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 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 1007 1008 rfcomm_event_channel_opened_get_bd_addr(packet, event_addr); 1009 status = rfcomm_event_channel_opened_get_status(packet); 1010 1011 hfp_connection = get_hfp_connection_context_for_bd_addr(event_addr, local_role); 1012 if (!hfp_connection || (hfp_connection->state != HFP_W4_RFCOMM_CONNECTED)) return; 1013 1014 if (status) { 1015 hfp_emit_slc_connection_event(hfp_connection, status, rfcomm_event_channel_opened_get_con_handle(packet), event_addr); 1016 hfp_finalize_connection_context(hfp_connection); 1017 } else { 1018 hfp_connection->acl_handle = rfcomm_event_channel_opened_get_con_handle(packet); 1019 hfp_connection->rfcomm_cid = rfcomm_event_channel_opened_get_rfcomm_cid(packet); 1020 bd_addr_copy(hfp_connection->remote_addr, event_addr); 1021 1022 switch (hfp_connection->state){ 1023 case HFP_W4_RFCOMM_CONNECTED: 1024 hfp_connection->state = HFP_EXCHANGE_SUPPORTED_FEATURES; 1025 break; 1026 case HFP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN: 1027 hfp_connection->state = HFP_W2_DISCONNECT_RFCOMM; 1028 break; 1029 default: 1030 break; 1031 } 1032 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1033 } 1034 break; 1035 1036 case RFCOMM_EVENT_CHANNEL_CLOSED: 1037 rfcomm_cid = little_endian_read_16(packet,2); 1038 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 1039 if (!hfp_connection) break; 1040 switch (hfp_connection->state){ 1041 case HFP_W4_RFCOMM_DISCONNECTED_AND_RESTART: 1042 hfp_connection->acl_handle = HCI_CON_HANDLE_INVALID; 1043 hfp_connection->state = HFP_IDLE; 1044 hfp_establish_service_level_connection(hfp_connection->remote_addr, hfp_connection->service_uuid, local_role); 1045 break; 1046 1047 case HFP_AUDIO_CONNECTION_ESTABLISHED: 1048 // service connection was released, this implicitly releases audio connection as well 1049 hfp_connection->release_audio_connection = 0; 1050 hfp_connection->acl_handle = HCI_CON_HANDLE_INVALID; 1051 hfp_connection->state = HFP_W4_SCO_DISCONNECTED_TO_SHUTDOWN; 1052 gap_disconnect(hfp_connection->sco_handle); 1053 break; 1054 1055 default: 1056 // regular case 1057 hfp_reset_voice_recognition(hfp_connection); 1058 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SERVICE_LEVEL_CONNECTION_RELEASED, 0); 1059 hfp_finalize_connection_context(hfp_connection); 1060 break; 1061 } 1062 break; 1063 1064 default: 1065 break; 1066 } 1067 } 1068 // translates command string into hfp_command_t CMD 1069 1070 typedef struct { 1071 const char * command; 1072 hfp_command_t command_id; 1073 } hfp_command_entry_t; 1074 1075 static hfp_command_entry_t hfp_ag_commmand_table[] = { 1076 { "AT+BAC=", HFP_CMD_AVAILABLE_CODECS }, 1077 { "AT+BCC", HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP }, 1078 { "AT+BCS=", HFP_CMD_HF_CONFIRMED_CODEC }, 1079 { "AT+BIA=", HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE, }, // +BIA:<enabled>,,<enabled>,,,<enabled> 1080 { "AT+BIEV=", HFP_CMD_HF_INDICATOR_STATUS }, 1081 { "AT+BIND=", HFP_CMD_LIST_GENERIC_STATUS_INDICATORS }, 1082 { "AT+BIND=?", HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS }, 1083 { "AT+BIND?", HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE }, 1084 { "AT+BINP=", HFP_CMD_HF_REQUEST_PHONE_NUMBER }, 1085 { "AT+BLDN", HFP_CMD_REDIAL_LAST_NUMBER }, 1086 { "AT+BRSF=", HFP_CMD_SUPPORTED_FEATURES }, 1087 { "AT+BTRH=", HFP_CMD_RESPONSE_AND_HOLD_COMMAND }, 1088 { "AT+BTRH?", HFP_CMD_RESPONSE_AND_HOLD_QUERY }, 1089 { "AT+BVRA=", HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION }, 1090 { "AT+CCWA=", HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION}, 1091 { "AT+CHLD=", HFP_CMD_CALL_HOLD }, 1092 { "AT+CHLD=?", HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES }, 1093 { "AT+CHUP", HFP_CMD_HANG_UP_CALL }, 1094 { "AT+CIND=?", HFP_CMD_RETRIEVE_AG_INDICATORS }, 1095 { "AT+CIND?", HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS }, 1096 { "AT+CLCC", HFP_CMD_LIST_CURRENT_CALLS }, 1097 { "AT+CLIP=", HFP_CMD_ENABLE_CLIP}, 1098 { "AT+CMEE=", HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR}, 1099 { "AT+CMER=", HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE }, 1100 { "AT+CNUM", HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION }, 1101 { "AT+COPS=", HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT }, 1102 { "AT+COPS?", HFP_CMD_QUERY_OPERATOR_SELECTION_NAME }, 1103 { "AT+NREC=", HFP_CMD_TURN_OFF_EC_AND_NR, }, 1104 { "AT+VGM=", HFP_CMD_SET_MICROPHONE_GAIN }, 1105 { "AT+VGS=", HFP_CMD_SET_SPEAKER_GAIN }, 1106 { "AT+VTS=", HFP_CMD_TRANSMIT_DTMF_CODES }, 1107 { "ATA", HFP_CMD_CALL_ANSWERED }, 1108 }; 1109 1110 static hfp_command_entry_t hfp_hf_commmand_table[] = { 1111 { "+BCS:", HFP_CMD_AG_SUGGESTED_CODEC }, 1112 { "+BIND:", HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS }, 1113 { "+BINP", HFP_CMD_AG_SENT_PHONE_NUMBER }, 1114 { "+BRSF:", HFP_CMD_SUPPORTED_FEATURES }, 1115 { "+BSIR:", HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING }, 1116 { "+BTRH:", HFP_CMD_RESPONSE_AND_HOLD_STATUS }, 1117 { "+BVRA:", HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION }, 1118 { "+CCWA:", HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE, }, 1119 { "+CHLD:", HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES }, 1120 { "+CIEV:", HFP_CMD_TRANSFER_AG_INDICATOR_STATUS}, 1121 { "+CIND:", HFP_CMD_RETRIEVE_AG_INDICATORS_GENERIC }, 1122 { "+CLCC:", HFP_CMD_LIST_CURRENT_CALLS }, 1123 { "+CLIP:", HFP_CMD_AG_SENT_CLIP_INFORMATION }, 1124 { "+CME ERROR:", HFP_CMD_EXTENDED_AUDIO_GATEWAY_ERROR }, 1125 { "+CNUM:", HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION}, 1126 { "+COPS:", HFP_CMD_QUERY_OPERATOR_SELECTION_NAME }, 1127 { "+VGM:", HFP_CMD_SET_MICROPHONE_GAIN }, 1128 { "+VGS:", HFP_CMD_SET_SPEAKER_GAIN}, 1129 { "ERROR", HFP_CMD_ERROR}, 1130 { "NOP", HFP_CMD_NONE}, // dummy command used by unit tests 1131 { "OK", HFP_CMD_OK }, 1132 { "RING", HFP_CMD_RING }, 1133 }; 1134 1135 static hfp_command_t parse_command(const char * line_buffer, int isHandsFree){ 1136 1137 // table lookup based on role 1138 uint16_t num_entries; 1139 hfp_command_entry_t * table; 1140 if (isHandsFree == 0){ 1141 table = hfp_ag_commmand_table; 1142 num_entries = sizeof(hfp_ag_commmand_table) / sizeof(hfp_command_entry_t); 1143 } else { 1144 table = hfp_hf_commmand_table; 1145 num_entries = sizeof(hfp_hf_commmand_table) / sizeof(hfp_command_entry_t); 1146 } 1147 // binary search 1148 uint16_t left = 0; 1149 uint16_t right = num_entries - 1; 1150 while (left <= right){ 1151 uint16_t middle = left + (right - left) / 2; 1152 hfp_command_entry_t *entry = &table[middle]; 1153 int match = strcmp(line_buffer, entry->command); 1154 if (match < 0){ 1155 // search term is lower than middle element 1156 if (right == 0) break; 1157 right = middle - 1; 1158 } else if (match == 0){ 1159 return entry->command_id; 1160 } else { 1161 // search term is higher than middle element 1162 left = middle + 1; 1163 } 1164 } 1165 1166 // note: if parser in CMD_HEADER state would treats digits and maybe '+' as separator, match on "ATD" would work. 1167 // note: phone number is currently expected in line_buffer[3..] 1168 // prefix match on 'ATD', AG only 1169 if ((isHandsFree == 0) && (strncmp(line_buffer, HFP_CALL_PHONE_NUMBER, strlen(HFP_CALL_PHONE_NUMBER)) == 0)){ 1170 return HFP_CMD_CALL_PHONE_NUMBER; 1171 } 1172 1173 // Valid looking, but unknown commands/responses 1174 if ((isHandsFree == 0) && (strncmp(line_buffer, "AT+", 3) == 0)){ 1175 return HFP_CMD_UNKNOWN; 1176 } 1177 1178 if ((isHandsFree != 0) && (strncmp(line_buffer, "+", 1) == 0)){ 1179 return HFP_CMD_UNKNOWN; 1180 } 1181 1182 return HFP_CMD_NONE; 1183 } 1184 1185 static void hfp_parser_store_byte(hfp_connection_t * hfp_connection, uint8_t byte){ 1186 if ((hfp_connection->line_size + 1) >= HFP_MAX_VR_TEXT_SIZE) return; 1187 hfp_connection->line_buffer[hfp_connection->line_size++] = byte; 1188 hfp_connection->line_buffer[hfp_connection->line_size] = 0; 1189 } 1190 static int hfp_parser_is_buffer_empty(hfp_connection_t * hfp_connection){ 1191 return hfp_connection->line_size == 0; 1192 } 1193 1194 static int hfp_parser_is_end_of_line(uint8_t byte){ 1195 return (byte == '\n') || (byte == '\r'); 1196 } 1197 1198 static void hfp_parser_reset_line_buffer(hfp_connection_t *hfp_connection) { 1199 hfp_connection->line_size = 0; 1200 // hfp_connection->line_buffer[0] = 0; 1201 } 1202 1203 static void hfp_parser_store_if_token(hfp_connection_t * hfp_connection, uint8_t byte){ 1204 switch (byte){ 1205 case ',': 1206 case '-': 1207 case ';': 1208 case '(': 1209 case ')': 1210 case '\n': 1211 case '\r': 1212 break; 1213 default: 1214 hfp_parser_store_byte(hfp_connection, byte); 1215 break; 1216 } 1217 } 1218 1219 static bool hfp_parser_is_separator( uint8_t byte){ 1220 switch (byte){ 1221 case ',': 1222 case '-': 1223 case ';': 1224 case '\n': 1225 case '\r': 1226 return true; 1227 default: 1228 return false; 1229 } 1230 } 1231 1232 static bool hfp_parse_byte(hfp_connection_t * hfp_connection, uint8_t byte, int isHandsFree){ 1233 1234 // handle doubles quotes 1235 if (byte == '"'){ 1236 hfp_connection->parser_quoted = !hfp_connection->parser_quoted; 1237 return true; 1238 } 1239 if (hfp_connection->parser_quoted) { 1240 hfp_parser_store_byte(hfp_connection, byte); 1241 return true; 1242 } 1243 1244 // ignore spaces outside command or double quotes (required e.g. for '+CME ERROR:..") command 1245 if ((byte == ' ') && (hfp_connection->parser_state != HFP_PARSER_CMD_HEADER)) return true; 1246 1247 bool processed = true; 1248 1249 switch (hfp_connection->parser_state) { 1250 case HFP_PARSER_CMD_HEADER: 1251 switch (byte) { 1252 case '\n': 1253 case '\r': 1254 case ';': 1255 // ignore separator 1256 break; 1257 case ':': 1258 case '?': 1259 // store separator 1260 hfp_parser_store_byte(hfp_connection, byte); 1261 break; 1262 case '=': 1263 // equal sign: remember and wait for next char to decided between '=?' and '=\?' 