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) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 159 160 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 161 connection->ertm_buffer = ertm_buffer; 162 connection->ertm_buffer_size = size; 163 avrcp_connection->browsing_connection = connection; 164 165 memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 166 167 return l2cap_create_ertm_channel(avrcp_browsing_controller_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 168 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 169 170 } 171 172 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 173 UNUSED(channel); 174 UNUSED(size); 175 bd_addr_t event_addr; 176 uint16_t local_cid; 177 uint8_t status; 178 avrcp_browsing_connection_t * browsing_connection = NULL; 179 avrcp_connection_t * avrcp_connection = NULL; 180 181 if (packet_type != HCI_EVENT_PACKET) return; 182 183 switch (hci_event_packet_get_type(packet)) { 184 case HCI_EVENT_DISCONNECTION_COMPLETE: 185 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0); 186 break; 187 case L2CAP_EVENT_INCOMING_CONNECTION: 188 l2cap_event_incoming_connection_get_address(packet, event_addr); 189 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 190 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 191 if (!avrcp_connection) { 192 log_error("No previously created AVRCP controller connections"); 193 l2cap_decline_connection(local_cid); 194 break; 195 } 196 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 197 browsing_connection->l2cap_browsing_cid = local_cid; 198 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 199 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); 200 avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr); 201 break; 202 203 case L2CAP_EVENT_CHANNEL_OPENED: 204 l2cap_event_channel_opened_get_address(packet, event_addr); 205 status = l2cap_event_channel_opened_get_status(packet); 206 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 207 208 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 209 if (!avrcp_connection){ 210 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 211 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 212 l2cap_disconnect(local_cid, 0); // reason isn't used 213 break; 214 } 215 216 browsing_connection = avrcp_connection->browsing_connection; 217 if (status != ERROR_CODE_SUCCESS){ 218 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 219 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status); 220 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 221 avrcp_connection->browsing_connection = NULL; 222 break; 223 } 224 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 225 226 browsing_connection->l2cap_browsing_cid = local_cid; 227 228 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 229 browsing_connection->state = AVCTP_CONNECTION_OPENED; 230 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 231 break; 232 233 case L2CAP_EVENT_CHANNEL_CLOSED: 234 // data: event (8), len(8), channel (16) 235 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 236 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 237 238 if (avrcp_connection && avrcp_connection->browsing_connection){ 239 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 240 // free connection 241 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 242 avrcp_connection->browsing_connection = NULL; 243 break; 244 } 245 break; 246 default: 247 break; 248 } 249 } 250 251 static int avrcp_browsing_controller_send_get_folder_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 252 uint8_t command[100]; 253 int pos = 0; 254 255 // // if (connection->cmd_operands[3] == AVRCP_PDU_ID_GET_CAPABILITIES){ 256 // printf("cheet\n"); 257 // uint8_t buffer[] = {0xB0, 0x11, 0x0E, 0xFF, 0x00, 0x02, 0xFF, 0xFF}; 258 // memcpy(command, buffer, sizeof(buffer)); 259 // pos = sizeof(buffer); 260 // return l2cap_send(cid, command, pos); 261 // // } 262 263 // transport header 264 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 265 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 266 // Profile IDentifier (PID) 267 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 268 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 269 command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 270 271 uint32_t attribute_count = 0; 272 uint32_t attributes_to_copy = 0; 273 274 switch (connection->attr_bitmap){ 275 case AVRCP_MEDIA_ATTR_NONE: 276 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 277 break; 278 case AVRCP_MEDIA_ATTR_ALL: 279 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 280 break; 281 default: 282 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 283 attributes_to_copy = attribute_count; 284 break; 285 } 286 287 big_endian_store_16(command, pos, 9 + attribute_count*4); 288 pos += 2; 289 command[pos++] = connection->scope; 290 big_endian_store_32(command, pos, connection->start_item); 291 pos += 4; 292 big_endian_store_32(command, pos, connection->end_item); 293 pos += 4; 294 command[pos++] = attribute_count; 295 296 int bit_position = 1; 297 while (attributes_to_copy){ 298 if (connection->attr_bitmap & (1 << bit_position)){ 299 big_endian_store_32(command, pos, bit_position); 300 pos += 4; 301 attributes_to_copy--; 302 } 303 bit_position++; 304 } 305 306 307 return l2cap_send(cid, command, pos); 308 } 309 310 311 static int avrcp_browsing_controller_send_get_item_attributes_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 312 uint8_t command[100]; 313 int pos = 0; 314 // transport header 315 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 316 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 317 // Profile IDentifier (PID) 318 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 319 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 320 command[pos++] = AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES; 