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/sm.h" 55 #include "bluetooth_data_types.h" 56 #include "bluetooth_gatt.h" 57 #include "btstack_audio.h" 58 #include "btstack_debug.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 #include "le-audio/gatt-service/broadcast_audio_scan_service_client.h" 68 #include "le-audio/le_audio_util.h" 69 #include "le-audio/le_audio_base_parser.h" 70 71 static void show_usage(void); 72 73 static enum { 74 APP_W4_WORKING, 75 APP_IDLE, 76 APP_W4_SCAN_DELEGATOR_CONNECTION, 77 APP_CONNECTED, 78 APP_W4_SCAN_BROADCAST_SOURCES, 79 APP_W4_PA_AND_BIG_INFO, 80 APP_W4_BIG_SYNC_ESTABLISHED, 81 } app_state = APP_W4_WORKING; 82 83 // 84 static btstack_packet_callback_registration_t hci_event_callback_registration; 85 static btstack_packet_callback_registration_t sm_event_callback_registration; 86 87 static bool have_scan_delegator; 88 static bool have_broadcast_source; 89 static bool have_base; 90 static bool have_big_info; 91 static bool manual_mode; 92 static bool scan_for_scan_delegator; 93 static bool scan_for_broadcast_source; 94 static uint16_t broadcast_source_scan_duration_s = 10; 95 96 // broadcast sink info 97 #define NUM_BROADCAST_SOURCES 5 98 #define BROADCAST_SOURCE_NAME_LEN 20 99 struct { 100 char name[BROADCAST_SOURCE_NAME_LEN]; 101 bd_addr_t addr; 102 bd_addr_type_t addr_type; 103 uint8_t sid; 104 uint32_t broadcast_id; 105 uint16_t pa_interval; 106 } broadcast_sources[NUM_BROADCAST_SOURCES]; 107 static uint8_t broadcast_source_current = 0; 108 static uint8_t broadcast_source_count = 0; 109 static btstack_timer_source_t broadcast_source_scan_timer; 110 static bool broadcast_source_synced; 111 112 // broadcast info 113 static hci_con_handle_t sync_handle; 114 static uint8_t encryption; 115 static uint8_t broadcast_code [] = {0x01, 0x02, 0x68, 0x05, 0x53, 0xF1, 0x41, 0x5A, 0xA2, 0x65, 0xBB, 0xAF, 0xC6, 0xEA, 0x03, 0xB8, }; 116 static uint8_t num_bis; 117 static uint32_t bis_sync_mask; 118 static uint32_t sampling_frequency_hz; 119 static btstack_lc3_frame_duration_t frame_duration; 120 static uint16_t octets_per_frame; 121 122 // scan delegator info 123 static char scan_delegator_name[20]; 124 static bd_addr_t scan_delegator; 125 static bd_addr_type_t scan_delegator_type; 126 static hci_con_handle_t scan_delegator_handle; 127 128 // BASS 129 #define BASS_CLIENT_NUM_SOURCES 1 130 static bass_client_connection_t bass_connection; 131 static bass_client_source_t bass_sources[BASS_CLIENT_NUM_SOURCES]; 132 static bass_source_data_t bass_source_data; 133 static uint16_t bass_cid; 134 static uint8_t bass_source_id; 135 136 // test device name 137 static const char test_device_name[] = "OnePlus Buds Pro 2"; 138 139 /* Scanning */ 140 141 static void start_scanning() { 142 have_base = false; 143 have_big_info = false; 144 gap_set_scan_params(1, 0x30, 0x30, 0); 145 gap_start_scan(); 146 printf("Start scan..\n"); 147 } 148 149 static void stop_scanning() { 150 gap_stop_scan(); 151 app_state = APP_CONNECTED; 152 } 153 154 static void broadcast_source_scan_timeout_handler(btstack_timer_source_t * ts) { 155 stop_scanning(); 156 printf("Scanning done, found %u Broadcast Sources\n", broadcast_source_count); 157 } 158 159 /* Scan Delegator */ 160 161 static void connect_to_scan_delegator(void) { 162 printf("Connect to Scan Delegator %s type %u - %s", bd_addr_to_str(scan_delegator), scan_delegator_type, scan_delegator_name); 163 app_state = APP_W4_SCAN_DELEGATOR_CONNECTION; 164 gap_connect(scan_delegator, scan_delegator_type); 165 } 166 167 