| 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 "../platform/util/StdString.h" |
| 35 | #include "../platform/util/buffer.h" |
| 36 | #include "../platform/threads/mutex.h" |
| 37 | #include "../../../include/cectypes.h" |
| 38 | |
| 39 | namespace CEC |
| 40 | { |
| 41 | typedef enum cec_adapter_message_state |
| 42 | { |
| 43 | ADAPTER_MESSAGE_STATE_UNKNOWN = 0, /**< the initial state */ |
| 44 | ADAPTER_MESSAGE_STATE_WAITING_TO_BE_SENT, /**< waiting in the send queue of the adapter, or timed out */ |
| 45 | ADAPTER_MESSAGE_STATE_SENT, /**< sent and waiting on an ACK */ |
| 46 | ADAPTER_MESSAGE_STATE_SENT_NOT_ACKED, /**< sent, but failed to ACK */ |
| 47 | ADAPTER_MESSAGE_STATE_SENT_ACKED, /**< sent, and ACK received */ |
| 48 | ADAPTER_MESSAGE_STATE_INCOMING, /**< received from another device */ |
| 49 | ADAPTER_MESSAGE_STATE_ERROR /**< an error occured */ |
| 50 | } cec_adapter_message_state; |
| 51 | |
| 52 | class CCECAdapterMessage |
| 53 | { |
| 54 | public: |
| 55 | /*! |
| 56 | * @brief Create an empty message. |
| 57 | */ |
| 58 | CCECAdapterMessage(void); |
| 59 | |
| 60 | /*! |
| 61 | * @brief Create a message with a command that is to be transmitted over the CEC line. |
| 62 | * @param command The command to transmit. |
| 63 | * @param iMaxTries The maximum number of tries. |
| 64 | * @param iLineTimeout The line timeout to use when sending this message the first time. |
| 65 | * @param iRetryLineTimeout The line timeout to use when retrying to send this message. |
| 66 | */ |
| 67 | CCECAdapterMessage(const cec_command &command, uint8_t iMaxTries = 1, uint8_t iLineTimeout = 3, uint8_t iRetryLineTimeout = 3); |
| 68 | |
| 69 | /*! |
| 70 | * @return the message as human readable string. |
| 71 | */ |
| 72 | CStdString ToString(void) const; |
| 73 | |
| 74 | /*! |
| 75 | * @brief Translate the messagecode into a human readable string. |
| 76 | * @param msgCode The messagecode to translate. |
| 77 | * @return The messagecode as string. |
| 78 | */ |
| 79 | static const char *ToString(cec_adapter_messagecode msgCode); |
| 80 | |
| 81 | /*! |
| 82 | * @brief Get the byte at the given position. |
| 83 | * @param pos The position to get. |
| 84 | * @return The requested byte, or 0 when it's out of range. |
| 85 | */ |
| 86 | uint8_t At(uint8_t pos) const; |
| 87 | uint8_t operator[](uint8_t pos) const; |
| 88 | |
| 89 | /*! |
| 90 | * @return The size of the packet in bytes. |
| 91 | */ |
| 92 | uint8_t Size(void) const; |
| 93 | |
| 94 | /*! |
| 95 | * @return True when empty, false otherwise. |
| 96 | */ |
| 97 | bool IsEmpty(void) const; |
| 98 | |
| 99 | /*! |
| 100 | * @brief Clear this message and reset everything to the initial values. |
| 101 | */ |
| 102 | void Clear(void); |
| 103 | |
| 104 | /*! |
| 105 | * @brief Shift the message by the given number of bytes. |
| 106 | * @param iShiftBy The number of bytes to shift. |
| 107 | */ |
| 108 | void Shift(uint8_t iShiftBy); |
| 109 | |
| 110 | /*! |
| 111 | * @brief Append the given message to this message. |
| 112 | * @param data The message to append. |
| 113 | */ |
| 114 | void Append(CCECAdapterMessage &data); |
| 115 | |
| 116 | /*! |
| 117 | * @brief Append the given datapacket to this message. |
| 118 | * @param data The packet to add. |
| 119 | */ |
| 120 | void Append(cec_datapacket &data); |
| 121 | |
| 122 | /*! |
| 123 | * @brief Adds a byte to this message. Does not escape the byte. |
