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__ "avdtp.c" 39 40 41 #include <stdint.h> 42 #include <string.h> 43 44 #include "bluetooth_psm.h" 45 #include "bluetooth_sdp.h" 46 #include "btstack_debug.h" 47 #include "btstack_event.h" 48 #include "btstack_memory.h" 49 #include "classic/avdtp.h" 50 #include "classic/avdtp_acceptor.h" 51 #include "classic/avdtp_initiator.h" 52 #include "classic/avdtp_util.h" 53 #include "classic/sdp_client.h" 54 #include "classic/sdp_util.h" 55 56 btstack_linked_list_t stream_endpoints; 57 58 static bool l2cap_registered; 59 60 static btstack_packet_handler_t avdtp_source_callback; 61 static btstack_packet_handler_t avdtp_sink_callback; 62 static btstack_context_callback_registration_t avdtp_handle_sdp_client_query_request; 63 64 static uint16_t sdp_query_context_avdtp_cid = 0; 65 66 static uint16_t stream_endpoints_id_counter = 0; 67 68 static btstack_linked_list_t connections; 69 static uint16_t transaction_id_counter = 0; 70 71 static int record_id; 72 static uint8_t attribute_value[45]; 73 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 74 75 static void (*avdtp_sink_handle_media_data)(uint8_t local_seid, uint8_t *packet, uint16_t size); 76 77 static uint16_t avdtp_cid_counter = 0; 78 79 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 80 81 btstack_packet_handler_t 82 avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint) { 83 return (stream_endpoint->sep.type == AVDTP_SOURCE) ? avdtp_source_callback : avdtp_sink_callback; 84 } 85 86 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size){ 87 if (avdtp_source_callback != NULL){ 88 (*avdtp_source_callback)(HCI_EVENT_PACKET, 0, packet, size); 89 } 90 if (avdtp_sink_callback != NULL){ 91 (*avdtp_sink_callback)(HCI_EVENT_PACKET, 0, packet, size); 92 } 93 } 94 95 void avdtp_emit_source(uint8_t * packet, uint16_t size){ 96 if (avdtp_source_callback != NULL){ 97 (*avdtp_source_callback)(HCI_EVENT_PACKET, 0, packet, size); 98 } 99 } 100 101 btstack_linked_list_t * avdtp_get_stream_endpoints(void){ 102 return &stream_endpoints; 103 } 104 105 btstack_linked_list_t * avdtp_get_connections(void){ 106 return &connections; 107 } 108 109 static avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr){ 110 btstack_linked_list_iterator_t it; 111 btstack_linked_list_iterator_init(&it, &connections); 112 while (btstack_linked_list_iterator_has_next(&it)){ 113 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 114 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 115 return connection; 116 } 117 return NULL; 118 } 119 120 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid){ 121 btstack_linked_list_iterator_t it; 122 btstack_linked_list_iterator_init(&it, &connections); 123 while (btstack_linked_list_iterator_has_next(&it)){ 124 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 125 if (connection->avdtp_cid != avdtp_cid) continue; 126 return connection; 127 } 128 return NULL; 129 } 130 131 132 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid){ 133 btstack_linked_list_iterator_t it; 134 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 135 while (btstack_linked_list_iterator_has_next(&it)){ 136 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 137 if (stream_endpoint->sep.seid == seid){ 138 return stream_endpoint; 139 } 140 } 141 return NULL; 142 } 143 144 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type){ 145 btstack_linked_list_iterator_t it; 146 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 147 while (btstack_linked_list_iterator_has_next(&it)){ 148 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 149 if (stream_endpoint->sep.type != AVDTP_SOURCE) continue; 150 if (stream_endpoint->sep.capabilities.media_codec.media_codec_type != codec_type) continue; 151 return stream_endpoint; 152 } 153 return NULL; 154 } 155 156 157 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid){ 158 btstack_linked_list_iterator_t it; 159 btstack_linked_list_iterator_init(&it, &connections); 160 while (btstack_linked_list_iterator_has_next(&it)){ 161 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 162 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 163 return connection; 164 } 165 return NULL; 166 } 167 168 static avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid){ 169 btstack_linked_list_iterator_t it; 170 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 171 while (btstack_linked_list_iterator_has_next(&it)){ 172 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 173 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 174 return stream_endpoint; 175 } 176 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 177 return stream_endpoint; 178 } 179 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 180 return stream_endpoint; 181 } 182 } 183 return NULL; 184 } 185 186 static avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_signaling_cid(uint16_t l2cap_cid){ 187 btstack_linked_list_iterator_t it; 188 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 189 while (btstack_linked_list_iterator_has_next(&it)){ 190 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 191 if (stream_endpoint->connection){ 192 if (stream_endpoint->connection->l2cap_signaling_cid == l2cap_cid){ 193 return stream_endpoint; 194 } 195 } 196 } 197 return NULL; 198 } 199 200 uint16_t avdtp_get_next_transaction_label(void){ 201 transaction_id_counter++; 202 if (transaction_id_counter == 16){ 203 transaction_id_counter = 1; 204 } 205 return transaction_id_counter; 206 } 207 208 static avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, uint16_t cid){ 209 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 210 if (!connection){ 211 log_error("Not enough memory to create connection"); 212 return NULL; 213 } 214 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 215 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 216 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 217 connection->a2dp_source_discover_seps = false; 218 connection->avdtp_cid = cid; 219 (void)memcpy(connection->remote_addr, remote_addr, 6); 220 221 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 222 return connection; 223 } 224 225 static uint16_t avdtp_get_next_cid(void){ 226 if (avdtp_cid_counter == 0xffff) { 227 avdtp_cid_counter = 1; 228 } else { 229 avdtp_cid_counter++; 230 } 231 return avdtp_cid_counter; 232 } 233 234 static uint16_t avdtp_get_next_local_seid(void){ 235 if (stream_endpoints_id_counter == 0xffff) { 236 stream_endpoints_id_counter = 1; 237 } else { 238 stream_endpoints_id_counter++; 239 } 240 return stream_endpoints_id_counter; 241 } 242 243 static void avdtp_handle_start_sdp_client_query(void * context){ 244 UNUSED(context); 245 246 btstack_linked_list_iterator_t it; 247 btstack_linked_list_iterator_init(&it, &connections); 