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_util.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "btstack.h" 44 #include "avdtp.h" 45 #include "avdtp_util.h" 46 47 #define MAX_MEDIA_CODEC_INFORMATION_LENGTH 100 48 49 50 /* 51 52 List of AVDTP_SUBEVENTs sorted by packet handler 53 54 55 Sink + Source: 56 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED 57 - AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED 58 - AVDTP_SUBEVENT_SIGNALING_SEP_FOUND 59 - AVDTP_SUBEVENT_SIGNALING_ACCEPT 60 - AVDTP_SUBEVENT_SIGNALING_REJECT 61 - AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT 62 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY 63 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY 64 - AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY 65 - AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY 66 - AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY 67 - AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY 68 - AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY 69 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY 70 - AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY 71 - AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE 72 - AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE 73 74 Source: 75 - AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT 76 77 Sink or Source based on SEP Type: 78 - AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED 79 - AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED 80 - AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW 81 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION 82 - AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION 83 84 */ 85 86 static const char * avdtp_si_name[] = { 87 "ERROR", 88 "AVDTP_SI_DISCOVER", 89 "AVDTP_SI_GET_CAPABILITIES", 90 "AVDTP_SI_SET_CONFIGURATION", 91 "AVDTP_SI_GET_CONFIGURATION", 92 "AVDTP_SI_RECONFIGURE", 93 "AVDTP_SI_OPEN", 94 "AVDTP_SI_START", 95 "AVDTP_SI_CLOSE", 96 "AVDTP_SI_SUSPEND", 97 "AVDTP_SI_ABORT", 98 "AVDTP_SI_SECURITY_CONTROL", 99 "AVDTP_SI_GET_ALL_CAPABILITIES", 100 "AVDTP_SI_DELAY_REPORT" 101 }; 102 const char * avdtp_si2str(uint16_t index){ 103 if ((index <= 0) || (index >= sizeof(avdtp_si_name)/sizeof(avdtp_si_name[0]) )) return avdtp_si_name[0]; 104 return avdtp_si_name[index]; 105 } 106 107 void avdtp_reset_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 108 stream_endpoint->media_con_handle = 0; 109 stream_endpoint->l2cap_media_cid = 0; 110 stream_endpoint->l2cap_reporting_cid = 0; 111 stream_endpoint->l2cap_recovery_cid = 0; 112 113 stream_endpoint->connection = NULL; 114 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 115 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 116 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 117 118 stream_endpoint->sep.in_use = 0; 119 memset(&stream_endpoint->remote_sep, 0, sizeof(avdtp_sep_t)); 120 // memset(&stream_endpoint->remote_capabilities, 0, sizeof(avdtp_capabilities_t)); 121 // memset(&stream_endpoint->remote_configuration, 0, sizeof(avdtp_capabilities_t)); 122 123 stream_endpoint->remote_capabilities_bitmap = 0; 124 stream_endpoint->remote_configuration_bitmap = 0; 125 126 stream_endpoint->media_disconnect = 0; 127 stream_endpoint->media_connect = 0; 128 stream_endpoint->start_stream = 0; 129 stream_endpoint->stop_stream = 0; 130 stream_endpoint->send_stream = 0; 131 stream_endpoint->abort_stream = 0; 132 stream_endpoint->suspend_stream = 0; 133 stream_endpoint->sequence_number = 0; 134 } 135 136 int get_bit16(uint16_t bitmap, int position){ 137 return (bitmap >> position) & 1; 138 } 139 140 uint16_t store_bit16(uint16_t bitmap, int position, uint8_t value){ 141 if (value){ 142 bitmap |= 1 << position; 143 } else { 144 bitmap &= ~ (1 << position); 145 } 146 return bitmap; 147 } 148 149 avdtp_message_type_t avdtp_get_signaling_packet_type(uint8_t * packet){ 150 return (avdtp_message_type_t) (packet[0] & 0x03); 151 } 152 153 int avdtp_read_signaling_header(avdtp_signaling_packet_t * signaling_header, uint8_t * packet, uint16_t size){ 154 int pos = 0; 155 if (size < 2) return pos; 156 signaling_header->transaction_label = packet[pos] >> 4; 157 signaling_header->packet_type = (avdtp_packet_type_t)((packet[pos] >> 2) & 0x03); 158 signaling_header->message_type = (avdtp_message_type_t) (packet[pos] & 0x03); 159 pos++; 160 memset(signaling_header->command, 0, sizeof(signaling_header->command)); 161 switch (signaling_header->packet_type){ 162 case AVDTP_SINGLE_PACKET: 163 signaling_header->num_packets = 0; 164 signaling_header->offset = 0; 165 signaling_header->size = 0; 166 break; 167 case AVDTP_END_PACKET: 168 signaling_header->num_packets = 0; 169 break; 170 case AVDTP_START_PACKET: 171 signaling_header->num_packets = packet[pos++]; 172 signaling_header->size = 0; 173 signaling_header->offset = 0; 174 break; 175 case