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