static void 168 le_audio_broadcast_assistant_found_scan_delegator(bd_addr_type_t *addr_type, const uint8_t *addr, 169 const char *adv_name) { 170 memcpy(scan_delegator, addr, 6); 171 scan_delegator_type = (*addr_type); 172 btstack_strcpy(scan_delegator_name, sizeof(scan_delegator_name), (const char *) adv_name); 173 printf("Broadcast sink found, addr %s, name: '%s'\n", bd_addr_to_str(scan_delegator), scan_delegator_name); 174 gap_whitelist_add(scan_delegator_type, scan_delegator); 175 176 if (manual_mode == true) { 177 stop_scanning(); 178 connect_to_scan_delegator(); 179 } 180 } 181 182 /* Broadcast Sources */ 183 184 static void le_audio_broadcast_assistant_start_periodic_sync() { 185 printf("Start Periodic Advertising Sync\n"); 186 187 // ignore other advertisements 188 gap_set_scan_params(1, 0x30, 0x30, 1); 189 // sync to PA 190 gap_periodic_advertiser_list_clear(); 191 gap_periodic_advertiser_list_add(broadcast_sources[broadcast_source_current].addr_type, broadcast_sources[broadcast_source_current].addr, broadcast_sources[broadcast_source_current].sid); 192 app_state = APP_W4_PA_AND_BIG_INFO; 193 gap_periodic_advertising_create_sync(0x01, broadcast_sources[broadcast_source_current].sid, broadcast_sources[broadcast_source_current].addr_type, broadcast_sources[broadcast_source_current].addr, 0, 1000, 0); 194 } 195 196 static void handle_periodic_advertisement(const uint8_t * packet, uint16_t size){ 197 198 // periodic advertisement contains the BASE 199 // TODO: BASE might be split across multiple advertisements 200 const uint8_t * adv_data = hci_subevent_le_periodic_advertising_report_get_data(packet); 201 uint16_t adv_size = hci_subevent_le_periodic_advertising_report_get_data_length(packet); 202 uint8_t adv_status = hci_subevent_le_periodic_advertising_report_get_data_status(packet); 203 204 if (adv_status != 0) { 205 printf("Periodic Advertisement (status %u): ", adv_status); 206 printf_hexdump(adv_data, adv_size); 207 return; 208 } 209 210 le_audio_base_parser_t parser; 211 bool ok = le_audio_base_parser_init(&parser, adv_data, adv_size); 212 if (ok == false){ 213 return; 214 } 215 have_base = true; 216 217 printf("BASE:\n"); 218 uint32_t presentation_delay = le_audio_base_parser_get_presentation_delay(&parser); 219 printf("- presentation delay: %"PRIu32" us\n", presentation_delay); 220 uint8_t num_subgroups = le_audio_base_parser_get_num_subgroups(&parser); 221 // Cache in new source struct 222 bass_source_data.subgroups_num = num_subgroups; 223 printf("- num subgroups: %u\n", num_subgroups); 224 uint8_t i; 225 for (i=0;i<num_subgroups;i++){ 226 227 // Cache in new source struct 228 bass_source_data.subgroups[i].bis_sync = 0; 229 230 // Level 2: Subgroup Level 231 num_bis = le_audio_base_parser_subgroup_get_num_bis(&parser); 232 printf(" - num bis[%u]: %u\n", i, num_bis); 233 uint8_t codec_specific_configuration_length = le_audio_base_parser_bis_get_codec_specific_configuration_length(&parser); 234 const uint8_t * codec_specific_configuration = le_audio_base_parser_subgroup_get_codec_specific_configuration(&parser); 235 printf(" - codec specific config[%u]: ", i); 236 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 237 // parse config to get sampling frequency and frame duration 238 uint8_t codec_offset = 0; 239 while ((codec_offset + 1) < codec_specific_configuration_length){ 240 uint8_t ltv_len = codec_specific_configuration[codec_offset++]; 241 uint8_t ltv_type = codec_specific_configuration[codec_offset]; 242 const uint32_t sampling_frequency_map[] = { 