248 while (btstack_linked_list_iterator_has_next(&it)){ 249 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 250 251 switch (connection->state){ 252 case AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE: 253 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE; 254 break; 255 case AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK: 256 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE; 257 break; 258 case AVDTP_SIGNALING_CONNECTION_OPENED: 259 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES) continue; 260 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES; 261 break; 262 default: 263 continue; 264 } 265 sdp_query_context_avdtp_cid = connection->avdtp_cid; 266 record_id = -1; 267 sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVDTP); 268 return; 269 } 270 } 271 272 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid){ 273 avdtp_connection_t * connection = avdtp_get_connection_for_bd_addr(remote); 274 if (connection){ 275 return ERROR_CODE_COMMAND_DISALLOWED; 276 } 277 278 uint16_t cid = avdtp_get_next_cid(); 279 if (avdtp_cid != NULL) { 280 *avdtp_cid = cid; 281 } 282 283 connection = avdtp_create_connection(remote, cid); 284 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 285 286 connection->avdtp_cid = cid; 287 288 connection->avdtp_l2cap_psm = 0; 289 connection->avdtp_version = 0; 290 connection->sink_supported = false; 291 connection->source_supported = false; 292 293 switch (role){ 294 case AVDTP_ROLE_SOURCE: 295 connection->state = AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK; 296 break; 297 case AVDTP_ROLE_SINK: 298 connection->state = AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE; 299 break; 300 default: 301 btstack_assert(false); 302 return ERROR_CODE_COMMAND_DISALLOWED; 303 } 304 305 avdtp_handle_sdp_client_query_request.callback = &avdtp_handle_start_sdp_client_query; 306 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 307 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 308 return ERROR_CODE_SUCCESS; 309 } 310 311 312 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback){ 313 btstack_assert(callback != NULL); 314 avdtp_sink_callback = callback; 315 } 316 317 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback){ 318 btstack_assert(callback != NULL); 319 avdtp_source_callback = callback; 320 } 321 322 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 323 if (!stream_endpoint){ 324 log_error("Stream endpoint with given seid is not registered."); 325 return; 326 } 327 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 328 stream_endpoint->sep.registered_service_categories = bitmap; 329 } 330 331 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 332 if (!stream_endpoint){ 333 log_error("Stream endpoint with given seid is not registered."); 334 return; 335 } 336 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 337 stream_endpoint->sep.registered_service_categories = bitmap; 338 } 339 340 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 341 if (!stream_endpoint){ 342 log_error("Stream endpoint with given seid is not registered."); 343 return; 344 } 345 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 346 stream_endpoint->sep.registered_service_categories = bitmap; 347 } 348 349 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 350 if (!stream_endpoint){ 351 log_error("Stream endpoint with given seid is not registered."); 352 return; 353 } 354 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 355 stream_endpoint->sep.registered_service_categories = bitmap; 356 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 357 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 358 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 359 } 360 361 void avdtp_register_content_protection_category(avdtp_stream_endpoint_t * stream_endpoint, uint16_t cp_type, const uint8_t * cp_type_value, uint8_t cp_type_value_len){ 362 if (!stream_endpoint){ 363 log_error("Stream endpoint with given seid is not registered."); 364 return; 365 } 366 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 367 stream_endpoint->sep.registered_service_categories = bitmap; 368 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 369 (void)memcpy(stream_endpoint->sep.capabilities.content_protection.cp_type_value, 370 cp_type_value, 371 btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN)); 372 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN); 373 } 374 375 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 376 if (!stream_endpoint){ 377 log_error("Stream endpoint with given seid is not registered."); 378 return; 379 } 380 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 381 stream_endpoint->sep.registered_service_categories = bitmap; 382 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 383 stream_endpoint->sep.capabilities.header_compression.media = media; 384 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 385 } 386 387 void avdtp_register_media_codec_category(avdtp_stream_endpoint_t * stream_endpoint, avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, uint8_t * media_codec_info, uint16_t media_codec_info_len){ 388 if (!stream_endpoint){ 389 log_error("Stream endpoint with given seid is not registered."); 390 return; 391 } 392 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 393 stream_endpoint->sep.registered_service_categories = bitmap; 394 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 395 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 396 stream_endpoint->sep.capabilities.media_codec.media_codec_information = media_codec_info; 397 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 398 } 399 400 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 401 if (!stream_endpoint){ 402 log_error("Stream endpoint with given seid is not registered."); 403 return; 404 } 405 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 406 stream_endpoint->sep.registered_service_categories = bitmap; 407 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 408 } 409 410 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 411 avdtp_sink_handle_media_data = callback; 412 } 413 414 /* START: tracking can send now requests per l2cap cid */ 415 static void avdtp_handle_can_send_now(uint16_t l2cap_cid) { 416 417 log_debug("avdtp_packet_handler, L2CAP_EVENT_CAN_SEND_NOW l2cap_cid 0x%02x", l2cap_cid); 418 419 // get signaling connection for l2cap cid 420 avdtp_connection_t * connection = avdtp_get_connection_for_l2cap_signaling_cid(l2cap_cid); 421 422 if (connection != NULL) { 423 if (connection->wait_to_send_acceptor) { 424 log_debug("call avdtp_acceptor_stream_config_subsm_run %p", connection); 425 connection->wait_to_send_acceptor = false; 426 avdtp_acceptor_stream_config_subsm_run(connection); 427 } else if (connection->wait_to_send_initiator) { 428 log_debug("call avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling %p", connection); 429 connection->wait_to_send_initiator = false; 430 avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling(connection); 431 } 432 bool more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator; 433 if (more_to_send){ 434 l2cap_request_can_send_now_event(l2cap_cid); 435 } 436 return; 437 } 438 439 // get stream endpoint connection for l2cap cid 440 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(l2cap_cid); 441 if (stream_endpoint != NULL) { 442 log_debug("call avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint %p", stream_endpoint); 443 if (stream_endpoint->request_can_send_now) { 444 stream_endpoint->request_can_send_now = 0; 445 avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint(stream_endpoint); 446 } 447 bool more_to_send = stream_endpoint->request_can_send_now != 0; 448 if (more_to_send){ 449 l2cap_request_can_send_now_event(l2cap_cid); 450 } 451 } 452 } 453 /* END: tracking can send now requests per l2cap cid */ 454 455 456 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){ 457 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 458 if (!stream_endpoint){ 459 log_error("Not enough memory to create stream endpoint"); 460 return NULL; 461 } 462 stream_endpoint->sep.seid = avdtp_get_next_local_seid(); 463 stream_endpoint->sep.media_type = media_type; 464 stream_endpoint->sep.type = sep_type; 465 btstack_linked_list_add(avdtp_get_stream_endpoints(), (btstack_linked_item_t *) stream_endpoint); 466 return stream_endpoint; 467 } 468 469 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 470 btstack_linked_list_remove(avdtp_get_stream_endpoints(), (btstack_linked_item_t* ) stream_endpoint); 471 btstack_memory_avdtp_stream_endpoint_free(stream_endpoint); 472 } 473 474 static void 475 handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t *connection, uint8_t *packet, uint16_t size) { 476 if (size < 2) return; 477 478 uint16_t offset; 479 avdtp_message_type_t message_type = avdtp_get_signaling_packet_type(packet); 480 switch (message_type){ 481 case AVDTP_CMD_MSG: 482 offset = avdtp_read_signaling_header(&connection->acceptor_signaling_packet, packet, size); 483 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset); 484 break; 485 default: 486 offset = avdtp_read_signaling_header(&connection->initiator_signaling_packet, packet, size); 487 avdtp_initiator_stream_config_subsm(connection, packet, size, offset); 488 break; 489 } 490 } 491 492 static void avdtp_handle_sdp_client_query_attribute_value(avdtp_connection_t * connection, uint8_t *packet){ 493 des_iterator_t des_list_it; 494 des_iterator_t prot_it; 495 496 // Handle new SDP record 497 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 498 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 499 // log_info("SDP Record: Nr: %d", record_id); 500 } 501 502 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 503 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 504 505 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 506 507 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 508 509 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 510 if (de_get_element_type(attribute_value) != DE_DES) break; 511 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 512 uint8_t * element = des_iterator_get_element(&des_list_it); 513 if (de_get_element_type(element) != DE_UUID) continue; 514 uint32_t uuid = de_get_uuid32(element); 515 switch (uuid){ 516 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 517 connection->source_supported = true; 518 log_info("source_supported"); 519 break; 520 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 521 connection->sink_supported = true; 522 log_info("sink_supported"); 523 break; 524 default: 525 break; 526 } 527 } 528 break; 529 530 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 531 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 532 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 533 uint8_t *des_element; 534 uint8_t *element; 535 uint32_t uuid; 536 537 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 538 539 des_element = des_iterator_get_element(&des_list_it); 540 des_iterator_init(&prot_it, des_element); 541 element = des_iterator_get_element(&prot_it); 542 543 if (de_get_element_type(element) != DE_UUID) continue; 544 545 uuid = de_get_uuid32(element); 546 des_iterator_next(&prot_it); 547 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 548 switch (uuid){ 549 case BLUETOOTH_PROTOCOL_L2CAP: 550 if (!des_iterator_has_more(&prot_it)) continue; 551 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->avdtp_l2cap_psm); 552 break; 553 case BLUETOOTH_PROTOCOL_AVDTP: 554 if (!des_iterator_has_more(&prot_it)) continue; 555 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->avdtp_version); 556 log_info("avdtp version 0x%02x", connection->avdtp_version); 557 break; 558 default: 559 break; 560 } 561 } 562 break; 563 564 default: 565 break; 566 } 567 } 568 } else { 569 log_error("SDP attribute value buffer size exceeded: available %d, required %d", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 570 } 571 572 } 573 574 static void avdtp_finalize_connection(avdtp_connection_t * connection){ 575 btstack_run_loop_remove_timer(&connection->retry_timer); 576 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 577 btstack_memory_avdtp_connection_free(connection); 578 } 579 580 static void avdtp_handle_sdp_query_failed(avdtp_connection_t * connection, uint8_t status){ 581 switch (connection->state){ 582 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE: 583 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE: 584 avdtp_signaling_emit_connection_established(connection->avdtp_cid, connection->remote_addr, connection->con_handle, status); 585 break; 586 587 case AVDTP_SIGNALING_CONNECTION_OPENED: 588 // SDP query failed: try query that must be supported 589 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 590 avdtp_request_can_send_now_initiator(connection); 591 return; 592 593 default: 594 btstack_assert(false); 595 break; 596 } 597 avdtp_finalize_connection(connection); 598 sdp_query_context_avdtp_cid = 0; 599 log_info("SDP query failed with status 0x%02x.", status); 600 } 601 602 static void avdtp_handle_sdp_query_succeeded(avdtp_connection_t * connection){ 603 log_info("avdtp_handle_sdp_query_succeeded: state %d", connection->state); 604 605 switch (connection->state){ 606 case AVDTP_SIGNALING_CONNECTION_OPENED: 607 if (connection->avdtp_version < 0x0103){ 608 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 609 } else { 610 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 611 } 612 avdtp_request_can_send_now_initiator(connection); 613 