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_source.c" 39 40 /* 41 * LE Audio Broadcast Source 42 */ 43 44 #include <stdint.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <btstack_debug.h> 48 49 #include "bluetooth_data_types.h" 50 #include "btstack_stdin.h" 51 #include "btstack_event.h" 52 #include "btstack_run_loop.h" 53 #include "gap.h" 54 #include "hci.h" 55 #include "hci_cmd.h" 56 #include "hci_dump.h" 57 #include "btstack_lc3.h" 58 #include "btstack_lc3_google.h" 59 #include "le-audio/le_audio_base_builder.h" 60 61 #include "hxcmod.h" 62 #include "mods/mod.h" 63 #include "le_audio_demo_util_source.h" 64 65 // Interoperability with Nordic LE Audio demo 66 //#define NRF5340_BROADCAST_MODE 67 68 // max config 69 #define MAX_NUM_BIS 2 70 #define MAX_SAMPLES_PER_FRAME 480 71 #define MAX_LC3_FRAME_BYTES 155 72 73 static const uint8_t adv_sid = 0; 74 75 static le_advertising_set_t le_advertising_set; 76 77 static le_extended_advertising_parameters_t extended_params = { 78 .advertising_event_properties = 0, 79 .primary_advertising_interval_min = 0x4b0, // 750 ms 80 .primary_advertising_interval_max = 0x4b0, // 750 ms 81 .primary_advertising_channel_map = 7, 82 .own_address_type = BD_ADDR_TYPE_LE_PUBLIC, 83 .peer_address_type = 0, 84 .peer_address = { 0 }, 85 .advertising_filter_policy = 0, 86 .advertising_tx_power = 10, // 10 dBm 87 .primary_advertising_phy = 1, // LE 1M PHY 88 .secondary_advertising_max_skip = 0, 89 .secondary_advertising_phy = 1, // LE 1M PHY 90 .advertising_sid = adv_sid, 91 .scan_request_notification_enable = 0, 92 }; 93 94 // Random Broadcast ID, valid for lifetime of BIG 95 #define BROADCAST_ID (0x112233u) 96 97 static const uint8_t extended_adv_data[] = { 98 // 16 bit service data, ORG_BLUETOOTH_SERVICE_BASIC_AUDIO_ANNOUNCEMENT_SERVICE, Broadcast ID 99 6, BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID, 0x52, 0x18, 100 BROADCAST_ID >> 16, 101 (BROADCAST_ID >> 8) & 0xff, 102 BROADCAST_ID & 0xff, 103 // name 104 #if defined(NRF5340_BROADCAST_MODE) 105 20, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'N','R','F','5','3','4','0','_','B','R','O','A','D','C','A','S','T','E','R', 106 20, BLUETOOTH_DATA_TYPE_BROADCAST_NAME, 'N','R','F','5','3','4','0','_','B','R','O','A','D','C','A','S','T','E','R', 107 #else 108 7, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'S', 'o', 'u', 'r', 'c', 'e', 109 7, BLUETOOTH_DATA_TYPE_BROADCAST_NAME, 'S', 'o', 'u', 'r', 'c', 'e', 110 #endif 111 }; 112 113 static const le_periodic_advertising_parameters_t periodic_params = { 114 .periodic_advertising_interval_min = 0x258, // 375 ms 115 .periodic_advertising_interval_max = 0x258, // 375 ms 116 .periodic_advertising_properties = 0 117 }; 118 119 static btstack_packet_callback_registration_t hci_event_callback_registration; 120 static uint8_t period_adv_data[255]; 121 static uint16_t period_adv_data_len; 122 123 static uint8_t adv_handle = 0; 124 static hci_con_handle_t bis_con_handles[MAX_NUM_BIS]; 125 126 static le_audio_big_t big_storage; 127 static le_audio_big_params_t big_params; 128 129 // time stamping 130 #ifdef COUNT_MODE 131 #define MAX_PACKET_INTERVAL_BINS_MS 50 132 static uint32_t send_time_bins[MAX_PACKET_INTERVAL_BINS_MS]; 133 static uint32_t send_last_ms; 134 #endif 135 136 // lc3 codec config 137 static uint16_t sampling_frequency_hz; 138 static btstack_lc3_frame_duration_t frame_duration; 139 static uint16_t number_samples_per_frame; 140 static uint16_t octets_per_frame; 141 static uint8_t num_bis = 1; 142 143 // codec menu 144 static uint8_t menu_sampling_frequency; 145 static uint8_t menu_variant; 146 147 // encryption 148 static uint8_t encryption = 0; 149 static uint8_t broadcast_code [] = {0x01, 0x02, 0x68, 0x05, 0x53, 0xF1, 0x41, 