src/lib/adapter/Pulse-Eight/USBCECAdapterMessage.cpp

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited.  All rights reserved.
   5  * libCEC(R) is an original work, containing original code.
   6  *
   7  * libCEC(R) is a trademark of Pulse-Eight Limited.
   8  *
   9  * This program is dual-licensed; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  *
  24  * Alternatively, you can license this library under a commercial license,
  25  * please contact Pulse-Eight Licensing for more information.
  26  *
  27  * For more information contact:
  28  * Pulse-Eight Licensing       <license@pulse-eight.com>
  29  *     http://www.pulse-eight.com/
  30  *     http://www.pulse-eight.net/
  31  */
  32
  33 #include "env.h"
  34 #include "USBCECAdapterMessage.h"
  35
  36 #include "lib/LibCEC.h"
  37 #include "lib/platform/util/StdString.h"
  38
  39 using namespace CEC;
  40 using namespace PLATFORM;
  41
  42 CCECAdapterMessage::CCECAdapterMessage(void)
  43 {
  44   Clear();
  45 }
  46
  47 CCECAdapterMessage::CCECAdapterMessage(const cec_command &command, uint8_t iLineTimeout /* = 3 */)
  48 {
  49   Clear();
  50
  51   //set ack polarity to high when transmitting to the broadcast address
  52   //set ack polarity low when transmitting to any other address
  53   PushBack(MSGSTART);
  54   PushEscaped(MSGCODE_TRANSMIT_ACK_POLARITY);
  55   if (command.destination == CECDEVICE_BROADCAST)
  56     PushEscaped(CEC_TRUE);
  57   else
  58     PushEscaped(CEC_FALSE);
  59   PushBack(MSGEND);
  60
  61   // add source and destination
  62   PushBack(MSGSTART);
  63   PushEscaped(command.opcode_set == 0 ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
  64   PushBack(((uint8_t)command.initiator << 4) + (uint8_t)command.destination);
  65   PushBack(MSGEND);
  66
  67   // add opcode
  68   if (command.opcode_set == 1)
  69   {
  70     PushBack(MSGSTART);
  71     PushEscaped(command.parameters.IsEmpty() ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
  72     PushBack((uint8_t) command.opcode);
  73     PushBack(MSGEND);
  74
  75     // add parameters
  76     for (int8_t iPtr = 0; iPtr < command.parameters.size; iPtr++)
  77     {
  78       PushBack(MSGSTART);
  79
  80       if (iPtr == command.parameters.size - 1)
  81         PushEscaped( MSGCODE_TRANSMIT_EOM);
  82       else
  83         PushEscaped(MSGCODE_TRANSMIT);
  84
  85       PushEscaped(command.parameters[iPtr]);
  86
  87       PushBack(MSGEND);
  88     }
  89   }
  90
  91   // set timeout
  92   transmit_timeout = command.transmit_timeout;
  93
  94   lineTimeout = iLineTimeout;
  95 }
  96
  97 std::string CCECAdapterMessage::ToString(void) const
  98 {
  99   CStdString strMsg;
 100   if (Size() == 0)
 101   {
 102     strMsg = "empty message";
 103   }
 104   else
 105   {
 106     strMsg = ToString(Message());
 107
 108     switch (Message())
 109     {
 110     case MSGCODE_TIMEOUT_ERROR:
 111     case MSGCODE_HIGH_ERROR:
 112     case MSGCODE_LOW_ERROR:
 113       {
 114         uint32_t iLine = (Size() >= 4) ? (At(2) << 8) | At(3) : 0;
 115         uint32_t iTime = (Size() >= 8) ? (At(4) << 24) | (At(5) << 16) | (At(6) << 8) | At(7) : 0;
 116         strMsg.AppendFormat(" line:%u", iLine);
 117         strMsg.AppendFormat(" time:%u", iTime);
 118       }
 119       break;
 120     case MSGCODE_FRAME_START:
