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 printf("avrcp_emit_incoming_browsing_connection browsing_cid 0x%02x \n", browsing_cid); 104 if (!callback) return; 105 uint8_t event[11]; 106 int pos = 0; 107 event[pos++] = HCI_EVENT_AVRCP_META; 108 event[pos++] = sizeof(event) - 2; 109 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 110 reverse_bd_addr(addr,&event[pos]); 111 pos += 6; 112 little_endian_store_16(event, pos, browsing_cid); 113 pos += 2; 114 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 115 } 116 117 static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){ 118 if (!callback) return; 119 uint8_t event[5]; 120 int pos = 0; 121 event[pos++] = HCI_EVENT_AVRCP_META; 122 event[pos++] = sizeof(event) - 2; 123 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 124 little_endian_store_16(event, pos, browsing_cid); 125 pos += 2; 126 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 127 } 128 129 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 130 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 131 memset(connection, 0, sizeof(avrcp_browsing_connection_t)); 132 connection->state = AVCTP_CONNECTION_IDLE; 133 connection->transaction_label = 0xFF; 134 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(); 135 avrcp_connection->browsing_connection = connection; 136 return connection; 137 } 138 139 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){ 140 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context); 141 142 if (!avrcp_connection){ 143 log_error("avrcp: there is no previously established AVRCP controller connection."); 144 return ERROR_CODE_COMMAND_DISALLOWED; 145 } 146 147 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 148 if (connection){ 149 log_error(" avrcp_browsing_connect connection exists."); 150 return ERROR_CODE_SUCCESS; 151 } 152 153 connection = avrcp_browsing_create_connection(avrcp_connection); 154 if (!connection){ 155 log_error("avrcp: could not allocate connection struct."); 156 return BTSTACK_MEMORY_ALLOC_FAILED; 157 } 158 159 if (!browsing_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 160 161 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 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 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 printf("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 printf("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 // transport header 256 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 257 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 258 // Profile IDentifier (PID) 259 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 260 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 261 command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 262 263 uint32_t attribute_count = 0; 264 uint32_t attributes_to_copy = 0; 265 266 switch (connection->attr_bitmap){ 267 case AVRCP_MEDIA_ATTR_NONE: 268 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 269 break; 270 case AVRCP_MEDIA_ATTR_ALL: 271 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 272 break; 273 default: 274 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 275 attributes_to_copy = attribute_count; 276 break; 277 } 278 279 big_endian_store_16(command, pos, 10 + attribute_count); 280 pos += 2; 281 command[pos++] = connection->scope; 282 big_endian_store_32(command, pos, connection->start_item); 283 pos += 4; 284 big_endian_store_32(command, pos, connection->end_item); 285 pos += 4; 286 command[pos++] = attribute_count; 287 288 int bit_position = 1; 289 while (attributes_to_copy){ 290 if (connection->attr_bitmap & (1 << bit_position)){ 291 big_endian_store_32(command, pos, bit_position); 292 pos += 4; 293 attributes_to_copy--; 294 } 295 bit_position++; 296 } 297 298 return l2cap_send(cid, command, pos); 299 } 300 301 static int avrcp_browsing_controller_send_change_path_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_CHANGE_PATH; 311 312 big_endian_store_16(command, pos, 11); 313 pos += 2; 314 big_endian_store_16(command, pos, connection->browsed_player_uid_counter); 315 pos += 2; 316 command[pos++] = connection->direction; 317 memcpy(command+pos, connection->folder_uid, 8); 318 pos += 8; 319 return l2cap_send(cid, command, pos); 320 } 321 322 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 323 uint8_t command[100]; 324 int pos = 0; 325 // transport header 326 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 327 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 328 // Profile IDentifier (PID) 329 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 330 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 331 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 332 333 big_endian_store_16(command, pos, 2); 334 pos += 2; 335 big_endian_store_16(command, pos, connection->browsed_player_id); 336 pos += 2; 337 return l2cap_send(cid, command, pos); 338 } 339 340 static int avrcp_browsing_controller_send_set_addressed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 341 uint8_t command[100]; 342 int pos = 0; 343 // transport header 344 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 345 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 346 // Profile IDentifier (PID) 347 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 348 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 349 command[pos++] = AVRCP_PDU_ID_SET_ADDRESSED_PLAYER; 350 351 big_endian_store_16(command, pos, 2); 352 pos += 2; 353 big_endian_store_16(command, pos, connection->addressed_player_id); 354 pos += 2; 355 return l2cap_send(cid, command, pos); 356 } 357 358 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 359 switch (connection->state){ 360 case AVCTP_CONNECTION_OPENED: 361 if (connection->get_folder_item){ 362 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 