1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * avrcp.h 40 * 41 * Audio/Video Remote Control Profile 42 * 43 */ 44 45 #ifndef __AVRCP_H 46 #define __AVRCP_H 47 48 #include <stdint.h> 49 #include "btstack_run_loop.h" 50 #include "btstack_linked_list.h" 51 52 #if defined __cplusplus 53 extern "C" { 54 #endif 55 56 #define BT_SIG_COMPANY_ID 0x001958 57 #define AVRCP_MEDIA_ATTR_COUNT 7 58 #define AVRCP_MAX_ATTRIBUTTE_SIZE 100 59 #define AVRCP_ATTRIBUTE_HEADER_LEN 8 60 61 typedef enum { 62 AVRCP_STATUS_INVALID_COMMAND = 0, // sent if TG received a PDU that it did not understand. 63 AVRCP_STATUS_INVALID_PARAMETER, // Sent if the TG received a PDU with a parameter ID that it did not understand, or, if there is only one parameter ID in the PDU. 64 AVRCP_STATUS_SPECIFIED_PARAMETER_NOT_FOUND, // sent if the parameter ID is understood, but content is wrong or corrupted. 65 AVRCP_STATUS_INTERNAL_ERROR, // sent if there are error conditions not covered by a more specific error code. 66 AVRCP_STATUS_SUCCESS, // sent if the operation was successful. 67 AVRCP_STATUS_UID_CHANGED, // sent if the UIDs on the device have changed. 68 AVRCP_STATUS_RESERVED_6, 69 AVRCP_STATUS_INVALID_DIRECTION, // The Direction parameter is invalid. Valid for command: Change Path 70 AVRCP_STATUS_NOT_A_DIRECTORY, // The UID provided does not refer to a folder item. Valid for command: Change Path 71 AVRCP_STATUS_DOES_NOT_EXIST, // The UID provided does not refer to any currently valid. Valid for command: Change Path, PlayItem, AddToNowPlaying, GetItemAttributes 72 AVRCP_STATUS_INVALID_SCOPE, // The scope parameter is invalid. Valid for command: GetFolderItems, PlayItem, AddToNowPlayer, GetItemAttributes, 73 AVRCP_STATUS_RANGE_OUT_OF_BOUNDS, // The start of range provided is not valid. Valid for command: GetFolderItems 74 AVRCP_STATUS_UID_IS_A_DIRECTORY, // The UID provided refers to a directory, which cannot be handled by this media player. Valid for command: PlayItem, AddToNowPlaying 75 AVRCP_STATUS_MEDIA_IN_USE, // The media is not able to be used for this operation at this time. Valid for command: PlayItem, AddToNowPlaying 76 AVRCP_STATUS_NOW_PLAYING_LIST_FULL, // No more items can be added to the Now Playing List. Valid for command: AddToNowPlaying 77 AVRCP_STATUS_SEARCH_NOT_SUPPORTED, // The Browsed Media Player does not support search. Valid for command: Search 78 AVRCP_STATUS_SEARCH_IN_PROGRESS, // A search operation is already in progress. Valid for command: Search 79 AVRCP_STATUS_INVALID_PLAYER_ID, // The specified Player Id does not refer to a valid player. Valid for command: SetAddressedPlayer, SetBrowsedPlayer 80 AVRCP_STATUS_PLAYER_NOT_BROWSABLE, // The Player Id supplied refers to a Media Player which does not support browsing. Valid for command: SetBrowsedPlayer 81 AVRCP_STATUS_PLAYER_NOT_ADDRESSED, // The Player Id supplied refers to a player which is not currently addressed, and the command is not able to be performed if the player is not set as addressed. Valid for command: Search SetBrowsedPlayer 82 AVRCP_STATUS_NO_VALID_SEARCH_RESULTS, // The Search result list does not contain valid entries, e.g. after being invalidated due to change of browsed player. Valid for command: GetFolderItems 83 AVRCP_STATUS_NO_AVAILABLE_PLAYERS, 84 AVRCP_STATUS_ADDRESSED_PLAYER_CHANGED, // Valid for command: Register Notification 85 