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->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 && (hfp_sco_setup_active() == false)){ 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->state = HFP_W4_SCO_CONNECTED; 1126 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1127 return 1; 1128 } 1129 1130 // run codecs exchange 1131 int sent = codecs_exchange_state_machine(hfp_connection); 1132 if (sent) return 1; 1133 1134 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1135 if (hfp_sco_setup_active()) return 0; 1136 if (hci_can_send_command_packet_now() == false) return 0; 1137 if (hfp_connection->establish_audio_connection){ 1138 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1139 hfp_connection->establish_audio_connection = 0; 1140 hfp_setup_synchronous_connection(hfp_connection); 1141 return 1; 1142 } 1143 return 0; 1144 } 1145 1146 static void hfp_ag_set_callsetup_indicator(void){ 1147 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1148 if (!indicator){ 1149 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1150 return; 1151 }; 1152 indicator->status = hfp_gsm_callsetup_status(); 1153 } 1154 1155 static void hfp_ag_set_callheld_indicator(void){ 1156 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1157 if (!indicator){ 1158 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1159 return; 1160 }; 1161 indicator->status = hfp_gsm_callheld_status(); 1162 } 1163 1164 // 1165 // transition implementations for hfp_ag_call_state_machine 1166 // 1167 1168 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1169 if (use_in_band_tone()){ 1170 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1171 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1172 } else { 1173 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1174 } 1175 } 1176 1177 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1178 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1179 } 1180 1181 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1182 hfp_connection->ag_ring = 0; 1183 hfp_connection->ag_send_clip = 0; 1184 } 1185 1186 1187 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1188 btstack_linked_list_iterator_t it; 1189 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1190 while (btstack_linked_list_iterator_has_next(&it)){ 1191 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1192 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1193 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1194 1195 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1196 hfp_ag_run_for_context(hfp_connection); 1197 } 1198 } 1199 1200 static void hfp_ag_trigger_ring_and_clip(void) { 1201 btstack_linked_list_iterator_t it; 1202 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1203 while (btstack_linked_list_iterator_has_next(&it)){ 1204 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1205 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1206 switch (hfp_connection->call_state){ 1207 case HFP_CALL_INCOMING_RINGING: 1208 case HFP_CALL_OUTGOING_RINGING: 1209 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1210 // Queue RING on this connection 1211 hfp_connection->ag_ring = 1; 1212 1213 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1214 // "If the calling subscriber number information is available from the network, the AG shall issue the 1215 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1216 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1217 1218 // trigger next message 1219 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1220 break; 1221 default: 1222 break; 1223 } 1224 } 1225 } 1226 1227 // trigger RING and CLIP messages on connections that are ringing 1228 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1229 hfp_ag_trigger_ring_and_clip(); 1230 1231 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1232 btstack_run_loop_add_timer(timer); 1233 } 1234 1235 static void hfp_ag_ring_timeout_stop(void){ 1236 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1237 } 1238 1239 static void hfp_ag_start_ringing(void){ 1240 // setup ring timer 1241 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1242 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1243 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1244 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1245 1246 // emit start ringing 1247 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1248 1249 // send initial RING + CLIP 1250 hfp_ag_trigger_ring_and_clip(); 1251 } 1252 1253 static void hfp_ag_stop_ringing(void){ 1254 hfp_ag_ring_timeout_stop(); 1255 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1256 1257 btstack_linked_list_iterator_t it; 1258 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1259 while (btstack_linked_list_iterator_has_next(&it)){ 1260 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1261 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1262 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1263 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1264 hfp_ag_hf_stop_ringing(hfp_connection); 1265 } 1266 } 1267 1268 static void hfp_ag_trigger_incoming_call_idle(void){ 1269 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1270 if (indicator_index < 0) return; 1271 1272 // update callsetup state in connections 1273 btstack_linked_list_iterator_t it; 1274 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1275 while (btstack_linked_list_iterator_has_next(&it)){ 1276 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1277 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1278 