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 #define BTSTACK_FILE__ "avrcp_controller.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 46 #include "btstack.h" 47 #include "classic/avrcp.h" 48 #include "classic/avrcp_controller.h" 49 50 // made public in avrcp_controller.h 51 52 static int avrcp_controller_supports_browsing(uint16_t controller_supported_features){ 53 return controller_supported_features & (1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING); 54 } 55 56 void avrcp_controller_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 57 avrcp_create_sdp_record(1, service, service_record_handle, avrcp_controller_supports_browsing(supported_features), supported_features, service_name, service_provider_name); 58 } 59 60 static void avrcp_emit_repeat_and_shuffle_mode(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_repeat_mode_t repeat_mode, avrcp_shuffle_mode_t shuffle_mode){ 61 btstack_assert(callback != NULL); 62 63 uint8_t event[8]; 64 int pos = 0; 65 event[pos++] = HCI_EVENT_AVRCP_META; 66 event[pos++] = sizeof(event) - 2; 67 event[pos++] = AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE; 68 little_endian_store_16(event, pos, avrcp_cid); 69 pos += 2; 70 event[pos++] = ctype; 71 event[pos++] = repeat_mode; 72 event[pos++] = shuffle_mode; 73 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 74 } 75 76 static void avrcp_emit_operation_status(btstack_packet_handler_t callback, uint8_t subevent, uint16_t avrcp_cid, uint8_t ctype, uint8_t operation_id){ 77 btstack_assert(callback != NULL); 78 79 uint8_t event[7]; 80 int pos = 0; 81 event[pos++] = HCI_EVENT_AVRCP_META; 82 event[pos++] = sizeof(event) - 2; 83 event[pos++] = subevent; 84 little_endian_store_16(event, pos, avrcp_cid); 85 pos += 2; 86 event[pos++] = ctype; 87 event[pos++] = operation_id; 88 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 89 } 90 91 static void avrcp_press_and_hold_timeout_handler(btstack_timer_source_t * timer){ 92 UNUSED(timer); 93 avrcp_connection_t * connection = (avrcp_connection_t*) btstack_run_loop_get_timer_context(timer); 94 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 95 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 96 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 97 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 98 } 99 100 static void avrcp_press_and_hold_timer_start(avrcp_connection_t * connection){ 101 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 102 btstack_run_loop_set_timer_handler(&connection->press_and_hold_cmd_timer, avrcp_press_and_hold_timeout_handler); 103 btstack_run_loop_set_timer_context(&connection->press_and_hold_cmd_timer, connection); 104 btstack_run_loop_set_timer(&connection->press_and_hold_cmd_timer, 2000); // 2 seconds timeout 105 btstack_run_loop_add_timer(&connection->press_and_hold_cmd_timer); 106 } 107 108 static void avrcp_press_and_hold_timer_stop(avrcp_connection_t * connection){ 109 connection->continuous_fast_forward_cmd = 0; 110 btstack_run_loop_remove_timer(&connection->press_and_hold_cmd_timer); 111 } 112 113 static uint8_t request_pass_through_release_control_cmd(avrcp_connection_t * connection){ 114 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 115 if (connection->continuous_fast_forward_cmd){ 116 avrcp_press_and_hold_timer_stop(connection); 117 } 118 connection->cmd_operands[0] = 0x80 | connection->cmd_operands[0]; 119 connection->transaction_label++; 120 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 121 return ERROR_CODE_SUCCESS; 122 } 123 124 static inline uint8_t request_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed, uint8_t continuous_fast_forward_cmd){ 125 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 126 if (!connection){ 127 log_error("avrcp: could not find a connection. avrcp cid 0x%02x", avrcp_cid); 128 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 129 } 130 131 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 132 connection->state = AVCTP_W2_SEND_PRESS_COMMAND; 133 connection->command_opcode = AVRCP_CMD_OPCODE_PASS_THROUGH; 134 connection->command_type = AVRCP_CTYPE_CONTROL; 135 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 136 connection->subunit_id = AVRCP_SUBUNIT_ID; 137 connection->cmd_operands_length = 0; 138 139 connection->continuous_fast_forward_cmd = continuous_fast_forward_cmd; 140 connection->cmd_operands_length = 2; 141 connection->cmd_operands[0] = opid; 142 if (playback_speed > 0){ 143 connection->cmd_operands[2] = playback_speed; 144 connection->cmd_operands_length++; 145 } 146 connection->cmd_operands[1] = connection->cmd_operands_length - 2; 147 148 if (connection->continuous_fast_forward_cmd){ 149 avrcp_press_and_hold_timer_start(connection); 150 } 151 152 connection->transaction_label++; 153 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 154 return ERROR_CODE_SUCCESS; 155 } 156 157 static uint8_t request_single_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 158 return request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, 0); 159 } 160 161 static uint8_t request_continuous_pass_through_press_control_cmd(uint16_t avrcp_cid, avrcp_operation_id_t opid, uint16_t playback_speed){ 162 return request_pass_through_press_control_cmd(avrcp_cid, opid, playback_speed, 1); 163 } 164 165 #define AVRCP_CMD_BUFFER_SIZE 30 166 static uint16_t avrcp_get_max_payload_size_for_packet_type(avrcp_packet_type_t packet_type){ 167 switch (packet_type){ 168 case AVRCP_SINGLE_PACKET: 169 return AVRCP_CMD_BUFFER_SIZE - 3; 170 case AVRCP_START_PACKET: 171 return AVRCP_CMD_BUFFER_SIZE - 4; 172 case AVRCP_CONTINUE_PACKET: 173 case AVRCP_END_PACKET: 174 return AVRCP_CMD_BUFFER_SIZE - 1; 175 } 176 return 0; 177 } 178 179 static int avrcp_send_cmd(avrcp_connection_t * connection, avrcp_packet_type_t packet_type){ 180 uint8_t command[AVRCP_CMD_BUFFER_SIZE]; 181 int pos = 0; 182 uint16_t max_bytes = sizeof(command) - 1; 183 184 // transport header 185 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 186 command[pos++] = (connection->transaction_label << 4) | (packet_type << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 187 188 if (packet_type == AVRCP_START_PACKET){ 189 // num packets: (3 bytes overhead (PID, num packets) + command) / (MTU - transport header) 190 command[pos++] = ((connection->cmd_operands_fragmented_len + 3 - 1) / (AVRCP_CMD_BUFFER_SIZE - 1)) + 1; 191 max_bytes -= 3; 192 } 193 194 if ((packet_type == AVRCP_SINGLE_PACKET) || (packet_type == AVRCP_START_PACKET)){ 195 // Profile IDentifier (PID) 196 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 197 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 198 199 // command_type 200 command[pos++] = connection->command_type; 