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 // PTS mode 66 // #define PTS_MODE 67 68 // Count mode - send packet count as test data for manual analysis 69 // #define COUNT_MODE 70 71 // max config 72 #define MAX_NUM_BIS 2 73 #define MAX_SAMPLES_PER_FRAME 480 74 #define MAX_LC3_FRAME_BYTES 155 75 76 static const uint8_t adv_sid = 0; 77 78 static le_advertising_set_t le_advertising_set; 79 80 static le_extended_advertising_parameters_t extended_params = { 81 .advertising_event_properties = 0, 82 .primary_advertising_interval_min = 0x4b0, // 750 ms 83 .primary_advertising_interval_max = 0x4b0, // 750 ms 84 .primary_advertising_channel_map = 7, 85 .own_address_type = BD_ADDR_TYPE_LE_PUBLIC, 86 .peer_address_type = 0, 87 .peer_address = { 0 }, 88 .advertising_filter_policy = 0, 89 .advertising_tx_power = 10, // 10 dBm 90 .primary_advertising_phy = 1, // LE 1M PHY 91 .secondary_advertising_max_skip = 0, 92 .secondary_advertising_phy = 1, // LE 1M PHY 93 .advertising_sid = adv_sid, 94 .scan_request_notification_enable = 0, 95 }; 96 97 // Random Broadcast ID, valid for lifetime of BIG 98 #define BROADCAST_ID (0x112233u) 99 100 static const uint8_t extended_adv_data[] = { 101 // 16 bit service data, ORG_BLUETOOTH_SERVICE_BASIC_AUDIO_ANNOUNCEMENT_SERVICE, Broadcast ID 102 6, BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID, 0x52, 0x18, 103 BROADCAST_ID >> 16, 104 (BROADCAST_ID >> 8) & 0xff, 105 BROADCAST_ID & 0xff, 106 // name 107 #ifdef PTS_MODE 108 7, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'P', 'T', 'S', '-', 'x', 'x' 109 #elif defined(COUNT_MODE) 110 6, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'C', 'O', 'U', 'N', 'T' 111 #else 112 7, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'S', 'o', 'u', 'r', 'c', 'e' 113 #endif 114 }; 115 116 static const le_periodic_advertising_parameters_t periodic_params = { 117 .periodic_advertising_interval_min = 0x258, // 375 ms 118 .periodic_advertising_interval_max = 0x258, // 375 ms 119 .periodic_advertising_properties = 0 120 }; 121 122 static bd_addr_t remote; 123 static const char * remote_addr_string = "00:1B:DC:08:E2:72"; 124 125 static btstack_packet_callback_registration_t hci_event_callback_registration; 126 static uint8_t period_adv_data[255]; 127 static uint16_t period_adv_data_len; 128 129 static uint8_t adv_handle = 0; 130 static unsigned int next_bis_index; 131 static hci_con_handle_t bis_con_handles[MAX_NUM_BIS]; 132 static uint16_t packet_sequence_numbers[MAX_NUM_BIS]; 133 static uint8_t framed_pdus; 134 static bool bis_can_send[MAX_NUM_BIS]; 135 static bool bis_has_data[MAX_NUM_BIS]; 136 static uint8_t iso_frame_counter; 137 static uint16_t frame_duration_us; 138 139 static le_audio_big_t big_storage; 140 static le_audio_big_params_t big_params; 141 142 // time stamping 143 #ifdef COUNT_MODE 144 #define MAX_PACKET_INTERVAL_BINS_MS 50 145 static uint32_t send_time_bins[MAX_PACKET_INTERVAL_BINS_MS]; 146 static uint32_t send_last_ms; 147 #endif 148 149 // lc3 codec config 150 static uint16_t sampling_frequency_hz; 151 static btstack_lc3_frame_duration_t frame_duration; 152 static uint16_t number_samples_per_frame; 153 static uint16_t octets_per_frame; 154 static uint8_t num_bis = 1; 155 156 // codec menu 157 static uint8_t menu_sampling_frequency; 158 static uint8_t menu_variant; 159 160 // encryption 161 static uint8_t encryption = 0; 162 static uint8_t broadcast_code [] = {0x01, 0x02, 0x68, 0x05, 0x53, 0xF1, 0x41, 0x5A, 0xA2, 0x65, 0xBB, 0xAF, 0xC6, 0xEA, 0x03, 0xB8, }; 163 164 // audio producer 165 static le_audio_demo_source_generator