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1279 1280 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1281 1282 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1283 1284 hfp_ag_run_for_context(hfp_connection); 1285 } 1286 1287 // start local ringing - started after connection state has been updated 1288 hfp_ag_start_ringing(); 1289 } 1290 1291 static void hfp_ag_trigger_outgoing_call(void){ 1292 btstack_linked_list_iterator_t it; 1293 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1294 while (btstack_linked_list_iterator_has_next(&it)){ 1295 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1296 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1297 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1298 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1299 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1300 } 1301 } 1302 } 1303 1304 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1305 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1306 1307 // trigger callsetup to be 1308 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1309 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1310 1311 int indicator_index ; 1312 1313 hfp_ag_set_callsetup_indicator(); 1314 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1315 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1316 1317 // put current call on hold if active 1318 if (put_call_on_hold){ 1319 log_info("AG putting current call on hold for new outgoing call"); 1320 hfp_ag_set_callheld_indicator(); 1321 indicator_index = get_ag_indicator_index_for_name("callheld"); 1322 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1323 } 1324 1325 // start audio if needed 1326 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1327 } 1328 1329 static void hfp_ag_transfer_indicator(const char * name){ 1330 int indicator_index = get_ag_indicator_index_for_name(name); 1331 if (indicator_index < 0) return; 1332 1333 btstack_linked_list_iterator_t it; 1334 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1335 while (btstack_linked_list_iterator_has_next(&it)){ 1336 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1337 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1338 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1339 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1340 hfp_ag_run_for_context(hfp_connection); 1341 } 1342 } 1343 1344 static void hfp_ag_transfer_callsetup_state(void){ 1345 hfp_ag_transfer_indicator("callsetup"); 1346 } 1347 1348 static void hfp_ag_transfer_call_state(void){ 1349 hfp_ag_transfer_indicator("call"); 1350 } 1351 1352 static void hfp_ag_transfer_callheld_state(void){ 1353 hfp_ag_transfer_indicator("callheld"); 1354 } 1355 1356 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1357 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1358 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1359 1360 hfp_ag_stop_ringing(); 1361 1362 btstack_linked_list_iterator_t it; 1363 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1364 while (btstack_linked_list_iterator_has_next(&it)){ 1365 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1366 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1367 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1368 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1369 1370 if (hfp_connection == source){ 1371 1372 if (use_in_band_tone()){ 1373 hfp_connection->call_state = HFP_CALL_ACTIVE; 1374 } else { 1375 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1376 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1377 } 1378 1379 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1380 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1381 1382 } else { 1383 hfp_connection->call_state = HFP_CALL_IDLE; 1384 } 1385 hfp_ag_run_for_context(hfp_connection); 1386 } 1387 } 1388 1389 static void hfp_ag_ag_accept_call(void){ 1390 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1391 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1392 1393 hfp_ag_stop_ringing(); 1394 1395 btstack_linked_list_iterator_t it; 1396 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1397 while (btstack_linked_list_iterator_has_next(&it)){ 1398 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1399 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1400 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1401 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1402 1403 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1404 1405 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1406 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1407 1408 hfp_ag_run_for_context(hfp_connection); 1409 break; // only single 1410 } 1411 } 1412 1413 static void hfp_ag_trigger_reject_call(void){ 1414 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1415 1416 hfp_ag_stop_ringing(); 1417 1418 btstack_linked_list_iterator_t it; 1419 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1420 while (btstack_linked_list_iterator_has_next(&it)){ 1421 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1422 if (connection->local_role != HFP_ROLE_AG) continue; 1423 1424 switch (connection->call_state){ 1425 case HFP_CALL_INCOMING_RINGING: 1426 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1427 case HFP_CALL_OUTGOING_RINGING: 1428 case HFP_CALL_OUTGOING_INITIATED: 1429 case HFP_CALL_OUTGOING_DIALING: 1430 break; 1431 default: 1432 continue; 1433 } 1434 1435 connection->call_state = HFP_CALL_IDLE; 1436 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1437 1438 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1439 