMutex)

    {

        const BOOL b = ReleaseMutex(m_hMutex);

        assert(b);

        b;

        

        m_hMutex = 0;

    }

}







HRESULT CreateInstance(

    IClassFactory* pClassFactory,

    IUnknown* pOuter, 

    const IID& iid, 

    void** ppv)

{

    if (ppv == 0)

        return E_POINTER;

        

    *ppv = 0;



    if ((pOuter != 0) && (iid != __uuidof(IUnknown)))

        return E_INVALIDARG;

    

    Filter* p = new (std::nothrow) Filter(pClassFactory, pOuter);

    

    if (p == 0)

        return E_OUTOFMEMORY;

        

    assert(p->m_nondelegating.m_cRef == 0);

    

    const HRESULT hr = p->m_nondelegating.QueryInterface(iid, ppv);

    

    if (SUCCEEDED(hr))

    {

        assert(*ppv);

        assert(p->m_nondelegating.m_cRef == 1);

        

        return S_OK;

    }

    

    assert(*ppv == 0);

    assert(p->m_nondelegating.m_cRef == 0);



    delete p;

    p = 0;



    return hr;

}





#pragma warning(disable:4355)  //'this' ptr in member init list

Filter::Filter(IClassFactory* pClassFactory, IUnknown* pOuter)

    : m_pClassFactory(pClassFactory),

      m_nondelegating(this),

      m_pOuter(pOuter ? pOuter : &m_nondelegating),

      m_state(State_Stopped),

      m_clock(0),

      m_hThread(0),

      m_pSegment(0),

      m_pSeekBase(0),

      m_seekTime(kNoSeek),

      m_inpin(this),

      m_cStarvation(-1)  //means "not starving"

{

    m_pClassFactory->LockServer(TRUE);

            

    m_hMutex = CreateMutex(0, 0, 0);

    assert(m_hMutex);  //TODO

    

    m_hNewCluster = CreateEvent(0, 0, 0, 0);

    assert(m_hNewCluster);  //TODO

    

    m_info.pGraph = 0;

    m_info.achName[0] = L'\0';

    

#ifdef _DEBUG        

    odbgstream os;

    os << "mkvsplit::ctor" << endl;

#endif    

}

#pragma warning(default:4355)





Filter::~Filter()

{

#ifdef _DEBUG

    odbgstream os;

    os << "mkvsplit::dtor" << endl;

#endif



    assert(m_hThread == 0);

    assert(m_outpins.empty());

    

    assert(m_pSegment == 0);

    

    const BOOL b = CloseHandle(m_hMutex);

    b;

    assert(b);

    

    m_pClassFactory->LockServer(FALSE);

}      





void Filter::Init()

{

    assert(m_hThread == 0);

    

    if (!m_inpin.m_reader.IsOpen())

        return;

        

    if (m_pSegment->Unparsed() <= 0)

        return;  //nothing for thread to do

    

    const uintptr_t h = _beginthreadex(

                            0,  //security

                            0,  //stack size

                            &Filter::ThreadProc,

                            this,

                            0,   //run immediately

                            0);  //thread id

                            

    m_hThread = reinterpret_cast<HANDLE>(h);

    assert(m_hThread);

}





void Filter::Final()

{

    if (m_hThread == 0)

        return;

        

    assert(m_inpin.m_reader.IsOpen());

    

    //odbgstream os;

    //os << "mkvsplit::Filter::Final(begin)" << endl;

    //os << "mkvsplit::Filter::Final: calling BeginFlush" << endl;

        

    //TODO: calling BeginFlush has the exact opposite semantics that 

    //I thought it did: if flush is in effect, then the SyncRead blocks

    //indefinitely, until EndFlush is called.  In the local file playback

    //case this isn't a problem, since SyncRead will never officially block.

    //The problem case occurs when this is a slow network download, and 

    //SyncRead blocks.  I thought that BeginFlush could be used to cancel

    //the SyncRead in progress, but that doesn't appear to be the case.  

    //(Apparently it cancels asyncronous reads, not synchronous reads.)

    //This only really matters during the transition to stopped.  In that

    //case we could do something ugly like timeout the wait for signal

    //of thread termination, then if timeout occurs then forcibly 

    //terminate the thread (but I don't know if that will work either).

