1 /* 2 * Copyright (C) 2014 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 BLUEKITCHEN 24 * GMBH 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__ "hfp.c" 39 40 41 #include "btstack_config.h" 42 43 #include <stdint.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <inttypes.h> 47 48 #include "bluetooth_sdp.h" 49 #include "btstack_debug.h" 50 #include "btstack_event.h" 51 #include "btstack_memory.h" 52 #include "btstack_run_loop.h" 53 #include "classic/sdp_client_rfcomm.h" 54 #include "classic/sdp_server.h" 55 #include "classic/sdp_util.h" 56 #include "classic/sdp_client.h" 57 #include "hci.h" 58 #include "hci_cmd.h" 59 #include "hci_dump.h" 60 61 #if defined(ENABLE_CC256X_ASSISTED_HFP) && !defined(ENABLE_SCO_OVER_PCM) 62 #error "Assisted HFP is only possible over PCM/I2S. Please add define: ENABLE_SCO_OVER_PCM" 63 #endif 64 65 #if defined(ENABLE_BCM_PCM_WBS) && !defined(ENABLE_SCO_OVER_PCM) 66 #error "WBS for PCM is only possible over PCM/I2S. Please add define: ENABLE_SCO_OVER_PCM" 67 #endif 68 69 #define HFP_HF_FEATURES_SIZE 10 70 #define HFP_AG_FEATURES_SIZE 12 71 72 typedef struct { 73 hfp_role_t local_role; 74 bd_addr_t remote_address; 75 } hfp_sdp_query_context_t; 76 77 // globals 78 79 static btstack_linked_list_t hfp_connections ; 80 81 static btstack_packet_handler_t hfp_hf_callback; 82 static btstack_packet_handler_t hfp_ag_callback; 83 84 static btstack_packet_handler_t hfp_hf_rfcomm_packet_handler; 85 static btstack_packet_handler_t hfp_ag_rfcomm_packet_handler; 86 87 static uint16_t hfp_allowed_sco_packet_types; 88 static hfp_connection_t * hfp_sco_establishment_active; 89 90 static hfp_sdp_query_context_t hfp_sdp_query_context; 91 static btstack_context_callback_registration_t hfp_sdp_query_request; 92 93 94 95 96 97 98 // prototypes 99 static hfp_link_settings_t hfp_next_link_setting_for_connection(hfp_link_settings_t current_setting, hfp_connection_t * hfp_connection, uint8_t eSCO_S4_supported); 100 static void parse_sequence(hfp_connection_t * context); 101 102 static const char * hfp_hf_features[] = { 103 "EC and/or NR function", 104 "Three-way calling", 105 "CLI presentation capability", 106 "Voice recognition activation", 107 "Remote volume control", 108 109 "Enhanced call status", 110 "Enhanced call control", 111 112 "Codec negotiation", 113 114 "HF Indicators", 115 "eSCO S4 (and T2) Settings Supported", 116 "Reserved for future definition" 117 }; 118 119 static const char * hfp_ag_features[] = { 120 "Three-way calling", 121 "EC and/or NR function", 122 "Voice recognition function", 123 "In-band ring tone capability", 124 "Attach a number to a voice tag", 125 "Ability to reject a call", 126 "Enhanced call status", 127 "Enhanced call control", 128 "Extended Error Result Codes", 129 "Codec negotiation", 130 "HF Indicators", 131 "eSCO S4 (and T2) Settings Supported", 132 "Reserved for future definition" 133 }; 134 135 static const char * hfp_enhanced_call_dir[] = { 136 "outgoing", 137 "incoming" 138 }; 139 140 static const char * hfp_enhanced_call_status[] = { 141 "active", 142 "held", 143 "outgoing dialing", 144 "outgoing alerting", 145 "incoming", 146 "incoming waiting", 147 "call held by response and hold" 148 }; 149 150 static const char * hfp_enhanced_call_mode[] = { 151 "voice", 152 "data", 153 "fax" 154 }; 155 156 static const char * hfp_enhanced_call_mpty[] = { 157 "not a conference call", 158 "conference call" 159 }; 160 161 const char * hfp_enhanced_call_dir2str(uint16_t index){ 162 if (index <= HFP_ENHANCED_CALL_DIR_INCOMING) return hfp_enhanced_call_dir[index]; 163 return "not defined"; 164 } 165 166 const char * hfp_enhanced_call_status2str(uint16_t index){ 167 if (index <= HFP_ENHANCED_CALL_STATUS_CALL_HELD_BY_RESPONSE_AND_HOLD) return hfp_enhanced_call_status[index]; 168 return "not defined"; 169 } 170 171 const char * hfp_enhanced_call_mode2str(uint16_t index){ 172 if (index <= HFP_ENHANCED_CALL_MODE_FAX) return hfp_enhanced_call_mode[index]; 173 return "not defined"; 174 } 175 176 const char * hfp_enhanced_call_mpty2str(uint16_t index){ 177 if (index <= HFP_ENHANCED_CALL_MPTY_CONFERENCE_CALL) return hfp_enhanced_call_mpty[index]; 178 return "not defined"; 179 } 180 181 static uint16_t hfp_parse_indicator_index(hfp_connection_t * hfp_connection){ 182 uint16_t index = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 183 184 if (index > HFP_MAX_NUM_INDICATORS){ 185 log_info("ignoring invalid indicator index bigger then HFP_MAX_NUM_INDICATORS"); 186 return HFP_MAX_NUM_INDICATORS - 1; 187 } 188 189 // indicator index enumeration starts with 1, we substract 1 to store in array with starting index 0 190 if (index > 0){ 191 index -= 1; 192 } else { 193 log_info("ignoring invalid indicator index 0"); 194 return 0; 195 } 196 return index; 197 } 198 199 static void hfp_next_indicators_index(hfp_connection_t * hfp_connection){ 200 if (hfp_connection->parser_item_index < HFP_MAX_NUM_INDICATORS - 1){ 201 hfp_connection->parser_item_index++; 202 } else { 203 log_info("Ignoring additional indicator"); 204 } 205 } 206 207 static void hfp_next_codec_index(hfp_connection_t * hfp_connection){ 208 if (hfp_connection->parser_item_index < HFP_MAX_NUM_CODECS - 1){ 209 hfp_connection->parser_item_index++; 210 } else { 211 log_info("Ignoring additional codec index"); 212 } 213 } 214 215 static void hfp_next_remote_call_services_index(hfp_connection_t * hfp_connection){ 216 if (hfp_connection->remote_call_services_index < HFP_MAX_NUM_CALL_SERVICES - 1){ 217 hfp_connection->remote_call_services_index++; 218 } else { 219 log_info("Ignoring additional remote_call_services"); 220 } 221 } 222 223 const char * hfp_hf_feature(int index){ 224 if (index > HFP_HF_FEATURES_SIZE){ 225 return hfp_hf_features[HFP_HF_FEATURES_SIZE]; 226 } 227 return hfp_hf_features[index]; 228 } 229 230 const char * hfp_ag_feature(int index){ 231 if (index > HFP_AG_FEATURES_SIZE){ 232 return hfp_ag_features[HFP_AG_FEATURES_SIZE]; 233 } 234 return hfp_ag_features[index]; 235 } 236 237 int send_str_over_rfcomm(uint16_t cid, char * command){ 238 if (!rfcomm_can_send_packet_now(cid)) return 1; 239 log_info("HFP_TX %s", command); 240 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 241 if (err){ 242 log_error("rfcomm_send -> error 0x%02x \n", err); 243 } 244 #ifdef ENABLE_HFP_AT_MESSAGES 245 hfp_connection_t * hfp_connection = get_hfp_connection_context_for_rfcomm_cid(cid); 246 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_SENT, command); 247 #endif 248 return 1; 249 } 250 251 int hfp_supports_codec(uint8_t codec, int codecs_nr, uint8_t * codecs){ 252 253 // mSBC requires support for eSCO connections 254 if ((codec == HFP_CODEC_MSBC) && !hci_extended_sco_link_supported()) return 0; 255 256 int i; 257 for (i = 0; i < codecs_nr; i++){ 258 if (codecs[i] != codec) continue; 259 return 1; 260 } 261 return 0; 262 } 263 264 void hfp_hf_drop_mSBC_if_eSCO_not_supported(uint8_t * codecs, uint8_t * codecs_nr){ 265 if (hci_extended_sco_link_supported()) return; 266 uint8_t tmp_codecs[HFP_MAX_NUM_CODECS]; 267 int i; 268 int tmp_codec_nr = 0; 269 for (i=0; i < *codecs_nr; i++){ 270 if (codecs[i] == HFP_CODEC_MSBC) continue; 271 tmp_codecs[tmp_codec_nr++] = codecs[i]; 272 } 273 *codecs_nr = tmp_codec_nr; 274 (void)memcpy(codecs, tmp_codecs, tmp_codec_nr); 275 } 276 277 // UTILS 278 int get_bit(uint16_t bitmap, int position){ 279 return (bitmap >> position) & 1; 280 } 281 282 int store_bit(uint32_t bitmap, int position, uint8_t value){ 283 if (value){ 284 bitmap |= 1 << position; 285 } else { 286 bitmap &= ~ (1 << position); 287 } 288 return bitmap; 289 } 290 291 int join(char * buffer, int buffer_size, uint8_t * values, int values_nr){ 292 if (buffer_size < (values_nr * 3)) return 0; 293 int i; 294 int offset = 0; 295 for (i = 0; i < (values_nr-1); i++) { 296 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", values[i]); // puts string into buffer 297 } 298 if (i<values_nr){ 299 offset += snprintf(buffer+offset, buffer_size-offset, "%d", values[i]); 300 } 301 return offset; 302 } 303 304 int join_bitmap(char * buffer, int buffer_size, uint32_t values, int values_nr){ 305 if (buffer_size < (values_nr * 3)) return 0; 306 307 int i; 308 int offset = 0; 309 for (i = 0; i < (values_nr-1); i++) { 310 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", get_bit(values,i)); // puts string into buffer 311 } 312 313 if (i<values_nr){ 314 offset += snprintf(buffer+offset, buffer_size-offset, "%d", get_bit(values,i)); 315 } 316 return offset; 317 } 318 319 static void hfp_emit_event_for_context(hfp_connection_t * hfp_connection, uint8_t * packet, uint16_t size){ 320 if (!hfp_connection) return; 321 btstack_packet_handler_t callback = NULL; 322 switch (hfp_connection->local_role){ 323 case HFP_ROLE_HF: 324 callback = hfp_hf_callback; 325 break; 326 case HFP_ROLE_AG: 327 callback = hfp_ag_callback; 328 break; 329 default: 330 return; 331 } 332 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 333 } 334 335 void hfp_emit_simple_event(hfp_connection_t * hfp_connection, uint8_t event_subtype){ 336 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 337 uint8_t event[5]; 338 event[0] = HCI_EVENT_HFP_META; 339 event[1] = sizeof(event) - 2; 340 event[2] = event_subtype; 341 little_endian_store_16(event, 3, acl_handle); 342 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 343 } 344 345 void hfp_emit_event(hfp_connection_t * hfp_connection, uint8_t event_subtype, uint8_t value){ 346 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 347 uint8_t event[6]; 348 event[0] = HCI_EVENT_HFP_META; 349 event[1] = sizeof(event) - 2; 350 event[2] = event_subtype; 351 little_endian_store_16(event, 3, acl_handle); 352 event[5] = value; // status 0 == OK 353 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 354 } 355 356 void hfp_emit_voice_recognition_enabled(hfp_connection_t * hfp_connection, uint8_t status){ 357 btstack_assert(hfp_connection != NULL); 358 359 uint8_t event[7]; 360 event[0] = HCI_EVENT_HFP_META; 361 event[1] = sizeof(event) - 2; 362 event[2] = HFP_SUBEVENT_VOICE_RECOGNITION_ACTIVATED; 363 364 little_endian_store_16(event, 3, hfp_connection->acl_handle); 365 event[5] = status; // 0:success 366 event[6] = hfp_connection->enhanced_voice_recognition_enabled ? 