1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "avrcp_browsing_controller.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_browsing_controller.h" 48 49 #define PSM_AVCTP_BROWSING 0x001b 50 51 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context); 52 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 53 54 static avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid, avrcp_context_t * context){ 55 btstack_linked_list_iterator_t it; 56 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 57 while (btstack_linked_list_iterator_has_next(&it)){ 58 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 59 if (connection->avrcp_browsing_cid != browsing_cid) continue; 60 return connection; 61 } 62 return NULL; 63 } 64 65 static avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid, avrcp_context_t * context){ 66 btstack_linked_list_iterator_t it; 67 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 68 while (btstack_linked_list_iterator_has_next(&it)){ 69 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 70 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 71 return connection; 72 } 73 return NULL; 74 } 75 76 static avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 77 btstack_linked_list_iterator_t it; 78 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 79 while (btstack_linked_list_iterator_has_next(&it)){ 80 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 81 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 82 return connection->browsing_connection; 83 } 84 return NULL; 85 } 86 87 static void avrcp_emit_browsing_connection_established(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 88 if (!callback) return; 89 uint8_t event[12]; 90 int pos = 0; 91 event[pos++] = HCI_EVENT_AVRCP_META; 92 event[pos++] = sizeof(event) - 2; 93 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 94 event[pos++] = status; 95 reverse_bd_addr(addr,&event[pos]); 96 pos += 6; 97 little_endian_store_16(event, pos, browsing_cid); 98 pos += 2; 99 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 100 } 101 102 static void avrcp_emit_incoming_browsing_connection(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr){ 103 if (!callback) return; 104 uint8_t event[11]; 105 int pos = 0; 106 event[pos++] = HCI_EVENT_AVRCP_META; 107 event[pos++] = sizeof(event) - 2; 108 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 109 reverse_bd_addr(addr,&event[pos]); 110 pos += 6; 111 little_endian_store_16(event, pos, browsing_cid); 112 pos += 2; 113 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 114 } 115 116 static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){ 117 if (!callback) return; 118 uint8_t event[5]; 119 int pos = 0; 120 event[pos++] = HCI_EVENT_AVRCP_META; 121 event[pos++] = sizeof(event) - 2; 122 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 123 little_endian_store_16(event, pos, browsing_cid); 124 pos += 2; 125 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 126 } 127 128 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 129 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 130 memset(connection, 0, sizeof(avrcp_browsing_connection_t)); 131 connection->state = AVCTP_CONNECTION_IDLE; 132 connection->transaction_label = 0xFF; 133 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(); 134 avrcp_connection->browsing_connection = connection; 135 return connection; 136 } 137 138 static uint8_t avrcp_browsing_connect(bd_addr_t remote_addr, avrcp_context_t * context, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * browsing_cid){ 139 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context); 140 141 if (!avrcp_connection){ 142 log_error("avrcp: there is no previously established AVRCP controller connection."); 143 return ERROR_CODE_COMMAND_DISALLOWED; 144 } 145 146 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 147 if (connection){ 148 log_error(" avrcp_browsing_connect connection exists."); 149 return ERROR_CODE_SUCCESS; 150 } 151 152 connection = avrcp_browsing_create_connection(avrcp_connection); 153 if (!connection){ 154 log_error("avrcp: could not allocate connection struct."); 155 return BTSTACK_MEMORY_ALLOC_FAILED; 156 } 157 158 if (!browsing_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 159 160 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 161 connection->ertm_buffer = ertm_buffer; 162 connection->ertm_buffer_size = size; 163 avrcp_connection->browsing_connection = connection; 164 165 memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 166 167 return l2cap_create_ertm_channel(avrcp_browsing_controller_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 168 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 169 170 } 171 172 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 173 UNUSED(channel); 174 UNUSED(size); 175 bd_addr_t event_addr; 176 uint16_t local_cid; 177 uint8_t status; 178 avrcp_browsing_connection_t * browsing_connection = NULL; 179 avrcp_connection_t * avrcp_connection = NULL; 180 181 if (packet_type != HCI_EVENT_PACKET) return; 182 183 switch (hci_event_packet_get_type(packet)) { 184 case HCI_EVENT_DISCONNECTION_COMPLETE: 185 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0); 186 break; 187 case L2CAP_EVENT_INCOMING_CONNECTION: 188 l2cap_event_incoming_connection_get_address(packet, event_addr); 189 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 190 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 191 if (!avrcp_connection) { 192 log_error("No previously created AVRCP controller connections"); 