321 322 uint32_t attribute_count = 0; 323 uint32_t attributes_to_copy = 0; 324 325 switch (connection->attr_bitmap){ 326 case AVRCP_MEDIA_ATTR_NONE: 327 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 328 break; 329 case AVRCP_MEDIA_ATTR_ALL: 330 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 331 break; 332 default: 333 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 334 attributes_to_copy = attribute_count; 335 break; 336 } 337 338 big_endian_store_16(command, pos, 12 + attribute_count*4); 339 pos += 2; 340 341 command[pos++] = connection->scope; 342 memcpy(command+pos, connection->folder_uid, 8); 343 pos += 8; 344 big_endian_store_16(command, pos, connection->uid_counter); 345 pos += 2; 346 command[pos++] = attribute_count; 347 348 int bit_position = 1; 349 while (attributes_to_copy){ 350 if (connection->attr_bitmap & (1 << bit_position)){ 351 big_endian_store_32(command, pos, bit_position); 352 pos += 4; 353 attributes_to_copy--; 354 } 355 bit_position++; 356 } 357 358 return l2cap_send(cid, command, pos); 359 } 360 361 362 static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 363 uint8_t command[100]; 364 int pos = 0; 365 // transport header 366 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 367 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 368 // Profile IDentifier (PID) 369 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 370 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 371 command[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 372 373 big_endian_store_16(command, pos, 11); 374 pos += 2; 375 pos += 2; 376 command[pos++] = connection->direction; 377 memcpy(command+pos, connection->folder_uid, 8); 378 pos += 8; 379 return l2cap_send(cid, command, pos); 380 } 381 382 static int avrcp_browsing_controller_send_search_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 383 uint8_t command[100]; 384 int pos = 0; 385 // transport header 386 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 387 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 388 // Profile IDentifier (PID) 389 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 390 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 391 command[pos++] = AVRCP_PDU_ID_SEARCH; 392 393 big_endian_store_16(command, pos, 4 + connection->search_str_len); 394 pos += 2; 395 396 big_endian_store_16(command, pos, 0x006A); 397 pos += 2; 398 big_endian_store_16(command, pos, connection->search_str_len); 399 pos += 2; 400 401 memcpy(command+pos,connection->search_str, connection->search_str_len); 402 pos += connection->search_str_len; 403 return l2cap_send(cid, command, pos); 404 } 405 406 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 407 uint8_t command[100]; 408 int pos = 0; 409 // transport header 410 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 411 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 412 // Profile IDentifier (PID) 413 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 414 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 415 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 416 417 big_endian_store_16(command, pos, 2); 418 pos += 2; 419 big_endian_store_16(command, pos, connection->browsed_player_id); 420 pos += 2; 421 return l2cap_send(cid, command, pos); 422 } 423 424 static int avrcp_browsing_controller_send_get_total_nr_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 425 uint8_t command[7]; 426 int pos = 0; 427 // transport header 428 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 429 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 430 // Profile IDentifier (PID) 431 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 432 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 433 command[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 434 435 big_endian_store_16(command, pos, 1); 436 pos += 2; 437 command[pos++] = connection->get_total_nr_items_scope; 438 return l2cap_send(cid, command, pos); 439 } 440 441 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 442 switch (connection->state){ 443 case AVCTP_CONNECTION_OPENED: 444 if (connection->set_browsed_player_id){ 445 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 446 connection->set_browsed_player_id = 0; 447 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 448 break; 449 } 450 451 if (connection->get_total_nr_items){ 452 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 453 connection->get_total_nr_items = 0; 454 avrcp_browsing_controller_send_get_total_nr_items_cmd(connection->l2cap_browsing_cid, connection); 455 break; 456 } 457 458 if (connection->get_folder_items){ 459 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 460 connection->get_folder_items = 0; 461 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 462 break; 463 } 464 465 if (connection->get_item_attributes){ 466 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 467 connection->get_item_attributes = 0; 468 avrcp_browsing_controller_send_get_item_attributes_cmd(connection->l2cap_browsing_cid, connection); 469 break; 470 } 471 472 if (connection->change_path){ 473 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 474 connection->change_path = 0; 475 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 476 break; 477 } 478 479 if (connection->search){ 480 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 481 connection->search = 0; 482 avrcp_browsing_controller_send_search_cmd(connection->l2cap_browsing_cid, connection); 483 break; 484 } 485 break; 486 default: 487 return; 488 } 489 } 490 491 492 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){ 493 if (!callback) return; 494 uint8_t event[9]; 495 int pos = 0; 496 event[pos++] = HCI_EVENT_AVRCP_META; 497 event[pos++] = sizeof(event) - 2; 498 event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE; 