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_browsing_controller.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_browsing_controller.h" 48 49 #define PSM_AVCTP_BROWSING 0x001b 50 51 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context); 52 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 53 54 static avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid, avrcp_context_t * context){ 55 btstack_linked_list_iterator_t it; 56 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 57 while (btstack_linked_list_iterator_has_next(&it)){ 58 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 59 if (connection->avrcp_browsing_cid != browsing_cid) continue; 60 return connection; 61 } 62 return NULL; 63 } 64 65 static avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid, avrcp_context_t * context){ 66 btstack_linked_list_iterator_t it; 67 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 68 while (btstack_linked_list_iterator_has_next(&it)){ 69 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 70 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 71 return connection; 72 } 73 return NULL; 74 } 75 76 static avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 77 btstack_linked_list_iterator_t it; 78 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 79 while (btstack_linked_list_iterator_has_next(&it)){ 80 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 81 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 82 return connection->browsing_connection; 83 } 84 return NULL; 85 } 86 87 static void avrcp_emit_browsing_connection_established(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 88 if (!callback) return; 89 uint8_t event[12]; 90 int pos = 0; 91 event[pos++] = HCI_EVENT_AVRCP_META; 92 event[pos++] = sizeof(event) - 2; 93 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 94 event[pos++] = status; 95 reverse_bd_addr(addr,&event[pos]); 96 pos += 6; 97 little_endian_store_16(event, pos, browsing_cid); 98 pos += 2; 99 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 100 } 101 102 static void avrcp_emit_incoming_browsing_connection(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr){ 103 if (!callback) return; 104 uint8_t event[11]; 105 int pos = 0; 106 event[pos++] = HCI_EVENT_AVRCP_META; 107 event[pos++] = sizeof(event) - 2; 108 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 109 reverse_bd_addr(addr,&event[pos]); 110 pos += 6; 111 little_endian_store_16(event, pos, browsing_cid); 112 pos += 2; 113 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 114 } 115 116 static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){ 117 if (!callback) return; 118 uint8_t event[5]; 119 int pos = 0; 120 event[pos++] = HCI_EVENT_AVRCP_META; 121 event[pos++] = sizeof(event) - 2; 122 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 123 little_endian_store_16(event, pos, browsing_cid); 124 pos += 2; 125 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 126 } 127 128 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 129 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 130 memset(connection, 0, sizeof(avrcp_browsing_connection_t)); 131 connection->state = AVCTP_CONNECTION_IDLE; 132 connection->transaction_label = 0xFF; 133 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(); 134 avrcp_connection->browsing_connection = connection; 135 return connection; 136 } 137 138 static uint8_t avrcp_browsing_connect(bd_addr_t remote_addr, avrcp_context_t * context, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * browsing_cid){ 139 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context); 140 141 if (!avrcp_connection){ 142 log_error("avrcp: there is no previously established AVRCP controller connection."); 143 return ERROR_CODE_COMMAND_DISALLOWED; 144 } 145 146 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 147 if (connection){ 148 log_error(" avrcp_browsing_connect connection exists."); 149 return ERROR_CODE_SUCCESS; 150 } 151 152 connection = avrcp_browsing_create_connection(avrcp_connection); 153 if (!connection){ 154 log_error("avrcp: could not allocate connection struct."); 155 return BTSTACK_MEMORY_ALLOC_FAILED; 156 } 157 158 if (browsing_cid){ 159 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 160 } 161 162 connection->ertm_buffer = ertm_buffer; 163 connection->ertm_buffer_size = size; 164 avrcp_connection->browsing_connection = connection; 165 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 166 memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 167 168 return l2cap_create_ertm_channel(avrcp_browsing_controller_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 169 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 170 171 } 172 173 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 174 UNUSED(channel); 175 UNUSED(size); 176 bd_addr_t event_addr; 177 uint16_t local_cid; 178 uint8_t status; 179 avrcp_browsing_connection_t * browsing_connection = NULL; 180 avrcp_connection_t * avrcp_connection = NULL; 181 182 if (packet_type != HCI_EVENT_PACKET) return; 183 184 switch (hci_event_packet_get_type(packet)) { 185 case HCI_EVENT_DISCONNECTION_COMPLETE: 186 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0); 187 break; 188 case L2CAP_EVENT_INCOMING_CONNECTION: 189 l2cap_event_incoming_connection_get_address(packet, event_addr); 190 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 191 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 192 if (!avrcp_connection) { 193 log_error("No previously created AVRCP controller connections"); 194 l2cap_decline_connection(local_cid); 195 break; 196 } 197 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 198 browsing_connection->l2cap_browsing_cid = local_cid; 199 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 200 log_info("Emit AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION browsing_cid 0x%02x, l2cap_signaling_cid 0x%02x\n", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 201 avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr); 202 break; 203 204 case L2CAP_EVENT_CHANNEL_OPENED: 205 l2cap_event_channel_opened_get_address(packet, event_addr); 206 status = l2cap_event_channel_opened_get_status(packet); 207 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 208 209 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 210 if (!avrcp_connection){ 211 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 212 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 213 l2cap_disconnect(local_cid, 0); // reason isn't used 214 break; 215 } 216 217 browsing_connection = avrcp_connection->browsing_connection; 218 if (status != ERROR_CODE_SUCCESS){ 219 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 220 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status); 221 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 222 avrcp_connection->browsing_connection = NULL; 223 break; 224 } 225 browsing_connection->l2cap_browsing_cid = local_cid; 226 227 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 228 browsing_connection->state = AVCTP_CONNECTION_OPENED; 229 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 230 break; 231 232 case L2CAP_EVENT_CHANNEL_CLOSED: 233 // data: event (8), len(8), channel (16) 234 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 235 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 236 237 if (avrcp_connection && avrcp_connection->browsing_connection){ 238 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 239 // free connection 240 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 241 avrcp_connection->browsing_connection = NULL; 242 break; 243 } 244 break; 245 default: 246 break; 247 } 248 } 249 250 static int avrcp_browsing_controller_send_get_folder_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 251 uint8_t command[100]; 252 int pos = 0; 253 254 // // if (connection->cmd_operands[3] == AVRCP_PDU_ID_GET_CAPABILITIES){ 255 // printf("cheet\n"); 256 // uint8_t buffer[] = {0xB0, 0x11, 0x0E, 0xFF, 0x00, 0x02, 0xFF, 0xFF}; 257 // memcpy(command, buffer, sizeof(buffer)); 258 // pos = sizeof(buffer); 259 // return l2cap_send(cid, command, pos); 260 // // } 261 262 // transport header 263 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 264 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 265 // Profile IDentifier (PID) 266 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 267 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 268 command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 269 printf_hexdump(command, pos); 270 printf("\n"); 271 272 uint32_t attribute_count = 0; 273 uint32_t attributes_to_copy = 0; 274 275 switch (connection->attr_bitmap){ 276 case AVRCP_MEDIA_ATTR_NONE: 277 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 278 break; 279 case AVRCP_MEDIA_ATTR_ALL: 280 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 281 break; 282 default: 283 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 284 attributes_to_copy = attribute_count; 285 break; 286 } 287 big_endian_store_16(command, pos, 9 + 1 + attribute_count*4); 288 pos += 2; 289 290 command[pos++] = connection->scope; 291 big_endian_store_32(command, pos, connection->start_item); 292 pos += 4; 293 big_endian_store_32(command, pos, connection->end_item); 294 pos += 4; 295 command[pos++] = attribute_count; 296 297 int bit_position = 1; 298 while (attributes_to_copy){ 299 if (connection->attr_bitmap & (1 << bit_position)){ 300 big_endian_store_32(command, pos, bit_position); 301 pos += 4; 302 attributes_to_copy--; 303 } 304 bit_position++; 305 } 306 return l2cap_send(cid, command, pos); 307 } 308 309 310 static int avrcp_browsing_controller_send_get_item_attributes_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 311 uint8_t command[100]; 312 int pos = 0; 313 // transport header 314 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 315 