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