499 little_endian_store_16(event, pos, browsing_cid); 500 pos += 2; 501 little_endian_store_16(event, pos, uid_counter); 502 pos += 2; 503 event[pos++] = browsing_status; 504 event[pos++] = bluetooth_status; 505 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 506 } 507 508 static void avrcp_parser_reset(avrcp_browsing_connection_t * connection){ 509 connection->parser_attribute_header_pos = 0; 510 connection->parsed_attribute_value_offset = 0; 511 connection->parsed_num_attributes = 0; 512 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 513 } 514 515 516 static void avrcp_browsing_parser_process_byte(uint8_t byte, avrcp_browsing_connection_t * connection){ 517 uint8_t prepended_header_size = 1; 518 switch(connection->parser_state){ 519 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER:{ 520 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 521 if (connection->parser_attribute_header_pos < AVRCP_BROWSING_ITEM_HEADER_LEN) break; 522 523 uint16_t attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 1); 524 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = connection->parser_attribute_header[0]; // prepend with item type 525 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 526 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 527 // 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); 528 break; 529 } 530 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE:{ 531 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = byte; 532 if (connection->parsed_attribute_value_offset < connection->parsed_attribute_value_len + prepended_header_size){ 533 break; 534 } 535 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1)){ 536 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 537 break; 538 } 539 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 540 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 541 connection->parsed_num_attributes++; 542 connection->parsed_attribute_value_offset = 0; 543 connection->parser_attribute_header_pos = 0; 544 545 if (connection->parsed_num_attributes == connection->num_items){ 546 avrcp_parser_reset(connection); 547 break; 548 } 549 break; 550 } 551 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 552 connection->parsed_attribute_value_offset++; 553 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1) + prepended_header_size){ 554 break; 555 } 556 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 557 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 558 connection->parsed_num_attributes++; 559 connection->parsed_attribute_value_offset = 0; 560 connection->parser_attribute_header_pos = 0; 561 562 if (connection->parsed_num_attributes == connection->num_items){ 563 avrcp_parser_reset(connection); 564 break; 565 } 566 break; 567 default: 568 break; 569 } 570 } 571 572 static void avrcp_browsing_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_browsing_connection_t * connection){ 573 int i; 574 for (i=0;i<num_bytes_to_read;i++){ 575 avrcp_browsing_parser_process_byte(packet[i], connection); 576 } 577 } 578 579 static void avrcp_browsing_controller_emit_failed(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 580 avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status); 581 } 582 583 584 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 585 avrcp_browsing_connection_t * browsing_connection; 586 587 switch (packet_type) { 588 case L2CAP_DATA_PACKET:{ 589 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 590 if (!browsing_connection) break; 591 // printf("received \n"); 592 // printf_hexdump(packet,size); 593 int pos = 0; 594 uint8_t transport_header = packet[pos++]; 595 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 596 browsing_connection->transaction_label = transport_header >> 4; 597 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 598 // printf("L2CAP_DATA_PACKET, packet type %d\n", avctp_packet_type); 599 switch (avctp_packet_type){ 600 case AVRCP_SINGLE_PACKET: 601 case AVRCP_START_PACKET: 602 // uint8_t frame_type = (transport_header & 0x03) >> 1; 603 // uint8_t ipid = transport_header & 0x01; 604 pos += 2; 605 browsing_connection->num_packets = 1; 606 if (avctp_packet_type == AVRCP_START_PACKET){ 607 browsing_connection->num_packets = packet[pos++]; 608 } 609 if (pos + 4 > size){ 610 browsing_connection->state = AVCTP_CONNECTION_OPENED; 611 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 612 return; 613 } 614 browsing_connection->pdu_id = packet[pos++]; 615 // uint16_t length = big_endian_read_16(packet, pos); 616 pos += 2; 617 browsing_connection->browsing_status = packet[pos++]; 618 if (browsing_connection->browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 619 browsing_connection->state = AVCTP_CONNECTION_OPENED; 620 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 621 return; 622 } 623 break; 624 default: 625 break; 626 } 627 628 uint32_t i; 629 switch(browsing_connection->pdu_id){ 630 case AVRCP_PDU_ID_CHANGE_PATH: 631 // printf("AVRCP_PDU_ID_CHANGE_PATH \n"); 632 break; 633 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 634 // printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n"); 635 break; 636 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 637 // uint32_t num_items = big_endian_read_32(packet, pos); 638 // pos += 4; 639 // printf("TODO: send event, uid_counter %d, num_items %d\n", browsing_connection->uid_counter, num_items); 640 break; 641 } 642 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 643 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 644 pos += 2; 645 // uint32_t num_items = big_endian_read_32(packet, pos); 646 pos += 4; 647 // uint16_t charset = big_endian_read_16(packet, pos); 648 pos += 2; 649 uint8_t folder_depth = packet[pos++]; 650 651 for (i = 0; i < folder_depth; i++){ 652 uint16_t folder_name_length = big_endian_read_16(packet, pos); 