201 // subunit_type | subunit ID 202 command[pos++] = (connection->subunit_type << 3) | connection->subunit_id; 203 // opcode 204 command[pos++] = (uint8_t)connection->command_opcode; 205 } 206 207 if (packet_type == AVRCP_SINGLE_PACKET){ 208 // operands 209 (void)memcpy(command + pos, connection->cmd_operands, 210 connection->cmd_operands_length); 211 pos += connection->cmd_operands_length; 212 } else { 213 uint16_t bytes_to_copy = btstack_min(connection->cmd_operands_fragmented_len-connection->cmd_operands_fragmented_pos, max_bytes); 214 (void)memcpy(command + pos, 215 &connection->cmd_operands_fragmented_buffer[connection->cmd_operands_fragmented_pos], 216 bytes_to_copy); 217 pos += bytes_to_copy; 218 connection->cmd_operands_fragmented_pos += bytes_to_copy; 219 } 220 221 return l2cap_send(connection->l2cap_signaling_cid, command, pos); 222 } 223 224 static int avrcp_register_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 225 if (connection->notifications_to_deregister & (1 << event_id)) return 0; 226 if (connection->notifications_enabled & (1 << event_id)) return 0; 227 if (connection->notifications_to_register & (1 << event_id)) return 0; 228 connection->notifications_to_register |= (1 << event_id); 229 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 230 return 1; 231 } 232 233 static void avrcp_prepare_notification(avrcp_connection_t * connection, avrcp_notification_event_id_t event_id){ 234 connection->transaction_label++; 235 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 236 connection->command_type = AVRCP_CTYPE_NOTIFY; 237 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 238 connection->subunit_id = AVRCP_SUBUNIT_ID; 239 int pos = 0; 240 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 241 pos += 3; 242 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REGISTER_NOTIFICATION; 243 connection->cmd_operands[pos++] = 0; // reserved(upper 6) | packet_type -> 0 244 big_endian_store_16(connection->cmd_operands, pos, 5); // parameter length 245 pos += 2; 246 connection->cmd_operands[pos++] = event_id; 247 big_endian_store_32(connection->cmd_operands, pos, 1); // send notification on playback position every second, for other notifications it is ignored 248 pos += 4; 249 connection->cmd_operands_length = pos; 250 // AVRCP_SPEC_V14.pdf 166 251 // answer page 61 252 } 253 254 255 static void avrcp_parser_reset(avrcp_connection_t * connection){ 256 connection->list_offset = 0; 257 connection->num_attributes = 0; 258 connection->num_parsed_attributes = 0; 259 connection->parser_attribute_header_pos = 0; 260 connection->num_received_fragments = 0; 261 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 262 } 263 264 static void avrcp_controller_emit_now_playing_info_event_done(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, uint8_t status){ 265 uint8_t event[7]; 266 int pos = 0; 267 event[pos++] = HCI_EVENT_AVRCP_META; 268 event[pos++] = sizeof(event) - 2; 269 event[pos++] = AVRCP_SUBEVENT_NOW_PLAYING_INFO_DONE; 270 little_endian_store_16(event, pos, avrcp_cid); 271 pos += 2; 272 event[pos++] = ctype; 273 event[pos++] = status; 274 // printf_hexdump(event, pos); 275 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 276 } 277 278 static void avrcp_controller_emit_now_playing_info_event(btstack_packet_handler_t callback, uint16_t avrcp_cid, uint8_t ctype, avrcp_media_attribute_id_t attr_id, uint8_t * value, uint16_t value_len){ 279 uint8_t event[HCI_EVENT_BUFFER_SIZE]; 280 int pos = 0; 281 event[pos++] = HCI_EVENT_AVRCP_META; 282 // reserve one byte for subevent type and data len 283 int data_len_pos = pos; 284 pos++; 285 int subevent_type_pos = pos; 286 pos++; 287 little_endian_store_16(event, pos, avrcp_cid); 288 pos += 2; 289 event[pos++] = ctype; 290 291 switch (attr_id){ 292 case AVRCP_MEDIA_ATTR_TITLE: 293 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO; 294 event[pos++] = value_len; 295 (void)memcpy(event + pos, value, value_len); 296 break; 297 case AVRCP_MEDIA_ATTR_ARTIST: 298 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO; 299 event[pos++] = value_len; 300 (void)memcpy(event + pos, value, value_len); 301 break; 302 case AVRCP_MEDIA_ATTR_ALBUM: 303 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO; 304 event[pos++] = value_len; 305 (void)memcpy(event + pos, value, value_len); 306 break; 307 case AVRCP_MEDIA_ATTR_GENRE: 308 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO; 309 event[pos++] = value_len; 310 (void)memcpy(event + pos, value, value_len); 311 break; 312 case AVRCP_MEDIA_ATTR_SONG_LENGTH_MS: 313 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_SONG_LENGTH_MS_INFO; 314 if (value){ 315 little_endian_store_32(event, pos, btstack_atoi((char *)value)); 316 } else { 317 little_endian_store_32(event, pos, 0); 318 } 319 pos += 4; 320 break; 321 case AVRCP_MEDIA_ATTR_TRACK: 322 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO; 323 if (value){ 324 event[pos++] = btstack_atoi((char *)value); 325 } else { 326 event[pos++] = 0; 327 } 328 break; 329 case AVRCP_MEDIA_ATTR_TOTAL_NUM_ITEMS: 330 event[subevent_type_pos] = AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO; 331 if (value){ 332 event[pos++] = btstack_atoi((char *)value); 333 } else { 334 event[pos++] = 0; 335 } 336 break; 337 default: 338 break; 339 } 340 event[data_len_pos] = pos - 2; 341 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 342 } 343 344 static void avrcp_parser_process_byte(uint8_t byte, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 345 uint16_t attribute_total_value_len; 346 uint32_t attribute_id; 347 // printf("avrcp_parser_process_byte: %02x, state %02x\n", byte, connection->parser_state); 348 switch(connection->parser_state){ 349 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER: 350 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 351 connection->list_offset++; 352 353 if (connection->parser_attribute_header_pos < AVRCP_ATTRIBUTE_HEADER_LEN) return; 354 355 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 356 connection->attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE); 357 if (connection->attribute_value_len > 0){ 358 // get ready for attribute value 359 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 360 return; 361 } 362 363 // emit empty attribute 364 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 365 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 366 367 // done, see below 368 break; 369 370 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE: 371 connection->attribute_value[connection->attribute_value_offset++] = byte; 372 connection->list_offset++; 373 374 if (connection->attribute_value_offset < connection->attribute_value_len) return; 375 376 // emit (potentially partial) attribute 377 attribute_id = big_endian_read_32(connection->parser_attribute_header, 0); 378 avrcp_controller_emit_now_playing_info_event(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, (avrcp_media_attribute_id_t) attribute_id, connection->attribute_value, connection->attribute_value_len); 379 380 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 381 if (connection->attribute_value_offset < attribute_total_value_len){ 382 // ignore rest of attribute 383 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 384 return; 385 } 386 387 // done, see below 388 break; 389 390 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 391 connection->attribute_value_offset++; 392 connection->list_offset++; 393 394 attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 6); 395 if (connection->attribute_value_offset < attribute_total_value_len) return; 396 397 // done, see below 398 break; 399 400 default: 401 return; 402 } 403 404 // attribute fully read, check if more to come 405 if (connection->list_offset < connection->list_size){ 406 // more to come, reset parser 407 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 408 connection->parser_attribute_header_pos = 0; 409 connection->attribute_value_offset = 0; 410 } else { 411 // fully done 412 avrcp_parser_reset(connection); 413 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 0); 414 } 415 } 416 417 static void avrcp_source_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_connection_t * connection, avrcp_command_type_t ctype){ 418 int i; 419 for (i=0;i<num_bytes_to_read;i++){ 420 avrcp_parser_process_byte(packet[i], connection, ctype); 421 } 422 } 423 424 static uint8_t avrcp_controller_request_abort_continuation(avrcp_connection_t * connection){ 425 connection->state = AVCTP_W2_SEND_COMMAND; 426 connection->transaction_label++; 427 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 428 connection->command_type = AVRCP_CTYPE_CONTROL; 429 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 430 connection->subunit_id = AVRCP_SUBUNIT_ID; 431 int pos = 0; 432 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 433 pos += 3; 434 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_ABORT_CONTINUING_RESPONSE; // PDU ID 435 connection->cmd_operands[pos++] = 0; 436 // Parameter Length 437 connection->cmd_operands_length = 8; 438 big_endian_store_16(connection->cmd_operands, pos, 1); 439 pos += 2; 440 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 441 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 442 return ERROR_CODE_SUCCESS; 443 } 444 445 446 static uint8_t avrcp_controller_request_continue_response(avrcp_connection_t * connection){ 447 connection->state = AVCTP_W2_SEND_COMMAND; 448 connection->transaction_label++; 449 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 450 connection->command_type = AVRCP_CTYPE_CONTROL; 451 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 452 connection->subunit_id = AVRCP_SUBUNIT_ID; 453 int pos = 0; 454 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 455 pos += 3; 456 connection->cmd_operands[pos++] = AVRCP_PDU_ID_REQUEST_CONTINUING_RESPONSE; // PDU ID 457 connection->cmd_operands[pos++] = 0; 458 // Parameter Length 459 connection->cmd_operands_length = 8; 460 big_endian_store_16(connection->cmd_operands, pos, 1); 461 pos += 2; 462 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; 463 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 464 return ERROR_CODE_SUCCESS; 465 } 466 467 static void avrcp_handle_l2cap_data_packet_for_signaling_connection(avrcp_connection_t * connection, uint8_t *packet, uint16_t size){ 468 uint8_t operands[20]; 469 uint8_t opcode; 470 int pos = 3; 471 472 avrcp_command_type_t ctype = (avrcp_command_type_t) packet[pos++]; 473 uint8_t byte_value = packet[pos++]; 474 avrcp_subunit_type_t subunit_type = (avrcp_subunit_type_t) (byte_value >> 3); 475 avrcp_subunit_type_t subunit_id = (avrcp_subunit_type_t) (byte_value & 0x07); 476 opcode = packet[pos++]; 477 478 uint8_t pdu_id; 479 uint16_t param_length; 480 switch (avrcp_cmd_opcode(packet,size)){ 481 case AVRCP_CMD_OPCODE_SUBUNIT_INFO:{ 482 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 483 connection->state = AVCTP_CONNECTION_OPENED; 484 // operands: 485 (void)memcpy(operands, packet + pos, 5); 486 uint8_t unit_type = operands[1] >> 3; 487 uint8_t max_subunit_ID = operands[1] & 0x07; 488 log_info(" SUBUNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, max_subunit_ID %d", ctype, subunit_type, subunit_id, opcode, unit_type, max_subunit_ID); 489 break; 490 } 491 case AVRCP_CMD_OPCODE_UNIT_INFO:{ 492 if (connection->state != AVCTP_W2_RECEIVE_RESPONSE) return; 493 connection->state = AVCTP_CONNECTION_OPENED; 494 // operands: 495 (void)memcpy(operands, packet + pos, 5); 496 uint8_t unit_type = operands[1] >> 3; 497 uint8_t unit = operands[1] & 0x07; 498 uint32_t company_id = (operands[2] << 16) | (operands[3] << 8) | operands[4]; 499 log_info(" UNIT INFO response: ctype 0x%02x (0C), subunit_type 0x%02x (1F), subunit_id 0x%02x (07), opcode 0x%02x (30), unit_type 0x%02x, unit %d, company_id 0x%06" PRIx32, 500 ctype, subunit_type, subunit_id, opcode, unit_type, unit, company_id); 501 break; 502 } 503 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 504 if ((size - pos) < 7) { 505 log_error("avrcp: wrong packet size"); 506 return; 507 }; 508 // operands: 509 (void)memcpy(operands, packet + pos, 7); 510 pos += 7; 511 pdu_id = operands[3]; 512 513 if ((connection->state != AVCTP_W2_RECEIVE_RESPONSE) && (pdu_id != AVRCP_PDU_ID_REGISTER_NOTIFICATION)){ 514 log_info("AVRCP_CMD_OPCODE_VENDOR_DEPENDENT state %d", connection->state); 515 return; 516 } 517 connection->state = AVCTP_CONNECTION_OPENED; 518 519 param_length = big_endian_read_16(operands, 5); 520 521 log_info(" VENDOR DEPENDENT response: pdu id 0x%02x, param_length %d, status %s", pdu_id, param_length, avrcp_ctype2str(ctype)); 522 switch (pdu_id){ 523 case AVRCP_PDU_ID_GetCurrentPlayerApplicationSettingValue:{ 524 uint8_t num_attributes = packet[pos++]; 525 int i; 526 avrcp_repeat_mode_t repeat_mode = AVRCP_REPEAT_MODE_INVALID; 527 avrcp_shuffle_mode_t shuffle_mode = AVRCP_SHUFFLE_MODE_INVALID; 528 for (i = 0; i < num_attributes; i++){ 529 uint8_t attribute_id = packet[pos++]; 530 uint8_t value = packet[pos++]; 531 switch (attribute_id){ 532 case 0x02: 533 repeat_mode = (avrcp_repeat_mode_t) value; 534 break; 535 case 0x03: 536 shuffle_mode = (avrcp_shuffle_mode_t) value; 537 break; 538 default: 539 break; 540 } 541 } 542 avrcp_emit_repeat_and_shuffle_mode(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, repeat_mode, shuffle_mode); 543 break; 544 } 545 case