AVRCP_STATUS_RESERVED // 0x17 - 0xFF 86 } avrcp_status_code_t; 87 88 typedef enum { 89 AVRCP_SINGLE_PACKET= 0, 90 AVRCP_START_PACKET , 91 AVRCP_CONTINUE_PACKET , 92 AVRCP_END_PACKET 93 } avrcp_packet_type_t; 94 95 typedef enum { 96 AVRCP_COMMAND_FRAME = 0, 97 AVRCP_RESPONSE_FRAME 98 } avrcp_frame_type_t; 99 100 101 typedef enum { 102 AVRCP_CAPABILITY_ID_COMPANY = 0x02, 103 AVRCP_CAPABILITY_ID_EVENT = 0x03 104 } avrcp_capability_id_t; 105 106 typedef enum { 107 AVRCP_MEDIA_ATTR_ALL = 0, 108 AVRCP_MEDIA_ATTR_TITLE, 109 AVRCP_MEDIA_ATTR_ARTIST, 110 AVRCP_MEDIA_ATTR_ALBUM, 111 AVRCP_MEDIA_ATTR_TRACK, 112 AVRCP_MEDIA_ATTR_TOTAL_TRACKS, 113 AVRCP_MEDIA_ATTR_GENRE, 114 AVRCP_MEDIA_ATTR_SONG_LENGTH_MS, 115 AVRCP_MEDIA_ATTR_NONE = 0xFFFFFFFF 116 } avrcp_media_attribute_id_t; 117 118 typedef enum { 119 AVRCP_PDU_ID_GET_CAPABILITIES = 0x10, 120 AVRCP_PDU_ID_GetCurrentPlayerApplicationSettingValue = 0x13, 121 AVRCP_PDU_ID_SetPlayerApplicationSettingValue = 0x14, 122 AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES = 0x20, 123 AVRCP_PDU_ID_GET_PLAY_STATUS = 0x30, 124 AVRCP_PDU_ID_REGISTER_NOTIFICATION = 0x31, 125 AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE = 0x40, 126 AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE = 0x41, 127 AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME = 0x50, 128 AVRCP_PDU_ID_SET_ADDRESSED_PLAYER = 0x60, 129 AVRCP_PDU_ID_SET_BROWSED_PLAYER = 0x70, 130 AVRCP_PDU_ID_GET_FOLDER_ITEMS = 0x71, 131 AVRCP_PDU_ID_CHANGE_PATH = 0x72, 132 AVRCP_PDU_ID_UNDEFINED = 0xFF 133 } avrcp_pdu_id_t; 134 135 typedef enum { 136 AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED = 0x01, // Change in playback status of the current track. 137 AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED = 0x02, // Change of current track 138 AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_END = 0x03, // Reached end of a track 139 AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_START = 0x04, // Reached start of a track 140 AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED = 0x05, // Change in playback position. Returned after the specified playback notification change notification interval 141 AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED = 0x06, // Change in battery status 142 AVRCP_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED = 0x07, // Change in system status 143 AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED = 0x08, // Change in player application setting 144 AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED = 0x09, // The content of the Now Playing list has changed, see 6.9.5. 145 AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED = 0x0a, // The available players have changed, see 6.9.4. 146 AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED = 0x0b, // The Addressed Player has been changed, see 6.9.2. 147 AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED = 0x0c, // The UIDs have changed, see 6.10.3.3. 148 AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED = 0x0d // The volume has been changed locally on the TG, see 6.13.3. 