1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hfp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HFP Audio Gateway (AG) unit 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "hci_cmd.h" 53 #include "btstack_run_loop.h" 54 55 #include "bluetooth_sdp.h" 56 #include "hci.h" 57 #include "btstack_memory.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 #include "btstack_debug.h" 61 #include "btstack_event.h" 62 #include "classic/core.h" 63 #include "classic/hfp.h" 64 #include "classic/hfp_ag.h" 65 #include "classic/hfp_gsm_model.h" 66 #include "classic/sdp_client_rfcomm.h" 67 #include "classic/sdp_server.h" 68 #include "classic/sdp_util.h" 69 70 // private prototypes 71 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection); 72 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection); 73 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection); 74 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection); 75 76 // public prototypes 77 hfp_generic_status_indicator_t * get_hfp_generic_status_indicators(void); 78 int get_hfp_generic_status_indicators_nr(void); 79 void set_hfp_generic_status_indicators(hfp_generic_status_indicator_t * indicators, int indicator_nr); 80 void set_hfp_ag_indicators(hfp_ag_indicator_t * indicators, int indicator_nr); 81 int get_hfp_ag_indicators_nr(hfp_connection_t * context); 82 hfp_ag_indicator_t * get_hfp_ag_indicators(hfp_connection_t * context); 83 84 #define HFP_SUBEVENT_INVALID 0xFFFF 85 86 // const 87 static const char hfp_ag_default_service_name[] = "Voice gateway"; 88 89 // globals 90 91 // higher layer callbacks 92 static btstack_packet_handler_t hfp_ag_callback; 93 94 static bool (*hfp_ag_custom_call_sm_handler)(hfp_ag_call_event_t event); 95 96 static btstack_packet_callback_registration_t hfp_ag_hci_event_callback_registration; 97 98 static uint16_t hfp_ag_supported_features; 99 100 // codecs 101 static uint8_t hfp_ag_codecs_nr; 102 static uint8_t hfp_ag_codecs[HFP_MAX_NUM_CODECS]; 103 104 // AG indicators 105 static int hfp_ag_indicators_nr; 106 static hfp_ag_indicator_t hfp_ag_indicators[HFP_MAX_NUM_INDICATORS]; 107 108 // generic status indicators 109 static int hfp_ag_generic_status_indicators_nr; 110 static hfp_generic_status_indicator_t hfp_ag_generic_status_indicators[HFP_MAX_NUM_INDICATORS]; 111 112 static int hfp_ag_call_hold_services_nr; 113 static char * hfp_ag_call_hold_services[6]; 114 115 static hfp_response_and_hold_state_t hfp_ag_response_and_hold_state; 116 static bool hfp_ag_response_and_hold_active = false; 117 118 // Subscriber information entries 119 static hfp_phone_number_t * hfp_ag_subscriber_numbers; 120 static int hfp_ag_subscriber_numbers_count; 121 122 // call state 123 static btstack_timer_source_t hfp_ag_ring_timeout; 124 125 // code 126 static int hfp_ag_get_ag_indicators_nr(hfp_connection_t * hfp_connection){ 127 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 128 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 129 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 130 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 131 } 132 return hfp_connection->ag_indicators_nr; 133 } 134 135 hfp_ag_indicator_t * hfp_ag_get_ag_indicators(hfp_connection_t * hfp_connection){ 136 // TODO: save only value, and value changed in the hfp_connection? 137 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 138 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 139 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 140 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 141 } 142 return (hfp_ag_indicator_t *)&(hfp_connection->ag_indicators); 143 } 144 145 static hfp_ag_indicator_t * get_ag_indicator_for_name(const char * name){ 146 int i; 147 for (i = 0; i < hfp_ag_indicators_nr; i++){ 148 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 149 return &hfp_ag_indicators[i]; 150 } 151 } 152 return NULL; 153 } 154 155 static int get_ag_indicator_index_for_name(const char * name){ 156 int i; 157 for (i = 0; i < hfp_ag_indicators_nr; i++){ 158 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 159 return i; 160 } 161 } 162 return -1; 163 } 164 165 static hfp_connection_t * get_hfp_ag_connection_context_for_acl_handle(uint16_t handle){ 166 btstack_linked_list_iterator_t it; 167 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 168 while (btstack_linked_list_iterator_has_next(&it)){ 169 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 170 if (hfp_connection->acl_handle != handle) continue; 171 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 172 return hfp_connection; 173 } 174 return NULL; 175 } 176 177 static int use_in_band_tone(void){ 178 return get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE); 179 } 180 181 static int has_codec_negotiation_feature(hfp_connection_t * hfp_connection){ 182 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_CODEC_NEGOTIATION); 183 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_CODEC_NEGOTIATION); 184 return hf && ag; 185 } 186 187 static int has_call_waiting_and_3way_calling_feature(hfp_connection_t * hfp_connection){ 188 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_THREE_WAY_CALLING); 189 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_THREE_WAY_CALLING); 190 return hf && ag; 191 } 192 193 static int has_hf_indicators_feature(hfp_connection_t * hfp_connection){ 194 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_HF_INDICATORS); 195 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_HF_INDICATORS); 196 return hf && ag; 197 } 198 199 /* unsolicited responses */ 200 201 static int hfp_ag_send_change_in_band_ring_tone_setting_cmd(uint16_t cid){ 202 char buffer[20]; 203 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", 204 HFP_CHANGE_IN_BAND_RING_TONE_SETTING, use_in_band_tone()); 205 buffer[sizeof(buffer) - 1] = 0; 206 return send_str_over_rfcomm(cid, buffer); 207 } 208 209 static int hfp_ag_exchange_supported_features_cmd(uint16_t cid){ 210 char buffer[40]; 211 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n\r\nOK\r\n", 212 HFP_SUPPORTED_FEATURES, hfp_ag_supported_features); 213 buffer[sizeof(buffer) - 1] = 0; 214 return send_str_over_rfcomm(cid, buffer); 215 } 216 217 static int hfp_ag_send_ok(uint16_t cid){ 218 char buffer[10]; 219 snprintf(buffer, sizeof(buffer), "\r\nOK\r\n"); 220 buffer[sizeof(buffer) - 1] = 0; 221 return send_str_over_rfcomm(cid, buffer); 222 } 223 224 static int hfp_ag_send_ring(uint16_t cid){ 225 return send_str_over_rfcomm(cid, (char *) "\r\nRING\r\n"); 226 } 227 228 static int hfp_ag_send_no_carrier(uint16_t cid){ 229 char buffer[15]; 230 snprintf(buffer, sizeof(buffer), "\r\nNO CARRIER\r\n"); 231 buffer[sizeof(buffer) - 1] = 0; 232 return send_str_over_rfcomm(cid, buffer); 233 } 234 235 static int hfp_ag_send_clip(uint16_t cid){ 236 char buffer[50]; 237 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", HFP_ENABLE_CLIP, 238 hfp_gsm_clip_number(), hfp_gsm_clip_type()); 239 buffer[sizeof(buffer) - 1] = 0; 240 return send_str_over_rfcomm(cid, buffer); 241 } 242 243 static int hfp_send_subscriber_number_cmd(uint16_t cid, uint8_t type, const char * number){ 244 char buffer[50]; 245 snprintf(buffer, sizeof(buffer), "\r\n%s: ,\"%s\",%u, , \r\n", 246 HFP_SUBSCRIBER_NUMBER_INFORMATION, number, type); 247 buffer[sizeof(buffer) - 1] = 0; 248 return send_str_over_rfcomm(cid, buffer); 249 } 250 251 static int hfp_ag_send_phone_number_for_voice_tag_cmd(uint16_t cid){ 252 char buffer[50]; 253 snprintf(buffer, sizeof(buffer), "\r\n%s: %s\r\n", 254 HFP_PHONE_NUMBER_FOR_VOICE_TAG, hfp_gsm_clip_number()); 255 buffer[sizeof(buffer) - 1] = 0; 256 return send_str_over_rfcomm(cid, buffer); 257 } 258 259 static int hfp_ag_send_call_waiting_notification(uint16_t cid){ 260 char buffer[50]; 261 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", 262 HFP_ENABLE_CALL_WAITING_NOTIFICATION, hfp_gsm_clip_number(), 263 hfp_gsm_clip_type()); 264 buffer[sizeof(buffer) - 1] = 0; 265 return send_str_over_rfcomm(cid, buffer); 266 } 267 268 static int hfp_ag_send_error(uint16_t cid){ 269 char buffer[10]; 270 snprintf(buffer, sizeof(buffer), "\r\nERROR\r\n"); 271 buffer[sizeof(buffer) - 1] = 0; 272 return send_str_over_rfcomm(cid, buffer); 273 } 274 275 static int hfp_ag_send_report_extended_audio_gateway_error(uint16_t cid, uint8_t error){ 276 char buffer[20]; 277 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 278 HFP_EXTENDED_AUDIO_GATEWAY_ERROR, error); 279 buffer[sizeof(buffer) - 1] = 0; 280 return send_str_over_rfcomm(cid, buffer); 281 } 282 283 // get size for indicator string 284 static int hfp_ag_indicators_string_size(hfp_connection_t * hfp_connection, int i){ 285 // template: ("$NAME",($MIN,$MAX)) 286 return 8 + (int) strlen(hfp_ag_get_ag_indicators(hfp_connection)[i].name) 287 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range) 288 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range); 289 } 290 291 // store indicator 292 static void hfp_ag_indicators_string_store(hfp_connection_t * hfp_connection, int i, uint8_t * buffer, uint16_t buffer_size){ 293 snprintf((char *)buffer, buffer_size, "(\"%s\",(%d,%d)),", 294 hfp_ag_get_ag_indicators(hfp_connection)[i].name, 295 hfp_ag_get_ag_indicators(hfp_connection)[i].min_range, 296 hfp_ag_get_ag_indicators(hfp_connection)[i].max_range); 297 ((char *)buffer)[buffer_size - 1] = 0; 298 } 299 300 // structure: header [indicator [comma indicator]] footer 301 static int hfp_ag_indicators_cmd_generator_num_segments(hfp_connection_t * hfp_connection){ 302 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 303 if (!num_indicators) return 2; 304 return 3 + ((num_indicators-1) * 2); 305 } 306 307 // get size of individual segment for hfp_ag_retrieve_indicators_cmd 308 static int hfp_ag_indicators_cmd_generator_get_segment_len(hfp_connection_t * hfp_connection, int index){ 309 if (index == 0) { 310 return (uint16_t) strlen(HFP_INDICATOR) + 3; // "\n\r%s:"" 311 } 312 index--; 313 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 314 int indicator_index = index >> 1; 315 if ((index & 1) == 0){ 316 return hfp_ag_indicators_string_size(hfp_connection, indicator_index); 317 } 318 if (indicator_index == (num_indicators - 1)){ 319 return 8; // "\r\n\r\nOK\r\n" 320 } 321 return 1; // comma 322 } 323 324 static void hfp_ag_indicators_cmd_generator_store_segment(hfp_connection_t * hfp_connection, int index, uint8_t * buffer, uint16_t buffer_size){ 325 if (index == 0){ 326 *buffer++ = '\r'; 327 *buffer++ = '\n'; 328 int len = (uint16_t) strlen(HFP_INDICATOR); 329 (void)memcpy(buffer, HFP_INDICATOR, len); 330 buffer += len; 331 *buffer++ = ':'; 332 return; 333 } 334 index--; 335 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 336 int indicator_index = index >> 1; 337 if ((index & 1) == 0){ 338 hfp_ag_indicators_string_store(hfp_connection, indicator_index, buffer, buffer_size); 339 return; 340 } 341 if (indicator_index == (num_indicators-1)){ 342 (void)memcpy(buffer, "\r\n\r\nOK\r\n", 8); 343 return; 344 } 345 *buffer = ','; 346 } 347 348 static int hfp_ag_generic_indicators_join(char * buffer, int buffer_size){ 349 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 350 int i; 351 int offset = 0; 352 for (i = 0; i < (hfp_ag_generic_status_indicators_nr - 1); i++) { 353 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_generic_status_indicators[i].uuid); 354 } 355 if (i < hfp_ag_generic_status_indicators_nr){ 356 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_generic_status_indicators[i].uuid); 357 } 358 return offset; 359 } 360 361 static int hfp_ag_generic_indicators_initial_status_join(char * buffer, int buffer_size){ 362 if (buffer_size < (hfp_ag_generic_status_indicators_nr * 3)) return 0; 363 int i; 364 int offset = 0; 365 for (i = 0; i < hfp_ag_generic_status_indicators_nr; i++) { 366 offset += snprintf(buffer+offset, buffer_size-offset, "\r\n%s:%d,%d\r\n", HFP_GENERIC_STATUS_INDICATOR, hfp_ag_generic_status_indicators[i].uuid, hfp_ag_generic_status_indicators[i].state); 367 } 368 return offset; 369 } 370 371 static int hfp_ag_indicators_status_join(char * buffer, int buffer_size){ 372 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 373 int i; 374 int offset = 0; 375 for (i = 0; i < (hfp_ag_indicators_nr-1); i++) { 376 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_indicators[i].status); 377 } 378 if (i<hfp_ag_indicators_nr){ 379 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_indicators[i].status); 380 } 381 return offset; 382 } 383 384 static int hfp_ag_call_services_join(char * buffer, int buffer_size){ 385 if (buffer_size < (hfp_ag_call_hold_services_nr * 3)) return 0; 386 int i; 387 int offset = snprintf(buffer, buffer_size, "("); 388 for (i = 0; i < (hfp_ag_call_hold_services_nr-1); i++) { 389 offset += snprintf(buffer+offset, buffer_size-offset, "%s,", hfp_ag_call_hold_services[i]); 390 } 391 if (i<hfp_ag_call_hold_services_nr){ 392 offset += snprintf(buffer+offset, buffer_size-offset, "%s)", hfp_ag_call_hold_services[i]); 393 } 394 return offset; 395 } 396 397 static int hfp_ag_send_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, 398 int start_segment, int num_segments, 399 int (*get_segment_len)(hfp_connection_t * hfp_connection, int segment), 400 void (*store_segment) (hfp_connection_t * hfp_connection, int segment, uint8_t * buffer, uint16_t buffer_size)){ 401 402 // assumes: can send now == true 403 // assumes: num segments > 0 404 // assumes: individual segments are smaller than MTU 405 rfcomm_reserve_packet_buffer(); 406 int mtu = rfcomm_get_max_frame_size(cid); 407 uint8_t * data = rfcomm_get_outgoing_buffer(); 408 int offset = 0; 409 int segment = start_segment; 410 while (segment < num_segments){ 411 int segment_len = get_segment_len(hfp_connection, segment); 412 if ((offset + segment_len + 1) > mtu) break; 413 // append segment. As it appends a '\0', we provide a buffer one byte larger 414 store_segment(hfp_connection, segment, data+offset, segment_len + 1); 415 offset += segment_len; 416 segment++; 417 } 418 rfcomm_send_prepared(cid, offset); 419 #ifdef ENABLE_HFP_AT_MESSAGES 420 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_SENT, (char *) data); 421 #endif 422 return segment; 423 } 424 425 // returns next segment to store 426 static int hfp_ag_send_retrieve_indicators_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, int start_segment){ 427 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 428 return hfp_ag_send_cmd_via_generator(cid, hfp_connection, start_segment, num_segments, 429 hfp_ag_indicators_cmd_generator_get_segment_len, 430 hfp_ag_indicators_cmd_generator_store_segment); 431 } 432 433 static int hfp_ag_send_retrieve_indicators_status_cmd(uint16_t cid){ 434 char buffer[40]; 435 const int size = sizeof(buffer); 436 int offset = snprintf(buffer, size, "\r\n%s:", HFP_INDICATOR); 437 offset += hfp_ag_indicators_status_join(buffer+offset, size-offset-9); 438 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 439 return send_str_over_rfcomm(cid, buffer); 440 } 441 442 static int hfp_ag_send_retrieve_can_hold_call_cmd(uint16_t cid){ 443 char buffer[40]; 444 const int size = sizeof(buffer); 445 int offset = snprintf(buffer, size, "\r\n%s:", HFP_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES); 446 offset += hfp_ag_call_services_join(buffer+offset, size-offset-9); 447 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 448 return send_str_over_rfcomm(cid, buffer); 449 } 450 451 452 static int hfp_ag_send_list_supported_generic_status_indicators_cmd(uint16_t cid){ 453 return hfp_ag_send_ok(cid); 454 } 455 456 static int hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(uint16_t cid){ 457 char buffer[40]; 458 const int size = sizeof(buffer); 459 int offset = snprintf(buffer, size, "\r\n%s:(", HFP_GENERIC_STATUS_INDICATOR); 460 offset += hfp_ag_generic_indicators_join(buffer + offset, size - offset - 10); 461 offset += snprintf(buffer+offset, size-offset, ")\r\n\r\nOK\r\n"); 462 return send_str_over_rfcomm(cid, buffer); 463 } 464 465 static int hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(uint16_t cid){ 466 char buffer[40]; 467 int offset = hfp_ag_generic_indicators_initial_status_join(buffer, sizeof(buffer) - 7); 468 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\nOK\r\n"); 469 return send_str_over_rfcomm(cid, buffer); 470 } 471 472 static int hfp_ag_send_transfer_ag_indicators_status_cmd(uint16_t cid, hfp_ag_indicator_t * indicator){ 473 char buffer[20]; 474 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d\r\n", 475 HFP_TRANSFER_AG_INDICATOR_STATUS, indicator->index, 476 indicator->status); 477 buffer[sizeof(buffer) - 1] = 0; 478 return send_str_over_rfcomm(cid, buffer); 479 } 480 481 static int hfp_ag_send_report_network_operator_name_cmd(uint16_t cid, hfp_network_opearator_t op){ 482 char buffer[41]; 483 if (strlen(op.name) == 0){ 484 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,,\r\n\r\nOK\r\n", HFP_QUERY_OPERATOR_SELECTION, op.mode); 485 } else { 486 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d,", HFP_QUERY_OPERATOR_SELECTION, op.mode, op.format); 487 offset += snprintf(buffer+offset, 16, "%s", op.name); 488 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n\r\nOK\r\n"); 489 } 490 return send_str_over_rfcomm(cid, buffer); 491 } 492 493 static inline int hfp_ag_send_cmd_with_space_and_int(uint16_t cid, const char * cmd, uint8_t value){ 494 char buffer[30]; 495 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", cmd, value); 496 return send_str_over_rfcomm(cid, buffer); 497 } 498 499 500 static inline int hfp_ag_send_cmd_with_int(uint16_t cid, const char * cmd, uint8_t value){ 501 char buffer[30]; 502 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n", cmd, value); 503 return send_str_over_rfcomm(cid, buffer); 504 } 505 506 static int hfp_ag_send_suggest_codec_cmd(uint16_t cid, uint8_t codec){ 507 return hfp_ag_send_cmd_with_int(cid, HFP_CONFIRM_COMMON_CODEC, codec); 508 } 509 510 static int hfp_ag_send_set_speaker_gain_cmd(uint16_t cid, uint8_t gain){ 511 return hfp_ag_send_cmd_with_int(cid, HFP_SET_SPEAKER_GAIN, gain); 512 } 513 514 static int hfp_ag_send_set_microphone_gain_cmd(uint16_t cid, uint8_t gain){ 515 return hfp_ag_send_cmd_with_int(cid, HFP_SET_MICROPHONE_GAIN, gain); 516 } 517 518 static int hfp_ag_send_set_response_and_hold(uint16_t cid, int state){ 519 return hfp_ag_send_cmd_with_space_and_int(cid, HFP_RESPONSE_AND_HOLD, state); 520 } 521 522 static int hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection_t * hfp_connection){ 523 char buffer[30]; 524 uint8_t evra_enabled = hfp_connection->enhanced_voice_recognition_enabled ? 1 : 0; 525 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, evra_enabled, hfp_connection->ag_vra_state); 526 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 527 } 528 529 static int hfp_ag_send_voice_recognition_cmd(hfp_connection_t * hfp_connection, uint8_t activate_voice_recognition){ 530 char buffer[30]; 531 if (hfp_connection->enhanced_voice_recognition_enabled){ 532 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition, hfp_connection->ag_vra_state); 533 } else { 534 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition); 535 } 536 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 537 } 538 539 static int hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection_t * hfp_connection){ 540 char buffer[HFP_VR_TEXT_HEADER_SIZE + HFP_MAX_VR_TEXT_SIZE]; 541 snprintf(buffer, sizeof(buffer), "\r\n%s: 1,%d,%X,%d,%d,\"%s\"\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, 542 hfp_connection->ag_vra_state, 543 hfp_connection->ag_msg.text_id, 544 hfp_connection->ag_msg.text_type, 545 hfp_connection->ag_msg.text_operation, 546 hfp_connection->ag_msg.text); 547 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 548 } 549 550 static uint8_t hfp_ag_suggest_codec(hfp_connection_t *hfp_connection){ 551 if (hfp_connection->sco_for_msbc_failed) return HFP_CODEC_CVSD; 552 553 #ifdef ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 554 if (hfp_supports_codec(HFP_CODEC_LC3_SWB, hfp_ag_codecs_nr, hfp_ag_codecs)){ 555 if (hfp_supports_codec(HFP_CODEC_LC3_SWB, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 556 return HFP_CODEC_LC3_SWB; 557 } 558 } 559 #endif 560 561 #ifdef ENABLE_HFP_WIDE_BAND_SPEECH 562 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_ag_codecs_nr, hfp_ag_codecs)){ 563 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 564 return HFP_CODEC_MSBC; 565 } 566 } 567 #endif 568 569 return HFP_CODEC_CVSD; 570 } 571 572 /* state machines */ 573 574 static uint8_t hfp_ag_esco_s4_supported(hfp_connection_t * hfp_connection){ 575 return (hfp_connection->remote_supported_features & (1<<HFP_HFSF_ESCO_S4)) && (hfp_ag_supported_features & (1 << HFP_AGSF_ESCO_S4)); 576 } 577 578 static int codecs_exchange_state_machine(hfp_connection_t * hfp_connection){ 579 /* events ( == commands): 580 HFP_CMD_AVAILABLE_CODECS == received AT+BAC with list of codecs 581 HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 582 hf_trigger_codec_connection_setup == received BCC 583 ag_trigger_codec_connection_setup == received from AG to send BCS 584 HFP_CMD_HF_CONFIRMED_CODEC == received AT+BCS 585 */ 586 switch (hfp_connection->codecs_state){ 587 case HFP_CODECS_EXCHANGED: 588 if (hfp_connection->command == HFP_CMD_AVAILABLE_CODECS){ 589 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 590 return 1; 591 } 592 break; 593 594 case HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE: 595 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 596 hfp_connection->ag_send_common_codec = true; 597 break; 598 default: 599 break; 600 } 601 602 if (hfp_connection->ag_send_common_codec){ 603 hfp_connection->ag_send_common_codec = false; 604 hfp_connection->codecs_state = HFP_CODECS_AG_SENT_COMMON_CODEC; 605 hfp_connection->suggested_codec = hfp_ag_suggest_codec(hfp_connection); 606 hfp_ag_send_suggest_codec_cmd(hfp_connection->rfcomm_cid, hfp_connection->suggested_codec); 607 return 1; 608 } 609 610 switch (hfp_connection->command){ 611 case HFP_CMD_AVAILABLE_CODECS: 612 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 613 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_LIST; 614 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 615 return 1; 616 } 617 618 switch (hfp_connection->codecs_state){ 619 case HFP_CODECS_AG_SENT_COMMON_CODEC: 620 hfp_connection->codecs_state = HFP_CODECS_AG_RESEND_COMMON_CODEC; 621 break; 622 default: 623 break; 624 } 625 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 626 return 1; 627 628 case HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 629 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE; 630 hfp_connection->establish_audio_connection = 1; 631 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 632 return 1; 633 634 case HFP_CMD_HF_CONFIRMED_CODEC: 635 if (hfp_connection->codec_confirmed != hfp_connection->suggested_codec){ 636 hfp_connection->codecs_state = HFP_CODECS_ERROR; 637 hfp_ag_send_error(hfp_connection->rfcomm_cid); 638 return 1; 639 } 640 hfp_connection->negotiated_codec = hfp_connection->codec_confirmed; 641 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 642 log_info("hfp: codec confirmed: %s", (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? "mSBC" : "CVSD"); 643 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 644 // now, pick link settings 645 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 646 #ifdef ENABLE_CC256X_ASSISTED_HFP 647 hfp_cc256x_prepare_for_sco(hfp_connection); 648 #endif 649 #ifdef ENABLE_RTK_PCM_WBS 650 hfp_connection->rtk_send_sco_config = true; 651 #endif 652 return 1; 653 default: 654 break; 655 } 656 return 0; 657 } 658 659 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 660 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 661 hfp_emit_slc_connection_event(hfp_connection->local_role, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 662 663 // HFP 4.35: "When [...] a new Service Level Connection is established all indicators are activated by default." 664 uint16_t i; 665 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 666 hfp_connection->ag_indicators[i].enabled = 1; 667 } 668 669 // if active call exist, set per-hfp_connection state active, too (when audio is on) 670 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 671 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 672 } 673 // if AG is ringing, also start ringing on the HF 674 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 675 switch (hfp_gsm_callsetup_status()){ 676 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 677 hfp_ag_hf_start_ringing_incoming(hfp_connection); 678 break; 679 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 680 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 681 break; 682 default: 683 break; 684 } 685 } 686 } 687 688 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 689 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 690 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 691 int sent = 0; 692 switch(hfp_connection->command){ 693 case HFP_CMD_SUPPORTED_FEATURES: 694 switch(hfp_connection->state){ 695 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 696 case HFP_EXCHANGE_SUPPORTED_FEATURES: 697 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 698 if (has_codec_negotiation_feature(hfp_connection)){ 699 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 700 } else { 701 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 702 } 703 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 704 return 1; 705 default: 706 break; 707 } 708 break; 709 case HFP_CMD_AVAILABLE_CODECS: 710 sent = codecs_exchange_state_machine(hfp_connection); 711 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 712 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 713 } 714 return sent; 715 716 case HFP_CMD_RETRIEVE_AG_INDICATORS: 717 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 718 // HF requested AG Indicators and we did expect it 719 hfp_connection->send_ag_indicators_segment = 0; 720 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 721 // continue below in state switch 722 } 723 break; 724 725 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 726 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 727 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 728 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 729 return 1; 730 731 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 732 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 733 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 734 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 735 } else if (has_hf_indicators_feature(hfp_connection)){ 736 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 737 } else { 738 hfp_ag_slc_established(hfp_connection); 739 } 740 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 741 return 1; 742 743 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 744 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 745 if (has_hf_indicators_feature(hfp_connection)){ 746 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 747 } 748 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 749 if (!has_hf_indicators_feature(hfp_connection)){ 750 hfp_ag_slc_established(hfp_connection); 751 } 752 return 1; 753 754 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 755 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 756 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 757 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 758 return 1; 759 760 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 761 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 762 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 763 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 764 return 1; 765 766 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 767 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 