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_sink.c" 39 40 /* 41 * LE Audio Broadcast Sink 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/att_server.h" 55 #include "ble/sm.h" 56 #include "bluetooth_data_types.h" 57 #include "bluetooth_gatt.h" 58 #include "btstack_debug.h" 59 #include "btstack_audio.h" 60 #include "btstack_event.h" 61 #include "btstack_run_loop.h" 62 #include "btstack_ring_buffer.h" 63 #include "btstack_stdin.h" 64 #include "btstack_util.h" 65 #include "gap.h" 66 #include "hci.h" 67 #include "hci_cmd.h" 68 #include "btstack_lc3.h" 69 #include "btstack_lc3_google.h" 70 #include "btstack_lc3plus_fraunhofer.h" 71 #include "l2cap.h" 72 #include "le-audio/le_audio_base_parser.h" 73 #include "le-audio/gatt-service/broadcast_audio_scan_service_server.h" 74 75 #include "le_audio_broadcast_sink.h" 76 #include "le_audio_demo_util_sink.h" 77 78 // max config 79 #define MAX_NUM_BIS 2 80 #define MAX_SAMPLES_PER_FRAME 480 81 82 // playback 83 #define MAX_NUM_LC3_FRAMES 5 84 #define MAX_BYTES_PER_SAMPLE 4 85 #define PLAYBACK_BUFFER_SIZE (MAX_NUM_LC3_FRAMES * MAX_SAMPLES_PER_FRAME * MAX_BYTES_PER_SAMPLE) 86 87 static void show_usage(void); 88 89 static const char * filename_wav = "le_audio_broadcast_sink.wav"; 90 91 static enum { 92 APP_W4_WORKING, 93 APP_W4_BROADCAST_ADV, 94 APP_W4_PA_AND_BIG_INFO, 95 APP_W4_BROADCAST_CODE, 96 APP_W4_BIG_SYNC_ESTABLISHED, 97 APP_STREAMING, 98 APP_IDLE 99 } app_state = APP_W4_WORKING; 100 101 static const uint8_t adv_sid = 0; 102 static le_advertising_set_t le_advertising_set; 103 static uint8_t adv_handle = 0; 104 105 static le_extended_advertising_parameters_t extended_params = { 106 .advertising_event_properties = 1, // connectable 107 .primary_advertising_interval_min = 0x4b0, // 750 ms 108 .primary_advertising_interval_max = 0x4b0, // 750 ms 109 .primary_advertising_channel_map = 7, 110 .own_address_type = BD_ADDR_TYPE_LE_PUBLIC, 111 .peer_address_type = 0, 112 .peer_address = { 0 }, 113 .advertising_filter_policy = 0, 114 .advertising_tx_power = 10, // 10 dBm 115 .primary_advertising_phy = 1, // LE 1M PHY 116 .secondary_advertising_max_skip = 0, 117 .secondary_advertising_phy = 1, // LE 1M PHY 118 .advertising_sid = adv_sid, 119 .scan_request_notification_enable = 0, 120 }; 121 122 static const uint8_t extended_adv_data[] = { 123 // 16 bit service data, ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE, 124 3, BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID, 125 ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE & 0xff, ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE >> 8, 126 // name 127 5, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'S', 'i', 'n', 'k' 128 }; 129 130 #define BASS_NUM_CLIENTS 1 131 #define BASS_NUM_SOURCES 1 132 static bass_source_data_t bass_source_new; 133 static bass_server_source_t bass_sources[BASS_NUM_SOURCES]; 134 static bass_server_connection_t bass_clients[BASS_NUM_CLIENTS]; 135 136 // 137 static btstack_packet_callback_registration_t hci_event_callback_registration; 138 static btstack_packet_callback_registration_t sm_event_callback_registration; 139 140 static bool have_base; 141 static bool have_big_info; 142 static bool have_broadcast_code; 143 static bool standalone_mode; 144 static uint32_t bis_sync_mask; 145 146 uint16_t samples_received; 147 uint16_t samples_dropped; 148 149 // remote info 150 static char remote_name[20]; 151 static bd_addr_t remote; 152 