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 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__ "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->command = HFP_CMD_AG_SEND_COMMON_CODEC; 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 { "+VGS:", HFP_CMD_SET_SPEAKER_GAIN}, 1124 { "ERROR", HFP_CMD_ERROR}, 1125 { "NOP", HFP_CMD_NONE}, // dummy command used by unit tests 1126 { "OK", HFP_CMD_OK }, 1127 { "RING", HFP_CMD_RING }, 1128 }; 1129 1130 static hfp_command_t parse_command(const char * line_buffer, int isHandsFree){ 1131 1132 // table lookup based on role 1133 uint16_t num_entries; 1134 hfp_command_entry_t * table; 1135 if (isHandsFree == 0){ 1136 table = hfp_ag_commmand_table; 1137 num_entries = sizeof(hfp_ag_commmand_table) / sizeof(hfp_command_entry_t); 1138 } else { 1139 table = hfp_hf_commmand_table; 1140 num_entries = sizeof(hfp_hf_commmand_table) / sizeof(hfp_command_entry_t); 1141 } 1142 // binary search 1143 uint16_t left = 0; 1144 uint16_t right = num_entries - 1; 1145 while (left <= right){ 1146 uint16_t middle = left + (right - left) / 2; 1147 hfp_command_entry_t *entry = &table[middle]; 1148 int match = strcmp(line_buffer, entry->command); 1149 if (match < 0){ 1150 // search term is lower than middle element 1151 if (right == 0) break; 1152 right = middle - 1; 1153 } else if (match == 0){ 1154 return entry->command_id; 1155 } else { 1156 // search term is higher than middle element 1157 left = middle + 1; 1158 } 1159 } 1160 1161 // note: if parser in CMD_HEADER state would treats digits and maybe '+' as separator, match on "ATD" would work. 1162 // note: phone number is currently expected in line_buffer[3..] 1163 // prefix match on 'ATD', AG only 1164 if ((isHandsFree == 0) && (strncmp(line_buffer, HFP_CALL_PHONE_NUMBER, strlen(HFP_CALL_PHONE_NUMBER)) == 0)){ 1165 return HFP_CMD_CALL_PHONE_NUMBER; 1166 } 1167 1168 // Valid looking, but unknown commands/responses 1169 if ((isHandsFree == 0) && (strncmp(line_buffer, "AT+", 3) == 0)){ 1170 return HFP_CMD_UNKNOWN; 1171 } 1172 1173 if ((isHandsFree != 0) && (strncmp(line_buffer, "+", 1) == 0)){ 1174 return HFP_CMD_UNKNOWN; 1175 } 1176 1177 return HFP_CMD_NONE; 1178 } 1179 1180 static void hfp_parser_store_byte(hfp_connection_t * hfp_connection, uint8_t byte){ 1181 if ((hfp_connection->line_size + 1) >= HFP_MAX_VR_TEXT_SIZE) return; 1182 hfp_connection->line_buffer[hfp_connection->line_size++] = byte; 1183 hfp_connection->line_buffer[hfp_connection->line_size] = 0; 1184 } 1185 static int hfp_parser_is_buffer_empty(hfp_connection_t * hfp_connection){ 1186 return hfp_connection->line_size == 0; 1187 } 1188 1189 static int hfp_parser_is_end_of_line(uint8_t byte){ 1190 return (byte == '\n') || (byte == '\r'); 1191 } 1192 1193 static void hfp_parser_reset_line_buffer(hfp_connection_t *hfp_connection) { 1194 hfp_connection->line_size = 0; 1195 // hfp_connection->line_buffer[0] = 0; 1196 } 1197 1198 static void hfp_parser_store_if_token(hfp_connection_t * hfp_connection, uint8_t byte){ 1199 switch (byte){ 1200 case ',': 1201 case '-': 1202 case ';': 1203 case '(': 1204 case ')': 1205 case '\n': 1206 case '\r': 1207 break; 1208 default: 1209 hfp_parser_store_byte(hfp_connection, byte); 1210 break; 1211 } 1212 } 1213 1214 static bool hfp_parser_is_separator( uint8_t byte){ 1215 switch (byte){ 1216 case ',': 1217 case '-': 1218 case ';': 1219 case '\n': 1220 case '\r': 1221 return true; 1222 default: 1223 return false; 1224 } 1225 } 1226 1227 static bool hfp_parse_byte(hfp_connection_t * hfp_connection, uint8_t byte, int isHandsFree){ 1228 1229 // handle doubles quotes 1230 if (byte == '"'){ 1231 hfp_connection->parser_quoted = !hfp_connection->parser_quoted; 1232 return true; 1233 } 1234 if (hfp_connection->parser_quoted) { 1235 hfp_parser_store_byte(hfp_connection, byte); 1236 return true; 1237 } 1238 1239 // ignore spaces outside command or double quotes (required e.g. for '+CME ERROR:..") command 1240 if ((byte == ' ') && (hfp_connection->parser_state != HFP_PARSER_CMD_HEADER)) return true; 1241 1242 bool processed = true; 1243 1244 switch (hfp_connection->parser_state) { 1245 case HFP_PARSER_CMD_HEADER: 1246 switch (byte) { 1247 case '\n': 1248 case '\r': 1249 case ';': 1250 // ignore separator 1251 break; 1252 case ':': 1253 case '?': 1254 // store separator 1255 hfp_parser_store_byte(hfp_connection, byte); 1256 break; 1257 case '=': 1258 // equal sign: remember and wait for next char to decided between '=?' and '=\?' 