149 } avrcp_notification_event_id_t; 150 151 // control command response: accepted, rejected, interim 152 // status command response: not implemented, rejected, in transition, stable 153 // notify command response: not implemented, rejected, changed 154 155 typedef enum { 156 AVRCP_CTYPE_CONTROL = 0, 157 AVRCP_CTYPE_STATUS, 158 AVRCP_CTYPE_SPECIFIC_INQUIRY, 159 AVRCP_CTYPE_NOTIFY, 160 AVRCP_CTYPE_GENERAL_INQUIRY, 161 AVRCP_CTYPE_RESERVED5, 162 AVRCP_CTYPE_RESERVED6, 163 AVRCP_CTYPE_RESERVED7, 164 AVRCP_CTYPE_RESPONSE_NOT_IMPLEMENTED = 8, 165 AVRCP_CTYPE_RESPONSE_ACCEPTED, 166 AVRCP_CTYPE_RESPONSE_REJECTED, 167 AVRCP_CTYPE_RESPONSE_IN_TRANSITION, // target state is in transition. A subsequent STATUS command, may result in the return of a STABLE status 168 AVRCP_CTYPE_RESPONSE_IMPLEMENTED_STABLE, 169 AVRCP_CTYPE_RESPONSE_CHANGED_STABLE, 170 AVRCP_CTYPE_RESPONSE_RESERVED, 171 AVRCP_CTYPE_RESPONSE_INTERIM // target is unable to respond with either ACCEPTED or REJECTED within 100 millisecond 172 } avrcp_command_type_t; 173 174 typedef enum { 175 AVRCP_SUBUNIT_TYPE_MONITOR = 0, 176 AVRCP_SUBUNIT_TYPE_AUDIO = 1, 177 AVRCP_SUBUNIT_TYPE_PRINTER, 178 AVRCP_SUBUNIT_TYPE_DISC, 179 AVRCP_SUBUNIT_TYPE_TAPE_RECORDER_PLAYER, 180 AVRCP_SUBUNIT_TYPE_TUNER, 181 AVRCP_SUBUNIT_TYPE_CA, 182 AVRCP_SUBUNIT_TYPE_CAMERA, 183 AVRCP_SUBUNIT_TYPE_RESERVED, 184 AVRCP_SUBUNIT_TYPE_PANEL = 9, 185 AVRCP_SUBUNIT_TYPE_BULLETIN_BOARD, 186 AVRCP_SUBUNIT_TYPE_CAMERA_STORAGE, 187 AVRCP_SUBUNIT_TYPE_VENDOR_UNIQUE = 0x1C, 188 AVRCP_SUBUNIT_TYPE_RESERVED_FOR_ALL_SUBUNIT_TYPES, 189 AVRCP_SUBUNIT_TYPE_EXTENDED_TO_NEXT_BYTE, // The unit_type field may take value 1E16, which means that the field is extended to the following byte. In that case, an additional byte for extended_unit_type will be added immediately following operand[1]. 190 // Further extension is possible when the value of extended_unit_type is FF16, in which case another byte will be added. 191 AVRCP_SUBUNIT_TYPE_UNIT = 0x1F 192 } avrcp_subunit_type_t; 193 194 typedef enum { 195 AVRCP_SUBUNIT_ID = 0, 196 AVRCP_SUBUNIT_ID_IGNORE = 7 197 } avrcp_subunit_id_t; 198 199 typedef enum { 200 AVRCP_CMD_OPCODE_VENDOR_DEPENDENT = 0x00, 201 // AVRCP_CMD_OPCODE_RESERVE = 0x01, 202 AVRCP_CMD_OPCODE_UNIT_INFO = 0x30, 203 AVRCP_CMD_OPCODE_SUBUNIT_INFO = 0x31, 204 AVRCP_CMD_OPCODE_PASS_THROUGH = 0x7C, 205 // AVRCP_CMD_OPCODE_VERSION = 0xB0, 206 // AVRCP_CMD_OPCODE_POWER = 0xB2, 207 AVRCP_CMD_OPCODE_UNDEFINED = 0xFF 208 } avrcp_command_opcode_t; 209 210 typedef enum { 211 AVRCP_OPERATION_ID_SKIP = 0x3C, 212 AVRCP_OPERATION_ID_VOLUME_UP = 0x41, 213 AVRCP_OPERATION_ID_VOLUME_DOWN = 0x42, 214 AVRCP_OPERATION_ID_MUTE = 0x43, 215 216 AVRCP_OPERATION_ID_PLAY = 0x44, 217 AVRCP_OPERATION_ID_STOP = 0x45, 218 AVRCP_OPERATION_ID_PAUSE = 0x46, 219 AVRCP_OPERATION_ID_REWIND = 0x48, 220 AVRCP_OPERATION_ID_FAST_FORWARD = 0x49, 221 AVRCP_OPERATION_ID_FORWARD = 0x4B, 222 AVRCP_OPERATION_ID_BACKWARD = 0x4C, 223 AVRCP_OPERATION_ID_UNDEFINED = 0xFF 224 } avrcp_operation_id_t; 225 226 typedef enum{ 227 AVRCP_PLAYBACK_STATUS_STOPPED = 0x00, 228 AVRCP_PLAYBACK_STATUS_PLAYING, 229 AVRCP_PLAYBACK_STATUS_PAUSED, 230 AVRCP_PLAYBACK_STATUS_FWD_SEEK, 231 AVRCP_PLAYBACK_STATUS_REV_SEEK, 232 AVRCP_PLAYBACK_STATUS_ERROR = 0xFF 233 } avrcp_playback_status_t; 234 235 typedef enum{ 236 AVRCP_BATTERY_STATUS_NORMAL = 0x00, // Battery operation is in normal state 237 AVRCP_BATTERY_STATUS_WARNING, // unable to operate soon. Is provided when the battery level is going down. 238 AVRCP_BATTERY_STATUS_CRITICAL, // can not operate any more. Is provided when the battery level is going down. 239 AVRCP_BATTERY_STATUS_EXTERNAL, // Plugged