1 : 0; 367 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 368 } 369 370 void hfp_emit_voice_recognition_disabled(hfp_connection_t * hfp_connection, uint8_t status){ 371 btstack_assert(hfp_connection != NULL); 372 373 uint8_t event[6]; 374 event[0] = HCI_EVENT_HFP_META; 375 event[1] = sizeof(event) - 2; 376 event[2] = HFP_SUBEVENT_VOICE_RECOGNITION_DEACTIVATED; 377 378 little_endian_store_16(event, 3, hfp_connection->acl_handle); 379 event[5] = status; // 0:success 380 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 381 } 382 383 void hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection_t * hfp_connection, uint8_t status){ 384 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 385 386 uint8_t event[6]; 387 event[0] = HCI_EVENT_HFP_META; 388 event[1] = sizeof(event) - 2; 389 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_HF_READY_FOR_AUDIO; 390 little_endian_store_16(event, 3, acl_handle); 391 event[5] = status; 392 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 393 } 394 395 void hfp_emit_enhanced_voice_recognition_state_event(hfp_connection_t * hfp_connection, uint8_t status){ 396 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 397 398 uint8_t event[6]; 399 event[0] = HCI_EVENT_HFP_META; 400 event[1] = sizeof(event) - 2; 401 switch (hfp_connection->ag_vra_state){ 402 case HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT: 403 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_READY_TO_ACCEPT_AUDIO_INPUT; 404 break; 405 case HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND: 406 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_IS_STARTING_SOUND; 407 break; 408 case HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT: 409 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_IS_PROCESSING_AUDIO_INPUT; 410 break; 411 default: 412 btstack_unreachable(); 413 break; 414 } 415 416 little_endian_store_16(event, 3, acl_handle); 417 event[5] = status; 418 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 419 } 420 421 void hfp_emit_slc_connection_event(hfp_connection_t * hfp_connection, uint8_t status, hci_con_handle_t con_handle, bd_addr_t addr){ 422 btstack_assert(hfp_connection != NULL); 423 uint8_t event[12]; 424 int pos = 0; 425 event[pos++] = HCI_EVENT_HFP_META; 426 event[pos++] = sizeof(event) - 2; 427 event[pos++] = HFP_SUBEVENT_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 428 little_endian_store_16(event, pos, con_handle); 429 pos += 2; 430 event[pos++] = status; // status 0 == OK 431 reverse_bd_addr(addr,&event[pos]); 432 pos += 6; 433 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 434 } 435 436 static void hfp_emit_audio_connection_released(hfp_connection_t * hfp_connection, hci_con_handle_t sco_handle){ 437 btstack_assert(hfp_connection != NULL); 438 uint8_t event[7]; 439 int pos = 0; 440 event[pos++] = HCI_EVENT_HFP_META; 441 event[pos++] = sizeof(event) - 2; 442 event[pos++] = HFP_SUBEVENT_AUDIO_CONNECTION_RELEASED; 443 little_endian_store_16(event, pos, hfp_connection->acl_handle); 444 pos += 2; 445 little_endian_store_16(event, pos, sco_handle); 446 pos += 2; 447 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 448 } 449 450 void hfp_emit_sco_event(hfp_connection_t * hfp_connection, uint8_t status, hci_con_handle_t sco_handle, bd_addr_t addr, uint8_t negotiated_codec){ 451 btstack_assert(hfp_connection != NULL); 452 uint8_t event[15]; 453 int pos = 0; 454 event[pos++] = HCI_EVENT_HFP_META; 455 event[pos++] = sizeof(event) - 2; 456 event[pos++] = HFP_SUBEVENT_AUDIO_CONNECTION_ESTABLISHED; 457 little_endian_store_16(event, pos, hfp_connection->acl_handle); 458 pos += 2; 459 event[pos++] = status; // status 0 == OK 460 little_endian_store_16(event, pos, sco_handle); 461 pos += 2; 462 reverse_bd_addr(addr,&event[pos]); 463 pos += 6; 464 event[pos++] = negotiated_codec; 465 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 466 } 467 468 void hfp_emit_string_event(hfp_connection_t * hfp_connection, uint8_t event_subtype, const char * value){ 469 btstack_assert(hfp_connection != NULL); 470 #ifdef ENABLE_HFP_AT_MESSAGES 471 uint8_t event[256]; 472 #else 473 uint8_t event[40]; 474 #endif 475 event[0] = HCI_EVENT_HFP_META; 476 event[1] = sizeof(event) - 2; 477 event[2] = event_subtype; 478 little_endian_store_16(event, 3, hfp_connection->acl_handle); 479 uint16_t size = btstack_min(strlen(value), sizeof(event) - 6); 480 strncpy((char*)&event[5], value, size); 481 event[5 + size] = 0; 482 hfp_emit_event_for_context(hfp_connection, event, sizeof(event)); 483 } 484 485 btstack_linked_list_t * hfp_get_connections(void){ 486 return (btstack_linked_list_t *) &hfp_connections; 487 } 488 489 hfp_connection_t * get_hfp_connection_context_for_rfcomm_cid(uint16_t cid){ 490 btstack_linked_list_iterator_t it; 491 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 492 while (btstack_linked_list_iterator_has_next(&it)){ 493 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 494 if (hfp_connection->rfcomm_cid == cid){ 495 return hfp_connection; 496 } 497 } 498 return NULL; 499 } 500 501 hfp_connection_t * get_hfp_connection_context_for_bd_addr(bd_addr_t bd_addr, hfp_role_t hfp_role){ 502 btstack_linked_list_iterator_t it; 503 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 504 while (btstack_linked_list_iterator_has_next(&it)){ 505 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 506 if ((memcmp(hfp_connection->remote_addr, bd_addr, 6) == 0) && (hfp_connection->local_role == hfp_role)) { 507 return hfp_connection; 508 } 509 } 510 return NULL; 511 } 512 513 hfp_connection_t * get_hfp_connection_context_for_sco_handle(uint16_t handle, hfp_role_t hfp_role){ 514 btstack_linked_list_iterator_t it; 515 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 516 while (btstack_linked_list_iterator_has_next(&it)){ 517 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 518 if ((hfp_connection->sco_handle == handle) && (hfp_connection->local_role == hfp_role)){ 519 return hfp_connection; 520 } 521 } 522 return NULL; 523 } 524 525 hfp_connection_t * get_hfp_connection_context_for_acl_handle(uint16_t handle, hfp_role_t hfp_role){ 526 btstack_linked_list_iterator_t it; 527 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 528 while (btstack_linked_list_iterator_has_next(&it)){ 529 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 530 if ((hfp_connection->acl_handle == handle) && (hfp_connection->local_role == hfp_role)){ 531 return hfp_connection; 532 } 533 } 534 return NULL; 535 } 536 537 538 static void hfp_reset_voice_recognition(hfp_connection_t * hfp_connection){ 539 btstack_assert(hfp_connection != NULL); 540 hfp_voice_recognition_activation_status_t current_vra_state = hfp_connection->vra_state; 541 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 542 543 if (current_vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 544 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 545 } else if (hfp_connection->vra_state_requested != HFP_VRA_VOICE_RECOGNITION_OFF){ 546 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 547 } 548 549 hfp_connection->vra_state_requested = HFP_VRA_VOICE_RECOGNITION_OFF; 550 hfp_connection->activate_voice_recognition = false; 551 hfp_connection->deactivate_voice_recognition = false; 552 hfp_connection->enhanced_voice_recognition_enabled = false; 553 hfp_connection->ag_vra_status = 0; 554 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 555 } 556 557 void hfp_reset_context_flags(hfp_connection_t * hfp_connection){ 558 if (!hfp_connection) return; 559 hfp_connection->ok_pending = 0; 560 hfp_connection->send_error = 0; 561 562 hfp_connection->found_equal_sign = false; 563 564 hfp_connection->change_status_update_for_individual_ag_indicators = 0; 565 hfp_connection->operator_name_changed = 0; 566 567 hfp_connection->enable_extended_audio_gateway_error_report = 0; 568 hfp_connection->extended_audio_gateway_error = 0; 569 570 // establish codecs hfp_connection 571 hfp_connection->suggested_codec = 0; 572 hfp_connection->negotiated_codec = 0; 573 hfp_connection->codec_confirmed = 0; 574 575 hfp_connection->establish_audio_connection = 0; 576 hfp_connection->call_waiting_notification_enabled = 0; 577 hfp_connection->command = HFP_CMD_NONE; 578 hfp_connection->enable_status_update_for_ag_indicators = 0xFF; 579 hfp_reset_voice_recognition(hfp_connection); 580 } 581 582 static hfp_connection_t * create_hfp_connection_context(void){ 583 hfp_connection_t * hfp_connection = btstack_memory_hfp_connection_get(); 584 if (!hfp_connection) return NULL; 585 586 hfp_connection->state = HFP_IDLE; 587 hfp_connection->call_state = HFP_CALL_IDLE; 588 hfp_connection->codecs_state = HFP_CODECS_IDLE; 589 590 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 591 hfp_connection->command = HFP_CMD_NONE; 592 593 hfp_connection->acl_handle = HCI_CON_HANDLE_INVALID; 594 hfp_connection->sco_handle = HCI_CON_HANDLE_INVALID; 595 596 hfp_reset_context_flags(hfp_connection); 597 598 btstack_linked_list_add(&hfp_connections, (btstack_linked_item_t*)hfp_connection); 599 return hfp_connection; 600 } 601 602 void hfp_finalize_connection_context(hfp_connection_t * hfp_connection){ 603 btstack_linked_list_remove(&hfp_connections, (btstack_linked_item_t*) hfp_connection); 604 btstack_memory_hfp_connection_free(hfp_connection); 605 } 606 607 static hfp_connection_t * hfp_create_connection(bd_addr_t bd_addr, hfp_role_t local_role){ 608 hfp_connection_t * hfp_connection = get_hfp_connection_context_for_bd_addr(bd_addr, local_role); 609 if (hfp_connection) return hfp_connection; 610 hfp_connection = create_hfp_connection_context(); 611 (void)memcpy(hfp_connection->remote_addr, bd_addr, 6); 612 hfp_connection->local_role = local_role; 613 log_info("Create HFP context %p: role %u, addr %s", hfp_connection, local_role, bd_addr_to_str(bd_addr)); 614 615 return hfp_connection; 616 } 617 618 /* @param network. 