0x5A, 0xA2, 0x65, 0xBB, 0xAF, 0xC6, 0xEA, 0x03, 0xB8, }; 150 151 // audio producer 152 #ifdef COUNT_MODE 153 static le_audio_demo_source_generator audio_source = AUDIO_SOURCE_COUNTER; 154 #else 155 static le_audio_demo_source_generator audio_source = AUDIO_SOURCE_MODPLAYER; 156 #endif 157 158 static enum { 159 APP_IDLE, 160 APP_W4_CREATE_BIG_COMPLETE, 161 APP_STREAMING, 162 } app_state = APP_IDLE; 163 164 // enumerate default codec configs 165 static struct { 166 uint16_t samplingrate_hz; 167 uint8_t samplingrate_index; 168 uint8_t num_variants; 169 struct { 170 const char * name; 171 btstack_lc3_frame_duration_t frame_duration; 172 uint16_t octets_per_frame; 173 } variants[6]; 174 } codec_configurations[] = { 175 { 176 8000, 0x01, 2, 177 { 178 { "8_1", BTSTACK_LC3_FRAME_DURATION_7500US, 26}, 179 { "8_2", BTSTACK_LC3_FRAME_DURATION_10000US, 30} 180 } 181 }, 182 { 183 16000, 0x03, 2, 184 { 185 { "16_1", BTSTACK_LC3_FRAME_DURATION_7500US, 30}, 186 { "16_2", BTSTACK_LC3_FRAME_DURATION_10000US, 40} 187 } 188 }, 189 { 190 24000, 0x05, 2, 191 { 192 { "24_1", BTSTACK_LC3_FRAME_DURATION_7500US, 45}, 193 { "24_2", BTSTACK_LC3_FRAME_DURATION_10000US, 60} 194 } 195 }, 196 { 197 32000, 0x06, 2, 198 { 199 { "32_1", BTSTACK_LC3_FRAME_DURATION_7500US, 60}, 200 { "32_2", BTSTACK_LC3_FRAME_DURATION_10000US, 80} 201 } 202 }, 203 { 204 44100, 0x07, 2, 205 { 206 { "441_1", BTSTACK_LC3_FRAME_DURATION_7500US, 97}, 207 { "441_2", BTSTACK_LC3_FRAME_DURATION_10000US, 130} 208 } 209 }, 210 { 211 48000, 0x08, 6, 212 { 213 { "48_1", BTSTACK_LC3_FRAME_DURATION_7500US, 75}, 214 { "48_2", BTSTACK_LC3_FRAME_DURATION_10000US, 100}, 215 { "48_3", BTSTACK_LC3_FRAME_DURATION_7500US, 90}, 216 { "48_4", BTSTACK_LC3_FRAME_DURATION_10000US, 120}, 217 { "48_5", BTSTACK_LC3_FRAME_DURATION_7500US, 117}, 218 { "48_6", BTSTACK_LC3_FRAME_DURATION_10000US, 155} 219 } 220 }, 221 }; 222 223 static void show_usage(void); 224 225 static void print_config(void) { 226 static const char * generator[] = { "Sine", "Modplayer", "Recording"}; 227 printf("Config '%s_%u': %u, %s ms, %u octets - %s%s\n", 228 codec_configurations[menu_sampling_frequency].variants[menu_variant].name, 229 num_bis, 230 codec_configurations[menu_sampling_frequency].samplingrate_hz, 231 codec_configurations[menu_sampling_frequency].variants[menu_variant].frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10", 232 codec_configurations[menu_sampling_frequency].variants[menu_variant].octets_per_frame, 233 generator[audio_source - AUDIO_SOURCE_SINE], 234 encryption ? " (encrypted)" : ""); 235 } 236 237 static void setup_advertising() { 238 bd_addr_t local_addr; 239 gap_local_bd_addr(local_addr); 240 bool local_address_invalid = btstack_is_null_bd_addr( local_addr ); 241 if( local_address_invalid ) { 242 extended_params.own_address_type = BD_ADDR_TYPE_LE_RANDOM; 243 } 244 gap_extended_advertising_setup(&le_advertising_set, &extended_params, &adv_handle); 245 if( local_address_invalid ) { 246 bd_addr_t random_address = { 0xC1, 0x01, 0x01, 0x01, 0x01, 0x01 }; 247 gap_extended_advertising_set_random_address( adv_handle, random_address ); 248 } 249 gap_extended_advertising_set_adv_data(adv_handle, sizeof(extended_adv_data), extended_adv_data); 250 gap_periodic_advertising_set_params(adv_handle, &periodic_params); 251 gap_periodic_advertising_set_data(adv_handle, period_adv_data_len, period_adv_data); 252 gap_periodic_advertising_start(adv_handle, 0); 253 gap_extended_advertising_start(adv_handle, 0, 0); 254 } 255 256 static void setup_big(void){ 257 // Create BIG 258 big_params.big_handle = 0; 259 big_params.advertising_handle = adv_handle; 260 big_params.num_bis = num_bis; 261 big_params.max_sdu = octets_per_frame; 262 big_params.max_transport_latency_ms = 31; 263 