1264 hfp_connection->found_equal_sign = true; 1265 hfp_parser_store_byte(hfp_connection, byte); 1266 return true; 1267 default: 1268 // store if not lookahead 1269 if (!hfp_connection->found_equal_sign) { 1270 hfp_parser_store_byte(hfp_connection, byte); 1271 return true; 1272 } 1273 // mark as lookahead 1274 processed = false; 1275 break; 1276 } 1277 1278 // ignore empty tokens 1279 if (hfp_parser_is_buffer_empty(hfp_connection)) return true; 1280 1281 // parse 1282 hfp_connection->command = parse_command((char *)hfp_connection->line_buffer, isHandsFree); 1283 1284 // pick +CIND version based on connection state: descriptions during SLC vs. states later 1285 if (hfp_connection->command == HFP_CMD_RETRIEVE_AG_INDICATORS_GENERIC){ 1286 switch(hfp_connection->state){ 1287 case HFP_W4_RETRIEVE_INDICATORS_STATUS: 1288 hfp_connection->command = HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS; 1289 break; 1290 case HFP_W4_RETRIEVE_INDICATORS: 1291 hfp_connection->command = HFP_CMD_RETRIEVE_AG_INDICATORS; 1292 break; 1293 default: 1294 hfp_connection->command = HFP_CMD_UNKNOWN; 1295 break; 1296 } 1297 } 1298 1299 log_info("command string '%s', handsfree %u -> cmd id %u", (char *)hfp_connection->line_buffer, isHandsFree, hfp_connection->command); 1300 1301 // next state 1302 hfp_connection->found_equal_sign = false; 1303 hfp_parser_reset_line_buffer(hfp_connection); 1304 hfp_connection->parser_state = HFP_PARSER_CMD_SEQUENCE; 1305 1306 return processed; 1307 1308 case HFP_PARSER_CMD_SEQUENCE: 1309 // handle empty fields 1310 if ((byte == ',' ) && (hfp_connection->line_size == 0)){ 1311 hfp_connection->line_buffer[0] = 0; 1312 hfp_connection->ignore_value = 1; 1313 parse_sequence(hfp_connection); 1314 return true; 1315 } 1316 1317 hfp_parser_store_if_token(hfp_connection, byte); 1318 if (!hfp_parser_is_separator(byte)) return true; 1319 1320 // ignore empty tokens 1321 if (hfp_parser_is_buffer_empty(hfp_connection) && (hfp_connection->ignore_value == 0)) return true; 1322 1323 parse_sequence(hfp_connection); 1324 1325 hfp_parser_reset_line_buffer(hfp_connection); 1326 1327 switch (hfp_connection->command){ 1328 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1329 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1330 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1331 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1332 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1333 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1334 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1335 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1336 case HFP_CMD_HF_INDICATOR_STATUS: 1337 hfp_connection->parser_state = HFP_PARSER_SECOND_ITEM; 1338 break; 1339 default: 1340 break; 1341 } 1342 return true; 1343 1344 case HFP_PARSER_SECOND_ITEM: 1345 1346 hfp_parser_store_if_token(hfp_connection, byte); 1347 if (!hfp_parser_is_separator(byte)) return true; 1348 1349 switch (hfp_connection->command){ 1350 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1351 log_info("format %s, ", hfp_connection->line_buffer); 1352 hfp_connection->network_operator.format = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1353 break; 1354 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1355 log_info("format %s \n", hfp_connection->line_buffer); 1356 hfp_connection->network_operator.format = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1357 break; 1358 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 1359 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 1360 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1361 hfp_connection->generic_status_indicators[hfp_connection->parser_item_index].state = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1362 break; 1363 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1364 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1365 log_info("%d \n", hfp_connection->ag_indicators[hfp_connection->parser_item_index].status); 1366 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status_changed = 1; 1367 break; 1368 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1369 hfp_connection->ag_indicators[hfp_connection->parser_item_index].min_range = btstack_atoi((char *)hfp_connection->line_buffer); 1370 log_info("%s, ", hfp_connection->line_buffer); 1371 break; 1372 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1373 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1374 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1375 hfp_connection->bnip_type = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1376 break; 1377 case HFP_CMD_HF_INDICATOR_STATUS: 1378 hfp_connection->parser_indicator_value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1379 break; 1380 default: 1381 break; 1382 } 1383 1384 hfp_parser_reset_line_buffer(hfp_connection); 1385 1386 hfp_connection->parser_state = HFP_PARSER_THIRD_ITEM; 1387 1388 return true; 1389 1390 case HFP_PARSER_THIRD_ITEM: 1391 1392 hfp_parser_store_if_token(hfp_connection, byte); 1393 if (!hfp_parser_is_separator(byte)) return true; 1394 1395 switch (hfp_connection->command){ 1396 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1397 strncpy(hfp_connection->network_operator.name, (char *)hfp_connection->line_buffer, HFP_MAX_NETWORK_OPERATOR_NAME_SIZE); 1398 hfp_connection->network_operator.name[HFP_MAX_NETWORK_OPERATOR_NAME_SIZE - 1] = 0; 1399 log_info("name %s\n", hfp_connection->line_buffer); 1400 break; 1401 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1402 hfp_connection->ag_indicators[hfp_connection->parser_item_index].max_range = btstack_atoi((char *)hfp_connection->line_buffer); 1403 hfp_next_indicators_index(hfp_connection); 1404 hfp_connection->ag_indicators_nr = hfp_connection->parser_item_index; 1405 log_info("%s)\n", hfp_connection->line_buffer); 1406 break; 1407 default: 1408 break; 1409 } 1410 1411 hfp_parser_reset_line_buffer(hfp_connection); 1412 1413 if (hfp_connection->command == HFP_CMD_RETRIEVE_AG_INDICATORS){ 1414 hfp_connection->parser_state = HFP_PARSER_CMD_SEQUENCE; 1415 } else { 1416 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 1417 } 1418 return true; 1419 1420 default: 1421 btstack_assert(false); 1422 return true; 1423 } 1424 } 1425 1426 void hfp_parse(hfp_connection_t * hfp_connection, uint8_t byte, int isHandsFree){ 1427 bool processed = false; 1428 while (!processed){ 1429 processed = hfp_parse_byte(hfp_connection, byte, isHandsFree); 1430 } 1431 // reset parser state on end-of-line 1432 if (hfp_parser_is_end_of_line(byte)){ 1433 hfp_connection->parser_item_index = 0; 1434 hfp_connection->parser_state = HFP_PARSER_CMD_HEADER; 1435 } 1436 } 1437 1438 static void parse_sequence(hfp_connection_t * hfp_connection){ 1439 int value; 1440 switch (hfp_connection->command){ 1441 case HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS: 1442 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1443 int i; 1444 switch (hfp_connection->parser_item_index){ 1445 case 0: 1446 for (i=0;i<hfp_connection->generic_status_indicators_nr;i++){ 1447 if (hfp_connection->generic_status_indicators[i].uuid == value){ 1448 hfp_connection->parser_indicator_index = i; 1449 break; 1450 } 1451 } 1452 break; 1453 case 1: 1454 if (hfp_connection->parser_indicator_index <0) break; 1455 hfp_connection->generic_status_indicators[hfp_connection->parser_indicator_index].state = value; 1456 log_info("HFP_CMD_SET_GENERIC_STATUS_INDICATOR_STATUS set indicator at index %u, to %u\n", 1457 hfp_connection->parser_item_index, value); 1458 break; 1459 default: 1460 break; 1461 } 1462 hfp_next_indicators_index(hfp_connection); 1463 break; 1464 1465 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 1466 switch(hfp_connection->parser_item_index){ 1467 case 0: 1468 // <alpha>: This optional field is not supported, and shall be left blank. 1469 break; 1470 case 1: 1471 // <number>: Quoted string containing the phone number in the format specified by <type>. 1472 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1473 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1474 break; 1475 case 2: 1476 /* 1477 <type> field specifies the format of the phone number provided, and can be one of the following values: 1478 - 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. 1479 - 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. 1480 - values 160-175: National number. No prefix nor escape digits included. 1481 */ 1482 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1483 hfp_connection->bnip_type = value; 1484 break; 1485 case 3: 1486 // <speed>: This optional field is not supported, and shall be left blank. 1487 break; 1488 case 4: 1489 // <service>: Indicates which service this phone number relates to. Shall be either 4 (voice) or 5 (fax). 1490 default: 1491 break; 1492 } 1493 // index > 2 are ignored in switch above 1494 hfp_connection->parser_item_index++; 1495 break; 1496 case HFP_CMD_LIST_CURRENT_CALLS: 1497 switch(hfp_connection->parser_item_index){ 1498 case 0: 1499 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1500 hfp_connection->clcc_idx = value; 1501 break; 1502 case 1: 1503 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1504 hfp_connection->clcc_dir = value; 1505 break; 1506 case 2: 1507 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1508 hfp_connection->clcc_status = value; 1509 break; 1510 case 3: 1511 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1512 hfp_connection->clcc_mode = value; 1513 break; 1514 case 4: 1515 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1516 hfp_connection->clcc_mpty = value; 1517 break; 1518 case 5: 1519 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1520 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1521 break; 1522 case 6: 1523 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1524 hfp_connection->bnip_type = value; 1525 break; 1526 default: 1527 break; 1528 } 1529 // index > 6 are ignored in switch above 1530 hfp_connection->parser_item_index++; 1531 break; 1532 case HFP_CMD_SET_MICROPHONE_GAIN: 1533 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1534 hfp_connection->microphone_gain = value; 1535 log_info("hfp parse HFP_CMD_SET_MICROPHONE_GAIN %d\n", value); 1536 break; 1537 case HFP_CMD_SET_SPEAKER_GAIN: 1538 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1539 hfp_connection->speaker_gain = value; 1540 log_info("hfp parse HFP_CMD_SET_SPEAKER_GAIN %d\n", value); 1541 break; 1542 case HFP_CMD_TURN_OFF_EC_AND_NR: 1543 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1544 hfp_connection->ag_echo_and_noise_reduction = value; 1545 log_info("hfp parse HFP_CMD_TURN_OFF_EC_AND_NR %d\n", value); 1546 break; 1547 case HFP_CMD_CHANGE_IN_BAND_RING_TONE_SETTING: 1548 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1549 hfp_connection->remote_supported_features = store_bit(hfp_connection->remote_supported_features, HFP_AGSF_IN_BAND_RING_TONE, value); 1550 log_info("hfp parse HFP_CHANGE_IN_BAND_RING_TONE_SETTING %d\n", value); 1551 break; 1552 case HFP_CMD_HF_CONFIRMED_CODEC: 1553 hfp_connection->codec_confirmed = btstack_atoi((char*)hfp_connection->line_buffer); 1554 log_info("hfp parse HFP_CMD_HF_CONFIRMED_CODEC %d\n", hfp_connection->codec_confirmed); 1555 break; 1556 case HFP_CMD_AG_SUGGESTED_CODEC: 1557 hfp_connection->suggested_codec = btstack_atoi((char*)hfp_connection->line_buffer); 1558 