audio_source = AUDIO_SOURCE_MODPLAYER; 166 167 static enum { 168 APP_IDLE, 169 APP_W4_CREATE_BIG_COMPLETE, 170 APP_STREAMING, 171 } app_state = APP_IDLE; 172 173 // enumerate default codec configs 174 static struct { 175 uint16_t samplingrate_hz; 176 uint8_t samplingrate_index; 177 uint8_t num_variants; 178 struct { 179 const char * name; 180 btstack_lc3_frame_duration_t frame_duration; 181 uint16_t octets_per_frame; 182 } variants[6]; 183 } codec_configurations[] = { 184 { 185 8000, 0x01, 2, 186 { 187 { "8_1", BTSTACK_LC3_FRAME_DURATION_7500US, 26}, 188 { "8_2", BTSTACK_LC3_FRAME_DURATION_10000US, 30} 189 } 190 }, 191 { 192 16000, 0x03, 2, 193 { 194 { "16_1", BTSTACK_LC3_FRAME_DURATION_7500US, 30}, 195 { "16_2", BTSTACK_LC3_FRAME_DURATION_10000US, 40} 196 } 197 }, 198 { 199 24000, 0x05, 2, 200 { 201 { "24_1", BTSTACK_LC3_FRAME_DURATION_7500US, 45}, 202 { "24_2", BTSTACK_LC3_FRAME_DURATION_10000US, 60} 203 } 204 }, 205 { 206 32000, 0x06, 2, 207 { 208 { "32_1", BTSTACK_LC3_FRAME_DURATION_7500US, 60}, 209 { "32_2", BTSTACK_LC3_FRAME_DURATION_10000US, 80} 210 } 211 }, 212 { 213 44100, 0x07, 2, 214 { 215 { "441_1", BTSTACK_LC3_FRAME_DURATION_7500US, 97}, 216 { "441_2", BTSTACK_LC3_FRAME_DURATION_10000US, 130} 217 } 218 }, 219 { 220 48000, 0x08, 6, 221 { 222 { "48_1", BTSTACK_LC3_FRAME_DURATION_7500US, 75}, 223 { "48_2", BTSTACK_LC3_FRAME_DURATION_10000US, 100}, 224 { "48_3", BTSTACK_LC3_FRAME_DURATION_7500US, 90}, 225 { "48_4", BTSTACK_LC3_FRAME_DURATION_10000US, 120}, 226 { "48_5", BTSTACK_LC3_FRAME_DURATION_7500US, 117}, 227 { "48_6", BTSTACK_LC3_FRAME_DURATION_10000US, 155} 228 } 229 }, 230 }; 231 232 static void show_usage(void); 233 234 static void print_config(void) { 235 printf("Config '%s_%u': %u, %s ms, %u octets - %s%s\n", 236 codec_configurations[menu_sampling_frequency].variants[menu_variant].name, 237 num_bis, 238 codec_configurations[menu_sampling_frequency].samplingrate_hz, 239 codec_configurations[menu_sampling_frequency].variants[menu_variant].frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10", 240 codec_configurations[menu_sampling_frequency].variants[menu_variant].octets_per_frame, 241 audio_source == AUDIO_SOURCE_SINE ? "Sine" : "Modplayer", encryption ? " (encrypted)" : ""); 242 } 243 244 static void setup_advertising() { 245 bd_addr_t local_addr; 246 gap_local_bd_addr(local_addr); 247 bool local_address_invalid = btstack_is_null_bd_addr( local_addr ); 248 if( local_address_invalid ) { 249 extended_params.own_address_type = BD_ADDR_TYPE_LE_RANDOM; 250 } 251 gap_extended_advertising_setup(&le_advertising_set, &extended_params, &adv_handle); 252 if( local_address_invalid ) { 253 bd_addr_t random_address = { 0xC1, 0x01, 0x01, 0x01, 0x01, 0x01 }; 254 gap_extended_advertising_set_random_address( adv_handle, random_address ); 255 } 256 gap_extended_advertising_set_adv_data(adv_handle, sizeof(extended_adv_data), extended_adv_data); 257 gap_periodic_advertising_set_params(adv_handle, &periodic_params); 258 gap_periodic_advertising_set_data(adv_handle, period_adv_data_len, period_adv_data); 259 gap_periodic_advertising_start(adv_handle, 0); 260 gap_extended_advertising_start(adv_handle, 0, 0); 261 } 262 263 static void setup_big(void){ 264 // Create BIG 265 big_params.big_handle = 0; 266 big_params.advertising_handle = adv_handle; 267 big_params.num_bis = num_bis; 268 big_params.max_sdu = octets_per_frame; 269 big_params.max_transport_latency_ms = 31; 270 big_params.rtn = 2; 271 big_params.phy = 2; 272 big_params.packing = 0; 273 big_params.encryption = encryption; 274 if (encryption) { 275 