193 l2cap_decline_connection(local_cid); 194 break; 195 } 196 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 197 browsing_connection->l2cap_browsing_cid = local_cid; 198 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 199 log_info("Emit AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION browsing_cid 0x%02x, l2cap_signaling_cid 0x%02x\n", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 200 avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr); 201 break; 202 203 case L2CAP_EVENT_CHANNEL_OPENED: 204 l2cap_event_channel_opened_get_address(packet, event_addr); 205 status = l2cap_event_channel_opened_get_status(packet); 206 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 207 208 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 209 if (!avrcp_connection){ 210 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 211 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 212 l2cap_disconnect(local_cid, 0); // reason isn't used 213 break; 214 } 215 216 browsing_connection = avrcp_connection->browsing_connection; 217 if (status != ERROR_CODE_SUCCESS){ 218 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 219 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status); 220 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 221 avrcp_connection->browsing_connection = NULL; 222 break; 223 } 224 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 225 226 browsing_connection->l2cap_browsing_cid = local_cid; 227 228 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 229 browsing_connection->state = AVCTP_CONNECTION_OPENED; 230 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 231 break; 232 233 case L2CAP_EVENT_CHANNEL_CLOSED: 234 // data: event (8), len(8), channel (16) 235 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 236 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 237 238 if (avrcp_connection && avrcp_connection->browsing_connection){ 239 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 240 // free connection 241 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 242 avrcp_connection->browsing_connection = NULL; 243 break; 244 } 245 break; 246 default: 247 break; 248 } 249 } 250 251 static int avrcp_browsing_controller_send_get_folder_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 252 uint8_t command[100]; 253 int pos = 0; 254 // transport header 255 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 256 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 257 // Profile IDentifier (PID) 258 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 259 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 260 command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 261 262 uint32_t attribute_count = 0; 263 uint32_t attributes_to_copy = 0; 264 265 switch (connection->attr_bitmap){ 266 case AVRCP_MEDIA_ATTR_NONE: 267 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 268 break; 269 case AVRCP_MEDIA_ATTR_ALL: 270 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 271 break; 272 default: 273 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 274 attributes_to_copy = attribute_count; 275 break; 276 } 277 278 big_endian_store_16(command, pos, 9 + attribute_count*4); 279 pos += 2; 280 command[pos++] = connection->scope; 281 big_endian_store_32(command, pos, connection->start_item); 282 pos += 4; 283 big_endian_store_32(command, pos, connection->end_item); 284 pos += 4; 285 command[pos++] = attribute_count; 286 287 int bit_position = 1; 288 while (attributes_to_copy){ 289 if (connection->attr_bitmap & (1 << bit_position)){ 290 big_endian_store_32(command, pos, bit_position); 291 pos += 4; 292 attributes_to_copy--; 293 } 294 bit_position++; 295 } 296 297 return l2cap_send(cid, command, pos); 298 } 299 300 301 static int avrcp_browsing_controller_send_get_item_attributes_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 302 uint8_t command[100]; 303 int pos = 0; 304 // transport header 305 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 306 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 307 // Profile IDentifier (PID) 308 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 309 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 310 command[pos++] = AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES; 311 312 uint32_t attribute_count = 0; 313 uint32_t attributes_to_copy = 0; 314 315 switch (connection->attr_bitmap){ 316 case AVRCP_MEDIA_ATTR_NONE: 317 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 318 break; 319 case AVRCP_MEDIA_ATTR_ALL: 320 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 321 break; 322 default: 323 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 324 attributes_to_copy = attribute_count; 325 break; 326 } 327 328 big_endian_store_16(command, pos, 12 + attribute_count*4); 329 pos += 2; 330 331 command[pos++] = connection->scope; 332 memcpy(command+pos, connection->folder_uid, 8); 333 pos += 8; 334 big_endian_store_16(command, pos, connection->uid_counter); 335 pos += 2; 336 command[pos++] = attribute_count; 337 338 int bit_position = 1; 339 while (attributes_to_copy){ 340 if (connection->attr_bitmap & (1 << bit_position)){ 341 big_endian_store_32(command, pos, bit_position); 342 pos += 4; 343 attributes_to_copy--; 344 } 345 bit_position++; 346 } 347 348 return l2cap_send(cid, command, pos); 349 } 350 351 352 static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 353 uint8_t command[100]; 354 int pos = 0; 355 // transport header 356 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 357 