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