HRESULT
MediaChunk::Write(Atom* patm)
{
// record chunk start position
LONGLONG posChunk = patm->Position() + patm->Length();
if (m_bOldIndexFormat)
{
long cBytes = 0;
// ensure that we don't break in the middle of a sample (Maxim Kartavenkov)
const int MAX_PCM_SIZE = 22050;
int max_bytes = MAX_PCM_SIZE - (MAX_PCM_SIZE % m_pTrack->Handler()->BlockAlign());
list<IMediaSample*>::iterator it = m_Samples.begin();
long cAvail = 0;
BYTE* pBuffer = NULL;
for (;;)
{
if (!cAvail)
{
if (it == m_Samples.end())
{
break;
}
IMediaSample* pSample = *it++;
pSample->GetPointer(&pBuffer);
cAvail = pSample->GetActualDataLength();
REFERENCE_TIME tStart, tStop;
if (SUCCEEDED(pSample->GetTime(&tStart, &tStop)))
{
m_pTrack->SetOldIndexStart(tStart);
}
}
long cThis = max_bytes - cBytes;
if (cThis > cAvail)
{
cThis = cAvail;
}
int cActual = 0;
m_pTrack->Handler()->WriteData(patm, pBuffer, cThis, &cActual);
cBytes += cActual;
cAvail -= cActual;
pBuffer += cActual;
if (cBytes >= max_bytes)
{
m_pTrack->OldIndex(posChunk, cBytes);
posChunk = patm->Position() + patm->Length();
cBytes = 0;
}
}
if (cBytes)
{
m_pTrack->OldIndex(posChunk, cBytes);
}
return S_OK;
}
// Remember that large H264 samples may be broken
// across several buffers, with Sync flag at start and
// time on last buffer.
bool bSync = false;
long cBytes = 0;
long nSamples = 0;
// loop once through the samples writing the data
list<IMediaSample*>::iterator it;
for (it = m_Samples.begin(); it != m_Samples.end(); it++)
{
IMediaSample* pSample = *it;
// record positive sync flag, but for
// multiple-buffer samples, only one sync flag will be present
// so don't overwrite with later negatives.
if (pSample->IsSyncPoint() == S_OK)
{
bSync = true;
}
// write payload, including any transformation (eg BSF to length-prepended)
BYTE* pBuffer;
pSample->GetPointer(&pBuffer);
int cActual = 0;
m_pTrack->Handler()->WriteData(patm, pBuffer, pSample->GetActualDataLength(), &cActual);
cBytes += cActual;
REFERENCE_TIME tStart, tEnd;
HRESULT hr = pSample->GetTime(&tStart, &tEnd);
if (SUCCEEDED(hr))
{
// this is the last buffer in the sample
m_pTrack->IndexSample(bSync, tStart, tEnd, cBytes);
// reset for new sample
bSync = false;
cBytes = 0;
nSamples++;
}
}
// add chunk position to index
m_pTrack->IndexChunk(posChunk, nSamples);
return S_OK;
}
HRESULT CAudioPin::DoBufferProcessingLoop(void)
{
if (!m_bConnected)
{
return S_OK;
m_bThreadRunning = false;
}
Command com;
OnThreadStartPlay();
m_bThreadRunning = true;
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_NORMAL);
do
{
while (!CheckRequest(&com))
{
IMediaSample *pSample;
HRESULT hr = GetDeliveryBuffer(&pSample,NULL,NULL,0);
if (FAILED(hr))
{
Sleep(1);
continue; // go round again. Perhaps the error will go away
// or the allocator is decommited & we will be asked to
// exit soon.
}
// Virtual function user will override.
hr = FillBuffer(pSample);
if (hr == S_OK)
{
// Some decoders seem to crash when we provide empty samples
if ((pSample->GetActualDataLength() > 0) && !m_pTsReaderFilter->IsStopping() && m_bConnected)
{
hr = Deliver(pSample);
m_sampleCount++ ;
}
else
{
m_bDiscontinuity = true;
}
pSample->Release();
// downstream filter returns S_FALSE if it wants us to
// stop or an error if it's reporting an error.