memcpy(big_params.broadcast_code, &broadcast_code[0], 16); 276 } else { 277 memset(big_params.broadcast_code, 0, 16); 278 } 279 if (sampling_frequency_hz == 44100){ 280 // same config as for 48k -> frame is longer by 48/44.1 281 big_params.sdu_interval_us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 8163 : 10884; 282 big_params.framing = 1; 283 } else { 284 big_params.sdu_interval_us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 7500 : 10000; 285 big_params.framing = 0; 286 } 287 app_state = APP_W4_CREATE_BIG_COMPLETE; 288 gap_big_create(&big_storage, &big_params); 289 } 290 291 292 static void start_broadcast() {// use values from table 293 sampling_frequency_hz = codec_configurations[menu_sampling_frequency].samplingrate_hz; 294 octets_per_frame = codec_configurations[menu_sampling_frequency].variants[menu_variant].octets_per_frame; 295 frame_duration = codec_configurations[menu_sampling_frequency].variants[menu_variant].frame_duration; 296 297 number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration); 298 299 printf("LC3 Encoder config: %u hz, frame duration %s ms, num samples %u, num octets %u\n", 300 sampling_frequency_hz, frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10", 301 number_samples_per_frame, octets_per_frame); 302 303 le_audio_demo_util_source_configure(num_bis, 1, sampling_frequency_hz, frame_duration, octets_per_frame); 304 le_audio_demo_util_source_generate_iso_frame(audio_source); 305 306 // setup base 307 uint8_t codec_id[] = { 0x06, 0x00, 0x00, 0x00, 0x00 }; 308 uint8_t subgroup_codec_specific_configuration[] = { 309 0x02, 0x01, 0x01, 310 0x02, 0x02, 0x01, 311 0x03, 0x04, 0x1E, 0x00, 312 }; 313 subgroup_codec_specific_configuration[2] = codec_configurations[menu_sampling_frequency].samplingrate_index; 314 subgroup_codec_specific_configuration[5] = (frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US) ? 0 : 1;; 315 uint8_t subgroup_metadata[] = { 316 0x03, 0x02, 0x04, 0x00, // Metadata[i] 317 }; 318 little_endian_store_16(subgroup_codec_specific_configuration, 8, octets_per_frame); 319 uint8_t bis_codec_specific_configuration_1[] = { 320 0x05, 0x03, 0x01, 0x00, 0x00, 0x00 321 }; 322 uint8_t bis_codec_specific_configuration_2[] = { 323 0x05, 0x03, 0x02, 0x00, 0x00, 0x00 324 }; 325 le_audio_base_builder_t builder; 326 le_audio_base_builder_init(&builder, period_adv_data, sizeof(period_adv_data), 40); 327 le_audio_base_builder_add_subgroup(&builder, codec_id, 328 sizeof(subgroup_codec_specific_configuration), 329 subgroup_codec_specific_configuration, 330 sizeof(subgroup_metadata), subgroup_metadata); 331 le_audio_base_builder_add_bis(&builder, 1, sizeof(bis_codec_specific_configuration_1), 332 bis_codec_specific_configuration_1); 333 if (num_bis == 2){ 334 le_audio_base_builder_add_bis(&builder, 2, sizeof(bis_codec_specific_configuration_2), 335 bis_codec_specific_configuration_2); 336 } 337 period_adv_data_len = le_audio_base_builder_get_ad_data_size(&builder); 338 339 // setup extended and periodic advertising 340 setup_advertising(); 341 342 // setup big 343 setup_big(); 344 } 345 346 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 347 UNUSED(channel); 348 if (packet_type != HCI_EVENT_PACKET) return; 349 uint8_t bis_index; 350 351 switch (packet[0]) { 352 case BTSTACK_EVENT_STATE: 353 switch(btstack_event_state_get_state(packet)) { 354 case HCI_STATE_WORKING: 355 #ifdef ENABLE_DEMO_MODE 356 // start broadcast automatically, mod player, 48_5_1 357 num_bis = 1; 358 menu_sampling_frequency = 5; 359 menu_variant = 4; 360 start_broadcast(); 361 #else 362 