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 358 // Profile IDentifier (PID) 359 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 360 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 361 command[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 362 363 big_endian_store_16(command, pos, 11); 364 pos += 2; 365 pos += 2; 366 command[pos++] = connection->direction; 367 memcpy(command+pos, connection->folder_uid, 8); 368 pos += 8; 369 return l2cap_send(cid, command, pos); 370 } 371 372 static int avrcp_browsing_controller_send_search_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 373 uint8_t command[100]; 374 int pos = 0; 375 // transport header 376 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 377 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 378 // Profile IDentifier (PID) 379 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 380 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 381 command[pos++] = AVRCP_PDU_ID_SEARCH; 382 383 big_endian_store_16(command, pos, 4 + connection->search_str_len); 384 pos += 2; 385 386 big_endian_store_16(command, pos, 0x006A); 387 pos += 2; 388 big_endian_store_16(command, pos, connection->search_str_len); 389 pos += 2; 390 391 memcpy(command+pos,connection->search_str, connection->search_str_len); 392 pos += connection->search_str_len; 393 return l2cap_send(cid, command, pos); 394 } 395 396 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 397 uint8_t command[100]; 398 int pos = 0; 399 // transport header 400 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 401 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 402 // Profile IDentifier (PID) 403 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 404 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 405 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 406 407 big_endian_store_16(command, pos, 2); 408 pos += 2; 409 big_endian_store_16(command, pos, connection->browsed_player_id); 410 pos += 2; 411 return l2cap_send(cid, command, pos); 412 } 413 414 static int avrcp_browsing_controller_send_get_total_nr_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 415 uint8_t command[7]; 416 int pos = 0; 417 // transport header 418 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 419 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 420 // Profile IDentifier (PID) 421 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 422 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 423 command[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 424 425 big_endian_store_16(command, pos, 1); 426 pos += 2; 427 command[pos++] = connection->get_total_nr_items_scope; 428 return l2cap_send(cid, command, pos); 429 } 430 431 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 432 switch (connection->state){ 433 case AVCTP_CONNECTION_OPENED: 434 if (connection->set_browsed_player_id){ 435 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 436 connection->set_browsed_player_id = 0; 437 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 438 break; 439 } 440 441 if (connection->get_total_nr_items){ 442 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 443 connection->get_total_nr_items = 0; 444 avrcp_browsing_controller_send_get_total_nr_items_cmd(connection->l2cap_browsing_cid, connection); 445 break; 446 } 447 448 if (connection->get_folder_items){ 449 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 450 connection->get_folder_items = 0; 451 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 452 break; 453 } 454 455 if (connection->get_item_attributes){ 456 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 457 connection->get_item_attributes = 0; 458 avrcp_browsing_controller_send_get_item_attributes_cmd(connection->l2cap_browsing_cid, connection); 459 break; 460 } 461 462 if (connection->change_path){ 463 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 464 connection->change_path = 0; 465 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 466 break; 467 } 468 469 if (connection->search){ 470 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 471 connection->search = 0; 472 avrcp_browsing_controller_send_search_cmd(connection->l2cap_browsing_cid, connection); 473 break; 474 } 475 break; 476 default: 477 return; 478 } 479 } 480 481 482 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){ 483 if (!callback) return; 484 uint8_t event[9]; 485 int pos = 0; 486 event[pos++] = HCI_EVENT_AVRCP_META; 487 event[pos++] = sizeof(event) - 2; 488 event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE; 489 little_endian_store_16(event, pos, browsing_cid); 490 pos += 2; 491 little_endian_store_16(event, pos, uid_counter); 492 pos += 2; 493 event[pos++] = browsing_status; 494 event[pos++] = bluetooth_status; 495 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 496 } 497 498 static void avrcp_parser_reset(avrcp_browsing_connection_t * connection){ 499 connection->parser_attribute_header_pos = 0; 500 connection->parsed_attribute_value_offset = 0; 501 connection->parsed_num_attributes = 0; 502 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 503 } 504 505 506 static void avrcp_browsing_parser_process_byte(uint8_t byte, avrcp_browsing_connection_t * connection){ 507 uint8_t prepended_header_size = 1; 508 switch(connection->parser_state){ 509 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER:{ 510 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 511 if (connection->parser_attribute_header_pos < AVRCP_BROWSING_ITEM_HEADER_LEN) break; 512 513 uint16_t attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 1); 514 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = connection->parser_attribute_header[0]; // prepend with item type 515 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 516 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 517 // 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); 518 break; 519 } 520 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE:{ 521 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = byte; 522 if (connection->parsed_attribute_value_offset < connection->parsed_attribute_value_len + prepended_header_size){ 523 break; 524 } 525 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1)){ 526 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 527 break; 528 } 529 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 530 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 531 connection->parsed_num_attributes++; 532 connection->parsed_attribute_value_offset = 0; 533 connection->parser_attribute_header_pos = 0; 534 535 if (connection->parsed_num_attributes == connection->num_items){ 536 avrcp_parser_reset(connection); 537 break; 538 } 539 break; 540 } 541 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 542 connection->parsed_attribute_value_offset++; 543 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1) + prepended_header_size){ 544 break; 545 } 546 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 547 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 548 connection->parsed_num_attributes++; 549 connection->parsed_attribute_value_offset = 0; 550 connection->parser_attribute_header_pos = 0; 551 552 if (connection->parsed_num_attributes == connection->num_items){ 553 avrcp_parser_reset(connection); 554 break; 555 } 556 break; 557 default: 558 break; 559 } 560 } 561 562 static void avrcp_browsing_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_browsing_connection_t * connection){ 563 int i; 564 for (i=0;i<num_bytes_to_read;i++){ 565 avrcp_browsing_parser_process_byte(packet[i], connection); 566 } 567 } 568 569 static void avrcp_browsing_controller_emit_failed(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 570 avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status); 571 } 572 573 574 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 575 avrcp_browsing_connection_t * browsing_connection; 576 577 switch (packet_type) { 578 case L2CAP_DATA_PACKET:{ 579 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 580 if (!browsing_connection) break; 581 int pos = 0; 582 uint8_t transport_header = packet[pos++]; 583 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 584 // uint8_t transaction_label = transport_header >> 4; 585 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 586 // printf("L2CAP_DATA_PACKET, packet type %d\n", avctp_packet_type); 587 switch (avctp_packet_type){ 588 case AVRCP_SINGLE_PACKET: 589 case AVRCP_START_PACKET: 590 // uint8_t frame_type = (transport_header & 0x03) >> 1; 591 // uint8_t ipid = transport_header & 0x01; 592 pos += 2; 593 browsing_connection->num_packets = 1; 594 if (avctp_packet_type == AVRCP_START_PACKET){ 595 browsing_connection->num_packets = packet[pos++]; 596 } 597 if (pos + 4 > size){ 598 browsing_connection->state = AVCTP_CONNECTION_OPENED; 599 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 600 return; 601 } 602 browsing_connection->pdu_id = packet[pos++]; 603 // uint16_t length = big_endian_read_16(packet, pos); 604 pos += 2; 605 browsing_connection->browsing_status = packet[pos++]; 606 if (browsing_connection->browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 607 browsing_connection->state = AVCTP_CONNECTION_OPENED; 608 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 609 return; 610 } 611 break; 612 default: 613 break; 614 } 615 616 uint32_t i; 617 switch(browsing_connection->pdu_id){ 618 case AVRCP_PDU_ID_CHANGE_PATH: 619 // printf("AVRCP_PDU_ID_CHANGE_PATH \n"); 620 break; 621 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 622 // printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n"); 623 break; 624 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 625 uint32_t num_items = big_endian_read_32(packet, pos); 626 pos += 4; 627 printf("TODO: send event, uid_counter %d, num_items %d\n", browsing_connection->uid_counter, num_items); 628 break; 629 } 630 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 631 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 632 pos += 2; 633 // uint32_t num_items = big_endian_read_32(packet, pos); 634 pos += 4; 635 // uint16_t charset = big_endian_read_16(packet, pos); 636 pos += 2; 637 uint8_t folder_depth = packet[pos++]; 638 639 for (i = 0; i < folder_depth; i++){ 640 uint16_t folder_name_length = big_endian_read_16(packet, pos); 641 pos += 2; 642 // reuse packet and add data type as a header 643 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 644 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1); 645 pos += folder_name_length; 646 } 647 break; 648 } 649 650 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 651 switch (avctp_packet_type){ 652 case AVRCP_SINGLE_PACKET: 653 case AVRCP_START_PACKET: 654 avrcp_parser_reset(browsing_connection); 655 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 656 pos += 2; 657 browsing_connection->num_items = big_endian_read_16(packet, pos); //num_items 658 pos += 2; 659 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 660 break; 661 662 case AVRCP_CONTINUE_PACKET: 663 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 664 break; 665 666 