if(hr != S_OK)
{
DbgLog((LOG_TRACE, 2, TEXT("Deliver() returned %08x; stopping"), hr));
m_bThreadRunning = false;
return S_OK;
}
}
else if (hr == S_FALSE)
{
// derived class wants us to stop pushing data
pSample->Release();
DeliverEndOfStream();
m_bThreadRunning = false;
return S_OK;
}
else
{
// derived class encountered an error
pSample->Release();
DbgLog((LOG_ERROR, 1, TEXT("Error %08lX from FillBuffer!!!"), hr));
DeliverEndOfStream();
m_pFilter->NotifyEvent(EC_ERRORABORT, hr, 0);
m_bThreadRunning = false;
return hr;
}
// all paths release the sample
}
// For all commands sent to us there must be a Reply call!
if (com == CMD_RUN || com == CMD_PAUSE)
{
Reply(NOERROR);
}
else if (com != CMD_STOP)
{
Reply((DWORD) E_UNEXPECTED);
DbgLog((LOG_ERROR, 1, TEXT("Unexpected command!!!")));
}
} while (com != CMD_STOP);
m_bThreadRunning = false;
return S_FALSE;
}
DWORD WINAPI UdpReceiveThread(LPVOID param)
{
HRESULT hr;
ReceiveParam *receiveParam = (ReceiveParam*)param;
HANDLE PushSemaphore = receiveParam->PushSemaphore;
HANDLE PushDataMutex = receiveParam->PushDataMutex;
std::map<REFERENCE_TIME,IMediaSample*>& SampleList = *receiveParam->SampleList;
NetReceiveFilter* filter = receiveParam->filter;
delete receiveParam;
NetReceiveOutputPin* outputPin = reinterpret_cast<NetReceiveOutputPin*>(filter->GetPin(0));
assert(outputPin != NULL);
AM_MEDIA_TYPE mediaType;
while (true)
{
outputPin->ConnectionMediaType(&mediaType);
if (mediaType.majortype == GUID_NULL)
{
Sleep(300);
}
else
break;
}
SOCKET udpSocket;
udpSocket = ::socket(AF_INET, SOCK_DGRAM, 0);
if (udpSocket == INVALID_SOCKET)
{
ErrorPrint("Create udp socket error");
return 1;
}
sockaddr_in bindAddress;
bindAddress.sin_family = AF_INET;
bindAddress.sin_addr.s_addr = htonl(INADDR_ANY);
if(mediaType.majortype == MEDIATYPE_Video)
{
bindAddress.sin_port = htons(VideoBroadcastPort);
}
else
{
bindAddress.sin_port = htons(AudioBroadcastPort);
}
int option = 1;
int ret = setsockopt(udpSocket, SOL_SOCKET, SO_REUSEADDR, (char*)&option, sizeof(option));
if (ret == SOCKET_ERROR)
{
ErrorPrint("Set socket reuse address error");
return 1;
}
int recvSystemBufferSize = 1024 * 1024 * 10;
ret = setsockopt(udpSocket, SOL_SOCKET, SO_RCVBUF, (char*)&recvSystemBufferSize, sizeof(recvSystemBufferSize));
if (ret == SOCKET_ERROR)
{
ErrorPrint("Set socket receive system buffer size error");
}
ret = ::bind(udpSocket, (sockaddr*)&bindAddress, sizeof(bindAddress));
if(ret == SOCKET_ERROR)
{
ErrorPrint("Bind udp receive socket error");
return 1;
}
sockaddr_in fromAddress;
fromAddress.sin_family = AF_INET;
int addressLen = sizeof(fromAddress);
std::map<long long, IMediaSample*> idToSampleMap;
const int packetMaxSize = 10 * 1024;
MediaPacketHeader* mediaPacketHeader = (MediaPacketHeader*)new char[sizeof(MediaPacketHeader) + packetMaxSize];
boost::scoped_array<char> bufferContainer((char*)mediaPacketHeader);
char* dataStart = (char*)mediaPacketHeader;
char* dataBuffer = (char*)mediaPacketHeader + sizeof(MediaPacketHeader);
while (true)
{
int recvedSize = recvfrom(udpSocket, dataStart, sizeof(MediaPacketHeader) + packetMaxSize, 0, (sockaddr*)&fromAddress, &addressLen);
if (recvedSize == SOCKET_ERROR)
{
ErrorPrint("Receive from udp error");
return 1;
}
if (g_IsBroadcasting) //是自己广播的数据包，丢弃之
{
continue;