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 384000 }; 243 uint8_t sampling_frequency_index; 244 uint8_t frame_duration_index; 245 switch (ltv_type){ 246 case 0x01: // sampling frequency 247 sampling_frequency_index = codec_specific_configuration[codec_offset+1]; 248 // TODO: check range 249 sampling_frequency_hz = sampling_frequency_map[sampling_frequency_index - 1]; 250 printf(" - sampling frequency[%u]: %u\n", i, sampling_frequency_hz); 251 break; 252 case 0x02: // 0 = 7.5, 1 = 10 ms 253 frame_duration_index = codec_specific_configuration[codec_offset+1]; 254 frame_duration = le_audio_util_get_btstack_lc3_frame_duration(frame_duration_index); 255 printf(" - frame duration[%u]: %u us\n", i, le_audio_get_frame_duration_us(frame_duration_index)); 256 break; 257 case 0x04: // octets per coding frame 258 octets_per_frame = little_endian_read_16(codec_specific_configuration, codec_offset+1); 259 printf(" - octets per codec frame[%u]: %u\n", i, octets_per_frame); 260 break; 261 default: 262 break; 263 } 264 codec_offset += ltv_len; 265 } 266 uint8_t metadata_length = le_audio_base_parser_subgroup_get_metadata_length(&parser); 267 const uint8_t * meta_data = le_audio_base_subgroup_parser_get_metadata(&parser); 268 printf(" - meta data[%u]: ", i); 269 printf_hexdump(meta_data, metadata_length); 270 uint8_t k; 271 for (k=0;k<num_bis;k++){ 272 // Level 3: BIS Level 273 uint8_t bis_index = le_audio_base_parser_bis_get_index(&parser); 274 275 // check value 276 // double check message 277 278 // Cache in new source struct 279 bis_sync_mask |= 1 << (bis_index-1); 280 281 bass_source_data.subgroups[i].metadata_length = 0; 282 memset(&bass_source_data.subgroups[i].metadata, 0, sizeof(le_audio_metadata_t)); 283 284 printf(" - bis index[%u][%u]: %u\n", i, k, bis_index); 285 codec_specific_configuration_length = le_audio_base_parser_bis_get_codec_specific_configuration_length(&parser); 286 codec_specific_configuration = le_audio_base_bis_parser_get_codec_specific_configuration(&parser); 287 printf(" - codec specific config[%u][%u]: ", i, k); 288 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 289 290 // parse next BIS 291 le_audio_base_parser_bis_next(&parser); 292 } 293 294 // parse next subgroup 295 le_audio_base_parser_subgroup_next(&parser); 296 } 297 } 298 299 static void have_base_and_big_info(void){ 300 printf("Connecting to Scan Delegator/Sink!\n"); 301 stop_scanning(); 302 connect_to_scan_delegator(); 303 } 304 305 static void handle_big_info(const uint8_t * packet, uint16_t size){ 306 printf("BIG Info advertising report\n"); 307 sync_handle = hci_subevent_le_biginfo_advertising_report_get_sync_handle(packet); 308 encryption = hci_subevent_le_biginfo_advertising_report_get_encryption(packet); 309 if (encryption) { 310 printf("Stream is encrypted\n"); 311 } 312 have_big_info = true; 313 } 314 315 static void add_source() { 316 // setup bass source info 317 printf("BASS Client: add source with BIS Sync 0x%04x\n", bass_source_data.subgroups[0].bis_sync_state); 318 bass_source_data.address_type = broadcast_sources[broadcast_source_current].addr_type; 319 memcpy(bass_source_data.address, broadcast_sources[broadcast_source_current].addr, 6); 320 bass_source_data.adv_sid = broadcast_sources[broadcast_source_current].sid; 321 bass_source_data.broadcast_id = broadcast_sources[broadcast_source_current].broadcast_id; 322 bass_source_data.pa_sync = broadcast_source_synced ? LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE : LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_NOT_AVAILABLE; 323 bass_source_data.pa_interval = broadcast_sources[broadcast_source_current].pa_interval; 324 // bass_source_new.subgroups_num set in BASE parser 325 // bass_source_new.subgroup[i].