768 hfp_ag_slc_established(hfp_connection); 769 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 770 return 1; 771 default: 772 break; 773 } 774 775 switch (hfp_connection->state){ 776 case HFP_RETRIEVE_INDICATORS: { 777 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 778 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 779 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 780 if (next_segment < num_segments){ 781 // prepare sending of next segment 782 hfp_connection->send_ag_indicators_segment = next_segment; 783 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 784 } else { 785 // done, go to next state 786 hfp_connection->send_ag_indicators_segment = 0; 787 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 788 } 789 return 1; 790 } 791 default: 792 break; 793 } 794 return 0; 795 } 796 797 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 798 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 799 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 800 return hf && ag; 801 } 802 803 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 804 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 805 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 806 return hf && ag; 807 } 808 809 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 810 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 811 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 812 return hf && ag; 813 } 814 815 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 816 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 817 return false; 818 } 819 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 820 return false; 821 } 822 if (hfp_connection->ag_vra_send_command){ 823 return false; 824 } 825 return true; 826 } 827 828 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 829 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 830 return false; 831 } 832 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 833 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 834 return true; 835 } 836 return false; 837 } 838 return true; 839 } 840 841 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 842 switch (hfp_connection->state){ 843 case HFP_W2_CONNECT_SCO: 844 case HFP_W4_SCO_CONNECTED: 845 case HFP_AUDIO_CONNECTION_ESTABLISHED: 846 return true; 847 default: 848 return false; 849 } 850 } 851 852 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 853 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 854 855 uint8_t event[6]; 856 event[0] = HCI_EVENT_HFP_META; 857 event[1] = sizeof(event) - 2; 858 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 859 little_endian_store_16(event, 3, acl_handle); 860 event[5] = status; 861 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 862 } 863 864 865 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 866 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 867 868 uint8_t event[8]; 869 event[0] = HCI_EVENT_HFP_META; 870 event[1] = sizeof(event) - 2; 871 event[2] = HFP_SUBEVENT_HF_INDICATOR; 872 little_endian_store_16(event, 3, acl_handle); 873 little_endian_store_16(event, 5, uuid); 874 event[7] = value; 875 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 876 } 877 878 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 879 if (!hfp_ag_callback) return; 880 881 uint8_t event[5]; 882 event[0] = HCI_EVENT_HFP_META; 883 event[1] = sizeof(event) - 2; 884 event[2] = event_subtype; 885 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 886 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 887 } 888 889 static void hfp_ag_emit_custom_command_event(hfp_connection_t * hfp_connection){ 890 btstack_assert(sizeof(hfp_connection->line_buffer) < (255-5)); 891 892 uint16_t line_len = strlen((const char*)hfp_connection->line_buffer) + 1; 893 uint8_t event[7 + sizeof(hfp_connection->line_buffer)]; 894 event[0] = HCI_EVENT_HFP_META; 895 event[1] = 5 + line_len; 896 event[2] = HFP_SUBEVENT_CUSTOM_AT_COMMAND; 897 little_endian_store_16(event, 3, hfp_connection->acl_handle); 898 little_endian_store_16(event, 5, hfp_connection->ag_custom_at_command_id); 899 memcpy(&event[7], hfp_connection->line_buffer, line_len); 900 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, 7 + line_len); 901 } 902 903 // @return status 904 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 905 uint8_t status = ERROR_CODE_SUCCESS; 906 switch (hfp_connection->vra_state_requested){ 907 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 908 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 909 status = hfp_ag_setup_audio_connection(hfp_connection); 910 if (status != ERROR_CODE_SUCCESS){ 911 hfp_connection->vra_state_requested = hfp_connection->vra_state; 912 hfp_emit_voice_recognition_enabled(hfp_connection, status); 913 break; 914 } 915 } 916 hfp_connection->enhanced_voice_recognition_enabled = true; 917 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 918 hfp_connection->vra_state_requested = hfp_connection->vra_state; 919 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 920 break; 921 922 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 923 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 924 hfp_connection->vra_state_requested = hfp_connection->vra_state; 925 926 // release audio connection only if it was opened after audio VR activated 927 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 928 hfp_trigger_release_audio_connection(hfp_connection); 929 } 930 931 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 932 break; 933 934 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 935 // open only if audio connection does not already exist 936 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 937 status = hfp_ag_setup_audio_connection(hfp_connection); 938 if (status != ERROR_CODE_SUCCESS){ 939 hfp_connection->vra_state_requested = hfp_connection->vra_state; 940 hfp_emit_voice_recognition_enabled(hfp_connection, status); 941 break; 942 } 943 } 944 945 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 946 hfp_connection->vra_state_requested = hfp_connection->vra_state; 947 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 948 949 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 950 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 951 } else { 952 hfp_connection->emit_vra_enabled_after_audio_established = true; 953 } 954 break; 955 956 default: 957 break; 958 } 959 return status; 960 } 961 962 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 963 uint8_t done = 0; 964 uint8_t status; 965 966 switch (hfp_connection->vra_state_requested){ 967 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 968 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 969 if (done == 0){ 970 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 971 } else { 972 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 973 } 974 hfp_connection->vra_state_requested = hfp_connection->vra_state; 975 return done; 976 977 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 978 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 979 if (done == 0){ 980 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 981 } else { 982 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 983 } 984 hfp_connection->vra_state_requested = hfp_connection->vra_state; 985 return done; 986 987 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 988 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 989 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 990 if (done == 0){ 991 hfp_connection->vra_state_requested = hfp_connection->vra_state; 992 993 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 994 hfp_emit_voice_recognition_enabled(hfp_connection, done); 995 } else { 996 hfp_emit_voice_recognition_disabled(hfp_connection, done); 997 } 998 return 0; 999 } 1000 status = hfp_ag_vra_state_machine_two(hfp_connection); 1001 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1002 1003 default: 1004 log_error("state %u", hfp_connection->vra_state_requested); 1005 btstack_assert(false); 1006 return 0; 1007 } 1008 } 1009 1010 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 1011 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 1012 return 0; 1013 } 1014 int done = 0; 1015 uint8_t status; 1016 1017 // VRA action initiated by AG 1018 if (hfp_connection->ag_vra_send_command){ 1019 hfp_connection->ag_vra_send_command = false; 1020 return hfp_ag_vra_send_command(hfp_connection); 1021 } 1022 1023 if (hfp_connection->ag_vra_requested_by_hf){ 1024 hfp_connection->ag_vra_requested_by_hf = false; 1025 1026 // HF initiatied voice recognition, parser extracted activation value 1027 switch (hfp_connection->ag_activate_voice_recognition_value){ 1028 case 0: 1029 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1030 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 1031 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1032 } 1033 break; 1034 1035 case 1: 1036 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1037 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1038 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1039 } 1040 break; 1041 1042 case 2: 1043 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1044 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1045 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1046 } 1047 break; 1048 default: 1049 break; 1050 } 1051 if (done == 0){ 1052 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1053 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1054 return 1; 1055 } 1056 1057 status = hfp_ag_vra_state_machine_two(hfp_connection); 1058 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1059 } 1060 1061 return 0; 1062 } 1063 1064 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1065 int sent = codecs_exchange_state_machine(hfp_connection); 1066 if (sent) return 1; 1067 1068 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1069 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1070 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1071 return 1; 1072 } 1073 1074 switch(hfp_connection->command){ 1075 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1076 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1077 return 1; 1078 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1079 if (hfp_connection->network_operator.format != 0){ 1080 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1081 } else { 1082 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1083 } 1084 return 1; 1085 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1086 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1087 return 1; 1088 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1089 if (hfp_connection->extended_audio_gateway_error){ 1090 hfp_connection->extended_audio_gateway_error = 0; 1091 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1092 return 1; 1093 } 1094 break; 1095 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1096 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1097 return 1; 1098 default: 1099 break; 1100 } 1101 return 0; 1102 } 1103 1104 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1105 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1106 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1107 1108 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1109 1110 if (hfp_connection->release_audio_connection){ 1111 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1112 hfp_connection->release_audio_connection = 0; 1113 gap_disconnect(hfp_connection->sco_handle); 1114 return 1; 1115 } 1116 1117 // accept incoming audio connection (codec negotiation is not used) 1118 if (hfp_connection->accept_sco){ 1119 // notify about codec selection if not done already 1120 if (hfp_connection->negotiated_codec == 0){ 1121 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1122 } 1123 // 1124 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1125 hfp_connection->accept_sco = 0; 1126 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1127 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1128 return 1; 1129 } 1130 1131 // run codecs exchange 1132 int sent = codecs_exchange_state_machine(hfp_connection); 1133 if (sent) return 1; 1134 1135 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1136 if (hfp_connection->establish_audio_connection){ 1137 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1138 hfp_connection->establish_audio_connection = 0; 1139 hfp_setup_synchronous_connection(hfp_connection); 1140 return 1; 1141 } 1142 return 0; 1143 } 1144 1145 static void hfp_ag_set_callsetup_indicator(void){ 1146 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1147 if (!indicator){ 1148 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1149 return; 1150 }; 1151 indicator->status = hfp_gsm_callsetup_status(); 1152 } 1153 1154 static void hfp_ag_set_callheld_indicator(void){ 1155 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1156 if (!indicator){ 1157 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1158 return; 1159 }; 1160 indicator->status = hfp_gsm_callheld_status(); 1161 } 1162 1163 // 1164 // transition implementations for hfp_ag_call_state_machine 1165 // 1166 1167 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1168 if (use_in_band_tone()){ 1169 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1170 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1171 } else { 1172 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1173 } 1174 } 1175 1176 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1177 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1178 } 1179 1180 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1181 hfp_connection->ag_ring = 0; 1182 hfp_connection->ag_send_clip = 0; 1183 } 1184 1185 1186 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1187 btstack_linked_list_iterator_t it; 1188 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1189 while (btstack_linked_list_iterator_has_next(&it)){ 1190 