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 316 // Profile IDentifier (PID) 317 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 318 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 319 command[pos++] = AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES; 320 321 uint32_t attribute_count; 322 uint32_t attributes_to_copy = 0; 323 324 switch (connection->attr_bitmap){ 325 case AVRCP_MEDIA_ATTR_NONE: 326 case AVRCP_MEDIA_ATTR_ALL: 327 attribute_count = 0; 328 break; 329 default: 330 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 331 attributes_to_copy = attribute_count; 332 break; 333 } 334 335 big_endian_store_16(command, pos, 12 + attribute_count*4); 336 pos += 2; 337 338 command[pos++] = connection->scope; 339 memcpy(command+pos, connection->folder_uid, 8); 340 pos += 8; 341 big_endian_store_16(command, pos, connection->uid_counter); 342 pos += 2; 343 command[pos++] = attribute_count; 344 345 int bit_position = 1; 346 while (attributes_to_copy){ 347 if (connection->attr_bitmap & (1 << bit_position)){ 348 big_endian_store_32(command, pos, bit_position); 349 pos += 4; 350 attributes_to_copy--; 351 } 352 bit_position++; 353 } 354 355 return l2cap_send(cid, command, pos); 356 } 357 358 359 static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 360 uint8_t command[100]; 361 int pos = 0; 362 // transport header 363 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 364 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 365 // Profile IDentifier (PID) 366 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 367 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 368 command[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 369 370 big_endian_store_16(command, pos, 11); 371 pos += 2; 372 pos += 2; 373 command[pos++] = connection->direction; 374 memcpy(command+pos, connection->folder_uid, 8); 375 pos += 8; 376 return l2cap_send(cid, command, pos); 377 } 378 379 static int avrcp_browsing_controller_send_search_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 380 uint8_t command[100]; 381 int pos = 0; 382 // transport header 383 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 384 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 385 // Profile IDentifier (PID) 386 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 387 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 388 command[pos++] = AVRCP_PDU_ID_SEARCH; 389 390 big_endian_store_16(command, pos, 4 + connection->search_str_len); 391 pos += 2; 392 393 big_endian_store_16(command, pos, 0x006A); 394 pos += 2; 395 big_endian_store_16(command, pos, connection->search_str_len); 396 pos += 2; 397 398 memcpy(command+pos,connection->search_str, connection->search_str_len); 399 pos += connection->search_str_len; 400 return l2cap_send(cid, command, pos); 401 } 402 403 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 404 uint8_t command[100]; 405 int pos = 0; 406 // transport header 407 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 408 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 409 // Profile IDentifier (PID) 410 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 411 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 412 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 413 414 big_endian_store_16(command, pos, 2); 415 pos += 2; 416 big_endian_store_16(command, pos, connection->browsed_player_id); 417 pos += 2; 418 return l2cap_send(cid, command, pos); 419 } 420 421 static int avrcp_browsing_controller_send_get_total_nr_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 422 uint8_t command[7]; 423 int pos = 0; 424 // transport header 425 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 426 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 427 // Profile IDentifier (PID) 428 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 429 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 430 command[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 431 432 big_endian_store_16(command, pos, 1); 433 pos += 2; 434 command[pos++] = connection->get_total_nr_items_scope; 435 return l2cap_send(cid, command, pos); 436 } 437 438 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 439 switch (connection->state){ 440 case AVCTP_CONNECTION_OPENED: 441 if (connection->set_browsed_player_id){ 442 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 443 connection->set_browsed_player_id = 0; 444 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 445 break; 446 } 447 448 if (connection->get_total_nr_items){ 449 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 450 connection->get_total_nr_items = 0; 451 avrcp_browsing_controller_send_get_total_nr_items_cmd(connection->l2cap_browsing_cid, connection); 452 break; 453 } 454 455 if (connection->get_folder_items){ 456 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 457 connection->get_folder_items = 0; 458 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 459 break; 460 } 461 462 if (connection->get_item_attributes){ 463 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 464 connection->get_item_attributes = 0; 465 avrcp_browsing_controller_send_get_item_attributes_cmd(connection->l2cap_browsing_cid, connection); 466 break; 467 } 468 469 if (connection->change_path){ 470 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 471 connection->change_path = 0; 472 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 473 break; 474 } 475 476 if (connection->search){ 477 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 478 connection->search = 0; 479 avrcp_browsing_controller_send_search_cmd(connection->l2cap_browsing_cid, connection); 480 break; 481 } 482 break; 483 default: 484 return; 485 } 486 } 487 488 489 static void avrcp_browsing_controller_emit_done_with_uid_counter(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t uid_counter, uint8_t browsing_status, uint8_t bluetooth_status){ 490 if (!callback) return; 491 uint8_t event[9]; 492 int pos = 0; 493 event[pos++] = HCI_EVENT_AVRCP_META; 494 event[pos++] = sizeof(event) - 2; 495 event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE; 496 little_endian_store_16(event, pos, browsing_cid); 497 pos += 2; 498 little_endian_store_16(event, pos, uid_counter); 499 pos += 2; 500 event[pos++] = browsing_status; 501 event[pos++] = bluetooth_status; 502 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 503 } 504 505 static void avrcp_parser_reset(avrcp_browsing_connection_t * connection){ 506 connection->parser_attribute_header_pos = 0; 507 connection->parsed_attribute_value_offset = 0; 508 connection->parsed_num_attributes = 0; 509 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 510 } 511 512 513 static void avrcp_browsing_parser_process_byte(uint8_t byte, avrcp_browsing_connection_t * connection){ 514 uint8_t prepended_header_size = 1; 515 switch(connection->parser_state){ 516 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER:{ 517 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 518 if (connection->parser_attribute_header_pos < AVRCP_BROWSING_ITEM_HEADER_LEN) break; 519 520 uint16_t attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 1); 521 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = connection->parser_attribute_header[0]; // prepend with item type 522 connection->parsed_attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE - prepended_header_size); // reduce AVRCP_MAX_ATTRIBUTTE_SIZE for the size ot item type 523 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 524 // printf("AVRCP_PARSER_GET_ATTRIBUTE_HEADER value len %d, to parse %d, offset %d\n", attribute_total_value_len, connection->parsed_attribute_value_len, connection->parsed_attribute_value_offset); 525 break; 526 } 527 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE:{ 528 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = byte; 529 if (connection->parsed_attribute_value_offset < connection->parsed_attribute_value_len + prepended_header_size){ 530 break; 531 } 532 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1)){ 533 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 534 break; 535 } 536 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 537 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 538 connection->parsed_num_attributes++; 539 connection->parsed_attribute_value_offset = 0; 540 connection->parser_attribute_header_pos = 0; 541 542 if (connection->parsed_num_attributes == connection->num_items){ 543 avrcp_parser_reset(connection); 544 break; 545 } 546 break; 547 } 548 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 549 connection->parsed_attribute_value_offset++; 550 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1) + prepended_header_size){ 551 break; 552 } 553 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 554 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 555 connection->parsed_num_attributes++; 556 connection->parsed_attribute_value_offset = 0; 557 connection->parser_attribute_header_pos = 0; 558 559 if (connection->parsed_num_attributes == connection->num_items){ 560 avrcp_parser_reset(connection); 561 break; 562 } 563 break; 564 default: 565 break; 566 } 567 } 568 569 static void avrcp_browsing_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_browsing_connection_t * connection){ 570 int i; 571 for (i=0;i<num_bytes_to_read;i++){ 572 avrcp_browsing_parser_process_byte(packet[i], connection); 573 } 574 } 575 576 static void avrcp_browsing_controller_emit_failed(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 577 avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status); 578 } 579 580 581 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 582 avrcp_browsing_connection_t * browsing_connection; 583 584 switch (packet_type) { 585 case L2CAP_DATA_PACKET:{ 586 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 587 if (!browsing_connection) break; 588 // printf("received \n"); 589 // printf_hexdump(packet,size); 590 int pos = 0; 591 uint8_t transport_header = packet[pos++]; 592 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 593 browsing_connection->transaction_label = transport_header >> 4; 594 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 595 // printf("L2CAP_DATA_PACKET, packet type %d\n", avctp_packet_type); 596 switch (avctp_packet_type){ 597 case AVRCP_SINGLE_PACKET: 598 case AVRCP_START_PACKET: 599 // uint8_t frame_type = (transport_header & 0x03) >> 1; 600 // uint8_t ipid = transport_header & 0x01; 601 pos += 2; 602 browsing_connection->num_packets = 1; 603 if (avctp_packet_type == AVRCP_START_PACKET){ 604 browsing_connection->num_packets = packet[pos++]; 605 } 606 if (pos + 4 > size){ 607 browsing_connection->state = AVCTP_CONNECTION_OPENED; 608 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 609 return; 610 } 611 browsing_connection->pdu_id = packet[pos++]; 612 // uint16_t length = big_endian_read_16(packet, pos); 613 pos += 2; 614 browsing_connection->browsing_status = packet[pos++]; 615 if (browsing_connection->browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 616 browsing_connection->state = AVCTP_CONNECTION_OPENED; 617 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 618 return; 619 } 620 break; 621 default: 622 break; 623 } 624 625 uint32_t i; 626 switch(browsing_connection->pdu_id){ 627 case AVRCP_PDU_ID_CHANGE_PATH: 628 // printf("AVRCP_PDU_ID_CHANGE_PATH \n"); 629 break; 630 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 631 // printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n"); 632 break; 633 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 634 // uint32_t num_items = big_endian_read_32(packet, pos); 635 // pos += 4; 636 // printf("TODO: send event, uid_counter %d, num_items %d\n", browsing_connection->uid_counter, num_items); 637 break; 638 } 639 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 640 // printf("AVRCP_PDU_ID_SET_BROWSED_PLAYER \n"); 641 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 642 pos += 2; 643 // uint32_t num_items = big_endian_read_32(packet, pos); 644 pos += 4; 645 // uint16_t charset = big_endian_read_16(packet, pos); 646 pos += 2; 647 uint8_t folder_depth = packet[pos++]; 648 649 for (i = 0; i < folder_depth; i++){ 650 uint16_t folder_name_length = big_endian_read_16(packet, pos); 651 pos += 2; 652 // reuse packet and add data type as a header 653 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 654 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1); 655 pos += folder_name_length; 656 } 657 break; 658 } 659 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 660 // printf("AVRCP_PDU_ID_GET_FOLDER_ITEMS \n"); 661 switch (avctp_packet_type){ 662 case AVRCP_SINGLE_PACKET: 663 case AVRCP_START_PACKET: 664 avrcp_parser_reset(browsing_connection); 665 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 666 pos += 2; 667 browsing_connection->num_items = big_endian_read_16(packet, pos); //num_items 668 pos += 2; 669 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 670 break; 671 672 case AVRCP_CONTINUE_PACKET: 673 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 674 break; 675 676 case AVRCP_END_PACKET: 677 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 678 avrcp_parser_reset(browsing_connection); 679 break; 680 } 681 break; 682 } 683 case AVRCP_PDU_ID_SEARCH:{ 684 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 685 pos += 2; 686 // uint32_t num_items = big_endian_read_32(packet, pos); 687 // printf("TODO: send as event, search found %d items\n", num_items); 688 break; 689 } 690 case AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES: 691 packet[pos-1] = AVRCP_BROWSING_MEDIA_ELEMENT_ITEM_ATTRIBUTE; 692 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, size - pos + 1); 693 break; 694 default: 695 log_info(" not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 696 break; 697 } 698 699 switch (avctp_packet_type){ 700 case AVRCP_SINGLE_PACKET: 701 case AVRCP_END_PACKET: 702 // printf("reset browsing connection state to OPENED\n"); 703 browsing_connection->state = AVCTP_CONNECTION_OPENED; 704 avrcp_browsing_controller_emit_done_with_uid_counter(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->uid_counter, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 705 break; 706 default: 707 break; 708 } 709 // printf(" paket done\n"); 710 break; 711 } 712 case HCI_EVENT_PACKET: 713 switch (hci_event_packet_get_type(packet)){ 714 case L2CAP_EVENT_CAN_SEND_NOW: 715 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 716 if (!browsing_connection) break; 717 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 718 break; 719 default: 720 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 721 break; 722 } 723 break; 724 725 default: 726 break; 727 } 728 } 729 730 void avrcp_browsing_controller_init(void){ 731 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 732 