src/lib/AdapterCommunication.h

   1 #pragma once
   2 /*
   3  * This file is part of the libCEC(R) library.
   4  *
   5  * libCEC(R) is Copyright (C) 2011 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 <cectypes.h>
  35 #include "platform/threads.h"
  36 #include "util/buffer.h"
  37 #include "util/StdString.h"
  38 #include <string>
  39 #include <boost/enable_shared_from_this.hpp>
  40 #include <boost/shared_ptr.hpp>
  41
  42 namespace CEC
  43 {
  44   typedef enum cec_adapter_message_state
  45   {
  46     ADAPTER_MESSAGE_STATE_UNKNOWN = 0,
  47     ADAPTER_MESSAGE_STATE_WAITING,
  48     ADAPTER_MESSAGE_STATE_SENT,
  49     ADAPTER_MESSAGE_STATE_RECEIVED,
  50     ADAPTER_MESSAGE_STATE_ERROR
  51   } cec_adapter_message_state;
  52
  53
  54   class CCECAdapterMessage : public boost::enable_shared_from_this<CCECAdapterMessage>
  55   {
  56   public:
  57     CCECAdapterMessage(void) { clear(); }
  58     CCECAdapterMessage(const cec_command &command);
  59     CCECAdapterMessage &operator =(const CCECAdapterMessage &msg);
  60     CStdString ToString(void) const;
  61     CStdString MessageCodeAsString(void) const;
  62
  63     bool                    empty(void) const             { return packet.empty(); }
  64     uint8_t                 operator[](uint8_t pos) const { return packet[pos]; }
  65     uint8_t                 at(uint8_t pos) const         { return packet[pos]; }
  66     uint8_t                 size(void) const              { return packet.size; }
  67     void                    clear(void)                   { state = ADAPTER_MESSAGE_STATE_UNKNOWN; transmit_timeout = 0; packet.clear(); }
  68     void                    shift(uint8_t iShiftBy)       { packet.shift(iShiftBy); }
  69     void                    push_back(uint8_t add)        { packet.push_back(add); }
  70     cec_adapter_messagecode message(void) const           { return packet.size >= 1 ? (cec_adapter_messagecode) (packet.at(0) & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK))  : MSGCODE_NOTHING; }
  71     bool                    eom(void) const               { return packet.size >= 1 ? (packet.at(0) & MSGCODE_FRAME_EOM) != 0 : false; }
  72     bool                    ack(void) const               { return packet.size >= 1 ? (packet.at(0) & MSGCODE_FRAME_ACK) != 0 : false; }
  73     cec_logical_address     initiator(void) const         { return packet.size >= 2 ? (cec_logical_address) (packet.at(1) >> 4)  : CECDEVICE_UNKNOWN; };
  74     cec_logical_address     destination(void) const       { return packet.size >= 2 ? (cec_logical_address) (packet.at(1) & 0xF) : CECDEVICE_UNKNOWN; };
  75     bool                    is_error(void) const;
  76     void                    push_escaped(int16_t byte);
  77
  78     cec_datapacket            packet;
  79     cec_adapter_message_state state;
  80     int32_t                   transmit_timeout;
  81     CMutex                    mutex;
  82     CCondition                condition;
  83   };
  84   typedef boost::shared_ptr<CCECAdapterMessage> CCECAdapterMessagePtr;
  85
  86   class CSerialPort;
  87   class CLibCEC;
  88
  89   class CAdapterCommunication : private CThread
  90   {
  91   public:
  92     CAdapterCommunication(CLibCEC *controller);
  93     virtual ~CAdapterCommunication();
  94
  95     bool Open(const char *strPort, uint16_t iBaudRate = 38400, uint32_t iTimeoutMs = 10000);
  96     bool Read(CCECAdapterMessage &msg, uint32_t iTimeout = 1000);
  97     bool Write(CCECAdapterMessagePtr data);
  98     bool PingAdapter(void);
  99     void Close(void);
 100     bool IsOpen(void) const;
 101     std::string GetError(void) const;
 102
 103     void *Process(void);
 104
 105     bool StartBootloader(void);
 106
 107   private:
 108     void WriteNextCommand(void);
 109     void AddData(uint8_t *data, uint8_t iLen);
 110     bool ReadFromDevice(uint32_t iTimeout);
 111
 112     CSerialPort *                    m_port;
 113     CLibCEC *                        m_controller;
 114     CecBuffer<uint8_t>               m_inBuffer;
 115     CecBuffer<CCECAdapterMessagePtr> m_outBuffer;
 116     CMutex                           m_mutex;
 117     CCondition                       m_rcvCondition;
 118     CCondition                       m_startCondition;
 119   };
 120 };