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