AVDTP_CONTINUE_PACKET: 176 if (signaling_header->num_packets <= 0) { 177 log_info(" ERROR: wrong num fragmented packets\n"); 178 break; 179 } 180 signaling_header->num_packets--; 181 break; 182 } 183 signaling_header->signal_identifier = (avdtp_signal_identifier_t)(packet[pos++] & 0x3f); 184 return pos; 185 } 186 187 static bool avdtp_is_basic_capability(int service_category){ 188 return (AVDTP_MEDIA_TRANSPORT <= service_category) && (service_category <= AVDTP_MEDIA_CODEC); 189 } 190 191 int avdtp_pack_service_capabilities(uint8_t *buffer, int size, avdtp_capabilities_t caps, avdtp_service_category_t category) { 192 UNUSED(size); 193 194 int i; 195 // pos = 0 reserved for length 196 int pos = 1; 197 switch(category){ 198 case AVDTP_MEDIA_TRANSPORT: 199 case AVDTP_REPORTING: 200 case AVDTP_DELAY_REPORTING: 201 break; 202 case AVDTP_RECOVERY: 203 buffer[pos++] = caps.recovery.recovery_type; // 0x01=RFC2733 204 buffer[pos++] = caps.recovery.maximum_recovery_window_size; 205 buffer[pos++] = caps.recovery.maximum_number_media_packets; 206 break; 207 case AVDTP_CONTENT_PROTECTION: 208 buffer[pos++] = caps.content_protection.cp_type_value_len + 2; 209 big_endian_store_16(buffer, pos, caps.content_protection.cp_type); 210 pos += 2; 211 (void)memcpy(buffer + pos, caps.content_protection.cp_type_value, 212 caps.content_protection.cp_type_value_len); 213 pos += caps.content_protection.cp_type_value_len; 214 break; 215 case AVDTP_HEADER_COMPRESSION: 216 buffer[pos++] = (caps.header_compression.back_ch << 7) | (caps.header_compression.media << 6) | (caps.header_compression.recovery << 5); 217 break; 218 case AVDTP_MULTIPLEXING: 219 buffer[pos++] = caps.multiplexing_mode.fragmentation << 7; 220 for (i=0; i<caps.multiplexing_mode.transport_identifiers_num; i++){ 221 buffer[pos++] = caps.multiplexing_mode.transport_session_identifiers[i] << 7; 222 buffer[pos++] = caps.multiplexing_mode.tcid[i] << 7; 223 // media, reporting. recovery 224 } 225 break; 226 case AVDTP_MEDIA_CODEC: 227 buffer[pos++] = ((uint8_t)caps.media_codec.media_type) << 4; 228 buffer[pos++] = (uint8_t)caps.media_codec.media_codec_type; 229 for (i = 0; i<caps.media_codec.media_codec_information_len; i++){ 230 buffer[pos++] = caps.media_codec.media_codec_information[i]; 231 } 232 break; 233 default: 234 break; 235 } 236 buffer[0] = pos - 1; // length 237 return pos; 238 } 239 240 static int avdtp_unpack_service_capabilities_has_errors(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_service_category_t category, uint8_t cap_len){ 241 connection->error_code = 0; 242 243 if ((category == AVDTP_SERVICE_CATEGORY_INVALID_0) || 244 ((category == AVDTP_SERVICE_CATEGORY_INVALID_FF) && (signal_identifier == AVDTP_SI_RECONFIGURE))){ 245 log_info(" ERROR: BAD SERVICE CATEGORY %d\n", category); 246 connection->reject_service_category = category; 247 connection->error_code = BAD_SERV_CATEGORY; 248 return 1; 249 } 250 251 if (signal_identifier == AVDTP_SI_RECONFIGURE){ 252 if ( (category != AVDTP_CONTENT_PROTECTION) && (category != AVDTP_MEDIA_CODEC)){ 253 log_info(" ERROR: REJECT CATEGORY, INVALID_CAPABILITIES\n"); 254 connection->reject_service_category = category; 255 connection->error_code = INVALID_CAPABILITIES; 256 return 1; 257 } 258 } 259 260 switch(category){ 261 case AVDTP_MEDIA_TRANSPORT: 262 if (cap_len != 0){ 263 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 264 connection->reject_service_category = category; 265 connection->error_code = BAD_MEDIA_TRANSPORT_FORMAT; 266 return 1; 267 } 268 break; 269 case AVDTP_REPORTING: 270 case AVDTP_DELAY_REPORTING: 271 if (cap_len != 0){ 272 log_info(" ERROR: REJECT CATEGORY, BAD_LENGTH\n"); 273 connection->reject_service_category = category; 274 connection->error_code = BAD_LENGTH; 275 return 1; 276 } 277 break; 278 case AVDTP_RECOVERY: 279 if (cap_len != 3){ 280 log_info(" ERROR: REJECT CATEGORY, BAD_MEDIA_TRANSPORT\n"); 281 connection->reject_service_category = category; 282 connection->error_code = BAD_RECOVERY_FORMAT; 283 return 1; 284 } 285 break; 286 case AVDTP_CONTENT_PROTECTION: 287 if (cap_len < 2){ 288 log_info(" ERROR: REJECT CATEGORY, BAD_CP_FORMAT\n"); 289 connection->reject_service_category = category; 290 connection->error_code = BAD_CP_FORMAT; 291 return 1; 292 } 293 break; 294 case AVDTP_HEADER_COMPRESSION: 295 // TODO: find error code for bad header compression 296 if (cap_len != 1){ 297 log_info(" ERROR: REJECT CATEGORY, BAD_HEADER_COMPRESSION\n"); 298 connection->reject_service_category = category; 299 connection->error_code = BAD_RECOVERY_FORMAT; 300 return 1; 301 } 302 break; 303 case AVDTP_MULTIPLEXING: 304 break; 305 case AVDTP_MEDIA_CODEC: 306 break; 307 default: 308 break; 309 } 310 return 0; 311 } 312 313 uint16_t avdtp_unpack_service_capabilities(avdtp_connection_t * connection, avdtp_signal_identifier_t signal_identifier, avdtp_capabilities_t * caps, uint8_t * packet, uint16_t size){ 314 315 int i; 316 317 uint16_t registered_service_categories = 0; 318 uint16_t to_process = size; 319 320 while (to_process >= 2){ 321 322 avdtp_service_category_t category = (avdtp_service_category_t) packet[0]; 323 uint8_t cap_len = packet[1]; 324 packet += 2; 325 to_process -= 2; 326 327 if (cap_len > to_process){ 328 connection->reject_service_category = category; 329 connection->error_code = BAD_LENGTH; 330 return 0; 331 } 332 333 if (avdtp_unpack_service_capabilities_has_errors(connection, signal_identifier, category, cap_len)) return 0; 334 335 int category_valid = 1; 336 337 uint8_t * data = packet; 338 uint16_t pos = 0; 339 340 switch(category){ 341 case AVDTP_RECOVERY: 342 caps->recovery.recovery_type = data[pos++]; 343 caps->recovery.maximum_recovery_window_size = data[pos++]; 344 caps->recovery.maximum_number_media_packets = data[pos++]; 345 break; 346 case AVDTP_CONTENT_PROTECTION: 347 caps->content_protection.cp_type = big_endian_read_16(data, 0); 348 caps->content_protection.cp_type_value_len = cap_len - 2; 349 // connection->reject_service_category = category; 350 // connection->error_code = UNSUPPORTED_CONFIGURATION; 351 // support for content protection goes here 352 break; 353 case AVDTP_HEADER_COMPRESSION: 354 caps->header_compression.back_ch = (data[0] >> 7) & 1; 355 caps->header_compression.media = (data[0] >> 6) & 1; 356 caps->header_compression.recovery = (data[0] >> 5) & 1; 357 break; 358 case AVDTP_MULTIPLEXING: 359 caps->multiplexing_mode.fragmentation = (data[pos++] >> 7) & 1; 360 // read [tsid, tcid] for media, reporting. recovery respectively 361 caps->multiplexing_mode.transport_identifiers_num = 3; 362 for (i=0; i<caps->multiplexing_mode.transport_identifiers_num; i++){ 363 caps->multiplexing_mode.transport_session_identifiers[i] = (data[pos++] >> 7) & 1; 364 caps->multiplexing_mode.tcid[i] = (data[pos++] >> 7) & 1; 365 } 366 break; 367 case AVDTP_MEDIA_CODEC: 368 caps->media_codec.media_type = (avdtp_media_type_t)(data[pos++] >> 4); 369 caps->media_codec.media_codec_type = (avdtp_media_codec_type_t)(data[pos++]); 370 caps->media_codec.media_codec_information_len = cap_len - 2; 371 caps->media_codec.media_codec_information = &data[pos++]; 372 break; 373 case AVDTP_MEDIA_TRANSPORT: 374 case AVDTP_REPORTING: 375 case AVDTP_DELAY_REPORTING: 376 break; 377 default: 378 category_valid = 0; 379 break; 380 } 381 382 if (category_valid) { 383 registered_service_categories = store_bit16(registered_service_categories, category, 1); 384 } 385 386 packet += cap_len; 387 to_process -= cap_len; 388 } 389 390 return registered_service_categories; 391 } 392 393 void avdtp_prepare_capabilities(avdtp_signaling_packet_t * signaling_packet, uint8_t transaction_label, uint16_t service_categories, avdtp_capabilities_t capabilities, uint8_t identifier){ 394 if (signaling_packet->offset) return; 395 bool basic_capabilities_only = false; 396 signaling_packet->message_type = AVDTP_RESPONSE_ACCEPT_MSG; 397 int i; 398 399 signaling_packet->size = 0; 400 memset(signaling_packet->command, 0 , sizeof(signaling_packet->command)); 401 402 switch (identifier) { 403 case AVDTP_SI_GET_CAPABILITIES: 404 basic_capabilities_only = true; 405 break; 406 case AVDTP_SI_GET_ALL_CAPABILITIES: 407 break; 408 case AVDTP_SI_SET_CONFIGURATION: 409 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 410 signaling_packet->command[signaling_packet->size++] = signaling_packet->int_seid << 2; 411 signaling_packet->message_type = AVDTP_CMD_MSG; 412 break; 413 case AVDTP_SI_RECONFIGURE: 414 signaling_packet->command[signaling_packet->size++] = signaling_packet->acp_seid << 2; 415 signaling_packet->message_type = AVDTP_CMD_MSG; 416 break; 417 default: 418 log_error("avdtp_prepare_capabilities wrong identifier %d", identifier); 419 break; 420 } 421 422 for (i = AVDTP_MEDIA_TRANSPORT; i <= AVDTP_DELAY_REPORTING; i++){ 423 int registered_category = get_bit16(service_categories, i); 424 if (!registered_category && (identifier == AVDTP_SI_SET_CONFIGURATION)){ 425 // TODO: introduce bitmap of mandatory categories 426 if (i == AVDTP_MEDIA_TRANSPORT){ 427 registered_category = true; 428 } 429 } 430 // AVDTP_SI_GET_CAPABILITIES reports only basic capabilities (i.e., it skips non-basic categories) 431 if (basic_capabilities_only && !avdtp_is_basic_capability(i)){ 432 registered_category = false; 433 } 434 435 if (registered_category){ 436 // service category 437 signaling_packet->command[signaling_packet->size++] = i; 438 signaling_packet->size += avdtp_pack_service_capabilities(signaling_packet->command + signaling_packet->size, 439 sizeof(signaling_packet->command) - signaling_packet->size, capabilities, (avdtp_service_category_t) i); 440 } 441 } 442 signaling_packet->signal_identifier = (avdtp_signal_identifier_t)identifier; 443 signaling_packet->transaction_label = transaction_label; 