1 /* 2 * Copyright (C) 2022 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__ "le_audio_broadcast_assistant.c" 39 40 /* 41 * LE Audio Broadcast Assistant 42 */ 43 44 45 #include "btstack_config.h" 46 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <inttypes.h> 52 53 #include "ad_parser.h" 54 #include "ble/gatt-service/broadcast_audio_scan_service_client.h" 55 #include "ble/sm.h" 56 #include "bluetooth_data_types.h" 57 #include "bluetooth_gatt.h" 58 #include "btstack_audio.h" 59 #include "btstack_event.h" 60 #include "btstack_lc3.h" 61 #include "btstack_run_loop.h" 62 #include "btstack_stdin.h" 63 #include "btstack_util.h" 64 #include "gap.h" 65 #include "hci.h" 66 #include "l2cap.h" 67 68 static void show_usage(void); 69 70 static enum { 71 APP_W4_WORKING, 72 APP_W4_BROADCAST_SINK_AND_SCAN_DELEGATOR_ADV, 73 APP_W4_PA_AND_BIG_INFO, 74 APP_W4_BIG_SYNC_ESTABLISHED, 75 APP_W4_SCAN_DELEGATOR_CONNECTION, 76 APP_IDLE 77 } app_state = APP_W4_WORKING; 78 79 // 80 static btstack_packet_callback_registration_t hci_event_callback_registration; 81 static btstack_packet_callback_registration_t sm_event_callback_registration; 82 83 static bool have_scan_delegator; 84 static bool have_broadcast_source; 85 static bool have_base; 86 static bool have_big_info; 87 static bool manual_mode; 88 89 // broadcast sink info 90 static char broadcast_source_name[20]; 91 static bd_addr_t broadcast_source; 92 static bd_addr_type_t broadcast_source_type; 93 static uint8_t broadcast_source_sid; 94 static uint32_t broadcast_id; 95 static uint16_t broadcast_source_pa_interval; 96 97 // broadcast info 98 static hci_con_handle_t sync_handle; 99 static uint8_t encryption; 100 static uint8_t broadcast_code [] = {0x01, 0x02, 0x68, 0x05, 0x53, 0xF1, 0x41, 0x5A, 0xA2, 0x65, 0xBB, 0xAF, 0xC6, 0xEA, 0x03, 0xB8, }; 101 static uint8_t num_bis; 102 static uint32_t sampling_frequency_hz; 103 static btstack_lc3_frame_duration_t frame_duration; 104 static uint16_t octets_per_frame; 105 106 // scan delegator info 107 static char scan_delegator_name[20]; 108 static bd_addr_t scan_delegator; 109 static bd_addr_type_t scan_delegator_type; 110 static hci_con_handle_t scan_delegator_handle; 111 112 // BASS 113 #define BASS_CLIENT_NUM_SOURCES 1 114 static bass_client_connection_t bass_connection; 115 static bass_client_source_t bass_sources[BASS_CLIENT_NUM_SOURCES]; 116 static bass_source_data_t bass_source_new; 117 static uint16_t bass_cid; 118 static uint8_t bass_source_id; 119 120 static void handle_periodic_advertisement(const uint8_t * packet, uint16_t size){ 121 122 // periodic advertisement contains the BASE 123 // TODO: BASE might be split across multiple advertisements 124 const uint8_t * adv_data = hci_subevent_le_periodic_advertising_report_get_data(packet); 125 uint16_t adv_size = hci_subevent_le_periodic_advertising_report_get_data_length(packet); 126 uint8_t adv_status = hci_subevent_le_periodic_advertising_report_get_data_status(packet); 127 128 if (adv_status != 0) { 129 printf("Periodic Advertisement (status %u): ", adv_status); 130 printf_hexdump(adv_data, adv_size); 131 return; 132 } 133 134 ad_context_t context; 135 for (ad_iterator_init(&context, adv_size, adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 136 uint8_t data_type = ad_iterator_get_data_type(&context); 137 // TODO: avoid out-of-bounds read 138 // uint8_t data_size = ad_iterator_get_data_len(&context); 139 const uint8_t * data = ad_iterator_get_data(&context); 140 uint16_t uuid; 141 switch (data_type){ 142 case BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID: 143 uuid = little_endian_read_16(data, 0); 144 if (uuid == ORG_BLUETOOTH_SERVICE_BASIC_AUDIO_ANNOUNCEMENT_SERVICE){ 145 have_base = true; 146 // Level 1: Group Level 147 const uint8_t * base_data = &data[2]; 148 // TODO: avoid out-of-bounds read 149 // uint16_t base_len = data_size - 2; 