AVRCP_PDU_ID_SetPlayerApplicationSettingValue:{ 546 uint8_t event[6]; 547 int offset = 0; 548 event[offset++] = HCI_EVENT_AVRCP_META; 549 event[offset++] = sizeof(event) - 2; 550 event[offset++] = AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE; 551 little_endian_store_16(event, offset, connection->avrcp_cid); 552 offset += 2; 553 event[offset++] = ctype; 554 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 555 break; 556 } 557 case AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME:{ 558 uint8_t event[7]; 559 int offset = 0; 560 event[offset++] = HCI_EVENT_AVRCP_META; 561 event[offset++] = sizeof(event) - 2; 562 event[offset++] = AVRCP_SUBEVENT_SET_ABSOLUTE_VOLUME_RESPONSE; 563 little_endian_store_16(event, offset, connection->avrcp_cid); 564 offset += 2; 565 event[offset++] = ctype; 566 event[offset++] = packet[pos++]; 567 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 568 break; 569 } 570 case AVRCP_PDU_ID_GET_CAPABILITIES:{ 571 avrcp_capability_id_t capability_id = (avrcp_capability_id_t) packet[pos++]; 572 uint8_t capability_count = packet[pos++]; 573 int i; 574 switch (capability_id){ 575 case AVRCP_CAPABILITY_ID_COMPANY: 576 for (i = 0; i < capability_count; i++){ 577 uint32_t company_id = big_endian_read_24(packet, pos); 578 pos += 3; 579 log_info(" 0x%06" PRIx32 ", ", company_id); 580 } 581 break; 582 case AVRCP_CAPABILITY_ID_EVENT: 583 for (i = 0; i < capability_count; i++){ 584 uint8_t event_id = packet[pos++]; 585 log_info(" 0x%02x %s", event_id, avrcp_event2str(event_id)); 586 } 587 break; 588 } 589 break; 590 } 591 case AVRCP_PDU_ID_GET_PLAY_STATUS:{ 592 uint32_t song_length = big_endian_read_32(packet, pos); 593 pos += 4; 594 uint32_t song_position = big_endian_read_32(packet, pos); 595 pos += 4; 596 uint8_t play_status = packet[pos]; 597 598 uint8_t event[15]; 599 int offset = 0; 600 event[offset++] = HCI_EVENT_AVRCP_META; 601 event[offset++] = sizeof(event) - 2; 602 event[offset++] = AVRCP_SUBEVENT_PLAY_STATUS; 603 little_endian_store_16(event, offset, connection->avrcp_cid); 604 offset += 2; 605 event[offset++] = ctype; 606 little_endian_store_32(event, offset, song_length); 607 offset += 4; 608 little_endian_store_32(event, offset, song_position); 609 offset += 4; 610 event[offset++] = play_status; 611 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 612 break; 613 } 614 case AVRCP_PDU_ID_REGISTER_NOTIFICATION:{ 615 avrcp_notification_event_id_t event_id = (avrcp_notification_event_id_t) packet[pos++]; 616 uint16_t event_mask = (1 << event_id); 617 uint16_t reset_event_mask = ~event_mask; 618 switch (ctype){ 619 case AVRCP_CTYPE_RESPONSE_INTERIM: 620 // register as enabled 621 connection->notifications_enabled |= event_mask; 622 break; 623 case AVRCP_CTYPE_RESPONSE_CHANGED_STABLE: 624 // received change, event is considered deregistered 625 // we are re-enabling it automatically, if it is not 626 // explicitly disabled 627 connection->notifications_enabled &= reset_event_mask; 628 if (! (connection->notifications_to_deregister & event_mask)){ 629 avrcp_register_notification(connection, event_id); 630 } else { 631 connection->notifications_to_deregister &= reset_event_mask; 632 } 633 break; 634 default: 635 connection->notifications_to_register &= reset_event_mask; 636 connection->notifications_enabled &= reset_event_mask; 637 connection->notifications_to_deregister &= reset_event_mask; 638 break; 639 } 640 641 switch (event_id){ 642 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED:{ 643 uint32_t song_position = big_endian_read_32(packet, pos); 644 uint8_t event[10]; 645 int offset = 0; 646 event[offset++] = HCI_EVENT_AVRCP_META; 647 event[offset++] = sizeof(event) - 2; 648 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED; 649 little_endian_store_16(event, offset, connection->avrcp_cid); 650 offset += 2; 651 event[offset++] = ctype; 652 little_endian_store_32(event, offset, song_position); 653 offset += 4; 654 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 655 break; 656 } 657 case AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED:{ 658 uint8_t event[7]; 659 int offset = 0; 660 event[offset++] = HCI_EVENT_AVRCP_META; 661 event[offset++] = sizeof(event) - 2; 662 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED; 663 little_endian_store_16(event, offset, connection->avrcp_cid); 664 offset += 2; 665 event[offset++] = ctype; 666 event[offset++] = packet[pos]; 667 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 668 break; 669 } 670 case AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED:{ 671 uint8_t event[6]; 672 int offset = 0; 673 event[offset++] = HCI_EVENT_AVRCP_META; 674 event[offset++] = sizeof(event) - 2; 675 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED; 676 little_endian_store_16(event, offset, connection->avrcp_cid); 677 offset += 2; 678 event[offset++] = ctype; 679 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 680 break; 681 } 682 case AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED:{ 683 uint8_t event[6]; 684 int offset = 0; 685 event[offset++] = HCI_EVENT_AVRCP_META; 686 event[offset++] = sizeof(event) - 2; 687 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED; 688 little_endian_store_16(event, offset, connection->avrcp_cid); 689 offset += 2; 690 event[offset++] = ctype; 691 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 692 break; 693 } 694 case AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED:{ 695 uint8_t event[6]; 696 int offset = 0; 697 event[offset++] = HCI_EVENT_AVRCP_META; 698 event[offset++] = sizeof(event) - 2; 699 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED; 700 little_endian_store_16(event, offset, connection->avrcp_cid); 701 offset += 2; 702 event[offset++] = ctype; 703 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 704 break; 705 } 706 case AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED:{ 707 uint8_t event[7]; 708 int offset = 0; 709 event[offset++] = HCI_EVENT_AVRCP_META; 710 event[offset++] = sizeof(event) - 2; 711 event[offset++] = AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED; 712 little_endian_store_16(event, offset, connection->avrcp_cid); 713 offset += 2; 714 event[offset++] = ctype; 715 event[offset++] = packet[pos++] & 0x7F; 716 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 717 break; 718 } 719 case AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED:{ 720 uint8_t event[7]; 721 int offset = 0; 722 event[offset++] = HCI_EVENT_AVRCP_META; 723 event[offset++] = sizeof(event) - 2; 724 event[offset++] = AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED; 725 little_endian_store_16(event, offset, connection->avrcp_cid); 726 offset += 2; 727 event[offset++] = ctype; 728 