619 * 0 == no ability to reject a call. 620 * 1 == ability to reject a call. 621 */ 622 623 /* @param suported_features 624 * HF bit 0: EC and/or NR function (yes/no, 1 = yes, 0 = no) 625 * HF bit 1: Call waiting or three-way calling(yes/no, 1 = yes, 0 = no) 626 * HF bit 2: CLI presentation capability (yes/no, 1 = yes, 0 = no) 627 * HF bit 3: Voice recognition activation (yes/no, 1= yes, 0 = no) 628 * HF bit 4: Remote volume control (yes/no, 1 = yes, 0 = no) 629 * HF bit 5: Wide band speech (yes/no, 1 = yes, 0 = no) 630 */ 631 /* Bit position: 632 * AG bit 0: Three-way calling (yes/no, 1 = yes, 0 = no) 633 * AG bit 1: EC and/or NR function (yes/no, 1 = yes, 0 = no) 634 * AG bit 2: Voice recognition function (yes/no, 1 = yes, 0 = no) 635 * AG bit 3: In-band ring tone capability (yes/no, 1 = yes, 0 = no) 636 * AG bit 4: Attach a phone number to a voice tag (yes/no, 1 = yes, 0 = no) 637 * AG bit 5: Wide band speech (yes/no, 1 = yes, 0 = no) 638 */ 639 640 void hfp_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t service_uuid, int rfcomm_channel_nr, const char * name){ 641 uint8_t* attribute; 642 de_create_sequence(service); 643 644 // 0x0000 "Service Record Handle" 645 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 646 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 647 648 // 0x0001 "Service Class ID List" 649 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 650 attribute = de_push_sequence(service); 651 { 652 // "UUID for Service" 653 de_add_number(attribute, DE_UUID, DE_SIZE_16, service_uuid); 654 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO); 655 } 656 de_pop_sequence(service, attribute); 657 658 // 0x0004 "Protocol Descriptor List" 659 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 660 attribute = de_push_sequence(service); 661 { 662 uint8_t* l2cpProtocol = de_push_sequence(attribute); 663 { 664 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 665 } 666 de_pop_sequence(attribute, l2cpProtocol); 667 668 uint8_t* rfcomm = de_push_sequence(attribute); 669 { 670 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_RFCOMM); // rfcomm_service 671 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 672 } 673 de_pop_sequence(attribute, rfcomm); 674 } 675 de_pop_sequence(service, attribute); 676 677 678 // 0x0005 "Public Browse Group" 679 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 680 attribute = de_push_sequence(service); 681 { 682 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 683 } 684 de_pop_sequence(service, attribute); 685 686 // 0x0009 "Bluetooth Profile Descriptor List" 687 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 688 attribute = de_push_sequence(service); 689 { 690 uint8_t *sppProfile = de_push_sequence(attribute); 691 { 692 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_HANDSFREE); 693 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0108); // Verision 1.8 694 } 695 de_pop_sequence(attribute, sppProfile); 696 } 697 de_pop_sequence(service, attribute); 698 699 // 0x0100 "Service Name" 700 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 701 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 702 } 703 704 static void handle_query_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 705 UNUSED(packet_type); // ok: handling own sdp events 706 UNUSED(channel); // ok: no channel 707 UNUSED(size); // ok: handling own sdp events 708 709 hfp_connection_t * hfp_connection = get_hfp_connection_context_for_bd_addr(hfp_sdp_query_context.remote_address, hfp_sdp_query_context.local_role); 710 if (hfp_connection == NULL) { 711 log_info("connection with %s and local role %d not found", hfp_sdp_query_context.remote_address, hfp_sdp_query_context.local_role); 712 return; 713 } 714 715 switch (hci_event_packet_get_type(packet)){ 716 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 717 hfp_connection->rfcomm_channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 718 break; 719 case SDP_EVENT_QUERY_COMPLETE: 720 if (hfp_connection->rfcomm_channel_nr > 0){ 721 hfp_connection->state = HFP_W4_RFCOMM_CONNECTED; 722 btstack_packet_handler_t packet_handler; 723 switch (hfp_connection->local_role){ 724 case HFP_ROLE_AG: 725 packet_handler = hfp_ag_rfcomm_packet_handler; 726 break; 727 case HFP_ROLE_HF: 728 packet_handler = hfp_hf_rfcomm_packet_handler; 729 break; 730 default: 731 btstack_assert(false); 732 return; 733 } 734 735 rfcomm_create_channel(packet_handler, hfp_connection->remote_addr, hfp_connection->rfcomm_channel_nr, NULL); 736 737 } else { 738 hfp_connection->state = HFP_IDLE; 739 uint8_t status = sdp_event_query_complete_get_status(packet); 740 if (status == ERROR_CODE_SUCCESS){ 741 // report service not found 742 status = SDP_SERVICE_NOT_FOUND; 743 } 744 hfp_emit_slc_connection_event(hfp_connection, status, HCI_CON_HANDLE_INVALID, hfp_connection->remote_addr); 745 log_info("rfcomm service not found, status 0x%02x", status); 746 } 747 748 // register the SDP Query request to check if there is another connection waiting for the query 749 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 750 (void) sdp_client_register_query_callback(&hfp_sdp_query_request); 751 break; 752 default: 753 break; 754 } 755 } 756 757 // returns 0 if unexpected error or no other link options remained, otherwise 1 758 static int hfp_handle_failed_sco_connection(uint8_t status){ 759 760 if (!hfp_sco_establishment_active){ 761 log_info("(e)SCO Connection failed but not started by us"); 762 return 0; 763 } 764 765 log_info("(e)SCO Connection failed 0x%02x", status); 766 switch (status){ 767 case ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE: 768 case ERROR_CODE_UNSPECIFIED_ERROR: 769 case ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES: 770 break; 771 default: 772 return 0; 773 } 774 775 // note: eSCO_S4 supported flag not available, but it's only relevant for highest CVSD link setting (and the current failed) 776 hfp_link_settings_t next_setting = hfp_next_link_setting_for_connection(hfp_sco_establishment_active->link_setting, hfp_sco_establishment_active, false); 777 778 // handle no valid setting found 779 if (next_setting == HFP_LINK_SETTINGS_NONE) { 780 if (hfp_sco_establishment_active->negotiated_codec == HFP_CODEC_MSBC){ 781 log_info("T2/T1 failed, fallback to CVSD - D1"); 782 hfp_sco_establishment_active->negotiated_codec = HFP_CODEC_CVSD; 783 hfp_sco_establishment_active->sco_for_msbc_failed = 1; 784 hfp_sco_establishment_active->ag_send_common_codec = true; 785 hfp_sco_establishment_active->link_setting = HFP_LINK_SETTINGS_D1; 786 } else { 787 // no other options 788 return 0; 789 } 790 } 791 792 log_info("e)SCO Connection: try new link_setting %d", next_setting); 793 hfp_sco_establishment_active->establish_audio_connection = 1; 794 hfp_sco_establishment_active->link_setting = next_setting; 795 hfp_sco_establishment_active = NULL; 796 return 1; 797 } 798 799 void hfp_handle_hci_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, hfp_role_t local_role){ 800 UNUSED(packet_type); 801 UNUSED(channel); // ok: no channel 802 UNUSED(size); 803 804 bd_addr_t event_addr; 805 hci_con_handle_t handle; 806 hfp_connection_t * hfp_connection = NULL; 807 uint8_t status; 808 809 log_debug("HFP HCI event handler type %u, event type %x, size %u", packet_type, hci_event_packet_get_type(packet), size); 810 811 switch (hci_event_packet_get_type(packet)) { 812 813 case HCI_EVENT_CONNECTION_REQUEST: 814 switch(hci_event_connection_request_get_link_type(packet)){ 815 case 0: // SCO 816 case 2: // eSCO 817 hci_event_connection_request_get_bd_addr(packet, event_addr); 818 hfp_connection = get_hfp_connection_context_for_bd_addr(event_addr, local_role); 819 if (!hfp_connection) break; 820 if (hci_event_connection_request_get_link_type(packet) == 2){ 821 hfp_connection->accept_sco = 2; 822 } else { 823 hfp_connection->accept_sco = 1; 824 } 825 #ifdef ENABLE_CC256X_ASSISTED_HFP 826 hfp_cc256x_prepare_for_sco(hfp_connection); 827 #endif 828 #ifdef ENABLE_BCM_PCM_WBS 829 hfp_bcm_prepare_for_sco(hfp_connection); 830 #endif 831 log_info("accept sco %u\n", hfp_connection->accept_sco); 832 hfp_sco_establishment_active = hfp_connection; 833 break; 834 default: 835 break; 836 } 837 break; 838 839 case HCI_EVENT_COMMAND_STATUS: 840 if (hci_event_command_status_get_command_opcode(packet) == hci_setup_synchronous_connection.opcode) { 841 if (hfp_sco_establishment_active == NULL) break; 842 status = hci_event_command_status_get_status(packet); 843 if (status == ERROR_CODE_SUCCESS) break; 844 845 hfp_connection = hfp_sco_establishment_active; 846 if (hfp_handle_failed_sco_connection(status)) break; 847 hfp_connection->establish_audio_connection = 0; 848 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 849 hfp_emit_sco_event(hfp_connection, status, 0, hfp_connection->remote_addr, hfp_connection->negotiated_codec); 850 } 851 break; 852 853 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 854 if (hfp_sco_establishment_active == NULL) break; 855 hci_event_synchronous_connection_complete_get_bd_addr(packet, event_addr); 856 hfp_connection = get_hfp_connection_context_for_bd_addr(event_addr, local_role); 857 if (!hfp_connection) { 858 log_error("HFP: connection does not exist for remote