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1191 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1192 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1193 1194 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1195 hfp_ag_run_for_context(hfp_connection); 1196 } 1197 } 1198 1199 static void hfp_ag_trigger_ring_and_clip(void) { 1200 btstack_linked_list_iterator_t it; 1201 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1202 while (btstack_linked_list_iterator_has_next(&it)){ 1203 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1204 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1205 switch (hfp_connection->call_state){ 1206 case HFP_CALL_INCOMING_RINGING: 1207 case HFP_CALL_OUTGOING_RINGING: 1208 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1209 // Queue RING on this connection 1210 hfp_connection->ag_ring = 1; 1211 1212 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1213 // "If the calling subscriber number information is available from the network, the AG shall issue the 1214 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1215 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1216 1217 // trigger next message 1218 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1219 break; 1220 default: 1221 break; 1222 } 1223 } 1224 } 1225 1226 // trigger RING and CLIP messages on connections that are ringing 1227 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1228 hfp_ag_trigger_ring_and_clip(); 1229 1230 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1231 btstack_run_loop_add_timer(timer); 1232 } 1233 1234 static void hfp_ag_ring_timeout_stop(void){ 1235 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1236 } 1237 1238 static void hfp_ag_start_ringing(void){ 1239 // setup ring timer 1240 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1241 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1242 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1243 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1244 1245 // emit start ringing 1246 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1247 1248 // send initial RING + CLIP 1249 hfp_ag_trigger_ring_and_clip(); 1250 } 1251 1252 static void hfp_ag_stop_ringing(void){ 1253 hfp_ag_ring_timeout_stop(); 1254 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1255 1256 btstack_linked_list_iterator_t it; 1257 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1258 while (btstack_linked_list_iterator_has_next(&it)){ 1259 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1260 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1261 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1262 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1263 hfp_ag_hf_stop_ringing(hfp_connection); 1264 } 1265 } 1266 1267 static void hfp_ag_trigger_incoming_call_idle(void){ 1268 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1269 if (indicator_index < 0) return; 1270 1271 // update callsetup state in connections 1272 btstack_linked_list_iterator_t it; 1273 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1274 while (btstack_linked_list_iterator_has_next(&it)){ 1275 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1276 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1277 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1278 1279 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1280 1281 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1282 1283 hfp_ag_run_for_context(hfp_connection); 1284 } 1285 1286 // start local ringing - started after connection state has been updated 1287 hfp_ag_start_ringing(); 1288 } 1289 1290 static void hfp_ag_trigger_outgoing_call(void){ 1291 btstack_linked_list_iterator_t it; 1292 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1293 while (btstack_linked_list_iterator_has_next(&it)){ 1294 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1295 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1296 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1297 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1298 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1299 } 1300 } 1301 } 1302 1303 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1304 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1305 1306 // trigger callsetup to be 1307 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1308 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1309 1310 int indicator_index ; 1311 1312 hfp_ag_set_callsetup_indicator(); 1313 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1314 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1315 1316 // put current call on hold if active 1317 if (put_call_on_hold){ 1318 log_info("AG putting current call on hold for new outgoing call"); 1319 hfp_ag_set_callheld_indicator(); 1320 indicator_index = get_ag_indicator_index_for_name("callheld"); 1321 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1322 } 1323 1324 // start audio if needed 1325 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1326 } 1327 1328 static void hfp_ag_transfer_indicator(const char * name){ 1329 int indicator_index = get_ag_indicator_index_for_name(name); 1330 if (indicator_index < 0) return; 1331 1332 btstack_linked_list_iterator_t it; 1333 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1334 while (btstack_linked_list_iterator_has_next(&it)){ 1335 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1336 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1337 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1338 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1339 hfp_ag_run_for_context(hfp_connection); 1340 } 1341 } 1342 1343 static void hfp_ag_transfer_callsetup_state(void){ 1344 hfp_ag_transfer_indicator("callsetup"); 1345 } 1346 1347 static void hfp_ag_transfer_call_state(void){ 1348 hfp_ag_transfer_indicator("call"); 1349 } 1350 1351 static void hfp_ag_transfer_callheld_state(void){ 1352 hfp_ag_transfer_indicator("callheld"); 1353 } 1354 1355 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1356 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1357 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1358 1359 hfp_ag_stop_ringing(); 1360 1361 btstack_linked_list_iterator_t it; 1362 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1363 while (btstack_linked_list_iterator_has_next(&it)){ 1364 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1365 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1366 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1367 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1368 1369 if (hfp_connection == source){ 1370 1371 if (use_in_band_tone()){ 1372 hfp_connection->call_state = HFP_CALL_ACTIVE; 1373 } else { 1374 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1375 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1376 } 1377 1378 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1379 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1380 1381 } else { 1382 hfp_connection->call_state = HFP_CALL_IDLE; 1383 } 1384 hfp_ag_run_for_context(hfp_connection); 1385 } 1386 } 1387 1388 static void hfp_ag_ag_accept_call(void){ 1389 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1390 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1391 1392 hfp_ag_stop_ringing(); 1393 1394 btstack_linked_list_iterator_t it; 1395 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1396 while (btstack_linked_list_iterator_has_next(&it)){ 1397 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1398 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1399 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1400 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1401 1402 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1403 1404 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1405 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1406 1407 hfp_ag_run_for_context(hfp_connection); 1408 break; // only single 1409 } 1410 } 1411 1412 static void hfp_ag_trigger_reject_call(void){ 1413 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1414 1415 hfp_ag_stop_ringing(); 1416 1417 btstack_linked_list_iterator_t it; 1418 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1419 while (btstack_linked_list_iterator_has_next(&it)){ 1420 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1421 if (connection->local_role != HFP_ROLE_AG) continue; 1422 1423 switch (connection->call_state){ 1424 case HFP_CALL_INCOMING_RINGING: 1425 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1426 case HFP_CALL_OUTGOING_RINGING: 1427 case HFP_CALL_OUTGOING_INITIATED: 1428 case HFP_CALL_OUTGOING_DIALING: 1429 break; 1430 default: 1431 continue; 1432 } 1433 1434 connection->call_state = HFP_CALL_IDLE; 1435 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1436 1437 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1438 connection->release_audio_connection = 1; 1439 } 1440 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1441 hfp_ag_run_for_context(connection); 1442 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1443 } 1444 } 1445 1446 static void hfp_ag_trigger_terminate_call(void){ 1447 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1448 1449 // no ringing during call 1450 1451 btstack_linked_list_iterator_t it; 1452 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1453 while (btstack_linked_list_iterator_has_next(&it)){ 1454 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1455 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1456 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1457 1458 hfp_connection->call_state = HFP_CALL_IDLE; 1459 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1460 1461 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1462 hfp_connection->release_audio_connection = 1; 1463 } 1464 1465 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1466 hfp_ag_run_for_context(hfp_connection); 1467 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1468 } 1469 } 1470 1471 static void hfp_ag_set_call_indicator(void){ 1472 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1473 if (!indicator){ 1474 log_error("hfp_ag_set_call_state: call indicator is missing"); 1475 return; 1476 }; 1477 indicator->status = hfp_gsm_call_status(); 1478 } 1479 1480 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1481 btstack_linked_list_iterator_t it; 1482 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1483 while (btstack_linked_list_iterator_has_next(&it)){ 1484 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1485 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1486 if (hfp_connection->call_state == call_state) return hfp_connection; 1487 } 1488 return NULL; 1489 } 1490 1491 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1492 btstack_linked_list_iterator_t it; 1493 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1494 while (btstack_linked_list_iterator_has_next(&it)){ 1495 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1496 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1497 hfp_connection->send_response_and_hold_status = state + 1; 1498 } 1499 } 1500 1501 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1502 int indicator_index; 1503 switch (hfp_connection->call_state){ 1504 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1505 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1506 // we got event: audio hfp_connection established 1507 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1508 break; 1509 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1510 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1511 // we got event: audio hfp_connection established 1512 hfp_connection->call_state = HFP_CALL_ACTIVE; 1513 break; 1514 case HFP_CALL_W2_SEND_CALL_WAITING: 1515 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1516 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1517 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1518 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1519 break; 1520 default: 1521 break; 1522 } 1523 return 0; 1524 } 1525 1526 // functions extracted from hfp_ag_call_sm below 1527 static void hfp_ag_handle_reject_outgoing_call(void){ 1528 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1529 if (!hfp_connection){ 1530 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1531 return; 1532 } 1533 1534 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1535 hfp_connection->call_state = HFP_CALL_IDLE; 1536 hfp_connection->send_error = 1; 1537 hfp_ag_run_for_context(hfp_connection); 1538 } 1539 1540 // hfp_connection is used to identify originating HF 1541 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1542 1543 // allow to intercept call statemachine events 1544 if (hfp_ag_custom_call_sm_handler != NULL){ 1545 bool handle_event = (*hfp_ag_custom_call_sm_handler)(event); 1546 if (!handle_event) return; 1547 } 1548 1549 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1550 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1551 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1552 1553 switch (event){ 1554 case HFP_AG_INCOMING_CALL: 1555 switch (hfp_gsm_call_status()){ 1556 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1557 switch (hfp_gsm_callsetup_status()){ 1558 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1559 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1560 hfp_ag_set_callsetup_indicator(); 1561 hfp_ag_trigger_incoming_call_idle(); 1562 log_info("AG rings"); 1563 break; 1564 default: 1565 break; 1566 } 1567 break; 1568 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1569 switch (hfp_gsm_callsetup_status()){ 1570 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1571 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1572 hfp_ag_set_callsetup_indicator(); 1573 hfp_ag_trigger_incoming_call_during_active_one(); 1574 log_info("AG call waiting"); 1575 break; 1576 default: 1577 break; 1578 } 1579 break; 1580 default: 1581 break; 1582 } 1583 break; 