| 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 "USBCECAdapterMessageQueue.h" |
| 34 | #include "USBCECAdapterCommunication.h" |
| 35 | #include "../platform/sockets/socket.h" |
| 36 | #include "../LibCEC.h" |
| 37 | |
| 38 | using namespace CEC; |
| 39 | using namespace PLATFORM; |
| 40 | using namespace std; |
| 41 | |
| 42 | #define MESSAGE_QUEUE_SIGNAL_WAIT_TIME 1000 |
| 43 | |
| 44 | CCECAdapterMessageQueueEntry::CCECAdapterMessageQueueEntry(CCECAdapterMessageQueue *queue, CCECAdapterMessage *message) : |
| 45 | m_queue(queue), |
| 46 | m_message(message), |
| 47 | m_iPacketsLeft(message->IsTranmission() ? message->Size() / 4 : 1), |
| 48 | m_bSucceeded(false), |
| 49 | m_bWaiting(true) {} |
| 50 | |
| 51 | CCECAdapterMessageQueueEntry::~CCECAdapterMessageQueueEntry(void) { } |
| 52 | |
| 53 | void CCECAdapterMessageQueueEntry::Broadcast(void) |
| 54 | { |
| 55 | CLockObject lock(m_mutex); |
| 56 | m_condition.Broadcast(); |
| 57 | } |
| 58 | |
| 59 | bool CCECAdapterMessageQueueEntry::MessageReceived(const CCECAdapterMessage &message) |
| 60 | { |
| 61 | bool bHandled(false); |
| 62 | |
| 63 | if (IsResponse(message)) |
| 64 | { |
| 65 | switch (message.Message()) |
| 66 | { |
| 67 | case MSGCODE_COMMAND_ACCEPTED: |
| 68 | bHandled = MessageReceivedCommandAccepted(message); |
| 69 | break; |
| 70 | case MSGCODE_TRANSMIT_SUCCEEDED: |
| 71 | bHandled = MessageReceivedTransmitSucceeded(message); |
| 72 | break; |
| 73 | default: |
| 74 | bHandled = MessageReceivedResponse(message); |
| 75 | break; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | return bHandled; |
| 80 | } |
| 81 | |
| 82 | void CCECAdapterMessageQueueEntry::Signal(void) |
| 83 | { |
| 84 | CLockObject lock(m_mutex); |
| 85 | m_bSucceeded = true; |
| 86 | m_condition.Signal(); |
| 87 | } |
| 88 | |
| 89 | bool CCECAdapterMessageQueueEntry::Wait(uint32_t iTimeout) |
| 90 | { |
| 91 | bool bReturn(false); |
| 92 | /* wait until we receive a signal when the tranmission succeeded */ |
| 93 | { |
| 94 | CLockObject lock(m_mutex); |
| 95 | bReturn = m_bSucceeded ? true : m_condition.Wait(m_mutex, m_bSucceeded, iTimeout); |
| 96 | m_bWaiting = false; |
| 97 | } |
| 98 | return bReturn; |
| 99 | } |
| 100 | |
| 101 | bool CCECAdapterMessageQueueEntry::IsWaiting(void) |
| 102 | { |
| 103 | CLockObject lock(m_mutex); |
| 104 | return m_bWaiting; |
| 105 | } |
| 106 | |
| 107 | cec_adapter_messagecode CCECAdapterMessageQueueEntry::MessageCode(void) |
| 108 | { |
| 109 | return m_message->Message(); |
| 110 | } |
| 111 | |
| 112 | bool CCECAdapterMessageQueueEntry::IsResponse(const CCECAdapterMessage &msg) |
| 113 | { |
| 114 | cec_adapter_messagecode msgCode = msg.Message(); |
| 115 | return msgCode == MessageCode() || |
| 116 | msgCode == MSGCODE_TIMEOUT_ERROR || |
| 117 | msgCode == MSGCODE_COMMAND_ACCEPTED || |
| 118 | msgCode == MSGCODE_COMMAND_REJECTED || |
| 119 | (m_message->IsTranmission() && msgCode == MSGCODE_HIGH_ERROR) || |
| 120 | (m_message->IsTranmission() && msgCode == MSGCODE_LOW_ERROR) || |
| 121 | (m_message->IsTranmission() && msgCode == MSGCODE_RECEIVE_FAILED) || |
| 122 | (m_message->IsTranmission() && msgCode == MSGCODE_TRANSMIT_FAILED_LINE) || |
| 123 | (m_message->IsTranmission() && msgCode == MSGCODE_TRANSMIT_FAILED_ACK) || |
| 124 | (m_message->IsTranmission() && msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA) || |
| 125 | (m_message->IsTranmission() && msgCode == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE) || |
| 126 | (m_message->IsTranmission() && msgCode == MSGCODE_TRANSMIT_SUCCEEDED); |
| 127 | } |
| 128 | |
| 129 | const char *CCECAdapterMessageQueueEntry::ToString(void) const |
| 130 | { |
| 131 | /* CEC transmissions got the 'set ack polarity' msgcode, which doesn't look nice */ |
| 132 | if (m_message->IsTranmission()) |