show_usage(); 363 printf("Please select sample frequency and variation, then start broadcast\n"); 364 #endif 365 break; 366 case HCI_STATE_OFF: 367 printf("Goodbye\n"); 368 exit(0); 369 break; 370 default: 371 break; 372 } 373 break; 374 case HCI_EVENT_META_GAP: 375 switch (hci_event_gap_meta_get_subevent_code(packet)){ 376 case GAP_SUBEVENT_BIG_CREATED: 377 printf("BIG Created with BIS Connection handles: \n"); 378 for (bis_index=0;bis_index<num_bis;bis_index++){ 379 bis_con_handles[bis_index] = gap_subevent_big_created_get_bis_con_handles(packet, bis_index); 380 printf("0x%04x ", bis_con_handles[bis_index]); 381 } 382 383 app_state = APP_STREAMING; 384 printf("Start streaming\n"); 385 hci_request_bis_can_send_now_events(big_params.big_handle); 386 break; 387 default: 388 break; 389 } 390 break; 391 case HCI_EVENT_BIS_CAN_SEND_NOW: 392 bis_index = hci_event_bis_can_send_now_get_bis_index(packet); 393 le_audio_demo_util_source_send(bis_index, bis_con_handles[bis_index]); 394 bis_index++; 395 if (bis_index == num_bis){ 396 le_audio_demo_util_source_generate_iso_frame(audio_source); 397 hci_request_bis_can_send_now_events(big_params.big_handle); 398 } 399 break; 400 default: 401 break; 402 } 403 } 404 405 static void show_usage(void){ 406 printf("\n--- LE Audio Broadcast Source Test Console ---\n"); 407 print_config(); 408 printf("---\n"); 409 printf("c - toggle channels\n"); 410 printf("e - toggle encryption\n"); 411 printf("f - next sampling frequency\n"); 412 printf("v - next codec variant\n"); 413 printf("t - toggle sine / modplayer\n"); 414 printf("s - start broadcast\n"); 415 printf("---\n"); 416 } 417 static void stdin_process(char c){ 418 switch (c){ 419 case 'c': 420 if (app_state != APP_IDLE){ 421 printf("Codec configuration can only be changed in idle state\n"); 422 break; 423 } 424 num_bis = 3 - num_bis; 425 print_config(); 426 break; 427 case 'e': 428 if (app_state != APP_IDLE){ 429 printf("Encryption can only be changed in idle state\n"); 430 break; 431 } 432 encryption = 1 - encryption; 433 print_config(); 434 break; 435 case 'f': 436 if (app_state != APP_IDLE){ 437 printf("Codec configuration can only be changed in idle state\n"); 438 break; 439 } 440 menu_sampling_frequency++; 441 if (menu_sampling_frequency >= 6){ 442 menu_sampling_frequency = 0; 443 } 444 if (menu_variant >= codec_configurations[menu_sampling_frequency].num_variants){ 445 menu_variant = 0; 446 } 447 print_config(); 448 break; 449 case 'v': 450 if (app_state != APP_IDLE){ 451 printf("Codec configuration can only be changed in idle state\n"); 452 break; 453 } 454 menu_variant++; 455 if (menu_variant >= codec_configurations[menu_sampling_frequency].num_variants){ 456 menu_variant = 0; 457 } 458 print_config(); 459 break; 460 case 's': 461 if (app_state != APP_IDLE){ 462 printf("Cannot start broadcast - not in idle state\n"); 463 break; 464 } 465 start_broadcast(); 466 break; 467 case 't': 468 audio_source = 1 - audio_source; 469 print_config(); 470 break; 471 case '\n': 472 case '\r': 473 break; 474 default: 475 show_usage(); 476 break; 477 } 478 } 479 480 int btstack_main(int argc, const char * argv[]); 481 int btstack_main(int argc, const char * argv[]){ 482 (void) argv; 483 (void) argc; 484 485 // register for HCI events 486 hci_event_callback_registration.callback = &packet_handler; 487 hci_add_event_handler(&hci_event_callback_registration); 488 489 // setup audio processing 490 le_audio_demo_util_source_init(); 491 492 // turn on! 493 hci_power_control(HCI_POWER_ON); 494 495 btstack_stdin_setup(stdin_process); 496 return 0; 497 } 498