static bd_addr_type_t remote_type; 153 static uint8_t remote_sid; 154 static bool count_mode; 155 static bool pts_mode; 156 static bool nrf5340_audio_demo; 157 158 159 // broadcast info 160 static const uint8_t big_handle = 1; 161 static hci_con_handle_t sync_handle; 162 static hci_con_handle_t bis_con_handles[MAX_NUM_BIS]; 163 static uint8_t encryption; 164 static uint8_t broadcast_code[16]; 165 166 static btstack_timer_source_t broadcast_sink_pa_sync_timer; 167 168 // BIG Sync 169 static le_audio_big_sync_t big_sync_storage; 170 static le_audio_big_sync_params_t big_sync_params; 171 172 // lc3 codec config 173 static uint16_t sampling_frequency_hz; 174 static btstack_lc3_frame_duration_t frame_duration; 175 static uint16_t number_samples_per_frame; 176 static uint16_t octets_per_frame; 177 static uint8_t num_bis; 178 179 static void handle_periodic_advertisement(const uint8_t * packet, uint16_t size){ 180 // nRF534_audio quirk - no BASE in periodic advertisement 181 if (nrf5340_audio_demo){ 182 // hard coded config LC3 183 // default: mono bitrate 96000, 10 ms with USB audio source, 120 octets per frame 184 count_mode = 0; 185 pts_mode = 0; 186 num_bis = 1; 187 sampling_frequency_hz = 48000; 188 frame_duration = BTSTACK_LC3_FRAME_DURATION_10000US; 189 octets_per_frame = 120; 190 have_base = true; 191 return; 192 } 193 194 // periodic advertisement contains the BASE 195 // TODO: BASE might be split across multiple advertisements 196 const uint8_t * adv_data = hci_subevent_le_periodic_advertising_report_get_data(packet); 197 uint16_t adv_size = hci_subevent_le_periodic_advertising_report_get_data_length(packet); 198 uint8_t adv_status = hci_subevent_le_periodic_advertising_report_get_data_status(packet); 199 200 if (adv_status != 0) { 201 printf("Periodic Advertisement (status %u): ", adv_status); 202 printf_hexdump(adv_data, adv_size); 203 return; 204 } 205 206 le_audio_base_parser_t parser; 207 bool ok = le_audio_base_parser_init(&parser, adv_data, adv_size); 208 if (ok == false){ 209 return; 210 } 211 have_base = true; 212 213 printf("BASE:\n"); 214 uint32_t presentation_delay = le_audio_base_parser_get_presentation_delay(&parser); 215 printf("- presentation delay: %"PRIu32" us\n", presentation_delay); 216 uint8_t num_subgroups = le_audio_base_parser_get_num_subgroups(&parser); 217 // Cache in new source struct 218 bass_source_new.subgroups_num = num_subgroups; 219 printf("- num subgroups: %u\n", num_subgroups); 220 uint8_t i; 221 for (i=0;i<num_subgroups;i++){ 222 // Level 2: Subgroup Level 223 printf(" - Subgroup %u\n", i); 224 num_bis = le_audio_base_parser_subgroup_get_num_bis(&parser); 225 printf(" - num bis[%u]: %u\n", i, num_bis); 226 uint8_t codec_specific_configuration_length = le_audio_base_parser_subgroup_get_codec_specific_configuration_length(&parser); 227 const uint8_t * codec_specific_configuration = le_audio_base_parser_subgroup_get_codec_specific_configuration(&parser); 228 printf(" - codec specific config[%u]: ", i); 229 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 230 // parse config to get sampling frequency and frame duration 231 uint8_t codec_offset = 0; 232 while ((codec_offset + 1) < codec_specific_configuration_length){ 233 uint8_t ltv_len = codec_specific_configuration[codec_offset++]; 234 uint8_t ltv_type = codec_specific_configuration[codec_offset]; 235 const uint32_t sampling_frequency_map[] = { 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 