| 133 | return "CEC transmission"; |
| 134 | else |
| 135 | return CCECAdapterMessage::ToString(m_message->Message()); |
| 136 | } |
| 137 | |
| 138 | bool CCECAdapterMessageQueueEntry::MessageReceivedCommandAccepted(const CCECAdapterMessage &message) |
| 139 | { |
| 140 | bool bSendSignal(false); |
| 141 | bool bHandled(false); |
| 142 | { |
| 143 | CLockObject lock(m_mutex); |
| 144 | if (m_iPacketsLeft > 0) |
| 145 | { |
| 146 | /* decrease by 1 */ |
| 147 | m_iPacketsLeft--; |
| 148 | |
| 149 | /* log this message */ |
| 150 | CStdString strLog; |
| 151 | strLog.Format("%s - command accepted", ToString()); |
| 152 | if (m_iPacketsLeft > 0) |
| 153 | strLog.AppendFormat(" - waiting for %d more", m_iPacketsLeft); |
| 154 | m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, strLog); |
| 155 | |
| 156 | /* no more packets left and not a transmission, so we're done */ |
| 157 | if (!m_message->IsTranmission() && m_iPacketsLeft == 0) |
| 158 | { |
| 159 | m_message->state = ADAPTER_MESSAGE_STATE_SENT_ACKED; |
| 160 | m_message->response = message.packet; |
| 161 | bSendSignal = true; |
| 162 | } |
| 163 | bHandled = true; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (bSendSignal) |
| 168 | Signal(); |
| 169 | |
| 170 | return bHandled; |
| 171 | } |
| 172 | |
| 173 | bool CCECAdapterMessageQueueEntry::MessageReceivedTransmitSucceeded(const CCECAdapterMessage &message) |
| 174 | { |
| 175 | { |
| 176 | CLockObject lock(m_mutex); |
| 177 | if (m_iPacketsLeft == 0) |
| 178 | { |
| 179 | /* transmission succeeded, so we're done */ |
| 180 | m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "%s - transmit succeeded", ToString()); |
| 181 | m_message->state = ADAPTER_MESSAGE_STATE_SENT_ACKED; |
| 182 | m_message->response = message.packet; |
| 183 | } |
| 184 | else |
| 185 | { |
| 186 | /* error, we expected more acks |
| 187 | since the messages are processed in order, this should not happen, so this is an error situation */ |
| 188 | m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_WARNING, "%s - received 'transmit succeeded' but not enough 'command accepted' messages (%d left)", ToString(), m_iPacketsLeft); |
| 189 | m_message->state = ADAPTER_MESSAGE_STATE_ERROR; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | Signal(); |
| 194 | |
| 195 | return true; |
| 196 | } |
| 197 | |
| 198 | bool CCECAdapterMessageQueueEntry::MessageReceivedResponse(const CCECAdapterMessage &message) |
| 199 | { |
| 200 | { |
| 201 | CLockObject lock(m_mutex); |
| 202 | m_queue->m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "%s - received response - %s", ToString(), message.ToString().c_str()); |
| 203 | m_message->response = message.packet; |
| 204 | if (m_message->IsTranmission()) |
| 205 | m_message->state = message.Message() == MSGCODE_TRANSMIT_SUCCEEDED ? ADAPTER_MESSAGE_STATE_SENT_ACKED : ADAPTER_MESSAGE_STATE_SENT_NOT_ACKED; |
| 206 | else |
| 207 | m_message->state = ADAPTER_MESSAGE_STATE_SENT_ACKED; |
| 208 | } |
| 209 | |
| 210 | Signal(); |
| 211 | |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | CCECAdapterMessageQueue::~CCECAdapterMessageQueue(void) |
| 217 | { |
| 218 | Clear(); |
| 219 | StopThread(0); |
| 220 | } |
| 221 | |
| 222 | void CCECAdapterMessageQueue::Clear(void) |
| 223 | { |
| 224 | StopThread(5); |
| 225 | CLockObject lock(m_mutex); |
| 226 | m_writeQueue.Clear(); |
| 227 | m_messages.clear(); |
| 228 | } |
| 229 | |
| 230 | void *CCECAdapterMessageQueue::Process(void) |
| 231 | { |
| 232 | CCECAdapterMessageQueueEntry *message(NULL); |
| 233 | while (!IsStopped()) |
| 234 | { |
| 235 | /* wait for a new message */ |
| 236 | if (m_writeQueue.Pop(message, MESSAGE_QUEUE_SIGNAL_WAIT_TIME) && message) |
| 237 | { |
| 238 | /* write this message */ |
| 239 | { |
| 240 | CLockObject lock(m_mutex); |