1584 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1585 switch (hfp_gsm_call_status()){ 1586 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1587 switch (hfp_gsm_callsetup_status()){ 1588 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1589 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1590 hfp_ag_set_call_indicator(); 1591 hfp_ag_set_callsetup_indicator(); 1592 hfp_ag_ag_accept_call(); 1593 log_info("AG answers call, accept call by GSM"); 1594 break; 1595 default: 1596 break; 1597 } 1598 break; 1599 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1600 switch (hfp_gsm_callsetup_status()){ 1601 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1602 log_info("AG: current call is placed on hold, incoming call gets active"); 1603 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1604 hfp_ag_set_callsetup_indicator(); 1605 hfp_ag_set_callheld_indicator(); 1606 hfp_ag_transfer_callsetup_state(); 1607 hfp_ag_transfer_callheld_state(); 1608 break; 1609 default: 1610 break; 1611 } 1612 break; 1613 default: 1614 break; 1615 } 1616 break; 1617 1618 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1619 switch (hfp_gsm_call_status()){ 1620 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1621 switch (hfp_gsm_callheld_status()){ 1622 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1623 log_info("AG: joining held call with active call"); 1624 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1625 hfp_ag_set_callheld_indicator(); 1626 hfp_ag_transfer_callheld_state(); 1627 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1628 break; 1629 default: 1630 break; 1631 } 1632 break; 1633 default: 1634 break; 1635 } 1636 break; 1637 1638 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1639 switch (hfp_gsm_call_status()){ 1640 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1641 switch (hfp_gsm_callsetup_status()){ 1642 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1643 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1644 hfp_ag_set_callsetup_indicator(); 1645 hfp_ag_set_call_indicator(); 1646 hfp_ag_hf_accept_call(hfp_connection); 1647 hfp_connection->ok_pending = 1; 1648 log_info("HF answers call, accept call by GSM"); 1649 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1650 break; 1651 default: 1652 break; 1653 } 1654 break; 1655 default: 1656 break; 1657 } 1658 break; 1659 1660 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1661 switch (hfp_gsm_call_status()){ 1662 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1663 switch (hfp_gsm_callsetup_status()){ 1664 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1665 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1666 hfp_ag_response_and_hold_active = true; 1667 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1668 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1669 // as with regular call 1670 hfp_ag_set_call_indicator(); 1671 hfp_ag_set_callsetup_indicator(); 1672 hfp_ag_ag_accept_call(); 1673 log_info("AG response and hold - hold by AG"); 1674 break; 1675 default: 1676 break; 1677 } 1678 break; 1679 default: 1680 break; 1681 } 1682 break; 1683 1684 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1685 switch (hfp_gsm_call_status()){ 1686 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1687 switch (hfp_gsm_callsetup_status()){ 1688 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1689 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1690 hfp_ag_response_and_hold_active = true; 1691 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1692 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1693 // as with regular call 1694 hfp_ag_set_call_indicator(); 1695 hfp_ag_set_callsetup_indicator(); 1696 hfp_ag_hf_accept_call(hfp_connection); 1697 log_info("AG response and hold - hold by HF"); 1698 break; 1699 default: 1700 break; 1701 } 1702 break; 1703 default: 1704 break; 1705 } 1706 break; 1707 1708 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1709 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1710 if (!hfp_ag_response_and_hold_active) break; 1711 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1712 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1713 hfp_ag_response_and_hold_active = false; 1714 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1715 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1716 log_info("Held Call accepted and active"); 1717 break; 1718 1719 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1720 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1721 if (!hfp_ag_response_and_hold_active) break; 1722 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1723 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1724 hfp_ag_response_and_hold_active = false; 1725 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1726 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1727 // from terminate by ag 1728 hfp_ag_set_call_indicator(); 1729 hfp_ag_trigger_terminate_call(); 1730 break; 1731 1732 case HFP_AG_TERMINATE_CALL_BY_HF: 1733 switch (hfp_gsm_call_status()){ 1734 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1735 switch (hfp_gsm_callsetup_status()){ 1736 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1737 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1738 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1739 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1740 hfp_ag_set_callsetup_indicator(); 1741 hfp_ag_transfer_callsetup_state(); 1742 hfp_ag_trigger_reject_call(); 1743 log_info("HF Rejected Incoming call, AG terminate call"); 1744 break; 1745 default: 1746 break; 1747 } 1748 break; 1749 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1750 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1751 hfp_ag_set_callsetup_indicator(); 1752 hfp_ag_set_call_indicator(); 1753 hfp_ag_trigger_terminate_call(); 1754 log_info("AG terminate call"); 1755 break; 1756 default: 1757 break; 1758 } 1759 break; 1760 1761 case HFP_AG_TERMINATE_CALL_BY_AG: 1762 switch (hfp_gsm_call_status()){ 1763 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1764 switch (hfp_gsm_callsetup_status()){ 1765 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1766 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1767 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1768 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1769 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1770 hfp_ag_set_callsetup_indicator(); 1771 hfp_ag_trigger_reject_call(); 1772 log_info("AG Rejected Incoming call, AG terminate call"); 1773 break; 1774 default: 1775 break; 1776 } 1777 break; 1778 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1779 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1780 hfp_ag_set_callsetup_indicator(); 1781 hfp_ag_set_call_indicator(); 1782 hfp_ag_trigger_terminate_call(); 1783 log_info("AG terminate call"); 1784 break; 1785 default: 1786 break; 1787 } 1788 break; 1789 case HFP_AG_CALL_DROPPED: 1790 switch (hfp_gsm_call_status()){ 1791 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1792 switch (hfp_gsm_callsetup_status()){ 1793 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1794 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1795 hfp_ag_stop_ringing(); 1796 break; 1797 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1798 log_info("Outgoing call interrupted\n"); 1799 break; 1800 default: 1801 break; 1802 } 1803 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1804 hfp_ag_set_callsetup_indicator(); 1805 hfp_ag_transfer_callsetup_state(); 1806 hfp_ag_trigger_terminate_call(); 1807 break; 1808 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1809 if (hfp_ag_response_and_hold_active) { 1810 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1811 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1812 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1813 } 1814 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1815 hfp_ag_set_callsetup_indicator(); 1816 hfp_ag_set_call_indicator(); 1817 hfp_ag_trigger_terminate_call(); 1818 log_info("AG notify call dropped"); 1819 break; 1820 default: 1821 break; 1822 } 1823 break; 1824 1825 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1826 // directly reject call if number of free slots is exceeded 1827 if (!hfp_gsm_call_possible()){ 1828 hfp_connection->send_error = 1; 1829 hfp_ag_run_for_context(hfp_connection); 1830 break; 1831 } 1832 1833 // note: number not used currently 1834 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1835 1836 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1837 1838 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1839 break; 1840 1841 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1842 // directly reject call if number of free slots is exceeded 1843 if (!hfp_gsm_call_possible()) { 1844 // TODO: no error for user 1845 break; 1846 } 1847 switch (hfp_gsm_call_status()) { 1848 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1849 switch (hfp_gsm_callsetup_status()) { 1850 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1851 // note: number not used currently 1852 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1853 // init call state for all connections 1854 hfp_ag_trigger_outgoing_call(); 1855 // get first one and accept call 1856 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1857 if (hfp_connection) { 1858 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1859 } 1860 break; 1861 default: 1862 // TODO: no error for user 1863 break; 1864 } 1865 break; 1866 default: 1867 // TODO: no error for user 1868 break; 1869 } 1870 break; 1871 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1872 // directly reject call if number of free slots is exceeded 1873 if (!hfp_gsm_call_possible()){ 1874 hfp_connection->send_error = 1; 1875 hfp_ag_run_for_context(hfp_connection); 1876 break; 1877 } 1878 1879 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1880 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1881 1882 log_info("Redial last number"); 1883 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1884 1885 if (strlen(last_dialed_number) > 0){ 1886 log_info("Last number exists: accept call"); 1887 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1888 } else { 1889 log_info("log_infoLast number missing: reject call"); 1890 hfp_ag_handle_reject_outgoing_call(); 1891 } 1892 break; 1893 } 1894 case HFP_AG_OUTGOING_CALL_REJECTED: 1895 hfp_ag_handle_reject_outgoing_call(); 1896 break; 1897 1898 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1899 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1900 if (!hfp_connection){ 1901 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1902 break; 1903 } 1904 1905 hfp_connection->ok_pending = 1; 1906 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1907 break; 1908 } 1909 case HFP_AG_OUTGOING_CALL_RINGING: 1910 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1911 if (!hfp_connection){ 1912 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1913 break; 1914 } 1915 1916 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1917 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1918 hfp_ag_set_callsetup_indicator(); 1919 hfp_ag_transfer_callsetup_state(); 1920 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1921 break; 1922 1923 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1924 // get outgoing call 1925 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1926 if (!hfp_connection){ 1927 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1928 } 1929 if (!hfp_connection){ 1930 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1931 break; 1932 } 1933 1934 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1935 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1936 hfp_connection->call_state = HFP_CALL_ACTIVE; 1937 hfp_ag_set_callsetup_indicator(); 1938 hfp_ag_set_call_indicator(); 1939 hfp_ag_transfer_call_state(); 1940 hfp_ag_transfer_callsetup_state(); 1941 if (callheld_status_call_on_hold_and_no_active_calls){ 1942 hfp_ag_set_callheld_indicator(); 1943 hfp_ag_transfer_callheld_state(); 1944 } 1945 hfp_ag_hf_stop_ringing(hfp_connection); 1946 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1947 break; 1948 } 1949 1950 case HFP_AG_CALL_HOLD_USER_BUSY: 1951 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1952 hfp_ag_set_callsetup_indicator(); 1953 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1954 hfp_connection->call_state = HFP_CALL_ACTIVE; 1955 log_info("AG: Call Waiting, User Busy"); 1956 break; 1957 1958 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1959 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1960 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1961 1962 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1963 if (call_held || call_setup_in_progress){ 1964 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1965 0, NULL); 1966 1967 } 1968 1969 if (call_setup_in_progress){ 1970 log_info("AG: Call Dropped, Accept new call"); 1971 hfp_ag_set_callsetup_indicator(); 1972 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1973 } else { 1974 log_info("AG: Call Dropped, Resume held call"); 1975 } 1976 if (call_held){ 1977 hfp_ag_set_callheld_indicator(); 1978 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1979 } 1980 1981 hfp_connection->call_state = HFP_CALL_ACTIVE; 1982 break; 1983 } 1984 1985 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1986 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1987 // only update if callsetup changed 1988 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1989 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1990 NULL); 1991 1992 if (call_setup_in_progress){ 1993 log_info("AG: Call on Hold, Accept new call"); 1994 hfp_ag_set_callsetup_indicator(); 1995 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1996 } else { 1997 log_info("AG: Swap calls"); 1998 } 1999 2000 hfp_ag_set_callheld_indicator(); 2001 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 2002 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2003 hfp_connection->call_state = HFP_CALL_ACTIVE; 2004 break; 2005 } 2006 2007 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 2008 // Adds a held call to the conversation. 