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 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 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 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, 10 + attribute_count); 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 static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 301 uint8_t command[100]; 302 int pos = 0; 303 // transport header 304 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 305 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 306 // Profile IDentifier (PID) 307 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 308 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 309 command[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 310 311 big_endian_store_16(command, pos, 11); 312 pos += 2; 313 big_endian_store_16(command, pos, connection->browsed_player_uid_counter); 314 pos += 2; 315 command[pos++] = connection->direction; 316 memcpy(command+pos, connection->folder_uid, 8); 317 pos += 8; 318 return l2cap_send(cid, command, pos); 319 } 320 321 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 322 uint8_t command[100]; 323 int pos = 0; 324 // transport header 325 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 326 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 327 // Profile IDentifier (PID) 328 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 329 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 330 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 331 332 big_endian_store_16(command, pos, 2); 333 pos += 2; 334 big_endian_store_16(command, pos, connection->browsed_player_id); 335 pos += 2; 336 return l2cap_send(cid, command, pos); 337 } 338 339 static int avrcp_browsing_controller_send_set_addressed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 340 uint8_t command[100]; 341 int pos = 0; 342 // transport header 343 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 344 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 345 // Profile IDentifier (PID) 346 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 347 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 348 command[pos++] = AVRCP_PDU_ID_SET_ADDRESSED_PLAYER; 349 350 big_endian_store_16(command, pos, 2); 351 pos += 2; 352 big_endian_store_16(command, pos, connection->addressed_player_id); 353 pos += 2; 354 return l2cap_send(cid, command, pos); 355 } 356 357 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 358 switch (connection->state){ 359 case AVCTP_CONNECTION_OPENED: 360 if (connection->set_browsed_player_id){ 361 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 362 connection->set_browsed_player_id = 0; 363 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 364 break; 365 } 366 367 if (connection->set_addressed_player_id){ 368 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 369 connection->set_addressed_player_id = 0; 370 avrcp_browsing_controller_send_set_addressed_player_cmd(connection->l2cap_browsing_cid, connection); 371 break; 372 } 373 374 if (connection->get_folder_item){ 375 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 376 connection->get_folder_item = 0; 377 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 378 break; 379 } 380 if (connection->change_path){ 381 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 382 connection->change_path = 0; 383 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 384 break; 385 } 386 break; 387 default: 388 return; 389 } 390 } 391 392 393 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){ 394 if (!callback) return; 395 uint8_t event[9]; 396 int pos = 0; 397 event[pos++] = HCI_EVENT_AVRCP_META; 398 event[pos++] = sizeof(event) - 2; 399 event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE; 400 little_endian_store_16(event, pos, browsing_cid); 401 pos += 2; 402 little_endian_store_16(event, pos, uid_counter); 403 pos += 2; 404 event[pos++] = browsing_status; 405 event[pos++] = bluetooth_status; 406 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 407 } 408 409 static void avrcp_browsing_controller_emit_done(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 410 avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status); 411 } 412 413 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 414 avrcp_browsing_connection_t * browsing_connection; 415 416 switch (packet_type) { 417 case L2CAP_DATA_PACKET:{ 418 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 419 if (!browsing_connection) break; 420 int pos = 0; 421 uint8_t transport_header = packet[pos++]; 422 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 423 // uint8_t transaction_label = transport_header >> 4; 424 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 425 426 avrcp_pdu_id_t pdu_id; 427 uint8_t browsing_status; 428 uint16_t uid_counter; 429 if (!browsing_connection->fragmented){ 430 browsing_connection->state = AVCTP_CONNECTION_OPENED; 431 // printf_hexdump(packet, size); 432 // uint8_t frame_type = (transport_header & 0x03) >> 1; 433 // uint8_t ipid = transport_header & 0x01; 434 pos += 2; 435 browsing_connection->num_packets = 1; 436 if (avctp_packet_type == AVRCP_START_PACKET){ 437 browsing_connection->num_packets = packet[pos++]; 438 } 439 440 if (pos + 4 > size){ 441 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 442 return; 443 } 444 pdu_id = packet[pos++]; 445 // uint16_t length = big_endian_read_16(packet, pos); 446 pos += 2; 447 browsing_status = packet[pos++]; 448 if (browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 449 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_status, ERROR_CODE_SUCCESS); 450 return; 451 } 452 uid_counter = big_endian_read_16(packet, pos); 453 pos += 2; 454 } else { 455 pdu_id = browsing_connection->fragmented_pdu_id; 456 browsing_status = browsing_connection->fragmented_browsing_status; 457 uid_counter = browsing_connection->fragmented_uid_counter; 458 } 459 460 uint32_t i; 461 switch(pdu_id){ 462 case AVRCP_PDU_ID_CHANGE_PATH: 463 printf("AVRCP_PDU_ID_CHANGE_PATH \n"); 464 break; 465 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 466 printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n"); 467 break; 468 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 469 browsing_connection->browsed_player_uid_counter = uid_counter; 470 // uint32_t num_items = big_endian_read_32(packet, pos); 471 pos += 4; 472 // uint16_t charset = big_endian_read_16(packet, pos); 473 pos += 2; 474 uint8_t folder_depth = packet[pos++]; 475 476 for (i = 0; i < folder_depth; i++){ 477 uint16_t folder_name_length = big_endian_read_16(packet, pos); 478 pos += 2; 479 // reuse packet and add data type as a header 480 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 481 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1); 482 pos += folder_name_length; 483 } 484 if (avctp_packet_type == AVRCP_SINGLE_PACKET || avctp_packet_type == AVRCP_END_PACKET){ 485 avrcp_browsing_controller_emit_done_with_uid_counter(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsed_player_uid_counter, browsing_status, ERROR_CODE_SUCCESS); 486 } 487 break; 488 } 489 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 490 printf("AVRCP_PDU_ID_GET_FOLDER_ITEMS \n"); 491 // send UID counter with done 492 if (!browsing_connection->fragmented){ 493 browsing_connection->num_items = big_endian_read_16(packet, pos); 494 pos += 2; 495 } 496 while (pos < size){ 497 uint8_t header_size = 1; 498 if (browsing_connection->fragment_size == 0){ 499 browsing_connection->item_type = packet[pos++]; 500 browsing_connection->item_length = big_endian_read_16(packet, pos); 501 pos += 2; 502 // reuse packet and add data type as a header 503 packet[pos-1] = browsing_connection->item_type; 504 505 if (browsing_connection->item_length + pos > size) { 506 browsing_connection->fragment_size = size - pos; 507 browsing_connection->fragment[0] = browsing_connection->item_type; 508 memcpy(&browsing_connection->fragment[header_size], &packet[pos], browsing_connection->fragment_size); 509 break; 510 } 511 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, &packet[pos-header_size], browsing_connection->item_length+header_size); 512 browsing_connection->num_items--; 513 pos += browsing_connection->item_length; 514 } else { 515 uint16_t remaining_bytes_to_copy = browsing_connection->item_length - browsing_connection->fragment_size; 516 if (remaining_bytes_to_copy + pos > size) { 517 memcpy(&browsing_connection->fragment[browsing_connection->fragment_size+1], &packet[pos], size - pos); 518 browsing_connection->fragment_size += size - pos; 519 break; 520 } 521 memcpy(&browsing_connection->fragment[browsing_connection->fragment_size+1], &packet[pos], remaining_bytes_to_copy); 522 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, browsing_connection->fragment, browsing_connection->item_length+1); 523 browsing_connection->num_items--; 524 browsing_connection->fragment_size = 0; 525 pos += remaining_bytes_to_copy; 526 } 527 } 528 break; 529 } 530 default: 531 break; 532 } 533 534 switch (avctp_packet_type){ 535 case AVRCP_SINGLE_PACKET: 536 case AVRCP_END_PACKET: 537 browsing_connection->state = AVCTP_CONNECTION_OPENED; 538 browsing_connection->fragmented = 0; 539 browsing_connection->num_items = 0; 540 browsing_connection->fragment_size = 0; 541 avrcp_browsing_controller_emit_done_with_uid_counter(avrcp_controller_context.browsing_avrcp_callback, channel, uid_counter, browsing_status, ERROR_CODE_SUCCESS); 542 break; 543 case AVRCP_START_PACKET: 544 browsing_connection->fragmented = 1; 545 browsing_connection->fragmented_pdu_id = pdu_id; 546 browsing_connection->fragmented_browsing_status = browsing_status; 547 break; 548 case AVRCP_CONTINUE_PACKET: 549 browsing_connection->fragmented = 1; 550 break; 551 } 552 break; 553 } 554 case HCI_EVENT_PACKET: 555 switch (hci_event_packet_get_type(packet)){ 556 case L2CAP_EVENT_CAN_SEND_NOW: 557 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 558 if (!browsing_connection) break; 559 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 560 break; 561 default: 562 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 563 break; 564 } 565 default: 566 break; 567 } 568 } 569 570 void avrcp_browsing_controller_init(void){ 571 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 572 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0); 573 } 574 575 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 576 if (callback == NULL){ 577 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 578 return; 579 } 580 avrcp_controller_context.browsing_avrcp_callback = callback; 581 } 582 583 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){ 584 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 585 } 586 587 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 588 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 589 if (!avrcp_connection){ 590 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 591 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 592 } 593 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 594 595 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 596 return ERROR_CODE_SUCCESS; 597 } 598 599 uint8_t avrcp_avrcp_browsing_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config){ 600 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 601 if (!avrcp_connection){ 602 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 603 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 604 } 605 if (!avrcp_connection->browsing_connection){ 