big_params.rtn = 2; 264 big_params.phy = 2; 265 big_params.packing = 0; 266 big_params.encryption = encryption; 267 if (encryption) { 268 memcpy(big_params.broadcast_code, &broadcast_code[0], 16); 269 } else { 270 memset(big_params.broadcast_code, 0, 16); 271 } 272 if (sampling_frequency_hz == 44100){ 273 // same config as for 48k -> frame is longer by 48/44.1 274 big_params.sdu_interval_us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 8163 : 10884; 275 big_params.framing = 1; 276 } else { 277 big_params.sdu_interval_us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 7500 : 10000; 278 big_params.framing = 0; 279 } 280 app_state = APP_W4_CREATE_BIG_COMPLETE; 281 gap_big_create(&big_storage, &big_params); 282 } 283 284 285 static void start_broadcast() {// use values from table 286 sampling_frequency_hz = codec_configurations[menu_sampling_frequency].samplingrate_hz; 287 octets_per_frame = codec_configurations[menu_sampling_frequency].variants[menu_variant].octets_per_frame; 288 frame_duration = codec_configurations[menu_sampling_frequency].variants[menu_variant].frame_duration; 289 290 number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration); 291 292 le_audio_demo_util_source_configure(num_bis, 1, sampling_frequency_hz, frame_duration, octets_per_frame); 293 le_audio_demo_util_source_generate_iso_frame(audio_source); 294 295 // setup base 296 uint8_t codec_id[] = { 0x06, 0x00, 0x00, 0x00, 0x00 }; 297 uint8_t subgroup_codec_specific_configuration[] = { 298 0x02, 0x01, 0x01, 299 0x02, 0x02, 0x01, 300 0x03, 0x04, 0x1E, 0x00, 301 }; 302 subgroup_codec_specific_configuration[2] = codec_configurations[menu_sampling_frequency].samplingrate_index; 303 subgroup_codec_specific_configuration[5] = (frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US) ? 0 : 1;; 304 uint8_t subgroup_metadata[] = { 305 0x03, 0x02, 0x04, 0x00, // Metadata[i] 306 }; 307 little_endian_store_16(subgroup_codec_specific_configuration, 8, octets_per_frame); 308 uint8_t bis_codec_specific_configuration_1[] = { 309 0x05, 0x03, 0x01, 0x00, 0x00, 0x00 310 }; 311 uint8_t bis_codec_specific_configuration_2[] = { 312 0x05, 0x03, 0x02, 0x00, 0x00, 0x00 313 }; 314 le_audio_base_builder_t builder; 315 le_audio_base_builder_init(&builder, period_adv_data, sizeof(period_adv_data), 20000); 316 le_audio_base_builder_add_subgroup(&builder, codec_id, 317 sizeof(subgroup_codec_specific_configuration), 318 subgroup_codec_specific_configuration, 319 sizeof(subgroup_metadata), subgroup_metadata); 320 le_audio_base_builder_add_bis(&builder, 1, sizeof(bis_codec_specific_configuration_1), 321 bis_codec_specific_configuration_1); 322 if (num_bis == 2){ 323 le_audio_base_builder_add_bis(&builder, 2, sizeof(bis_codec_specific_configuration_2), 324 bis_codec_specific_configuration_2); 325 } 326 period_adv_data_len = le_audio_base_builder_get_ad_data_size(&builder); 327 328 // setup extended and periodic advertising 329 setup_advertising(); 330 331 // setup big 332 setup_big(); 333 } 334 335 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 336 UNUSED(channel); 337 if (packet_type != HCI_EVENT_PACKET) return; 338 uint8_t bis_index; 339 340 switch (packet[0]) { 341 case BTSTACK_EVENT_STATE: 342 switch(btstack_event_state_get_state(packet)) { 343 case HCI_STATE_WORKING: 344 #ifdef ENABLE_DEMO_MODE 345 // start broadcast automatically, mod player, 48_5_1 346 num_bis = 1; 347 menu_sampling_frequency = 5; 348 menu_variant = 4; 349 start_broadcast(); 350 #elif defined( NRF5340_BROADCAST_MODE ) 351 num_bis = 1; 352 menu_sampling_frequency = 5; 353 menu_variant = 1; 354 #else 355 show_usage(); 356 printf("Please select sample frequency and variation, then start broadcast\n"); 357 #endif 358 break; 359 case HCI_STATE_OFF: 