* set in BASE parser 326 327 // add bass source 328 broadcast_audio_scan_service_client_add_source(bass_cid, &bass_source_data); 329 } 330 331 /* Packet Handlers */ 332 333 static void bass_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 334 UNUSED(channel); 335 UNUSED(size); 336 337 if (packet_type != HCI_EVENT_PACKET) return; 338 if (hci_event_packet_get_type(packet) != HCI_EVENT_GATTSERVICE_META) return; 339 340 const bass_source_data_t * source_data; 341 342 switch (hci_event_gattservice_meta_get_subevent_code(packet)) { 343 case GATTSERVICE_SUBEVENT_BASS_CLIENT_CONNECTED: 344 if (gattservice_subevent_bass_client_connected_get_status(packet) != ERROR_CODE_SUCCESS){ 345 printf("BASS client connection failed, cid 0x%02x, con_handle 0x%02x, status 0x%02x\n", 346 bass_cid, scan_delegator_handle, 347 gattservice_subevent_bass_client_connected_get_status(packet)); 348 return; 349 } 350 printf("BASS client connected, cid 0x%02x\n", bass_cid); 351 app_state = APP_CONNECTED; 352 break; 353 case GATTSERVICE_SUBEVENT_BASS_CLIENT_SOURCE_OPERATION_COMPLETE: 354 if (gattservice_subevent_bass_client_source_operation_complete_get_status(packet) != ERROR_CODE_SUCCESS){ 355 printf("BASS client source operation failed, status 0x%02x\n", gattservice_subevent_bass_client_source_operation_complete_get_status(packet)); 356 break; 357 } 358 359 if ( gattservice_subevent_bass_client_source_operation_complete_get_opcode(packet) == (uint8_t)BASS_OPCODE_ADD_SOURCE ){ 360 // TODO: set state to 'wait for source_id" 361 printf("BASS client add source operation completed, wait for source_id\n"); 362 } 363 break; 364 case GATTSERVICE_SUBEVENT_BASS_CLIENT_NOTIFICATION_COMPLETE: 365 // store source_id 366 bass_source_id = gattservice_subevent_bass_client_notification_complete_get_source_id(packet); 367 printf("BASS client notification, source_id = 0x%02x\n", bass_source_id); 368 source_data = broadcast_audio_scan_service_client_get_source_data(bass_cid, bass_source_id); 369 btstack_assert(source_data != NULL); 370 371 switch (source_data->pa_sync_state){ 372 case LE_AUDIO_PA_SYNC_STATE_SYNCINFO_REQUEST: 373 // start pa sync transfer 374 printf("LE_AUDIO_PA_SYNC_STATE_SYNCINFO_REQUEST -> Start PAST\n"); 375 // TODO: unclear why this needs to be shifted for PAST with TS to get test green 376 uint16_t service_data = bass_source_id << 8; 377 gap_periodic_advertising_sync_transfer_send(scan_delegator_handle, service_data, sync_handle); 378 break; 379 default: 380 break; 381 } 382 383 // check if Broadcast Code is requested 384 if (manual_mode == false){ 385 le_audio_big_encryption_t big_encryption; 386 uint8_t bad_code[16]; 387 broadcast_audio_scan_service_client_get_encryption_state(bass_cid, bass_source_id, &big_encryption, bad_code); 388 if (big_encryption == LE_AUDIO_BIG_ENCRYPTION_BROADCAST_CODE_REQUIRED){ 389 printf("LE_AUDIO_BIG_ENCRYPTION_BROADCAST_CODE_REQUIRED -> send Broadcast Code\n"); 390 broadcast_audio_scan_service_client_set_broadcast_code(bass_cid, bass_source_id, broadcast_code); 391 } 392 } 393 break; 394 case GATTSERVICE_SUBEVENT_BASS_CLIENT_DISCONNECTED: 395 break; 396 default: 397 break; 398 } 399 } 400 401 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 402 UNUSED(channel); 403 if (packet_type != HCI_EVENT_PACKET) return; 404 switch (packet[0]) { 405 