 121       if (Size() >= 3)
 122         strMsg.AppendFormat(" initiator:%1x destination:%1x ack:%s %s", Initiator(), Destination(), IsACK() ? "high" : "low", IsEOM() ? "eom" : "");
 123       break;
 124     case MSGCODE_FRAME_DATA:
 125       if (Size() >= 3)
 126         strMsg.AppendFormat(" %02x %s", At(2), IsEOM() ? "eom" : "");
 127       break;
 128     default:
 129       if (Size() >= 2 && (Message() == MSGCODE_COMMAND_ACCEPTED || Message() == MSGCODE_COMMAND_REJECTED))
 130         strMsg.AppendFormat(": %s", ToString((cec_adapter_messagecode)At(2)));
 131       else
 132       {
 133         for (uint8_t iPtr = 2; iPtr < Size(); iPtr++)
 134           if (At(iPtr) != MSGEND)
 135             strMsg.AppendFormat(" %02x", At(iPtr));
 136       }
 137       break;
 138     }
 139   }
 140
 141   return std::string(strMsg.c_str());
 142 }
 143
 144 const char *CCECAdapterMessage::ToString(cec_adapter_messagecode msgCode)
 145 {
 146   switch (msgCode)
 147   {
 148   case MSGCODE_NOTHING:
 149     return "NOTHING";
 150   case MSGCODE_PING:
 151     return "PING";
 152   case MSGCODE_TIMEOUT_ERROR:
 153     return "TIMEOUT";
 154   case MSGCODE_HIGH_ERROR:
 155     return "HIGH_ERROR";
 156   case MSGCODE_LOW_ERROR:
 157     return "LOW_ERROR";
 158   case MSGCODE_FRAME_START:
 159     return "FRAME_START";
 160   case MSGCODE_FRAME_DATA:
 161     return "FRAME_DATA";
 162   case MSGCODE_RECEIVE_FAILED:
 163     return "RECEIVE_FAILED";
 164   case MSGCODE_COMMAND_ACCEPTED:
 165     return "COMMAND_ACCEPTED";
 166   case MSGCODE_COMMAND_REJECTED:
 167     return "COMMAND_REJECTED";
 168   case MSGCODE_SET_ACK_MASK:
 169     return "SET_ACK_MASK";
 170   case MSGCODE_TRANSMIT:
 171     return "TRANSMIT";
 172   case MSGCODE_TRANSMIT_EOM:
 173     return "TRANSMIT_EOM";
 174   case MSGCODE_TRANSMIT_IDLETIME:
 175     return "TRANSMIT_IDLETIME";
 176   case MSGCODE_TRANSMIT_ACK_POLARITY:
 177     return "TRANSMIT_ACK_POLARITY";
 178   case MSGCODE_TRANSMIT_LINE_TIMEOUT:
 179     return "TRANSMIT_LINE_TIMEOUT";
 180   case MSGCODE_TRANSMIT_SUCCEEDED:
 181     return "TRANSMIT_SUCCEEDED";
 182   case MSGCODE_TRANSMIT_FAILED_LINE:
 183     return "TRANSMIT_FAILED_LINE";
 184   case MSGCODE_TRANSMIT_FAILED_ACK:
 185     return "TRANSMIT_FAILED_ACK";
 186   case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
 187     return "TRANSMIT_FAILED_TIMEOUT_DATA";
 188   case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
 189     return "TRANSMIT_FAILED_TIMEOUT_LINE";
 190   case MSGCODE_FIRMWARE_VERSION:
 191     return "FIRMWARE_VERSION";
 192   case MSGCODE_START_BOOTLOADER:
 193     return "START_BOOTLOADER";
 194   case MSGCODE_FRAME_EOM:
 195     return "FRAME_EOM";
 196   case MSGCODE_FRAME_ACK:
 197     return "FRAME_ACK";
 198   case MSGCODE_GET_BUILDDATE:
 199     return "GET_BUILDDATE";
 200   case MSGCODE_SET_CONTROLLED:
 201     return "SET_CONTROLLED";
 202   case MSGCODE_GET_AUTO_ENABLED:
 203     return "GET_AUTO_ENABLED";
 204   case MSGCODE_SET_AUTO_ENABLED:
 205     return "SET_AUTO_ENABLED";
 206   case MSGCODE_GET_DEFAULT_LOGICAL_ADDRESS:
 207     return "GET_DEFAULT_LOGICAL_ADDRESS";
 208   case MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS:
 209     return "SET_DEFAULT_LOGICAL_ADDRESS";
 210   case MSGCODE_GET_LOGICAL_ADDRESS_MASK:
 211     return "GET_LOGICAL_ADDRESS_MASK";