360 printf("Goodbye\n"); 361 exit(0); 362 break; 363 default: 364 break; 365 } 366 break; 367 case HCI_EVENT_META_GAP: 368 switch (hci_event_gap_meta_get_subevent_code(packet)){ 369 case GAP_SUBEVENT_BIG_CREATED: 370 printf("BIG Created with BIS Connection handles: \n"); 371 for (bis_index=0;bis_index<num_bis;bis_index++){ 372 bis_con_handles[bis_index] = gap_subevent_big_created_get_bis_con_handles(packet, bis_index); 373 printf("0x%04x ", bis_con_handles[bis_index]); 374 } 375 376 app_state = APP_STREAMING; 377 printf("Start streaming\n"); 378 hci_request_bis_can_send_now_events(big_params.big_handle); 379 break; 380 default: 381 break; 382 } 383 break; 384 case HCI_EVENT_BIS_CAN_SEND_NOW: 385 bis_index = hci_event_bis_can_send_now_get_bis_index(packet); 386 le_audio_demo_util_source_send(bis_index, bis_con_handles[bis_index]); 387 bis_index++; 388 if (bis_index == num_bis){ 389 le_audio_demo_util_source_generate_iso_frame(audio_source); 390 hci_request_bis_can_send_now_events(big_params.big_handle); 391 } 392 break; 393 default: 394 break; 395 } 396 } 397 398 static void show_usage(void){ 399 printf("\n--- LE Audio Broadcast Source Test Console ---\n"); 400 print_config(); 401 printf("---\n"); 402 printf("c - toggle channels\n"); 403 printf("e - toggle encryption\n"); 404 printf("f - next sampling frequency\n"); 405 printf("v - next codec variant\n"); 406 printf("x - toggle sine / modplayer / recording\n"); 407 printf("s - start broadcast\n"); 408 printf("---\n"); 409 } 410 static void stdin_process(char c){ 411 switch (c){ 412 case 'c': 413 if (app_state != APP_IDLE){ 414 printf("Codec configuration can only be changed in idle state\n"); 415 break; 416 } 417 num_bis = 3 - num_bis; 418 print_config(); 419 break; 420 case 'e': 421 if (app_state != APP_IDLE){ 422 printf("Encryption can only be changed in idle state\n"); 423 break; 424 } 425 encryption = 1 - encryption; 426 print_config(); 427 break; 428 case 'f': 429 if (app_state != APP_IDLE){ 430 printf("Codec configuration can only be changed in idle state\n"); 431 break; 432 } 433 menu_sampling_frequency++; 434 if (menu_sampling_frequency >= 6){ 435 menu_sampling_frequency = 0; 436 } 437 if (menu_variant >= codec_configurations[menu_sampling_frequency].num_variants){ 438 menu_variant = 0; 439 } 440 print_config(); 441 break; 442 case 'v': 443 if (app_state != APP_IDLE){ 444 printf("Codec configuration can only be changed in idle state\n"); 445 break; 446 } 447 menu_variant++; 448 if (menu_variant >= codec_configurations[menu_sampling_frequency].num_variants){ 449 menu_variant = 0; 450 } 451 print_config(); 452 break; 453 case 's': 454 if (app_state != APP_IDLE){ 455 printf("Cannot start broadcast - not in idle state\n"); 456 break; 457 } 458 start_broadcast(); 459 break; 460 case 'x': 461 switch (audio_source){ 462 case AUDIO_SOURCE_MODPLAYER: 463 audio_source = AUDIO_SOURCE_SINE; 464 break; 465 case AUDIO_SOURCE_SINE: 466 audio_source = AUDIO_SOURCE_RECORDING; 467 break; 468 case AUDIO_SOURCE_RECORDING: 469 audio_source = AUDIO_SOURCE_MODPLAYER; 470 break; 471 default: 472 btstack_unreachable(); 473 break; 474 } 475 print_config(); 476 break; 477 case '\n': 478 case '\r': 479 break; 480 default: 481 show_usage(); 482 break; 483 } 484 } 485 486 int btstack_main(int argc, const char * argv[]); 487 int btstack_main(int argc, const char * argv[]){ 488 (void) argv; 489 (void) argc; 490 491 // register for HCI events 492 hci_event_callback_registration.callback = &packet_handler; 493 hci_add_event_handler(&hci_event_callback_registration); 494 495 // setup audio processing 496 le_audio_demo_util_source_init(); 497 498 // turn on! 499 hci_power_control(HCI_POWER_ON); 500 501 btstack_stdin_setup(stdin_process); 502 return 0; 503 } 504