case BTSTACK_EVENT_STATE: 406 switch(btstack_event_state_get_state(packet)) { 407 case HCI_STATE_WORKING: 408 app_state = APP_IDLE; 409 #ifdef ENABLE_DEMO_MODE 410 start_scanning(); 411 #else 412 show_usage(); 413 #endif 414 break; 415 case HCI_STATE_OFF: 416 printf("Goodbye\n"); 417 exit(0); 418 break; 419 default: 420 break; 421 } 422 break; 423 case GAP_EVENT_EXTENDED_ADVERTISING_REPORT: 424 { 425 uint8_t adv_size = gap_event_extended_advertising_report_get_data_length(packet); 426 const uint8_t * adv_data = gap_event_extended_advertising_report_get_data(packet); 427 428 ad_context_t context; 429 bool found_scan_delegator = false; 430 bool found_broadcast_source = false; 431 char adv_name[31]; 432 adv_name[0] = 0; 433 434 uint16_t uuid; 435 for (ad_iterator_init(&context, adv_size, adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 436 uint8_t data_type = ad_iterator_get_data_type(&context); 437 uint8_t size = ad_iterator_get_data_len(&context); 438 const uint8_t *data = ad_iterator_get_data(&context); 439 switch (data_type){ 440 case BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID: 441 uuid = little_endian_read_16(data, 0); 442 switch (uuid){ 443 case ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_ANNOUNCEMENT_SERVICE: 444 if (scan_for_broadcast_source) { 445 broadcast_sources[broadcast_source_count].broadcast_id = little_endian_read_24(data, 2); 446 found_broadcast_source = true; 447 } 448 break; 449 case ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE: 450 if (scan_for_scan_delegator) { 451 found_scan_delegator = true; 452 } 453 break; 454 default: 455 break; 456 } 457 break; 458 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 459 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 460 size = btstack_min(sizeof(adv_name) - 1, size); 461 memcpy(adv_name, data, size); 462 adv_name[size] = 0; 463 break; 464 default: 465 break; 466 } 467 } 468 469 if ((have_scan_delegator == false) && found_scan_delegator){ 470 have_scan_delegator = true; 471 bd_addr_t addr; 472 gap_event_extended_advertising_report_get_address(packet, addr); 473 bd_addr_type_t addr_type = (bd_addr_type_t) gap_event_extended_advertising_report_get_address_type(packet); 474 le_audio_broadcast_assistant_found_scan_delegator(&addr_type, addr, adv_name); 475 } 476 477 if ((have_broadcast_source == false) && found_broadcast_source){ 478 have_broadcast_source = true; 479 gap_event_extended_advertising_report_get_address(packet, broadcast_sources[broadcast_source_count].addr); 480 broadcast_sources[broadcast_source_count].addr_type = gap_event_extended_advertising_report_get_address_type(packet); 481 broadcast_sources[broadcast_source_count].sid = gap_event_extended_advertising_report_get_advertising_sid(packet); 482 btstack_strcpy(broadcast_sources[broadcast_source_count].name, BROADCAST_SOURCE_NAME_LEN, (const char *) adv_name); 483 printf("Broadcast source found, addr %s, name: '%s'\n", bd_addr_to_str(broadcast_sources[broadcast_source_count].addr), broadcast_sources[broadcast_source_count].name); 484 gap_whitelist_add(broadcast_sources[broadcast_source_count].addr_type, broadcast_sources[broadcast_source_count].addr); 485 broadcast_source_count++; 486 } 487 488 // automatic mode 489 if (manual_mode == false) { 490 if (have_broadcast_source && have_scan_delegator) { 491 le_audio_broadcast_assistant_start_periodic_sync(); 492 } 493 } 494 break; 495 } 496 497 case HCI_EVENT_LE_META: 498 switch(hci_event_le_meta_get_subevent_code(packet)) { 499 