    //The only other alternative is to use proper timed reads, but 

    //that requires that reads be aligned.

    

    //HRESULT hr = pReader->BeginFlush();

    //assert(SUCCEEDED(hr));

    //    

    //os << "mkvsplit::Filter::Final: called BeginFlush; "

    //   << "waiting for thread termination" 

       //<< endl;



    const DWORD dw = WaitForSingleObject(m_hThread, INFINITE);

    dw;

    assert(dw == WAIT_OBJECT_0);

 

    //os << "mkvsplit::Filter::Final: thread terminated" << endl;



    const BOOL b = CloseHandle(m_hThread);

    b;

    assert(b);

    

    m_hThread = 0;

    

    //os << "mkvsplit::Filter::Final: calling EndFlush" << endl;



    //hr = pReader->EndFlush();

    //assert(SUCCEEDED(hr));



    //os << "mkvsplit::Filter::Final: called EndFlush" << endl;

    //os << "mkvsplit::Filter::Final(end)" << endl;

}





Filter::CNondelegating::CNondelegating(Filter* p)

    : m_pFilter(p),

      m_cRef(0)  //see CreateInstance

{

}





Filter::CNondelegating::~CNondelegating()

{

}





HRESULT Filter::CNondelegating::QueryInterface(

    const IID& iid, 

    void** ppv)

{

    if (ppv == 0)

        return E_POINTER;

        

    IUnknown*& pUnk = reinterpret_cast<IUnknown*&>(*ppv);

     

    if (iid == __uuidof(IUnknown))    

    {

        pUnk = this;  //must be nondelegating

    }   

    else if ((iid == __uuidof(IBaseFilter)) ||

             (iid == __uuidof(IMediaFilter)) ||

             (iid == __uuidof(IPersist)))

    {

        pUnk = static_cast<IBaseFilter*>(m_pFilter);

    }

    else

    {

#if 0

        wodbgstream os;

        os << "mkvsource::filter::QI: iid=" << IIDStr(iid) << std::endl;

#endif        

        pUnk = 0;

        return E_NOINTERFACE;

    }



    pUnk->AddRef();

    return S_OK;

}





ULONG Filter::CNondelegating::AddRef()

{

    return InterlockedIncrement(&m_cRef);

}



    

ULONG Filter::CNondelegating::Release()

{

    const LONG n = InterlockedDecrement(&m_cRef);

    

    //odbgstream os;

    //os << "Filter::Release: n=" << n << endl;

    

    if (n > 0)

        return n;

        

    delete m_pFilter;

    return 0;

}





HRESULT Filter::QueryInterface(const IID& iid, void** ppv)

{

    return m_pOuter->QueryInterface(iid, ppv);

}





ULONG Filter::AddRef()

{

    return m_pOuter->AddRef();

}





ULONG Filter::Release()

{

    return m_pOuter->Release();

}





HRESULT Filter::GetClassID(CLSID* p)

{

    if (p == 0)

        return E_POINTER;

        

    *p = CLSID_MkvSplit;

    return S_OK;

}







HRESULT Filter::Stop()

{

    //Stop is a synchronous operation: when it completes,

    //the filter is stopped.



    //odbgstream os;



    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;

        

    //odbgstream os;

    //os << "mkvsplit::Filter::Stop" << endl;



    switch (m_state)

    {

        case State_Paused:

        case State_Running:

            

            //Stop is synchronous.  When stop completes, all threads

            //should be stopped.  What does "stopped" mean"  In our

            //case it probably means "terminated".

            //It's a bit tricky here because we hold the filter

            //lock.  If threads need to acquire filter lock

            //then we'll have to release it.  Only the FGM can call

            //Stop, etc, so there's no problem to release lock

            //while Stop is executing, to allow threads to acquire

            //filter lock temporarily.

            //The streaming thread will receiving an indication

            //automatically (assuming it's connected), either via

            //GetBuffer or Receive, so there's nothing this filter

            //needs to do to tell the streaming thread to stop.

            //One implementation strategy is to have build a

            //vector of thread handles, and then wait for a signal

            //on one of them.  When the handle is signalled 

            //(meaning that the thread has terminated), then 

            //we remove that handle from the vector, close the

            //handle, and the wait again.  Repeat until the

            //all threads have been terminated.