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 733 } 734 735 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 736 if (callback == NULL){ 737 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 738 return; 739 } 740 avrcp_controller_context.browsing_avrcp_callback = callback; 741 } 742 743 uint8_t avrcp_browsing_controller_connect(bd_addr_t bd_addr, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){ 744 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 745 } 746 747 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 748 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 749 if (!avrcp_connection){ 750 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 751 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 752 } 753 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 754 755 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 756 return ERROR_CODE_SUCCESS; 757 } 758 759 uint8_t avrcp_browsing_controller_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config){ 760 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 761 if (!avrcp_connection){ 762 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 763 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 764 } 765 if (!avrcp_connection->browsing_connection){ 766 log_error("avrcp_browsing_controller_decline_incoming_connection: no browsing connection."); 767 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 768 } 769 770 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 771 log_error("avrcp_browsing_controller_decline_incoming_connection: browsing connection in a wrong state."); 772 return ERROR_CODE_COMMAND_DISALLOWED; 773 } 774 775 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 776 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 777 avrcp_connection->browsing_connection->ertm_buffer_size = size; 778 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 779 l2cap_accept_ertm_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid, &avrcp_connection->browsing_connection->ertm_config, avrcp_connection->browsing_connection->ertm_buffer, avrcp_connection->browsing_connection->ertm_buffer_size); 780 return ERROR_CODE_SUCCESS; 781 } 782 783 uint8_t avrcp_browsing_controller_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 784 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 785 if (!avrcp_connection){ 786 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 787 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 788 } 789 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 790 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 791 792 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 793 // free connection 794 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 795 avrcp_connection->browsing_connection = NULL; 796 return ERROR_CODE_SUCCESS; 797 } 798 799 uint8_t avrcp_browsing_controller_get_item_attributes_for_scope(uint16_t avrcp_browsing_cid, uint8_t * uid, uint16_t uid_counter, uint32_t attr_bitmap, avrcp_browsing_scope_t scope){ 800 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 801 if (!avrcp_connection){ 802 log_error("avrcp_browsing_controller_get_item_attributes: could not find a connection."); 803 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 804 } 805 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 806 if (connection->state != AVCTP_CONNECTION_OPENED){ 807 log_error("avrcp_browsing_controller_get_item_attributes: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 808 return ERROR_CODE_COMMAND_DISALLOWED; 809 } 810 811 connection->get_item_attributes = 1; 812 connection->scope = scope; 813 memcpy(connection->folder_uid, uid, 8); 814 connection->uid_counter = uid_counter; 815 connection->attr_bitmap = attr_bitmap; 816 817 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 818 return ERROR_CODE_SUCCESS; 819 } 820 821 /** 822 * @brief Retrieve a listing of the contents of a folder. 823 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 824 * @param start_item 825 * @param end_item 826 * @param attribute_count 827 * @param attribute_list 828 **/ 829 static uint8_t avrcp_browsing_controller_get_folder_items(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 830 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 831 if (!avrcp_connection){ 832 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 833 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 834 } 835 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 836 if (connection->state != AVCTP_CONNECTION_OPENED) { 837 log_error("avrcp_browsing_controller_get_folder_items: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 838 return ERROR_CODE_COMMAND_DISALLOWED; 839 } 840 841 connection->get_folder_items = 1; 842 connection->scope = scope; 843 connection->start_item = start_item; 844 connection->end_item = end_item; 845 connection->attr_bitmap = attr_bitmap; 846 847 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 848 