event[offset++] = packet[pos++] & 0x7F; 729 (*avrcp_controller_context.avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 730 break; 731 } 732 733 default: 734 log_info("avrcp: not implemented"); 735 break; 736 } 737 if (connection->notifications_to_register != 0){ 738 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 739 } 740 break; 741 } 742 743 case AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES:{ 744 avrcp_packet_type_t packet_type = (avrcp_packet_type_t) (operands[4] & 0x03); 745 switch (packet_type){ 746 case AVRCP_START_PACKET: 747 case AVRCP_SINGLE_PACKET: 748 avrcp_parser_reset(connection); 749 connection->list_size = param_length; 750 connection->num_attributes = packet[pos++]; 751 752 avrcp_source_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 753 754 if (packet_type == AVRCP_START_PACKET){ 755 avrcp_controller_request_continue_response(connection); 756 } 757 break; 758 case AVRCP_CONTINUE_PACKET: 759 case AVRCP_END_PACKET: 760 connection->num_received_fragments++; 761 if (connection->num_received_fragments < connection->max_num_fragments){ 762 avrcp_source_parse_and_emit_element_attrs(packet+pos, size-pos, connection, ctype); 763 if (packet_type == AVRCP_CONTINUE_PACKET){ 764 avrcp_controller_request_continue_response(connection); 765 } 766 } else { 767 avrcp_controller_request_abort_continuation(connection); 768 avrcp_controller_emit_now_playing_info_event_done(avrcp_controller_context.avrcp_callback, connection->avrcp_cid, ctype, 1); 769 avrcp_parser_reset(connection); 770 } 771 break; 772 } 773 } 774 default: 775 break; 776 } 777 break; 778 case AVRCP_CMD_OPCODE_PASS_THROUGH:{ 779 // 0x80 | connection->cmd_operands[0] 780 uint8_t operation_id = packet[pos++]; 781 switch (connection->state){ 782 case AVCTP_W2_RECEIVE_PRESS_RESPONSE: 783 if (connection->continuous_fast_forward_cmd){ 784 connection->state = AVCTP_W4_STOP; 785 } else { 786 connection->state = AVCTP_W2_SEND_RELEASE_COMMAND; 787 } 788 break; 789 case AVCTP_W2_RECEIVE_RESPONSE: 790 connection->state = AVCTP_CONNECTION_OPENED; 791 break; 792 default: 793 break; 794 } 795 if (connection->state == AVCTP_W4_STOP){ 796 avrcp_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_START, connection->avrcp_cid, ctype, operation_id); 797 } 798 if (connection->state == AVCTP_CONNECTION_OPENED) { 799 // RELEASE response 800 operation_id = operation_id & 0x7F; 801 avrcp_emit_operation_status(avrcp_controller_context.avrcp_callback, AVRCP_SUBEVENT_OPERATION_COMPLETE, connection->avrcp_cid, ctype, operation_id); 802 } 803 if (connection->state == AVCTP_W2_SEND_RELEASE_COMMAND){ 804 // PRESS response 805 request_pass_through_release_control_cmd(connection); 806 } 807 break; 808 } 809 default: 810 break; 811 } 812 813 // trigger pending notification reqistrations 814 if ((connection->state == AVCTP_CONNECTION_OPENED) && connection->notifications_to_register){ 815 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 816 } 817 } 818 819 static void avrcp_controller_handle_can_send_now(avrcp_connection_t * connection){ 820 int i; 821 switch (connection->state){ 822 case AVCTP_W2_SEND_PRESS_COMMAND: 823 connection->state = AVCTP_W2_RECEIVE_PRESS_RESPONSE; 824 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 825 break; 826 case AVCTP_W2_SEND_COMMAND: 827 case AVCTP_W2_SEND_RELEASE_COMMAND: 828 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 829 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 830 break; 831 case AVCTP_CONNECTION_OPENED: 832 if (connection->notifications_to_register != 0){ 833 for (i = 1; i <= AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED; i++){ 834 if (connection->notifications_to_register & (1<<i)){ 835 connection->notifications_to_register &= ~ (1 << i); 836 avrcp_prepare_notification(connection, (avrcp_notification_event_id_t) i); 837 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 838 avrcp_send_cmd(connection, AVRCP_SINGLE_PACKET); 839 return; 840 } 841 } 842 } 843 return; 844 case AVCTP_W2_SEND_FRAGMENTED_COMMAND: 845 if (connection->cmd_operands_fragmented_pos == 0){ 846 avrcp_send_cmd(connection, AVRCP_START_PACKET); 847 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 848 } else { 849 if ((connection->cmd_operands_fragmented_len - connection->cmd_operands_fragmented_pos) > avrcp_get_max_payload_size_for_packet_type(AVRCP_CONTINUE_PACKET)){ 850 avrcp_send_cmd(connection, AVRCP_CONTINUE_PACKET); 851 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 852 } else { 853 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 854 avrcp_send_cmd(connection, AVRCP_END_PACKET); 855 } 856 } 857 default: 858 return; 859 } 860 } 861 862 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 863 avrcp_connection_t * connection; 864 865 switch (packet_type) { 866 case L2CAP_DATA_PACKET: 867 connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 868 if (!connection) break; 869 avrcp_handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 870 break; 871 872 case HCI_EVENT_PACKET: 873 switch (hci_event_packet_get_type(packet)){ 874 case HCI_EVENT_AVRCP_META: 875 // forward to app 876 (*avrcp_controller_context.avrcp_callback)(packet_type, channel, packet, size); 877 break; 878 879 case L2CAP_EVENT_CAN_SEND_NOW: 880 connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, channel); 881 if (!connection) break; 882 avrcp_controller_handle_can_send_now(connection); 883 break; 884 default: 885 break; 886 } 887 default: 888 break; 889 } 890 } 891 892 void avrcp_controller_init(void){ 893 avrcp_controller_context.role = AVRCP_CONTROLLER; 894 avrcp_controller_context.packet_handler = avrcp_controller_packet_handler; 895 avrcp_register_controller_packet_handler(&avrcp_controller_packet_handler); 896 } 897 898 void avrcp_controller_register_packet_handler(btstack_packet_handler_t callback){ 899 btstack_assert(callback != NULL); 900 avrcp_controller_context.avrcp_callback = callback; 901 } 902 903 uint8_t avrcp_controller_unit_info(uint16_t avrcp_cid){ 904 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 905 if (!connection){ 906 log_error("avrcp_unit_info: could not find a connection."); 907 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 908 } 909 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 910 connection->state = AVCTP_W2_SEND_COMMAND; 911 912 connection->transaction_label++; 913 connection->command_opcode = AVRCP_CMD_OPCODE_UNIT_INFO; 914 connection->command_type = AVRCP_CTYPE_STATUS; 915 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 916 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 917 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 918 connection->cmd_operands_length = 5; 919 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 