2009 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 2010 log_info("AG: Join 3-way-call"); 2011 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 2012 hfp_ag_set_callheld_indicator(); 2013 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2014 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 2015 } 2016 hfp_connection->call_state = HFP_CALL_ACTIVE; 2017 break; 2018 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 2019 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 2020 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 2021 log_info("AG: Transfer call -> Connect two calls and disconnect"); 2022 hfp_ag_set_call_indicator(); 2023 hfp_ag_set_callheld_indicator(); 2024 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 2025 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2026 hfp_connection->call_state = HFP_CALL_IDLE; 2027 break; 2028 2029 default: 2030 break; 2031 } 2032 2033 2034 } 2035 2036 2037 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2038 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2039 if (!active_call) return; 2040 2041 int idx = active_call->index; 2042 hfp_enhanced_call_dir_t dir = active_call->direction; 2043 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2044 hfp_enhanced_call_mode_t mode = active_call->mode; 2045 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2046 uint8_t type = active_call->clip_type; 2047 char * number = active_call->clip_number; 2048 2049 char buffer[100]; 2050 // TODO: check length of a buffer, to fit the MTU 2051 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2052 if (number){ 2053 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2054 } 2055 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2056 log_info("hfp_ag_send_current_call_status 000 index %d, dir %d, status %d, mode %d, mpty %d, type %d, number %s", idx, dir, status, 2057 mode, mpty, type, number); 2058 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2059 } 2060 2061 // sends pending command, returns if command was sent 2062 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2063 if (hfp_connection->send_status_of_current_calls){ 2064 hfp_connection->ok_pending = 0; 2065 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2066 hfp_connection->next_call_index++; 2067 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2068 return 1; 2069 } else { 2070 // TODO: this code should be removed. check a) before setting send_status_of_current_calls, or b) right before hfp_ag_send_call_status above 2071 hfp_connection->next_call_index = 0; 2072 hfp_connection->ok_pending = 1; 2073 hfp_connection->send_status_of_current_calls = 0; 2074 } 2075 } 2076 2077 if (hfp_connection->ag_notify_incoming_call_waiting){ 2078 hfp_connection->ag_notify_incoming_call_waiting = 0; 2079 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2080 return 1; 2081 } 2082 2083 if (hfp_connection->send_error){ 2084 hfp_connection->send_error = 0; 2085 hfp_connection->command = HFP_CMD_NONE; 2086 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2087 return 1; 2088 } 2089 2090 // note: before update AG indicators and ok_pending 2091 if (hfp_connection->send_response_and_hold_status){ 2092 int status = hfp_connection->send_response_and_hold_status - 1; 2093 hfp_connection->send_response_and_hold_status = 0; 2094 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2095 return 1; 2096 } 2097 2098 // note: before ok_pending and send_error to allow for unsolicited result on custom command 2099 if (hfp_connection->send_custom_message != NULL){ 2100 const char * message = hfp_connection->send_custom_message; 2101 hfp_connection->send_custom_message = NULL; 2102 send_str_over_rfcomm(hfp_connection->rfcomm_cid, message); 2103 hfp_emit_event(hfp_connection, HFP_SUBEVENT_COMPLETE, ERROR_CODE_SUCCESS); 2104 return 1; 2105 } 2106 2107 if (hfp_connection->ok_pending){ 2108 hfp_connection->ok_pending = 0; 2109 hfp_connection->command = HFP_CMD_NONE; 2110 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2111 return 1; 2112 } 2113 2114 // update AG indicators only if enabled by AT+CMER=3,0,0,1 2115 if ((hfp_connection->enable_status_update_for_ag_indicators == 1) && (hfp_connection->ag_indicators_status_update_bitmap != 0)){ 2116 uint16_t i; 2117 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2118 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2119 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2120 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2121 return 1; 2122 } 2123 } 2124 } 2125 2126 if (hfp_connection->ag_send_no_carrier){ 2127 hfp_connection->ag_send_no_carrier = false; 2128 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2129 return 1; 2130 } 2131 2132 if (hfp_connection->send_phone_number_for_voice_tag){ 2133 hfp_connection->send_phone_number_for_voice_tag = 0; 2134 hfp_connection->command = HFP_CMD_NONE; 2135 hfp_connection->ok_pending = 1; 2136 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2137 return 1; 2138 } 2139 2140 if (hfp_connection->send_subscriber_number){ 2141 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2142 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2143 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2144 } else { 2145 hfp_connection->send_subscriber_number = 0; 2146 hfp_connection->next_subscriber_number_to_send = 0; 2147 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2148 } 2149 hfp_connection->command = HFP_CMD_NONE; 2150 return 1; 2151 } 2152 2153 if (hfp_connection->send_microphone_gain){ 2154 hfp_connection->send_microphone_gain = 0; 2155 hfp_connection->command = HFP_CMD_NONE; 2156 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2157 return 1; 2158 } 2159 2160 if (hfp_connection->send_speaker_gain){ 2161 hfp_connection->send_speaker_gain = 0; 2162 hfp_connection->command = HFP_CMD_NONE; 2163 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2164 return 1; 2165 } 2166 2167 if (hfp_connection->send_ag_status_indicators){ 2168 hfp_connection->send_ag_status_indicators = 0; 2169 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2170 return 1; 2171 } 2172 2173 return 0; 2174 } 2175 2176 // sends pending command, returns if command was sent 2177 static int hfp_ag_run_ring_and_clip(hfp_connection_t *hfp_connection){ 2178 // delay RING/CLIP until audio connection has been established for incoming calls 2179 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2180 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2181 if (hfp_connection->ag_ring){ 2182 hfp_connection->ag_ring = 0; 2183 hfp_connection->command = HFP_CMD_NONE; 2184 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2185 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2186 return 1; 2187 } 2188 2189 if (hfp_connection->ag_send_clip){ 2190 hfp_connection->ag_send_clip = 0; 2191 hfp_connection->command = HFP_CMD_NONE; 2192 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2193 return 1; 2194 } 2195 } 2196 return 0; 2197 } 2198 2199 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2200 2201 btstack_assert(hfp_connection != NULL); 2202 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2203 2204 // during SDP query, RFCOMM CID is not set 2205 if (hfp_connection->rfcomm_cid == 0) return; 2206 2207 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2208 hfp_connection->emit_vra_enabled_after_audio_established = false; 2209 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2210 } 2211 2212 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2213 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2214 hfp_connection->release_audio_connection = 0; 2215 gap_disconnect(hfp_connection->sco_handle); 2216 return; 2217 } 2218 2219 // configure NBS/WBS if needed using vendor-specific HCI commands 2220 if (hci_can_send_command_packet_now()) { 2221 #ifdef ENABLE_CC256X_ASSISTED_HFP 2222 // WBS Disassociate 2223 if (hfp_connection->cc256x_send_wbs_disassociate){ 2224 hfp_connection->cc256x_send_wbs_disassociate = false; 2225 hci_send_cmd(&hci_ti_wbs_disassociate); 2226 return; 2227 } 2228 // Write Codec Config 2229 if (hfp_connection->cc256x_send_write_codec_config){ 2230 hfp_connection->cc256x_send_write_codec_config = false; 2231 hfp_cc256x_write_codec_config(hfp_connection); 2232 return; 2233 } 2234 // WBS Associate 2235 if (hfp_connection->cc256x_send_wbs_associate){ 2236 hfp_connection->cc256x_send_wbs_associate = false; 2237 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2238 return; 2239 } 2240 #endif 2241 #ifdef ENABLE_BCM_PCM_WBS 2242 // Enable WBS 2243 if (hfp_connection->bcm_send_enable_wbs){ 2244 hfp_connection->bcm_send_enable_wbs = false; 2245 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2246 return; 2247 } 2248 // Write I2S/PCM params 2249 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2250 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2251 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2252 return; 2253 } 2254 // Disable WBS 2255 if (hfp_connection->bcm_send_disable_wbs){ 2256 hfp_connection->bcm_send_disable_wbs = false; 2257 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2258 return; 2259 } 2260 #endif 2261 #ifdef ENABLE_RTK_PCM_WBS 2262 // Configure CVSD vs. mSBC 2263 if (hfp_connection->rtk_send_sco_config){ 2264 hfp_connection->rtk_send_sco_config = false; 2265 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2266 log_info("RTK SCO: 16k + mSBC"); 2267 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2268 } else { 2269 log_info("RTK SCO: 16k + CVSD"); 2270 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2271 } 2272 return; 2273 } 2274 #endif 2275 } 2276 2277 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2278 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2279 hfp_finalize_connection_context(hfp_connection); 2280 return; 2281 } 2282 #endif 2283 2284 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2285 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2286 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2287 return; 2288 } 2289 2290 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2291 2292 if (!cmd_sent){ 2293 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2294 } 2295 2296 if (!cmd_sent){ 2297 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2298 } 2299 2300 if (!cmd_sent){ 2301 cmd_sent = call_setup_state_machine(hfp_connection); 2302 } 2303 2304 if (!cmd_sent){ 2305 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2306 } 2307 2308 if (!cmd_sent){ 2309 cmd_sent = hfp_ag_run_ring_and_clip(hfp_connection); 2310 } 2311 2312 if (!cmd_sent){ 2313 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2314 } 2315 2316 // disconnect 2317 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2318 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2319 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2320 } 2321 2322 if (cmd_sent){ 2323 hfp_connection->command = HFP_CMD_NONE; 2324 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2325 } 2326 } 2327 2328 static int hfp_parser_is_end_of_line(uint8_t byte){ 2329 return (byte == '\n') || (byte == '\r'); 2330 } 2331 2332 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2333 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2334 if (size < 1) return; 2335 uint8_t status = ERROR_CODE_SUCCESS; 2336 2337 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2338 #ifdef ENABLE_HFP_AT_MESSAGES 2339 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2340 #endif 2341 2342 // process messages byte-wise 2343 int pos; 2344 for (pos = 0; pos < size ; pos++){ 2345 hfp_parse(hfp_connection, packet[pos], 0); 2346 2347 // parse until end of line 2348 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2349 2350 hfp_generic_status_indicator_t * indicator; 2351 switch(hfp_connection->command){ 2352 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2353 hfp_connection->command = HFP_CMD_NONE; 2354 hfp_connection->ag_vra_requested_by_hf = true; 2355 break; 2356 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2357 hfp_connection->command = HFP_CMD_NONE; 2358 if (hfp_ag_response_and_hold_active){ 2359 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2360 } 2361 hfp_connection->ok_pending = 1; 2362 break; 2363 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2364 hfp_connection->command = HFP_CMD_NONE; 2365 switch(hfp_connection->ag_response_and_hold_action){ 2366 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2367 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2368 break; 2369 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2370 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2371 break; 2372 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2373 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2374 break; 2375 default: 2376 break; 2377 } 2378 hfp_connection->ok_pending = 1; 2379 break; 2380 case HFP_CMD_HF_INDICATOR_STATUS: 2381 hfp_connection->command = HFP_CMD_NONE; 2382 2383 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2384 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2385 switch (indicator->uuid){ 2386 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2387 if (hfp_connection->parser_indicator_value > 1) { 2388 hfp_connection->send_error = 1; 2389 break; 2390 } 2391 hfp_connection->ok_pending = 1; 2392 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2393 break; 2394 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2395 if (hfp_connection->parser_indicator_value > 100){ 2396 hfp_connection->send_error = 1; 2397 break; 2398 } 2399 hfp_connection->ok_pending = 1; 2400 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2401 break; 2402 default: 2403 hfp_connection->send_error = 1; 2404 