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/****************************************************************************
* *
* PrimeSense Sensor 5.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of PrimeSense Sensor. *
* *
* PrimeSense Sensor is free software: you can redistribute it and/or modify*
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* PrimeSense Sensor is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with PrimeSense Sensor. If not, see <http://www.gnu.org/licenses/>.*
* *
****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include "XnSensorClientStream.h"
#include "XnSensorClient.h"
#include <XnDDK/XnStreamDataInternal.h>
//---------------------------------------------------------------------------
// Client Stream
//---------------------------------------------------------------------------
XnSensorClientStream::XnSensorClientStream(XnSensorClient* pClient, const XnChar* strType, const XnChar* strName) :
XnStreamReaderStream(strType, strName),
m_pClient(pClient),
m_hSharedMemory(NULL),
m_pSharedMemory(NULL)
{}
XnSensorClientStream::~XnSensorClientStream()
{
XnSensorClientStream::Free();
}
XnStatus XnSensorClientStream::OpenSharedMemory()
{
XnStatus nRetVal = XN_STATUS_OK;
if (m_hSharedMemory != NULL)
{
xnOSCloseSharedMemory(m_hSharedMemory);
m_hSharedMemory = NULL;
m_pSharedMemory = NULL;
}
XnChar strSharedMemoryName[XN_DEVICE_MAX_STRING_LENGTH];
nRetVal = GetProperty(XN_STREAM_PROPERTY_SHARED_BUFFER_NAME, strSharedMemoryName);
XN_IS_STATUS_OK(nRetVal);
nRetVal = xnOSOpenSharedMemoryEx(strSharedMemoryName, XN_OS_FILE_READ, m_pClient->IsServerFromOtherUserAllowed(), &m_hSharedMemory);
XN_IS_STATUS_OK(nRetVal);
nRetVal = xnOSSharedMemoryGetAddress(m_hSharedMemory, (void**)&m_pSharedMemory);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnSensorClientStream::Open()
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = m_pClient->m_pOutgoingPacker->WriteCustomData(XN_SENSOR_SERVER_MESSAGE_OPEN_STREAM, GetName(), (XnUInt32)strlen(GetName()) + 1);
XN_IS_STATUS_OK(nRetVal);
// wait for reply
nRetVal = m_pClient->WaitForReply(XN_SENSOR_SERVER_MESSAGE_GENERAL_OP_RESPOND);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnStreamReaderStream::Open();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnSensorClientStream::Close()
{
XnStatus nRetVal = XN_STATUS_OK;
// read data from server
nRetVal = m_pClient->m_pOutgoingPacker->WriteCustomData(XN_SENSOR_SERVER_MESSAGE_CLOSE_STREAM, GetName(), (XnUInt32)strlen(GetName()) + 1);
XN_IS_STATUS_OK(nRetVal);
// wait for reply
nRetVal = m_pClient->WaitForReply(XN_SENSOR_SERVER_MESSAGE_GENERAL_OP_RESPOND);
XN_IS_STATUS_OK(nRetVal);
nRetVal = XnStreamReaderStream::Close();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnSensorClientStream::Free()
{
if (m_hSharedMemory != NULL)
{
xnOSCloseSharedMemory(m_hSharedMemory);
m_hSharedMemory = NULL;
m_pSharedMemory = NULL;
}
return (XN_STATUS_OK);
}
//---------------------------------------------------------------------------
// Client Frame Stream
//---------------------------------------------------------------------------
XnSensorClientFrameStream::XnSensorClientFrameStream(XnSensorClient* pClient, const XnChar* strType, const XnChar* strName) :
XnSensorClientStream(pClient, strType, strName),
m_nFrameID(0)
{}
XnSensorClientFrameStream::~XnSensorClientFrameStream()
{
}
XnStatus XnSensorClientFrameStream::ReadImpl(XnStreamData* pStreamOutput)
{
XnStatus nRetVal = XN_STATUS_OK;
// read data from server
nRetVal = m_pClient->m_pOutgoingPacker->WriteCustomData(XN_SENSOR_SERVER_MESSAGE_READ_STREAM, pStreamOutput->StreamName, (XnUInt32)strlen(pStreamOutput->StreamName) + 1);
XN_IS_STATUS_OK(nRetVal);
// wait for reply
nRetVal = m_pClient->WaitForReply(XN_SENSOR_SERVER_MESSAGE_READ_STREAM);
XN_IS_STATUS_OK(nRetVal);
++m_nFrameID;