| 124 | * @param byte The byte to add. |
| 125 | */ |
| 126 | void PushBack(uint8_t byte); |
| 127 | |
| 128 | /*! |
| 129 | * @brief Adds a byte to this message and escapes the byte if needed. |
| 130 | * @param byte The byte to add. |
| 131 | */ |
| 132 | void PushEscaped(uint8_t byte); |
| 133 | |
| 134 | /*! |
| 135 | * @brief Adds a byte to this message. |
| 136 | * @param byte The byte to add. |
| 137 | * @return True when a full message was received, false otherwise. |
| 138 | */ |
| 139 | bool PushReceivedByte(uint8_t byte); |
| 140 | |
| 141 | /*! |
| 142 | * @return The messagecode inside this adapter message, or MSGCODE_NOTHING if there is none. |
| 143 | */ |
| 144 | cec_adapter_messagecode Message(void) const; |
| 145 | |
| 146 | /*! |
| 147 | * @return True when this message is a transmission, false otherwise. |
| 148 | */ |
| 149 | bool IsTranmission(void) const; |
| 150 | |
| 151 | /*! |
| 152 | * @return True when the EOM bit is set, false otherwise. |
| 153 | */ |
| 154 | bool IsEOM(void) const; |
| 155 | |
| 156 | /*! |
| 157 | * @return True when the ACK bit is set, false otherwise. |
| 158 | */ |
| 159 | bool IsACK(void) const; |
| 160 | |
| 161 | /*! |
| 162 | * @return True when this message has been replied with an error code, false otherwise. |
| 163 | */ |
| 164 | bool IsError(void) const; |
| 165 | |
| 166 | /*! |
| 167 | * @return True when this message has been replied with an error code and needs to be retried, false otherwise. |
| 168 | */ |
| 169 | bool NeedsRetry(void) const; |
| 170 | |
| 171 | /*! |
| 172 | * @return The logical address of the initiator, or CECDEVICE_UNKNOWN if unknown. |
| 173 | */ |
| 174 | cec_logical_address Initiator(void) const; |
| 175 | |
| 176 | /*! |
| 177 | * @return The logical address of the destination, or CECDEVICE_UNKNOWN if unknown. |
| 178 | */ |
| 179 | cec_logical_address Destination(void) const; |
| 180 | |
| 181 | /*! |
| 182 | * @return True when this message contains a start message, false otherwise. |
| 183 | */ |
| 184 | bool HasStartMessage(void) const; |
| 185 | |
| 186 | /*! |
| 187 | * @brief Push this adapter message to the end of the given cec_command. |
| 188 | * @param command The command to push this message to. |
| 189 | * @return True when a full CEC message was received, false otherwise. |
| 190 | */ |
| 191 | bool PushToCecCommand(cec_command &command) const; |
| 192 | |
| 193 | /*! |
| 194 | * @return The response messagecode. |
| 195 | */ |
| 196 | cec_adapter_messagecode Reply(void) const; |
| 197 | |
| 198 | uint8_t maxTries; /**< the maximum number of times to try to send this message */ |
| 199 | uint8_t tries; /**< the amount of times this message has been sent */ |
| 200 | cec_datapacket response; /**< the response to this message */ |
| 201 | cec_datapacket packet; /**< the actual data */ |
| 202 | cec_adapter_message_state state; /**< the current state of this message */ |
| 203 | int32_t transmit_timeout; /**< the timeout to use when sending this message */ |
| 204 | uint8_t lineTimeout; /**< the default CEC line timeout to use when sending this message */ |
| 205 | uint8_t retryTimeout; /**< the CEC line timeout to use when retrying to send this message */ |
| 206 | |
| 207 | private: |
| 208 | bool bNextByteIsEscaped; /**< true when the next byte that is added will be escaped, false otherwise */ |
| 209 | }; |
| 210 | } |