with addr %s.", bd_addr_to_str(event_addr)); 859 return; 860 } 861 862 status = hci_event_synchronous_connection_complete_get_status(packet); 863 if (status != ERROR_CODE_SUCCESS){ 864 hfp_connection->accept_sco = 0; 865 if (hfp_handle_failed_sco_connection(status)) break; 866 867 hfp_connection->establish_audio_connection = 0; 868 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 869 hfp_emit_sco_event(hfp_connection, status, 0, event_addr, hfp_connection->negotiated_codec); 870 break; 871 } 872 873 uint16_t sco_handle = hci_event_synchronous_connection_complete_get_handle(packet); 874 uint8_t link_type = hci_event_synchronous_connection_complete_get_link_type(packet); 875 uint8_t transmission_interval = hci_event_synchronous_connection_complete_get_transmission_interval(packet); // measured in slots 876 uint8_t retransmission_interval = hci_event_synchronous_connection_complete_get_retransmission_interval(packet);// measured in slots 877 uint16_t rx_packet_length = hci_event_synchronous_connection_complete_get_rx_packet_length(packet); // measured in bytes 878 uint16_t tx_packet_length = hci_event_synchronous_connection_complete_get_tx_packet_length(packet); // measured in bytes 879 880 switch (link_type){ 881 case 0x00: 882 log_info("SCO Connection established."); 883 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 884 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 885 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 886 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 887 break; 888 case 0x02: 889 log_info("eSCO Connection established. \n"); 890 break; 891 default: 892 log_error("(e)SCO reserved link_type 0x%2x", link_type); 893 break; 894 } 895 896 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 897 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)\n", sco_handle, 898 bd_addr_to_str(event_addr), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, 899 hci_event_synchronous_connection_complete_get_air_mode(packet)); 900 901 if (hfp_connection->state == HFP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 902 log_info("SCO about to disconnect: HFP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN"); 903 hfp_connection->state = HFP_W2_DISCONNECT_SCO; 904 break; 905 } 906 hfp_connection->sco_handle = sco_handle; 907 hfp_connection->establish_audio_connection = 0; 908 909 hfp_connection->state = HFP_AUDIO_CONNECTION_ESTABLISHED; 910 911 switch (hfp_connection->vra_state){ 912 case HFP_VRA_VOICE_RECOGNITION_ACTIVATED: 913 hfp_connection->ag_audio_connection_opened_before_vra = false; 914 break; 915 default: 916 hfp_connection->ag_audio_connection_opened_before_vra = true; 917 break; 918 } 919 hfp_emit_sco_event(hfp_connection, status, sco_handle, event_addr, hfp_connection->negotiated_codec); 920 break; 921 } 922 923 case HCI_EVENT_DISCONNECTION_COMPLETE: 924 handle = little_endian_read_16(packet,3); 925 hfp_connection = get_hfp_connection_context_for_sco_handle(handle, local_role); 926 927 if (!hfp_connection) break; 928 929 #ifdef ENABLE_CC256X_ASSISTED_HFP 930 hfp_connection->cc256x_send_wbs_disassociate = true; 931 #endif 932 #ifdef ENABLE_BCM_PCM_WBS 933 hfp_connection->bcm_send_disable_wbs = true; 934 #endif 935 if (hfp_connection->sco_handle == handle){ 936 hfp_connection->sco_handle = HCI_CON_HANDLE_INVALID; 937 hfp_connection->release_audio_connection = 0; 938 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 939 hfp_emit_audio_connection_released(hfp_connection, handle); 940 941 hfp_connection->ag_audio_connection_opened_before_vra = false; 942 943 if (hfp_connection->acl_handle == HCI_CON_HANDLE_INVALID){ 944 hfp_reset_voice_recognition(hfp_connection); 945 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SERVICE_LEVEL_CONNECTION_RELEASED, 0); 946 hfp_finalize_connection_context(hfp_connection); 947 } else if (hfp_connection->release_slc_connection == 1){ 948 hfp_connection->release_slc_connection = 0; 949 hfp_connection->state = HFP_W2_DISCONNECT_RFCOMM; 950 rfcomm_disconnect(hfp_connection->acl_handle); 951 } 952 } 953 954 if (hfp_connection->state == HFP_W4_SCO_DISCONNECTED_TO_SHUTDOWN){ 955 // RFCOMM already closed -> remote power off 956 #if defined(ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 957 hfp_connection->state = HFP_W4_WBS_SHUTDOWN; 958 #else 959 hfp_finalize_connection_context(hfp_connection); 960 #endif 961 break; 962 } 963 break; 964 965 default: 966 break; 967 } 968 } 969 970 971 void hfp_handle_rfcomm_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, hfp_role_t local_role){ 972 UNUSED(packet_type); 973 UNUSED(channel); // ok: no channel 974 UNUSED(size); 975 976 bd_addr_t event_addr; 977 uint16_t rfcomm_cid; 978 hfp_connection_t * hfp_connection = NULL; 979 uint8_t status; 980 981 log_debug("HFP packet_handler type %u, event type %x, size %u", packet_type, hci_event_packet_get_type(packet), size); 982 983 switch (hci_event_packet_get_type(packet)) { 984 985 case RFCOMM_EVENT_INCOMING_CONNECTION: 986 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 987 rfcomm_event_incoming_connection_get_bd_addr(packet, event_addr); 988 hfp_connection = hfp_create_connection(event_addr, local_role); 989 if (!hfp_connection){ 990 log_info("hfp: no memory to accept incoming connection - decline"); 991 rfcomm_decline_connection(rfcomm_event_incoming_connection_get_rfcomm_cid(packet)); 992 return; 993 } 994 if (hfp_connection->state != HFP_IDLE) { 995 log_error("hfp: incoming connection but not idle, reject"); 996 rfcomm_decline_connection(rfcomm_event_incoming_connection_get_rfcomm_cid(packet)); 997 return; 998 } 999 1000 hfp_connection->rfcomm_cid = rfcomm_event_incoming_connection_get_rfcomm_cid(packet); 1001 hfp_connection->state = HFP_W4_RFCOMM_CONNECTED; 1002 rfcomm_accept_connection(hfp_connection->rfcomm_cid); 1003 break; 1004 1005 case RFCOMM_EVENT_CHANNEL_OPENED: 1006 rfcomm_event_channel_opened_get_bd_addr(packet, event_addr); 1007 1008 hfp_connection = get_hfp_connection_context_for_bd_addr(event_addr, local_role); 1009 btstack_assert(hfp_connection != NULL); 1010 1011 if (hfp_connection->state != HFP_W4_RFCOMM_CONNECTED){ 1012 break; 1013 } 1014 1015 status = rfcomm_event_channel_opened_get_status(packet); 1016 if (status != ERROR_CODE_SUCCESS) { 1017 hfp_emit_slc_connection_event(hfp_connection, status, rfcomm_event_channel_opened_get_con_handle(packet), event_addr); 1018 hfp_finalize_connection_context(hfp_connection); 1019 break; 1020 } 1021 1022 hfp_connection->acl_handle = rfcomm_event_channel_opened_get_con_handle(packet); 1023 hfp_connection->rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 1024 hfp_connection->rfcomm_mtu = rfcomm_event_channel_opened_get_max_frame_size(packet); 1025 bd_addr_copy(hfp_connection->remote_addr, event_addr); 1026 hfp_connection->state = HFP_EXCHANGE_SUPPORTED_FEATURES; 1027 1028 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1029 break; 1030 1031 case RFCOMM_EVENT_CHANNEL_CLOSED: 1032 rfcomm_cid = little_endian_read_16(packet,2); 1033 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 1034 if (!hfp_connection) break; 1035 switch (hfp_connection->state){ 1036 case HFP_W4_RFCOMM_DISCONNECTED_AND_RESTART: 1037 hfp_connection->acl_handle = HCI_CON_HANDLE_INVALID; 1038 hfp_connection->state = HFP_IDLE; 1039 hfp_establish_service_level_connection(hfp_connection->remote_addr, hfp_connection->service_uuid, local_role); 1040 break; 1041 1042 case HFP_AUDIO_CONNECTION_ESTABLISHED: 1043 // service connection was released, this implicitly releases audio connection as well 1044 hfp_connection->release_audio_connection = 0; 1045 hfp_connection->acl_handle = HCI_CON_HANDLE_INVALID; 1046 hfp_connection->state = HFP_W4_SCO_DISCONNECTED_TO_SHUTDOWN; 1047 gap_disconnect(hfp_connection->sco_handle); 1048 break; 1049 1050 default: 1051 // regular case 1052 hfp_reset_voice_recognition(hfp_connection); 1053 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SERVICE_LEVEL_CONNECTION_RELEASED, 0); 1054 hfp_finalize_connection_context(hfp_connection); 1055 break; 1056 } 1057 break; 1058 1059 default: 1060 break; 1061 } 1062 } 1063 // translates command string into hfp_command_t CMD 1064 1065 typedef struct { 1066 const char * command; 1067 hfp_command_t command_id; 1068 } hfp_command_entry_t; 1069 1070 static hfp_command_entry_t hfp_ag_commmand_table[] = { 1071 { "AT+BAC=", HFP_CMD_AVAILABLE_CODECS }, 1072 { "AT+BCC", HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP }, 1073 { "AT+BCS=", HFP_CMD_HF_CONFIRMED_CODEC }, 1074 { "AT+BIA=", HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE, }, // +BIA:<enabled>,,<enabled>,,,<enabled> 1075 { "AT+BIEV=", HFP_CMD_HF_INDICATOR_STATUS }, 1076 { "AT+BIND=", HFP_CMD_LIST_GENERIC_STATUS_INDICATORS }, 1077 { "AT+BIND=?", HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS }, 1078 { "AT+BIND?", HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE }, 1079 { "AT+BINP=", HFP_CMD_HF_REQUEST_PHONE_NUMBER }, 1080 { "AT+BLDN", HFP_CMD_REDIAL_LAST_NUMBER }, 1081 { "AT+BRSF=", HFP_CMD_SUPPORTED_FEATURES }, 1082 { "AT+BTRH=", HFP_CMD_RESPONSE_AND_HOLD_COMMAND }, 1083 { "AT+BTRH?", HFP_CMD_RESPONSE_AND_HOLD_QUERY }, 1084 { "AT+BVRA=", HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION }, 1085 { "AT+CCWA=", HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION}, 1086 { "AT+CHLD=", HFP_CMD_CALL_HOLD }, 1087 { "AT+CHLD=?", HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES }, 1088 { "AT+CHUP", HFP_CMD_HANG_UP_CALL }, 1089 { "AT+CIND=?", HFP_CMD_RETRIEVE_AG_INDICATORS }, 1090 { "AT+CIND?", HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS }, 1091 { "AT+CLCC", HFP_CMD_LIST_CURRENT_CALLS }, 1092 { "AT+CLIP=", HFP_CMD_ENABLE_CLIP}, 1093 { "AT+CMEE=", HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR}, 1094 { "AT+CMER=", HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE }, 1095 { "AT+CNUM", HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION }, 1096 { "AT+COPS=", HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT }, 1097 { "AT+COPS?", HFP_CMD_QUERY_OPERATOR_SELECTION_NAME }, 1098 { "AT+NREC=", HFP_CMD_TURN_OFF_EC_AND_NR, }, 1099 { "AT+VGM=", HFP_CMD_SET_MICROPHONE_GAIN }, 1100 { "AT+VGS=", HFP_CMD_SET_SPEAKER_GAIN }, 1101 { "AT+VTS=", HFP_CMD_TRANSMIT_DTMF_CODES }, 1102 { "ATA", HFP_CMD_CALL_ANSWERED }, 1103 }; 1104 1105 static hfp_command_entry_t hfp_hf_commmand_table[] = { 1106 { "+BCS:", HFP_CMD_AG_SUGGESTED_CODEC }, 1107 { "+BIND:", HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS }, 1108 { "+BINP", HFP_CMD_AG_SENT_PHONE_NUMBER }, 1109 { "+BRSF:", HFP_CMD_SUPPORTED_FEATURES }, 1110 { "+BSIR:", HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING }, 1111 { "+BTRH:", HFP_CMD_RESPONSE_AND_HOLD_STATUS }, 1112 { "+BVRA:", HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION }, 1113 { "+CCWA:", HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE, }, 1114 { "+CHLD:", HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES }, 1115 { "+CIEV:", HFP_CMD_TRANSFER_AG_INDICATOR_STATUS}, 1116 { "+CIND:", HFP_CMD_RETRIEVE_AG_INDICATORS_GENERIC }, 1117 { "+CLCC:", HFP_CMD_LIST_CURRENT_CALLS }, 1118 { "+CLIP:", HFP_CMD_AG_SENT_CLIP_INFORMATION }, 1119 { "+CME ERROR:", HFP_CMD_EXTENDED_AUDIO_GATEWAY_ERROR }, 1120 { "+CNUM:", HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION}, 1121 { "+COPS:", HFP_CMD_QUERY_OPERATOR_SELECTION_NAME }, 1122 { "+VGM:", HFP_CMD_SET_MICROPHONE_GAIN }, 1123 { "+VGM=", HFP_CMD_SET_MICROPHONE_GAIN }, 1124 { "+VGS:", HFP_CMD_SET_SPEAKER_GAIN}, 1125 { "+VGS=", HFP_CMD_SET_SPEAKER_GAIN}, 1126 { "ERROR", HFP_CMD_ERROR}, 1127 { "NOP", HFP_CMD_NONE}, // dummy command used by unit tests 1128 { "OK", HFP_CMD_OK }, 1129 { "RING", HFP_CMD_RING }, 1130 }; 1131 1132 static hfp_command_t parse_command(const char * line_buffer, int isHandsFree){ 1133 1134 // table lookup based on role 1135 uint16_t num_entries; 1136 hfp_command_entry_t * table; 1137 if (isHandsFree == 0){ 1138 table = hfp_ag_commmand_table; 1139 num_entries = sizeof(hfp_ag_commmand_table) / sizeof(hfp_command_entry_t); 1140 } else { 1141 table = hfp_hf_commmand_table; 1142 num_entries = sizeof(hfp_hf_commmand_table) / sizeof(hfp_command_entry_t); 1143 } 1144 // binary search 1145 uint16_t left = 0; 1146 uint16_t right = num_entries - 1; 1147 while (left <= right){ 1148 uint16_t middle = left + (right - left) / 2; 1149 hfp_command_entry_t *entry = &table[middle]; 1150 int match = strcmp(line_buffer, entry->command); 1151 if (match < 0){ 1152 // search term is lower than middle element 1153 if (right == 0) break; 1154 right = middle - 1; 1155 } else if (match == 0){ 1156 return entry->command_id; 1157 } else { 1158 // search term is higher than middle element 1159 left = middle + 1; 1160 } 1161 } 1162 1163 // note: if parser in CMD_HEADER state would treats digits and maybe '+' as separator, match on "ATD" would work. 1164 // note: phone number is currently expected in line_buffer[3..] 1165 // prefix match on 'ATD', AG only 1166 if ((isHandsFree == 0) && (strncmp(line_buffer, HFP_CALL_PHONE_NUMBER, strlen(HFP_CALL_PHONE_NUMBER)) == 0)){ 1167 return HFP_CMD_CALL_PHONE_NUMBER; 1168 } 1169 1170 // Valid looking, but unknown commands/responses 1171 if ((isHandsFree == 0) && (strncmp(line_buffer, "AT+", 3) == 0)){ 1172 return HFP_CMD_UNKNOWN; 1173 } 1174 1175 if ((isHandsFree != 0) && (strncmp(line_buffer, "+", 1) == 0)){ 1176 return HFP_CMD_UNKNOWN; 1177 } 1178 1179 return HFP_CMD_NONE; 1180 } 1181 1182 static void hfp_parser_store_byte(hfp_connection_t * hfp_connection, uint8_t byte){ 1183 if ((hfp_connection->line_size + 1) >= HFP_MAX_VR_TEXT_SIZE) return; 1184 hfp_connection->line_buffer[hfp_connection->line_size++] = byte; 1185 hfp_connection->line_buffer[hfp_connection->line_size] = 0; 1186 } 1187 static int hfp_parser_is_buffer_empty(hfp_connection_t * hfp_connection){ 1188 return hfp_connection->line_size == 0; 1189 } 1190 1191 static int hfp_parser_is_end_of_line(uint8_t byte){ 1192 return (byte == '\n') || (byte == '\r'); 1193 } 1194 1195 static void hfp_parser_reset_line_buffer(hfp_connection_t *hfp_connection) { 1196 hfp_connection->line_size = 0; 1197 // hfp_connection->line_buffer[0] = 0; 1198 } 1199 1200 static void hfp_parser_store_if_token(hfp_connection_t * hfp_connection, uint8_t byte){ 1201 switch (byte){ 1202 case ',': 1203 case '-': 1204 case ';': 1205 case '(': 1206 case ')': 1207 case '\n': 1208 case '\r': 1209 break; 1210 default: 1211 hfp_parser_store_byte(hfp_connection, byte); 1212 break; 1213 } 1214 } 1215 1216 static bool hfp_parser_is_separator( uint8_t byte){ 1217 switch (byte){ 1218 case ',': 1219 case '-': 1220 case ';': 1221 case '\n': 1222 case '\r': 1223 return true; 1224 default: 1225 return false; 1226 } 1227 } 1228 1229 static bool hfp_parse_byte(hfp_connection_t * hfp_connection, uint8_t byte, int isHandsFree){ 1230 1231 // handle doubles quotes 1232 if (byte == '"'){ 1233 hfp_connection->parser_quoted = !hfp_connection->parser_quoted; 1234 return true; 1235 } 1236 if (hfp_connection->parser_quoted) { 1237 hfp_parser_store_byte(hfp_connection, byte); 1238 return true; 1239 } 1240 1241 // ignore spaces outside command or double quotes (required e.g. for '+CME ERROR:..") command 1242 if ((byte == ' ') && (hfp_connection->parser_state != HFP_PARSER_CMD_HEADER)) return true; 1243 1244 bool processed = true; 1245 1246 switch (hfp_connection->parser_state) { 1247 case HFP_PARSER_CMD_HEADER: 1248 switch (byte) { 1249 case '\n': 1250 case '\r': 1251 case ';': 1252 // ignore separator 1253 break; 1254 case ':': 1255 case '?': 1256 // store separator 1257 hfp_parser_store_byte(hfp_connection, byte); 1258 break; 1259 case '=': 1260 // equal sign: remember and wait for next char to decided between '=?' and '=\?' 1261 hfp_connection->found_equal_sign = true; 1262 hfp_parser_store_byte(hfp_connection, byte); 1263 return true; 1264 default: 1265 // store if not lookahead 1266 if (!hfp_connection->found_equal_sign) { 1267 hfp_parser_store_byte(hfp_connection, byte); 1268 return true; 1269 } 1270 // mark as lookahead 1271 processed = false; 1272 break; 1273 } 1274 1275 // ignore empty tokens 1276 if (hfp_parser_is_buffer_empty(hfp_connection)) return true; 1277 1278 // parse 1279 hfp_connection->command = parse_command((char *)hfp_connection->line_buffer, isHandsFree); 1280 1281 // pick +CIND version based on connection state: descriptions during SLC vs. states later 1282 if (hfp_connection->command == HFP_CMD_RETRIEVE_AG_INDICATORS_GENERIC){ 1283 switch(hfp_connection->state){ 1284 case HFP_W4_RETRIEVE_INDICATORS_STATUS: 1285 hfp_connection->command = HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS; 1286 break; 1287 case HFP_W4_RETRIEVE_INDICATORS: 1288 hfp_connection->command = HFP_CMD_RETRIEVE_AG_INDICATORS; 1289 break; 1290 default: 1291 hfp_connection->command = HFP_CMD_UNKNOWN; 1292 break; 1293 } 1294 } 1295 1296 log_info("command string '%s', handsfree %u -> cmd id %u", (char *)hfp_connection->line_buffer, isHandsFree, hfp_connection->command); 1297 1298 // next state 1299 hfp_connection->found_equal_sign = false; 1300 hfp_parser_reset_line_buffer(hfp_connection); 1301 hfp_connection->parser_state = HFP_PARSER_CMD_SEQUENCE; 1302 1303 return processed; 1304 1305 case HFP_PARSER_CMD_SEQUENCE: 1306 // handle empty fields 1307 if ((byte == ',' ) && (hfp_connection->line_size == 0)){ 1308 hfp_connection->line_buffer[0] = 0; 1309 hfp_connection->ignore_value = 1; 1310 parse_sequence(hfp_connection); 1311 return true; 1312 } 1313 1314 hfp_parser_store_if_token(hfp_connection, byte); 1315 if (!hfp_parser_is_separator(byte)) return true; 1316 1317 // ignore empty tokens 1318 switch (hfp_connection->command){ 1319 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 1320 // don't ignore empty string 1321 break; 1322 default: 1323 if (hfp_parser_is_buffer_empty(hfp_connection) && (hfp_connection->ignore_value == 0)) { 1324 return true; 1325 } 1326 break; 1327 } 1328 1329 parse_sequence(hfp_connection); 1330 1331 hfp_parser_reset_line_buffer(hfp_connection); 1332 1333 switch (hfp_connection->command){ 1334 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1335 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1336 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1337 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1338 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1339 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1340 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1341 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1342 case HFP_CMD_HF_INDICATOR_STATUS: 1343 hfp_connection->parser_state = HFP_PARSER_SECOND_ITEM; 1344 break; 1345 default: 1346 break; 1347 } 1348 return true; 1349 1350 case HFP_PARSER_SECOND_ITEM: 1351 1352 hfp_parser_store_if_token(hfp_connection, byte); 1353 if (!hfp_parser_is_separator(byte)) return true; 1354 1355 switch (hfp_connection->command){ 1356 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1357 log_info("format %s, ", hfp_connection->line_buffer); 1358 hfp_connection->network_operator.format = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1359 break; 1360 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1361 log_info("format %s \n", hfp_connection->line_buffer); 1362 hfp_connection->network_operator.format = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1363 break; 1364 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 1365 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 1366 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1367 hfp_connection->generic_status_indicators[hfp_connection->parser_item_index].state = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1368 break; 1369 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1370 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1371 log_info("%d \n", hfp_connection->ag_indicators[hfp_connection->parser_item_index].status); 1372 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status_changed = 1; 1373 break; 1374 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1375 hfp_connection->ag_indicators[hfp_connection->parser_item_index].min_range = btstack_atoi((char *)hfp_connection->line_buffer); 1376 log_info("%s, ", hfp_connection->line_buffer); 1377 break; 1378 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1379 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1380 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1381 hfp_connection->bnip_type = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1382 break; 1383 case HFP_CMD_HF_INDICATOR_STATUS: 1384 hfp_connection->parser_indicator_value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1385 break; 1386 default: 1387 break; 1388 } 1389 1390 hfp_parser_reset_line_buffer(hfp_connection); 1391 1392 hfp_connection->parser_state = HFP_PARSER_THIRD_ITEM; 1393 1394 return true; 1395 1396 case HFP_PARSER_THIRD_ITEM: 1397 1398 hfp_parser_store_if_token(hfp_connection, byte); 1399 if (!hfp_parser_is_separator(byte)) return true; 1400 1401 switch (hfp_connection->command){ 1402 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1403 strncpy(hfp_connection->network_operator.name, (char *)hfp_connection->line_buffer, HFP_MAX_NETWORK_OPERATOR_NAME_SIZE); 1404 hfp_connection->network_operator.name[HFP_MAX_NETWORK_OPERATOR_NAME_SIZE - 1] = 0; 1405 log_info("name %s\n", hfp_connection->line_buffer); 1406 break; 1407 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1408 hfp_connection->ag_indicators[hfp_connection->parser_item_index].max_range = btstack_atoi((char *)hfp_connection->line_buffer); 1409 hfp_next_indicators_index(hfp_connection); 1410 hfp_connection->ag_indicators_nr = hfp_connection->parser_item_index; 1411 log_info("%s)\n", hfp_connection->line_buffer); 1412 break; 1413 default: 1414 break; 1415 } 1416 1417 hfp_parser_reset_line_buffer(hfp_connection); 1418 1419 if (hfp_connection->command == HFP_CMD_RETRIEVE_AG_INDICATORS){ 1420 hfp_connection->parser_state = HFP_PARSER_CMD_SEQUENCE; 1421 } else { 1422 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 1423 } 1424 return true; 1425 1426 default: 1427 btstack_assert(false); 1428 return true; 1429 } 1430 } 1431 1432 void hfp_parse(hfp_connection_t * hfp_connection, uint8_t byte, int isHandsFree){ 1433 bool processed = false; 1434 while (!processed){ 1435 processed = hfp_parse_byte(hfp_connection, byte, isHandsFree); 1436 } 1437 // reset parser state on end-of-line 1438 if (hfp_parser_is_end_of_line(byte)){ 1439 hfp_connection->parser_item_index = 0; 1440 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 1441 } 1442 } 1443 1444 static void parse_sequence(hfp_connection_t * hfp_connection){ 1445 int value; 1446 switch (hfp_connection->command){ 1447 case HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS: 1448 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1449 int i; 1450 switch (hfp_connection->parser_item_index){ 1451 case 0: 1452 for (i=0;i<hfp_connection->generic_status_indicators_nr;i++){ 1453 if (hfp_connection->generic_status_indicators[i].uuid == value){ 1454 hfp_connection->parser_indicator_index = i; 1455 break; 1456 } 1457 } 1458 break; 1459 case 1: 1460 if (hfp_connection->parser_indicator_index <0) break; 1461 hfp_connection->generic_status_indicators[hfp_connection->parser_indicator_index].state = value; 1462 log_info("HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS set indicator at index %u, to %u\n", 1463 hfp_connection->parser_item_index, value); 1464 break; 1465 default: 1466 break; 1467 } 1468 hfp_next_indicators_index(hfp_connection); 1469 break; 1470 1471 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 1472 switch(hfp_connection->parser_item_index){ 1473 case 0: 1474 // <alpha>: This optional field is not supported, and shall be left blank. 1475 break; 1476 case 1: 1477 // <number>: Quoted string containing the phone number in the format specified by <type>. 1478 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1479 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1480 break; 1481 case 2: 1482 /* 1483 <type> field specifies the format of the phone number provided, and can be one of the following values: 1484 - values 128-143: The phone number format may be a national or international format, and may contain prefix and/or escape digits. No changes on the number presentation are required. 1485 - values 144-159: The phone number format is an international number, including the country code prefix. If the plus sign ("+") is not included as part of the number and shall be added by the AG as needed. 1486 - values 160-175: National number. No prefix nor escape digits included. 1487 */ 1488 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1489 hfp_connection->bnip_type = value; 1490 break; 1491 case 3: 1492 // <speed>: This optional field is not supported, and shall be left blank. 1493 break; 1494 case 4: 1495 // <service>: Indicates which service this phone number relates to. Shall be either 4 (voice) or 5 (fax). 1496 default: 1497 break; 1498 } 1499 // index > 2 are ignored in switch above 1500 hfp_connection->parser_item_index++; 1501 break; 1502 case HFP_CMD_LIST_CURRENT_CALLS: 1503 switch(hfp_connection->parser_item_index){ 1504 case 0: 1505 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1506 hfp_connection->clcc_idx = value; 1507 break; 1508 case 1: 1509 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1510 hfp_connection->clcc_dir = value; 1511 break; 1512 case 2: 1513 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1514 hfp_connection->clcc_status = value; 1515 break; 1516 case 3: 1517 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1518 hfp_connection->clcc_mode = value; 1519 break; 1520 case 4: 1521 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1522 hfp_connection->clcc_mpty = value; 1523 break; 1524 case 5: 1525 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1526 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1527 break; 1528 case 6: 1529 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1530 hfp_connection->bnip_type = value; 1531 break; 1532 default: 1533 break; 1534 } 1535 // index > 6 are ignored in switch above 1536 hfp_connection->parser_item_index++; 1537 break; 1538 case HFP_CMD_SET_MICROPHONE_GAIN: 1539 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1540 hfp_connection->microphone_gain = value; 1541 log_info("hfp parse HFP_CMD_SET_MICROPHONE_GAIN %d\n", value); 1542 break; 1543 case HFP_CMD_SET_SPEAKER_GAIN: 1544 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1545 hfp_connection->speaker_gain = value; 1546 log_info("hfp parse HFP_CMD_SET_SPEAKER_GAIN %d\n", value); 1547 break; 1548 case HFP_CMD_TURN_OFF_EC_AND_NR: 1549 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1550 hfp_connection->ag_echo_and_noise_reduction = value; 1551 log_info("hfp parse HFP_CMD_TURN_OFF_EC_AND_NR %d\n", value); 1552 break; 1553 case HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING: 1554 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1555 hfp_connection->remote_supported_features = store_bit(hfp_connection->remote_supported_features, HFP_AGSF_IN_BAND_RING_TONE, value); 1556 log_info("hfp parse HFP_CHANGE_IN_BAND_RING_TONE_SETTING %d\n", value); 1557 break; 1558 case HFP_CMD_HF_CONFIRMED_CODEC: 1559 hfp_connection->codec_confirmed = btstack_atoi((char*)hfp_connection->line_buffer); 1560 log_info("hfp parse HFP_CMD_HF_CONFIRMED_CODEC %d\n", hfp_connection->codec_confirmed); 1561 break; 1562 case HFP_CMD_AG_SUGGESTED_CODEC: 1563 hfp_connection->suggested_codec = btstack_atoi((char*)hfp_connection->line_buffer); 1564 log_info("hfp parse HFP_CMD_AG_SUGGESTED_CODEC %d\n", hfp_connection->suggested_codec); 1565 break; 1566 case HFP_CMD_SUPPORTED_FEATURES: 1567 hfp_connection->remote_supported_features = btstack_atoi((char*)hfp_connection->line_buffer); 1568 log_info("Parsed supported feature %d\n", (int) hfp_connection->remote_supported_features); 1569 break; 1570 case HFP_CMD_AVAILABLE_CODECS: 1571 log_info("Parsed codec %s\n", hfp_connection->line_buffer); 1572 hfp_connection->remote_codecs[hfp_connection->parser_item_index] = (uint16_t)btstack_atoi((char*)hfp_connection->line_buffer); 1573 hfp_next_codec_index(hfp_connection); 1574 hfp_connection->remote_codecs_nr = hfp_connection->parser_item_index; 1575 break; 1576 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1577 strncpy((char *)hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, (char *)hfp_connection->line_buffer, HFP_MAX_INDICATOR_DESC_SIZE); 1578 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name[HFP_MAX_INDICATOR_DESC_SIZE-1] = 0; 1579 hfp_connection->ag_indicators[hfp_connection->parser_item_index].index = hfp_connection->parser_item_index+1; 1580 log_info("Indicator %d: %s (", hfp_connection->ag_indicators_nr+1, hfp_connection->line_buffer); 1581 break; 1582 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 1583 log_info("Parsed Indicator %d with status: %s\n", hfp_connection->parser_item_index+1, hfp_connection->line_buffer); 1584 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status = btstack_atoi((char *) hfp_connection->line_buffer); 1585 hfp_next_indicators_index(hfp_connection); 1586 break; 1587 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1588 hfp_next_indicators_index(hfp_connection); 1589 if (hfp_connection->parser_item_index != 4) break; 1590 log_info("Parsed