break; 614 default: 615 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 616 l2cap_create_channel(avdtp_packet_handler, connection->remote_addr, connection->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 617 break; 618 } 619 } 620 621 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 622 UNUSED(packet_type); 623 UNUSED(channel); 624 UNUSED(size); 625 626 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(sdp_query_context_avdtp_cid); 627 if (!connection) { 628 log_error("SDP query, connection with 0x%02x cid not found", sdp_query_context_avdtp_cid); 629 return; 630 } 631 632 uint8_t status = ERROR_CODE_SUCCESS; 633 switch (connection->state){ 634 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE: 635 switch (hci_event_packet_get_type(packet)){ 636 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 637 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 638 return; 639 case SDP_EVENT_QUERY_COMPLETE: 640 status = sdp_event_query_complete_get_status(packet); 641 if (status != ERROR_CODE_SUCCESS) break; 642 if (!connection->sink_supported || (connection->avdtp_l2cap_psm == 0)) { 643 status = SDP_SERVICE_NOT_FOUND; 644 break; 645 } 646 break; 647 default: 648 btstack_assert(false); 649 return; 650 } 651 break; 652 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE: 653 switch (hci_event_packet_get_type(packet)){ 654 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 655 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 656 return; 657 case SDP_EVENT_QUERY_COMPLETE: 658 status = sdp_event_query_complete_get_status(packet); 659 if (status != ERROR_CODE_SUCCESS) break; 660 if (!connection->source_supported || (connection->avdtp_l2cap_psm == 0)) { 661 status = SDP_SERVICE_NOT_FOUND; 662 break; 663 } 664 break; 665 default: 666 btstack_assert(false); 667 return; 668 } 669 break; 670 671 case AVDTP_SIGNALING_CONNECTION_OPENED: 672 switch (hci_event_packet_get_type(packet)){ 673 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 674 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 675 return; 676 case SDP_EVENT_QUERY_COMPLETE: 677 // without suitable SDP Record, avdtp version v0.0 is assumed 678 status = sdp_event_query_complete_get_status(packet); 679 break; 680 default: 681 btstack_assert(false); 682 return; 683 } 684 break; 685 686 default: 687 // bail out, we must have had an incoming connection in the meantime; just trigger next sdp query on complete 688 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 689 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 690 } 691 return; 692 } 693 694 if (status == ERROR_CODE_SUCCESS){ 695 avdtp_handle_sdp_query_succeeded(connection); 696 } else { 697 avdtp_handle_sdp_query_failed(connection, status); 698 } 699 700 // register the SDP Query request to check if there is another connection waiting for the query 701 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 702 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 703 } 704 705 static avdtp_connection_t * avdtp_handle_incoming_connection(avdtp_connection_t * connection, bd_addr_t event_addr, hci_con_handle_t con_handle, uint16_t local_cid){ 706 if (connection == NULL){ 707 uint16_t cid = avdtp_get_next_cid(); 708 connection = avdtp_create_connection(event_addr, cid); 709 } 710 711 if (connection) { 712 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 713 connection->l2cap_signaling_cid = local_cid; 714 connection->con_handle = con_handle; 715 btstack_run_loop_remove_timer(&connection->retry_timer); 716 } 717 return connection; 718 } 719 720 static void avdtp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 721 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 722 723 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 724 if (connection == NULL) return; 725 726 if (connection->state == AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY){ 727 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 728 l2cap_create_channel(&avdtp_packet_handler, connection->remote_addr, connection->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 729 } 730 } 731 732 static void avdtp_retry_timer_start(avdtp_connection_t * connection){ 733 btstack_run_loop_set_timer_handler(&connection->retry_timer, avdtp_retry_timer_timeout_handler); 734 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avdtp_cid); 735 736 // add some jitter/randomness to reconnect delay 737 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 738 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 739 btstack_run_loop_add_timer(&connection->retry_timer); 740 } 741 742 743 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 744 bd_addr_t event_addr; 745 uint16_t psm; 746 uint16_t local_cid; 747 uint8_t status; 748 uint16_t l2cap_mtu; 749 hci_con_handle_t con_handle; 750 751 bool accept_streaming_connection; 752 bool outoing_signaling_active; 753 bool decline_connection; 754 755 avdtp_stream_endpoint_t * stream_endpoint = NULL; 756 avdtp_connection_t * connection = NULL; 757 758 switch (packet_type) { 759 case L2CAP_DATA_PACKET: 760 connection = avdtp_get_connection_for_l2cap_signaling_cid(channel); 761 if (connection){ 762 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 763 break; 764 } 765 766 stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(channel); 767 if (!stream_endpoint){ 768 if (!connection) break; 769 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 770 break; 771 } 772 773 if (stream_endpoint->connection){ 774 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 775 handle_l2cap_data_packet_for_signaling_connection(stream_endpoint->connection, packet, size); 776 break; 777 } 778 } 779 780 if (channel == stream_endpoint->l2cap_media_cid){ 781 btstack_assert(avdtp_sink_handle_media_data); 782 (*avdtp_sink_handle_media_data)(avdtp_local_seid(stream_endpoint), packet, size); 783 break; 784 } 785 786 if (channel == stream_endpoint->l2cap_reporting_cid){ 787 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 788 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 789 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 790 } else { 791 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 792 } 793 break; 794 795 case HCI_EVENT_PACKET: 796 switch (hci_event_packet_get_type(packet)) { 797 798 case L2CAP_EVENT_INCOMING_CONNECTION: 799 l2cap_event_incoming_connection_get_address(packet, event_addr); 800 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 801 con_handle = l2cap_event_incoming_connection_get_handle(packet); 802 outoing_signaling_active = false; 803 accept_streaming_connection = false; 804 805 connection = avdtp_get_connection_for_bd_addr(event_addr); 806 if (connection != NULL){ 807 switch (connection->state){ 808 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED: 809 