150 printf("BASE:\n"); 151 uint32_t presentation_delay = little_endian_read_24(base_data, 0); 152 printf("- presentation delay: %"PRIu32" us\n", presentation_delay); 153 uint8_t num_subgroups = base_data[3]; 154 // Cache in new source struct 155 bass_source_new.subgroups_num = num_subgroups; 156 printf("- num subgroups: %u\n", num_subgroups); 157 uint8_t i; 158 uint16_t offset = 4; 159 for (i=0;i<num_subgroups;i++){ 160 161 // Cache in new source struct 162 bass_source_new.subgroups[i].bis_sync = 0; 163 164 // Level 2: Subgroup Level 165 num_bis = base_data[offset++]; 166 printf(" - num bis[%u]: %u\n", i, num_bis); 167 // codec_id: coding format = 0x06, vendor and coded id = 0 168 offset += 5; 169 uint8_t codec_specific_configuration_length = base_data[offset++]; 170 const uint8_t * codec_specific_configuration = &base_data[offset]; 171 printf(" - codec specific config[%u]: ", i); 172 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 173 // parse config to get sampling frequency and frame duration 174 uint8_t codec_offset = 0; 175 while ((codec_offset + 1) < codec_specific_configuration_length){ 176 uint8_t ltv_len = codec_specific_configuration[codec_offset++]; 177 uint8_t ltv_type = codec_specific_configuration[codec_offset]; 178 const uint32_t sampling_frequency_map[] = { 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 384000 }; 179 uint8_t sampling_frequency_index; 180 uint8_t frame_duration_index; 181 switch (ltv_type){ 182 case 0x01: // sampling frequency 183 sampling_frequency_index = codec_specific_configuration[codec_offset+1]; 184 // TODO: check range 185 sampling_frequency_hz = sampling_frequency_map[sampling_frequency_index - 1]; 186 printf(" - sampling frequency[%u]: %u\n", i, sampling_frequency_hz); 187 break; 188 case 0x02: // 0 = 7.5, 1 = 10 ms 189 frame_duration_index = codec_specific_configuration[codec_offset+1]; 190 frame_duration = (frame_duration_index == 0) ? BTSTACK_LC3_FRAME_DURATION_7500US : BTSTACK_LC3_FRAME_DURATION_10000US; 191 printf(" - frame duration[%u]: %s ms\n", i, (frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US) ? "7.5" : "10"); 192 break; 193 case 0x04: // octets per coding frame 194 octets_per_frame = little_endian_read_16(codec_specific_configuration, codec_offset+1); 195 printf(" - octets per codec frame[%u]: %u\n", i, octets_per_frame); 196 break; 197 default: 198 break; 199 } 200 codec_offset += ltv_len; 201 } 202 // 203 offset += codec_specific_configuration_length; 204 uint8_t metadata_length = base_data[offset++]; 205 const uint8_t * meta_data = &base_data[offset]; 206 offset += metadata_length; 207 printf(" - meta data[%u]: ", i); 208 printf_hexdump(meta_data, metadata_length); 209 uint8_t k; 210 for (k=0;k<num_bis;k++){ 211 // Level 3: BIS Level 212 uint8_t bis_index = base_data[offset++]; 213 214 // check value 215 // double check message 216 217 // Cache in new source struct 218 bass_source_new.subgroups[i].bis_sync_state |= 1 << (bis_index-1); 219 bass_source_new.subgroups[i].metadata_length = 0; 220 memset(&bass_source_new.subgroups[i].metadata, 0, sizeof(le_audio_metadata_t)); 221 222 printf(" - bis index[%u][%u]: %u\n", i, k, bis_index); 223 uint8_t codec_specific_configuration_length2 = base_data[offset++]; 224 const uint8_t * codec_specific_configuration2 = &base_data[offset]; 225 printf(" - codec specific config[%u][%u]: ", i, k); 226 printf_hexdump(codec_specific_configuration2, codec_specific_configuration_length2); 227 offset += codec_specific_configuration_length2; 228 } 229 } 230 } 231 break; 232 default: 233 break; 234 } 235 } 236 } 237 238 static void start_scanning() { 239 app_state = APP_W4_BROADCAST_SINK_AND_SCAN_DELEGATOR_ADV; 240 have_base = false; 241 have_big_info = false; 242 gap_set_scan_params(1, 0x30, 0x30, 0); 243 gap_start_scan(); 244 printf("Start scan..