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