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 810 outoing_signaling_active = true; 811 connection->incoming_declined = true; 812 break; 813 case AVDTP_SIGNALING_CONNECTION_OPENED: 814 outoing_signaling_active = true; 815 accept_streaming_connection = true; 816 break; 817 default: 818 break; 819 } 820 } 821 log_info("incoming: %s, outoing_signaling_active %d, accept_streaming_connection %d", 822 bd_addr_to_str(event_addr), outoing_signaling_active, accept_streaming_connection); 823 824 decline_connection = outoing_signaling_active && !accept_streaming_connection; 825 if (outoing_signaling_active == false){ 826 connection = avdtp_handle_incoming_connection(connection, event_addr, con_handle, local_cid); 827 if (connection == NULL){ 828 decline_connection = true; 829 } 830 } else if (accept_streaming_connection){ 831 if ((connection == NULL) || (connection->configuration_state != AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED)) { 832 decline_connection = true; 833 } else { 834 // now, we're only dealing with media connections that are created by remote side - we're acceptor here 835 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 836 if ((stream_endpoint == NULL) || (stream_endpoint->l2cap_media_cid != 0) ) { 837 decline_connection = true; 838 } 839 } 840 } 841 842 if (decline_connection){ 843 l2cap_decline_connection(local_cid); 844 } else { 845 l2cap_accept_connection(local_cid); 846 } 847 break; 848 849 case L2CAP_EVENT_CHANNEL_OPENED: 850 851 psm = l2cap_event_channel_opened_get_psm(packet); 852 if (psm != BLUETOOTH_PSM_AVDTP){ 853 log_info("Unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED "); 854 return; 855 } 856 857 status = l2cap_event_channel_opened_get_status(packet); 858 // inform about new l2cap connection 859 l2cap_event_channel_opened_get_address(packet, event_addr); 860 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 861 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 862 connection = avdtp_get_connection_for_bd_addr(event_addr); 863 if (connection == NULL){ 864 log_info("L2CAP_EVENT_CHANNEL_OPENED: no connection found for %s", bd_addr_to_str(event_addr)); 865 break; 866 } 867 868 con_handle = l2cap_event_channel_opened_get_handle(packet); 869 870 switch (connection->state){ 871 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 872 switch (status){ 873 case ERROR_CODE_SUCCESS: 874 connection->l2cap_signaling_cid = local_cid; 875 connection->incoming_declined = false; 876 connection->l2cap_mtu = l2cap_mtu; 877 connection->con_handle = con_handle; 878 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 879 log_info("Connection opened l2cap_signaling_cid 0x%02x, avdtp_cid 0x%02x, con_handle 0x%02x", connection->l2cap_signaling_cid, connection->avdtp_cid, con_handle); 880 avdtp_signaling_emit_connection_established(connection->avdtp_cid, event_addr, con_handle, status); 881 return; 882 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 883 if (connection->incoming_declined == true) { 884 log_info("Connection was declined, and the outgoing failed"); 885 connection->state = AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY; 886 connection->incoming_declined = false; 887 avdtp_retry_timer_start(connection); 888 return; 889 } 890 break; 891 default: 892 log_info("Connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 893 break; 894 } 895 avdtp_signaling_emit_connection_established(connection->avdtp_cid, event_addr, con_handle, status); 896 avdtp_finalize_connection(connection); 897 break; 898 899 case AVDTP_SIGNALING_CONNECTION_OPENED: 900 stream_endpoint = avdtp_get_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid); 901 if (!stream_endpoint){ 902 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found for signaling cid 0x%02x", connection->l2cap_signaling_cid); 903 return; 904 } 905 if (status != ERROR_CODE_SUCCESS){ 906 log_info("AVDTP_STREAM_ENDPOINT_OPENED failed with status %d, avdtp cid 0x%02x, l2cap_media_cid 0x%02x, local seid %d, remote seid %d", status, connection->avdtp_cid, stream_endpoint->l2cap_media_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint)); 907 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 908 avdtp_streaming_emit_connection_established(stream_endpoint, status); 909 break; 910 } 911 switch (stream_endpoint->state){ 912 case AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED: 913 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 914 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 915 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 916 917 log_info("AVDTP_STREAM_ENDPOINT_OPENED, avdtp cid 0x%02x, l2cap_media_cid 0x%02x, local seid %d, remote seid %d", connection->avdtp_cid, stream_endpoint->l2cap_media_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint)); 918 avdtp_streaming_emit_connection_established(stream_endpoint, ERROR_CODE_SUCCESS); 919 break; 920 default: 921 log_info("AVDTP_STREAM_ENDPOINT_OPENED failed - stream endpoint in wrong state %d, avdtp cid 0x%02x, l2cap_media_cid 0x%02x, local seid %d, remote seid %d", stream_endpoint->state, connection->avdtp_cid, stream_endpoint->l2cap_media_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint)); 922 avdtp_streaming_emit_connection_established(stream_endpoint, ERROR_CODE_COMMAND_DISALLOWED); 923 break; 924 } 925 break; 926 927 default: 928 log_info("L2CAP connection to %s ignored: status code 0x%02x, connection state %d", bd_addr_to_str(event_addr), status, connection->state); 929 break; 930 } 931 break; 932 933 case L2CAP_EVENT_CHANNEL_CLOSED: 934 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 935 stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(local_cid); 936 connection = avdtp_get_connection_for_l2cap_signaling_cid(local_cid); 937 938 log_info("Received L2CAP_EVENT_CHANNEL_CLOSED, cid 0x%2x, connection %p, stream_endpoint %p", local_cid, connection, stream_endpoint); 939 940 if (stream_endpoint){ 941 if (stream_endpoint->l2cap_media_cid == local_cid){ 942 connection = stream_endpoint->connection; 943 if (connection) { 944 avdtp_streaming_emit_connection_released(stream_endpoint, 945 connection->avdtp_cid, 946 avdtp_local_seid(stream_endpoint)); 947 } 948 avdtp_reset_stream_endpoint(stream_endpoint); 949 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 950 break; 951 } 952 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 953 log_info("L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid); 954 stream_endpoint->l2cap_recovery_cid = 0; 955 break; 956 } 957 958 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 959 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid); 960 stream_endpoint->l2cap_reporting_cid = 0; 961 break; 962 } 963 } 964 965 if (connection){ 966 btstack_linked_list_iterator_t it; 967 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 