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_util.h" 73 #include "le-audio/le_audio_base_parser.h" 74 #include "le-audio/gatt-service/broadcast_audio_scan_service_server.h" 75 76 #include "le_audio_broadcast_sink.h" 77 #include "le_audio_demo_util_sink.h" 78 79 // max config 80 #define MAX_NUM_BIS 2 81 #define MAX_SAMPLES_PER_FRAME 480 82 83 // playback 84 #define MAX_NUM_LC3_FRAMES 5 85 #define MAX_BYTES_PER_SAMPLE 4 86 #define PLAYBACK_BUFFER_SIZE (MAX_NUM_LC3_FRAMES * MAX_SAMPLES_PER_FRAME * MAX_BYTES_PER_SAMPLE) 87 88 static void show_usage(void); 89 90 static enum { 91 APP_W4_WORKING, 92 APP_W4_BROADCAST_ADV, 93 APP_W4_PA_AND_BIG_INFO, 94 APP_W4_BROADCAST_CODE, 95 APP_W4_BIG_SYNC_ESTABLISHED, 96 APP_STREAMING, 97 APP_IDLE 98 } app_state = APP_W4_WORKING; 99 100 static const uint8_t adv_sid = 0; 101 static le_advertising_set_t le_advertising_set; 102 static uint8_t adv_handle = 0; 103 104 static le_extended_advertising_parameters_t extended_params = { 105 .advertising_event_properties = 1, // connectable 106 .primary_advertising_interval_min = 0x4b0, // 750 ms 107 .primary_advertising_interval_max = 0x4b0, // 750 ms 108 .primary_advertising_channel_map = 7, 109 .own_address_type = BD_ADDR_TYPE_LE_PUBLIC, 110 .peer_address_type = 0, 111 .peer_address = { 0 }, 112 .advertising_filter_policy = 0, 113 .advertising_tx_power = 10, // 10 dBm 114 .primary_advertising_phy = 1, // LE 1M PHY 115 .secondary_advertising_max_skip = 0, 116 .secondary_advertising_phy = 1, // LE 1M PHY 117 .advertising_sid = adv_sid, 118 .scan_request_notification_enable = 0, 119 }; 120 121 static const uint8_t extended_adv_data[] = { 122 // 16 bit service data, ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE, 123 3, BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID, 124 ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE & 0xff, ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_SCAN_SERVICE >> 8, 125 // name 126 5, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'S', 'i', 'n', 'k' 127 }; 128 129 #define BASS_NUM_CLIENTS 1 130 #define BASS_NUM_SOURCES 1 131 static bass_source_data_t bass_source_new; 132 static bass_server_source_t bass_sources[BASS_NUM_SOURCES]; 133 static bass_server_connection_t bass_clients[BASS_NUM_CLIENTS]; 134 135 // 136 static btstack_packet_callback_registration_t hci_event_callback_registration; 137 static btstack_packet_callback_registration_t sm_event_callback_registration; 138 139 static bool have_base; 140 static bool have_big_info; 141 static bool have_broadcast_code; 142 static bool standalone_mode; 143 static uint32_t bis_sync_mask; 144 145 uint16_t samples_received; 146 uint16_t samples_dropped; 147 148 // remote info 149 static char remote_name[20]; 150 static bd_addr_t remote; 151 static bd_addr_type_t remote_type; 152 static uint8_t remote_sid; 153 static bool count_mode; 154 static bool pts_mode; 155 static bool nrf5340_audio_demo; 156 157 // broadcast assistant 158 static hci_con_handle_t commander_acl_handle; 159 static bd_addr_t commander_address; 160 static bd_addr_type_t commander_type; 161 162 // broadcast info 163 static const uint8_t big_handle = 1; 164 static hci_con_handle_t sync_handle; 165 static hci_con_handle_t bis_con_handles[MAX_NUM_BIS]; 166 static uint8_t encryption; 167 static uint8_t broadcast_code[16]; 168 169 static btstack_timer_source_t broadcast_sink_pa_sync_timer; 170 171 // BIG Sync 172 static le_audio_big_sync_t big_sync_storage; 173 static le_audio_big_sync_params_t big_sync_params; 174 175 // lc3 codec config 176 static uint16_t sampling_frequency_hz; 177 static btstack_lc3_frame_duration_t frame_duration; 178 static uint16_t octets_per_frame; 179 static uint8_t num_bis; 180 181 static void