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