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