444 } 445 446 int avdtp_signaling_create_fragment(uint16_t cid, avdtp_signaling_packet_t * signaling_packet, uint8_t * out_buffer) { 447 int mtu = l2cap_get_remote_mtu_for_local_cid(cid); 448 int data_len = 0; 449 450 uint16_t offset = signaling_packet->offset; 451 uint16_t pos = 1; 452 453 if (offset == 0){ 454 if (signaling_packet->size <= (mtu - 2)){ 455 signaling_packet->packet_type = AVDTP_SINGLE_PACKET; 456 out_buffer[pos++] = signaling_packet->signal_identifier; 457 data_len = signaling_packet->size; 458 } else { 459 signaling_packet->packet_type = AVDTP_START_PACKET; 460 out_buffer[pos++] = (mtu + signaling_packet->size)/ (mtu-1); 461 out_buffer[pos++] = signaling_packet->signal_identifier; 462 data_len = mtu - 3; 463 signaling_packet->offset = data_len; 464 } 465 } else { 466 int remaining_bytes = signaling_packet->size - offset; 467 if (remaining_bytes <= (mtu - 1)){ 468 signaling_packet->packet_type = AVDTP_END_PACKET; 469 data_len = remaining_bytes; 470 signaling_packet->offset = 0; 471 } else{ 472 signaling_packet->packet_type = AVDTP_CONTINUE_PACKET; 473 data_len = mtu - 1; 474 signaling_packet->offset += data_len; 475 } 476 } 477 out_buffer[0] = avdtp_header(signaling_packet->transaction_label, signaling_packet->packet_type, signaling_packet->message_type); 478 (void)memcpy(out_buffer + pos, signaling_packet->command + offset, 479 data_len); 480 pos += data_len; 481 return pos; 482 } 483 484 485 void avdtp_signaling_emit_connection_established(uint16_t avdtp_cid, bd_addr_t addr, uint8_t status) { 486 uint8_t event[12]; 487 int pos = 0; 488 event[pos++] = HCI_EVENT_AVDTP_META; 489 event[pos++] = sizeof(event) - 2; 490 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 491 little_endian_store_16(event, pos, avdtp_cid); 492 pos += 2; 493 reverse_bd_addr(addr,&event[pos]); 494 pos += 6; 495 event[pos++] = status; 496 avdtp_emit_sink_and_source(event, pos); 497 } 498 499 void avdtp_signaling_emit_connection_released(uint16_t avdtp_cid) { 500 uint8_t event[5]; 501 int pos = 0; 502 event[pos++] = HCI_EVENT_AVDTP_META; 503 event[pos++] = sizeof(event) - 2; 504 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 505 little_endian_store_16(event, pos, avdtp_cid); 506 pos += 2; 507 avdtp_emit_sink_and_source(event, pos); 508 } 509 510 void avdtp_signaling_emit_sep(uint16_t avdtp_cid, avdtp_sep_t sep) { 511 uint8_t event[9]; 512 int pos = 0; 513 event[pos++] = HCI_EVENT_AVDTP_META; 514 event[pos++] = sizeof(event) - 2; 515 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_FOUND; 516 little_endian_store_16(event, pos, avdtp_cid); 517 pos += 2; 518 event[pos++] = sep.seid; 519 event[pos++] = sep.in_use; 520 event[pos++] = sep.media_type; 521 event[pos++] = sep.type; 522 avdtp_emit_sink_and_source(event, pos); 523 } 524 525 void avdtp_signaling_emit_sep_done(uint16_t avdtp_cid) { 526 uint8_t event[5]; 527 int pos = 0; 528 event[pos++] = HCI_EVENT_AVDTP_META; 529 event[pos++] = sizeof(event) - 2; 530 event[pos++] = AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE; 531 little_endian_store_16(event, pos, avdtp_cid); 532 pos += 2; 533 avdtp_emit_sink_and_source(event, pos); 534 } 535 536 void avdtp_signaling_emit_accept(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 537 uint8_t event[8]; 538 int pos = 0; 539 event[pos++] = HCI_EVENT_AVDTP_META; 540 event[pos++] = sizeof(event) - 2; 541 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 542 little_endian_store_16(event, pos, avdtp_cid); 543 pos += 2; 544 event[pos++] = local_seid; 545 event[pos++] = is_initiator ? 1 : 0; 546 event[pos++] = identifier; 547 avdtp_emit_sink_and_source(event, pos); 548 } 549 550 void avdtp_signaling_emit_accept_for_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator){ 551 uint8_t event[8]; 552 int pos = 0; 553 event[pos++] = HCI_EVENT_AVDTP_META; 554 event[pos++] = sizeof(event) - 2; 555 event[pos++] = AVDTP_SUBEVENT_SIGNALING_ACCEPT; 556 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 557 pos += 2; 558 event[pos++] = local_seid; 559 event[pos++] = is_initiator ? 1 : 0; 560 event[pos++] = identifier; 561 562 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 563 (*packet_handler)(HCI_EVENT_PACKET, 0, event, pos); 564 } 565 566 void avdtp_signaling_emit_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 567 uint8_t event[8]; 568 int pos = 0; 569 event[pos++] = HCI_EVENT_AVDTP_META; 570 event[pos++] = sizeof(event) - 2; 571 event[pos++] = AVDTP_SUBEVENT_SIGNALING_REJECT; 572 little_endian_store_16(event, pos, avdtp_cid); 573 pos += 2; 574 event[pos++] = local_seid; 575 event[pos++] = is_initiator ? 