 212   case MSGCODE_SET_LOGICAL_ADDRESS_MASK:
 213     return "SET_LOGICAL_ADDRESS_MASK";
 214   case MSGCODE_GET_PHYSICAL_ADDRESS:
 215     return "GET_PHYSICAL_ADDRESS";
 216   case MSGCODE_SET_PHYSICAL_ADDRESS:
 217     return "SET_PHYSICAL_ADDRESS";
 218   case MSGCODE_GET_DEVICE_TYPE:
 219     return "GET_DEVICE_TYPE";
 220   case MSGCODE_SET_DEVICE_TYPE:
 221     return "SET_DEVICE_TYPE";
 222   case MSGCODE_GET_HDMI_VERSION:
 223     return "GET_HDMI_VERSION";
 224   case MSGCODE_SET_HDMI_VERSION:
 225     return "SET_HDMI_VERSION";
 226   case MSGCODE_GET_OSD_NAME:
 227     return "GET_OSD_NAME";
 228   case MSGCODE_SET_OSD_NAME:
 229     return "SET_OSD_NAME";
 230   case MSGCODE_WRITE_EEPROM:
 231     return "WRITE_EEPROM";
 232   default:
 233     break;
 234   }
 235
 236   return "unknown";
 237 }
 238
 239 uint8_t CCECAdapterMessage::operator[](uint8_t pos) const
 240 {
 241   return pos < packet.size ? packet[pos] : 0;
 242 }
 243
 244 uint8_t CCECAdapterMessage::At(uint8_t pos) const
 245 {
 246   return pos < packet.size ? packet[pos] : 0;
 247 }
 248
 249 uint8_t CCECAdapterMessage::Size(void) const
 250 {
 251   return packet.size;
 252 }
 253
 254 bool CCECAdapterMessage::IsEmpty(void) const
 255 {
 256   return packet.IsEmpty();
 257 }
 258
 259 void CCECAdapterMessage::Clear(void)
 260 {
 261   state               = ADAPTER_MESSAGE_STATE_UNKNOWN;
 262   transmit_timeout    = CEC_DEFAULT_TRANSMIT_TIMEOUT;
 263   response.Clear();
 264   packet.Clear();
 265   lineTimeout         = 3;
 266   bNextByteIsEscaped  = false;
 267 }
 268
 269 void CCECAdapterMessage::Shift(uint8_t iShiftBy)
 270 {
 271   packet.Shift(iShiftBy);
 272 }
 273
 274 void CCECAdapterMessage::Append(CCECAdapterMessage &data)
 275 {
 276   Append(data.packet);
 277 }
 278
 279 void CCECAdapterMessage::Append(cec_datapacket &data)
 280 {
 281   for (uint8_t iPtr = 0; iPtr < data.size; iPtr++)
 282     PushBack(data[iPtr]);
 283 }
 284
 285 void CCECAdapterMessage::PushBack(uint8_t byte)
 286 {
 287   packet.PushBack(byte);
 288 }
 289
 290 void CCECAdapterMessage::PushEscaped(uint8_t byte)
 291 {
 292   if (byte >= MSGESC)
 293   {
 294     PushBack(MSGESC);
 295     PushBack(byte - ESCOFFSET);
 296   }
 297   else
 298   {
 299     PushBack(byte);
 300   }
 301 }
 302
 303 bool CCECAdapterMessage::PushReceivedByte(uint8_t byte)
 304 {
 305   if (byte == MSGSTART)
 306   {
 307     if (HasStartMessage())
 308     {
 309       //TODO CLibCEC::AddLog(CEC_LOG_WARNING, "received MSGSTART before MSGEND, removing previous buffer contents");
 310       Clear();
 311     }
 312     PushBack(byte);
 313   }
 314   else
 315   {
 316     if (bNextByteIsEscaped)
 317     {
 318       PushBack(byte + (uint8_t)ESCOFFSET);
 319       bNextByteIsEscaped = false;
 320     }
 321     else if (byte == MSGESC)
 322       bNextByteIsEscaped = true;
 323     else
 324       PushBack(byte);
 325   }
 326
 327   return byte == MSGEND;
 328 }
 329
 330 cec_adapter_messagecode CCECAdapterMessage::Message(void) const
 331 {
 332   return packet.size >= 2 ?
 333       (cec_adapter_messagecode) (packet.At(1) & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK)) :
 334       MSGCODE_NOTHING;
 335 }
 336
 337 cec_adapter_messagecode CCECAdapterMessage::ResponseTo(void) const
 338 {
 339   return packet.size >= 3 ?