handle_periodic_advertisement(const uint8_t * packet, uint16_t size){ 182 // nRF534_audio quirk - no BASE in periodic advertisement 183 if (nrf5340_audio_demo){ 184 // hard coded config LC3 185 // default: mono bitrate 96000, 10 ms with USB audio source, 120 octets per frame 186 count_mode = 0; 187 pts_mode = 0; 188 num_bis = 1; 189 sampling_frequency_hz = 48000; 190 frame_duration = BTSTACK_LC3_FRAME_DURATION_10000US; 191 octets_per_frame = 120; 192 have_base = true; 193 return; 194 } 195 196 // periodic advertisement contains the BASE 197 // TODO: BASE might be split across multiple advertisements 198 const uint8_t * adv_data = hci_subevent_le_periodic_advertising_report_get_data(packet); 199 uint16_t adv_size = hci_subevent_le_periodic_advertising_report_get_data_length(packet); 200 uint8_t adv_status = hci_subevent_le_periodic_advertising_report_get_data_status(packet); 201 202 if (adv_status != 0) { 203 printf("Periodic Advertisement (status %u): ", adv_status); 204 printf_hexdump(adv_data, adv_size); 205 return; 206 } 207 208 le_audio_base_parser_t parser; 209 bool ok = le_audio_base_parser_init(&parser, adv_data, adv_size); 210 if (ok == false){ 211 return; 212 } 213 have_base = true; 214 215 printf("BASE:\n"); 216 uint32_t presentation_delay = le_audio_base_parser_get_presentation_delay(&parser); 217 printf("- presentation delay: %"PRIu32" us\n", presentation_delay); 218 uint8_t num_subgroups = le_audio_base_parser_get_num_subgroups(&parser); 219 // Cache in new source struct 220 bass_source_new.subgroups_num = num_subgroups; 221 printf("- num subgroups: %u\n", num_subgroups); 222 uint8_t i; 223 for (i=0;i<num_subgroups;i++){ 224 // Level 2: Subgroup Level 225 printf(" - Subgroup %u\n", i); 226 num_bis = le_audio_base_parser_subgroup_get_num_bis(&parser); 227 printf(" - num bis[%u]: %u\n", i, num_bis); 228 uint8_t codec_specific_configuration_length = le_audio_base_parser_subgroup_get_codec_specific_configuration_length(&parser); 229 const uint8_t * codec_specific_configuration = le_audio_base_parser_subgroup_get_codec_specific_configuration(&parser); 230 printf(" - codec specific config[%u]: ", i); 231 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 232 // parse config to get sampling frequency and frame duration 233 uint8_t codec_offset = 0; 234 while ((codec_offset + 1) < codec_specific_configuration_length){ 235 uint8_t ltv_len = codec_specific_configuration[codec_offset++]; 236 uint8_t ltv_type = codec_specific_configuration[codec_offset]; 237 const uint32_t sampling_frequency_map[] = { 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 384000 }; 238 uint8_t sampling_frequency_index; 239 uint8_t frame_duration_index; 240 switch (ltv_type){ 241 case 0x01: // sampling frequency 242 sampling_frequency_index = codec_specific_configuration[codec_offset+1]; 243 // TODO: check range 244 sampling_frequency_hz = sampling_frequency_map[sampling_frequency_index - 1]; 245 printf(" - sampling frequency[%u]: %u\n", i, sampling_frequency_hz); 246 break; 247 case 0x02: // 0 = 7.5, 1 = 10 ms 248 frame_duration_index = codec_specific_configuration[codec_offset+1]; 249 frame_duration = le_audio_util_get_btstack_lc3_frame_duration(frame_duration_index); 250 printf(" - frame duration[%u]: %u us\n", i, le_audio_get_frame_duration_us(frame_duration_index)); 251 break; 252 case 0x04: // octets per coding frame 253 octets_per_frame = little_endian_read_16(codec_specific_configuration, codec_offset+1); 254 printf(" - octets per codec frame[%u]: %u\n", i, octets_per_frame); 255 break; 256 default: 257 break; 258 } 259 codec_offset += ltv_len; 260 } 261 uint8_t metadata_length = le_audio_base_parser_subgroup_get_metadata_length(&parser); 262 const uint8_t * meta_data = le_audio_base_subgroup_parser_get_metadata(&parser); 