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; 165 166 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 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 226 227 browsing_connection->l2cap_browsing_cid = local_cid; 228 229 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 230 browsing_connection->state = AVCTP_CONNECTION_OPENED; 231 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 232 break; 233 234 case L2CAP_EVENT_CHANNEL_CLOSED: 235 // data: event (8), len(8), channel (16) 236 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 237 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 238 239 if (avrcp_connection && avrcp_connection->browsing_connection){ 240 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 241 // free connection 242 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 243 avrcp_connection->browsing_connection = NULL; 244 break; 245 } 246 break; 247 default: 248 break; 249 } 250 } 251 252 static int avrcp_browsing_controller_send_get_folder_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 253 uint8_t command[100]; 254 int pos = 0; 255 256 // // if (connection->cmd_operands[3] == AVRCP_PDU_ID_GET_CAPABILITIES){ 257 // printf("cheet\n"); 258 // uint8_t buffer[] = {0xB0, 0x11, 0x0E, 0xFF, 0x00, 0x02, 0xFF, 0xFF}; 259 // memcpy(command, buffer, sizeof(buffer)); 260 // pos = sizeof(buffer); 261 // return l2cap_send(cid, command, pos); 262 // // } 263 264 // transport header 265 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 266 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 267 // Profile IDentifier (PID) 268 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 269 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 270 command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 271 272 uint32_t attribute_count = 0; 273 uint32_t attributes_to_copy = 0; 274 275 switch (connection->attr_bitmap){ 276 case AVRCP_MEDIA_ATTR_NONE: 277 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 278 break; 279 case AVRCP_MEDIA_ATTR_ALL: 280 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 281 break; 282 default: 283 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 284 attributes_to_copy = attribute_count; 285 break; 286 } 287 288 big_endian_store_16(command, pos, 9 + attribute_count*4); 289 pos += 2; 290 command[pos++] = connection->scope; 291 big_endian_store_32(command, pos, connection->start_item); 292 pos += 4; 293 big_endian_store_32(command, pos, connection->end_item); 294 pos += 4; 295 command[pos++] = attribute_count; 296 297 int bit_position = 1; 298 while (attributes_to_copy){ 299 if (connection->attr_bitmap & (1 << bit_position)){ 300 big_endian_store_32(command, pos, bit_position); 301 pos += 4; 302 attributes_to_copy--; 303 } 304 bit_position++; 305 } 306 307 308 return l2cap_send(cid, command, pos); 309 } 310 311 312 static int avrcp_browsing_controller_send_get_item_attributes_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 313 uint8_t command[100]; 314 int pos = 0; 315 // transport header 316 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 317 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 318 // Profile IDentifier (PID) 319 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 320 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 321 command[pos++] = AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES; 322 323 uint32_t attribute_count = 0; 324 uint32_t attributes_to_copy = 0; 325 326 switch (connection->attr_bitmap){ 327 case AVRCP_MEDIA_ATTR_NONE: 328 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 329 break; 330 case AVRCP_MEDIA_ATTR_ALL: 331 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 332 break; 333 default: 334 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 335 attributes_to_copy = attribute_count; 336 break; 337 } 338 339 big_endian_store_16(command, pos, 12 + attribute_count*4); 340 pos += 2; 341 342 command[pos++] = connection->scope; 343 memcpy(command+pos, connection->folder_uid, 8); 344 pos += 8; 345 big_endian_store_16(command, pos, connection->uid_counter); 346 pos += 2; 347 command[pos++] = attribute_count; 348 349 int bit_position = 1; 350 while (attributes_to_copy){ 351 if (connection->attr_bitmap & (1 << bit_position)){ 352 big_endian_store_32(command, pos, bit_position); 353 pos += 4; 354 attributes_to_copy--; 355 } 356 bit_position++; 357 } 358 359 return l2cap_send(cid, command, pos); 360 } 361 362 363 static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 364 uint8_t command[100]; 365 int pos = 0; 366 // transport header 367 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 368 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 369 // Profile IDentifier (PID) 370 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 371 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 372 command[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 373 374 big_endian_store_16(command, pos, 11); 375 pos += 2; 376 pos += 2; 377 command[pos++] = connection->direction; 378 memcpy(command+pos, connection->folder_uid, 8); 379 pos += 8; 380 return l2cap_send(cid, command, pos); 381 } 382 383 static int avrcp_browsing_controller_send_search_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 384 uint8_t command[100]; 385 int pos = 0; 386 // transport header 387 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 388 