\n"); 245 } 246 247 static void have_base_and_big_info(void){ 248 printf("Connecting to Scan Delegator/Sink!\n"); 249 250 // todo: connect to scan delegator 251 app_state = APP_W4_SCAN_DELEGATOR_CONNECTION; 252 gap_connect(scan_delegator, scan_delegator_type); 253 } 254 255 static void handle_big_info(const uint8_t * packet, uint16_t size){ 256 printf("BIG Info advertising report\n"); 257 sync_handle = hci_subevent_le_biginfo_advertising_report_get_sync_handle(packet); 258 encryption = hci_subevent_le_biginfo_advertising_report_get_encryption(packet); 259 if (encryption) { 260 printf("Stream is encrypted\n"); 261 } 262 have_big_info = true; 263 } 264 265 static void add_source() {// setup bass source info 266 printf("BASS Client: add source\n"); 267 268 bass_source_new.address_type = broadcast_source_type; 269 memcpy(bass_source_new.address, broadcast_source, 6); 270 bass_source_new.adv_sid = broadcast_source_sid; 271 bass_source_new.broadcast_id = broadcast_id; 272 bass_source_new.pa_sync = LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE; 273 bass_source_new.pa_interval = broadcast_source_pa_interval; 274 // bass_source_new.subgroups_num set in BASE parser 275 // bass_source_new.subgroup[i].* set in BASE parser 276 277 // add bass source 278 broadcast_audio_scan_service_client_add_source(bass_cid, &bass_source_new); 279 } 280 281 static void bass_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 282 UNUSED(channel); 283 UNUSED(size); 284 285 if (packet_type != HCI_EVENT_PACKET) return; 286 if (hci_event_packet_get_type(packet) != HCI_EVENT_GATTSERVICE_META) return; 287 288 switch (hci_event_gattservice_meta_get_subevent_code(packet)) { 289 case GATTSERVICE_SUBEVENT_BASS_CONNECTED: 290 if (gattservice_subevent_bass_connected_get_status(packet) != ERROR_CODE_SUCCESS){ 291 printf("BASS client connection failed, cid 0x%02x, con_handle 0x%02x, status 0x%02x\n", 292 bass_cid, scan_delegator_handle, 293 gattservice_subevent_bass_connected_get_status(packet)); 294 return; 295 } 296 printf("BASS client connected, cid 0x%02x\n", bass_cid); 297 298 if ((have_big_info == false) || (have_base == false)) break; 299 if (manual_mode) return; 300 add_source(); 301 302 break; 303 case GATTSERVICE_SUBEVENT_BASS_SOURCE_OPERATION_COMPLETE: 304 if (gattservice_subevent_bass_source_operation_complete_get_status(packet) != ERROR_CODE_SUCCESS){ 305 printf("BASS client source operation failed, status 0x%02x\n", gattservice_subevent_bass_source_operation_complete_get_status(packet)); 306 return; 307 } 308 309 if ( gattservice_subevent_bass_source_operation_complete_get_opcode(packet) == (uint8_t)BASS_OPCODE_ADD_SOURCE ){ 310 // TODO: set state to 'wait for source_id" 311 printf("BASS client add source operation completed, wait for source_id\n"); 312 } 313 break; 314 case GATTSERVICE_SUBEVENT_BASS_NOTIFICATION_COMPLETE: 315 // store source_id 316 bass_source_id = gattservice_subevent_bass_notification_complete_get_source_id(packet); 317 printf("BASS client notification, source_id = 0x%02x\n", bass_source_id); 318 319 // note: should be pa_sync_state field 320 if (bass_sources[0].data.pa_sync == LE_AUDIO_PA_SYNC_STATE_SYNCINFO_REQUEST){ 321 // start pa sync 322 printf("LE_AUDIO_PA_SYNC_STATE_SYNCINFO_REQUEST -> Start PAST\n"); 323 uint16_t service_data = 0x100; // bass_source_id; 324 gap_periodic_advertising_sync_transfer_send(scan_delegator_handle, service_data, sync_handle); 325 } 326 break; 327 default: 328 break; 329 } 330 } 331 332 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 333 UNUSED(channel); 334 if (packet_type != HCI_EVENT_PACKET) return; 335 switch (packet[0]) { 336 case BTSTACK_EVENT_STATE: 337 switch(btstack_event_state_get_state(packet)) { 338 case HCI_STATE_WORKING: 339 app_state = APP_IDLE; 340 #ifdef ENABLE_DEMO_MODE 341 start_scanning(); 342 #else 343 show_usage(); 344 #endif 345 break; 346 case HCI_STATE_OFF: 347 