263 printf(" - meta data[%u]: ", i); 264 printf_hexdump(meta_data, metadata_length); 265 uint8_t k; 266 for (k=0;k<num_bis;k++){ 267 printf(" - BIS %u\n", k); 268 // Level 3: BIS Level 269 uint8_t bis_index = le_audio_base_parser_bis_get_index(&parser); 270 if ((bis_index == 0) || (bis_index > 30)){ 271 continue; 272 } 273 274 // collect bis sync mask 275 bis_sync_mask |= 1 << (bis_index - 1); 276 277 bass_source_new.subgroups[i].metadata_length = 0; 278 memset(&bass_source_new.subgroups[i].metadata, 0, sizeof(le_audio_metadata_t)); 279 280 printf(" - bis index[%u][%u]: %u\n", i, k, bis_index); 281 codec_specific_configuration_length = le_audio_base_parser_bis_get_codec_specific_configuration_length(&parser); 282 codec_specific_configuration = le_audio_base_bis_parser_get_codec_specific_configuration(&parser); 283 printf(" - codec specific config[%u][%u]: ", i, k); 284 printf_hexdump(codec_specific_configuration, codec_specific_configuration_length); 285 // parse next BIS 286 le_audio_base_parser_bis_next(&parser); 287 } 288 289 // parse next subgroup 290 le_audio_base_parser_subgroup_next(&parser); 291 } 292 } 293 294 static void handle_big_info(const uint8_t * packet, uint16_t size){ 295 printf("BIG Info advertising report\n"); 296 sync_handle = hci_subevent_le_biginfo_advertising_report_get_sync_handle(packet); 297 encryption = hci_subevent_le_biginfo_advertising_report_get_encryption(packet); 298 if (encryption) { 299 printf("Stream is encrypted\n"); 300 } 301 have_big_info = true; 302 } 303 304 static void enter_create_big_sync(void){ 305 // stop scanning 306 gap_stop_scan(); 307 308 // init sink 309 uint16_t iso_interval_1250us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 6 : 8; 310 uint8_t pre_transmission_offset = 1; 311 le_audio_demo_util_sink_configure_broadcast(num_bis, 1, sampling_frequency_hz, frame_duration, octets_per_frame, 312 iso_interval_1250us, pre_transmission_offset); 313 314 big_sync_params.big_handle = big_handle; 315 big_sync_params.sync_handle = sync_handle; 316 big_sync_params.encryption = encryption; 317 if (encryption) { 318 memcpy(big_sync_params.broadcast_code, &broadcast_code[0], 16); 319 } else { 320 memset(big_sync_params.broadcast_code, 0, 16); 321 } 322 big_sync_params.mse = 0; 323 big_sync_params.big_sync_timeout_10ms = 100; 324 big_sync_params.num_bis = num_bis; 325 uint8_t i; 326 printf("BIG Create Sync for BIS: "); 327 for (i=0;i<num_bis;i++){ 328 big_sync_params.bis_indices[i] = i + 1; 329 printf("%u ", big_sync_params.bis_indices[i]); 330 } 331 printf("\n"); 332 app_state = APP_W4_BIG_SYNC_ESTABLISHED; 333 gap_big_sync_create(&big_sync_storage, &big_sync_params); 334 } 335 336 static void start_scanning() { 337 app_state = APP_W4_BROADCAST_ADV; 338 have_base = false; 339 have_big_info = false; 340 gap_set_scan_params(1, 0x30, 0x30, 0); 341 gap_start_scan(); 342 printf("Start scan..\n"); 343 } 344 345 static void start_advertising(void) { 346 gap_extended_advertising_start(adv_handle, 0, 0); 347 } 348 349 static void setup_advertising(void) { 350 bd_addr_t local_addr; 351 gap_local_bd_addr(local_addr); 352 bool local_address_invalid = btstack_is_null_bd_addr( local_addr ); 353 if( local_address_invalid ) { 354 extended_params.own_address_type = BD_ADDR_TYPE_LE_RANDOM; 355 } 356 gap_extended_advertising_setup(&le_advertising_set, &extended_params, &adv_handle); 357 if( local_address_invalid ) { 358 bd_addr_t random_address = { 0xC1, 0x01, 0x01, 0x01, 0x01, 0x01 }; 359 gap_extended_advertising_set_random_address( adv_handle, random_address ); 360 } 361 gap_extended_advertising_set_adv_data(adv_handle, sizeof(extended_adv_data), extended_adv_data); 362 start_advertising(); 363 } 364 365 static void