case AVRCP_END_PACKET: 667 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 668 avrcp_parser_reset(browsing_connection); 669 break; 670 } 671 break; 672 } 673 674 case AVRCP_PDU_ID_SEARCH:{ 675 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 676 pos += 2; 677 uint32_t num_items = big_endian_read_32(packet, pos); 678 printf("TODO: send as event, search found %d items\n", num_items); 679 break; 680 } 681 case AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES: 682 packet[pos-1] = AVRCP_BROWSING_MEDIA_ELEMENT_ITEM_ATTRIBUTE; 683 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, size - pos + 1); 684 break; 685 686 default: 687 printf(" not parsed pdu ID 0x%02x\n", browsing_connection->pdu_id); 688 break; 689 } 690 691 switch (avctp_packet_type){ 692 case AVRCP_SINGLE_PACKET: 693 case AVRCP_END_PACKET: 694 // printf("reset browsing connection state to OPENED\n"); 695 browsing_connection->state = AVCTP_CONNECTION_OPENED; 696 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); 697 break; 698 default: 699 break; 700 } 701 // printf(" paket done\n"); 702 break; 703 } 704 case HCI_EVENT_PACKET: 705 switch (hci_event_packet_get_type(packet)){ 706 case L2CAP_EVENT_CAN_SEND_NOW: 707 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 708 if (!browsing_connection) break; 709 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 710 break; 711 default: 712 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 713 break; 714 } 715 break; 716 717 default: 718 break; 719 } 720 } 721 722 void avrcp_browsing_controller_init(void){ 723 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 724 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0); 725 } 726 727 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 728 if (callback == NULL){ 729 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 730 return; 731 } 732 avrcp_controller_context.browsing_avrcp_callback = callback; 733 } 734 735 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){ 736 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 737 } 738 739 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 740 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 741 if (!avrcp_connection){ 742 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 743 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 744 } 745 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 746 747 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 748 return ERROR_CODE_SUCCESS; 749 } 750 751 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){ 752 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 753 if (!avrcp_connection){ 754 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 755 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 756 } 757 if (!avrcp_connection->browsing_connection){ 758 log_error("avrcp_browsing_controller_decline_incoming_connection: no browsing connection."); 759 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 760 } 761 762 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 763 log_error("avrcp_browsing_controller_decline_incoming_connection: browsing connection in a wrong state."); 764 return ERROR_CODE_COMMAND_DISALLOWED; 765 } 766 767 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 768 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 769 avrcp_connection->browsing_connection->ertm_buffer_size = size; 770 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 771 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); 772 return ERROR_CODE_SUCCESS; 773 } 774 775 uint8_t avrcp_browsing_controller_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 776 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 777 if (!avrcp_connection){ 778 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 779 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 780 } 781 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 782 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 783 784 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 785 // free connection 786 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 787 avrcp_connection->browsing_connection = NULL; 788 return ERROR_CODE_SUCCESS; 789 } 790 791 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){ 792 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 793 if (!avrcp_connection){ 794 log_error("avrcp_browsing_controller_get_item_attributes: could not find a connection."); 795 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 796 } 797 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 798 if (connection->state != AVCTP_CONNECTION_OPENED){ 799 log_error("avrcp_browsing_controller_get_item_attributes: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 800 return ERROR_CODE_COMMAND_DISALLOWED; 801 } 802 803 connection->get_item_attributes = 1; 804 connection->scope = scope; 805 memcpy(connection->folder_uid, uid, 8); 806 connection->uid_counter = uid_counter; 807 connection->attr_bitmap = attr_bitmap; 808 809 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 810 return ERROR_CODE_SUCCESS; 811 } 812 813 /** 814 * @brief Retrieve a listing of the contents of a folder. 