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 500 sync_handle = hci_subevent_le_periodic_advertising_sync_establishment_get_sync_handle(packet); 501 broadcast_sources[broadcast_source_current].pa_interval = hci_subevent_le_periodic_advertising_sync_establishment_get_periodic_advertising_interval(packet); 502 printf("Periodic advertising sync with handle 0x%04x established\n", sync_handle); 503 break; 504 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_REPORT: 505 if (have_base) break; 506 handle_periodic_advertisement(packet, size); 507 if (have_base & have_big_info){ 508 have_base_and_big_info(); 509 } 510 break; 511 case HCI_SUBEVENT_LE_BIGINFO_ADVERTISING_REPORT: 512 if (have_big_info) break; 513 handle_big_info(packet, size); 514 if (have_base & have_big_info){ 515 have_base_and_big_info(); 516 } 517 break; 518 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 519 printf("BIG Sync Lost\n"); 520 { 521 const btstack_audio_sink_t * sink = btstack_audio_sink_get_instance(); 522 if (sink != NULL) { 523 sink->stop_stream(); 524 sink->close(); 525 } 526 } 527 // start over 528 start_scanning(); 529 break; 530 default: 531 break; 532 } 533 break; 534 case HCI_EVENT_META_GAP: 535 switch (hci_event_gap_meta_get_subevent_code(packet)){ 536 case GAP_SUBEVENT_LE_CONNECTION_COMPLETE: 537 if (gap_subevent_le_connection_complete_get_status(packet) != ERROR_CODE_SUCCESS) break; 538 scan_delegator_handle = gap_subevent_le_connection_complete_get_connection_handle(packet); 539 printf("Connection complete, handle 0x%04x\n", scan_delegator_handle); 540 broadcast_audio_scan_service_client_connect(&bass_connection, 541 bass_sources, 542 BASS_CLIENT_NUM_SOURCES, 543 scan_delegator_handle, 544 &bass_cid); 545 break; 546 default: 547 break; 548 } 549 break; 550 case SM_EVENT_JUST_WORKS_REQUEST: 551 printf("Just Works requested\n"); 552 sm_just_works_confirm(sm_event_just_works_request_get_handle(packet)); 553 break; 554 default: 555 break; 556 } 557 } 558 559 /* UI */ 560 561 static void show_usage(void){ 562 printf("\n--- LE Audio Broadcast Assistant Test Console ---\n"); 563 switch (app_state) { 564 case APP_IDLE: 565 // printf("s - setup LE Broadcast Sink with Broadcast Source via Scan Delegator\n"); 566 printf("c - scan and connect to Scan Delegator\n"); 567 break; 568 case APP_CONNECTED: 569 if (broadcast_source_count > broadcast_source_current) { 570 printf("Selected Broadcast source: addr %s, type %u, name: %s, synced %u\n", 571 bd_addr_to_str(broadcast_sources[broadcast_source_current].addr), 572 broadcast_sources[broadcast_source_current].addr_type, 573 broadcast_sources[broadcast_source_current].name, 574 broadcast_source_synced); 575 } 576 printf("d - scan for Broadcast sources (%u s)\n", broadcast_source_scan_duration_s); 577 if (broadcast_source_count > broadcast_source_current) { 578 printf("1..%u select one of the Broadcast Sources:\n", broadcast_source_count); 579 uint8_t i; 580 for (i=0;i<broadcast_source_count;i++) { 581 printf("%u. addr %s, type %u, name: %s\n", i+1, 582 bd_addr_to_str(broadcast_sources[broadcast_source_current].addr), 583 broadcast_sources[broadcast_source_current].addr_type, 584 broadcast_sources[broadcast_source_current].name); 585 } 586 printf("a - add source with BIS Sync 0x%08x\n", bis_sync_mask); 587 printf("A - add source with BIS Sync 0x00000000 (do not sync)\n"); 588 printf("m - modify source to PA Sync = 0, bis sync = 0x00000000\n"); 589 printf("M - modify source to PA Sync = 1, bis sync = 0x%08x\n", bis_sync_mask); 590 printf("b - send Broadcast