log_info("hfp parse HFP_CMD_AG_SUGGESTED_CODEC %d\n", hfp_connection->suggested_codec); 1559 break; 1560 case HFP_CMD_SUPPORTED_FEATURES: 1561 hfp_connection->remote_supported_features = btstack_atoi((char*)hfp_connection->line_buffer); 1562 log_info("Parsed supported feature %d\n", (int) hfp_connection->remote_supported_features); 1563 break; 1564 case HFP_CMD_AVAILABLE_CODECS: 1565 log_info("Parsed codec %s\n", hfp_connection->line_buffer); 1566 hfp_connection->remote_codecs[hfp_connection->parser_item_index] = (uint16_t)btstack_atoi((char*)hfp_connection->line_buffer); 1567 hfp_next_codec_index(hfp_connection); 1568 hfp_connection->remote_codecs_nr = hfp_connection->parser_item_index; 1569 break; 1570 case HFP_CMD_RETRIEVE_AG_INDICATORS: 1571 strncpy((char *)hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, (char *)hfp_connection->line_buffer, HFP_MAX_INDICATOR_DESC_SIZE); 1572 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name[HFP_MAX_INDICATOR_DESC_SIZE-1] = 0; 1573 hfp_connection->ag_indicators[hfp_connection->parser_item_index].index = hfp_connection->parser_item_index+1; 1574 log_info("Indicator %d: %s (", hfp_connection->ag_indicators_nr+1, hfp_connection->line_buffer); 1575 break; 1576 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 1577 log_info("Parsed Indicator %d with status: %s\n", hfp_connection->parser_item_index+1, hfp_connection->line_buffer); 1578 hfp_connection->ag_indicators[hfp_connection->parser_item_index].status = btstack_atoi((char *) hfp_connection->line_buffer); 1579 hfp_next_indicators_index(hfp_connection); 1580 break; 1581 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1582 hfp_next_indicators_index(hfp_connection); 1583 if (hfp_connection->parser_item_index != 4) break; 1584 log_info("Parsed Enable indicators: %s\n", hfp_connection->line_buffer); 1585 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1586 hfp_connection->enable_status_update_for_ag_indicators = (uint8_t) value; 1587 break; 1588 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 1589 log_info("Parsed Support call hold: %s\n", hfp_connection->line_buffer); 1590 if (hfp_connection->line_size > 2 ) break; 1591 memcpy((char *)hfp_connection->remote_call_services[hfp_connection->remote_call_services_index].name, (char *)hfp_connection->line_buffer, HFP_CALL_SERVICE_SIZE-1); 1592 hfp_connection->remote_call_services[hfp_connection->remote_call_services_index].name[HFP_CALL_SERVICE_SIZE - 1] = 0; 1593 hfp_next_remote_call_services_index(hfp_connection); 1594 break; 1595 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 1596 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 1597 log_info("Parsed Generic status indicator: %s\n", hfp_connection->line_buffer); 1598 hfp_connection->generic_status_indicators[hfp_connection->parser_item_index].uuid = (uint16_t)btstack_atoi((char*)hfp_connection->line_buffer); 1599 hfp_next_indicators_index(hfp_connection); 1600 hfp_connection->generic_status_indicators_nr = hfp_connection->parser_item_index; 1601 break; 1602 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 1603 // HF parses inital AG gen. ind. state 1604 log_info("Parsed List generic status indicator %s state: ", hfp_connection->line_buffer); 1605 hfp_connection->parser_item_index = hfp_parse_indicator_index(hfp_connection); 1606 break; 1607 case HFP_CMD_HF_INDICATOR_STATUS: 1608 hfp_connection->parser_indicator_index = hfp_parse_indicator_index(hfp_connection); 1609 log_info("Parsed HF indicator index %u", hfp_connection->parser_indicator_index); 1610 break; 1611 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1612 // AG parses new gen. ind. state 1613 if (hfp_connection->ignore_value){ 1614 hfp_connection->ignore_value = 0; 1615 log_info("Parsed Enable AG indicator pos %u('%s') - unchanged (stays %u)\n", hfp_connection->parser_item_index, 1616 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, hfp_connection->ag_indicators[hfp_connection->parser_item_index].enabled); 1617 } 1618 else if (hfp_connection->ag_indicators[hfp_connection->parser_item_index].mandatory){ 1619 log_info("Parsed Enable AG indicator pos %u('%s') - ignore (mandatory)\n", 1620 hfp_connection->parser_item_index, hfp_connection->ag_indicators[hfp_connection->parser_item_index].name); 1621 } else { 1622 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1623 hfp_connection->ag_indicators[hfp_connection->parser_item_index].enabled = value; 1624 log_info("Parsed Enable AG indicator pos %u('%s'): %u\n", hfp_connection->parser_item_index, 1625 hfp_connection->ag_indicators[hfp_connection->parser_item_index].name, value); 1626 } 1627 hfp_next_indicators_index(hfp_connection); 1628 break; 1629 case HFP_CMD_TRANSFER_AG_INDICATOR_STATUS: 1630 // indicators are indexed starting with 1 1631 hfp_connection->parser_item_index = hfp_parse_indicator_index(hfp_connection); 1632 log_info("Parsed status of the AG indicator %d, status ", hfp_connection->parser_item_index); 1633 break; 1634 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1635 hfp_connection->network_operator.mode = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1636 log_info("Parsed network operator mode: %d, ", hfp_connection->network_operator.mode); 1637 break; 1638 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1639 if (hfp_connection->line_buffer[0] == '3'){ 1640 