connection->release_audio_connection = 1; 1440 } 1441 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1442 hfp_ag_run_for_context(connection); 1443 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1444 } 1445 } 1446 1447 static void hfp_ag_trigger_terminate_call(void){ 1448 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1449 1450 // no ringing during call 1451 1452 btstack_linked_list_iterator_t it; 1453 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1454 while (btstack_linked_list_iterator_has_next(&it)){ 1455 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1456 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1457 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1458 1459 hfp_connection->call_state = HFP_CALL_IDLE; 1460 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1461 1462 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1463 hfp_connection->release_audio_connection = 1; 1464 } 1465 1466 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1467 hfp_ag_run_for_context(hfp_connection); 1468 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1469 } 1470 } 1471 1472 static void hfp_ag_set_call_indicator(void){ 1473 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1474 if (!indicator){ 1475 log_error("hfp_ag_set_call_state: call indicator is missing"); 1476 return; 1477 }; 1478 indicator->status = hfp_gsm_call_status(); 1479 } 1480 1481 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1482 btstack_linked_list_iterator_t it; 1483 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1484 while (btstack_linked_list_iterator_has_next(&it)){ 1485 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1486 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1487 if (hfp_connection->call_state == call_state) return hfp_connection; 1488 } 1489 return NULL; 1490 } 1491 1492 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1493 btstack_linked_list_iterator_t it; 1494 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1495 while (btstack_linked_list_iterator_has_next(&it)){ 1496 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1497 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1498 hfp_connection->send_response_and_hold_status = state + 1; 1499 } 1500 } 1501 1502 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1503 int indicator_index; 1504 switch (hfp_connection->call_state){ 1505 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1506 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1507 // we got event: audio hfp_connection established 1508 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1509 break; 1510 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1511 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1512 // we got event: audio hfp_connection established 1513 hfp_connection->call_state = HFP_CALL_ACTIVE; 1514 break; 1515 case HFP_CALL_W2_SEND_CALL_WAITING: 1516 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1517 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1518 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1519 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1520 break; 1521 default: 1522 break; 1523 } 1524 return 0; 1525 } 1526 1527 // functions extracted from hfp_ag_call_sm below 1528 static void hfp_ag_handle_reject_outgoing_call(void){ 1529 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1530 if (!hfp_connection){ 1531 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1532 return; 1533 } 1534 1535 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1536 hfp_connection->call_state = HFP_CALL_IDLE; 1537 hfp_connection->send_error = 1; 1538 hfp_ag_run_for_context(hfp_connection); 1539 } 1540 1541 // hfp_connection is used to identify originating HF 1542 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1543 1544 // allow to intercept call statemachine events 1545 if (hfp_ag_custom_call_sm_handler != NULL){ 1546 bool handle_event = (*hfp_ag_custom_call_sm_handler)(event); 1547 if (!handle_event) return; 1548 } 1549 1550 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1551 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1552 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1553 1554 switch (event){ 1555 case HFP_AG_INCOMING_CALL: 1556 switch (hfp_gsm_call_status()){ 1557 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1558 switch (hfp_gsm_callsetup_status()){ 1559 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1560 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1561 hfp_ag_set_callsetup_indicator(); 1562 hfp_ag_trigger_incoming_call_idle(); 1563 log_info("AG rings"); 1564 break; 1565 default: 1566 break; 1567 } 1568 break; 1569 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1570 switch (hfp_gsm_callsetup_status()){ 1571 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1572 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1573 hfp_ag_set_callsetup_indicator(); 1574 hfp_ag_trigger_incoming_call_during_active_one(); 1575 log_info("AG call waiting"); 1576 break; 1577 default: 1578 break; 1579 } 1580 break; 1581 default: 1582 break; 1583 } 1584 break; 1585 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1586 switch (hfp_gsm_call_status()){ 1587 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1588 switch (hfp_gsm_callsetup_status()){ 1589 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1590 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1591 hfp_ag_set_call_indicator(); 1592 hfp_ag_set_callsetup_indicator(); 1593 hfp_ag_ag_accept_call(); 1594 log_info("AG answers call, accept call