363 connection->get_folder_item = 0; 364 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 365 break; 366 } 367 if (connection->change_path){ 368 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 369 connection->change_path = 0; 370 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 371 break; 372 } 373 374 if (connection->set_browsed_player_id){ 375 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 376 connection->set_browsed_player_id = 0; 377 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 378 break; 379 } 380 381 if (connection->set_addressed_player_id){ 382 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 383 connection->set_addressed_player_id = 0; 384 avrcp_browsing_controller_send_set_addressed_player_cmd(connection->l2cap_browsing_cid, connection); 385 break; 386 } 387 default: 388 return; 389 } 390 } 391 392 static void avrcp_browsing_controller_emit_done(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 393 if (!callback) return; 394 uint8_t event[6]; 395 int pos = 0; 396 event[pos++] = HCI_EVENT_AVRCP_META; 397 event[pos++] = sizeof(event) - 2; 398 event[pos++] = AVRCP_SUBEVENT_BROWSING_MEDIA_ITEM_DONE; 399 little_endian_store_16(event, pos, browsing_cid); 400 pos += 2; 401 event[pos++] = browsing_status; 402 event[pos++] = bluetooth_status; 403 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 404 } 405 406 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 407 avrcp_browsing_connection_t * browsing_connection; 408 409 switch (packet_type) { 410 case L2CAP_DATA_PACKET:{ 411 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 412 if (!browsing_connection) break; 413 browsing_connection->state = AVCTP_CONNECTION_OPENED; 414 415 int pos = 3; 416 if (size < pos + 4){ 417 avrcp_browsing_controller_emit_done(avrcp_controller_context.avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 418 break; 419 } 420 421 avrcp_pdu_id_t pdu_id = packet[pos++]; 422 uint16_t length = big_endian_read_16(packet, pos); 423 pos += 2; 424 if (size + pos < length){ 425 avrcp_browsing_controller_emit_done(avrcp_controller_context.avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 426 break; 427 } 428 429 uint8_t browsing_status = packet[pos++]; 430 if (browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 431 avrcp_browsing_controller_emit_done(avrcp_controller_context.avrcp_callback, channel, browsing_status, ERROR_CODE_SUCCESS); 432 break; 433 } 434 435 uint32_t i; 436 switch(pdu_id){ 437 case AVRCP_PDU_ID_CHANGE_PATH: 438 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 439 break; 440 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 441 browsing_connection->browsed_player_uid_counter = big_endian_read_16(packet, pos); 442 pos += 2; 443 uint32_t num_items = big_endian_read_32(packet, pos); 444 pos += 4; 445 446 for (i = 0; i < num_items; i++){ 447 uint16_t browsable_item_length = 5 + big_endian_read_16(packet, pos+3); 448 // reuse byte to put the new type AVRCP_BROWSING_MEDIA_ROOT_FOLDER 449 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 450 (*avrcp_controller_context.avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos, browsable_item_length+1); 451 pos += browsable_item_length; 452 } 453 break; 454 } 455 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 456 // uint16_t uid_counter = big_endian_read_16(packet, pos); 457 pos += 2; 458 uint16_t num_items = big_endian_read_16(packet, pos); 459 pos += 2; 460 461 for (i = 0; i < num_items; i++){ 462 uint16_t browsable_item_length = 3 + big_endian_read_16(packet, pos+1); 463 (*avrcp_controller_context.avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos, browsable_item_length); 464 pos += browsable_item_length; 465 } 466 break; 467 } 468 default: 469 return; 470 } 471 avrcp_browsing_controller_emit_done(avrcp_controller_context.avrcp_callback, channel, browsing_status, ERROR_CODE_SUCCESS); 472 break; 473 } 474 case HCI_EVENT_PACKET: 475 switch (hci_event_packet_get_type(packet)){ 476 case L2CAP_EVENT_CAN_SEND_NOW: 477 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 478 if (!browsing_connection) break; 479 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 480 break; 481 default: 482 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 483 break; 484 } 485 default: 486 break; 487 } 488 } 489 490 void avrcp_browsing_controller_init(void){ 491 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 492 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0); 493 } 494 495 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 496 if (callback == NULL){ 497 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 498 return; 499 } 500 avrcp_controller_context.browsing_avrcp_callback = callback; 501 } 502 503 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){ 504 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 505 } 506 507 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 508 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 509 if (!avrcp_connection){ 510 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 511 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 512 } 513 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 514 515 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 516 return ERROR_CODE_SUCCESS; 517 } 518 519 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){ 520 printf("avrcp_avrcp_browsing_configure_incoming_connection browsing cid 0x%02X\n", avrcp_browsing_cid); 521 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 522 if (!avrcp_connection){ 523 printf("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection.\n"); 524 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 525 } 526 if (!avrcp_connection->browsing_connection){ 527 printf("avrcp_avrcp_browsing_decline_incoming_connection: no browsing connection.