log_info("Parsed Set network operator format : %s, ", hfp_connection->line_buffer); 1641 break; 1642 } 1643 // TODO emit ERROR, wrong format 1644 log_info("ERROR Set network operator format: index %s not supported\n", hfp_connection->line_buffer); 1645 break; 1646 case HFP_CMD_ERROR: 1647 break; 1648 case HFP_CMD_EXTENDED_AUDIO_GATEWAY_ERROR: 1649 hfp_connection->extended_audio_gateway_error = 1; 1650 hfp_connection->extended_audio_gateway_error_value = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1651 break; 1652 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1653 hfp_connection->enable_extended_audio_gateway_error_report = (uint8_t)btstack_atoi((char*)hfp_connection->line_buffer); 1654 hfp_connection->ok_pending = 1; 1655 hfp_connection->extended_audio_gateway_error = 0; 1656 break; 1657 case HFP_CMD_AG_SENT_PHONE_NUMBER: 1658 case HFP_CMD_AG_SENT_CALL_WAITING_NOTIFICATION_UPDATE: 1659 case HFP_CMD_AG_SENT_CLIP_INFORMATION: 1660 strncpy(hfp_connection->bnip_number, (char *)hfp_connection->line_buffer, sizeof(hfp_connection->bnip_number)); 1661 hfp_connection->bnip_number[sizeof(hfp_connection->bnip_number)-1] = 0; 1662 break; 1663 case HFP_CMD_CALL_HOLD: 1664 hfp_connection->ag_call_hold_action = hfp_connection->line_buffer[0] - '0'; 1665 if (hfp_connection->line_buffer[1] != '\0'){ 1666 hfp_connection->call_index = btstack_atoi((char *)&hfp_connection->line_buffer[1]); 1667 } 1668 break; 1669 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 1670 hfp_connection->ag_response_and_hold_action = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1671 break; 1672 case HFP_CMD_TRANSMIT_DTMF_CODES: 1673 hfp_connection->ag_dtmf_code = hfp_connection->line_buffer[0]; 1674 break; 1675 case HFP_CMD_ENABLE_CLIP: 1676 hfp_connection->clip_enabled = hfp_connection->line_buffer[0] != '0'; 1677 break; 1678 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 1679 hfp_connection->call_waiting_notification_enabled = hfp_connection->line_buffer[0] != '0'; 1680 break; 1681 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 1682 value = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1683 hfp_connection->ag_activate_voice_recognition_value = value; 1684 break; 1685 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 1686 switch(hfp_connection->parser_item_index){ 1687 case 0: 1688 hfp_connection->ag_vra_status = btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1689 break; 1690 case 1: 1691 hfp_connection->ag_vra_state = (hfp_voice_recognition_state_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1692 break; 1693 case 2: 1694 hfp_connection->ag_msg.text_id = 0; 1695 for (i = 0 ; i < 4; i++){ 1696 hfp_connection->ag_msg.text_id = (hfp_connection->ag_msg.text_id << 4) | nibble_for_char(hfp_connection->line_buffer[i]); 1697 } 1698 break; 1699 case 3: 1700 hfp_connection->ag_msg.text_operation = (hfp_text_operation_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1701 break; 1702 case 4: 1703 hfp_connection->ag_msg.text_type = (hfp_text_type_t) btstack_atoi((char *)&hfp_connection->line_buffer[0]); 1704 break; 1705 case 5: 1706 hfp_connection->line_buffer[hfp_connection->line_size] = 0; 1707 hfp_connection->ag_vra_msg_length = hfp_connection->line_size + 1; 1708 log_info("VRA message of length %d", hfp_connection->ag_vra_msg_length); 1709 break; 1710 default: 1711 break; 1712 } 1713 hfp_connection->parser_item_index++; 1714 break; 1715 default: 1716 break; 1717 } 1718 } 1719 1720 static void hfp_handle_start_sdp_client_query(void * context){ 1721 UNUSED(context); 1722 1723 btstack_linked_list_iterator_t it; 1724 btstack_linked_list_iterator_init(&it, &hfp_connections); 1725 while (btstack_linked_list_iterator_has_next(&it)){ 1726 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1727 1728 if (connection->state != HFP_W2_SEND_SDP_QUERY) continue; 1729 1730 connection->state = HFP_W4_SDP_QUERY_COMPLETE; 1731 hfp_sdp_query_context.local_role = connection->local_role; 1732 (void)memcpy(hfp_sdp_query_context.remote_address, connection->remote_addr, 6); 1733 sdp_client_query_rfcomm_channel_and_name_for_service_class_uuid(&handle_query_rfcomm_event, connection->remote_addr, connection->service_uuid); 1734 return; 1735 } 1736 } 1737 1738 uint8_t hfp_establish_service_level_connection(bd_addr_t bd_addr, uint16_t service_uuid, hfp_role_t local_role){ 1739 hfp_connection_t * connection = get_hfp_connection_context_for_bd_addr(bd_addr, local_role); 1740 if (connection){ 1741 return ERROR_CODE_COMMAND_DISALLOWED; 1742 } 1743 1744 connection = hfp_create_connection(bd_addr, local_role); 1745 if (!connection){ 1746 return BTSTACK_MEMORY_ALLOC_FAILED; 1747 } 1748 1749 connection->state = HFP_W2_SEND_SDP_QUERY; 1750 1751 bd_addr_copy(connection->remote_addr, bd_addr); 1752 connection->service_uuid = service_uuid; 1753 1754 hfp_sdp_query_request.callback = &hfp_handle_start_sdp_client_query; 1755 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1756 (void) sdp_client_register_query_callback(&hfp_sdp_query_request); 1757 return ERROR_CODE_SUCCESS; 1758 } 1759 1760 void hfp_trigger_release_service_level_connection(hfp_connection_t * hfp_connection){ 1761 // called internally, NULL check already performed 1762 btstack_assert(hfp_connection != NULL); 1763 1764 hfp_trigger_release_audio_connection(hfp_connection); 1765 if (hfp_connection->state < HFP_W4_RFCOMM_CONNECTED){ 1766 hfp_connection->state = HFP_IDLE; 1767 return; 1768 } 1769 1770 if (hfp_connection->state == HFP_W4_RFCOMM_CONNECTED){ 1771 hfp_connection->state = HFP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 1772 return; 1773 } 1774 hfp_connection->release_slc_connection = 1; 1775 if (hfp_connection->state < HFP_W4_SCO_CONNECTED){ 1776 hfp_connection->state = HFP_W2_DISCONNECT_RFCOMM; 1777 return; 1778 } 1779 1780 if (hfp_connection->state < HFP_W4_SCO_DISCONNECTED){ 1781 hfp_connection->state = HFP_W2_DISCONNECT_SCO; 1782 hfp_connection->release_audio_connection = 1; 1783 return; 1784 } 1785 } 1786 1787 uint8_t hfp_trigger_release_audio_connection(hfp_connection_t * hfp_connection){ 1788 // called internally, NULL check already performed 1789 btstack_assert(hfp_connection != NULL); 1790 if (hfp_connection->state <= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 1791 return ERROR_CODE_COMMAND_DISALLOWED; 1792 } 1793 switch (hfp_connection->state) { 1794 case HFP_W2_CONNECT_SCO: 1795 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 1796 break; 1797 case HFP_W4_SCO_CONNECTED: 1798 case HFP_AUDIO_CONNECTION_ESTABLISHED: 1799 hfp_connection->release_audio_connection = 1; 1800 break; 1801 default: 1802 return ERROR_CODE_COMMAND_DISALLOWED; 1803 } 1804 return ERROR_CODE_SUCCESS; 1805 } 1806 1807 static const struct link_settings { 1808 const uint16_t max_latency; 1809 const uint8_t retransmission_effort; 1810 const uint16_t packet_types; 1811 const bool eSCO; 1812 const uint8_t codec; 1813 } hfp_link_settings [] = { 1814 { 0xffff, 0xff, SCO_PACKET_TYPES_HV1, false, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_D0 1815 { 0xffff, 0xff, SCO_PACKET_TYPES_HV3, false, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_D1 1816 { 0x0007, 0x01, SCO_PACKET_TYPES_EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S1 1817 { 0x0007, 0x01, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S2 1818 { 0x000a, 0x01, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S3 1819 { 0x000c, 0x02, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_CVSD }, // HFP_LINK_SETTINGS_S4 1820 { 0x0008, 0x02, SCO_PACKET_TYPES_EV3, true, HFP_CODEC_MSBC }, // HFP_LINK_SETTINGS_T1 1821 { 0x000d, 0x02, SCO_PACKET_TYPES_2EV3, true, HFP_CODEC_MSBC } // HFP_LINK_SETTINGS_T2 1822 }; 1823 1824 void hfp_setup_synchronous_connection(hfp_connection_t * hfp_connection){ 1825 // all packet types, fixed bandwidth 1826 int setting = hfp_connection->link_setting; 1827 log_info("hfp_setup_synchronous_connection using setting nr %u", setting); 1828 hfp_sco_establishment_active = hfp_connection; 1829 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 1830 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1831 #ifdef ENABLE_BCM_PCM_WBS 1832 sco_voice_setting = 0x0063; // Transparent data, 16-bit for BCM controllers 1833 #else 1834 sco_voice_setting = 0x0043; // Transparent data, 8-bit otherwise 1835 #endif 1836 } 1837 // get packet types - bits 6-9 are 'don't allow' 1838 uint16_t packet_types = hfp_link_settings[setting].packet_types ^ 0x03c0; 1839 hci_send_cmd(&hci_setup_synchronous_connection, hfp_connection->acl_handle, 8000, 8000, hfp_link_settings[setting].max_latency, 1840 sco_voice_setting, hfp_link_settings[setting].retransmission_effort, packet_types); 1841 } 1842 1843 void hfp_accept_synchronous_connection(hfp_connection_t * hfp_connection, bool incoming_eSCO){ 1844 1845 // remote supported feature eSCO is set if link type is eSCO 1846 // eSCO: S4 - max latency == transmission interval = 0x000c == 12 ms, 1847 uint16_t max_latency; 1848 uint8_t retransmission_effort; 1849 uint16_t packet_types; 1850 1851 if (incoming_eSCO && hci_extended_sco_link_supported() && hci_remote_esco_supported(hfp_connection->acl_handle)){ 1852 max_latency = 0x000c; 1853 retransmission_effort = 0x02; 1854 // eSCO: EV3 and 2-EV3 1855 packet_types = 0x0048; 1856 } else { 1857 max_latency = 0xffff; 1858 retransmission_effort = 0xff; 1859 // sco: HV1 and HV3 1860 packet_types = 0x005; 1861 } 1862 1863 // mSBC only allows for transparent data 1864 uint16_t sco_voice_setting = hci_get_sco_voice_setting(); 1865 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1866 #ifdef ENABLE_BCM_PCM_WBS 1867 sco_voice_setting = 0x0063; // Transparent data, 16-bit for BCM controllers 1868 #else 1869 sco_voice_setting = 0x0043; // Transparent data, 8-bit otherwise 1870 #endif 1871 } 1872 1873 // filter packet types 1874 packet_types &= hfp_get_sco_packet_types(); 1875 1876 // bits 6-9 are 'don't allow' 1877 packet_types ^= 0x3c0; 1878 1879 log_info("HFP: sending hci_accept_connection_request, packet types 0x%04x, sco_voice_setting 0x%02x", packet_types, sco_voice_setting); 1880 hci_send_cmd(&hci_accept_synchronous_connection, hfp_connection->remote_addr, 8000, 8000, max_latency, 1881 sco_voice_setting, retransmission_effort, packet_types); 1882 } 1883 1884 #ifdef ENABLE_CC256X_ASSISTED_HFP 1885 void hfp_cc256x_prepare_for_sco(hfp_connection_t * hfp_connection){ 1886 hfp_connection->cc256x_send_write_codec_config = true; 1887 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1888 hfp_connection->cc256x_send_wbs_associate = true; 1889 } 1890 } 1891 1892 void hfp_cc256x_write_codec_config(hfp_connection_t * hfp_connection){ 1893 uint32_t sample_rate_hz; 1894 