            //We also need to clean up any unused samples,

            //and decommit the allocator.  (In fact, we could

            //decommit the allocator immediately, and then wait

            //for the threads to terminated.)

            

            //os << "mkvsplit::filter::stop: calling Release" << endl;



            m_state = State_Stopped;



            lock.Release();

            

            //os << "mkvsplit::filter::stop: called Release; calling OnStop" << endl;

            

            OnStop();            

            

            //os << "mkvsplit::filter::stop: called OnStop; calling Seize" << endl;

                

            hr = lock.Seize(this);

            assert(SUCCEEDED(hr));  //TODO

            

            //os << "mkvsplit::filter::stop: Seize called" << endl;



            break;            



        case State_Stopped:

        default:

            break;

    }

    

    return S_OK;

}





HRESULT Filter::Pause()

{

    //Unlike Stop(), Pause() can be asynchronous (that's why you have

    //GetState()).  We could use that here to build the samples index.    



    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;

        

    //odbgstream os;

    //os << "mkvsplit::Filter::Pause" << endl;

        

    switch (m_state)

    {

        case State_Stopped:

            OnStart();

            break;



        case State_Running:

        case State_Paused:

        default:

            break;            

    }

    

    m_state = State_Paused;

    return S_OK;

}





HRESULT Filter::Run(REFERENCE_TIME start)

{

    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;

    

    //odbgstream os;

    //os << "mkvsplit::Filter::Run" << endl;



    switch (m_state)

    {

        case State_Stopped:

            OnStart();

            break;



        case State_Paused:        

        case State_Running:

        default:

            break;            

    }



    m_start = start;

    m_state = State_Running;

    

    return S_OK;

}





HRESULT Filter::GetState( 

    DWORD timeout,

    FILTER_STATE* p)

{

    if (p == 0)

        return E_POINTER;

        

    //What the GetState.timeout parameter refers to is not to locking

    //the filter, but rather to waiting to determine the current state.

    //A request to Stop is always synchronous (hence no timeout parameter), 

    //but a request to Pause can be asynchronous, so the caller can say

    //how long he's willing to wait for the transition (to paused) to

    //complete.

    

    //TODO: implement a waiting scheme here.  We'll probably have to 

    //use SignalObjectAndWait atomically release the mutex and then

    //wait for the condition variable to change.    

    //if (hr == VFW_E_TIMEOUT)

    //    return VFW_S_STATE_INTERMEDIATE;

    

    Lock lock;

    

    HRESULT hrLock = lock.Seize(this);

    

    //The lock is only used for synchronization.  If Seize fails,

    //it means there's a serious problem with the filter.

    

    if (FAILED(hrLock))

        return E_FAIL;

        

    FILTER_STATE& state = *p;

        

    //odbgstream os;

        

    if (m_cStarvation < 0)  //not starving

    {    

        //os << "\nmkvsplit::Filter::GetState: NOT STARVING\n" << endl;



        state = m_state;

        return S_OK;

    }



    long count = m_pSegment->GetCount();



    if (count > m_cStarvation)

    {

        //os << "\nmkvsplit::Filter::GetState: cStarvation=" << m_cStarvation

        //   << " clusters.count=" << count

        //   << "; EXITING STARVATION MODE\n"

        //   << endl;



        m_cStarvation = -1;



        state = m_state;  //TODO: should be State_Paused?

        return S_OK;

    }



    for (;;)

    {

        //os << "\nmkvsplit::Filter::GetState: cStarvation=" << m_cStarvation

        //   << " clusters.count=" << count

        //   << " timeout=" << timeout

        //   << "; WAITING FOR SIGNAL\n"

        //   << endl;



        lock.Release();



        DWORD index;

        

        //TODO: this timeout isn't quite correct.  The parameter refers

        //to the total wait time.  As used here in the call to WaitForHandles,

        //it refers to the wait time for this pass through the loop.