1259 hfp_connection->found_equal_sign = true; 1260 hfp_parser_store_byte(hfp_connection, byte); 1261 return true; 1262 default: 1263 // store if not lookahead 1264 if (!hfp_connection->found_equal_sign) { 1265 hfp_parser_store_byte(hfp_connection, byte); 1266 return true; 1267 } 1268 // mark as lookahead 1269 processed = false; 1270 break; 1271 } 1272 1273 // ignore empty tokens 1274 if (hfp_parser_is_buffer_empty(hfp_connection)) return true; 1275 1276 // parse 1277 hfp_connection->command = parse_command((char *)hfp_connection->line_buffer, isHandsFree); 1278 1279 // pick +CIND version based on connection state: descriptions during SLC vs. states later 1280 if (hfp_connection->command == HFP_CMD_RETRIEVE_AG_INDICATORS_GENERIC){ 1281 switch(hfp_connection->state){ 1282 case HFP_W4_RETRIEVE_INDICATORS_STATUS: 1283 hfp_connection->command = HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS; 1284 break; 1285 case HFP_W4_RETRIEVE_INDICATORS: 1286 hfp_connection->command = HFP_CMD_RETRIEVE_AG_INDICATORS; 1287 break; 1288 default: 1289 hfp_connection->command = HFP_CMD_UNKNOWN; 1290 break; 1291 } 1292 } 1293 1294 log_info("command string '%s', handsfree %u -> cmd id %u", (char *)hfp_connection->line_buffer, isHandsFree, hfp_connection->command); 1295 1296 // next state 1297 hfp_connection->found_equal_sign = false; 1298 hfp_parser_reset_line_buffer(hfp_connection); 1299 hfp_connection->parser_state = HFP_PARSER_CMD_SEQUENCE; 1300 1301 return processed; 1302 1303 case HFP_PARSER_CMD_SEQUENCE: 1304 // handle empty fields 1305 if ((byte == ',' ) && (hfp_connection->line_size == 0)){ 1306 hfp_connection->line_buffer[0] = 0; 1307 hfp_connection->ignore_value = 1; 1308 parse_sequence(hfp_connection); 1309 return true; 1310 } 1311 1312 hfp_parser_store_if_token(hfp_connection, byte); 1313 if (!hfp_parser_is_separator(byte)) return true; 1314 1315 // ignore empty tokens 1316 switch (hfp_connection->command){ 1317 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 1318 // don't ignore empty string 1319 break; 1320 default: 1321 if (hfp_parser_is_buffer_empty(hfp_connection) && (hfp_connection->ignore_value == 0)) { 1322 return true; 1323 } 1324 break; 1325 } 1326 1327 parse_sequence(hfp_connection); 1328 1329 hfp_parser_reset_line_buffer(hfp_connection); 1330 1331 switch (hfp_connection->command){ 1332 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1333 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1334 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1335 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1336 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1337 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1338 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1339 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1340 case HFP_CMD_HF_INDICATOR_STATUS: 1341 hfp_connection->parser_state = HFP_PARSER_SECOND_ITEM; 1342 break; 1343 default: 1344 break; 1345 } 1346 return true; 1347 1348 case HFP_PARSER_SECOND_ITEM: 1349 1350 hfp_parser_store_if_token(hfp_connection, byte); 1351 if (!hfp_parser_is_separator(byte)) return true; 1352 1353 switch (hfp_connection->command){ 1354 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1355 log_info("format %s, ", hfp_connection->line_buffer); 1356 hfp_connection->network_operator.format = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1357 break; 1358 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1359 log_info("format %s \n", hfp_connection->line_buffer); 1360 hfp_connection->network_operator.format = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1361 break; 1362 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 1363 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 1364 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1365 hfp_connection->generic_status_indicators[hfp_connection->parser_item_index].state = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1366 break; 1367 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1368 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1369 log_info("%d \n", hfp_connection->ag_indicators[hfp_connection->parser_item_index].status); 1370 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status_changed = 1; 1371 break; 1372 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1373 hfp_connection->ag_indicators[hfp_connection->parser_item_index].min_range = btstack_atoi((char *)hfp_connection->line_buffer); 1374 log_info("%s, ", hfp_connection->line_buffer); 1375 break; 1376 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1377 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1378 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1379 hfp_connection->bnip_type = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1380 break; 1381 case HFP_CMD_HF_INDICATOR_STATUS: 