uint16_t clock_rate_khz; 1895 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1896 clock_rate_khz = 512; 1897 sample_rate_hz = 16000; 1898 } else { 1899 clock_rate_khz = 256; 1900 sample_rate_hz = 8000; 1901 } 1902 uint8_t clock_direction = 0; // master 1903 uint16_t frame_sync_duty_cycle = 0; // i2s with 50% 1904 uint8_t frame_sync_edge = 1; // rising edge 1905 uint8_t frame_sync_polarity = 0; // active high 1906 uint8_t reserved = 0; 1907 uint16_t size = 16; 1908 uint16_t chan_1_offset = 1; 1909 uint16_t chan_2_offset = chan_1_offset + size; 1910 uint8_t out_edge = 1; // rising 1911 uint8_t in_edge = 0; // falling 1912 hci_send_cmd(&hci_ti_write_codec_config, clock_rate_khz, clock_direction, sample_rate_hz, frame_sync_duty_cycle, 1913 frame_sync_edge, frame_sync_polarity, reserved, 1914 size, chan_1_offset, out_edge, size, chan_1_offset, in_edge, reserved, 1915 size, chan_2_offset, out_edge, size, chan_2_offset, in_edge, reserved); 1916 } 1917 #endif 1918 1919 #ifdef ENABLE_BCM_PCM_WBS 1920 void hfp_bcm_prepare_for_sco(hfp_connection_t * hfp_connection){ 1921 hfp_connection->bcm_send_write_i2spcm_interface_param = true; 1922 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 1923 hfp_connection->bcm_send_enable_wbs = true; 1924 } 1925 } 1926 void hfp_bcm_write_i2spcm_interface_param(hfp_connection_t * hfp_connection){ 1927 uint8_t sample_rate = (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? 1 : 0; 1928 // i2s enable, master, 8/16 kHz, 512 kHz 1929 hci_send_cmd(&hci_bcm_write_i2spcm_interface_paramhci_bcm_write_i2spcm_interface_param, 1, 1, sample_rate, 2); 1930 } 1931 #endif 1932 1933 void hfp_set_hf_callback(btstack_packet_handler_t callback){ 1934 hfp_hf_callback = callback; 1935 } 1936 1937 void hfp_set_ag_callback(btstack_packet_handler_t callback){ 1938 hfp_ag_callback = callback; 1939 } 1940 1941 void hfp_set_ag_rfcomm_packet_handler(btstack_packet_handler_t handler){ 1942 hfp_ag_rfcomm_packet_handler = handler; 1943 } 1944 1945 void hfp_set_hf_rfcomm_packet_handler(btstack_packet_handler_t handler){ 1946 hfp_hf_rfcomm_packet_handler = handler; 1947 } 1948 1949 void hfp_init(void){ 1950 hfp_allowed_sco_packet_types = SCO_PACKET_TYPES_ALL; 1951 } 1952 1953 void hfp_deinit(void){ 1954 hfp_allowed_sco_packet_types = 0; 1955 hfp_connections = NULL; 1956 hfp_hf_callback = NULL; 1957 hfp_ag_callback = NULL; 1958 hfp_hf_rfcomm_packet_handler = NULL; 1959 hfp_ag_rfcomm_packet_handler = NULL; 1960 hfp_sco_establishment_active = NULL; 1961 (void) memset(&hfp_sdp_query_context, 0, sizeof(hfp_sdp_query_context_t)); 1962 (void) memset(&hfp_sdp_query_request, 0, sizeof(btstack_context_callback_registration_t)); 1963 } 1964 1965 void hfp_set_sco_packet_types(uint16_t packet_types){ 1966 hfp_allowed_sco_packet_types = packet_types; 1967 } 1968 1969 uint16_t hfp_get_sco_packet_types(void){ 1970 return hfp_allowed_sco_packet_types; 1971 } 1972 1973 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){ 1974 int8_t setting = (int8_t) current_setting; 1975 bool can_use_eSCO = local_eSCO_supported && remote_eSCO_supported; 1976 while (setting > 0){ 1977 setting--; 1978 // skip if eSCO required but not available 1979 if (hfp_link_settings[setting].eSCO && !can_use_eSCO) continue; 1980 // skip if S4 but not supported 1981 if ((setting == (int8_t) HFP_LINK_SETTINGS_S4) && !eSCO_S4_supported) continue; 1982 // skip wrong codec 1983 if ( hfp_link_settings[setting].codec != negotiated_codec) continue; 1984 // skip disabled packet types 1985 uint16_t required_packet_types = hfp_link_settings[setting].packet_types; 1986 uint16_t allowed_packet_types = hfp_allowed_sco_packet_types; 1987 if ((required_packet_types & allowed_packet_types) == 0) continue; 1988 1989 // found matching setting 1990 return (hfp_link_settings_t) setting; 1991 } 1992 return HFP_LINK_SETTINGS_NONE; 1993 } 1994 1995 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){ 1996 bool local_eSCO_supported = hci_extended_sco_link_supported(); 1997 bool remote_eSCO_supported = hci_remote_esco_supported(hfp_connection->acl_handle); 1998 uint8_t negotiated_codec = hfp_connection->negotiated_codec; 1999 return hfp_next_link_setting(current_setting, local_eSCO_supported, remote_eSCO_supported, eSCO_S4_supported, negotiated_codec); 2000 } 2001 2002 void hfp_init_link_settings(hfp_connection_t * hfp_connection, uint8_t eSCO_S4_supported){ 2003 // get highest possible link setting 2004 hfp_connection->link_setting = hfp_next_link_setting_for_connection(HFP_LINK_SETTINGS_NONE, hfp_connection, eSCO_S4_supported); 2005 log_info("hfp_init_link_settings: %u", hfp_connection->link_setting); 2006 } 2007 2008 #define HFP_HF_RX_DEBUG_PRINT_LINE 80 2009 2010 void hfp_log_rfcomm_message(const char * tag, uint8_t * packet, uint16_t size){ 2011 #ifdef ENABLE_LOG_INFO 2012 // encode \n\r 2013 char printable[HFP_HF_RX_DEBUG_PRINT_LINE+2]; 2014 int i = 0; 2015 int pos; 2016 for (pos=0 ; (pos < size) && (i < (HFP_HF_RX_DEBUG_PRINT_LINE - 3)) ; pos++){ 2017 switch (packet[pos]){ 2018 case '\n': 2019 printable[i++] = '\\'; 2020 printable[i++] = 'n'; 2021 break; 2022 case '\r': 2023 printable[i++] = '\\'; 2024 printable[i++] = 'r'; 2025 break; 2026 default: 2027 printable[i++] = packet[pos]; 2028 break; 2029 } 2030 } 2031 printable[i] = 0; 2032 log_info("%s: '%s'", tag, printable); 2033 #endif 2034 } 2035