Code: "); 591 printf_hexdump(broadcast_code, sizeof(broadcast_code)); 592 printf("r - remove source\n"); 593 } 594 break; 595 default: 596 printf("[LE Audio Broadcast Assistant busy]\n"); 597 break; 598 } 599 printf("---\n"); 600 } 601 602 static void stdin_process(char c){ 603 switch (app_state) { 604 case APP_IDLE: 605 switch (c) { 606 case 's': 607 manual_mode = false; 608 scan_for_scan_delegator = true; 609 scan_for_broadcast_source = true; 610 start_scanning(); 611 app_state = APP_W4_SCAN_DELEGATOR_CONNECTION; 612 break; 613 case 'c': 614 manual_mode = true; 615 scan_for_scan_delegator = true; 616 scan_for_broadcast_source = false; 617 start_scanning(); 618 app_state = APP_W4_SCAN_DELEGATOR_CONNECTION; 619 break; 620 default: 621 break; 622 } 623 break; 624 case APP_CONNECTED: 625 if ((c >= '1') && (c <= '9')){ 626 uint8_t digit = c - '0'; 627 if (digit <= broadcast_source_count) { 628 broadcast_source_synced = false; 629 broadcast_source_current = digit-1; 630 printf("Selected addr %s, type %u, name: %s\n", 631 bd_addr_to_str(broadcast_sources[broadcast_source_current].addr), 632 broadcast_sources[broadcast_source_current].addr_type, 633 broadcast_sources[broadcast_source_current].name); 634 } 635 break; 636 } 637 switch (c) { 638 case 'd': 639 scan_for_scan_delegator = false; 640 scan_for_broadcast_source = true; 641 start_scanning(); 642 btstack_run_loop_set_timer(&broadcast_source_scan_timer, broadcast_source_scan_duration_s * 1000); 643 btstack_run_loop_set_timer_handler(&broadcast_source_scan_timer, broadcast_source_scan_timeout_handler); 644 btstack_run_loop_add_timer(&broadcast_source_scan_timer); 645 break; 646 default: 647 break; 648 } 649 break; 650 default: 651 break; 652 } 653 654 switch (c){ 655 case 'a': 656 bass_source_data.subgroups[0].bis_sync = bis_sync_mask; 657 add_source(); 658 break; 659 case 'A': 660 bass_source_data.subgroups[0].bis_sync = 0; 661 add_source(); 662 break; 663 case 'm': 664 bass_source_data.pa_sync = LE_AUDIO_PA_SYNC_DO_NOT_SYNCHRONIZE_TO_PA; 665 bass_source_data.subgroups[0].bis_sync_state = 0; 666 broadcast_audio_scan_service_client_modify_source(bass_cid, bass_source_id, &bass_source_data); 667 break; 668 case 'M': 669 bass_source_data.pa_sync = LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_NOT_AVAILABLE; 670 bass_source_data.subgroups[0].bis_sync_state = bis_sync_mask; 671 broadcast_audio_scan_service_client_modify_source(bass_cid, bass_source_id, &bass_source_data); 672 break; 673 case 'r': 674 broadcast_audio_scan_service_client_remove_source(bass_cid, bass_source_id); 675 break; 676 case 'b': 677 broadcast_audio_scan_service_client_set_broadcast_code(bass_cid, bass_source_id, broadcast_code); 678 break; 679 case '\n': 680 case '\r': 681 break; 682 default: 683 show_usage(); 684 break; 685 686 } 687 } 688 689 int btstack_main(int argc, const char * argv[]); 690 int btstack_main(int argc, const char * argv[]){ 691 (void) argv; 692 (void) argc; 693 694 l2cap_init(); 695 sm_init(); 696 gatt_client_init(); 697 698 // register for HCI events 699 hci_event_callback_registration.callback = &packet_handler; 700 hci_add_event_handler(&hci_event_callback_registration); 701 702 // register for SM events 703 sm_event_callback_registration.callback = &packet_handler; 704 sm_add_event_handler(&sm_event_callback_registration); 705 706 broadcast_audio_scan_service_client_init(&bass_packet_handler); 707 708 // turn on! 709 hci_power_control(HCI_POWER_ON); 710 711 btstack_stdin_setup(stdin_process); 712 return 0; 713 } 714