to external power supply 240 AVRCP_BATTERY_STATUS_FULL_CHARGE // when the device is completely charged from the external power supply 241 } avrcp_battery_status_t; 242 243 244 typedef enum { 245 AVCTP_CONNECTION_IDLE, 246 AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE, 247 AVCTP_CONNECTION_W4_ERTM_CONFIGURATION, 248 AVCTP_CONNECTION_W4_L2CAP_CONNECTED, 249 AVCTP_CONNECTION_OPENED, 250 AVCTP_W2_SEND_PRESS_COMMAND, 251 AVCTP_W2_SEND_RELEASE_COMMAND, 252 AVCTP_W4_STOP, 253 AVCTP_W2_SEND_COMMAND, 254 AVCTP_W2_SEND_RESPONSE, 255 AVCTP_W2_RECEIVE_PRESS_RESPONSE, 256 AVCTP_W2_RECEIVE_RESPONSE 257 } avctp_connection_state_t; 258 259 typedef struct { 260 uint16_t len; 261 uint8_t * value; 262 } avrcp_now_playing_info_item_t; 263 264 typedef struct { 265 uint8_t track_id[8]; 266 uint16_t track_nr; 267 char * title; 268 char * artist; 269 char * album; 270 char * genre; 271 uint32_t song_length_ms; 272 uint32_t song_position_ms; 273 } avrcp_track_t; 274 275 typedef enum { 276 AVRCP_PARSER_IDLE = 0, 277 AVRCP_PARSER_GET_ATTRIBUTE_HEADER, // 8 bytes 278 AVRCP_PARSER_GET_ATTRIBUTE_VALUE, 279 AVRCP_PARSER_IGNORE_ATTRIBUTE_VALUE 280 } avrcp_parser_state_t; 281 282 // BROWSING 283 typedef struct { 284 uint16_t l2cap_browsing_cid; 285 286 avctp_connection_state_t state; 287 uint8_t wait_to_send; 288 uint8_t transaction_label; 289 290 uint8_t *ertm_buffer; 291 uint32_t ertm_buffer_size; 292 l2cap_ertm_config_t ertm_config; 293 294 // players 295 uint8_t set_addressed_player_id; 296 uint8_t set_browsed_player_id; 297 298 uint16_t addressed_player_id; 299 uint16_t browsed_player_id; 300 uint16_t browsed_player_uid_counter; 301 302 // get folder item 303 uint8_t get_folder_item; 304 uint8_t scope; 305 uint32_t start_item; 306 uint32_t end_item; 307 uint32_t attr_bitmap; 308 309 // change_path 310 uint8_t change_path; 311 uint8_t direction; 312 uint16_t uid_counter; 313 uint8_t folder_uid[8]; 314 } avrcp_browsing_connection_t; 315 // BROWSING END 316 317 typedef struct { 318 btstack_linked_item_t item; 319 bd_addr_t remote_addr; 320 uint16_t l2cap_signaling_cid; 321 uint16_t avrcp_cid; 322 323 uint16_t avrcp_browsing_cid; 324 uint16_t browsing_l2cap_psm; 325 uint16_t browsing_version; 326 327 avrcp_browsing_connection_t * browsing_connection; 328 329 avctp_connection_state_t state; 330 uint8_t wait_to_send; 331 332 // command 333 uint8_t transaction_label; 334 avrcp_command_opcode_t command_opcode; 335 avrcp_command_type_t command_type; 336 avrcp_subunit_type_t subunit_type; 337 avrcp_subunit_id_t subunit_id; 338 avrcp_packet_type_t packet_type; 339 340 uint8_t cmd_operands[20]; 341 uint8_t cmd_operands_length; 342 btstack_timer_source_t press_and_hold_cmd_timer; 343 uint8_t continuous_fast_forward_cmd; 344 uint16_t notifications_enabled; 345 uint16_t notifications_to_register; 346 uint16_t notifications_to_deregister; 347 348 avrcp_subunit_type_t unit_type; 349 uint32_t company_id; 350 avrcp_subunit_type_t subunit_info_type; 351 const uint8_t * subunit_info_data; 352 uint16_t subunit_info_data_size; 353 354 avrcp_now_playing_info_item_t now_playing_info[AVRCP_MEDIA_ATTR_COUNT]; 355 uint8_t track_id[8]; 356 uint32_t song_length_ms; 357 uint32_t song_position_ms; 358 int total_tracks; 359 int track_nr; 360 uint8_t track_selected; 361 uint8_t track_changed; 362 363 avrcp_playback_status_t playback_status; 