printf("Goodbye\n"); 348 exit(0); 349 break; 350 default: 351 break; 352 } 353 break; 354 case GAP_EVENT_EXTENDED_ADVERTISING_REPORT: 355 { 356 if (app_state != APP_W4_BROADCAST_SINK_AND_SCAN_DELEGATOR_ADV) break; 357 358 uint8_t adv_size = gap_event_extended_advertising_report_get_data_length(packet); 359 const uint8_t * adv_data = gap_event_extended_advertising_report_get_data(packet); 360 361 ad_context_t context; 362 bool found_scan_delegator = false; 363 bool found_broadcast_source = false; 364 bool found_name = false; 365 uint8_t adv_name[31]; 366 367 uint16_t uuid; 368 for (ad_iterator_init(&context, adv_size, adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 369 uint8_t data_type = ad_iterator_get_data_type(&context); 370 uint8_t size = ad_iterator_get_data_len(&context); 371 const uint8_t *data = ad_iterator_get_data(&context); 372 switch (data_type){ 373 case BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID: 374 uuid = little_endian_read_16(data, 0); 375 switch (uuid){ 376 case ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_ANNOUNCEMENT_SERVICE: 377 broadcast_id = little_endian_read_24(data, 2); 378 found_broadcast_source = true; 379 break; 380 case ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE: 381 found_scan_delegator = true; 382 break; 383 default: 384 break; 385 } 386 break; 387 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 388 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 389 size = btstack_min(sizeof(adv_name) - 1, size); 390 memcpy(adv_name, data, size); 391 adv_name[size] = 0; 392 found_name = true; 393 break; 394 default: 395 break; 396 } 397 } 398 399 if ((found_scan_delegator == false) && (found_broadcast_source == false)) break; 400 401 if ((have_scan_delegator == false) && found_scan_delegator){ 402 have_scan_delegator = true; 403 gap_event_extended_advertising_report_get_address(packet, scan_delegator); 404 scan_delegator_type = gap_event_extended_advertising_report_get_address_type(packet); 405 if (found_name){ 406 btstack_strcpy(scan_delegator_name, sizeof(scan_delegator_name), (const char *) adv_name); 407 } else { 408 scan_delegator_name[0] = 0; 409 } 410 printf("Broadcast sink found, addr %s, name: '%s'\n", bd_addr_to_str(scan_delegator), scan_delegator_name); 411 gap_whitelist_add(scan_delegator_type, scan_delegator); 412 } 413 414 if ((have_broadcast_source == false) && found_broadcast_source){ 415 have_broadcast_source = true; 416 gap_event_extended_advertising_report_get_address(packet, broadcast_source); 417 broadcast_source_type = gap_event_extended_advertising_report_get_address_type(packet); 418 broadcast_source_sid = gap_event_extended_advertising_report_get_advertising_sid(packet); 419 if (found_name){ 420 btstack_strcpy(broadcast_source_name, sizeof(broadcast_source_name), (const char *) adv_name); 421 } else { 422 broadcast_source_name[0] = 0; 423 } 424 printf("Broadcast source found, addr %s, name: '%s'\n", bd_addr_to_str(broadcast_source), broadcast_source_name); 425 gap_whitelist_add(broadcast_source_type, broadcast_source); 426 } 427 428 if ((have_broadcast_source && have_scan_delegator) == false) break; 429 430 printf("Start Periodic Advertising Sync\n"); 431 432 // ignore other advertisements 433 gap_set_scan_params(1, 0x30, 0x30, 1); 434 // sync to PA 435 gap_periodic_advertiser_list_clear(); 436 gap_periodic_advertiser_list_add(broadcast_source_type, broadcast_source, broadcast_source_sid); 437 app_state = APP_W4_PA_AND_BIG_INFO; 438 gap_periodic_advertising_create_sync(0x01, broadcast_source_sid, broadcast_source_type, broadcast_source, 0, 1000, 0); 439 break; 440 } 441 442 case HCI_EVENT_LE_META: 443 switch(hci_event_le_meta_get_subevent_code(packet)) { 444 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 445 sync_handle = hci_subevent_le_periodic_advertising_sync_establishment_get_sync_handle(packet); 