got_base_and_big_info() { 366 // add source 367 if (standalone_mode) { 368 printf("BASS: add Broadcast Source\n"); 369 // add source 370 uint8_t source_index = 0; 371 broadcast_audio_scan_service_server_add_source(&bass_source_new, &source_index); 372 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 373 } 374 375 // update num subgroups from BASE 376 bass_sources[0].data.subgroups_num = bass_source_new.subgroups_num; 377 378 if ((encryption == false) || have_broadcast_code){ 379 enter_create_big_sync(); 380 } else { 381 printf("BASS: request Broadcast Code\n"); 382 bass_sources[0].big_encryption = LE_AUDIO_BIG_ENCRYPTION_BROADCAST_CODE_REQUIRED; 383 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 384 app_state = APP_W4_BROADCAST_CODE; 385 } 386 } 387 388 static void start_pa_sync(bd_addr_type_t source_type, bd_addr_t source_addr) { 389 // ignore other advertisements 390 gap_whitelist_add(source_type, source_addr); 391 gap_set_scan_params(1, 0x30, 0x30, 1); 392 // sync to PA 393 gap_periodic_advertiser_list_clear(); 394 gap_periodic_advertiser_list_add(source_type, source_addr, remote_sid); 395 app_state = APP_W4_PA_AND_BIG_INFO; 396 printf("Start Periodic Advertising Sync\n"); 397 gap_periodic_advertising_create_sync(0x01, remote_sid, source_type, source_addr, 0, 1000, 0); 398 gap_start_scan(); 399 } 400 401 static void pa_sync_established() { 402 have_base = false; 403 have_big_info = false; 404 app_state = APP_W4_PA_AND_BIG_INFO; 405 } 406 407 static void stop_pa_sync(void) { 408 app_state = APP_IDLE; 409 le_audio_demo_util_sink_close(); 410 printf("Terminate BIG SYNC\n"); 411 gap_big_sync_terminate(big_handle); 412 int i; 413 for (i=0;i<num_bis;i++){ 414 if (bis_con_handles[i] != HCI_CON_HANDLE_INVALID) { 415 gap_disconnect(bis_con_handles[i]); 416 } 417 } 418 419 } 420 421 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 422 UNUSED(channel); 423 if (packet_type != HCI_EVENT_PACKET) return; 424 switch (packet[0]) { 425 case BTSTACK_EVENT_STATE: 426 switch(btstack_event_state_get_state(packet)) { 427 case HCI_STATE_WORKING: 428 app_state = APP_IDLE; 429 // setup advertising and allow to receive periodic advertising sync transfers 430 setup_advertising(); 431 gap_periodic_advertising_sync_transfer_set_default_parameters(2, 0, 0x2000, 0); 432 433 #ifdef ENABLE_DEMO_MODE 434 start_scanning(); 435 #else 436 show_usage(); 437 #endif 438 break; 439 case HCI_STATE_OFF: 440 printf("Goodbye\n"); 441 exit(0); 442 break; 443 default: 444 break; 445 } 446 break; 447 case GAP_EVENT_EXTENDED_ADVERTISING_REPORT: 448 { 449 if (app_state != APP_W4_BROADCAST_ADV) break; 450 451 gap_event_extended_advertising_report_get_address(packet, remote); 452 uint8_t adv_size = gap_event_extended_advertising_report_get_data_length(packet); 453 const uint8_t * adv_data = gap_event_extended_advertising_report_get_data(packet); 454 455 ad_context_t context; 456 bool found = false; 457 remote_name[0] = '\0'; 458 uint16_t uuid; 459 uint32_t broadcast_id; 460 for (ad_iterator_init(&context, adv_size, adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 461 const uint8_t data_type = ad_iterator_get_data_type(&context); 462 uint8_t data_size = ad_iterator_get_data_len(&context); 463 const uint8_t *data = ad_iterator_get_data(&context); 464 switch (data_type){ 465 case BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID: 466 uuid = little_endian_read_16(data, 0); 467 if (uuid == ORG_BLUETOOTH_SERVICE_BROADCAST_AUDIO_ANNOUNCEMENT_SERVICE){ 468 broadcast_id = little_endian_read_24(data, 2); 469 found = true; 470 } 471 break; 472 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 473 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 474 data_size = btstack_min(sizeof(remote_name) - 1, data_size); 