1382 hfp_connection->parser_indicator_value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1383 break; 1384 default: 1385 break; 1386 } 1387 1388 hfp_parser_reset_line_buffer(hfp_connection); 1389 1390 hfp_connection->parser_state = HFP_PARSER_THIRD_ITEM; 1391 1392 return true; 1393 1394 case HFP_PARSER_THIRD_ITEM: 1395 1396 hfp_parser_store_if_token(hfp_connection, byte); 1397 if (!hfp_parser_is_separator(byte)) return true; 1398 1399 switch (hfp_connection->command){ 1400 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1401 strncpy(hfp_connection->network_operator.name, (char *)hfp_connection->line_buffer, HFP_MAX_NETWORK_OPERATOR_NAME_SIZE); 1402 hfp_connection->network_operator.name[HFP_MAX_NETWORK_OPERATOR_NAME_SIZE - 1] = 0; 1403 log_info("name %s\n", hfp_connection->line_buffer); 1404 break; 1405 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1406 hfp_connection->ag_indicators[hfp_connection->parser_item_index].max_range = btstack_atoi((char *)hfp_connection->line_buffer); 1407 hfp_next_indicators_index(hfp_connection); 1408 hfp_connection->ag_indicators_nr = hfp_connection->parser_item_index; 1409 log_info("%s)\n", hfp_connection->line_buffer); 1410 break; 1411 default: 1412 break; 1413 } 1414 1415 hfp_parser_reset_line_buffer(hfp_connection); 1416 1417 if (hfp_connection->command == HFP_CMD_RETRIEVE_AG_INDICATORS){ 1418 hfp_connection->parser_state = HFP_PARSER_CMD_SEQUENCE; 1419 } else { 1420 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 1421 } 1422 return true; 1423 1424 default: 1425 btstack_assert(false); 1426 return true; 1427 } 1428 } 1429 1430 void hfp_parse(hfp_connection_t * hfp_connection, uint8_t byte, int isHandsFree){ 1431 bool processed = false; 1432 while (!processed){ 1433 processed = hfp_parse_byte(hfp_connection, byte, isHandsFree); 1434 } 1435 // reset parser state on end-of-line 1436 if (hfp_parser_is_end_of_line(byte)){ 1437 hfp_connection->parser_item_index = 0; 1438 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 1439 } 1440 } 1441 1442 static void parse_sequence(hfp_connection_t * hfp_connection){ 1443 int value; 1444 switch (hfp_connection->command){ 1445 case HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS: 1446 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1447 int i; 1448 switch (hfp_connection->parser_item_index){ 1449 case 0: 1450 for (i=0;i<hfp_connection->generic_status_indicators_nr;i++){ 1451 if (hfp_connection->generic_status_indicators[i].uuid == value){ 1452 hfp_connection->parser_indicator_index = i; 1453 break; 1454 } 1455 } 1456 break; 1457 case 1: 1458 if (hfp_connection->parser_indicator_index <0) break; 1459 hfp_connection->generic_status_indicators[hfp_connection->parser_indicator_index].state = value; 1460 log_info("HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS set indicator at index %u, to %u\n", 1461 hfp_connection->parser_item_index, value); 1462 break; 1463 default: 1464 break; 1465 } 1466 hfp_next_indicators_index(hfp_connection); 1467 break; 1468 1469 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 1470 switch(hfp_connection->parser_item_index){ 1471 case 0: 1472 // <alpha>: This optional field is not supported, and shall be left blank. 1473 break; 1474 case 1: 1475 // <number>: Quoted string containing the phone number in the format specified by <type>. 1476 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1477 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1478 break; 1479 case 2: 1480 /* 1481 <type> field specifies the format of the phone number provided, and can be one of the following values: 1482 - 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. 1483 - 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. 1484 - values 160-175: National number. No prefix nor escape digits included. 1485 */ 1486 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1487 hfp_connection->bnip_type = value; 1488 break; 1489 case 3: 1490 // <speed>: This optional field is not supported, and shall be left blank. 1491 break; 1492 case 4: 1493 // <service>: Indicates which service this phone number relates to. Shall be either 4 (voice) or 5 (fax). 