cec: fixed - ensure that the correct libCEC version is set after initialising the...
[deb_libcec.git] / src / lib / CECInputBuffer.h
1 #pragma once
2 /*
3 * This file is part of the libCEC(R) library.
4 *
5 * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited. All rights reserved.
6 * libCEC(R) is an original work, containing original code.
7 *
8 * libCEC(R) is a trademark of Pulse-Eight Limited.
9 *
10 * This program is dual-licensed; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 *
25 * Alternatively, you can license this library under a commercial license,
26 * please contact Pulse-Eight Licensing for more information.
27 *
28 * For more information contact:
29 * Pulse-Eight Licensing <license@pulse-eight.com>
30 * http://www.pulse-eight.com/
31 * http://www.pulse-eight.net/
32 */
33
34 #include "../../include/cectypes.h"
35 #include "platform/threads/mutex.h"
36 #include "platform/util/buffer.h"
37
38 namespace CEC
39 {
40 // a buffer that priotises the input from the TV.
41 // if we need more than this, we'll have to change it into a priority_queue
42 class CCECInputBuffer
43 {
44 public:
45 CCECInputBuffer(void) : m_bHasData(false) {}
46 virtual ~CCECInputBuffer(void)
47 {
48 m_condition.Broadcast();
49 }
50
51 bool Push(const cec_command &command)
52 {
53 bool bReturn(false);
54 PLATFORM::CLockObject lock(m_mutex);
55 if (command.initiator == CECDEVICE_TV)
56 bReturn = m_tvInBuffer.Push(command);
57 else
58 bReturn = m_inBuffer.Push(command);
59
60 m_bHasData |= bReturn;
61 if (m_bHasData)
62 m_condition.Signal();
63
64 return bReturn;
65 }
66
67 bool Pop(cec_command &command, uint16_t iTimeout)
68 {
69 bool bReturn(false);
70 PLATFORM::CLockObject lock(m_mutex);
71 if (m_tvInBuffer.IsEmpty() && m_inBuffer.IsEmpty() &&
72 !m_condition.Wait(m_mutex, m_bHasData, iTimeout))
73 return bReturn;
74
75 if (m_tvInBuffer.Pop(command))
76 bReturn = true;
77 else if (m_inBuffer.Pop(command))
78 bReturn = true;
79
80 m_bHasData = !m_tvInBuffer.IsEmpty() || !m_inBuffer.IsEmpty();
81 return bReturn;
82 }
83
84 private:
85 PLATFORM::CMutex m_mutex;
86 PLATFORM::CCondition<volatile bool> m_condition;
87 volatile bool m_bHasData;
88 PLATFORM::SyncedBuffer<cec_command> m_tvInBuffer;
89 PLATFORM::SyncedBuffer<cec_command> m_inBuffer;
90 };
91 };