\n"); 528 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 529 } 530 531 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 532 printf("avrcp_avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state.\n"); 533 return ERROR_CODE_COMMAND_DISALLOWED; 534 } 535 536 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 537 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 538 avrcp_connection->browsing_connection->ertm_buffer_size = size; 539 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 540 printf("accept ertm connection\n"); 541 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); 542 return ERROR_CODE_SUCCESS; 543 } 544 545 uint8_t avrcp_avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 546 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 547 if (!avrcp_connection){ 548 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 549 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 550 } 551 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 552 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 553 554 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 555 // free connection 556 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 557 avrcp_connection->browsing_connection = NULL; 558 return ERROR_CODE_SUCCESS; 559 } 560 561 /** 562 * @brief Retrieve a listing of the contents of a folder. 563 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 564 * @param start_item 565 * @param end_item 566 * @param attribute_count 567 * @param attribute_list 568 **/ 569 static uint8_t avrcp_browsing_controller_get_folder_items(uint16_t avrcp_browsing_cid, uint8_t scope, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 570 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 571 if (!avrcp_connection){ 572 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 573 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 574 } 575 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 576 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 577 578 connection->get_folder_item = 1; 579 connection->scope = scope; 580 connection->start_item = start_item; 581 connection->end_item = end_item; 582 connection->attr_bitmap = attr_bitmap; 583 584 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 585 return ERROR_CODE_SUCCESS; 586 } 587 588 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){ 589 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 0, start_item, end_item, attr_bitmap); 590 } 591 592 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){ 593 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 594 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, start_item, end_item, attr_bitmap); 595 } 596 597 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 598 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 599 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, start_item, end_item, attr_bitmap); 600 } 601 602 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){ 603 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 3, start_item, end_item, attr_bitmap); 604 } 605 606 607 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 608 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 609 if (!avrcp_connection){ 610 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 611 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 612 } 613 614 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 615 if (connection->state != AVCTP_CONNECTION_OPENED){ 616 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 617 return ERROR_CODE_COMMAND_DISALLOWED; 618 } 619 620 connection->set_browsed_player_id = 1; 621 connection->browsed_player_id = browsed_player_id; 622 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 623 return ERROR_CODE_SUCCESS; 624 } 625 626 uint8_t avrcp_browsing_controller_set_addressed_player(uint16_t avrcp_browsing_cid, uint16_t addressed_player_id){ 627 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 628 if (!avrcp_connection){ 629 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 630 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 631 } 632 633 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 634 if (connection->state != AVCTP_CONNECTION_OPENED){ 635 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 636 return ERROR_CODE_COMMAND_DISALLOWED; 637 } 638 639 connection->set_addressed_player_id = 1; 640 connection->addressed_player_id = addressed_player_id; 641 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 642 return ERROR_CODE_SUCCESS; 643 } 644 645 /** 646 * @brief Retrieve a listing of the contents of a folder. 647 * @param direction 0-folder up, 1-folder down 648 * @param folder_uid 8 bytes long 649 **/ 650 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 651 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 652 if (!avrcp_connection){ 653 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 654 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 655 } 656 657 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 658 if (connection->state != AVCTP_CONNECTION_OPENED){ 659 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 660 return ERROR_CODE_COMMAND_DISALLOWED; 661 } 662 663 if (!connection->browsed_player_id){ 664 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 665 return ERROR_CODE_COMMAND_DISALLOWED; 666 } 667 668 connection->change_path = 1; 669 connection->direction = direction; 670 memcpy(connection->folder_uid, folder_uid, 8); 671 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 672 return ERROR_CODE_SUCCESS; 673 } 674 675 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 676 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, 0); 677 } 678 679 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 680 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 681 } 682