1494 default: 1495 break; 1496 } 1497 // index > 2 are ignored in switch above 1498 hfp_connection->parser_item_index++; 1499 break; 1500 case HFP_CMD_LIST_CURRENT_CALLS: 1501 switch(hfp_connection->parser_item_index){ 1502 case 0: 1503 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1504 hfp_connection->clcc_idx = value; 1505 break; 1506 case 1: 1507 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1508 hfp_connection->clcc_dir = value; 1509 break; 1510 case 2: 1511 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1512 hfp_connection->clcc_status = value; 1513 break; 1514 case 3: 1515 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1516 hfp_connection->clcc_mode = value; 1517 break; 1518 case 4: 1519 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1520 hfp_connection->clcc_mpty = value; 1521 break; 1522 case 5: 1523 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1524 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1525 break; 1526 case 6: 1527 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1528 hfp_connection->bnip_type = value; 1529 break; 1530 default: 1531 break; 1532 } 1533 // index > 6 are ignored in switch above 1534 hfp_connection->parser_item_index++; 1535 break; 1536 case HFP_CMD_SET_MICROPHONE_GAIN: 1537 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1538 hfp_connection->microphone_gain = value; 1539 log_info("hfp parse HFP_CMD_SET_MICROPHONE_GAIN %d\n", value); 1540 break; 1541 case HFP_CMD_SET_SPEAKER_GAIN: 1542 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1543 hfp_connection->speaker_gain = value; 1544 log_info("hfp parse HFP_CMD_SET_SPEAKER_GAIN %d\n", value); 1545 break; 1546 case HFP_CMD_TURN_OFF_EC_AND_NR: 1547 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1548 hfp_connection->ag_echo_and_noise_reduction = value; 1549 log_info("hfp parse HFP_CMD_TURN_OFF_EC_AND_NR %d\n", value); 1550 break; 1551 case HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING: 1552 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1553 hfp_connection->remote_supported_features = store_bit(hfp_connection->remote_supported_features, HFP_AGSF_IN_BAND_RING_TONE, value); 1554 log_info("hfp parse HFP_CHANGE_IN_BAND_RING_TONE_SETTING %d\n", value); 1555 break; 1556 case HFP_CMD_HF_CONFIRMED_CODEC: 1557 hfp_connection->codec_confirmed = btstack_atoi((char*)hfp_connection->line_buffer); 1558 log_info("hfp parse HFP_CMD_HF_CONFIRMED_CODEC %d\n", hfp_connection->codec_confirmed); 1559 break; 1560 case HFP_CMD_AG_SUGGESTED_CODEC: 1561 hfp_connection->suggested_codec = btstack_atoi((char*)hfp_connection->line_buffer); 1562 log_info("hfp parse HFP_CMD_AG_SUGGESTED_CODEC %d\n", hfp_connection->suggested_codec); 1563 break; 1564 case HFP_CMD_SUPPORTED_FEATURES: 1565 hfp_connection->remote_supported_features = btstack_atoi((char*)hfp_connection->line_buffer); 1566 log_info("Parsed supported feature %d\n", (int) hfp_connection->remote_supported_features); 1567 break; 1568 case HFP_CMD_AVAILABLE_CODECS: 1569 log_info("Parsed codec %s\n", hfp_connection->line_buffer); 1570 hfp_connection->remote_codecs[hfp_connection->parser_item_index] = (uint16_t)btstack_atoi((char*)hfp_connection->line_buffer); 1571 hfp_next_codec_index(hfp_connection); 1572 hfp_connection->remote_codecs_nr = hfp_connection->parser_item_index; 1573 break; 1574 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1575 strncpy((char *)hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, (char *)hfp_connection->line_buffer, HFP_MAX_INDICATOR_DESC_SIZE); 1576 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name[HFP_MAX_INDICATOR_DESC_SIZE-1] = 0; 1577 hfp_connection->ag_indicators[hfp_connection->parser_item_index].index = hfp_connection->parser_item_index+1; 1578 log_info("Indicator %d: %s (", hfp_connection->ag_indicators_nr+1, hfp_connection->line_buffer); 1579 break; 1580 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 1581 log_info("Parsed Indicator %d with status: %s\n", hfp_connection->parser_item_index+1, hfp_connection->line_buffer); 1582 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status = btstack_atoi((char *) hfp_connection->line_buffer); 1583 hfp_next_indicators_index(hfp_connection); 1584 break; 1585 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1586 hfp_next_indicators_index(hfp_connection); 1587 if (hfp_connection->parser_item_index != 4) break; 1588 log_info("Parsed Enable indicators: %s\n", hfp_connection->line_buffer); 1589 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1590 hfp_connection->enable_status_update_for_ag_indicators = (uint8_t) value; 1591 break; 1592 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 1593 log_info("Parsed Support call hold: %s\n", hfp_connection->line_buffer); 1594 if (hfp_connection->line_size > 2 ) break; 1595 memcpy((char *)hfp_connection->remote_call_services[hfp_connection->remote_call_services_index].name, (char *)hfp_connection->line_buffer, HFP_CALL_SERVICE_SIZE-1); 1596 hfp_connection->remote_call_services[hfp_connection->remote_call_services_index].name[HFP_CALL_SERVICE_SIZE - 1] = 0; 1597 hfp_next_remote_call_services_index(hfp_connection); 1598 