815 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 816 * @param start_item 817 * @param end_item 818 * @param attribute_count 819 * @param attribute_list 820 **/ 821 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){ 822 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 823 if (!avrcp_connection){ 824 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 825 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 826 } 827 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 828 if (connection->state != AVCTP_CONNECTION_OPENED) { 829 log_error("avrcp_browsing_controller_get_folder_items: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 830 printf("avrcp_browsing_controller_get_folder_items: : connection in wrong state %d, expected %d\n", connection->state, AVCTP_CONNECTION_OPENED); 831 return ERROR_CODE_COMMAND_DISALLOWED; 832 } 833 834 connection->get_folder_items = 1; 835 connection->scope = scope; 836 connection->start_item = start_item; 837 connection->end_item = end_item; 838 connection->attr_bitmap = attr_bitmap; 839 840 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 841 return ERROR_CODE_SUCCESS; 842 } 843 844 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){ 845 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap); 846 } 847 848 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){ 849 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 850 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap); 851 } 852 853 uint8_t avrcp_browsing_controller_browse_media(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, 2, 0, 0xFFFFFFFF, 0, NULL); 855 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap); 856 } 857 858 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){ 859 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap); 860 } 861 862 863 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 864 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 865 if (!avrcp_connection){ 866 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 867 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 868 } 869 870 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 871 if (connection->state != AVCTP_CONNECTION_OPENED){ 872 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 873 return ERROR_CODE_COMMAND_DISALLOWED; 874 } 875 876 connection->set_browsed_player_id = 1; 877 connection->browsed_player_id = browsed_player_id; 878 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 879 return ERROR_CODE_SUCCESS; 880 } 881 882 /** 883 * @brief Retrieve a listing of the contents of a folder. 884 * @param direction 0-folder up, 1-folder down 885 * @param folder_uid 8 bytes long 886 **/ 887 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 888 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 889 if (!avrcp_connection){ 890 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 891 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 892 } 893 894 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 895 896 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 897 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 898 return ERROR_CODE_COMMAND_DISALLOWED; 899 } 900 901 if (!connection->browsed_player_id){ 902 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 903 return ERROR_CODE_COMMAND_DISALLOWED; 904 } 905 printf(" send change path\n"); 906 connection->change_path = 1; 907 connection->direction = direction; 908 memset(connection->folder_uid, 0, 8); 909 if (folder_uid){ 910 memcpy(connection->folder_uid, folder_uid, 8); 911 } 912 913 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 914 return ERROR_CODE_SUCCESS; 915 } 916 917 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 918 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL); 919 } 920 921 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 922 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 923 } 924 925 uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str){ 926 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 927 if (!avrcp_connection){ 928 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 929 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 930 } 931 932 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 933 934 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 935 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 936 return ERROR_CODE_COMMAND_DISALLOWED; 937 } 938 939 if (!connection->browsed_player_id){ 940 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 941 return ERROR_CODE_COMMAND_DISALLOWED; 942 } 943 if (!search_str || search_str_len == 0){ 944 return AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND; 945 } 946 947 connection->search = 1; 948 949 connection->search_str_len = btstack_min(search_str_len, sizeof(connection->search_str)-1); 950 memset(connection->search_str, 0, sizeof(connection->search_str)); 951 memcpy(connection->search_str, search_str, connection->search_str_len); 952 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 953 return ERROR_CODE_SUCCESS; 954 } 955 956 uint8_t avrcp_browsing_controller_get_total_nr_items_for_scope(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope){ 957 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 958 if (!avrcp_connection){ 959 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 960 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 961 } 962 963 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 964 965 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 966 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 967 return ERROR_CODE_COMMAND_DISALLOWED; 968 } 969 970 if (!connection->browsed_player_id){ 971 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 972 return ERROR_CODE_COMMAND_DISALLOWED; 973 } 974 connection->get_total_nr_items = 1; 975 connection->get_total_nr_items_scope = scope; 976 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 977 return ERROR_CODE_SUCCESS; 978 }