1 : 0; 576 event[pos++] = identifier; 577 avdtp_emit_sink_and_source(event, pos); 578 } 579 580 void avdtp_signaling_emit_general_reject(uint16_t avdtp_cid, uint8_t local_seid, avdtp_signal_identifier_t identifier, bool is_initiator) { 581 uint8_t event[8]; 582 int pos = 0; 583 event[pos++] = HCI_EVENT_AVDTP_META; 584 event[pos++] = sizeof(event) - 2; 585 event[pos++] = AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT; 586 little_endian_store_16(event, pos, avdtp_cid); 587 pos += 2; 588 event[pos++] = local_seid; 589 event[pos++] = is_initiator ? 1 : 0; 590 event[pos++] = identifier; 591 avdtp_emit_sink_and_source(event, pos); 592 } 593 594 static inline void 595 avdtp_signaling_emit_capability(uint8_t capability_subevent_id, uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 596 uint8_t event[7]; 597 int pos = 0; 598 event[pos++] = HCI_EVENT_AVDTP_META; 599 event[pos++] = sizeof(event) - 2; 600 event[pos++] = capability_subevent_id; 601 little_endian_store_16(event, pos, avdtp_cid); 602 pos += 2; 603 event[pos++] = local_seid; 604 event[pos++] = remote_seid; 605 avdtp_emit_sink_and_source(event, pos); 606 } 607 608 static void avdtp_signaling_emit_media_codec_sbc_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 609 adtvp_media_codec_capabilities_t media_codec) { 610 uint8_t event[15]; 611 int pos = 0; 612 event[pos++] = HCI_EVENT_AVDTP_META; 613 event[pos++] = sizeof(event) - 2; 614 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY; 615 little_endian_store_16(event, pos, avdtp_cid); 616 pos += 2; 617 event[pos++] = local_seid; 618 event[pos++] = remote_seid; 619 event[pos++] = media_codec.media_type; 620 event[pos++] = media_codec.media_codec_information[0] >> 4; 621 event[pos++] = media_codec.media_codec_information[0] & 0x0F; 622 event[pos++] = media_codec.media_codec_information[1] >> 4; 623 event[pos++] = (media_codec.media_codec_information[1] & 0x0F) >> 2; 624 event[pos++] = media_codec.media_codec_information[1] & 0x03; 625 event[pos++] = media_codec.media_codec_information[2]; 626 event[pos++] = media_codec.media_codec_information[3]; 627 avdtp_emit_sink_and_source(event, pos); 628 } 629 630 static void avdtp_signaling_emit_media_codec_other_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 631 adtvp_media_codec_capabilities_t media_codec) { 632 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 12]; 633 int pos = 0; 634 event[pos++] = HCI_EVENT_AVDTP_META; 635 event[pos++] = sizeof(event) - 2; 636 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY; 637 little_endian_store_16(event, pos, avdtp_cid); 638 pos += 2; 639 event[pos++] = local_seid; 640 event[pos++] = remote_seid; 641 event[pos++] = media_codec.media_type; 642 little_endian_store_16(event, pos, media_codec.media_codec_type); 643 pos += 2; 644 little_endian_store_16(event, pos, media_codec.media_codec_information_len); 645 pos += 2; 646 (void)memcpy(event + pos, media_codec.media_codec_information, 647 btstack_min(media_codec.media_codec_information_len, MAX_MEDIA_CODEC_INFORMATION_LENGTH)); 648 avdtp_emit_sink_and_source(event, pos); 649 } 650 651 static void 652 avdtp_signaling_emit_media_transport_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 653 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, avdtp_cid, local_seid, 654 remote_seid); 655 } 656 657 static void avdtp_signaling_emit_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 658 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, avdtp_cid, local_seid, remote_seid); 659 } 660 661 static void 662 avdtp_signaling_emit_delay_reporting_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 663 avdtp_signaling_emit_capability(AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, avdtp_cid, local_seid, 664 remote_seid); 665 } 666 667 static void avdtp_signaling_emit_recovery_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 668 avdtp_recovery_capabilities_t *recovery) { 669 uint8_t event[10]; 670 int pos = 0; 671 event[pos++] = HCI_EVENT_AVDTP_META; 672 event[pos++] = sizeof(event) - 2; 673 event[pos++] = AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY; 674 little_endian_store_16(event, pos, avdtp_cid); 675 pos += 2; 676 event[pos++] = local_seid; 677 event[pos++] = remote_seid; 678 event[pos++] = recovery->recovery_type; 679 event[pos++] = recovery->maximum_recovery_window_size; 680 event[pos++] = recovery->maximum_number_media_packets; 681 avdtp_emit_sink_and_source(event, pos); 682 } 683 684 static void 685 avdtp_signaling_emit_content_protection_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 686 adtvp_content_protection_t *content_protection) { 687 uint8_t event[22]; 688 int pos = 0; 689 event[pos++] = HCI_EVENT_AVDTP_META; 690 event[pos++] = sizeof(event) - 2; 691 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY; 692 little_endian_store_16(event, pos, avdtp_cid); 693 pos += 2; 694 event[pos++] = local_seid; 695 event[pos++] = remote_seid; 696 697 little_endian_store_16(event, pos, content_protection->cp_type); 698 pos += 2; 699 little_endian_store_16(event, pos, content_protection->cp_type_value_len); 700 pos += 2; 701 702 //TODO: reserve