384000 }; 236 uint8_t sampling_frequency_index; 237 uint8_t frame_duration_index; 238 switch (ltv_type){ 239 case 0x01: // sampling frequency 240 sampling_frequency_index = codec_specific_configuration[codec_offset+1]; 241 // TODO: check range 242 sampling_frequency_hz = sampling_frequency_map[sampling_frequency_index - 1]; 243 printf(" - sampling frequency[%u]: %u\n", i, sampling_frequency_hz); 244 break; 245 case 0x02: // 0 = 7.5, 1 = 10 ms 246 frame_duration_index = codec_specific_configuration[codec_offset+1]; 247 frame_duration = (frame_duration_index == 0) ? BTSTACK_LC3_FRAME_DURATION_7500US : BTSTACK_LC3_FRAME_DURATION_10000US; 248 printf(" - frame duration[%u]: %s ms\n", i, (frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US) ? "7.5" : "10"); 249 break; 250 case 0x04: // octets per coding frame 251 octets_per_frame = little_endian_read_16(codec_specific_configuration, codec_offset+1); 252 printf(" - octets per codec frame[%u]: %u\n", i, octets_per_frame); 253 break; 254 default: 255 break; 256 } 257 codec_offset += ltv_len; 258 } 259 uint8_t metadata_length = le_audio_base_parser_subgroup_get_metadata_length(&parser); 260 const uint8_t * meta_data = le_audio_base_subgroup_parser_get_metadata(&parser); 261 printf(" - meta data[%u]: ", i); 262 printf_hexdump(meta_data, metadata_length); 263 uint8_t k; 264 for (k=0;k<num_bis;k++){ 265 printf(" - BIS %u\n", k); 266 // Level 3: BIS Level 267 uint8_t bis_index = le_audio_base_parser_bis_get_index(&parser); 268 if ((bis_index == 0) || (bis_index > 30)){ 269 continue; 270 } 271 272 // collect bis sync mask 273 bis_sync_mask |= 1 << (bis_index - 1); 274 275 bass_source_new.subgroups[i].metadata_length = 0; 276 memset(&bass_source_new.subgroups[i].metadata, 0, sizeof(le_audio_metadata_t)); 277 278 printf(" - bis index[%u][%u]: %u\n", i, k, bis_index); 279 codec_specific_configuration_length = le_audio_base_parser_bis_get_codec_specific_configuration_length(&parser); 280 codec_specific_configuration = le_audio_base_bis_parser_get_codec_specific_configuration(&parser); 281 printf(" - codec specific config[%u][%u]: ", i, k); 282 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 283 // parse next BIS 284 le_audio_base_parser_bis_next(&parser); 285 } 286 287 // parse next subgroup 288 le_audio_base_parser_subgroup_next(&parser); 289 } 290 } 291 292 static void handle_big_info(const uint8_t * packet, uint16_t size){ 293 printf("BIG Info advertising report\n"); 294 sync_handle = hci_subevent_le_biginfo_advertising_report_get_sync_handle(packet); 295 encryption = hci_subevent_le_biginfo_advertising_report_get_encryption(packet); 296 if (encryption) { 297 printf("Stream is encrypted\n"); 298 } 299 have_big_info = true; 300 } 301 302 static void enter_create_big_sync(void){ 303 // stop scanning 304 gap_stop_scan(); 305 306 // init sink 307 uint16_t iso_interval_1250us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 6 : 8; 308 uint8_t pre_transmission_offset = 1; 309 le_audio_demo_util_sink_configure_broadcast(num_bis, 1, sampling_frequency_hz, frame_duration, octets_per_frame, 310 iso_interval_1250us, pre_transmission_offset); 311 312 big_sync_params.big_handle = big_handle; 313 big_sync_params.sync_handle = sync_handle; 314 big_sync_params.encryption = encryption; 315 if (encryption) { 316 memcpy(big_sync_params.broadcast_code, &broadcast_code[0], 16); 317 } else { 318 memset(big_sync_params.broadcast_code, 