        const HRESULT hrWait = CoWaitForMultipleHandles(

                                0,  //wait flags

                                timeout, 

                                1, 

                                &m_hNewCluster,

                                &index);



        if (SUCCEEDED(hrWait))

            assert(index == 0);        

        else if (hrWait != RPC_S_CALLPENDING) //despite the "S" in this name, this is an error                        

            return hrWait;

            

        hrLock = lock.Seize(this);



        if (FAILED(hrLock))

            return E_FAIL;



        count = m_pSegment->GetCount();

        

        if (count > m_cStarvation)

        {

            //os << "\nmkvsplit::Filter::GetState(cont'd): cStarvation=" << m_cStarvation

            //   << " clusters.count=" << count

            //   << "; EXITING STARVATION MODE\n"

            //   << endl;



            m_cStarvation = -1;



            state = m_state;  //TODO: should be State_Paused?

            return S_OK;

        }

        

        if (FAILED(hrWait))  //there was a timeout before receiving signal

        {

            //os << "\nmkvsplit::Filter::GetState(cont'd): cStarvation=" << m_cStarvation

            //   << " clusters.count=" << count

            //   << "; INTERMEDIATE FILTER STATE\n"

            //   << endl;



           return VFW_S_STATE_INTERMEDIATE;

        }

    }

}







HRESULT Filter::SetSyncSource( 

    IReferenceClock* clock)

{

    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;



    if (m_clock)

        m_clock->Release();

        

    m_clock = clock;

    

    if (m_clock)

        m_clock->AddRef();



    return S_OK;

}





HRESULT Filter::GetSyncSource( 

    IReferenceClock** pclock)

{

    if (pclock == 0)

        return E_POINTER;

        

    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;



    IReferenceClock*& clock = *pclock;

        

    clock = m_clock;

    

    if (clock)

        clock->AddRef();



    return S_OK;

}





HRESULT Filter::EnumPins(IEnumPins** pp)

{

    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;

        

    const ULONG outpins_count = static_cast<ULONG>(m_outpins.size());

    const ULONG n = 1 + outpins_count;

    

    //odbgstream os;

    //os << "mkvsplit::filter::enumpins: n=" << n << endl;

    

    const size_t cb = n * sizeof(IPin*);

    IPin** const pins = (IPin**)_alloca(cb);

        

    IPin** pin = pins;

    

    *pin++ = &m_inpin;

    

    typedef outpins_t::iterator iter_t;



    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    while (i != j)

        *pin++ = *i++;        

    

    return CEnumPins::CreateInstance(pins, n, pp);        

}







HRESULT Filter::FindPin( 

    LPCWSTR id1,

    IPin** pp)

{

    if (pp == 0)

        return E_POINTER;

        

    IPin*& p = *pp;

    p = 0;

    

    if (id1 == 0)

        return E_INVALIDARG;

        

    {

        Pin* const pPin = &m_inpin;



        const wstring& id2_ = pPin->m_id;

        const wchar_t* const id2 = id2_.c_str();

        

        if (wcscmp(id1, id2) == 0)  //case-sensitive

        {

            p = pPin;

            p->AddRef();

            

            return S_OK;

        }

    }    

        

    typedef outpins_t::const_iterator iter_t;



    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    while (i != j)

    {

        Pin* const pPin = *i++;



        const wstring& id2_ = pPin->m_id;

        const wchar_t* const id2 = id2_.c_str();

        

        if (wcscmp(id1, id2) == 0)  //case-sensitive

        {

            p = pPin;

            p->AddRef();

            

            return S_OK;

        }

    }    

    

    return VFW_E_NOT_FOUND;

}







HRESULT Filter::QueryFilterInfo(FILTER_INFO* p)

{

    if (p == 0)

        return E_POINTER;

        

    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;



    enum { size = sizeof(p->achName)/sizeof(WCHAR) };

    const errno_t e = wcscpy_s(p->achName, size, m_info.achName);

    e;

    assert(e == 0);



    p->pGraph = m_info.pGraph;

    

    if (p->pGraph)

        p->pGraph->AddRef();

        

    return S_OK;

}





HRESULT Filter::JoinFilterGraph( 

    IFilterGraph *pGraph,

    LPCWSTR name)

{

    Lock lock;

    

    HRESULT hr = lock.Seize(this);

    

    if (FAILED(hr))

        return hr;

    

    //NOTE: 

    //No, do not adjust reference counts here!

