File: XnFrameBufferManager.cpp

package info (click to toggle)
openni-sensor-pointclouds 5.1.0.41.11-1
  • links: PTS, VCS
  • area: main
  • in suites: sid, trixie
  • size: 4,656 kB
  • sloc: cpp: 34,881; ansic: 14,901; sh: 249; python: 155; makefile: 93; xml: 8
file content (200 lines) | stat: -rw-r--r-- 5,891 bytes parent folder | download | duplicates (12)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/****************************************************************************
*                                                                           *
*  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 "XnFrameBufferManager.h"
#include <XnLog.h>
#include <XnDDK.h>

//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
XnFrameBufferManager::XnFrameBufferManager(XnBufferPool* pBufferPool) :
	m_pBufferPool(pBufferPool),
	m_pWorkingBuffer(NULL),
	m_pStableBuffer(NULL),
	m_nStableFrameID(0),
	m_nStableTimestamp(0),
	m_hLock(NULL)
{
}

XnFrameBufferManager::~XnFrameBufferManager()
{
	Free();
}

XnStatus XnFrameBufferManager::Init(XnUInt32 nBufferSize)
{
	XnStatus nRetVal = XN_STATUS_OK;

	nRetVal = xnOSCreateCriticalSection(&m_hLock);
	XN_IS_STATUS_OK(nRetVal);

	nRetVal = m_pBufferPool->Init(nBufferSize);
	XN_IS_STATUS_OK(nRetVal);

	nRetVal = Reallocate(nBufferSize);
	XN_IS_STATUS_OK(nRetVal);

	return (XN_STATUS_OK);
}

void XnFrameBufferManager::Free()
{
	if (m_hLock != NULL)
	{
		xnOSCloseCriticalSection(&m_hLock);
		m_hLock = NULL;
	}
}

XnStatus XnFrameBufferManager::Reallocate(XnUInt32 nBufferSize)
{
	XnStatus nRetVal = XN_STATUS_OK;

	xnOSEnterCriticalSection(&m_hLock);

	nRetVal = m_pBufferPool->ChangeBufferSize(nBufferSize);
	if (nRetVal != XN_STATUS_OK)
	{
		xnOSLeaveCriticalSection(&m_hLock);
		return (nRetVal);
	}

	// release current ones
	if (m_pWorkingBuffer != NULL)
	{
		m_pBufferPool->DecRef(m_pWorkingBuffer);
	}

	if (m_pStableBuffer != NULL)
	{
		m_pBufferPool->DecRef(m_pStableBuffer);
	}

	// and take one
	if (nBufferSize == 0)
	{
		m_pWorkingBuffer = NULL;
		m_pStableBuffer = NULL;
	}
	else
	{
		// take working buffer
		nRetVal = m_pBufferPool->GetBuffer(&m_pWorkingBuffer);
		XN_IS_STATUS_OK(nRetVal);
	}

	xnOSLeaveCriticalSection(&m_hLock);

	return (XN_STATUS_OK);
}

void XnFrameBufferManager::MarkWriteBufferAsStable(XnUInt64 nTimestamp, XnUInt32* pnFrameID)
{
	xnOSEnterCriticalSection(&m_hLock);

	// lock buffer pool (for rollback option)
	m_pBufferPool->Lock();

	XnBuffer* pPrevStable = m_pStableBuffer;

	// release previous stable
	if (m_pStableBuffer != NULL)
	{
		m_pBufferPool->DecRef(m_pStableBuffer);
	}

	// mark working as stable
	m_nStableFrameID++;
	m_nStableTimestamp = nTimestamp;
	*pnFrameID = m_nStableFrameID;

	m_pStableBuffer = m_pWorkingBuffer; // no need to add ref, working buffer will be replaced in a moment

	// take a new working buffer
	XnStatus nRetVal = m_pBufferPool->GetBuffer(&m_pWorkingBuffer);
	if (nRetVal != XN_STATUS_OK)
	{
		xnLogError(XN_MASK_DDK, "Failed to get new working buffer!");
		// we'll return back to our old working one
		m_pWorkingBuffer->Reset();

		m_pStableBuffer = pPrevStable;
		m_pBufferPool->AddRef(m_pStableBuffer);
		m_pBufferPool->Unlock();
		return;
	}

	m_pBufferPool->Unlock();
	xnOSLeaveCriticalSection(&m_hLock);

	// reset new working
	m_pWorkingBuffer->Reset();

	// notify stream that new data is available
	m_NewFrameEvent.Raise(this, m_nStableTimestamp);
}

void XnFrameBufferManager::ReadLastStableBuffer(XnBuffer** ppBuffer, XnUInt64* pnTimestamp, XnUInt32* pnFrameID)
{
	xnOSEnterCriticalSection(&m_hLock);

	// take a pointer to stable one
	*ppBuffer = m_pStableBuffer;
	// and add ref to it (so it wouldn't be deleted)
	if (m_pStableBuffer != NULL)
	{
		m_pBufferPool->AddRef(m_pStableBuffer);
	}

	// take props
	*pnTimestamp = m_nStableTimestamp;
	*pnFrameID = m_nStableFrameID;

	xnOSLeaveCriticalSection(&m_hLock);
}

XnStatus XnFrameBufferManager::CopyLastStableBuffer(void* pDest, XnUInt32 nDestSize, XnUInt32* pnWritten)
{
	// do this inside a lock (so we won't erase memory during copy)
	xnOSEnterCriticalSection(&m_hLock);

	// check size
	if (nDestSize < m_pStableBuffer->GetSize())
	{
		xnOSLeaveCriticalSection(&m_hLock);
		return (XN_STATUS_OUTPUT_BUFFER_OVERFLOW);
	}

	// copy
	m_pStableBuffer->UnsafeCopy(pDest);
	*pnWritten = m_pStableBuffer->GetSize();

	xnOSLeaveCriticalSection(&m_hLock);

	return XN_STATUS_OK;
}