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 389 // Profile IDentifier (PID) 390 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 391 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 392 command[pos++] = AVRCP_PDU_ID_SEARCH; 393 394 big_endian_store_16(command, pos, 4 + connection->search_str_len); 395 pos += 2; 396 397 big_endian_store_16(command, pos, 0x006A); 398 pos += 2; 399 big_endian_store_16(command, pos, connection->search_str_len); 400 pos += 2; 401 402 memcpy(command+pos,connection->search_str, connection->search_str_len); 403 pos += connection->search_str_len; 404 return l2cap_send(cid, command, pos); 405 } 406 407 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 408 uint8_t command[100]; 409 int pos = 0; 410 // transport header 411 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 412 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 413 // Profile IDentifier (PID) 414 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 415 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 416 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 417 418 big_endian_store_16(command, pos, 2); 419 pos += 2; 420 big_endian_store_16(command, pos, connection->browsed_player_id); 421 pos += 2; 422 return l2cap_send(cid, command, pos); 423 } 424 425 static int avrcp_browsing_controller_send_get_total_nr_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 426 uint8_t command[7]; 427 int pos = 0; 428 // transport header 429 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 430 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 431 // Profile IDentifier (PID) 432 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 433 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 434 command[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 435 436 big_endian_store_16(command, pos, 1); 437 pos += 2; 438 command[pos++] = connection->get_total_nr_items_scope; 439 return l2cap_send(cid, command, pos); 440 } 441 442 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 443 switch (connection->state){ 444 case AVCTP_CONNECTION_OPENED: 445 if (connection->set_browsed_player_id){ 446 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 447 connection->set_browsed_player_id = 0; 448 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 449 break; 450 } 451 452 if (connection->get_total_nr_items){ 453 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 454 connection->get_total_nr_items = 0; 455 avrcp_browsing_controller_send_get_total_nr_items_cmd(connection->l2cap_browsing_cid, connection); 456 break; 457 } 458 459 if (connection->get_folder_items){ 460 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 461 connection->get_folder_items = 0; 462 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 463 break; 464 } 465 466 if (connection->get_item_attributes){ 467 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 468 connection->get_item_attributes = 0; 469 avrcp_browsing_controller_send_get_item_attributes_cmd(connection->l2cap_browsing_cid, connection); 470 break; 471 } 472 473 if (connection->change_path){ 474 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 475 connection->change_path = 0; 476 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 477 break; 478 } 479 480 if (connection->search){ 481 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 482 connection->search = 0; 483 avrcp_browsing_controller_send_search_cmd(connection->l2cap_browsing_cid, connection); 484 break; 485 } 486 break; 487 default: 488 return; 489 } 490 } 491 492 493 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){ 494 if (!callback) return; 495 uint8_t event[9]; 496 int pos = 0; 497 event[pos++] = HCI_EVENT_AVRCP_META; 498 event[pos++] = sizeof(event) - 2; 499 event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE; 500 little_endian_store_16(event, pos, browsing_cid); 501 pos += 2; 502 little_endian_store_16(event, pos, uid_counter); 503 pos += 2; 504 event[pos++] = browsing_status; 505 event[pos++] = bluetooth_status; 506 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 507 } 508 509 static void avrcp_parser_reset(avrcp_browsing_connection_t * connection){ 510 connection->parser_attribute_header_pos = 0; 511 connection->parsed_attribute_value_offset = 0; 512 connection->parsed_num_attributes = 0; 513 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 514 } 515 516 517 static void avrcp_browsing_parser_process_byte(uint8_t byte, avrcp_browsing_connection_t * connection){ 518 uint8_t prepended_header_size = 1; 519 switch(connection->parser_state){ 520 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER:{ 521 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 522 if (connection->parser_attribute_header_pos < AVRCP_BROWSING_ITEM_HEADER_LEN) break; 523 524 uint16_t attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 1); 525 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = connection->parser_attribute_header[0]; // prepend with item type 526 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 527 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 528 // 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); 529 break; 530 } 531 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE:{ 532 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = byte; 533 if (connection->parsed_attribute_value_offset < connection->parsed_attribute_value_len + prepended_header_size){ 534 break; 535 } 536 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1)){ 537 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 538 break; 539 } 540 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 541 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 542 connection->parsed_num_attributes++; 543 connection->parsed_attribute_value_offset = 0; 544 connection->parser_attribute_header_pos = 0; 545 546 if (connection->parsed_num_attributes == connection->num_items){ 547 avrcp_parser_reset(connection); 548 break; 549 } 550 break; 551 } 552 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 553 connection->parsed_attribute_value_offset++; 554 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1) + prepended_header_size){ 555 break; 556 } 557 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 558 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 559 connection->parsed_num_attributes++; 560 connection->parsed_attribute_value_offset = 0; 561 connection->parser_attribute_header_pos = 0; 562 563 if (connection->parsed_num_attributes == connection->num_items){ 564 avrcp_parser_reset(connection); 565 break; 566 } 567 break; 568 default: 569 break; 570 } 571 } 572 573 static void avrcp_browsing_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_browsing_connection_t * connection){ 574 int i; 575 for (i=0;i<num_bytes_to_read;i++){ 576 avrcp_browsing_parser_process_byte(packet[i], connection); 577 } 578 } 579 580 static void avrcp_browsing_controller_emit_failed(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 581 avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status); 582 } 583 584 585 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 586 avrcp_browsing_connection_t * browsing_connection; 587 588 switch (packet_type) { 589 case L2CAP_DATA_PACKET:{ 590 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 591 if (!browsing_connection) break; 592 // printf("received \n"); 593 // printf_hexdump(packet,size); 594 int pos = 0; 595 uint8_t transport_header = packet[pos++]; 596 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 597 browsing_connection->transaction_label = transport_header >> 4; 598 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 599 // printf("L2CAP_DATA_PACKET, packet type %d\n", avctp_packet_type); 600 switch (avctp_packet_type){ 601 case AVRCP_SINGLE_PACKET: 602 case AVRCP_START_PACKET: 603 // uint8_t frame_type = (transport_header & 0x03) >> 1; 604 // uint8_t ipid = transport_header & 0x01; 605 pos += 2; 606 browsing_connection->num_packets = 1; 607 if (avctp_packet_type == AVRCP_START_PACKET){ 608 browsing_connection->num_packets = packet[pos++]; 609 } 610 if (pos + 4 > size){ 611 browsing_connection->state = AVCTP_CONNECTION_OPENED; 612 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 613 return; 614 } 615 browsing_connection->pdu_id = packet[pos++]; 616 // uint16_t length = big_endian_read_16(packet, pos); 617 pos += 2; 618 browsing_connection->browsing_status = packet[pos++]; 619 if (browsing_connection->browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 620 browsing_connection->state = AVCTP_CONNECTION_OPENED; 621 avrcp_browsing_controller_emit_failed(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 622 return; 623 } 624 break; 625 default: 626 break; 627 } 628 629 uint32_t i; 630 switch(browsing_connection->pdu_id){ 631 case AVRCP_PDU_ID_CHANGE_PATH: 632 // printf("AVRCP_PDU_ID_CHANGE_PATH \n"); 633 break; 634 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 635 // printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n"); 636 break; 637 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 638 // uint32_t num_items = big_endian_read_32(packet, pos); 639 // pos += 4; 640 // printf("TODO: send event, uid_counter %d, num_items %d\n", browsing_connection->uid_counter, num_items); 641 break; 642 } 643 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 644 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 645 pos += 2; 646 // uint32_t num_items = big_endian_read_32(packet, pos); 647 pos += 4; 648 // uint16_t charset = big_endian_read_16(packet, pos); 649 pos += 2; 650 uint8_t folder_depth = packet[pos++]; 651 652 for (i = 0; i < folder_depth; i++){ 653 uint16_t folder_name_length = big_endian_read_16(packet, pos); 654 pos += 2; 655 // reuse packet and add data type as a header 656 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 657 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1); 658 pos += folder_name_length; 659 } 660 break; 661 } 662 663 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 664 switch (avctp_packet_type){ 665 case AVRCP_SINGLE_PACKET: 666 case AVRCP_START_PACKET: 667 avrcp_parser_reset(browsing_connection); 668 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 669 pos += 2; 670 browsing_connection->num_items = big_endian_read_16(packet, pos); //num_items 671 pos += 2; 672 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 673 break; 674 675 case AVRCP_CONTINUE_PACKET: 676 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 677 break; 678 679 case AVRCP_END_PACKET: 680 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 681 avrcp_parser_reset(browsing_connection); 682 break; 683 } 684 break; 685 } 686 687 case AVRCP_PDU_ID_SEARCH:{ 688 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 