Enable indicators: %s\n", hfp_connection->line_buffer); 1591 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1592 hfp_connection->enable_status_update_for_ag_indicators = (uint8_t) value; 1593 break; 1594 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 1595 log_info("Parsed Support call hold: %s\n", hfp_connection->line_buffer); 1596 if (hfp_connection->line_size > 2 ) break; 1597 memcpy((char *)hfp_connection->remote_call_services[hfp_connection->remote_call_services_index].name, (char *)hfp_connection->line_buffer, HFP_CALL_SERVICE_SIZE-1); 1598 hfp_connection->remote_call_services[hfp_connection->remote_call_services_index].name[HFP_CALL_SERVICE_SIZE - 1] = 0; 1599 hfp_next_remote_call_services_index(hfp_connection); 1600 break; 1601 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 1602 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 1603 log_info("Parsed Generic status indicator: %s\n", hfp_connection->line_buffer); 1604 hfp_connection->generic_status_indicators[hfp_connection->parser_item_index].uuid = (uint16_t)btstack_atoi((char*)hfp_connection->line_buffer); 1605 hfp_next_indicators_index(hfp_connection); 1606 hfp_connection->generic_status_indicators_nr = hfp_connection->parser_item_index; 1607 break; 1608 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1609 // HF parses inital AG gen. ind. state 1610 log_info("Parsed List generic status indicator %s state: ", hfp_connection->line_buffer); 1611 hfp_connection->parser_item_index = hfp_parse_indicator_index(hfp_connection); 1612 break; 1613 case HFP_CMD_HF_INDICATOR_STATUS: 1614 hfp_connection->parser_indicator_index = hfp_parse_indicator_index(hfp_connection); 1615 log_info("Parsed HF indicator index %u", hfp_connection->parser_indicator_index); 1616 break; 1617 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1618 // AG parses new gen. ind. state 1619 if (hfp_connection->ignore_value){ 1620 hfp_connection->ignore_value = 0; 1621 log_info("Parsed Enable AG indicator pos %u('%s') - unchanged (stays %u)\n", hfp_connection->parser_item_index, 1622 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, hfp_connection->ag_indicators[hfp_connection->parser_item_index].enabled); 1623 } 1624 else if (hfp_connection->ag_indicators[hfp_connection->parser_item_index].mandatory){ 1625 log_info("Parsed Enable AG indicator pos %u('%s') - ignore (mandatory)\n", 1626 hfp_connection->parser_item_index, hfp_connection->ag_indicators[hfp_connection->parser_item_index].name); 1627 } else { 1628 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1629 hfp_connection->ag_indicators[hfp_connection->parser_item_index].enabled = value; 1630 log_info("Parsed Enable AG indicator pos %u('%s'): %u\n", hfp_connection->parser_item_index, 1631 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, value); 1632 } 1633 hfp_next_indicators_index(hfp_connection); 1634 break; 1635 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1636 // indicators are indexed starting with 1 1637 hfp_connection->parser_item_index = hfp_parse_indicator_index(hfp_connection); 1638 log_info("Parsed status of the AG indicator %d, status ", hfp_connection->parser_item_index); 1639 break; 1640 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1641 hfp_connection->network_operator.mode = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1642 log_info("Parsed network operator mode: %d, ", hfp_connection->network_operator.mode); 1643 break; 1644 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1645 if (hfp_connection->line_buffer[0] == '3'){ 1646 log_info("Parsed Set network operator format : %s, ", hfp_connection->line_buffer); 1647 break; 1648 } 1649 // TODO emit ERROR, wrong format 1650 log_info("ERROR Set network operator format: index %s not supported\n", hfp_connection->line_buffer); 1651 break; 1652 case HFP_CMD_ERROR: 1653 break; 1654 case HFP_CMD_EXTENDED_AUDIO_GATEWAY_ERROR: 1655 hfp_connection->extended_audio_gateway_error = 1; 1656 hfp_connection->extended_audio_gateway_error_value = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1657 break; 1658 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1659 hfp_connection->enable_extended_audio_gateway_error_report = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1660 hfp_connection->ok_pending = 1; 1661 hfp_connection->extended_audio_gateway_error = 0; 1662 break; 1663 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1664 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1665 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1666 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1667 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1668 break; 1669 case HFP_CMD_CALL_HOLD: 1670 hfp_connection->ag_call_hold_action = hfp_connection->line_buffer[0] - '0'; 1671 if (hfp_connection->line_buffer[1] != '\0'){ 1672 hfp_connection->call_index = btstack_atoi((char *)&hfp_connection->line_buffer[1]); 1673 } 1674 break; 1675 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 1676 hfp_connection->ag_response_and_hold_action = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1677 break; 1678 case HFP_CMD_TRANSMIT_DTMF_CODES: 1679 hfp_connection->ag_dtmf_code = hfp_connection->line_buffer[0]; 1680 break; 1681 case HFP_CMD_ENABLE_CLIP: 1682 hfp_connection->clip_enabled = hfp_connection->line_buffer[0] != '0'; 1683 break; 1684 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 1685 hfp_connection->call_waiting_notification_enabled = hfp_connection->line_buffer[0] != '0'; 1686 break; 1687 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 1688 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1689 hfp_connection->ag_activate_voice_recognition_value = value; 1690 break; 1691 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 1692 switch(hfp_connection->parser_item_index){ 1693 case 0: 1694 hfp_connection->ag_vra_status = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1695 break; 1696 case 1: 1697 hfp_connection->ag_vra_state = (hfp_voice_recognition_state_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1698 break; 1699 case 2: 1700 hfp_connection->ag_msg.text_id = 0; 1701 for (i = 0 ; i < 4; i++){ 1702 hfp_connection->ag_msg.text_id = (hfp_connection->ag_msg.text_id << 4) | nibble_for_char(hfp_connection->line_buffer[i]); 1703 } 1704 break; 1705 case 3: 1706 hfp_connection->ag_msg.text_type = (hfp_text_type_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1707 break; 1708 case 4: 1709 hfp_connection->ag_msg.text_operation = (hfp_text_operation_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1710 break; 1711 case 5: 1712 hfp_connection->line_buffer[hfp_connection->line_size] = 0; 1713 hfp_connection->ag_vra_msg_length = hfp_connection->line_size + 1; 1714 break; 1715 default: 1716 break; 1717 } 1718 hfp_connection->parser_item_index++; 1719 break; 1720 default: 1721 break; 1722 } 1723 } 1724 1725 static void hfp_handle_start_sdp_client_query(void * context){ 1726 UNUSED(context); 1727 1728 btstack_linked_list_iterator_t it; 1729 btstack_linked_list_iterator_init(&it, &hfp_connections); 1730 while (btstack_linked_list_iterator_has_next(&it)){ 1731 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1732 1733 if (connection->state != HFP_W2_SEND_SDP_QUERY) continue; 1734 1735 connection->state = HFP_W4_SDP_QUERY_COMPLETE; 1736 hfp_sdp_query_context.local_role = connection->local_role; 1737 (void)memcpy(hfp_sdp_query_context.remote_address, connection->remote_addr, 6); 1738 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, connection->remote_addr, connection->service_uuid); 1739 return; 1740 } 1741 } 1742 1743 uint8_t hfp_establish_service_level_connection(bd_addr_t bd_addr, uint16_t service_uuid, hfp_role_t local_role){ 1744 hfp_connection_t * connection = get_hfp_connection_context_for_bd_addr(bd_addr, local_role); 1745 if (connection){ 1746 return ERROR_CODE_COMMAND_DISALLOWED; 1747 } 1748 1749 connection = hfp_create_connection(bd_addr, local_role); 1750 if (!connection){ 1751 return BTSTACK_MEMORY_ALLOC_FAILED; 1752 } 1753 1754 connection->state = HFP_W2_SEND_SDP_QUERY; 1755 1756 bd_addr_copy(connection->remote_addr, bd_addr); 1757 connection->service_uuid = service_uuid; 1758 1759 hfp_sdp_query_request.callback = &hfp_handle_start_sdp_client_query; 1760 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1761 (void) sdp_client_register_query_callback(&hfp_sdp_query_request); 1762 return ERROR_CODE_SUCCESS; 1763 } 1764 1765 void hfp_trigger_release_service_level_connection(hfp_connection_t * hfp_connection){ 1766 // called internally, NULL check already performed 1767 btstack_assert(hfp_connection != NULL); 1768 1769 hfp_trigger_release_audio_connection(hfp_connection); 1770 if (hfp_connection->state < HFP_W4_RFCOMM_CONNECTED){ 1771 hfp_connection->state = HFP_IDLE; 1772 return; 1773 } 1774 1775 if (hfp_connection->state == HFP_W4_RFCOMM_CONNECTED){ 1776 hfp_connection->state = HFP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 1777 return; 1778 } 1779 hfp_connection->release_slc_connection = 1; 1780 if (hfp_connection->state < HFP_W4_SCO_CONNECTED){ 1781 hfp_connection->state = HFP_W2_DISCONNECT_RFCOMM; 1782 return; 1783 } 1784 1785 if (hfp_connection->state < HFP_W4_SCO_DISCONNECTED){ 1786 hfp_connection->state = HFP_W2_DISCONNECT_SCO; 1787 hfp_connection->release_audio_connection = 1; 1788 return; 1789 } 1790 } 1791 1792 uint8_t hfp_trigger_release_audio_connection(hfp_connection_t * hfp_connection){ 1793 // called internally, NULL check already performed 1794 btstack_assert(hfp_connection != NULL); 1795 if (hfp_connection->state <= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 1796 return ERROR_CODE_COMMAND_DISALLOWED; 1797 } 1798 switch (hfp_connection->state) { 1799 case HFP_W2_CONNECT_SCO: 1800 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 