920 return ERROR_CODE_SUCCESS; 921 } 922 923 uint8_t avrcp_controller_subunit_info(uint16_t avrcp_cid){ 924 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 925 if (!connection){ 926 log_error("avrcp_unit_info: could not find a connection."); 927 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 928 } 929 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 930 connection->state = AVCTP_W2_SEND_COMMAND; 931 932 connection->transaction_label++; 933 connection->command_opcode = AVRCP_CMD_OPCODE_SUBUNIT_INFO; 934 connection->command_type = AVRCP_CTYPE_STATUS; 935 connection->subunit_type = AVRCP_SUBUNIT_TYPE_UNIT; //vendor unique 936 connection->subunit_id = AVRCP_SUBUNIT_ID_IGNORE; 937 memset(connection->cmd_operands, 0xFF, connection->cmd_operands_length); 938 connection->cmd_operands[0] = 7; // page: 0, extention_code: 7 939 connection->cmd_operands_length = 5; 940 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 941 return ERROR_CODE_SUCCESS; 942 } 943 944 static uint8_t avrcp_controller_get_capabilities(uint16_t avrcp_cid, uint8_t capability_id){ 945 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 946 if (!connection){ 947 log_error("avrcp_get_capabilities: could not find a connection."); 948 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 949 } 950 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 951 connection->state = AVCTP_W2_SEND_COMMAND; 952 953 connection->transaction_label++; 954 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 955 connection->command_type = AVRCP_CTYPE_STATUS; 956 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 957 connection->subunit_id = AVRCP_SUBUNIT_ID; 958 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 959 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_CAPABILITIES; // PDU ID 960 connection->cmd_operands[4] = 0; 961 big_endian_store_16(connection->cmd_operands, 5, 1); // parameter length 962 connection->cmd_operands[7] = capability_id; // capability ID 963 connection->cmd_operands_length = 8; 964 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 965 return ERROR_CODE_SUCCESS; 966 } 967 968 uint8_t avrcp_controller_get_supported_company_ids(uint16_t avrcp_cid){ 969 return avrcp_controller_get_capabilities(avrcp_cid, AVRCP_CAPABILITY_ID_COMPANY); 970 } 971 972 uint8_t avrcp_controller_get_supported_events(uint16_t avrcp_cid){ 973 return avrcp_controller_get_capabilities(avrcp_cid, AVRCP_CAPABILITY_ID_EVENT); 974 } 975 976 977 uint8_t avrcp_controller_play(uint16_t avrcp_cid){ 978 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 979 } 980 981 uint8_t avrcp_controller_stop(uint16_t avrcp_cid){ 982 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 983 } 984 985 uint8_t avrcp_controller_pause(uint16_t avrcp_cid){ 986 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 987 } 988 989 uint8_t avrcp_controller_forward(uint16_t avrcp_cid){ 990 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 991 } 992 993 uint8_t avrcp_controller_backward(uint16_t avrcp_cid){ 994 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 995 } 996 997 uint8_t avrcp_controller_volume_up(uint16_t avrcp_cid){ 998 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 999 } 1000 1001 uint8_t avrcp_controller_volume_down(uint16_t avrcp_cid){ 1002 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1003 } 1004 1005 uint8_t avrcp_controller_mute(uint16_t avrcp_cid){ 1006 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1007 } 1008 1009 uint8_t avrcp_controller_skip(uint16_t avrcp_cid){ 1010 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_SKIP, 0); 1011 } 1012 1013 uint8_t avrcp_controller_fast_forward(uint16_t avrcp_cid){ 1014 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1015 } 1016 1017 uint8_t avrcp_controller_rewind(uint16_t avrcp_cid){ 1018 return request_single_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1019 } 1020 1021 1022 /* start cmds */ 1023 1024 uint8_t avrcp_controller_release_press_and_hold_cmd(uint16_t avrcp_cid){ 1025 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1026 if (!connection){ 1027 log_error("avrcp_stop_play: could not find a connection."); 1028 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1029 } 1030 if (connection->state != AVCTP_W4_STOP) return ERROR_CODE_COMMAND_DISALLOWED; 1031 return request_pass_through_release_control_cmd(connection); 1032 } 1033 1034 uint8_t avrcp_controller_press_and_hold_play(uint16_t avrcp_cid){ 1035 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PLAY, 0); 1036 } 1037 uint8_t avrcp_controller_press_and_hold_stop(uint16_t avrcp_cid){ 1038 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_STOP, 0); 1039 } 1040 uint8_t avrcp_controller_press_and_hold_pause(uint16_t avrcp_cid){ 1041 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_PAUSE, 0); 1042 } 1043 uint8_t avrcp_controller_press_and_hold_forward(uint16_t avrcp_cid){ 1044 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FORWARD, 0); 1045 } 1046 uint8_t avrcp_controller_press_and_hold_backward(uint16_t avrcp_cid){ 1047 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_BACKWARD, 0); 1048 } 1049 uint8_t avrcp_controller_press_and_hold_fast_forward(uint16_t avrcp_cid){ 1050 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_FAST_FORWARD, 0); 1051 } 1052 uint8_t avrcp_controller_press_and_hold_rewind(uint16_t avrcp_cid){ 1053 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND, 0); 1054 } 1055 uint8_t avrcp_controller_press_and_hold_volume_up(uint16_t avrcp_cid){ 1056 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_UP, 0); 1057 } 1058 uint8_t avrcp_controller_press_and_hold_volume_down(uint16_t avrcp_cid){ 1059 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_VOLUME_DOWN, 0); 1060 } 1061 uint8_t avrcp_controller_press_and_hold_mute(uint16_t avrcp_cid){ 1062 return request_continuous_pass_through_press_control_cmd(avrcp_cid, AVRCP_OPERATION_ID_MUTE, 0); 1063 } 1064 1065 1066 /* stop continuous cmds */ 1067 1068 uint8_t avrcp_controller_get_play_status(uint16_t avrcp_cid){ 1069 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1070 if (!connection){ 1071 log_error("avrcp_get_play_status: could not find a connection."); 1072 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1073 } 1074 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1075 connection->state = AVCTP_W2_SEND_COMMAND; 1076 connection->transaction_label++; 1077 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1078 connection->command_type = AVRCP_CTYPE_STATUS; 1079 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1080 connection->subunit_id = AVRCP_SUBUNIT_ID; 1081 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1082 