| 241 | m_com->WriteToDevice(message->m_message); |
| 242 | } |
| 243 | if (message->m_message->state == ADAPTER_MESSAGE_STATE_ERROR || |
| 244 | message->m_message->Message() == MSGCODE_START_BOOTLOADER) |
| 245 | { |
| 246 | message->Signal(); |
| 247 | Clear(); |
| 248 | break; |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | return NULL; |
| 253 | } |
| 254 | |
| 255 | void CCECAdapterMessageQueue::MessageReceived(const CCECAdapterMessage &msg) |
| 256 | { |
| 257 | bool bHandled(false); |
| 258 | CLockObject lock(m_mutex); |
| 259 | /* send the received message to each entry in the queue until it is handled */ |
| 260 | for (map<uint64_t, CCECAdapterMessageQueueEntry *>::iterator it = m_messages.begin(); !bHandled && it != m_messages.end(); it++) |
| 261 | bHandled = it->second->MessageReceived(msg); |
| 262 | |
| 263 | if (!bHandled) |
| 264 | { |
| 265 | /* the message wasn't handled */ |
| 266 | bool bIsError(m_com->HandlePoll(msg)); |
| 267 | m_com->m_callback->GetLib()->AddLog(bIsError ? CEC_LOG_WARNING : CEC_LOG_DEBUG, msg.ToString()); |
| 268 | |
| 269 | /* push this message to the current frame */ |
| 270 | if (!bIsError && msg.PushToCecCommand(m_currentCECFrame)) |
| 271 | { |
| 272 | /* and push the current frame back over the callback method when a full command was received */ |
| 273 | if (m_com->IsInitialised()) |
| 274 | m_com->m_callback->OnCommandReceived(m_currentCECFrame); |
| 275 | |
| 276 | /* clear the current frame */ |
| 277 | m_currentCECFrame.Clear(); |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | void CCECAdapterMessageQueue::AddData(uint8_t *data, size_t iLen) |
| 283 | { |
| 284 | for (size_t iPtr = 0; iPtr < iLen; iPtr++) |
| 285 | { |
| 286 | bool bFullMessage(false); |
| 287 | { |
| 288 | CLockObject lock(m_mutex); |
| 289 | bFullMessage = m_incomingAdapterMessage.PushReceivedByte(data[iPtr]); |
| 290 | } |
| 291 | |
| 292 | if (bFullMessage) |
| 293 | { |
| 294 | /* a full message was received */ |
| 295 | CCECAdapterMessage newMessage; |
| 296 | newMessage.packet = m_incomingAdapterMessage.packet; |
| 297 | MessageReceived(newMessage); |
| 298 | |
| 299 | /* clear the current message */ |
| 300 | CLockObject lock(m_mutex); |
| 301 | m_incomingAdapterMessage.Clear(); |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | bool CCECAdapterMessageQueue::Write(CCECAdapterMessage *msg) |
| 307 | { |
| 308 | msg->state = ADAPTER_MESSAGE_STATE_WAITING_TO_BE_SENT; |
| 309 | |
| 310 | /* set the correct line timeout */ |
| 311 | if (msg->IsTranmission()) |
| 312 | { |
| 313 | m_com->SetLineTimeout(msg->lineTimeout); |
| 314 | } |
| 315 | |
| 316 | CCECAdapterMessageQueueEntry *entry = new CCECAdapterMessageQueueEntry(this, msg); |
| 317 | uint64_t iEntryId(0); |
| 318 | /* add to the wait for ack queue */ |
| 319 | if (msg->Message() != MSGCODE_START_BOOTLOADER) |
| 320 | { |
| 321 | CLockObject lock(m_mutex); |
| 322 | iEntryId = m_iNextMessage++; |
| 323 | m_messages.insert(make_pair(iEntryId, entry)); |
| 324 | } |
| 325 | |
| 326 | /* add the message to the write queue */ |
| 327 | m_writeQueue.Push(entry); |
| 328 | |
| 329 | bool bReturn(true); |
| 330 | if (entry) |
| 331 | { |
| 332 | if (!entry->Wait(msg->transmit_timeout <= 5 ? CEC_DEFAULT_TRANSMIT_WAIT : msg->transmit_timeout)) |
| 333 | { |
| 334 | m_com->m_callback->GetLib()->AddLog(CEC_LOG_DEBUG, "command '%s' was not acked by the controller", CCECAdapterMessage::ToString(msg->Message())); |
| 335 | msg->state = ADAPTER_MESSAGE_STATE_SENT_NOT_ACKED; |
| 336 | bReturn = false; |
| 337 | } |
| 338 | |
| 339 | if (msg->Message() != MSGCODE_START_BOOTLOADER) |
| 340 | { |
| 341 | CLockObject lock(m_mutex); |
| 342 | m_messages.erase(iEntryId); |
| 343 | } |
| 344 | delete entry; |
| 345 | } |
| 346 | |
| 347 | return bReturn; |
| 348 | } |