446 broadcast_source_pa_interval = hci_subevent_le_periodic_advertising_sync_establishment_get_periodic_advertising_interval(packet); 447 printf("Periodic advertising sync with handle 0x%04x established\n", sync_handle); 448 break; 449 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_REPORT: 450 if (have_base) break; 451 handle_periodic_advertisement(packet, size); 452 if (have_base & have_big_info){ 453 have_base_and_big_info(); 454 } 455 break; 456 case HCI_SUBEVENT_LE_BIGINFO_ADVERTISING_REPORT: 457 if (have_big_info) break; 458 handle_big_info(packet, size); 459 if (have_base & have_big_info){ 460 have_base_and_big_info(); 461 } 462 break; 463 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 464 printf("BIG Sync Lost\n"); 465 { 466 const btstack_audio_sink_t * sink = btstack_audio_sink_get_instance(); 467 if (sink != NULL) { 468 sink->stop_stream(); 469 sink->close(); 470 } 471 } 472 // start over 473 start_scanning(); 474 break; 475 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 476 if (hci_subevent_le_connection_complete_get_status(packet) != ERROR_CODE_SUCCESS) break; 477 scan_delegator_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 478 printf("Connection complete, handle 0x%04x\n", scan_delegator_handle); 479 broadcast_audio_scan_service_client_connect(&bass_connection, 480 bass_sources, 481 BASS_CLIENT_NUM_SOURCES, 482 scan_delegator_handle, 483 &bass_cid); 484 break; 485 default: 486 break; 487 } 488 break; 489 case SM_EVENT_JUST_WORKS_REQUEST: 490 printf("Just Works requested\n"); 491 sm_just_works_confirm(sm_event_just_works_request_get_handle(packet)); 492 break; 493 default: 494 break; 495 } 496 } 497 498 static void show_usage(void){ 499 printf("\n--- LE Audio Broadcast Assistant Test Console ---\n"); 500 printf("s - setup LE Broadcast Sink with Broadcast Source via Scan Delegator\n"); 501 printf("c - scan and connect to Scan Delegator\n"); 502 printf("a - add source\n"); 503 printf("m - modify source to PA Sync = 0, bis sync = 0\n"); 504 printf("b - send Broadcast Code: "); 505 printf_hexdump(broadcast_code, sizeof(broadcast_code)); 506 printf("r - remove source\n"); 507 printf("---\n"); 508 } 509 510 static void stdin_process(char c){ 511 switch (c){ 512 case 's': 513 if (app_state != APP_IDLE) break; 514 manual_mode = false; 515 start_scanning(); 516 break; 517 case 'c': 518 manual_mode = true; 519 start_scanning(); 520 break; 521 case 'a': 522 add_source(); 523 break; 524 case 'm': 525 memcpy(&bass_source_new, &bass_sources[0].data, sizeof(bass_source_data_t)); 526 bass_source_new.pa_sync = LE_AUDIO_PA_SYNC_DO_NOT_SYNCHRONIZE_TO_PA; 527 bass_source_new.subgroups[0].bis_sync_state = 0; 528 broadcast_audio_scan_service_client_modify_source(bass_cid, bass_source_id, &bass_source_new); 529 break; 530 case 'r': 531 broadcast_audio_scan_service_client_delete_source(bass_cid, bass_source_id); 532 break; 533 case 'b': 534 // send broadcast code 535 broadcast_audio_scan_service_client_set_broadcast_code(bass_cid, bass_source_id, &broadcast_code); 536 break; 537 case '\n': 538 case '\r': 539 break; 540 default: 541 show_usage(); 542 break; 543 544 } 545 } 546 547 int btstack_main(int argc, const char * argv[]); 548 int btstack_main(int argc, const char * argv[]){ 549 (void) argv; 550 (void) argc; 551 552 l2cap_init(); 553 sm_init(); 554 gatt_client_init(); 555 556 // register for HCI events 557 hci_event_callback_registration.callback = &packet_handler; 558 hci_add_event_handler(&hci_event_callback_registration); 559 560 // register for SM events 561 sm_event_callback_registration.callback = &packet_handler; 562 sm_add_event_handler(&sm_event_callback_registration); 563 564 broadcast_audio_scan_service_client_init(&bass_packet_handler); 565 566 // turn on! 567 hci_power_control(HCI_POWER_ON); 568 569 btstack_stdin_setup(stdin_process); 570 return 0; 571 } 572