475 memcpy(remote_name, data, data_size); 476 remote_name[data_size] = 0; 477 // support for nRF5340 Audio DK 478 if (strncmp("NRF5340", remote_name, 7) == 0){ 479 nrf5340_audio_demo = true; 480 found = true; 481 } 482 break; 483 default: 484 break; 485 } 486 } 487 if (!found) break; 488 remote_type = gap_event_extended_advertising_report_get_address_type(packet); 489 remote_sid = gap_event_extended_advertising_report_get_advertising_sid(packet); 490 pts_mode = strncmp("PTS-", remote_name, 4) == 0; 491 count_mode = strncmp("COUNT", remote_name, 5) == 0; 492 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); 493 494 // setup bass source info 495 bass_source_new.address_type = remote_type; 496 memcpy(bass_source_new.address, remote, 6); 497 bass_source_new.adv_sid = remote_sid; 498 bass_source_new.broadcast_id = broadcast_id; 499 bass_source_new.pa_sync = LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE; 500 bass_source_new.pa_interval = gap_event_extended_advertising_report_get_periodic_advertising_interval(packet); 501 502 // start pa sync 503 start_pa_sync(remote_type, remote); 504 break; 505 } 506 507 case HCI_EVENT_DISCONNECTION_COMPLETE: 508 // restart advertisements on disconnect 509 if (hci_event_disconnection_complete_get_connection_handle(packet) == commander_acl_handle) { 510 printf("Broadcast Assistant disconnected\n"); 511 commander_acl_handle = HCI_CON_HANDLE_INVALID; 512 start_advertising(); 513 } 514 break; 515 case HCI_EVENT_LE_META: 516 switch(hci_event_le_meta_get_subevent_code(packet)) { 517 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_TRANSFER_RECEIVED: 518 // PAST implies broadcast source has been added by client 519 sync_handle = hci_subevent_le_periodic_advertising_sync_transfer_received_get_sync_handle(packet); 520 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 521 btstack_run_loop_remove_timer(&broadcast_sink_pa_sync_timer); 522 printf("Periodic advertising sync transfer with handle 0x%04x received\n", sync_handle); 523 pa_sync_established(); 524 break; 525 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 526 sync_handle = hci_subevent_le_periodic_advertising_sync_establishment_get_sync_handle(packet); 527 printf("Periodic advertising sync with handle 0x%04x established\n", sync_handle); 528 pa_sync_established(); 529 break; 530 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_REPORT: 531 if (app_state != APP_W4_PA_AND_BIG_INFO) break; 532 if (have_base) break; 533 handle_periodic_advertisement(packet, size); 534 if (have_base && have_big_info){ 535 got_base_and_big_info(); 536 } 537 break; 538 case HCI_SUBEVENT_LE_BIGINFO_ADVERTISING_REPORT: 539 if (app_state != APP_W4_PA_AND_BIG_INFO) break; 540 if (have_big_info) break; 541 handle_big_info(packet, size); 542 if (have_base && have_big_info){ 543 got_base_and_big_info(); 544 } 545 break; 546 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 547 printf("BIG Sync Lost\n"); 548 { 549 const btstack_audio_sink_t * sink = btstack_audio_sink_get_instance(); 550 if (sink != NULL) { 551 sink->stop_stream(); 552 sink->close(); 553 } 554 } 555 // start over 556 if (!standalone_mode) break; 557 start_scanning(); 558 break; 559 default: 560 break; 561 } 562 break; 563 case HCI_EVENT_META_GAP: 564 switch (hci_event_gap_meta_get_subevent_code(packet)){ 565 case GAP_SUBEVENT_LE_CONNECTION_COMPLETE: 566 commander_acl_handle = gap_subevent_le_connection_complete_get_connection_handle(packet); 567 commander_type = gap_subevent_le_connection_complete_get_peer_address_type(packet); 568 gap_subevent_le_connection_complete_get_peer_address(packet, commander_address); 569 printf("Broadcast Assistant connected, handle 0x%04x - %s type %u\n", commander_acl_handle, bd_addr_to_str(commander_address), commander_type); 