break; 1599 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 1600 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 1601 log_info("Parsed Generic status indicator: %s\n", hfp_connection->line_buffer); 1602 hfp_connection->generic_status_indicators[hfp_connection->parser_item_index].uuid = (uint16_t)btstack_atoi((char*)hfp_connection->line_buffer); 1603 hfp_next_indicators_index(hfp_connection); 1604 hfp_connection->generic_status_indicators_nr = hfp_connection->parser_item_index; 1605 break; 1606 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1607 // HF parses inital AG gen. ind. state 1608 log_info("Parsed List generic status indicator %s state: ", hfp_connection->line_buffer); 1609 hfp_connection->parser_item_index = hfp_parse_indicator_index(hfp_connection); 1610 break; 1611 case HFP_CMD_HF_INDICATOR_STATUS: 1612 hfp_connection->parser_indicator_index = hfp_parse_indicator_index(hfp_connection); 1613 log_info("Parsed HF indicator index %u", hfp_connection->parser_indicator_index); 1614 break; 1615 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1616 // AG parses new gen. ind. state 1617 if (hfp_connection->ignore_value){ 1618 hfp_connection->ignore_value = 0; 1619 log_info("Parsed Enable AG indicator pos %u('%s') - unchanged (stays %u)\n", hfp_connection->parser_item_index, 1620 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, hfp_connection->ag_indicators[hfp_connection->parser_item_index].enabled); 1621 } 1622 else if (hfp_connection->ag_indicators[hfp_connection->parser_item_index].mandatory){ 1623 log_info("Parsed Enable AG indicator pos %u('%s') - ignore (mandatory)\n", 1624 hfp_connection->parser_item_index, hfp_connection->ag_indicators[hfp_connection->parser_item_index].name); 1625 } else { 1626 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1627 hfp_connection->ag_indicators[hfp_connection->parser_item_index].enabled = value; 1628 log_info("Parsed Enable AG indicator pos %u('%s'): %u\n", hfp_connection->parser_item_index, 1629 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, value); 1630 } 1631 hfp_next_indicators_index(hfp_connection); 1632 break; 1633 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1634 // indicators are indexed starting with 1 1635 hfp_connection->parser_item_index = hfp_parse_indicator_index(hfp_connection); 1636 log_info("Parsed status of the AG indicator %d, status ", hfp_connection->parser_item_index); 1637 break; 1638 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1639 hfp_connection->network_operator.mode = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1640 log_info("Parsed network operator mode: %d, ", hfp_connection->network_operator.mode); 1641 break; 1642 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1643 if (hfp_connection->line_buffer[0] == '3'){ 1644 log_info("Parsed Set network operator format : %s, ", hfp_connection->line_buffer); 1645 break; 1646 } 1647 // TODO emit ERROR, wrong format 1648 log_info("ERROR Set network operator format: index %s not supported\n", hfp_connection->line_buffer); 1649 break; 1650 case HFP_CMD_ERROR: 1651 break; 1652 case HFP_CMD_EXTENDED_AUDIO_GATEWAY_ERROR: 1653 hfp_connection->extended_audio_gateway_error = 1; 1654 hfp_connection->extended_audio_gateway_error_value = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1655 break; 1656 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1657 hfp_connection->enable_extended_audio_gateway_error_report = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1658 hfp_connection->ok_pending = 1; 1659 hfp_connection->extended_audio_gateway_error = 0; 1660 break; 1661 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1662 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1663 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1664 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1665 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1666 break; 1667 case HFP_CMD_CALL_HOLD: 1668 hfp_connection->ag_call_hold_action = hfp_connection->line_buffer[0] - '0'; 1669 if (hfp_connection->line_buffer[1] != '\0'){ 1670 hfp_connection->call_index = btstack_atoi((char *)&hfp_connection->line_buffer[1]); 1671 } 1672 break; 1673 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 1674 hfp_connection->ag_response_and_hold_action = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1675 break; 1676 case HFP_CMD_TRANSMIT_DTMF_CODES: 1677 hfp_connection->ag_dtmf_code = hfp_connection->line_buffer[0]; 1678 break; 1679 case HFP_CMD_ENABLE_CLIP: 1680 hfp_connection->clip_enabled = hfp_connection->line_buffer[0] != '0'; 1681 break; 1682 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 