    //Read the docs for the reasons why.

    //ENDNOTE.    

    

    m_info.pGraph = pGraph;



    if (name == 0)

        m_info.achName[0] = L'\0';

    else

    {

        enum { size = sizeof(m_info.achName)/sizeof(WCHAR) };

        const errno_t e = wcscpy_s(m_info.achName, size, name);

        e;

        assert(e == 0);  //TODO

    }

    

    return S_OK;

}





HRESULT Filter::QueryVendorInfo(LPWSTR* pstr)

{

    if (pstr == 0)

        return E_POINTER;

        

    wchar_t*& str = *pstr;

    

    str = 0;

    return E_NOTIMPL;

}





HRESULT Filter::Open(MkvParser::IMkvFile* pFile)

{

    if (m_pSegment)

        return VFW_E_WRONG_STATE;

        

    assert(pFile);

    assert(m_outpins.empty());

    

    __int64 result, pos;

    

    //TODO: must initialize header to defaults

    

    MkvParser::EBMLHeader h;

    

    result = h.Parse(pFile, pos);

    

    if (result < 0)  //error

        return static_cast<HRESULT>(result);

        

    if (result > 0)  //need more data

        return VFW_E_BUFFER_UNDERFLOW;  //require full header 

        

    if (h.m_version > 1)

        return VFW_E_INVALID_FILE_FORMAT;

        

    if (h.m_maxIdLength > 8)

        return VFW_E_INVALID_FILE_FORMAT;

    

    if (h.m_maxSizeLength > 8)

        return VFW_E_INVALID_FILE_FORMAT;

        

    if (_stricmp(h.m_docType.c_str(), "matroska") != 0)

        return VFW_E_INVALID_FILE_FORMAT;

        

    //Just the EBML header has been consumed.  pos points

    //to start of (first) segment.

    

    MkvParser::Segment* p;

    

    result = MkvParser::Segment::CreateInstance(pFile, pos, p);

    

    if (result < 0)

        return static_cast<HRESULT>(result);

        

    if (result > 0)

        return VFW_E_BUFFER_UNDERFLOW;

        

    assert(p);

    

    std::auto_ptr<MkvParser::Segment> pSegment(p);

    

    result = pSegment->ParseHeaders();

    

    if (result < 0)

        return static_cast<HRESULT>(result);

        

    if (result > 0)

        return VFW_E_BUFFER_UNDERFLOW;

    

    const MkvParser::Tracks* const pTracks = pSegment->GetTracks();

        

    if (pTracks == 0)

        return VFW_E_INVALID_FILE_FORMAT;

        

    const MkvParser::SegmentInfo* const pInfo = pSegment->GetInfo();

    

    if (pInfo == 0)

        return VFW_E_INVALID_FILE_FORMAT;  //TODO: liberalize

    

    using MkvParser::VideoTrack;

    using MkvParser::VideoStream;



    using MkvParser::AudioTrack;

    using MkvParser::AudioStream;

    

    using MkvParser::Stream;

    

    typedef Stream::TCreateOutpins<VideoTrack, VideoStream, Filter> EV;

    typedef Stream::TCreateOutpins<AudioTrack, AudioStream, Filter> EA;

    

    const EV ev(this, &VideoStream::CreateInstance);

    pTracks->EnumerateVideoTracks(ev);

    

    const EA ea(this, &AudioStream::CreateInstance);

    pTracks->EnumerateAudioTracks(ea);

    

    if (m_outpins.empty())

        return VFW_E_INVALID_FILE_FORMAT;  //TODO: better return value here?