XnSensorServerReadReply* pReply = (XnSensorServerReadReply*)m_pClient->m_LastReply.pData;
pStreamOutput->nFrameID = m_nFrameID;
pStreamOutput->nTimestamp = pReply->nTimestamp;
pStreamOutput->pData = (m_pSharedMemory + pReply->nOffset);
pStreamOutput->nDataSize = pReply->nDataSize;
return (XN_STATUS_OK);
}
XnStatus XnSensorClientFrameStream::CreateStreamData(XnStreamData** ppStreamData)
{
XnStatus nRetVal = XN_STATUS_OK;
XnStreamData* pStreamData;
// we create a StreamData object with no buffer allocated. The buffer will just be
// a pointer to the triple buffer
nRetVal = XnStreamDataCreateNoBuffer(&pStreamData, GetName());
XN_IS_STATUS_OK(nRetVal);
pStreamData->pData = m_pSharedMemory;
*ppStreamData = pStreamData;
return (XN_STATUS_OK);
}
//---------------------------------------------------------------------------
// Client Audio Stream
//---------------------------------------------------------------------------
XnSensorClientAudioStream::XnSensorClientAudioStream(XnSensorClient* pClient, const XnChar* strType, const XnChar* strName) :
XnSensorClientStream(pClient, strType, strName),
m_pHeader(NULL),
m_pBuffer(NULL),
m_nLastReadIndex(0),
m_hLock(NULL),
m_nFrameID(0),
m_pTimestamps(NULL)
{}
XnSensorClientAudioStream::~XnSensorClientAudioStream()
{}
XnStatus XnSensorClientAudioStream::Init()
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = XnSensorClientStream::Init();
XN_IS_STATUS_OK(nRetVal);
nRetVal = xnOSCreateCriticalSection(&m_hLock);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnSensorClientAudioStream::Free()
{
XnStatus nRetVal = XN_STATUS_OK;
if (m_hLock != NULL)
{
xnOSCloseCriticalSection(&m_hLock);
m_hLock = NULL;
}
nRetVal = XnSensorClientStream::Free();
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnSensorClientAudioStream::OpenSharedMemory()
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = XnSensorClientStream::OpenSharedMemory();
XN_IS_STATUS_OK(nRetVal);
m_pHeader = (XnAudioSharedBuffer*)m_pSharedMemory;
m_pBuffer = m_pSharedMemory + m_pHeader->nBufferOffset;
m_pTimestamps = (XnUInt64*)(m_pSharedMemory + m_pHeader->nTimestampsListOffset);
return (XN_STATUS_OK);
}
void XnSensorClientAudioStream::NewDataAvailable(XnUInt64 /*nTimestamp*/, XnUInt32 /*nFrameID*/)
{
// if a read is in progress, wait for it to complete
XnAutoCSLocker locker(m_hLock);
// check if we still have new data
if (m_pHeader->nWritePacketIndex != m_nLastReadIndex)
{
XnSensorClientStream::NewDataAvailable(m_pTimestamps[m_nLastReadIndex], 0);
}
}
XnStatus XnSensorClientAudioStream::ReadImpl(XnStreamData* pStreamOutput)
{
pStreamOutput->nDataSize = 0;
// take last write index (note: this is taken from shared memory)
XnAutoCSLocker locker(m_hLock);
XnUInt32 nWriteIndex = m_pHeader->nWritePacketIndex;
// check how many buffers we have
XnInt32 nAvailbalePackets = nWriteIndex - m_nLastReadIndex;
if (nAvailbalePackets < 0)
nAvailbalePackets += m_pHeader->nPacketCount;
// make sure we have enough space
while (GetRequiredDataSize() < (XnUInt32)nAvailbalePackets * m_pHeader->nPacketSize)
{
m_nLastReadIndex = (m_nLastReadIndex + 1) % m_pHeader->nPacketCount;
nAvailbalePackets--;
}
// take timestamp
pStreamOutput->nTimestamp = m_pTimestamps[m_nLastReadIndex];
// now copy data from last read position to this one
XnUChar* pAudioBuf = (XnUChar*)pStreamOutput->pData;
// copy
while (m_nLastReadIndex != nWriteIndex)
{
XN_ASSERT(pStreamOutput->nDataSize < GetRequiredDataSize());
XnUChar* pPacketData = m_pBuffer + (m_nLastReadIndex * m_pHeader->nPacketSize);
xnOSMemCopy(pAudioBuf, pPacketData, m_pHeader->nPacketSize);
pAudioBuf += m_pHeader->nPacketSize;
pStreamOutput->nDataSize += m_pHeader->nPacketSize;
m_nLastReadIndex = (m_nLastReadIndex + 1) % m_pHeader->nPacketCount;
}
m_nFrameID++;
pStreamOutput->nFrameID = m_nFrameID;
return (XN_STATUS_OK);
}
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