653 pos += 2; 654 // reuse packet and add data type as a header 655 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 656 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1); 657 pos += folder_name_length; 658 } 659 break; 660 } 661 662 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 663 switch (avctp_packet_type){ 664 case AVRCP_SINGLE_PACKET: 665 case AVRCP_START_PACKET: 666 avrcp_parser_reset(browsing_connection); 667 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 668 pos += 2; 669 browsing_connection->num_items = big_endian_read_16(packet, pos); //num_items 670 pos += 2; 671 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 672 break; 673 674 case AVRCP_CONTINUE_PACKET: 675 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 676 break; 677 678 case AVRCP_END_PACKET: 679 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 680 avrcp_parser_reset(browsing_connection); 681 break; 682 } 683 break; 684 } 685 686 case AVRCP_PDU_ID_SEARCH:{ 687 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 688 pos += 2; 689 // uint32_t num_items = big_endian_read_32(packet, pos); 690 // printf("TODO: send as event, search found %d items\n", num_items); 691 break; 692 } 693 case AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES: 694 packet[pos-1] = AVRCP_BROWSING_MEDIA_ELEMENT_ITEM_ATTRIBUTE; 695 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, size - pos + 1); 696 break; 697 698 default: 699 log_info(" not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 700 break; 701 } 702 703 switch (avctp_packet_type){ 704 case AVRCP_SINGLE_PACKET: 705 case AVRCP_END_PACKET: 706 // printf("reset browsing connection state to OPENED\n"); 707 browsing_connection->state = AVCTP_CONNECTION_OPENED; 708 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); 709 break; 710 default: 711 break; 712 } 713 // printf(" paket done\n"); 714 break; 715 } 716 case HCI_EVENT_PACKET: 717 switch (hci_event_packet_get_type(packet)){ 718 case L2CAP_EVENT_CAN_SEND_NOW: 719 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 720 if (!browsing_connection) break; 721 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 722 break; 723 default: 724 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 725 break; 726 } 727 break; 728 729 default: 730 break; 731 } 732 } 733 734 void avrcp_browsing_controller_init(void){ 735 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 736 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 737 } 738 739 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 740 if (callback == NULL){ 741 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 742 return; 743 } 744 avrcp_controller_context.browsing_avrcp_callback = callback; 745 } 746 747 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){ 748 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 749 } 750 751 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 752 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 753 if (!avrcp_connection){ 754 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 755 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 756 } 757 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 758 759 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 760 return ERROR_CODE_SUCCESS; 761 } 762 763 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){ 764 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 765 if (!avrcp_connection){ 766 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 767 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 768 } 769 if (!avrcp_connection->browsing_connection){ 770 log_error("avrcp_browsing_controller_decline_incoming_connection: no browsing connection."); 771 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 772 } 773 774 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 775 log_error("avrcp_browsing_controller_decline_incoming_connection: browsing connection in a wrong state."); 776 return ERROR_CODE_COMMAND_DISALLOWED; 777 } 778 779 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 780 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 781 avrcp_connection->browsing_connection->ertm_buffer_size = size; 782 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 783 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); 784 return ERROR_CODE_SUCCESS; 785 } 786 787 uint8_t avrcp_browsing_controller_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 788 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 789 if (!avrcp_connection){ 790 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 791 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 792 } 793 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 794 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 795 796 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 797 // free connection 798 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 799 avrcp_connection->browsing_connection = NULL; 800 return ERROR_CODE_SUCCESS; 801 } 802 803 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){ 804 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 805 if (!avrcp_connection){ 806 log_error("avrcp_browsing_controller_get_item_attributes: could not find a connection."); 807 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 808 } 809 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 810 if (connection->state != AVCTP_CONNECTION_OPENED){ 811 log_error("avrcp_browsing_controller_get_item_attributes: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 812 return ERROR_CODE_COMMAND_DISALLOWED; 813 } 814 815 connection->get_item_attributes = 1; 816 connection->scope = scope; 817 memcpy(connection->folder_uid, uid, 8); 818 connection->uid_counter = uid_counter; 819 connection->attr_bitmap = attr_bitmap; 820 821 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 822 return ERROR_CODE_SUCCESS; 823 } 824 825 /** 826 * @brief Retrieve a listing of the contents of a folder. 