968 while (btstack_linked_list_iterator_has_next(&it)){ 969 stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 970 if (stream_endpoint->connection == connection){ 971 avdtp_reset_stream_endpoint(stream_endpoint); 972 } 973 } 974 avdtp_signaling_emit_connection_released(connection->avdtp_cid); 975 avdtp_finalize_connection(connection); 976 break; 977 } 978 break; 979 980 case L2CAP_EVENT_CAN_SEND_NOW: 981 log_debug("avdtp_packet_handler, L2CAP_EVENT_CAN_SEND_NOW l2cap_cid 0x%02x", channel); 982 avdtp_handle_can_send_now(channel); 983 break; 984 default: 985 log_info("Unknown HCI event type %02x", hci_event_packet_get_type(packet)); 986 break; 987 } 988 break; 989 990 default: 991 // other packet type 992 break; 993 } 994 } 995 996 uint8_t avdtp_disconnect(uint16_t avdtp_cid){ 997 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 998 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 999 1000 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return ERROR_CODE_SUCCESS; 1001 1002 btstack_linked_list_iterator_t it; 1003 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 1004 1005 while (btstack_linked_list_iterator_has_next(&it)){ 1006 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 1007 if (stream_endpoint->connection != connection) continue; 1008 1009 switch (stream_endpoint->state){ 1010 case AVDTP_STREAM_ENDPOINT_OPENED: 1011 case AVDTP_STREAM_ENDPOINT_STREAMING: 1012 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 1013 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 1014 break; 1015 default: 1016 break; 1017 } 1018 } 1019 1020 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 1021 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1022 return ERROR_CODE_SUCCESS; 1023 } 1024 1025 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 1026 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1027 if (!connection){ 1028 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 1029 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1030 } 1031 1032 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 1033 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 1034 return ERROR_CODE_COMMAND_DISALLOWED; 1035 } 1036 1037 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1038 if (!stream_endpoint) { 1039 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 1040 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1041 } 1042 1043 if (stream_endpoint->remote_sep.seid != remote_seid){ 1044 log_error("avdtp_media_connect: no remote sep with seid %d registered with the stream endpoint", remote_seid); 1045 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1046 } 1047 1048 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return ERROR_CODE_COMMAND_DISALLOWED; 1049 1050 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1051 connection->initiator_remote_seid = remote_seid; 1052 connection->initiator_local_seid = local_seid; 1053 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 1054 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 1055 avdtp_request_can_send_now_initiator(connection); 1056 return ERROR_CODE_SUCCESS; 1057 } 1058 1059 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1060 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1061 if (!connection){ 1062 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1063 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1064 } 1065 1066 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1067 if (!stream_endpoint) { 1068 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 1069 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1070 } 1071 1072 if (stream_endpoint->l2cap_media_cid == 0){ 1073 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1074 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1075 } 1076 1077 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1078 log_error("avdtp_media_connect: no remote sep registered with the stream endpoint"); 1079 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1080 } 1081 1082 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->start_stream == 1){ 1083 return ERROR_CODE_COMMAND_DISALLOWED; 1084 } 1085 1086 stream_endpoint->start_stream = 1; 1087 connection->initiator_local_seid = local_seid; 1088 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1089 avdtp_request_can_send_now_initiator(connection); 1090 return ERROR_CODE_SUCCESS; 1091 } 1092 1093 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1094 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1095 if (!connection){ 1096 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1097 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1098 } 1099 1100 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1101 if (!stream_endpoint) { 1102 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 1103 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1104 } 1105 1106 if (stream_endpoint->l2cap_media_cid == 0){ 1107 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1108 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1109 } 1110 1111 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->close_stream){ 1112 return ERROR_CODE_COMMAND_DISALLOWED; 1113 } 1114 1115 stream_endpoint->close_stream = 1; 1116 connection->initiator_local_seid = local_seid; 1117 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1118 avdtp_request_can_send_now_initiator(connection); 1119 return ERROR_CODE_SUCCESS; 1120 } 1121 1122 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1123 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1124 if (!connection){ 1125 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1126 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1127 } 1128 1129 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1130 if (!stream_endpoint) { 1131 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 1132 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1133 } 1134 1135 if (stream_endpoint->l2cap_media_cid == 0){ 1136 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1137 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1138 } 1139 1140 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->abort_stream){ 1141 return ERROR_CODE_COMMAND_DISALLOWED; 1142 } 1143 1144 stream_endpoint->abort_stream = 1; 1145 connection->initiator_local_seid = local_seid; 1146 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1147 avdtp_request_can_send_now_initiator(connection); 1148 return ERROR_CODE_SUCCESS; 1149 } 1150 1151 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1152 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1153 if (!connection){ 1154 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1155 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1156 } 1157 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1158 