connection->cmd_operands[3] = AVRCP_PDU_ID_GET_PLAY_STATUS; 1083 connection->cmd_operands[4] = 0; // reserved(upper 6) | packet_type -> 0 1084 big_endian_store_16(connection->cmd_operands, 5, 0); // parameter length 1085 connection->cmd_operands_length = 7; 1086 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1087 return ERROR_CODE_SUCCESS; 1088 } 1089 1090 uint8_t avrcp_controller_enable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1091 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1092 if (!connection){ 1093 log_error("avrcp_get_play_status: could not find a connection."); 1094 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1095 } 1096 avrcp_register_notification(connection, event_id); 1097 return ERROR_CODE_SUCCESS; 1098 } 1099 1100 uint8_t avrcp_controller_disable_notification(uint16_t avrcp_cid, avrcp_notification_event_id_t event_id){ 1101 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1102 if (!connection){ 1103 log_error("avrcp_get_play_status: could not find a connection."); 1104 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1105 } 1106 connection->notifications_to_deregister |= (1 << event_id); 1107 return ERROR_CODE_SUCCESS; 1108 } 1109 1110 uint8_t avrcp_controller_set_addressed_player(uint16_t avrcp_cid, uint16_t addressed_player_id){ 1111 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1112 if (!connection){ 1113 log_error("avrcp_get_capabilities: could not find a connection."); 1114 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1115 } 1116 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1117 connection->state = AVCTP_W2_SEND_COMMAND; 1118 1119 connection->transaction_label++; 1120 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1121 connection->command_type = AVRCP_CTYPE_CONTROL; 1122 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1123 connection->subunit_id = AVRCP_SUBUNIT_ID; 1124 int pos = 0; 1125 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1126 pos += 3; 1127 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ADDRESSED_PLAYER; // PDU ID 1128 connection->cmd_operands[pos++] = 0; 1129 1130 // Parameter Length 1131 big_endian_store_16(connection->cmd_operands, pos, 2); 1132 pos += 2; 1133 1134 big_endian_store_16(connection->cmd_operands, pos, addressed_player_id); 1135 pos += 2; 1136 1137 connection->cmd_operands_length = pos; 1138 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1139 return ERROR_CODE_SUCCESS; 1140 } 1141 1142 uint8_t avrcp_controller_get_now_playing_info(uint16_t avrcp_cid){ 1143 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1144 if (!connection){ 1145 log_error("avrcp_get_capabilities: could not find a connection."); 1146 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1147 } 1148 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1149 connection->state = AVCTP_W2_SEND_COMMAND; 1150 1151 connection->transaction_label++; 1152 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1153 connection->command_type = AVRCP_CTYPE_STATUS; 1154 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1155 connection->subunit_id = AVRCP_SUBUNIT_ID; 1156 int pos = 0; 1157 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1158 pos += 3; 1159 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ELEMENT_ATTRIBUTES; // PDU ID 1160 connection->cmd_operands[pos++] = 0; 1161 1162 // Parameter Length 1163 big_endian_store_16(connection->cmd_operands, pos, 9); 1164 pos += 2; 1165 1166 // write 8 bytes value 1167 memset(connection->cmd_operands + pos, 0, 8); // identifier: PLAYING 1168 pos += 8; 1169 1170 connection->cmd_operands[pos++] = 0; // attribute count, if 0 get all attributes 1171 // every attribute is 4 bytes long 1172 1173 connection->cmd_operands_length = pos; 1174 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1175 return ERROR_CODE_SUCCESS; 1176 } 1177 1178 uint8_t avrcp_controller_set_absolute_volume(uint16_t avrcp_cid, uint8_t volume){ 1179 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1180 if (!connection){ 1181 log_error("avrcp_get_capabilities: could not find a connection."); 1182 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1183 } 1184 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1185 connection->state = AVCTP_W2_SEND_COMMAND; 1186 1187 connection->transaction_label++; 1188 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1189 connection->command_type = AVRCP_CTYPE_CONTROL; 1190 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1191 connection->subunit_id = AVRCP_SUBUNIT_ID; 1192 int pos = 0; 1193 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1194 pos += 3; 1195 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_ABSOLUTE_VOLUME; // PDU ID 1196 connection->cmd_operands[pos++] = 0; 1197 1198 // Parameter Length 1199 big_endian_store_16(connection->cmd_operands, pos, 1); 1200 pos += 2; 1201 connection->cmd_operands[pos++] = volume; 1202 1203 connection->cmd_operands_length = pos; 1204 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1205 return ERROR_CODE_SUCCESS; 1206 } 1207 1208 uint8_t avrcp_controller_query_shuffle_and_repeat_modes(uint16_t avrcp_cid){ 1209 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1210 if (!connection){ 1211 log_error("avrcp_get_capabilities: could not find a connection."); 1212 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1213 } 1214 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1215 connection->state = AVCTP_W2_SEND_COMMAND; 1216 1217 connection->transaction_label++; 1218 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1219 connection->command_type = AVRCP_CTYPE_STATUS; 1220 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1221 connection->subunit_id = AVRCP_SUBUNIT_ID; 1222 big_endian_store_24(connection->cmd_operands, 0, BT_SIG_COMPANY_ID); 1223 connection->cmd_operands[3] = AVRCP_PDU_ID_GetCurrentPlayerApplicationSettingValue; // PDU ID 1224 connection->cmd_operands[4] = 0; 1225 big_endian_store_16(connection->cmd_operands, 5, 5); // parameter length 1226 connection->cmd_operands[7] = 4; // NumPlayerApplicationSettingAttributeID 1227 // PlayerApplicationSettingAttributeID1 AVRCP Spec, Appendix F, 133 1228 connection->cmd_operands[8] = 0x01; // equalizer (1-OFF, 2-ON) 1229 connection->cmd_operands[9] = 0x02; // repeat (1-off, 2-single track, 3-all tracks, 4-group repeat) 1230 connection->cmd_operands[10] = 0x03; // shuffle (1-off, 2-all tracks, 3-group shuffle) 1231 connection->cmd_operands[11] = 0x04; // scan (1-off, 2-all tracks, 3-group scan) 1232 connection->cmd_operands_length = 12; 1233 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1234 return ERROR_CODE_SUCCESS; 1235 } 1236 1237 static uint8_t avrcp_controller_set_current_player_application_setting_value(uint16_t