689 pos += 2; 690 // uint32_t num_items = big_endian_read_32(packet, pos); 691 // printf("TODO: send as event, search found %d items\n", num_items); 692 break; 693 } 694 case AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES: 695 packet[pos-1] = AVRCP_BROWSING_MEDIA_ELEMENT_ITEM_ATTRIBUTE; 696 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, size - pos + 1); 697 break; 698 699 default: 700 log_info(" not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 701 break; 702 } 703 704 switch (avctp_packet_type){ 705 case AVRCP_SINGLE_PACKET: 706 case AVRCP_END_PACKET: 707 // printf("reset browsing connection state to OPENED\n"); 708 browsing_connection->state = AVCTP_CONNECTION_OPENED; 709 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); 710 break; 711 default: 712 break; 713 } 714 // printf(" paket done\n"); 715 break; 716 } 717 case HCI_EVENT_PACKET: 718 switch (hci_event_packet_get_type(packet)){ 719 case L2CAP_EVENT_CAN_SEND_NOW: 720 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 721 if (!browsing_connection) break; 722 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 723 break; 724 default: 725 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 726 break; 727 } 728 break; 729 730 default: 731 break; 732 } 733 } 734 735 void avrcp_browsing_controller_init(void){ 736 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 737 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 738 } 739 740 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 741 if (callback == NULL){ 742 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 743 return; 744 } 745 avrcp_controller_context.browsing_avrcp_callback = callback; 746 } 747 748 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){ 749 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 750 } 751 752 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 753 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 754 if (!avrcp_connection){ 755 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 756 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 757 } 758 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 759 760 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 761 return ERROR_CODE_SUCCESS; 762 } 763 764 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){ 765 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 766 if (!avrcp_connection){ 767 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 768 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 769 } 770 if (!avrcp_connection->browsing_connection){ 771 log_error("avrcp_browsing_controller_decline_incoming_connection: no browsing connection."); 772 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 773 } 774 775 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 776 log_error("avrcp_browsing_controller_decline_incoming_connection: browsing connection in a wrong state."); 777 return ERROR_CODE_COMMAND_DISALLOWED; 778 } 779 780 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 781 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 782 avrcp_connection->browsing_connection->ertm_buffer_size = size; 783 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 784 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); 785 return ERROR_CODE_SUCCESS; 786 } 787 788 uint8_t avrcp_browsing_controller_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 789 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 790 if (!avrcp_connection){ 791 log_error("avrcp_browsing_controller_decline_incoming_connection: could not find a connection."); 792 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 793 } 794 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 795 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 796 797 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 798 // free connection 799 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 800 avrcp_connection->browsing_connection = NULL; 801 return ERROR_CODE_SUCCESS; 802 } 803 804 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){ 805 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 806 if (!avrcp_connection){ 807 log_error("avrcp_browsing_controller_get_item_attributes: could not find a connection."); 808 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 809 } 810 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 811 if (connection->state != AVCTP_CONNECTION_OPENED){ 812 log_error("avrcp_browsing_controller_get_item_attributes: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 813 return ERROR_CODE_COMMAND_DISALLOWED; 814 } 815 816 connection->get_item_attributes = 1; 817 connection->scope = scope; 818 memcpy(connection->folder_uid, uid, 8); 819 connection->uid_counter = uid_counter; 820 connection->attr_bitmap = attr_bitmap; 821 822 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 823 return ERROR_CODE_SUCCESS; 824 } 825 826 /** 827 * @brief Retrieve a listing of the contents of a folder. 