570 break; 571 case GAP_SUBEVENT_BIG_SYNC_CREATED: { 572 printf("BIG Sync created with BIS Connection handles: "); 573 uint8_t i; 574 for (i=0;i<num_bis;i++){ 575 bis_con_handles[i] = gap_subevent_big_sync_created_get_bis_con_handles(packet, i); 576 printf("0x%04x ", bis_con_handles[i]); 577 } 578 printf("\n"); 579 app_state = APP_STREAMING; 580 printf("Start receiving\n"); 581 582 printf("Terminate PA Sync\n"); 583 gap_periodic_advertising_terminate_sync(sync_handle); 584 585 // update BIS Sync state 586 bass_sources[0].data.subgroups[0].bis_sync_state = bis_sync_mask; 587 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_SYNCHRONIZED_TO_PA); 588 break; 589 } 590 case GAP_SUBEVENT_BIG_SYNC_STOPPED: 591 printf("BIG Sync stopped, big_handle 0x%02x\n", gap_subevent_big_sync_stopped_get_big_handle(packet)); 592 break; 593 default: 594 break; 595 } 596 break; 597 case SM_EVENT_JUST_WORKS_REQUEST: 598 printf("Just Works requested\n"); 599 sm_just_works_confirm(sm_event_just_works_request_get_handle(packet)); 600 break; 601 default: 602 break; 603 } 604 } 605 606 static void show_usage(void){ 607 printf("\n--- LE Audio Broadcast Sink Test Console ---\n"); 608 printf("s - start scanning\n"); 609 #ifdef HAVE_LC3PLUS 610 printf("q - use LC3plus decoder if 10 ms ISO interval is used\n"); 611 #endif 612 printf("e - set broadcast code to 0x11111111111111111111111111111111\n"); 613 printf("t - terminate BIS streams\n"); 614 printf("---\n"); 615 } 616 617 static void stdin_process(char c){ 618 switch (c){ 619 case 's': 620 if (app_state != APP_IDLE) break; 621 standalone_mode = true; 622 start_scanning(); 623 break; 624 case 'e': 625 printf("Set broadcast code to 0x11111111111111111111111111111111\n"); 626 memset(broadcast_code, 0x11, 16); 627 have_broadcast_code = true; 628 break; 629 #ifdef HAVE_LC3PLUS 630 case 'q': 631 printf("Use LC3plus decoder for 10 ms ISO interval...\n"); 632 le_audio_demo_util_sink_enable_lc3plus(true); 633 break; 634 #endif 635 case 't': 636 switch (app_state){ 637 case APP_STREAMING: 638 case APP_W4_BIG_SYNC_ESTABLISHED: 639 stop_pa_sync(); 640 break; 641 default: 642 break; 643 } 644 break; 645 case '\n': 646 case '\r': 647 break; 648 default: 649 show_usage(); 650 break; 651 652 } 653 } 654 655 static void iso_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 656 void (*packet_receive)(uint8_t stream_index, uint8_t *packet, uint16_t size) = le_audio_demo_util_sink_receive; 657 658 // get stream_index from con_handle 659 uint16_t header = little_endian_read_16(packet, 0); 660 hci_con_handle_t con_handle = header & 0x0fff; 661 uint8_t i; 662 663 if (count_mode){ 664 packet_receive = le_audio_demo_util_sink_count; 665 } 666 667 for (i=0;i<num_bis;i++){ 668 if (bis_con_handles[i] == con_handle) { 669 packet_receive(i, packet, size); 670 } 671 } 672 } 673 674 static void broadcast_sync_pa_sync_timeout_handler(btstack_timer_source_t * ts){ 675 UNUSED(ts); 676 printf("PAST Timeout -> LE_AUDIO_PA_SYNC_STATE_NO_PAST\n"); 677 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_NO_PAST); 678 } 679 680 static void handle_new_pa_sync(uint8_t source_id, le_audio_pa_sync_t pa_sync) { 681 switch (pa_sync){ 682 case LE_AUDIO_PA_SYNC_DO_NOT_SYNCHRONIZE_TO_PA: 683 printf("Stop PA Sync\n"); 684 stop_pa_sync(); 685 bass_sources[0].data.subgroups[0].bis_sync_state = 0; 686 broadcast_audio_scan_service_server_set_pa_sync_state(0, LE_AUDIO_PA_SYNC_STATE_NOT_SYNCHRONIZED_TO_PA); 687 break; 688 case LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE: 689 printf("LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE -> Request SyncInfo\n"); 690 broadcast_audio_scan_service_server_set_pa_sync_state(source_id, LE_AUDIO_PA_SYNC_STATE_SYNCINFO_REQUEST); 