0, 16); 319 } 320 big_sync_params.mse = 0; 321 big_sync_params.big_sync_timeout_10ms = 100; 322 big_sync_params.num_bis = num_bis; 323 uint8_t i; 324 printf("BIG Create Sync for BIS: "); 325 for (i=0;i<num_bis;i++){ 326 big_sync_params.bis_indices[i] = i + 1; 327 printf("%u ", big_sync_params.bis_indices[i]); 328 } 329 printf("\n"); 330 app_state = APP_W4_BIG_SYNC_ESTABLISHED; 331 gap_big_sync_create(&big_sync_storage, &big_sync_params); 332 } 333 334 static void start_scanning() { 335 app_state = APP_W4_BROADCAST_ADV; 336 have_base = false; 337 have_big_info = false; 338 gap_set_scan_params(1, 0x30, 0x30, 0); 339 gap_start_scan(); 340 printf("Start scan..\n"); 341 } 342 343 static void setup_advertising() { 344 bd_addr_t local_addr; 345 gap_local_bd_addr(local_addr); 346 bool local_address_invalid = btstack_is_null_bd_addr( local_addr ); 347 if( local_address_invalid ) { 348 extended_params.own_address_type = BD_ADDR_TYPE_LE_RANDOM; 349 } 350 gap_extended_advertising_setup(&le_advertising_set, &extended_params, &adv_handle); 351 if( local_address_invalid ) { 352 bd_addr_t random_address = { 0xC1, 0x01, 0x01, 0x01, 0x01, 0x01 }; 353 gap_extended_advertising_set_random_address( adv_handle, random_address ); 354 } 355 gap_extended_advertising_set_adv_data(adv_handle, sizeof(extended_adv_data), extended_adv_data); 356 gap_extended_advertising_start(adv_handle, 0, 0); 357 } 358 359 static void got_base_and_big_info() { 360 // add source 361 if (standalone_mode) { 362 printf("BASS: add Broadcast Source\n"); 363 // add source 364 uint8_t source_index = 0; 365 broadcast_audio_scan_service_server_add_source(&bass_source_new, &source_index); 366 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 367 } 368 369 if ((encryption == false) || have_broadcast_code){ 370 enter_create_big_sync(); 371 } else { 372 printf("BASS: request Broadcast Code\n"); 373 bass_sources[0].big_encryption = LE_AUDIO_BIG_ENCRYPTION_BROADCAST_CODE_REQUIRED; 374 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 375 app_state = APP_W4_BROADCAST_CODE; 376 } 377 } 378 379 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 380 UNUSED(channel); 381 if (packet_type != HCI_EVENT_PACKET) return; 382 switch (packet[0]) { 383 case BTSTACK_EVENT_STATE: 384 switch(btstack_event_state_get_state(packet)) { 385 case HCI_STATE_WORKING: 386 app_state = APP_IDLE; 387 #ifdef ENABLE_DEMO_MODE 388 start_scanning(); 389 #else 390 show_usage(); 391 #endif 392 break; 393 case HCI_STATE_OFF: 394 printf("Goodbye\n"); 395 exit(0); 396 break; 397 default: 398 break; 399 } 400 break; 401 case GAP_EVENT_EXTENDED_ADVERTISING_REPORT: 402 { 403 if (app_state != APP_W4_BROADCAST_ADV) break; 404 405 gap_event_extended_advertising_report_get_address(packet, remote); 406 uint8_t adv_size = gap_event_extended_advertising_report_get_data_length(packet); 407 const uint8_t * adv_data = gap_event_extended_advertising_report_get_data(packet); 408 409 ad_context_t context; 410 bool found = false; 411 remote_name[0] = '\0'; 412 uint16_t uuid; 413 uint32_t broadcast_id; 414 for (ad_iterator_init(&context, adv_size, adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 415 uint8_t data_type = ad_iterator_get_data_type(&context); 416 uint8_t size = ad_iterator_get_data_len(&context); 417 const uint8_t *data = ad_iterator_get_data(&context); 418 switch (data_type){ 419 case BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID: 420 uuid = little_endian_read_16(data, 0); 421 if (uuid == ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_ANNOUNCEMENT_SERVICE){ 422 broadcast_id = little_endian_read_24(data, 2); 423 found = true; 424 } 425 break; 426 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 427 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 428 size = btstack_min(sizeof(remote_name) - 1, size); 429 memcpy(remote_name, data, size); 430 remote_name[size] = 0; 431 // support for nRF5340 Audio DK 432 if (strncmp("NRF5340", remote_name, 7) == 0){ 433 nrf5340_audio_demo = true; 434 found = true; 435 } 436 break; 437 default: 438 break; 439 } 440 } 441 if (!found) break; 442 remote_type = gap_event_extended_advertising_report_get_address_type(packet); 443 remote_sid = gap_event_extended_advertising_report_get_advertising_sid(packet); 444 pts_mode = strncmp("PTS-", remote_name, 4) == 0; 445 count_mode = strncmp("COUNT", remote_name, 5) == 0; 446 printf("Broadcast sink found, addr %s, name: '%s' (pts-mode: %u, count: %u), Broadcast_ID 0%06x\n", bd_addr_to_str(remote), remote_name, pts_mode, count_mode, broadcast_id); 447 // ignore other advertisements 448 gap_whitelist_add(remote_type, remote); 449 gap_set_scan_params(1, 0x30, 0x30, 1); 450 // sync to PA 451 gap_periodic_advertiser_list_clear(); 452 gap_periodic_advertiser_list_add(remote_type, remote, remote_sid); 453 app_state = APP_W4_PA_AND_BIG_INFO; 454 printf("Start Periodic Advertising Sync\n"); 455 gap_periodic_advertising_create_sync(0x01, remote_sid, remote_type, remote, 0, 1000, 0); 456 457 // setup bass source info 458 bass_source_new.address_type = remote_type; 459 memcpy(bass_source_new.address, remote, 6); 460 bass_source_new.adv_sid = remote_sid; 461 bass_source_new.broadcast_id = broadcast_id; 462 bass_source_new.pa_sync = LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE; 463 bass_source_new.pa_interval = gap_event_extended_advertising_report_get_periodic_advertising_interval(packet); 464 break; 465 } 466 467 case HCI_EVENT_LE_META: 468 switch(hci_event_le_meta_get_subevent_code(packet)) { 469 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_TRANSFER_RECEIVED: 470 // PAST implies broadcast source has been added by client 471 printf("Periodic advertising sync transfer received\n"); 472 btstack_run_loop_remove_timer(&broadcast_sink_pa_sync_timer); 473 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 474 app_state = APP_W4_PA_AND_BIG_INFO; 475 break; 476 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 477 sync_handle = hci_subevent_le_periodic_advertising_sync_establishment_get_sync_handle(packet); 478 printf("Periodic advertising sync with handle 0x%04x established\n", sync_handle); 479 app_state = APP_W4_PA_AND_BIG_INFO; 480 break; 481 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_REPORT: 482 if (app_state != APP_W4_PA_AND_BIG_INFO) break; 483 if (have_base) break; 484 handle_periodic_advertisement(packet, size); 485 if (have_base && have_big_info){ 486 got_base_and_big_info(); 487 } 488 break; 489 case HCI_SUBEVENT_LE_BIGINFO_ADVERTISING_REPORT: 490 if (app_state != APP_W4_PA_AND_BIG_INFO) break; 491 if (have_big_info) break; 492 handle_big_info(packet, size); 493 if (have_base && have_big_info){ 494 got_base_and_big_info(); 495 } 496 break; 497 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 498 printf("BIG Sync Lost\n"); 499 { 500 const btstack_audio_sink_t * sink = btstack_audio_sink_get_instance(); 501 