828 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 829 * @param start_item 830 * @param end_item 831 * @param attribute_count 832 * @param attribute_list 833 **/ 834 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){ 835 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 836 if (!avrcp_connection){ 837 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 838 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 839 } 840 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 841 if (connection->state != AVCTP_CONNECTION_OPENED) { 842 log_error("avrcp_browsing_controller_get_folder_items: connection in wrong state %d, expected %d.", connection->state, AVCTP_CONNECTION_OPENED); 843 return ERROR_CODE_COMMAND_DISALLOWED; 844 } 845 846 connection->get_folder_items = 1; 847 connection->scope = scope; 848 connection->start_item = start_item; 849 connection->end_item = end_item; 850 connection->attr_bitmap = attr_bitmap; 851 852 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 853 return ERROR_CODE_SUCCESS; 854 } 855 856 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){ 857 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap); 858 } 859 860 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){ 861 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 862 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap); 863 } 864 865 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 866 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 867 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap); 868 } 869 870 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){ 871 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap); 872 } 873 874 875 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 876 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 877 if (!avrcp_connection){ 878 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 879 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 880 } 881 882 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 883 if (connection->state != AVCTP_CONNECTION_OPENED){ 884 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 885 return ERROR_CODE_COMMAND_DISALLOWED; 886 } 887 888 connection->set_browsed_player_id = 1; 889 connection->browsed_player_id = browsed_player_id; 890 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 891 return ERROR_CODE_SUCCESS; 892 } 893 894 /** 895 * @brief Retrieve a listing of the contents of a folder. 896 * @param direction 0-folder up, 1-folder down 897 * @param folder_uid 8 bytes long 898 **/ 899 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 900 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 901 if (!avrcp_connection){ 902 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 903 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 904 } 905 906 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 907 908 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 909 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 910 return ERROR_CODE_COMMAND_DISALLOWED; 911 } 912 913 if (!connection->browsed_player_id){ 914 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 915 return ERROR_CODE_COMMAND_DISALLOWED; 916 } 917 connection->change_path = 1; 918 connection->direction = direction; 919 memset(connection->folder_uid, 0, 8); 920 if (folder_uid){ 921 memcpy(connection->folder_uid, folder_uid, 8); 922 } 923 924 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 925 return ERROR_CODE_SUCCESS; 926 } 927 928 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 929 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL); 930 } 931 932 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 933 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 934 } 935 936 uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str){ 937 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 938 if (!avrcp_connection){ 939 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 940 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 941 } 942 943 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 944 945 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 946 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 947 return ERROR_CODE_COMMAND_DISALLOWED; 948 } 949 950 if (!connection->browsed_player_id){ 951 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 952 return ERROR_CODE_COMMAND_DISALLOWED; 953 } 954 if (!search_str || search_str_len == 0){ 955 return AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND; 956 } 957 958 connection->search = 1; 959 960 connection->search_str_len = btstack_min(search_str_len, sizeof(connection->search_str)-1); 961 memset(connection->search_str, 0, sizeof(connection->search_str)); 962 memcpy(connection->search_str, search_str, connection->search_str_len); 963 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 964 return ERROR_CODE_SUCCESS; 965 } 966 967 uint8_t avrcp_browsing_controller_get_total_nr_items_for_scope(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope){ 968 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 969 if (!avrcp_connection){ 970 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 971 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 972 } 973 974 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 975 976 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 977 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 978 return ERROR_CODE_COMMAND_DISALLOWED; 979 } 980 981 if (!connection->browsed_player_id){ 982 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 983 return ERROR_CODE_COMMAND_DISALLOWED; 984 } 985 connection->get_total_nr_items = 1; 986 connection->get_total_nr_items_scope = scope; 987 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 988 return ERROR_CODE_SUCCESS; 989 } 990