return ERROR_CODE_SUCCESS; 849 } 850 851 uint8_t avrcp_browsing_controller_get_media_players(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 852 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap); 853 } 854 855 uint8_t avrcp_browsing_controller_browse_file_system(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 856 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 857 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap); 858 } 859 860 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 861 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 862 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap); 863 } 864 865 uint8_t avrcp_browsing_controller_browse_now_playing_list(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 866 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap); 867 } 868 869 870 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 871 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 872 if (!avrcp_connection){ 873 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 874 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 875 } 876 877 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 878 if (connection->state != AVCTP_CONNECTION_OPENED){ 879 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 880 return ERROR_CODE_COMMAND_DISALLOWED; 881 } 882 883 connection->set_browsed_player_id = 1; 884 connection->browsed_player_id = browsed_player_id; 885 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 886 return ERROR_CODE_SUCCESS; 887 } 888 889 /** 890 * @brief Retrieve a listing of the contents of a folder. 891 * @param direction 0-folder up, 1-folder down 892 * @param folder_uid 8 bytes long 893 **/ 894 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 895 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 896 if (!avrcp_connection){ 897 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 898 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 899 } 900 901 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 902 903 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 904 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 905 return ERROR_CODE_COMMAND_DISALLOWED; 906 } 907 908 if (!connection->browsed_player_id){ 909 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 910 return ERROR_CODE_COMMAND_DISALLOWED; 911 } 912 connection->change_path = 1; 913 connection->direction = direction; 914 memset(connection->folder_uid, 0, 8); 915 if (folder_uid){ 916 memcpy(connection->folder_uid, folder_uid, 8); 917 } 918 919 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 920 return ERROR_CODE_SUCCESS; 921 } 922 923 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 924 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL); 925 } 926 927 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 928 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 929 } 930 931 uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str){ 932 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 933 if (!avrcp_connection){ 934 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 935 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 936 } 937 938 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 939 940 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 941 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 942 return ERROR_CODE_COMMAND_DISALLOWED; 943 } 944 945 if (!connection->browsed_player_id){ 946 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 947 return ERROR_CODE_COMMAND_DISALLOWED; 948 } 949 if (!search_str || search_str_len == 0){ 950 return AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND; 951 } 952 953 connection->search = 1; 954 955 connection->search_str_len = btstack_min(search_str_len, sizeof(connection->search_str)-1); 956 memset(connection->search_str, 0, sizeof(connection->search_str)); 957 memcpy(connection->search_str, search_str, connection->search_str_len); 958 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 959 return ERROR_CODE_SUCCESS; 960 } 961 962 uint8_t avrcp_browsing_controller_get_total_nr_items_for_scope(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope){ 963 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 964 if (!avrcp_connection){ 965 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 966 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 967 } 968 969 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 970 971 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 972 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 973 return ERROR_CODE_COMMAND_DISALLOWED; 974 } 975 976 if (!connection->browsed_player_id){ 977 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 978 return ERROR_CODE_COMMAND_DISALLOWED; 979 } 980 connection->get_total_nr_items = 1; 981 connection->get_total_nr_items_scope = scope; 982 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 983 return ERROR_CODE_SUCCESS; 984 } 985