1801 break; 1802 case HFP_W4_SCO_CONNECTED: 1803 case HFP_AUDIO_CONNECTION_ESTABLISHED: 1804 hfp_connection->release_audio_connection = 1; 1805 break; 1806 default: 1807 return ERROR_CODE_COMMAND_DISALLOWED; 1808 } 1809 return ERROR_CODE_SUCCESS; 1810 } 1811 1812 static const struct link_settings { 1813 const uint16_t max_latency; 1814 const uint8_t retransmission_effort; 1815 const uint16_t packet_types; 1816 const bool eSCO; 1817 const uint8_t codec; 1818 } hfp_link_settings [] = { 1819 { 0xffff, 0xff, SCO_PACKET_TYPES_HV1, false, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_D0 1820 { 0xffff, 0xff, SCO_PACKET_TYPES_HV3, false, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_D1 1821 { 0x0007, 0x01, SCO_PACKET_TYPES_EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S1 1822 { 0x0007, 0x01, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S2 1823 { 0x000a, 0x01, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S3 1824 { 0x000c, 0x02, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S4 1825 { 0x0008, 0x02, SCO_PACKET_TYPES_EV3, true, HFP_CODEC_MSBC }, // HFP_LINK_SETTINGS_T1 1826 { 0x000d, 0x02, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_MSBC } // HFP_LINK_SETTINGS_T2 1827 }; 1828 1829 void hfp_setup_synchronous_connection(hfp_connection_t * hfp_connection){ 1830 // all packet types, fixed bandwidth 1831 int setting = hfp_connection->link_setting; 1832 log_info("hfp_setup_synchronous_connection using setting nr %u", setting); 1833 hfp_sco_establishment_active = hfp_connection; 1834 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 1835 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1836 #ifdef ENABLE_BCM_PCM_WBS 1837 sco_voice_setting = 0x0063; // Transparent data, 16-bit for BCM controllers 1838 #else 1839 sco_voice_setting = 0x0043; // Transparent data, 8-bit otherwise 1840 #endif 1841 } 1842 // get packet types - bits 6-9 are 'don't allow' 1843 uint16_t packet_types = hfp_link_settings[setting].packet_types ^ 0x03c0; 1844 hci_send_cmd(&hci_setup_synchronous_connection, hfp_connection->acl_handle, 8000, 8000, hfp_link_settings[setting].max_latency, 1845 sco_voice_setting, hfp_link_settings[setting].retransmission_effort, packet_types); 1846 } 1847 1848 void hfp_accept_synchronous_connection(hfp_connection_t * hfp_connection, bool incoming_eSCO){ 1849 1850 // remote supported feature eSCO is set if link type is eSCO 1851 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 1852 uint16_t max_latency; 1853 uint8_t retransmission_effort; 1854 uint16_t packet_types; 1855 1856 if (incoming_eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(hfp_connection->acl_handle)){ 1857 max_latency = 0x000c; 1858 retransmission_effort = 0x02; 1859 // eSCO: EV3 and 2-EV3 1860 packet_types = 0x0048; 1861 } else { 1862 max_latency = 0xffff; 1863 retransmission_effort = 0xff; 1864 // sco: HV1 and HV3 1865 packet_types = 0x005; 1866 } 1867 1868 // mSBC only allows for transparent data 1869 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 1870 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1871 #ifdef ENABLE_BCM_PCM_WBS 1872 sco_voice_setting = 0x0063; // Transparent data, 16-bit for BCM controllers 1873 #else 1874 sco_voice_setting = 0x0043; // Transparent data, 8-bit otherwise 1875 #endif 1876 } 1877 1878 // filter packet types 1879 packet_types &= hfp_get_sco_packet_types(); 1880 1881 // bits 6-9 are 'don't allow' 1882 packet_types ^= 0x3c0; 1883 1884 log_info("HFP: sending hci_accept_connection_request, packet types 0x%04x, sco_voice_setting 0x%02x", packet_types, sco_voice_setting); 1885 hci_send_cmd(&hci_accept_synchronous_connection, hfp_connection->remote_addr, 8000, 8000, max_latency, 1886 sco_voice_setting, retransmission_effort, packet_types); 1887 } 1888 1889 #ifdef ENABLE_CC256X_ASSISTED_HFP 1890 void hfp_cc256x_prepare_for_sco(hfp_connection_t * hfp_connection){ 1891 hfp_connection->cc256x_send_write_codec_config = true; 1892 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1893 hfp_connection->cc256x_send_wbs_associate = true; 1894 } 1895 } 1896 1897 void hfp_cc256x_write_codec_config(hfp_connection_t * hfp_connection){ 1898 uint32_t sample_rate_hz; 1899 uint16_t clock_rate_khz; 1900 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1901 clock_rate_khz = 512; 1902 sample_rate_hz = 16000; 1903 } else { 1904 clock_rate_khz = 256; 1905 sample_rate_hz = 8000; 1906 } 1907 uint8_t clock_direction = 0; // master 1908 uint16_t frame_sync_duty_cycle = 0; // i2s with 50% 1909 uint8_t frame_sync_edge = 1; // rising edge 1910 uint8_t frame_sync_polarity = 0; // active high 1911 uint8_t reserved = 0; 1912 uint16_t size = 16; 1913 uint16_t chan_1_offset = 1; 1914 uint16_t chan_2_offset = chan_1_offset + size; 1915 uint8_t out_edge = 1; // rising 1916 uint8_t in_edge = 0; // falling 1917 hci_send_cmd(&hci_ti_write_codec_config, clock_rate_khz, clock_direction, sample_rate_hz, frame_sync_duty_cycle, 1918 frame_sync_edge, frame_sync_polarity, reserved, 1919 size, chan_1_offset, out_edge, size, chan_1_offset, in_edge, reserved, 1920 size, chan_2_offset, out_edge, size, chan_2_offset, in_edge, reserved); 1921 } 1922 #endif 1923 1924 #ifdef ENABLE_BCM_PCM_WBS 1925 void hfp_bcm_prepare_for_sco(hfp_connection_t * hfp_connection){ 1926 hfp_connection->bcm_send_write_i2spcm_interface_param = true; 1927 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1928 hfp_connection->bcm_send_enable_wbs = true; 1929 } 1930 } 1931 void hfp_bcm_write_i2spcm_interface_param(hfp_connection_t * hfp_connection){ 1932 uint8_t sample_rate = (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? 1 : 0; 1933 // i2s enable, master, 8/16 kHz, 512 kHz 1934 hci_send_cmd(&hci_bcm_write_i2spcm_interface_paramhci_bcm_write_i2spcm_interface_param, 1, 1, sample_rate, 2); 1935 } 1936 #endif 1937 1938 void hfp_set_hf_callback(btstack_packet_handler_t callback){ 1939 hfp_hf_callback = callback; 1940 } 1941 1942 void hfp_set_ag_callback(btstack_packet_handler_t callback){ 1943 hfp_ag_callback = callback; 1944 } 1945 1946 void hfp_set_ag_rfcomm_packet_handler(btstack_packet_handler_t handler){ 1947 hfp_ag_rfcomm_packet_handler = handler; 1948 } 1949 1950 void hfp_set_hf_rfcomm_packet_handler(btstack_packet_handler_t handler){ 1951 hfp_hf_rfcomm_packet_handler = handler; 1952 } 1953 1954 void hfp_init(void){ 1955 hfp_allowed_sco_packet_types = SCO_PACKET_TYPES_ALL; 1956 } 1957 1958 void hfp_deinit(void){ 1959 hfp_allowed_sco_packet_types = 0; 1960 hfp_connections = NULL; 1961 hfp_hf_callback = NULL; 1962 hfp_ag_callback = NULL; 1963 hfp_hf_rfcomm_packet_handler = NULL; 1964 hfp_ag_rfcomm_packet_handler = NULL; 1965 hfp_sco_establishment_active = NULL; 1966 (void) memset(&hfp_sdp_query_context, 0, sizeof(hfp_sdp_query_context_t)); 1967 (void) memset(&hfp_sdp_query_request, 0, sizeof(btstack_context_callback_registration_t)); 1968 } 1969 1970 void hfp_set_sco_packet_types(uint16_t packet_types){ 1971 hfp_allowed_sco_packet_types = packet_types; 1972 } 1973 1974 uint16_t hfp_get_sco_packet_types(void){ 1975 return hfp_allowed_sco_packet_types; 1976 } 1977 1978 hfp_link_settings_t hfp_next_link_setting(hfp_link_settings_t current_setting, bool local_eSCO_supported, bool remote_eSCO_supported, bool eSCO_S4_supported, uint8_t negotiated_codec){ 1979 int8_t setting = (int8_t) current_setting; 1980 bool can_use_eSCO = local_eSCO_supported && remote_eSCO_supported; 1981 while (setting > 0){ 1982 setting--; 1983 // skip if eSCO required but not available 1984 if (hfp_link_settings[setting].eSCO && !can_use_eSCO) continue; 1985 // skip if S4 but not supported 1986 if ((setting == (int8_t) HFP_LINK_SETTINGS_S4) && !eSCO_S4_supported) continue; 1987 // skip wrong codec 1988 if ( hfp_link_settings[setting].codec != negotiated_codec) continue; 1989 // skip disabled packet types 1990 uint16_t required_packet_types = hfp_link_settings[setting].packet_types; 1991 uint16_t allowed_packet_types = hfp_allowed_sco_packet_types; 1992 if ((required_packet_types & allowed_packet_types) == 0) continue; 1993 1994 // found matching setting 1995 return (hfp_link_settings_t) setting; 1996 } 1997 return HFP_LINK_SETTINGS_NONE; 1998 } 1999 2000 static hfp_link_settings_t hfp_next_link_setting_for_connection(hfp_link_settings_t current_setting, hfp_connection_t * hfp_connection, uint8_t eSCO_S4_supported){ 2001 bool local_eSCO_supported = hci_extended_sco_link_supported(); 2002 bool remote_eSCO_supported = hci_remote_esco_supported(hfp_connection->acl_handle); 2003 uint8_t negotiated_codec = hfp_connection->negotiated_codec; 2004 return hfp_next_link_setting(current_setting, local_eSCO_supported, remote_eSCO_supported, eSCO_S4_supported, negotiated_codec); 2005 } 2006 2007 void hfp_init_link_settings(hfp_connection_t * hfp_connection, uint8_t eSCO_S4_supported){ 2008 // get highest possible link setting 2009 hfp_connection->link_setting = hfp_next_link_setting_for_connection(HFP_LINK_SETTINGS_NONE, hfp_connection, eSCO_S4_supported); 2010 log_info("hfp_init_link_settings: %u", hfp_connection->link_setting); 2011 } 2012 2013 #define HFP_HF_RX_DEBUG_PRINT_LINE 80 2014 2015 void hfp_log_rfcomm_message(const char * tag, uint8_t * packet, uint16_t size){ 2016 #ifdef ENABLE_LOG_INFO 2017 // encode \n\r 2018 char printable[HFP_HF_RX_DEBUG_PRINT_LINE+2]; 2019 int i = 0; 2020 int pos; 2021 for (pos=0 ; (pos < size) && (i < (HFP_HF_RX_DEBUG_PRINT_LINE - 3)) ; pos++){ 2022 switch (packet[pos]){ 2023 case '\n': 2024 printable[i++] = '\\'; 2025 printable[i++] = 'n'; 2026 break; 2027 case '\r': 2028 printable[i++] = '\\'; 2029 printable[i++] = 'r'; 2030 break; 2031 default: 2032 printable[i++] = packet[pos]; 2033 break; 2034 } 2035 } 2036 printable[i] = 0; 2037 log_info("%s: '%s'", tag, printable); 2038 #endif 2039 } 2040