if (!stream_endpoint) { 1159 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 1160 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1161 } 1162 1163 if (stream_endpoint->l2cap_media_cid == 0){ 1164 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1165 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1166 } 1167 1168 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->suspend_stream){ 1169 return ERROR_CODE_COMMAND_DISALLOWED; 1170 } 1171 1172 stream_endpoint->suspend_stream = 1; 1173 connection->initiator_local_seid = local_seid; 1174 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1175 avdtp_request_can_send_now_initiator(connection); 1176 return ERROR_CODE_SUCCESS; 1177 } 1178 1179 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid){ 1180 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1181 if (!connection){ 1182 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 1183 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1184 } 1185 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1186 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1187 return ERROR_CODE_COMMAND_DISALLOWED; 1188 } 1189 1190 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1191 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 1192 return avdtp_request_can_send_now_initiator(connection); 1193 } 1194 1195 1196 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 1197 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1198 if (!connection){ 1199 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1200 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1201 } 1202 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1203 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1204 return ERROR_CODE_COMMAND_DISALLOWED; 1205 } 1206 1207 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1208 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 1209 connection->initiator_remote_seid = remote_seid; 1210 return avdtp_request_can_send_now_initiator(connection); 1211 } 1212 1213 1214 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 1215 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1216 if (!connection){ 1217 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1218 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1219 } 1220 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1221 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1222 return ERROR_CODE_COMMAND_DISALLOWED; 1223 } 1224 1225 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1226 connection->initiator_remote_seid = remote_seid; 1227 1228 if (connection->avdtp_version == 0){ 1229 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES; 1230 avdtp_handle_sdp_client_query_request.callback = &avdtp_handle_start_sdp_client_query; 1231 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1232 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 1233 return ERROR_CODE_SUCCESS; 1234 } else { 1235 // AVDTP version lower then 1.3 supports only get capabilities command 1236 if (connection->avdtp_version < 0x103){ 1237 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 1238 } else { 1239 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 1240 } 1241 return avdtp_request_can_send_now_initiator(connection); 1242 } 1243 } 1244 1245 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid){ 1246 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1247 if (!connection){ 1248 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1249 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1250 } 1251 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1252 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1253 return ERROR_CODE_COMMAND_DISALLOWED; 1254 } 1255 1256 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1257 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 1258 connection->initiator_remote_seid = remote_seid; 1259 return avdtp_request_can_send_now_initiator(connection); 1260 } 1261 1262 uint8_t avdtp_set_configuration(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 1263 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1264 if (!connection){ 1265 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1266 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1267 } 1268 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1269 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1270 log_error("connection in wrong state, %d, initiator state %d", connection->state, connection->initiator_connection_state); 1271 return ERROR_CODE_COMMAND_DISALLOWED; 1272 } 1273 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_IDLE){ 1274 log_info("configuration already started, config state %u", connection->configuration_state); 1275 return ERROR_CODE_COMMAND_DISALLOWED; 1276 } 1277 1278 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1279 if (!stream_endpoint) { 1280 log_error("No initiator stream endpoint for seid %d", local_seid); 1281 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1282 } 1283 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_CONFIGURED){ 1284 log_error("Stream endpoint seid %d in wrong state %d", local_seid, stream_endpoint->state); 1285 return ERROR_CODE_COMMAND_DISALLOWED; 1286 } 1287 1288 connection->active_stream_endpoint = (void*) stream_endpoint; 1289 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED; 1290 1291 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1292 connection->initiator_remote_seid = remote_seid; 1293 connection->initiator_local_seid = local_seid; 1294 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1295 stream_endpoint->remote_configuration = configuration; 1296 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 1297 1298 log_debug("SE %p, initiator_config_state: 0x%02x", stream_endpoint, stream_endpoint->initiator_config_state); 1299 1300 return avdtp_request_can_send_now_initiator(connection); 1301 } 1302 1303 uint8_t avdtp_reconfigure(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 1304 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1305 if (!connection){ 1306 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1307 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1308 } 1309 //TODO: if opened only app capabilities, enable reconfigure for not opened 1310 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1311 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1312 return ERROR_CODE_COMMAND_DISALLOWED; 1313 } 1314 1315 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1316 if (!stream_endpoint) { 1317 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 1318 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1319 } 1320 1321 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1322 log_error("avdtp_reconfigure: no associated remote sep"); 