place for value 703 if (content_protection->cp_type_value_len < 10){ 704 (void)memcpy(event + pos, content_protection->cp_type_value, 705 content_protection->cp_type_value_len); 706 } 707 avdtp_emit_sink_and_source(event, pos); 708 } 709 710 711 static void 712 avdtp_signaling_emit_header_compression_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 713 avdtp_header_compression_capabilities_t *header_compression) { 714 uint8_t event[10]; 715 int pos = 0; 716 event[pos++] = HCI_EVENT_AVDTP_META; 717 event[pos++] = sizeof(event) - 2; 718 event[pos++] = AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY; 719 little_endian_store_16(event, pos, avdtp_cid); 720 pos += 2; 721 event[pos++] = local_seid; 722 event[pos++] = remote_seid; 723 event[pos++] = header_compression->back_ch; 724 event[pos++] = header_compression->media; 725 event[pos++] = header_compression->recovery; 726 avdtp_emit_sink_and_source(event, pos); 727 } 728 729 static void 730 avdtp_signaling_emit_content_multiplexing_capability(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, 731 avdtp_multiplexing_mode_capabilities_t *multiplexing_mode) { 732 uint8_t event[15]; 733 int pos = 0; 734 event[pos++] = HCI_EVENT_AVDTP_META; 735 event[pos++] = sizeof(event) - 2; 736 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY; 737 little_endian_store_16(event, pos, avdtp_cid); 738 pos += 2; 739 event[pos++] = local_seid; 740 event[pos++] = remote_seid; 741 742 event[pos++] = multiplexing_mode->fragmentation; 743 event[pos++] = multiplexing_mode->transport_identifiers_num; 744 745 int i; 746 for (i = 0; i < 3; i++){ 747 event[pos++] = multiplexing_mode->transport_session_identifiers[i]; 748 } 749 for (i = 0; i < 3; i++){ 750 event[pos++] = multiplexing_mode->tcid[i]; 751 } 752 avdtp_emit_sink_and_source(event, pos); 753 } 754 755 static void avdtp_signaling_emit_capability_done(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid) { 756 uint8_t event[7]; 757 int pos = 0; 758 event[pos++] = HCI_EVENT_AVDTP_META; 759 event[pos++] = sizeof(event) - 2; 760 event[pos++] = AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 761 little_endian_store_16(event, pos, avdtp_cid); 762 pos += 2; 763 event[pos++] = local_seid; 764 event[pos++] = remote_seid; 765 avdtp_emit_sink_and_source(event, pos); 766 } 767 768 // emit events for all capabilities incl. final done event 769 void avdtp_signaling_emit_capabilities(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_capabilities_t *capabilities, 770 uint16_t registered_service_categories) { 771 if (get_bit16(registered_service_categories, AVDTP_MEDIA_CODEC)){ 772 switch (capabilities->media_codec.media_codec_type){ 773 case AVDTP_CODEC_SBC: 774 avdtp_signaling_emit_media_codec_sbc_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 775 break; 776 default: 777 avdtp_signaling_emit_media_codec_other_capability(avdtp_cid, local_seid, remote_seid, capabilities->media_codec); 778 break; 779 } 780 } 781 782 if (get_bit16(registered_service_categories, AVDTP_MEDIA_TRANSPORT)){ 783 avdtp_signaling_emit_media_transport_capability(avdtp_cid, local_seid, remote_seid); 784 } 785 if (get_bit16(registered_service_categories, AVDTP_REPORTING)){ 786 avdtp_signaling_emit_reporting_capability(avdtp_cid, local_seid, remote_seid); 787 } 788 if (get_bit16(registered_service_categories, AVDTP_RECOVERY)){ 789 avdtp_signaling_emit_recovery_capability(avdtp_cid, local_seid, remote_seid, &capabilities->recovery); 790 } 791 if (get_bit16(registered_service_categories, AVDTP_CONTENT_PROTECTION)){ 792 avdtp_signaling_emit_content_protection_capability(avdtp_cid, local_seid, remote_seid, 793 &capabilities->content_protection); 794 } 795 if (get_bit16(registered_service_categories, AVDTP_HEADER_COMPRESSION)){ 796 avdtp_signaling_emit_header_compression_capability(avdtp_cid, local_seid, remote_seid, 797 &capabilities->header_compression); 798 } 799 if (get_bit16(registered_service_categories, AVDTP_MULTIPLEXING)){ 800 avdtp_signaling_emit_content_multiplexing_capability(avdtp_cid, local_seid, remote_seid, 801 &capabilities->multiplexing_mode); 802 } 803 if (get_bit16(registered_service_categories, AVDTP_DELAY_REPORTING)){ 804 avdtp_signaling_emit_delay_reporting_capability(avdtp_cid, local_seid, remote_seid); 805 } 806 avdtp_signaling_emit_capability_done(avdtp_cid, local_seid, remote_seid); 807 } 808 809 static void avdtp_signaling_emit_media_codec_sbc(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 810 avdtp_media_type_t media_type, const uint8_t *media_codec_information, 811 uint8_t reconfigure) { 812 813 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 814 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 815 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 816 817 uint8_t event[16 + 2]; 818 int pos = 0; 819 event[pos++] = HCI_EVENT_AVDTP_META; 820 event[pos++] = sizeof(event) - 