1683 hfp_connection->call_waiting_notification_enabled = hfp_connection->line_buffer[0] != '0'; 1684 break; 1685 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 1686 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1687 hfp_connection->ag_activate_voice_recognition_value = value; 1688 break; 1689 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 1690 switch(hfp_connection->parser_item_index){ 1691 case 0: 1692 hfp_connection->ag_vra_status = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1693 break; 1694 case 1: 1695 hfp_connection->ag_vra_state = (hfp_voice_recognition_state_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1696 break; 1697 case 2: 1698 hfp_connection->ag_msg.text_id = 0; 1699 for (i = 0 ; i < 4; i++){ 1700 hfp_connection->ag_msg.text_id = (hfp_connection->ag_msg.text_id << 4) | nibble_for_char(hfp_connection->line_buffer[i]); 1701 } 1702 break; 1703 case 3: 1704 hfp_connection->ag_msg.text_operation = (hfp_text_operation_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1705 break; 1706 case 4: 1707 hfp_connection->ag_msg.text_type = (hfp_text_type_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1708 break; 1709 case 5: 1710 hfp_connection->line_buffer[hfp_connection->line_size] = 0; 1711 hfp_connection->ag_vra_msg_length = hfp_connection->line_size + 1; 1712 break; 1713 default: 1714 break; 1715 } 1716 hfp_connection->parser_item_index++; 1717 break; 1718 default: 1719 break; 1720 } 1721 } 1722 1723 static void hfp_handle_start_sdp_client_query(void * context){ 1724 UNUSED(context); 1725 1726 btstack_linked_list_iterator_t it; 1727 btstack_linked_list_iterator_init(&it, &hfp_connections); 1728 while (btstack_linked_list_iterator_has_next(&it)){ 1729 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1730 1731 if (connection->state != HFP_W2_SEND_SDP_QUERY) continue; 1732 1733 connection->state = HFP_W4_SDP_QUERY_COMPLETE; 1734 hfp_sdp_query_context.local_role = connection->local_role; 1735 (void)memcpy(hfp_sdp_query_context.remote_address, connection->remote_addr, 6); 1736 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, connection->remote_addr, connection->service_uuid); 1737 return; 1738 } 1739 } 1740 1741 uint8_t hfp_establish_service_level_connection(bd_addr_t bd_addr, uint16_t service_uuid, hfp_role_t local_role){ 1742 hfp_connection_t * connection = get_hfp_connection_context_for_bd_addr(bd_addr, local_role); 1743 if (connection){ 1744 return ERROR_CODE_COMMAND_DISALLOWED; 1745 } 1746 1747 connection = hfp_create_connection(bd_addr, local_role); 1748 if (!connection){ 1749 return BTSTACK_MEMORY_ALLOC_FAILED; 1750 } 1751 1752 connection->state = HFP_W2_SEND_SDP_QUERY; 1753 1754 bd_addr_copy(connection->remote_addr, bd_addr); 1755 connection->service_uuid = service_uuid; 1756 1757 hfp_sdp_query_request.callback = &hfp_handle_start_sdp_client_query; 1758 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1759 (void) sdp_client_register_query_callback(&hfp_sdp_query_request); 1760 return ERROR_CODE_SUCCESS; 1761 } 1762 1763 void hfp_trigger_release_service_level_connection(hfp_connection_t * hfp_connection){ 1764 // called internally, NULL check already performed 1765 btstack_assert(hfp_connection != NULL); 1766 1767 hfp_trigger_release_audio_connection(hfp_connection); 1768 if (hfp_connection->state < HFP_W4_RFCOMM_CONNECTED){ 1769 hfp_connection->state = HFP_IDLE; 1770 return; 1771 } 1772 1773 if (hfp_connection->state == HFP_W4_RFCOMM_CONNECTED){ 1774 hfp_connection->state = HFP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 1775 return; 1776 } 1777 hfp_connection->release_slc_connection = 1; 1778 if (hfp_connection->state < HFP_W4_SCO_CONNECTED){ 1779 hfp_connection->state = HFP_W2_DISCONNECT_RFCOMM; 1780 return; 1781 } 1782 1783 if (hfp_connection->state < HFP_W4_SCO_DISCONNECTED){ 1784 hfp_connection->state = HFP_W2_DISCONNECT_SCO; 1785 hfp_connection->release_audio_connection = 1; 1786 return; 1787 } 1788 } 1789 1790 uint8_t hfp_trigger_release_audio_connection(hfp_connection_t * hfp_connection){ 1791 // called internally, NULL check already performed 1792 btstack_assert(hfp_connection != NULL); 1793 if (hfp_connection->state <= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 1794 return ERROR_CODE_COMMAND_DISALLOWED; 1795 } 1796 switch (hfp_connection->state) { 1797 case HFP_W2_CONNECT_SCO: 1798 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 1799 break; 1800 case HFP_W4_SCO_CONNECTED: 1801 case HFP_AUDIO_CONNECTION_ESTABLISHED: 1802 hfp_connection->release_audio_connection = 1; 1803 break; 1804 default: 1805 return ERROR_CODE_COMMAND_DISALLOWED; 1806 } 1807 return