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 } 386 387 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[7]; 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 // printf_hexdump(packet, size); 416 int pos = 0; 417 uint8_t transport_header = packet[pos++]; 418 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 419 // uint8_t transaction_label = transport_header >> 4; 420 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 421 // uint8_t frame_type = (transport_header & 0x03) >> 1; 422 // uint8_t ipid = transport_header & 0x01; 423 pos += 2; 424 browsing_connection->num_packets = 1; 425 switch (avctp_packet_type){ 426 case AVRCP_SINGLE_PACKET: 427 break; 428 case AVRCP_START_PACKET: 429 browsing_connection->num_packets = packet[pos++]; 430 break; 431 case AVRCP_CONTINUE_PACKET: 432 case AVRCP_END_PACKET: 433 // browsing_connection->num_packets = packet[pos++]; 434 break; 435 } 436 437 if (pos + 4 > size){ 438 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 439 return; 440 } 441 442 avrcp_pdu_id_t pdu_id = packet[pos++]; 443 uint16_t length = big_endian_read_16(packet, pos); 444 pos += 2; 445 UNUSED(length); 446 // if (browsing_connection->num_packets > 1) 447 // if (browsing_connection->num_packets == 1 && (pos + length > size)){ 448 // printf("pos + length > size, %d, %d, %d \n", pos, length, size); 449 // avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 450 // return; 451 // } 452 453 uint8_t browsing_status = packet[pos++]; 454 if (browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 455 printf("browsing_status %d\n", browsing_status); 456 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_status, ERROR_CODE_SUCCESS); 457 return; 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_CHANGE_PATH \n"); 467 break; 468 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 469 browsing_connection->browsed_player_uid_counter = big_endian_read_16(packet, pos); 470 pos += 2; 471 uint32_t num_items = big_endian_read_32(packet, pos); 472 pos += 4; 473 printf("AVRCP_PDU_ID_SET_BROWSED_PLAYER uuid counter 0x0%2x, num items %d\n", browsing_connection->browsed_player_uid_counter, num_items); 474 475 for (i = 0; i < num_items; i++){ 476 uint16_t browsable_item_length = 5 + big_endian_read_16(packet, pos+3); 477 printf(" pos %d, len %d\n", pos, browsable_item_length); 478 // reuse byte to put the new type AVRCP_BROWSING_MEDIA_ROOT_FOLDER 479 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 480 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos, browsable_item_length+1); 481 pos += browsable_item_length; 482 } 483 break; 484 } 485 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 486 // uint16_t uid_counter = big_endian_read_16(packet, pos); 487 pos += 2; 488 uint16_t num_items = big_endian_read_16(packet, pos); 489 pos += 2; 490 for (i = 0; i < num_items; i++){ 491 uint16_t browsable_item_length = 3 + big_endian_read_16(packet, pos+1); 492 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos, browsable_item_length); 493 pos += browsable_item_length; 494 } 495 break; 496 } 497 default: 498 break; 499 } 500 switch (avctp_packet_type){ 501 case AVRCP_SINGLE_PACKET: 502 case AVRCP_END_PACKET: 503 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_status, ERROR_CODE_SUCCESS); 504 break; 505 default: 506 break; 507 } 508 break; 509 } 510 case HCI_EVENT_PACKET: 511 switch (hci_event_packet_get_type(packet)){ 512 case L2CAP_EVENT_CAN_SEND_NOW: 513 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 514 if (!browsing_connection) break; 515 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 516 break; 517 default: 518 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 519 break; 520 } 521 default: 522 break; 523 } 524 } 525 526 void avrcp_browsing_controller_init(void){ 527 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 528 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0); 529 } 530 531 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 532 if (callback == NULL){ 533 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 534 return; 535 } 536 avrcp_controller_context.browsing_avrcp_callback = callback; 537 } 538 539 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){ 540 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 541 } 542 543 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 544 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 545 if (!avrcp_connection){ 546 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 547 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 548 } 549 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 550 551 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 552 return ERROR_CODE_SUCCESS; 553 } 554 555 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){ 556 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 557 if (!avrcp_connection){ 558 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 559 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 560 } 561 if (!avrcp_connection->browsing_connection){ 562 log_error("avrcp_avrcp_browsing_decline_incoming_connection: no browsing connection."); 563 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 564 } 565 566 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 567 log_error("avrcp_avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state."); 568 return ERROR_CODE_COMMAND_DISALLOWED; 569 } 570 571 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 