606 log_error("avrcp_avrcp_browsing_decline_incoming_connection: no browsing connection."); 607 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 608 } 609 610 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 611 log_error("avrcp_avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state."); 612 return ERROR_CODE_COMMAND_DISALLOWED; 613 } 614 615 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 616 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 617 avrcp_connection->browsing_connection->ertm_buffer_size = size; 618 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 619 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); 620 return ERROR_CODE_SUCCESS; 621 } 622 623 uint8_t avrcp_avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 624 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 625 if (!avrcp_connection){ 626 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 627 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 628 } 629 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 630 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 631 632 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 633 // free connection 634 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 635 avrcp_connection->browsing_connection = NULL; 636 return ERROR_CODE_SUCCESS; 637 } 638 639 /** 640 * @brief Retrieve a listing of the contents of a folder. 641 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 642 * @param start_item 643 * @param end_item 644 * @param attribute_count 645 * @param attribute_list 646 **/ 647 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){ 648 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 649 if (!avrcp_connection){ 650 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 651 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 652 } 653 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 654 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 655 656 connection->get_folder_item = 1; 657 connection->scope = scope; 658 connection->start_item = start_item; 659 connection->end_item = end_item; 660 connection->attr_bitmap = attr_bitmap; 661 662 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 663 return ERROR_CODE_SUCCESS; 664 } 665 666 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){ 667 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap); 668 } 669 670 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){ 671 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 672 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap); 673 } 674 675 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 676 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 677 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap); 678 } 679 680 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){ 681 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap); 682 } 683 684 685 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 686 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 687 if (!avrcp_connection){ 688 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 689 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 690 } 691 692 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 693 if (connection->state != AVCTP_CONNECTION_OPENED){ 694 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 695 return ERROR_CODE_COMMAND_DISALLOWED; 696 } 697 698 connection->set_browsed_player_id = 1; 699 connection->browsed_player_id = browsed_player_id; 700 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 701 return ERROR_CODE_SUCCESS; 702 } 703 704 uint8_t avrcp_browsing_controller_set_addressed_player(uint16_t avrcp_browsing_cid, uint16_t addressed_player_id){ 705 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 706 if (!avrcp_connection){ 707 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 708 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 709 } 710 711 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 712 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 713 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 714 return ERROR_CODE_COMMAND_DISALLOWED; 715 } 716 717 connection->set_addressed_player_id = 1; 718 connection->addressed_player_id = addressed_player_id; 719 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 720 return ERROR_CODE_SUCCESS; 721 } 722 723 /** 724 * @brief Retrieve a listing of the contents of a folder. 725 * @param direction 0-folder up, 1-folder down 726 * @param folder_uid 8 bytes long 727 **/ 728 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 729 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 730 if (!avrcp_connection){ 731 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 732 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 733 } 734 735 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 736 737 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 738 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 739 return ERROR_CODE_COMMAND_DISALLOWED; 740 } 741 742 if (!connection->browsed_player_id){ 743 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 744 return ERROR_CODE_COMMAND_DISALLOWED; 745 } 746 printf(" send change path\n"); 747 connection->change_path = 1; 748 connection->direction = direction; 749 memset(connection->folder_uid, 0, 8); 750 if (folder_uid){ 751 memcpy(connection->folder_uid, folder_uid, 8); 752 } 753 754 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 755 return ERROR_CODE_SUCCESS; 756 } 757 758 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 759 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL); 760 } 761 762 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 763 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 764 }