691 // start timeout 692 btstack_run_loop_set_timer_handler(&broadcast_sink_pa_sync_timer, broadcast_sync_pa_sync_timeout_handler); 693 btstack_run_loop_set_timer(&broadcast_sink_pa_sync_timer, 10000); // 10 seconds 694 btstack_run_loop_add_timer(&broadcast_sink_pa_sync_timer); 695 break; 696 case LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_NOT_AVAILABLE: 697 printf("LE_AUDIO_PA_SYNC_SYNCHRONIZE_TO_PA_PAST_AVAILABLE -> Start Periodic Advertising Sync\n"); 698 start_pa_sync(bass_sources[source_id].data.address_type, bass_sources[source_id].data.address); 699 break; 700 default: 701 break; 702 } 703 } 704 705 static void bass_packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 706 UNUSED(packet_type); 707 UNUSED(channel); 708 btstack_assert (packet_type == HCI_EVENT_PACKET); 709 btstack_assert(hci_event_packet_get_type(packet) == HCI_EVENT_GATTSERVICE_META); 710 uint8_t source_id; 711 printf("BASS Event 0x%02x: ", hci_event_gattservice_meta_get_subevent_code(packet)); 712 printf_hexdump(packet, size); 713 uint8_t pa_sync; 714 switch (hci_event_gattservice_meta_get_subevent_code(packet)){ 715 case GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_ADDED: 716 pa_sync = gattservice_subevent_bass_server_source_added_get_pa_sync(packet); 717 source_id = gattservice_subevent_bass_server_source_added_get_source_id(packet); 718 printf("GATTSERVICE_SUBEVENT_BASS_SOURCE_ADDED, source_id 0x%04x, pa_sync %u\n", source_id, pa_sync); 719 handle_new_pa_sync(source_id, pa_sync); 720 break; 721 case GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_MODIFIED: 722 pa_sync = gattservice_subevent_bass_server_source_added_get_pa_sync(packet); 723 source_id = gattservice_subevent_bass_server_source_added_get_source_id(packet); 724 printf("GATTSERVICE_SUBEVENT_BASS_SOURCE_MODIFIED, source_id 0x%04x, pa_sync %u\n", source_id, pa_sync); 725 handle_new_pa_sync(source_id, pa_sync); 726 break; 727 case GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_DELETED: 728 printf("GATTSERVICE_SUBEVENT_BASS_SERVER_SOURCE_DELETED, source_id 0x%04x\n", 729 gattservice_subevent_bass_server_source_deleted_get_source_id(packet)); 730 break; 731 case GATTSERVICE_SUBEVENT_BASS_SERVER_BROADCAST_CODE: 732 gattservice_subevent_bass_server_broadcast_code_get_broadcast_code(packet, broadcast_code); 733 printf("GATTSERVICE_SUBEVENT_BASS_BROADCAST_CODE received: "); 734 printf_hexdump(broadcast_code, 16); 735 bass_sources[0].big_encryption = LE_AUDIO_BIG_ENCRYPTION_DECRYPTING; 736 if (have_base && have_big_info){ 737 enter_create_big_sync(); 738 } 739 break; 740 default: 741 break; 742 } 743 } 744 745 int btstack_main(int argc, const char * argv[]); 746 int btstack_main(int argc, const char * argv[]){ 747 (void) argv; 748 (void) argc; 749 750 l2cap_init(); 751 sm_init(); 752 753 // setup ATT server 754 att_server_init(profile_data, NULL, NULL); 755 756 // register for HCI events 757 hci_event_callback_registration.callback = &packet_handler; 758 hci_add_event_handler(&hci_event_callback_registration); 759 760 // register for ISO Packet 761 hci_register_iso_packet_handler(&iso_packet_handler); 762 763 // register for SM events 764 sm_event_callback_registration.callback = &packet_handler; 765 sm_add_event_handler(&sm_event_callback_registration); 766 767 // setup BASS Server 768 broadcast_audio_scan_service_server_init(BASS_NUM_SOURCES, bass_sources, BASS_NUM_CLIENTS, bass_clients); 769 broadcast_audio_scan_service_server_register_packet_handler(&bass_packet_handler); 770 771 // setup audio processing 772 le_audio_demo_util_sink_init("le_audio_broadcast_sink.wav"); 773 774 // turn on! 775 hci_power_control(HCI_POWER_ON); 776 777 btstack_stdin_setup(stdin_process); 778 return 0; 779 } 780