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/*****************************************************************************
* *
* OpenNI 2.x Alpha *
* Copyright (C) 2012 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* Licensed under the Apache License, Version 2.0 (the "License"); *
* you may not use this file except in compliance with the License. *
* You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an "AS IS" BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* *
*****************************************************************************/
#include "OniStreamFrameHolder.h"
#include "OniStream.h"
ONI_NAMESPACE_IMPLEMENTATION_BEGIN
StreamFrameHolder::StreamFrameHolder(FrameManager& frameManager, VideoStream* pStream) :
FrameHolder(frameManager), m_pStream(pStream), m_pLastFrame(NULL)
{
}
StreamFrameHolder::~StreamFrameHolder()
{
clear();
}
OniStatus StreamFrameHolder::readFrame(VideoStream* pStream, OniFrame** pFrame)
{
// Verify called with relevant stream.
if (pStream != m_pStream)
{
return ONI_STATUS_BAD_PARAMETER;
}
// Make sure frame holder is enabled.
if (!m_enabled)
{
*pFrame = NULL;
return ONI_STATUS_ERROR;
}
// If frame already exists, wait() will return immidiately.
m_pStream->waitForNewFrameEvent();
// Return the last frame and set it to NULL.
lock();
*pFrame = m_pLastFrame;
m_pLastFrame = NULL;
unlock();
return ONI_STATUS_OK;
}
OniStatus StreamFrameHolder::processNewFrame(VideoStream* pStream, OniFrame* pFrame)
{
// Verify called with relevant stream.
if (pStream != m_pStream)
{
return ONI_STATUS_BAD_PARAMETER;
}
// Make sure frame holder is enabled.
if (!m_enabled)
{
return ONI_STATUS_OK;
}
// Release the last stored frame and store received frame.
lock();
if (m_pLastFrame != NULL)
{
m_frameManager.release(m_pLastFrame);
}
m_pLastFrame = pFrame;
m_frameManager.addRef(m_pLastFrame);
unlock();
// Raise the new frame event.
m_pStream->raiseNewFrameEvent();
return ONI_STATUS_OK;
}
OniFrame* StreamFrameHolder::peekFrame(VideoStream* pStream)
{
// Verify called with relevant stream.
if (pStream != m_pStream)
{
return NULL;
}
// Make sure frame holder is enabled.
if (!m_enabled)
{
return NULL;
}
return m_pLastFrame;
}
// Clear all the frame in the holder.
void StreamFrameHolder::clear()
{
// Release the last stored frame.
lock();
if (m_pLastFrame != NULL)
{
m_frameManager.release(m_pLastFrame);
}
m_pLastFrame = NULL;
unlock();
}
// Return list of streams which are members of the stream group.
void StreamFrameHolder::getStreams(VideoStream** ppStreams, int* pNumStreams)
{
*pNumStreams = 1;
*ppStreams = m_pStream;
}
// Return number of streams which are members of the stream group.
int StreamFrameHolder::getNumStreams()
{
return 1;
}
void StreamFrameHolder::setStreamEnabled(VideoStream* pStream, OniBool enabled)
{
if (pStream != m_pStream)
return;
if (enabled == FALSE)
{
clear();
}
}
ONI_NAMESPACE_IMPLEMENTATION_END
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