572 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 573 avrcp_connection->browsing_connection->ertm_buffer_size = size; 574 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 575 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); 576 return ERROR_CODE_SUCCESS; 577 } 578 579 uint8_t avrcp_avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 580 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 581 if (!avrcp_connection){ 582 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 583 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 584 } 585 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 586 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 587 588 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 589 // free connection 590 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 591 avrcp_connection->browsing_connection = NULL; 592 return ERROR_CODE_SUCCESS; 593 } 594 595 /** 596 * @brief Retrieve a listing of the contents of a folder. 597 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 598 * @param start_item 599 * @param end_item 600 * @param attribute_count 601 * @param attribute_list 602 **/ 603 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){ 604 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 605 if (!avrcp_connection){ 606 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 607 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 608 } 609 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 610 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 611 612 connection->get_folder_item = 1; 613 connection->scope = scope; 614 connection->start_item = start_item; 615 connection->end_item = end_item; 616 connection->attr_bitmap = attr_bitmap; 617 618 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 619 return ERROR_CODE_SUCCESS; 620 } 621 622 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){ 623 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 0, start_item, end_item, attr_bitmap); 624 } 625 626 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){ 627 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 628 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, start_item, end_item, attr_bitmap); 629 } 630 631 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 632 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 633 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, start_item, end_item, attr_bitmap); 634 } 635 636 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){ 637 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 3, start_item, end_item, attr_bitmap); 638 } 639 640 641 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 642 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 643 if (!avrcp_connection){ 644 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 645 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 646 } 647 648 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 649 if (connection->state != AVCTP_CONNECTION_OPENED){ 650 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 651 return ERROR_CODE_COMMAND_DISALLOWED; 652 } 653 654 connection->set_browsed_player_id = 1; 655 connection->browsed_player_id = browsed_player_id; 656 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 657 return ERROR_CODE_SUCCESS; 658 } 659 660 uint8_t avrcp_browsing_controller_set_addressed_player(uint16_t avrcp_browsing_cid, uint16_t addressed_player_id){ 661 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 662 if (!avrcp_connection){ 663 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 664 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 665 } 666 667 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 668 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 669 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 670 return ERROR_CODE_COMMAND_DISALLOWED; 671 } 672 673 connection->set_addressed_player_id = 1; 674 connection->addressed_player_id = addressed_player_id; 675 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 676 return ERROR_CODE_SUCCESS; 677 } 678 679 /** 680 * @brief Retrieve a listing of the contents of a folder. 681 * @param direction 0-folder up, 1-folder down 682 * @param folder_uid 8 bytes long 683 **/ 684 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 685 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 686 if (!avrcp_connection){ 687 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 688 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 689 } 690 691 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 692 693 if (!connection || connection->state != AVCTP_CONNECTION_OPENED || !folder_uid){ 694 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 695 return ERROR_CODE_COMMAND_DISALLOWED; 696 } 697 698 if (!connection->browsed_player_id){ 699 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 700 return ERROR_CODE_COMMAND_DISALLOWED; 701 } 702 703 connection->change_path = 1; 704 connection->direction = direction; 705 706 memcpy(connection->folder_uid, folder_uid, 8); 707 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 708 return ERROR_CODE_SUCCESS; 709 } 710 711 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 712 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, 0); 713 } 714 715 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 716 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 717 } 718