827 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 828 * @param start_item 829 * @param end_item 830 * @param attribute_count 831 * @param attribute_list 832 **/ 833 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){ 834 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 835 if (!avrcp_connection){ 836 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 837 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 838 } 839 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 840 if (connection->state != AVCTP_CONNECTION_OPENED) { 841 log_error("avrcp_browsing_controller_get_folder_items: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 842 return ERROR_CODE_COMMAND_DISALLOWED; 843 } 844 845 connection->get_folder_items = 1; 846 connection->scope = scope; 847 connection->start_item = start_item; 848 connection->end_item = end_item; 849 connection->attr_bitmap = attr_bitmap; 850 851 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 852 return ERROR_CODE_SUCCESS; 853 } 854 855 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){ 856 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap); 857 } 858 859 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){ 860 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 861 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap); 862 } 863 864 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 865 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 866 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap); 867 } 868 869 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){ 870 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap); 871 } 872 873 874 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 875 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 876 if (!avrcp_connection){ 877 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 878 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 879 } 880 881 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 882 if (connection->state != AVCTP_CONNECTION_OPENED){ 883 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 884 return ERROR_CODE_COMMAND_DISALLOWED; 885 } 886 887 connection->set_browsed_player_id = 1; 888 connection->browsed_player_id = browsed_player_id; 889 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 890 return ERROR_CODE_SUCCESS; 891 } 892 893 /** 894 * @brief Retrieve a listing of the contents of a folder. 895 * @param direction 0-folder up, 1-folder down 896 * @param folder_uid 8 bytes long 897 **/ 898 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 899 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 900 if (!avrcp_connection){ 901 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 902 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 903 } 904 905 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 906 907 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 908 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 909 return ERROR_CODE_COMMAND_DISALLOWED; 910 } 911 912 if (!connection->browsed_player_id){ 913 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 914 return ERROR_CODE_COMMAND_DISALLOWED; 915 } 916 connection->change_path = 1; 917 connection->direction = direction; 918 memset(connection->folder_uid, 0, 8); 919 if (folder_uid){ 920 memcpy(connection->folder_uid, folder_uid, 8); 921 } 922 923 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 924 return ERROR_CODE_SUCCESS; 925 } 926 927 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 928 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL); 929 } 930 931 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 932 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 933 } 934 935 uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str){ 936 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 937 if (!avrcp_connection){ 938 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 939 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 940 } 941 942 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 943 944 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 945 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 946 return ERROR_CODE_COMMAND_DISALLOWED; 947 } 948 949 if (!connection->browsed_player_id){ 950 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 951 return ERROR_CODE_COMMAND_DISALLOWED; 952 } 953 if (!search_str || search_str_len == 0){ 954 return AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND; 955 } 956 957 connection->search = 1; 958 959 connection->search_str_len = btstack_min(search_str_len, sizeof(connection->search_str)-1); 960 memset(connection->search_str, 0, sizeof(connection->search_str)); 961 memcpy(connection->search_str, search_str, connection->search_str_len); 962 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 963 return ERROR_CODE_SUCCESS; 964 } 965 966 uint8_t avrcp_browsing_controller_get_total_nr_items_for_scope(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope){ 967 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 968 if (!avrcp_connection){ 969 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 970 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 971 } 972 973 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 974 975 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 976 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 977 return ERROR_CODE_COMMAND_DISALLOWED; 978 } 979 980 if (!connection->browsed_player_id){ 981 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 982 return ERROR_CODE_COMMAND_DISALLOWED; 983 } 984 connection->get_total_nr_items = 1; 985 connection->get_total_nr_items_scope = scope; 986 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 987 return ERROR_CODE_SUCCESS; 988 } 989