1323 return ERROR_CODE_COMMAND_DISALLOWED; 1324 } 1325 1326 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1327 connection->initiator_remote_seid = remote_seid; 1328 connection->initiator_local_seid = local_seid; 1329 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1330 stream_endpoint->remote_configuration = configuration; 1331 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 1332 return avdtp_request_can_send_now_initiator(connection); 1333 } 1334 1335 void avdtp_set_preferred_sampling_frequeny(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency){ 1336 stream_endpoint->preferred_sampling_frequency = sampling_frequency; 1337 } 1338 1339 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode){ 1340 stream_endpoint->preferred_channel_mode = channel_mode; 1341 } 1342 1343 1344 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1345 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1346 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1347 1348 // use preferred channel mode if possible 1349 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_JOINT_STEREO){ 1350 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1351 } 1352 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_STEREO){ 1353 return AVDTP_CHANNEL_MODE_STEREO; 1354 } 1355 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_DUAL_CHANNEL){ 1356 return AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1357 } 1358 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_MONO){ 1359 return AVDTP_CHANNEL_MODE_MONO; 1360 } 1361 1362 1363 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1364 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1365 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1366 return AVDTP_CHANNEL_MODE_STEREO; 1367 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1368 return AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1369 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1370 return AVDTP_CHANNEL_MODE_MONO; 1371 } 1372 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1373 } 1374 1375 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1376 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1377 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1378 1379 avdtp_sbc_allocation_method_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1380 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1381 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1382 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1383 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1384 } 1385 return allocation_method; 1386 } 1387 1388 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1389 if (!stream_endpoint) return 0; 1390 return stream_endpoint->sep.seid; 1391 } 1392 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1393 if (!stream_endpoint) return 0; 1394 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1395 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1396 1397 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1398 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1399 subbands = AVDTP_SBC_SUBBANDS_8; 1400 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1401 subbands = AVDTP_SBC_SUBBANDS_4; 1402 } 1403 return subbands; 1404 } 1405 1406 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1407 if (!stream_endpoint) return 0; 1408 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1409 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1410 1411 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1412 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1413 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1414 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1415 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1416 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1417 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1418 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1419 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1420 } 1421 return block_length; 1422 } 1423 1424 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1425 if (!stream_endpoint) return 0; 1426 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1427 uint8_t supported_sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1428 1429 // use preferred sampling frequency if possible 1430 if ((stream_endpoint->preferred_sampling_frequency == 48000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_48000)){ 1431 return stream_endpoint->preferred_sampling_frequency; 1432 } 1433 if ((stream_endpoint->preferred_sampling_frequency == 44100) && (supported_sampling_frequency_bitmap & AVDTP_SBC_44100)){ 1434 return stream_endpoint->preferred_sampling_frequency; 1435 } 1436 if ((stream_endpoint->preferred_sampling_frequency == 32000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_32000)){ 1437 return stream_endpoint->preferred_sampling_frequency; 1438 } 1439 if ((stream_endpoint->preferred_sampling_frequency == 16000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_16000)){ 1440 return stream_endpoint->preferred_sampling_frequency; 1441 } 1442 1443 // otherwise, use highest available 1444 if (supported_sampling_frequency_bitmap & AVDTP_SBC_48000){ 1445 return 48000; 1446 } 1447 if (supported_sampling_frequency_bitmap & AVDTP_SBC_44100){ 1448 return 44100; 1449 } 1450 if (supported_sampling_frequency_bitmap & AVDTP_SBC_32000){ 1451 return 32000; 1452 } 1453 if (supported_sampling_frequency_bitmap & AVDTP_SBC_16000){ 1454 return 16000; 1455 } 1456 return 44100; // some default 1457 } 1458 1459 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1460 if (!stream_endpoint) return 0; 1461 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1462 return btstack_min(media_codec[3], remote_max_bitpool_value); 1463 } 1464 1465 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1466 if (!stream_endpoint) return 0; 1467 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1468 return btstack_max(media_codec[2], remote_min_bitpool_value); 1469 } 1470 1471 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint){ 1472 if (!stream_endpoint) return 0; 1473 if (stream_endpoint->remote_sep.seid == 0) return 0; 1474 if (stream_endpoint->remote_sep.seid > 0x3E) return 0; 1475 return 1; 1476 } 1477 1478 void avdtp_init(void){ 1479 if (!l2cap_registered){ 1480 l2cap_registered = true; 1481 l2cap_register_service(&avdtp_packet_handler, BLUETOOTH_PSM_AVDTP, 0xffff, gap_get_security_level()); 1482 } 1483 } 1484 1485 void avdtp_deinit(void){ 1486 l2cap_registered = false; 1487 stream_endpoints = NULL; 1488 connections = NULL; 1489 avdtp_sink_handle_media_data = NULL; 1490 1491 sdp_query_context_avdtp_cid = 0; 1492 stream_endpoints_id_counter = 0; 1493 transaction_id_counter = 0; 1494 avdtp_cid_counter = 0; 1495 } 1496