avrcp_cid, uint8_t attr_id, uint8_t attr_value){ 1238 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1239 if (!connection){ 1240 log_error("avrcp_get_capabilities: could not find a connection."); 1241 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1242 } 1243 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1244 connection->state = AVCTP_W2_SEND_COMMAND; 1245 1246 connection->transaction_label++; 1247 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1248 connection->command_type = AVRCP_CTYPE_CONTROL; 1249 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1250 connection->subunit_id = AVRCP_SUBUNIT_ID; 1251 int pos = 0; 1252 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1253 pos += 3; 1254 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SetPlayerApplicationSettingValue; // PDU ID 1255 connection->cmd_operands[pos++] = 0; 1256 // Parameter Length 1257 big_endian_store_16(connection->cmd_operands, pos, 3); 1258 pos += 2; 1259 connection->cmd_operands[pos++] = 2; 1260 connection->cmd_operands_length = pos; 1261 connection->cmd_operands[pos++] = attr_id; 1262 connection->cmd_operands[pos++] = attr_value; 1263 connection->cmd_operands_length = pos; 1264 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1265 return ERROR_CODE_SUCCESS; 1266 } 1267 1268 uint8_t avrcp_controller_set_shuffle_mode(uint16_t avrcp_cid, avrcp_shuffle_mode_t mode){ 1269 if ((mode < AVRCP_SHUFFLE_MODE_OFF) || (mode > AVRCP_SHUFFLE_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1270 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x03, mode); 1271 } 1272 1273 uint8_t avrcp_controller_set_repeat_mode(uint16_t avrcp_cid, avrcp_repeat_mode_t mode){ 1274 if ((mode < AVRCP_REPEAT_MODE_OFF) || (mode > AVRCP_REPEAT_MODE_GROUP)) return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 1275 return avrcp_controller_set_current_player_application_setting_value(avrcp_cid, 0x02, mode); 1276 } 1277 1278 uint8_t avrcp_controller_play_item_for_scope(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1279 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1280 if (!connection){ 1281 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1282 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1283 } 1284 if (connection->state != AVCTP_CONNECTION_OPENED){ 1285 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1286 return ERROR_CODE_COMMAND_DISALLOWED; 1287 } 1288 connection->state = AVCTP_W2_SEND_COMMAND; 1289 1290 connection->transaction_label++; 1291 connection->command_type = AVRCP_CTYPE_CONTROL; 1292 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1293 connection->subunit_id = AVRCP_SUBUNIT_ID; 1294 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1295 int pos = 0; 1296 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1297 pos += 3; 1298 connection->cmd_operands[pos++] = AVRCP_PDU_ID_PLAY_ITEM; // PDU ID 1299 // reserved 1300 connection->cmd_operands[pos++] = 0; 1301 // Parameter Length 1302 big_endian_store_16(connection->cmd_operands, pos, 11); 1303 pos += 2; 1304 connection->cmd_operands[pos++] = scope; 1305 memset(&connection->cmd_operands[pos], 0, 8); 1306 if (uid){ 1307 (void)memcpy(&connection->cmd_operands[pos], uid, 8); 1308 } 1309 pos += 8; 1310 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1311 pos += 2; 1312 connection->cmd_operands_length = pos; 1313 1314 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1315 return ERROR_CODE_SUCCESS; 1316 } 1317 1318 uint8_t avrcp_controller_add_item_from_scope_to_now_playing_list(uint16_t avrcp_cid, uint8_t * uid, uint16_t uid_counter, avrcp_browsing_scope_t scope){ 1319 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1320 if (!connection){ 1321 log_error("Could not find a connection with cid 0%02x.", avrcp_cid); 1322 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1323 } 1324 if (connection->state != AVCTP_CONNECTION_OPENED){ 1325 log_error("Connection in wrong state, expected %d, received %d", AVCTP_CONNECTION_OPENED, connection->state); 1326 return ERROR_CODE_COMMAND_DISALLOWED; 1327 } 1328 connection->state = AVCTP_W2_SEND_COMMAND; 1329 1330 connection->transaction_label++; 1331 connection->command_type = AVRCP_CTYPE_CONTROL; 1332 connection->subunit_type = AVRCP_SUBUNIT_TYPE_PANEL; 1333 connection->subunit_id = AVRCP_SUBUNIT_ID; 1334 connection->command_opcode = AVRCP_CMD_OPCODE_VENDOR_DEPENDENT; 1335 int pos = 0; 1336 big_endian_store_24(connection->cmd_operands, pos, BT_SIG_COMPANY_ID); 1337 pos += 3; 1338 connection->cmd_operands[pos++] = AVRCP_PDU_ID_ADD_TO_NOW_PLAYING; // PDU ID 1339 // reserved 1340 connection->cmd_operands[pos++] = 0; 1341 // Parameter Length 1342 big_endian_store_16(connection->cmd_operands, pos, 11); 1343 pos += 2; 1344 connection->cmd_operands[pos++] = scope; 1345 memset(&connection->cmd_operands[pos], 0, 8); 1346 if (uid){ 1347 (void)memcpy(&connection->cmd_operands[pos], uid, 8); 1348 } 1349 pos += 8; 1350 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 1351 pos += 2; 1352 connection->cmd_operands_length = pos; 1353 1354 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1355 return ERROR_CODE_SUCCESS; 1356 } 1357 1358 uint8_t avrcp_controller_set_max_num_fragments(uint16_t avrcp_cid, uint8_t max_num_fragments){ 1359 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1360 if (!connection){ 1361 log_error("avrcp_controller_play_item: could not find a connection."); 1362 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1363 } 1364 connection->max_num_fragments = max_num_fragments; 1365 return ERROR_CODE_SUCCESS; 1366 } 1367 1368 uint8_t avrcp_controller_send_custom_command(uint16_t avrcp_cid, avrcp_command_type_t command_type, avrcp_subunit_type_t subunit_type, avrcp_subunit_id_t subunit_id, avrcp_command_opcode_t command_opcode, const uint8_t * command_buffer, uint16_t command_len){ 1369 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1370 if (!connection){ 1371 log_error("avrcp_controller_play_item: could not find a connection."); 1372 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1373 } 1374 1375 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1376 connection->state = AVCTP_W2_SEND_FRAGMENTED_COMMAND; 1377 1378 connection->transaction_label++; 1379 connection->command_opcode = command_opcode; 1380 connection->command_type = command_type; 1381 connection->subunit_type = subunit_type; 1382 connection->subunit_id = subunit_id; 1383 connection->cmd_operands_fragmented_buffer = command_buffer; 1384 connection->cmd_operands_fragmented_pos = 0; 1385 connection->cmd_operands_fragmented_len = command_len; 1386 1387 avrcp_request_can_send_now(connection, connection->l2cap_signaling_cid); 1388 return ERROR_CODE_SUCCESS; 1389 } 1390