break; 2405 } 2406 } else { 2407 hfp_connection->send_error = 1; 2408 } 2409 break; 2410 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2411 // expected by SLC state machine 2412 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2413 hfp_connection->send_ag_indicators_segment = 0; 2414 hfp_connection->send_ag_status_indicators = 1; 2415 break; 2416 case HFP_CMD_LIST_CURRENT_CALLS: 2417 hfp_connection->command = HFP_CMD_NONE; 2418 hfp_connection->next_call_index = 0; 2419 hfp_connection->send_status_of_current_calls = 1; 2420 break; 2421 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2422 hfp_connection->command = HFP_CMD_NONE; 2423 if (hfp_ag_subscriber_numbers_count == 0){ 2424 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2425 break; 2426 } 2427 hfp_connection->next_subscriber_number_to_send = 0; 2428 hfp_connection->send_subscriber_number = 1; 2429 break; 2430 case HFP_CMD_TRANSMIT_DTMF_CODES: 2431 { 2432 hfp_connection->command = HFP_CMD_NONE; 2433 char buffer[2]; 2434 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2435 buffer[1] = 0; 2436 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2437 break; 2438 } 2439 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2440 hfp_connection->command = HFP_CMD_NONE; 2441 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2442 break; 2443 case HFP_CMD_TURN_OFF_EC_AND_NR: 2444 hfp_connection->command = HFP_CMD_NONE; 2445 2446 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2447 hfp_connection->ok_pending = 1; 2448 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2449 status = ERROR_CODE_SUCCESS; 2450 } else { 2451 hfp_connection->send_error = 1; 2452 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2453 } 2454 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2455 break; 2456 case HFP_CMD_CALL_ANSWERED: 2457 hfp_connection->command = HFP_CMD_NONE; 2458 log_info("HFP: ATA"); 2459 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2460 break; 2461 case HFP_CMD_HANG_UP_CALL: 2462 hfp_connection->command = HFP_CMD_NONE; 2463 hfp_connection->ok_pending = 1; 2464 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2465 break; 2466 case HFP_CMD_CALL_HOLD: { 2467 hfp_connection->command = HFP_CMD_NONE; 2468 hfp_connection->ok_pending = 1; 2469 2470 switch (hfp_connection->ag_call_hold_action){ 2471 case 0: 2472 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2473 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2474 break; 2475 case 1: 2476 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2477 // Where both a held and a waiting call exist, the above procedures shall apply to the 2478 // waiting call (i.e., not to the held call) in conflicting situation. 2479 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2480 break; 2481 case 2: 2482 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2483 // Where both a held and a waiting call exist, the above procedures shall apply to the 2484 // waiting call (i.e., not to the held call) in conflicting situation. 2485 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2486 break; 2487 case 3: 2488 // Adds a held call to the conversation. 2489 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2490 break; 2491 case 4: 2492 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2493 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2494 break; 2495 default: 2496 break; 2497 } 2498 hfp_connection->call_index = 0; 2499 break; 2500 } 2501 case HFP_CMD_CALL_PHONE_NUMBER: 2502 hfp_connection->command = HFP_CMD_NONE; 2503 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2504 break; 2505 case HFP_CMD_REDIAL_LAST_NUMBER: 2506 hfp_connection->command = HFP_CMD_NONE; 2507 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2508 break; 2509 case HFP_CMD_ENABLE_CLIP: 2510 hfp_connection->command = HFP_CMD_NONE; 2511 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2512 hfp_connection->ok_pending = 1; 2513 break; 2514 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2515 hfp_connection->command = HFP_CMD_NONE; 2516 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2517 hfp_connection->ok_pending = 1; 2518 break; 2519 case HFP_CMD_SET_SPEAKER_GAIN: 2520 hfp_connection->command = HFP_CMD_NONE; 2521 hfp_connection->ok_pending = 1; 2522 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2523 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2524 break; 2525 case HFP_CMD_SET_MICROPHONE_GAIN: 2526 hfp_connection->command = HFP_CMD_NONE; 2527 hfp_connection->ok_pending = 1; 2528 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2529 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2530 break; 2531 case HFP_CMD_CUSTOM_MESSAGE: 2532 hfp_connection->command = HFP_CMD_NONE; 2533 hfp_parser_reset_line_buffer(hfp_connection); 2534 log_info("Custom AT Command ID 0x%04x", hfp_connection->ag_custom_at_command_id); 2535 hfp_ag_emit_custom_command_event(hfp_connection); 2536 break; 2537 case HFP_CMD_UNKNOWN: 2538 hfp_connection->command = HFP_CMD_NONE; 2539 hfp_connection->send_error = 1; 2540 break; 2541 default: 2542 break; 2543 } 2544 } 2545 } 2546 2547 static void hfp_ag_run(void){ 2548 btstack_linked_list_iterator_t it; 2549 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2550 while (btstack_linked_list_iterator_has_next(&it)){ 2551 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2552 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2553 hfp_ag_run_for_context(hfp_connection); 2554 } 2555 } 2556 2557 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2558 hfp_connection_t * hfp_connection = NULL; 2559 switch (packet_type){ 2560 case RFCOMM_DATA_PACKET: 2561 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2562 btstack_assert(hfp_connection != NULL); 2563 2564 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2565 hfp_ag_run_for_context(hfp_connection); 2566 return; 2567 case HCI_EVENT_PACKET: 2568 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2569 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2570 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2571 btstack_assert(hfp_connection != NULL); 2572 2573 hfp_ag_run_for_context(hfp_connection); 2574 return; 2575 } 2576 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2577 break; 2578 default: 2579 break; 2580 } 2581 2582 hfp_ag_run(); 2583 } 2584 2585 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2586 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2587 hfp_ag_run(); 2588 } 2589 2590 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2591 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2592 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2593 return; 2594 } 2595 int i; 2596 hfp_ag_codecs_nr = codecs_nr; 2597 for (i=0; i < codecs_nr; i++){ 2598 hfp_ag_codecs[i] = codecs[i]; 2599 } 2600 } 2601 2602 void hfp_ag_init_supported_features(uint32_t supported_features){ 2603 hfp_ag_supported_features = supported_features; 2604 } 2605 2606 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2607 hfp_ag_indicators_nr = ag_indicators_nr; 2608 (void)memcpy(hfp_ag_indicators, ag_indicators, 2609 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2610 } 2611 2612 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2613 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2614 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2615 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2616 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2617 } 2618 2619 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2620 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2621 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2622 call_hold_services_nr * sizeof(char *)); 2623 } 2624 2625 2626 void hfp_ag_init(uint8_t rfcomm_channel_nr){ 2627 2628 hfp_init(); 2629 hfp_ag_call_hold_services_nr = 0; 2630 hfp_ag_response_and_hold_active = false; 2631 hfp_ag_indicators_nr = 0; 2632 hfp_ag_codecs_nr = 0; 2633 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2634 hfp_ag_subscriber_numbers = NULL; 2635 hfp_ag_subscriber_numbers_count = 0; 2636 2637 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2638 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2639 2640 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2641 2642 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2643 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2644 2645 hfp_gsm_init(); 2646 } 2647 2648 void hfp_ag_deinit(void){ 2649 hfp_deinit(); 2650 hfp_gsm_deinit(); 2651 2652 hfp_ag_callback = NULL; 2653 hfp_ag_supported_features = 0; 2654 hfp_ag_codecs_nr = 0; 2655 hfp_ag_indicators_nr = 0; 2656 hfp_ag_call_hold_services_nr = 0; 2657 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2658 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2659 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2660 hfp_ag_subscriber_numbers = NULL; 2661 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2662 hfp_ag_custom_call_sm_handler = NULL; 2663 } 2664 2665 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2666 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2667 } 2668 2669 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2670 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2671 if (!hfp_connection){ 2672 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2673 } 2674 2675 hfp_trigger_release_service_level_connection(hfp_connection); 2676 hfp_ag_run_for_context(hfp_connection); 2677 return ERROR_CODE_SUCCESS; 2678 } 2679 2680 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2681 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2682 if (!hfp_connection){ 2683 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2684 } 2685 2686 hfp_connection->extended_audio_gateway_error = 0; 2687 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2688 return ERROR_CODE_COMMAND_DISALLOWED; 2689 } 2690 2691 hfp_connection->extended_audio_gateway_error = error; 2692 hfp_ag_run_for_context(hfp_connection); 2693 return ERROR_CODE_SUCCESS; 2694 } 2695 2696 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2697 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2698 return ERROR_CODE_COMMAND_DISALLOWED; 2699 } 2700 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2701 return ERROR_CODE_COMMAND_DISALLOWED; 2702 } 2703 2704 hfp_connection->establish_audio_connection = 1; 2705 if (!has_codec_negotiation_feature(hfp_connection)){ 2706 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2707 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2708 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2709 // now, pick link settings 2710 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2711 #ifdef ENABLE_CC256X_ASSISTED_HFP 2712 hfp_cc256x_prepare_for_sco(hfp_connection); 2713 #endif 2714 return ERROR_CODE_SUCCESS; 2715 } 2716 2717 uint8_t i; 2718 bool codec_was_in_use = false; 2719 bool better_codec_can_be_used = false; 2720 2721 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2722 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2723 codec_was_in_use = true; 2724 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2725 better_codec_can_be_used = true; 2726 } 2727 } 2728 2729 if (!codec_was_in_use || better_codec_can_be_used){ 2730 hfp_connection->ag_send_common_codec = true; 2731 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2732 } 2733 return ERROR_CODE_SUCCESS; 2734 } 2735 2736 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2737 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2738 if (!hfp_connection){ 2739 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2740 } 2741 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2742 if (status != ERROR_CODE_SUCCESS){ 2743 return status; 2744 } 2745 hfp_ag_run_for_context(hfp_connection); 2746 return ERROR_CODE_SUCCESS; 2747 } 2748 2749 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2750 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2751 if (!hfp_connection){ 2752 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2753 } 2754 2755 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2756 return ERROR_CODE_COMMAND_DISALLOWED; 2757 } 2758 2759 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2760 if (status == ERROR_CODE_SUCCESS){ 2761 hfp_ag_run_for_context(hfp_connection); 2762 } 2763 return status; 2764 } 2765 2766 /** 2767 * @brief Enable in-band ring tone 2768 */ 2769 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2770 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2771 return; 2772 } 2773 2774 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2775 2776 btstack_linked_list_iterator_t it; 2777 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2778 while (btstack_linked_list_iterator_has_next(&it)){ 2779 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2780 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2781 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2782 hfp_ag_run_for_context(hfp_connection); 2783 } 2784 } 2785 2786 /** 2787 * @brief Called from GSM 2788 */ 2789 void hfp_ag_incoming_call(void){ 2790 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2791 } 2792 2793 void hfp_ag_outgoing_call_initiated(void) { 2794 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2795 } 2796 2797 /** 2798 * @brief number is stored. 