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