ERROR_CODE_SUCCESS; 1808 } 1809 1810 static const struct link_settings { 1811 const uint16_t max_latency; 1812 const uint8_t retransmission_effort; 1813 const uint16_t packet_types; 1814 const bool eSCO; 1815 const uint8_t codec; 1816 } hfp_link_settings [] = { 1817 { 0xffff, 0xff, SCO_PACKET_TYPES_HV1, false, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_D0 1818 { 0xffff, 0xff, SCO_PACKET_TYPES_HV3, false, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_D1 1819 { 0x0007, 0x01, SCO_PACKET_TYPES_EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S1 1820 { 0x0007, 0x01, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S2 1821 { 0x000a, 0x01, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S3 1822 { 0x000c, 0x02, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S4 1823 { 0x0008, 0x02, SCO_PACKET_TYPES_EV3, true, HFP_CODEC_MSBC }, // HFP_LINK_SETTINGS_T1 1824 { 0x000d, 0x02, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_MSBC } // HFP_LINK_SETTINGS_T2 1825 }; 1826 1827 void hfp_setup_synchronous_connection(hfp_connection_t * hfp_connection){ 1828 // all packet types, fixed bandwidth 1829 int setting = hfp_connection->link_setting; 1830 log_info("hfp_setup_synchronous_connection using setting nr %u", setting); 1831 hfp_sco_establishment_active = hfp_connection; 1832 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 1833 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1834 #ifdef ENABLE_BCM_PCM_WBS 1835 sco_voice_setting = 0x0063; // Transparent data, 16-bit for BCM controllers 1836 #else 1837 sco_voice_setting = 0x0043; // Transparent data, 8-bit otherwise 1838 #endif 1839 } 1840 // get packet types - bits 6-9 are 'don't allow' 1841 uint16_t packet_types = hfp_link_settings[setting].packet_types ^ 0x03c0; 1842 hci_send_cmd(&hci_setup_synchronous_connection, hfp_connection->acl_handle, 8000, 8000, hfp_link_settings[setting].max_latency, 1843 sco_voice_setting, hfp_link_settings[setting].retransmission_effort, packet_types); 1844 } 1845 1846 void hfp_accept_synchronous_connection(hfp_connection_t * hfp_connection, bool incoming_eSCO){ 1847 1848 // remote supported feature eSCO is set if link type is eSCO 1849 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 1850 uint16_t max_latency; 1851 uint8_t retransmission_effort; 1852 uint16_t packet_types; 1853 1854 if (incoming_eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(hfp_connection->acl_handle)){ 1855 max_latency = 0x000c; 1856 retransmission_effort = 0x02; 1857 // eSCO: EV3 and 2-EV3 1858 packet_types = 0x0048; 1859 } else { 1860 max_latency = 0xffff; 1861 retransmission_effort = 0xff; 1862 // sco: HV1 and HV3 1863 packet_types = 0x005; 1864 } 1865 1866 // mSBC only allows for transparent data 1867 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 1868 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1869 #ifdef ENABLE_BCM_PCM_WBS 1870 sco_voice_setting = 0x0063; // Transparent data, 16-bit for BCM controllers 1871 #else 1872 sco_voice_setting = 0x0043; // Transparent data, 8-bit otherwise 1873 #endif 1874 } 1875 1876 // filter packet types 1877 packet_types &= hfp_get_sco_packet_types(); 1878 1879 // bits 6-9 are 'don't allow' 1880 packet_types ^= 0x3c0; 1881 1882 log_info("HFP: sending hci_accept_connection_request, packet types 0x%04x, sco_voice_setting 0x%02x", packet_types, sco_voice_setting); 1883 hci_send_cmd(&hci_accept_synchronous_connection, hfp_connection->remote_addr, 8000, 8000, max_latency, 1884 sco_voice_setting, retransmission_effort, packet_types); 1885 } 1886 1887 #ifdef ENABLE_CC256X_ASSISTED_HFP 1888 void hfp_cc256x_prepare_for_sco(hfp_connection_t * hfp_connection){ 1889 hfp_connection->cc256x_send_write_codec_config = true; 1890 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1891 hfp_connection->cc256x_send_wbs_associate = true; 1892 } 1893 } 1894 1895 void hfp_cc256x_write_codec_config(hfp_connection_t * hfp_connection){ 1896 uint32_t sample_rate_hz; 1897 uint16_t clock_rate_khz; 1898 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1899 clock_rate_khz = 512; 1900 sample_rate_hz = 16000; 1901 } else { 1902 clock_rate_khz = 256; 1903 sample_rate_hz = 8000; 1904 } 1905 uint8_t clock_direction = 0; // master 1906 uint16_t frame_sync_duty_cycle = 0; // i2s with 50% 1907 uint8_t frame_sync_edge = 1; // rising edge 1908 uint8_t frame_sync_polarity = 0; // active high 1909 uint8_t reserved = 0; 1910 uint16_t size = 16; 1911 uint16_t chan_1_offset = 1; 1912 uint16_t chan_2_offset = chan_1_offset + size; 1913 uint8_t out_edge = 1; // rising 1914 uint8_t in_edge = 0; // falling 1915 hci_send_cmd(&hci_ti_write_codec_config, clock_rate_khz, clock_direction, sample_rate_hz, frame_sync_duty_cycle, 