if (sink != NULL) { 502 sink->stop_stream(); 503 sink->close(); 504 } 505 } 506 // start over 507 if (!standalone_mode) break; 508 start_scanning(); 509 break; 510 default: 511 break; 512 } 513 break; 514 case HCI_EVENT_META_GAP: 515 switch (hci_event_gap_meta_get_subevent_code(packet)){ 516 case GAP_SUBEVENT_BIG_SYNC_CREATED: { 517 printf("BIG Sync created with BIS Connection handles: "); 518 uint8_t i; 519 for (i=0;i<num_bis;i++){ 520 bis_con_handles[i] = gap_subevent_big_sync_created_get_bis_con_handles(packet, i); 521 printf("0x%04x ", bis_con_handles[i]); 522 } 523 printf("\n"); 524 app_state = APP_STREAMING; 525 printf("Start receiving\n"); 526 527 // update BIS Sync state 528 bass_sources[0].data.subgroups[0].bis_sync_state = bis_sync_mask; 529 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 530 break; 531 } 532 case GAP_SUBEVENT_BIG_SYNC_STOPPED: 533 printf("BIG Sync stopped, big_handle 0x%02x\n", gap_subevent_big_sync_stopped_get_big_handle(packet)); 534 break; 535 default: 536 break; 537 } 538 break; 539 case SM_EVENT_JUST_WORKS_REQUEST: 540 printf("Just Works requested\n"); 541 sm_just_works_confirm(sm_event_just_works_request_get_handle(packet)); 542 break; 543 default: 544 break; 545 } 546 } 547 548 static void show_usage(void){ 549 printf("\n--- LE Audio Broadcast Sink Test Console ---\n"); 550 printf("s - start scanning\n"); 551 #ifdef HAVE_LC3PLUS 552 printf("q - use LC3plus decoder if 10 ms ISO interval is used\n"); 553 #endif 554 printf("e - set broadcast code to 0x11111111111111111111111111111111\n"); 555 printf("t - terminate BIS streams\n"); 556 printf("---\n"); 557 } 558 559 static void stdin_process(char c){ 560 switch (c){ 561 case 's': 562 if (app_state != APP_IDLE) break; 563 standalone_mode = true; 564 start_scanning(); 565 break; 566 case 'e': 567 printf("Set broadcast code to 0x11111111111111111111111111111111\n"); 568 memset(broadcast_code, 0x11, 16); 569 have_broadcast_code = true; 570 break; 571 #ifdef HAVE_LC3PLUS 572 case 'q': 573 printf("Use LC3plus decoder for 10 ms ISO interval...\n"); 574 request_lc3plus_decoder = true; 575 break; 576 #endif 577 case 't': 578 switch (app_state){ 579 case APP_STREAMING: 580 case APP_W4_BIG_SYNC_ESTABLISHED: 581 app_state = APP_IDLE; 582 le_audio_demo_util_sink_close(); 583 printf("Terminate BIG SYNC\n"); 584 gap_big_sync_terminate(big_handle); 585 break; 586 default: 587 break; 588 } 589 break; 590 case '\n': 591 case '\r': 592 break; 593 default: 594 show_usage(); 595 break; 596 597 } 598 } 599 600 static void iso_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 601 // get stream_index from con_handle 602 uint16_t header = little_endian_read_16(packet, 0); 603 hci_con_handle_t con_handle = header & 0x0fff; 604 uint8_t i; 605 for (i=0;i<num_bis;i++){ 606 if (bis_con_handles[i] == con_handle) { 607 le_audio_demo_util_sink_receive(i, packet, size); 608 } 609 } 610 } 611 612 static void broadcast_sync_pa_sync_timeout_handler(btstack_timer_source_t * ts){ 613 UNUSED(ts); 614 printf("PAST Timeout -> LE_AUDIO_PA_SYNC_STATE_NO_PAST\n"); 615 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_NO_PAST); 616 } 617 618 static void bass_packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 619 UNUSED(packet_type); 620 UNUSED(channel); 621 btstack_assert (packet_type == HCI_EVENT_PACKET); 622 btstack_assert(hci_event_packet_get_type(packet) == HCI_EVENT_GATTSERVICE_META); 623 printf("BASS Event 0x%02x: ", hci_event_gattservice_meta_get_subevent_code(packet)); 624 printf_hexdump(packet, size); 625 switch (hci_event_gattservice_meta_get_subevent_code(packet)){ 626 case GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_ADDED: 627 printf("GATTSERVICE_SUBEVENT_BASS_SOURCE_ADDED, source_id 0x%04x, pa_sync %u\n", 628 gattservice_subevent_bass_server_source_added_get_source_id(packet), 629 gattservice_subevent_bass_server_source_added_get_pa_sync(packet)); 630 switch (gattservice_subevent_bass_server_source_added_get_pa_sync(packet)){ 631 case LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE: 632 printf("LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE -> Request SyncInfo\n"); 633 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCINFO_REQUEST); 634 // start timeout 635 btstack_run_loop_set_timer_handler(&broadcast_sink_pa_sync_timer, broadcast_sync_pa_sync_timeout_handler); 636 btstack_run_loop_set_timer(&broadcast_sink_pa_sync_timer, 10000); // 10 seconds 637 btstack_run_loop_add_timer(&broadcast_sink_pa_sync_timer); 638 break; 639 } 640 break; 641 case GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_MODIFIED: 642 printf("GATTSERVICE_SUBEVENT_BASS_SOURCE_MODIFIED, source_id 0x%04x, pa_sync %u\n", 643 gattservice_subevent_bass_server_source_added_get_source_id(packet), 644 gattservice_subevent_bass_server_source_added_get_pa_sync(packet)); 645 // handle 'bis sync == 0' 646 printf("PA Sync %u, bis_sync[0] = %u\n", bass_sources[0].data.pa_sync, bass_sources[0].data.subgroups[0].bis_sync); 647 if (bass_sources[0].data.subgroups[0].bis_sync == 0){ 648 printf("Simulate BIS Sync has stopped\n"); 649 bass_sources[0].data.subgroups[0].bis_sync_state = 0; 650 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 651 } 652 break; 653 case GATTSERVICE_SUBEVENT_BASS_SERVER_BROADCAST_CODE: 654 gattservice_subevent_bass_server_broadcast_code_get_broadcast_code(packet, broadcast_code); 655 printf("GATTSERVICE_SUBEVENT_BASS_BROADCAST_CODE received: "); 656 printf_hexdump(broadcast_code, 16); 657 bass_sources[0].big_encryption = LE_AUDIO_BIG_ENCRYPTION_DECRYPTING; 658 if (have_base && have_big_info){ 659 enter_create_big_sync(); 660 } 661 break; 662 default: 663 break; 664 } 665 } 666 667 int btstack_main(int argc, const char * argv[]); 668 int btstack_main(int argc, const char * argv[]){ 669 (void) argv; 670 (void) argc; 671 672 l2cap_init(); 673 sm_init(); 674 675 // setup ATT server 676 att_server_init(profile_data, NULL, NULL); 677 678 // register for HCI events 679 hci_event_callback_registration.callback = &packet_handler; 680 hci_add_event_handler(&hci_event_callback_registration); 681 682 // register for ISO Packet 683 hci_register_iso_packet_handler(&iso_packet_handler); 684 685 // register for SM events 686 sm_event_callback_registration.callback = &packet_handler; 687 sm_add_event_handler(&sm_event_callback_registration); 688 689 // setup BASS Server 690 broadcast_audio_scan_service_server_init(BASS_NUM_SOURCES, bass_sources, BASS_NUM_CLIENTS, bass_clients); 691 broadcast_audio_scan_service_server_register_packet_handler(&bass_packet_handler); 692 693 // setup advertising and allow to receive periodic advertising sync trasnfers 694 setup_advertising(); 695 gap_periodic_advertising_sync_transfer_set_default_parameters(2, 0, 0x2000, 0); 696 697 // turn on! 698 hci_power_control(HCI_POWER_ON); 699 700 btstack_stdin_setup(stdin_process); 701 return 0; 702 } 703