        

    //ALLOCATOR_PROPERTIES props;

    //props.cbBuffer = GetMaxBufferSize();

    //props.cbAlign = 1;

    //props.cbPrefix = 0;

    //props.cBuffers = 1;

    

    //HRESULT hr = pReader->RequestAllocator(0, &props, &m_pAllocator);

    //assert(SUCCEEDED(hr));  //TODO

    //assert(bool(m_pAllocator));

    

    m_pSegment = pSegment.release();

    m_pSeekBase = 0;

    m_seekTime = kNoSeek;



    return S_OK;

}





void Filter::CreateOutpin(MkvParser::Stream* s)

{

    //Outpin* const p = new (std::nothrow) Outpin(this, s);

    Outpin* const p = Outpin::Create(this, s);    

    m_outpins.push_back(p);

}







void Filter::OnStart()

{

    //TODO: init inpin

    

    typedef outpins_t::iterator iter_t;

    

    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    int n = 0;

    

    while (i != j)

    {

        Outpin* const pPin = *i++;

        assert(pPin);

        

        const HRESULT hr = pPin->Start();

        assert(SUCCEEDED(hr));

        

        if (hr == S_OK)

            ++n;

    }

    

    if (n)

        m_cStarvation = 0;  //temporarily enter starvation mode to force check

    

    Init();

}





void Filter::OnStop()

{

    Final();

    

    typedef outpins_t::iterator iter_t;

    

    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    while (i != j)

    {

        Outpin* const pPin = *i++;

        assert(pPin);

        

        pPin->Stop();

    }

    

    //TODO: final inpin

}





int Filter::GetConnectionCount() const

{

    //filter already locked by caller

    

    int n = 0;

    

    typedef outpins_t::const_iterator iter_t;

    

    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    while (i != j)

    {

        const Outpin* const pin = *i++;

        assert(pin);

        

        if (pin->m_pPinConnection)

            ++n;

    }

    

    return n;

}        





unsigned Filter::ThreadProc(void* pv)

{

    Filter* const pFilter = static_cast<Filter*>(pv);

    assert(pFilter);

    

    return pFilter->Main();

}





unsigned Filter::Main()

{

    assert(m_pSegment);

    const __int64 stop = m_pSegment->m_start + m_pSegment->m_size;

    stop;

    

    //odbgstream os;

    //os << "mkvsplit::filter::main: thread running" << endl;

    

    for (;;)

    {

        Sleep(0);

        

        MkvParser::Cluster* pCluster;

        __int64 pos;

        

        HRESULT hr = m_pSegment->ParseCluster(pCluster, pos);

        assert(SUCCEEDED(hr));  //TODO

        assert((hr != S_OK) || (pCluster != 0));

        

        //os << "mkvsplit::filter::main: cluster=0x" << (void*)pCluster

        //   << " pos=" << pos

        //   << "/" << stop

        //   << " hr=0x" << hex << hr << dec

        //   << endl;

           

        if (FAILED(hr))  //TODO: how to handle outpin streaming threads?

            return 1;

            

        Lock lock;

        

        hr = lock.Seize(this);

        assert(SUCCEEDED(hr));  //TODO



        if (FAILED(hr))

            return 1;  //TODO: pCluster != 0 => memory leak

            

        const bool bDone = m_pSegment->AddCluster(pCluster, pos);

        

        //os << "mkvsplit::filter::main: AddCluster; newcount="

        //   << m_pSegment->GetCount()

        //   << endl;

           

        OnNewCluster();



        if (bDone)

        {

            //os << "mkvsplit::filter::main: AddCluster returned Done; EXITING" << endl;

            return 0;

        }

            

        if (m_state == State_Stopped)

        {

            //os << "mkvsplit::filter::main: state=Stopped; EXITING" << endl;

            return 0;

        }

    }

}





void Filter::OnNewCluster()

{

    const BOOL b = SetEvent(m_hNewCluster);  //see Filter::GetState

    b;

    assert(b);

        

    typedef outpins_t::iterator iter_t;

    

    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    while (i != j)

    {

        Outpin* const outpin = *i++;

        assert(outpin);

        

        outpin->OnNewCluster();

    }    

}





HRESULT Filter::OnDisconnectInpin()

{

    assert(m_hThread == 0);

    

    //wodbgstream os;

    //os << "MkvSplit::Filter::OnDisconnectInpin(begin)" << endl;

    

    while (!m_outpins.empty())

    {

        Outpin* const pPin = m_outpins.back();

        assert(pPin);

        

        if (IPin* pPinConnection = pPin->m_pPinConnection)

        {

            assert(m_info.pGraph);

        

            HRESULT hr = m_info.pGraph->Disconnect(pPinConnection);

            assert(SUCCEEDED(hr));