364 uint8_t playback_status_changed; 365 366 uint8_t playing_content_changed; 367 368 avrcp_battery_status_t battery_status; 369 uint8_t battery_status_changed; 370 uint8_t volume_percentage; 371 uint8_t volume_percentage_changed; 372 uint8_t now_playing_info_response; 373 uint8_t now_playing_info_attr_bitmap; 374 uint8_t abort_continue_response; 375 376 // used for fragmentation 377 avrcp_media_attribute_id_t next_attr_id; 378 379 avrcp_parser_state_t parser_state; 380 uint8_t parser_attribute_header[AVRCP_ATTRIBUTE_HEADER_LEN]; 381 uint8_t parser_attribute_header_pos; 382 383 uint16_t list_size; 384 uint16_t list_offset; 385 uint8_t attribute_value[AVRCP_MAX_ATTRIBUTTE_SIZE]; 386 uint16_t attribute_value_len; 387 uint16_t attribute_value_offset; 388 389 uint32_t attribute_id; 390 391 uint8_t num_attributes; 392 uint8_t num_parsed_attributes; 393 } avrcp_connection_t; 394 395 typedef enum { 396 AVRCP_SHUFFLE_MODE_INVALID, 397 AVRCP_SHUFFLE_MODE_OFF, 398 AVRCP_SHUFFLE_MODE_ALL_TRACKS, 399 AVRCP_SHUFFLE_MODE_GROUP 400 } avrcp_shuffle_mode_t; 401 402 typedef enum { 403 AVRCP_REPEAT_MODE_INVALID, 404 AVRCP_REPEAT_MODE_OFF, 405 AVRCP_REPEAT_MODE_SINGLE_TRACK, 406 AVRCP_REPEAT_MODE_ALL_TRACKS, 407 AVRCP_REPEAT_MODE_GROUP 408 } avrcp_repeat_mode_t; 409 410 typedef enum{ 411 AVRCP_CONTROLLER = 0, 412 AVRCP_TARGET 413 } avrcp_role_t; 414 415 typedef enum { 416 RFC2978_CHARSET_MIB_UTF8 = 106 417 } rfc2978_charset_mib_enumid_t; 418 419 typedef struct { 420 avrcp_role_t role; 421 btstack_linked_list_t connections; 422 btstack_packet_handler_t avrcp_callback; 423 btstack_packet_handler_t packet_handler; 424 425 btstack_packet_handler_t browsing_avrcp_callback; 426 btstack_packet_handler_t browsing_packet_handler; 427 428 // SDP query 429 uint8_t parse_sdp_record; 430 uint32_t record_id; 431 uint16_t avrcp_cid; 432 uint16_t avrcp_l2cap_psm; 433 uint16_t avrcp_version; 434 } avrcp_context_t; 435 436 437 const char * avrcp_subunit2str(uint16_t index); 438 const char * avrcp_event2str(uint16_t index); 439 const char * avrcp_operation2str(uint8_t index); 440 const char * avrcp_attribute2str(uint8_t index); 441 const char * avrcp_play_status2str(uint8_t index); 442 const char * avrcp_ctype2str(uint8_t index); 443 const char * avrcp_repeat2str(uint8_t index); 444 const char * avrcp_shuffle2str(uint8_t index); 445 446 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context); 447 448 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, const char * service_name, const char * service_provider_name); 449 uint8_t avrcp_connect(bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid); 450 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status); 451 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid); 452 453 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size); 454 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avrcp_context_t * context); 455 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(uint16_t avrcp_cid, avrcp_context_t * context); 456 avrcp_connection_t * get_avrcp_connection_for_bd_addr(bd_addr_t addr, avrcp_context_t * context); 457 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid); 458 uint16_t avrcp_get_next_cid(void); 459 460 // SDP query 461 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 462 463 #if defined __cplusplus 464 } 465 #endif 466 467 #endif // __AVRCP_H