2799 */ 2800 void hfp_ag_set_clip(uint8_t type, const char * number){ 2801 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2802 } 2803 2804 void hfp_ag_call_dropped(void){ 2805 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2806 } 2807 2808 // call from AG UI 2809 void hfp_ag_answer_incoming_call(void){ 2810 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2811 } 2812 2813 void hfp_ag_join_held_call(void){ 2814 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2815 } 2816 2817 void hfp_ag_terminate_call(void){ 2818 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2819 } 2820 2821 void hfp_ag_outgoing_call_ringing(void){ 2822 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2823 } 2824 2825 void hfp_ag_outgoing_call_established(void){ 2826 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2827 } 2828 2829 void hfp_ag_outgoing_call_rejected(void){ 2830 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2831 } 2832 2833 void hfp_ag_outgoing_call_accepted(void){ 2834 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2835 } 2836 2837 void hfp_ag_hold_incoming_call(void){ 2838 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2839 } 2840 2841 void hfp_ag_accept_held_incoming_call(void) { 2842 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2843 } 2844 2845 void hfp_ag_reject_held_incoming_call(void){ 2846 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2847 } 2848 2849 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2850 int indicator_index = get_ag_indicator_index_for_name(name); 2851 if (indicator_index < 0) return; 2852 hfp_ag_indicators[indicator_index].status = value; 2853 2854 btstack_linked_list_iterator_t it; 2855 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2856 while (btstack_linked_list_iterator_has_next(&it)){ 2857 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2858 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2859 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2860 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2861 continue; 2862 } 2863 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2864 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2865 hfp_ag_run_for_context(hfp_connection); 2866 } 2867 } 2868 2869 uint8_t hfp_ag_set_registration_status(int registration_status){ 2870 if ((registration_status < 0) || (registration_status > 1)){ 2871 return ERROR_CODE_COMMAND_DISALLOWED; 2872 } 2873 2874 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2875 2876 // if network goes away wihle a call is active: 2877 // - the call gets dropped 2878 // - we send NO CARRIER 2879 // NOTE: the CALL=0 has to be sent before NO CARRIER 2880 2881 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2882 2883 btstack_linked_list_iterator_t it; 2884 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2885 while (btstack_linked_list_iterator_has_next(&it)){ 2886 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2887 hfp_connection->ag_send_no_carrier = true; 2888 } 2889 } 2890 hfp_ag_set_ag_indicator("service", registration_status); 2891 return ERROR_CODE_SUCCESS; 2892 } 2893 2894 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2895 if ((signal_strength < 0) || (signal_strength > 5)){ 2896 return ERROR_CODE_COMMAND_DISALLOWED; 2897 } 2898 2899 hfp_ag_set_ag_indicator("signal", signal_strength); 2900 return ERROR_CODE_SUCCESS; 2901 } 2902 2903 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2904 if ((roaming_status < 0) || (roaming_status > 1)){ 2905 return ERROR_CODE_COMMAND_DISALLOWED; 2906 } 2907 2908 hfp_ag_set_ag_indicator("roam", roaming_status); 2909 return ERROR_CODE_SUCCESS; 2910 } 2911 2912 uint8_t hfp_ag_set_battery_level(int battery_level){ 2913 if ((battery_level < 0) || (battery_level > 5)){ 2914 return ERROR_CODE_COMMAND_DISALLOWED; 2915 } 2916 hfp_ag_set_ag_indicator("battchg", battery_level); 2917 return ERROR_CODE_SUCCESS; 2918 } 2919 2920 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2921 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2922 if (!hfp_connection){ 2923 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2924 } 2925 2926 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2927 return ERROR_CODE_COMMAND_DISALLOWED; 2928 } 2929 2930 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2931 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2932 if (!enhanced_vra_supported && !legacy_vra_supported){ 2933 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2934 } 2935 2936 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2937 return ERROR_CODE_COMMAND_DISALLOWED; 2938 } 2939 2940 hfp_connection->ag_activate_voice_recognition_value = 1; 2941 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2942 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2943 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2944 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2945 hfp_connection->ag_vra_send_command = true; 2946 hfp_ag_run_for_context(hfp_connection); 2947 return ERROR_CODE_SUCCESS; 2948 } 2949 2950 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2951 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2952 if (!hfp_connection){ 2953 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2954 } 2955 2956 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2957 return ERROR_CODE_COMMAND_DISALLOWED; 2958 } 2959 2960 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2961 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2962 2963 if (!enhanced_vra_supported && !legacy_vra_supported){ 2964 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2965 } 2966 2967 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2968 return ERROR_CODE_COMMAND_DISALLOWED; 2969 } 2970 2971 hfp_connection->ag_activate_voice_recognition_value = 0; 2972 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2973 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2974 hfp_connection->ag_vra_send_command = true; 2975 hfp_ag_run_for_context(hfp_connection); 2976 return ERROR_CODE_SUCCESS; 2977 } 2978 2979 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2980 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2981 if (!hfp_connection){ 2982 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2983 } 2984 2985 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2986 return ERROR_CODE_COMMAND_DISALLOWED; 2987 } 2988 2989 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2990 return ERROR_CODE_COMMAND_DISALLOWED; 2991 } 2992 2993 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2994 return ERROR_CODE_COMMAND_DISALLOWED; 2995 } 2996 2997 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2998 if (!enhanced_vra_supported ){ 2999 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3000 } 3001 3002 3003 hfp_connection->ag_vra_state = state; 3004 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 3005 hfp_connection->ag_vra_send_command = true; 3006 hfp_ag_run_for_context(hfp_connection); 3007 return ERROR_CODE_SUCCESS; 3008 } 3009 3010 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 3011 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 3012 } 3013 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 3014 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 3015 } 3016 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 3017 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 3018 } 3019 3020 3021 uint8_t hfp_ag_enhanced_voice_recognition_send_message(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state, hfp_voice_recognition_message_t msg){ 3022 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3023 if (!hfp_connection){ 3024 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3025 } 3026 3027 if (hfp_connection->emit_vra_enabled_after_audio_established){ 3028 return ERROR_CODE_COMMAND_DISALLOWED; 3029 } 3030 3031 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 3032 return ERROR_CODE_COMMAND_DISALLOWED; 3033 } 3034 3035 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 3036 return ERROR_CODE_COMMAND_DISALLOWED; 3037 } 3038 3039 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 3040 if (!enhanced_vra_supported ){ 3041 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3042 } 3043 3044 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 3045 if (!enhanced_vra_msg_supported ){ 3046 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3047 } 3048 3049 uint16_t message_len = (uint16_t) strlen(msg.text); 3050 3051 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 3052 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3053 } 3054 3055 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 3056 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3057 } 3058 3059 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 3060 hfp_connection->ag_msg = msg; 3061 hfp_connection->ag_vra_state = state; 3062 hfp_connection->ag_vra_send_command = true; 3063 hfp_ag_run_for_context(hfp_connection); 3064 3065 return ERROR_CODE_SUCCESS; 3066 } 3067 3068 3069 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3070 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3071 if (!hfp_connection){ 3072 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3073 } 3074 3075 if ((gain < 0) || (gain > 15)){ 3076 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3077 return ERROR_CODE_COMMAND_DISALLOWED; 3078 } 3079 3080 if (hfp_connection->microphone_gain != gain){ 3081 hfp_connection->microphone_gain = gain; 3082 hfp_connection->send_microphone_gain = 1; 3083 } 3084 hfp_ag_run_for_context(hfp_connection); 3085 return ERROR_CODE_SUCCESS; 3086 } 3087 3088 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3089 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3090 if (!hfp_connection){ 3091 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3092 } 3093 3094 if ((gain < 0) || (gain > 15)){ 3095 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3096 return ERROR_CODE_COMMAND_DISALLOWED; 3097 } 3098 3099 if (hfp_connection->speaker_gain != gain){ 3100 hfp_connection->speaker_gain = gain; 3101 hfp_connection->send_speaker_gain = 1; 3102 } 3103 hfp_ag_run_for_context(hfp_connection); 3104 return ERROR_CODE_SUCCESS; 3105 } 3106 3107 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3108 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3109 if (!hfp_connection){ 3110 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3111 } 3112 3113 hfp_ag_set_clip(0, number); 3114 hfp_connection->send_phone_number_for_voice_tag = 1; 3115 return ERROR_CODE_SUCCESS; 3116 } 3117 3118 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3119 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3120 if (!hfp_connection){ 3121 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3122 } 3123 3124 hfp_connection->send_error = 1; 3125 return ERROR_CODE_SUCCESS; 3126 } 3127 3128 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3129 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3130 if (!hfp_connection){ 3131 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3132 } 3133 3134 hfp_connection->ok_pending = 1; 3135 return ERROR_CODE_SUCCESS; 3136 } 3137 3138 uint8_t hfp_ag_send_unsolicited_result_code(hci_con_handle_t acl_handle, const char * unsolicited_result_code){ 3139 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3140 if (!hfp_connection){ 3141 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3142 } 3143 if (hfp_connection->send_custom_message != NULL){ 3144 return ERROR_CODE_COMMAND_DISALLOWED; 3145 } 3146 hfp_connection->send_custom_message = unsolicited_result_code; 3147 hfp_ag_run_for_context(hfp_connection); 3148 return ERROR_CODE_SUCCESS; 3149 } 3150 3151 uint8_t hfp_ag_send_command_result_code(hci_con_handle_t acl_handle, bool ok){ 3152 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3153 if (!hfp_connection){ 3154 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3155 } 3156 if (ok){ 3157 hfp_connection->ok_pending = 1; 3158 } else { 3159 hfp_connection->send_error = 1; 3160 } 3161 hfp_ag_run_for_context(hfp_connection); 3162 return ERROR_CODE_SUCCESS; 3163 } 3164 3165 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3166 hfp_ag_subscriber_numbers = numbers; 3167 hfp_ag_subscriber_numbers_count = numbers_count; 3168 } 3169 3170 void hfp_ag_clear_last_dialed_number(void){ 3171 hfp_gsm_clear_last_dialed_number(); 3172 } 3173 3174 void hfp_ag_set_last_dialed_number(const char * number){ 3175 hfp_gsm_set_last_dialed_number(number); 3176 } 3177 3178 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3179 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3180 if (!hfp_connection){ 3181 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3182 } 3183 3184 if (!hfp_connection->call_waiting_notification_enabled){ 3185 return ERROR_CODE_COMMAND_DISALLOWED; 3186 } 3187 3188 hfp_connection->ag_notify_incoming_call_waiting = 1; 3189 hfp_ag_run_for_context(hfp_connection); 3190 return ERROR_CODE_SUCCESS; 3191 } 3192 3193 void hfp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, uint8_t ability_to_reject_call, uint16_t supported_features, int wide_band_speech){ 3194 if (!name){ 3195 name = hfp_ag_default_service_name; 3196 } 3197 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3198 3199 /* 3200 * 0x01 – Ability to reject a call 3201 * 0x00 – No ability to reject a call 3202 */ 3203 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3204 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3205 3206 // Construct SupportedFeatures for SDP bitmap: 3207 // 3208 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3209 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3210 // 3211 // Wide band speech (bit 5) requires Codec negotiation 3212 // 3213 uint16_t sdp_features = supported_features & 0x1f; 3214 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3215 sdp_features |= 1 << 5; 3216 } 3217 3218 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3219 sdp_features |= 1 << 6; 3220 } 3221 3222 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3223 sdp_features |= 1 << 7; 3224 } 3225 3226 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3227 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3228 } 3229 3230 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3231 btstack_assert(callback != NULL); 3232 3233 hfp_ag_callback = callback; 3234 hfp_set_ag_callback(callback); 3235 } 3236 3237 void hfp_ag_register_custom_call_sm_handler(bool (*handler)(hfp_ag_call_event_t event)){ 3238 hfp_ag_custom_call_sm_handler = handler; 3239 } 3240 3241 void hfp_ag_register_custom_at_command(hfp_custom_at_command_t * custom_at_command){ 3242 hfp_register_custom_ag_command(custom_at_command); 3243 } 3244