            

            hr = m_info.pGraph->Disconnect(pPin);

            assert(SUCCEEDED(hr));

        }



        m_outpins.pop_back();

        

        //os << "MkvSplit::Filter::OnDisconnectInpin(cont'd): destroying outpin["

        //   << pPin->m_id

        //   << "]"

        //   << endl;



        const ULONG n = pPin->Destroy();

        n;



        //os << "MkvSplit::Filter::OnDisconnectInpin(cont'd): destroyed outpin"

        //   << "; n=" << n

        //   << endl;

    }

    

    m_seekTime = kNoSeek;

    m_pSeekBase = 0;



    delete m_pSegment;

    m_pSegment = 0;



    //os << "MkvSplit::Filter::OnDisconnectInpin(end)" << endl;

    

    return S_OK;

}





void Filter::OnStarvation(ULONG count)

{

#ifdef _DEBUG

    odbgstream os;

    os << "mkvsplit::Filter::OnStarvation: count=" << count

       << " m_cStarvation=" << m_cStarvation

       << endl;

#endif



    if (m_cStarvation < 0)

    {    

        const GraphUtil::IMediaEventSinkPtr pSink(m_info.pGraph);

        assert(bool(pSink));

        

        const HRESULT hr = pSink->Notify(EC_STARVATION, 0, 0);

        hr;

        assert(SUCCEEDED(hr));

        

        m_cStarvation = count;

    }

}





void Filter::SetCurrPosition(

    LONGLONG currTime, 

    DWORD dwCurr,

    Outpin* pOutpin)

{

    assert(pOutpin);

    assert(bool(pOutpin->m_pPinConnection));

    

    MkvParser::Stream* const pSeekStream = pOutpin->GetStream();

    assert(pSeekStream);



    //odbgstream os;

        

    if (m_seekTime == currTime)

    {

        pSeekStream->SetCurrPosition(m_pSeekBase);

        //os << "mkvsource::filter::setcurrpos: seektime=currtime #1" << endl;

        return;

    }



    if (pSeekStream->m_pTrack->GetType() == 1)  //video    

    {

        const AM_MEDIA_TYPE& mt = pOutpin->m_connection_mtv[0];

        const BOOL bVideo = (mt.majortype == MEDIATYPE_Video);

        bVideo;

        assert(bVideo);



        m_pSeekBase = pSeekStream->SetCurrPosition(currTime, dwCurr);

        m_seekTime = currTime;        

        //os << "mkvsource::filter::setcurrpos: outpin is video #2" << endl;

        return;

    }

    

    typedef outpins_t::const_iterator iter_t;

    

    iter_t i = m_outpins.begin();

    const iter_t j = m_outpins.end();

    

    while (i != j)

    {

        const Outpin* const pin = *i++;

        assert(pin);

        

        if (!bool(pin->m_pPinConnection))

            continue;

        

        const AM_MEDIA_TYPE& mt = pin->m_connection_mtv[0];

        const BOOL bVideo = (mt.majortype == MEDIATYPE_Video);

        

        if (!bVideo)

            continue;

            

        MkvParser::Stream* const pStream = pin->GetStream();

        assert(pStream);

        assert(pStream != pSeekStream);

        assert(pStream->m_pTrack->GetType() == 1);  //video

        

        const LONGLONG ns = pSeekStream->GetSeekTime(currTime, dwCurr);

        m_pSeekBase = pStream->GetSeekBase(ns);

        m_seekTime = currTime;

        

        //os << "mkvsource::filter::setcurrpos: searched for and found video pin;"

        //   << " timecode[ns]=" << ns

        //   << " seekbase.time[ns]="

        //   << ((m_pSeekBase == 0) ? -42 : m_pSeekBase->GetTime())

        //   << " #3a"

        //   << endl;



        pSeekStream->SetCurrPosition(m_pSeekBase);



        //os << "mkvsource::filter::setcurrpos: searched for and found video pin #3b" << endl;

        return;

    }

    

    //os << "mkvsource::filter::setcurrpos: searched for but did not find video pin #4" << endl;



    m_pSeekBase = pSeekStream->SetCurrPosition(currTime, dwCurr);

    m_seekTime = currTime;        

}







} //end namespace MkvSplit