src/lib/adapter/USBCECAdapterCommunication.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/threads.h"
  36 #include "../platform/util/buffer.h"
  37 #include "AdapterCommunication.h"
  38 #include "USBCECAdapterMessage.h"
  39
  40 namespace PLATFORM
  41 {
  42   class ISocket;
  43 }
  44
  45 namespace CEC
  46 {
  47   class CCECProcessor;
  48   class CAdapterPingThread;
  49   class CUSBCECAdapterCommands;
  50   class CCECAdapterMessageQueue;
  51
  52   class CUSBCECAdapterCommunication : public IAdapterCommunication, public PLATFORM::CThread
  53   {
  54     friend class CUSBCECAdapterCommands;
  55     friend class CCECAdapterMessageQueue;
  56
  57   public:
  58     /*!
  59      * @brief Create a new USB-CEC communication handler.
  60      * @param callback The callback to use for incoming CEC commands.
  61      * @param strPort The name of the com port to use.
  62      * @param iBaudRate The baudrate to use on the com port connection.
  63      */
  64     CUSBCECAdapterCommunication(IAdapterCommunicationCallback *callback, const char *strPort, uint16_t iBaudRate = 38400);
  65     virtual ~CUSBCECAdapterCommunication(void);
  66
  67     /** @name IAdapterCommunication implementation */
  68     ///{
  69     bool Open(uint32_t iTimeoutMs = 10000, bool bSkipChecks = false, bool bStartListening = true);
  70     void Close(void);
  71     bool IsOpen(void);
  72     CStdString GetError(void) const;
  73     cec_adapter_message_state Write(const cec_command &data, bool &bRetry, uint8_t iLineTimeout = 3);
  74
  75     bool StartBootloader(void);
  76     bool SetAckMask(uint16_t iMask);
  77     bool PingAdapter(void);
  78     uint16_t GetFirmwareVersion(void);
  79     bool PersistConfiguration(libcec_configuration *configuration);
  80     bool GetConfiguration(libcec_configuration *configuration);
  81     CStdString GetPortName(void);
  82     uint16_t GetPhysicalAddress(void) { return 0; }
  83     bool SetControlledMode(bool controlled);
  84     ///}
  85
  86     void *Process(void);
  87
  88   private:
  89     /*!
  90      * @brief Clear all input bytes.
  91      * @param iTimeout Timeout when anything was received.
  92      */
  93     void ClearInputBytes(uint32_t iTimeout = 1000);
  94
  95     /*!
  96      * @brief Change the current CEC line timeout.
  97      * @param iTimeout The new timeout.
  98      * @return True when acked by the controller, false otherwise.
  99      */
 100     bool SetLineTimeout(uint8_t iTimeout);
 101
 102     /*!
 103      * @brief Send a command to the controller and wait for an ack.
 104      * @param msgCode The command to send.
 105      * @param params The parameters to the command.
 106      * @param bIsRetry True when this command is being retried, false otherwise.
 107      * @return The message. Delete when done with it.
 108      */
 109     CCECAdapterMessage *SendCommand(cec_adapter_messagecode msgCode, CCECAdapterMessage &params, bool bIsRetry = false);
 110
 111     /*!
 112      * @brief Change the "initialised" status.
 113      * @param bSetTo The new value.
 114      */
 115     void SetInitialised(bool bSetTo = true);
 116
 117     /*!
 118      * @return True when initialised, false otherwise.
 119      */
 120     bool IsInitialised(void);
 121
 122     /*!
 123      * @brief Pings the adapter, checks the firmware version and sets controlled mode.
 124      * @param iTimeoutMs The timeout after which this fails if no proper data was received.
 125      * @return True when the checks passed, false otherwise.
 126      */
 127     bool CheckAdapter(uint32_t iTimeoutMs = 10000);
 128
 129     /*!
 130      * @brief Handle a poll message inside the adapter message (checks if one is present).
 131      * @param msg The adapter message to parse.
 132      * @return True when the message resulted in a CEC error, false otherwise.
 133      */
 134     bool HandlePoll(const CCECAdapterMessage &msg);
 135
 136     /*!
 137      * @brief Read data from the device.
 138      * @param iTimeout The read timeout to use.
 139      * @param iSize The maximum read size.
 140      * @return True when something was read, false otherwise.
 141      */
 142     bool ReadFromDevice(uint32_t iTimeout, size_t iSize = 256);
 143
 144     /*!
 145      * @brief Writes a message to the serial port.
 146      * @param message The message to write.
 147      * @return True when written, false otherwise.
 148      */
 149     bool WriteToDevice(CCECAdapterMessage *message);
 150
 151     /*!
 152      * @brief Called before sending a CEC command over the line, so we know we're expecting an ack.
 153      * @param dest The destination of the CEC command.
 154      */
 155     void MarkAsWaiting(const cec_logical_address dest);
 156
 157     PLATFORM::ISocket *                          m_port;                 /**< the com port connection */
 158     PLATFORM::CMutex                             m_mutex;                /**< mutex for changes in this class */
 159     uint8_t                                      m_iLineTimeout;         /**< the current line timeout on the CEC line */
 160     cec_logical_address                          m_lastPollDestination;  /**< the destination of the last poll message that was received */
 161     bool                                         m_bInitialised;         /**< true when the connection is initialised, false otherwise */
 162     bool                                         m_bWaitingForAck[15];   /**< array in which we store from which devices we're expecting acks */
 163     CAdapterPingThread *                         m_pingThread;           /**< ping thread, that pings the adapter every 15 seconds */
 164     CUSBCECAdapterCommands *                     m_commands;             /**< commands that can be sent to the adapter */
 165     CCECAdapterMessageQueue *                    m_adapterMessageQueue;  /**< the incoming and outgoing message queue */
 166   };
 167
 168   class CAdapterPingThread : public PLATFORM::CThread
 169   {
 170   public:
 171     CAdapterPingThread(CUSBCECAdapterCommunication *com, uint32_t iTimeout) :
 172         m_com(com),
 173         m_timeout(iTimeout){}
 174     virtual ~CAdapterPingThread(void) {}
 175
 176     virtual void* Process(void);
 177   private:
 178     CUSBCECAdapterCommunication *m_com;
 179     PLATFORM::CTimeout           m_timeout;
 180   };
 181 };