}
if (mediaPacketHeader->type == 0) // 是sample头
{
#ifdef UDP_PRINT
std::cout<<"Receive media packet header:"<<mediaPacketHeader->id<<std::endl;
#endif
std::map<long long, IMediaSample*>::iterator it = idToSampleMap.begin();
while (it != idToSampleMap.end()) //处理发生过丢包的sample
{
std::map<long long, IMediaSample*>::iterator tmp = it++;
if (tmp->first < mediaPacketHeader->id) //这个sample肯定丢包了，序列号比后来的小，并且没有接受完整，直接丢弃掉
{
std::cout<<"Lose packet:"<<mediaPacketHeader->id<<std::endl;
tmp->second->Release(); //一定要把sample给释放掉
idToSampleMap.erase(tmp);
}
else //将所有要丢弃的包都处理完了
break;
}
// if (mediaType.majortype == MEDIATYPE_Video)
// {
// std::cout<<"Video header:"<<mediaPacketHeader->id<<std::endl;
// }
// std::cout<<"Before get free sample"<<std::endl;
IMediaSample *sample = filter->GetFreeSample(); //此时为这个sample头申请一个新的sample
// std::cout<<"After get free sample"<<std::endl;
if (sample == NULL)
{
ErrorPrint("Get free sample error");
return 1;
}
AM_SAMPLE2_PROPERTIES* sample2Properties = (AM_SAMPLE2_PROPERTIES*)dataBuffer;
sample2Properties->cbData = sizeof(AM_SAMPLE2_PROPERTIES) - 9;
IMediaSample2 *mediaSample2;
hr = sample->QueryInterface(IID_IMediaSample2, (void**)&mediaSample2);
if (FAILED(hr))
{
ErrorPrint("Get media sample2 interface error",hr);
sample->Release();
return 1;
}
ComReleaser mediaSample2Releaser(mediaSample2);
hr = mediaSample2->SetProperties(sample2Properties->cbData, (BYTE*)sample2Properties);//设置sample属性
if (FAILED(hr))
{
ErrorPrint("Set sample properties error");
}
sample->SetTime(&(sample2Properties->tStart), &(sample2Properties->tStop));
sample->SetActualDataLength(sample2Properties->lActual);
idToSampleMap.insert(std::make_pair(mediaPacketHeader->id, sample)); //插入到map当中，等待所有的sample数据接受完
}
else if (mediaPacketHeader->type == 1) //是sample数据
{
#ifdef UDP_PRINT
std::cout<<"Receive sample data:"<<mediaPacketHeader->id<<std::endl;
#endif
std::map<long long, IMediaSample*>::iterator it = idToSampleMap.find(mediaPacketHeader->id);
if (it != idToSampleMap.end()) //如果id找不到，sample头丢失了，或者已经过期了，直接将该包丢弃
{
IMediaSample* sample = it->second;
PBYTE dataPointer = NULL;
hr = sample->GetPointer(&dataPointer);
if (FAILED(hr))
{
ErrorPrint("Get data pointer error",hr);
idToSampleMap.erase(it);
sample->Release();
continue;
}
memcpy(dataPointer + mediaPacketHeader->offset, dataBuffer, mediaPacketHeader->size);
if ( (mediaPacketHeader->offset + mediaPacketHeader->size) == sample->GetActualDataLength()) //已经接收完整了，当然也有可能中间数据丢包了，但现在不管这种情况
{
idToSampleMap.erase(it);
REFERENCE_TIME startTime,endTime;
sample->GetTime(&startTime,&endTime);
//通知PUSH线程进行数据传送
WaitForSingleObject(PushDataMutex, INFINITE);
// if (mediaType.majortype == MEDIATYPE_Video)
// {
// std::cout<<"Finished Video sample:"<<mediaPacketHeader->id<<";Current Thread:"<<GetCurrentThreadId()<<";Map size:"<<idToSampleMap.size()<<std::endl;
// std::cout<<"Sample start time:"<<startTime <<";Sample end time:"<<endTime<<std::endl;
// }
SampleList.insert(std::make_pair(startTime,sample));
if (SampleList.size() >= 24 * 10)
{
ReleaseSemaphore(PushSemaphore, 1, NULL);
}
ReleaseMutex(PushDataMutex);
}
}
else
std::cout<<"Lose packet header:"<<mediaPacketHeader->id<<std::endl;
}
// if(idToSampleMap.size() == 0 || idToSampleMap.begin()->first < )
//
// mediaPacketHeader
//
}
}