 340       (cec_adapter_messagecode) (packet.At(2) & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK)) :
 341       MSGCODE_NOTHING;
 342 }
 343
 344 bool CCECAdapterMessage::IsTranmission(void) const
 345 {
 346   cec_adapter_messagecode msgCode = Message();
 347   return msgCode == MSGCODE_FRAME_ACK ||
 348       msgCode == MSGCODE_FRAME_DATA ||
 349       msgCode == MSGCODE_FRAME_EOM ||
 350       msgCode == MSGCODE_FRAME_START ||
 351       msgCode == MSGCODE_HIGH_ERROR ||
 352       msgCode == MSGCODE_LOW_ERROR ||
 353       msgCode == MSGCODE_RECEIVE_FAILED ||
 354       msgCode == MSGCODE_TRANSMIT_ACK_POLARITY ||
 355       msgCode == MSGCODE_TRANSMIT_EOM ||
 356       msgCode == MSGCODE_TRANSMIT_FAILED_ACK ||
 357       msgCode == MSGCODE_TRANSMIT_FAILED_LINE ||
 358       msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
 359       msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE ||
 360       msgCode == MSGCODE_TRANSMIT_LINE_TIMEOUT ||
 361       msgCode == MSGCODE_TRANSMIT_SUCCEEDED;
 362 }
 363
 364 bool CCECAdapterMessage::IsEOM(void) const
 365 {
 366   return packet.size >= 2 ?
 367       (packet.At(1) & MSGCODE_FRAME_EOM) != 0 :
 368       false;
 369 }
 370
 371 bool CCECAdapterMessage::IsACK(void) const
 372 {
 373   return packet.size >= 2 ?
 374       (packet.At(1) & MSGCODE_FRAME_ACK) != 0 :
 375       false;
 376 }
 377
 378 bool CCECAdapterMessage::IsError(void) const
 379 {
 380   cec_adapter_messagecode code = Message();
 381   return (code == MSGCODE_HIGH_ERROR ||
 382           code == MSGCODE_LOW_ERROR ||
 383           code == MSGCODE_RECEIVE_FAILED ||
 384           code == MSGCODE_COMMAND_REJECTED ||
 385           code == MSGCODE_TRANSMIT_LINE_TIMEOUT ||
 386           code == MSGCODE_TRANSMIT_FAILED_LINE ||
 387           code == MSGCODE_TRANSMIT_FAILED_ACK ||
 388           code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
 389           code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE);
 390 }
 391
 392 bool CCECAdapterMessage::NeedsRetry(void) const
 393 {
 394   return Reply() == MSGCODE_NOTHING ||
 395          Reply() == MSGCODE_RECEIVE_FAILED ||
 396          Reply() == MSGCODE_TIMEOUT_ERROR ||
 397          Reply() == MSGCODE_TRANSMIT_FAILED_LINE ||
 398          Reply() == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
 399          Reply() == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE ||
 400          Reply() == MSGCODE_TRANSMIT_LINE_TIMEOUT;
 401 }
 402
 403 cec_logical_address CCECAdapterMessage::Initiator(void) const
 404 {
 405   return packet.size >= 3 ?
 406       (cec_logical_address) (packet.At(2) >> 4) :
 407       CECDEVICE_UNKNOWN;
 408 }
 409
 410 cec_logical_address CCECAdapterMessage::Destination(void) const
 411 {
 412   return packet.size >= 3 ?
 413       (cec_logical_address) (packet.At(2) & 0xF) :
 414       CECDEVICE_UNKNOWN;
 415 }
 416
 417 bool CCECAdapterMessage::HasStartMessage(void) const
 418 {
 419   return packet.size >= 1 && packet.At(0) == MSGSTART;
 420 }
 421
 422 bool CCECAdapterMessage::PushToCecCommand(cec_command &command) const
 423 {
 424   // empty message
 425   if (IsEmpty())
 426     return false;
 427
 428   cec_adapter_messagecode msgCode = Message();
 429   if (msgCode == MSGCODE_FRAME_START)
 430   {
 431     command.Clear();
 432     if (Size() >= 3)
 433     {
 434       command.initiator   = Initiator();
 435       command.destination = Destination();
 436       command.ack         = IsACK();
 437       command.eom         = IsEOM();
 438     }
 439     return IsEOM() && !IsError();
 440   }
 441   else if (msgCode == MSGCODE_FRAME_DATA)
 442   {
 443     if (Size() >= 3)
 444     {
 445       command.PushBack(At(2));
 446       command.eom = IsEOM();
 447     }
 448     return IsEOM() && !IsError();
 449   }
 450
 451   return false;
 452 }
 453
 454 cec_adapter_messagecode CCECAdapterMessage::Reply(void) const
 455 {
 456   return response.size >= 2 ?
 457       (cec_adapter_messagecode) (response.At(1) & ~(MSGCODE_FRAME_EOM | MSGCODE_FRAME_ACK)) :
 458       MSGCODE_NOTHING;
 459 }