2; 821 822 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 823 little_endian_store_16(event, pos, avdtp_cid); 824 pos += 2; 825 event[pos++] = local_seid; 826 event[pos++] = remote_seid; 827 event[pos++] = reconfigure; 828 829 830 uint8_t sampling_frequency_bitmap = media_codec_information[0] >> 4; 831 uint8_t channel_mode_bitmap = media_codec_information[0] & 0x0F; 832 uint8_t block_length_bitmap = media_codec_information[1] >> 4; 833 uint8_t subbands_bitmap = (media_codec_information[1] & 0x0F) >> 2; 834 835 uint8_t num_channels = 0; 836 if ((channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO) || 837 (channel_mode_bitmap & AVDTP_SBC_STEREO) || 838 (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL)) { 839 num_channels = 2; 840 } else if (channel_mode_bitmap & AVDTP_SBC_MONO) { 841 num_channels = 1; 842 } 843 844 uint16_t sampling_frequency = 0; 845 if (sampling_frequency_bitmap & AVDTP_SBC_48000) { 846 sampling_frequency = 48000; 847 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100) { 848 sampling_frequency = 44100; 849 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000) { 850 sampling_frequency = 32000; 851 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000) { 852 sampling_frequency = 16000; 853 } 854 855 uint8_t subbands = 0; 856 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 857 subbands = 8; 858 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 859 subbands = 4; 860 } 861 862 uint8_t block_length = 0; 863 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 864 block_length = 16; 865 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 866 block_length = 12; 867 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 868 block_length = 8; 869 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 870 block_length = 4; 871 } 872 873 event[pos++] = media_type; 874 little_endian_store_16(event, pos, sampling_frequency); 875 pos += 2; 876 877 event[pos++] = channel_mode_bitmap; 878 event[pos++] = num_channels; 879 event[pos++] = block_length; 880 event[pos++] = subbands; 881 event[pos++] = media_codec_information[1] & 0x03; 882 event[pos++] = media_codec_information[2]; 883 event[pos++] = media_codec_information[3]; 884 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 885 } 886 887 static void avdtp_signaling_emit_media_codec_other(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 888 adtvp_media_codec_capabilities_t * media_codec, uint8_t reconfigure) { 889 890 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 891 uint8_t local_seid = avdtp_local_seid(stream_endpoint); 892 uint8_t remote_seid = avdtp_remote_seid(stream_endpoint); 893 894 uint8_t event[MAX_MEDIA_CODEC_INFORMATION_LENGTH + 13]; 895 int pos = 0; 896 event[pos++] = HCI_EVENT_AVDTP_META; 897 event[pos++] = sizeof(event) - 2; 898 event[pos++] = AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 899 little_endian_store_16(event, pos, avdtp_cid); 900 pos += 2; 901 event[pos++] = local_seid; 902 event[pos++] = remote_seid; 903 event[pos++] = reconfigure; 904 event[pos++] = media_codec->media_type; 905 little_endian_store_16(event, pos, media_codec->media_codec_type); 906 pos += 2; 907 little_endian_store_16(event, pos, media_codec->media_codec_information_len); 908 pos += 2; 909 910 int media_codec_len = btstack_min(MAX_MEDIA_CODEC_INFORMATION_LENGTH, media_codec->media_codec_information_len); 911 (void)memcpy(event + pos, media_codec->media_codec_information, media_codec_len); 912 913 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 914 } 915 916 void avdtp_signaling_emit_delay(uint16_t avdtp_cid, uint8_t local_seid, uint16_t delay) { 917 uint8_t event[8]; 918 int pos = 0; 919 event[pos++] = HCI_EVENT_AVDTP_META; 920 event[pos++] = sizeof(event) - 2; 921 event[pos++] = AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT; 922 little_endian_store_16(event, pos, avdtp_cid); 923 pos += 2; 924 event[pos++] = local_seid; 925 little_endian_store_16(event, pos, delay); 926 pos += 2; 927 avdtp_emit_source(event, sizeof(event)); 928 } 929 930 void avdtp_signaling_emit_media_codec_sbc_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 931 avdtp_media_type_t media_type, 932 const uint8_t *media_codec_information) { 933 avdtp_signaling_emit_media_codec_sbc(stream_endpoint, avdtp_cid, media_type, 934 media_codec_information, 0); 935 } 936 937 void avdtp_signaling_emit_media_codec_other_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 938 adtvp_media_codec_capabilities_t * media_codec) { 939 avdtp_signaling_emit_media_codec_other(stream_endpoint, avdtp_cid, media_codec, 0); 940 } 941 942 void avdtp_signaling_emit_configuration(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 943 avdtp_capabilities_t *configuration, uint16_t configured_service_categories) { 944 945 if (get_bit16(configured_service_categories, AVDTP_MEDIA_CODEC)){ 946 switch (configuration->media_codec.media_codec_type){ 947 case AVDTP_CODEC_SBC: 948 avdtp_signaling_emit_media_codec_sbc_configuration( 949 stream_endpoint, avdtp_cid, 950 configuration->media_codec.media_type, 951 configuration->media_codec.media_codec_information); 952 break; 953 default: 954 avdtp_signaling_emit_media_codec_other_configuration(stream_endpoint, avdtp_cid, 955 &configuration->media_codec); 956 break; 957 } 958 } 959 } 960 961 void avdtp_streaming_emit_connection_established(avdtp_stream_endpoint_t *stream_endpoint, uint8_t status) { 962 uint8_t event[14]; 963 int pos = 0; 964 event[pos++] = HCI_EVENT_AVDTP_META; 965 event[pos++] = sizeof(event) - 2; 966 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED; 967 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 968 pos += 2; 969 reverse_bd_addr(stream_endpoint->connection->remote_addr, &event[pos]); 970 pos += 6; 971 event[pos++] = avdtp_local_seid(stream_endpoint); 972 event[pos++] = avdtp_remote_seid(stream_endpoint); 973 event[pos++] = status; 974 975 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 976 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 977 } 978 979 void avdtp_streaming_emit_connection_released(avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, uint8_t local_seid) { 980 uint8_t event[6]; 981 int pos = 0; 982 event[pos++] = HCI_EVENT_AVDTP_META; 983 event[pos++] = sizeof(event) - 2; 984 event[pos++] = AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED; 985 little_endian_store_16(event, pos, avdtp_cid); 986 pos += 2; 987 event[pos++] = local_seid; 988 989 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 990 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 991 } 992 993 void avdtp_streaming_emit_can_send_media_packet_now(avdtp_stream_endpoint_t *stream_endpoint, uint16_t sequence_number) { 994 uint8_t event[8]; 995 int pos = 0; 996 event[pos++] = HCI_EVENT_AVDTP_META; 997 event[pos++] = sizeof(event) - 2; 998 event[pos++] = AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 999 little_endian_store_16(event, pos, stream_endpoint->connection->avdtp_cid); 1000 pos += 2; 1001 event[pos++] = avdtp_local_seid(stream_endpoint); 1002 little_endian_store_16(event, pos, sequence_number); 1003 pos += 2; 1004 1005 btstack_packet_handler_t packet_handler = avdtp_packet_handler_for_stream_endpoint(stream_endpoint); 1006 (*packet_handler)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1007 } 1008 1009 uint8_t avdtp_request_can_send_now_acceptor(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1010 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1011 connection->wait_to_send_acceptor = 1; 1012 l2cap_request_can_send_now_event(l2cap_cid); 1013 return ERROR_CODE_SUCCESS; 1014 } 1015 1016 uint8_t avdtp_request_can_send_now_initiator(avdtp_connection_t * connection, uint16_t l2cap_cid){ 1017 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1018 connection->wait_to_send_initiator = 1; 1019 l2cap_request_can_send_now_event(l2cap_cid); 1020 return ERROR_CODE_SUCCESS; 1021 } 1022 1023 uint8_t avdtp_local_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1024 if (!stream_endpoint) return 0; 1025 return stream_endpoint->sep.seid; 1026 1027 } 1028 1029 uint8_t avdtp_remote_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1030 if (!stream_endpoint) return AVDTP_INVALID_SEP_SEID; 1031 return stream_endpoint->remote_sep.seid; 1032 } 1033 1034 // helper for A2DP 1035 1036 void a2dp_replace_subevent_id_and_emit_cmd(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t subevent_id){ 1037 UNUSED(size); 1038 btstack_assert(callback != NULL); 1039 packet[0] = HCI_EVENT_A2DP_META; 1040 packet[2] = subevent_id; 1041 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1042 } 1043 1044 void a2dp_emit_streaming_connection_established(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t status){ 1045 btstack_assert(callback != NULL); 1046 packet[0] = HCI_EVENT_A2DP_META; 1047 packet[2] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 1048 packet[12] = status; 1049 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1050 } 1051 1052 void a2dp_emit_signaling_connection_established(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size, uint8_t status){ 1053 btstack_assert(callback != NULL); 1054 packet[0] = HCI_EVENT_A2DP_META; 1055 packet[2] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 1056 packet[10] = status; 1057 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 1058 } 1059 1060 void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t subevent_id){ 1061 uint8_t event[6]; 1062 int pos = 0; 1063 event[pos++] = HCI_EVENT_A2DP_META; 1064 event[pos++] = sizeof(event) - 2; 1065 event[pos++] = subevent_id; 1066 little_endian_store_16(event, pos, cid); 1067 pos += 2; 1068 event[pos++] = local_seid; 1069 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 1070 } 1071