1916 frame_sync_edge, frame_sync_polarity, reserved, 1917 size, chan_1_offset, out_edge, size, chan_1_offset, in_edge, reserved, 1918 size, chan_2_offset, out_edge, size, chan_2_offset, in_edge, reserved); 1919 } 1920 #endif 1921 1922 #ifdef ENABLE_BCM_PCM_WBS 1923 void hfp_bcm_prepare_for_sco(hfp_connection_t * hfp_connection){ 1924 hfp_connection->bcm_send_write_i2spcm_interface_param = true; 1925 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1926 hfp_connection->bcm_send_enable_wbs = true; 1927 } 1928 } 1929 void hfp_bcm_write_i2spcm_interface_param(hfp_connection_t * hfp_connection){ 1930 uint8_t sample_rate = (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? 1 : 0; 1931 // i2s enable, master, 8/16 kHz, 512 kHz 1932 hci_send_cmd(&hci_bcm_write_i2spcm_interface_paramhci_bcm_write_i2spcm_interface_param, 1, 1, sample_rate, 2); 1933 } 1934 #endif 1935 1936 void hfp_set_hf_callback(btstack_packet_handler_t callback){ 1937 hfp_hf_callback = callback; 1938 } 1939 1940 void hfp_set_ag_callback(btstack_packet_handler_t callback){ 1941 hfp_ag_callback = callback; 1942 } 1943 1944 void hfp_set_ag_rfcomm_packet_handler(btstack_packet_handler_t handler){ 1945 hfp_ag_rfcomm_packet_handler = handler; 1946 } 1947 1948 void hfp_set_hf_rfcomm_packet_handler(btstack_packet_handler_t handler){ 1949 hfp_hf_rfcomm_packet_handler = handler; 1950 } 1951 1952 void hfp_init(void){ 1953 hfp_allowed_sco_packet_types = SCO_PACKET_TYPES_ALL; 1954 } 1955 1956 void hfp_deinit(void){ 1957 hfp_allowed_sco_packet_types = 0; 1958 hfp_connections = NULL; 1959 hfp_hf_callback = NULL; 1960 hfp_ag_callback = NULL; 1961 hfp_hf_rfcomm_packet_handler = NULL; 1962 hfp_ag_rfcomm_packet_handler = NULL; 1963 hfp_sco_establishment_active = NULL; 1964 (void) memset(&hfp_sdp_query_context, 0, sizeof(hfp_sdp_query_context_t)); 1965 (void) memset(&hfp_sdp_query_request, 0, sizeof(btstack_context_callback_registration_t)); 1966 } 1967 1968 void hfp_set_sco_packet_types(uint16_t packet_types){ 1969 hfp_allowed_sco_packet_types = packet_types; 1970 } 1971 1972 uint16_t hfp_get_sco_packet_types(void){ 1973 return hfp_allowed_sco_packet_types; 1974 } 1975 1976 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){ 1977 int8_t setting = (int8_t) current_setting; 1978 bool can_use_eSCO = local_eSCO_supported && remote_eSCO_supported; 1979 while (setting > 0){ 1980 setting--; 1981 // skip if eSCO required but not available 1982 if (hfp_link_settings[setting].eSCO && !can_use_eSCO) continue; 1983 // skip if S4 but not supported 1984 if ((setting == (int8_t) HFP_LINK_SETTINGS_S4) && !eSCO_S4_supported) continue; 1985 // skip wrong codec 1986 if ( hfp_link_settings[setting].codec != negotiated_codec) continue; 1987 // skip disabled packet types 1988 uint16_t required_packet_types = hfp_link_settings[setting].packet_types; 1989 uint16_t allowed_packet_types = hfp_allowed_sco_packet_types; 1990 if ((required_packet_types & allowed_packet_types) == 0) continue; 1991 1992 // found matching setting 1993 return (hfp_link_settings_t) setting; 1994 } 1995 return HFP_LINK_SETTINGS_NONE; 1996 } 1997 1998 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){ 1999 bool local_eSCO_supported = hci_extended_sco_link_supported(); 2000 bool remote_eSCO_supported = hci_remote_esco_supported(hfp_connection->acl_handle); 2001 uint8_t negotiated_codec = hfp_connection->negotiated_codec; 2002 return hfp_next_link_setting(current_setting, local_eSCO_supported, remote_eSCO_supported, eSCO_S4_supported, negotiated_codec); 2003 } 2004 2005 void hfp_init_link_settings(hfp_connection_t * hfp_connection, uint8_t eSCO_S4_supported){ 2006 // get highest possible link setting 2007 hfp_connection->link_setting = hfp_next_link_setting_for_connection(HFP_LINK_SETTINGS_NONE, hfp_connection, eSCO_S4_supported); 2008 log_info("hfp_init_link_settings: %u", hfp_connection->link_setting); 2009 } 2010 2011 #define HFP_HF_RX_DEBUG_PRINT_LINE 80 2012 2013 void hfp_log_rfcomm_message(const char * tag, uint8_t * packet, uint16_t size){ 2014 #ifdef ENABLE_LOG_INFO 2015 // encode \n\r 2016 char printable[HFP_HF_RX_DEBUG_PRINT_LINE+2]; 2017 int i = 0; 2018 int pos; 2019 for (pos=0 ; (pos < size) && (i < (HFP_HF_RX_DEBUG_PRINT_LINE - 3)) ; pos++){ 2020 switch (packet[pos]){ 2021 case '\n': 2022 printable[i++] = '\\'; 2023 printable[i++] = 'n'; 2024 break; 2025 case '\r': 2026 printable[i++] = '\\'; 2027 printable[i++] = 'r'; 2028 break; 2029 default: 2030 printable[i++] = packet[pos]; 2031 break; 2032 } 2033 } 2034 printable[i] = 0; 2035 log_info("%s: '%s'", tag, printable); 2036 #endif 2037 } 2038