by GSM"); 1595 break; 1596 default: 1597 break; 1598 } 1599 break; 1600 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1601 switch (hfp_gsm_callsetup_status()){ 1602 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1603 log_info("AG: current call is placed on hold, incoming call gets active"); 1604 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1605 hfp_ag_set_callsetup_indicator(); 1606 hfp_ag_set_callheld_indicator(); 1607 hfp_ag_transfer_callsetup_state(); 1608 hfp_ag_transfer_callheld_state(); 1609 break; 1610 default: 1611 break; 1612 } 1613 break; 1614 default: 1615 break; 1616 } 1617 break; 1618 1619 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1620 switch (hfp_gsm_call_status()){ 1621 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1622 switch (hfp_gsm_callheld_status()){ 1623 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1624 log_info("AG: joining held call with active call"); 1625 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1626 hfp_ag_set_callheld_indicator(); 1627 hfp_ag_transfer_callheld_state(); 1628 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1629 break; 1630 default: 1631 break; 1632 } 1633 break; 1634 default: 1635 break; 1636 } 1637 break; 1638 1639 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1640 switch (hfp_gsm_call_status()){ 1641 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1642 switch (hfp_gsm_callsetup_status()){ 1643 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1644 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1645 hfp_ag_set_callsetup_indicator(); 1646 hfp_ag_set_call_indicator(); 1647 hfp_ag_hf_accept_call(hfp_connection); 1648 hfp_connection->ok_pending = 1; 1649 log_info("HF answers call, accept call by GSM"); 1650 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1651 break; 1652 default: 1653 break; 1654 } 1655 break; 1656 default: 1657 break; 1658 } 1659 break; 1660 1661 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1662 switch (hfp_gsm_call_status()){ 1663 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1664 switch (hfp_gsm_callsetup_status()){ 1665 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1666 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1667 hfp_ag_response_and_hold_active = true; 1668 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1669 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1670 // as with regular call 1671 hfp_ag_set_call_indicator(); 1672 hfp_ag_set_callsetup_indicator(); 1673 hfp_ag_ag_accept_call(); 1674 log_info("AG response and hold - hold by AG"); 1675 break; 1676 default: 1677 break; 1678 } 1679 break; 1680 default: 1681 break; 1682 } 1683 break; 1684 1685 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1686 switch (hfp_gsm_call_status()){ 1687 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1688 switch (hfp_gsm_callsetup_status()){ 1689 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1690 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1691 hfp_ag_response_and_hold_active = true; 1692 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1693 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1694 // as with regular call 1695 hfp_ag_set_call_indicator(); 1696 hfp_ag_set_callsetup_indicator(); 1697 hfp_ag_hf_accept_call(hfp_connection); 1698 log_info("AG response and hold - hold by HF"); 1699 break; 1700 default: 1701 break; 1702 } 1703 break; 1704 default: 1705 break; 1706 } 1707 break; 1708 1709 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1710 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1711 if (!hfp_ag_response_and_hold_active) break; 1712 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1713 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1714 hfp_ag_response_and_hold_active = false; 1715 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1716 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1717 log_info("Held Call accepted and active"); 1718 break; 1719 1720 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1721 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1722 if (!hfp_ag_response_and_hold_active) break; 1723 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1724 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1725 hfp_ag_response_and_hold_active = false; 1726 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1727 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1728 // from terminate by ag 1729 hfp_ag_set_call_indicator(); 1730 hfp_ag_trigger_terminate_call(); 1731 break; 1732 1733 case HFP_AG_TERMINATE_CALL_BY_HF: 1734 switch (hfp_gsm_call_status()){ 1735 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1736 switch (hfp_gsm_callsetup_status()){ 1737 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1738 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1739 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1740 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1741 hfp_ag_set_callsetup_indicator(); 1742 hfp_ag_transfer_callsetup_state(); 1743 hfp_ag_trigger_reject_call(); 1744 log_info("HF Rejected Incoming call, AG terminate call"); 1745 break; 1746 default: 1747 break; 1748 } 1749 break; 1750 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1751 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1752 hfp_ag_set_callsetup_indicator(); 1753 hfp_ag_set_call_indicator(); 1754 hfp_ag_trigger_terminate_call(); 1755 log_info("AG terminate call"); 1756 break; 1757 default: 1758 break; 1759 } 1760 break; 1761 1762 case HFP_AG_TERMINATE_CALL_BY_AG: 1763 switch (hfp_gsm_call_status()){ 1764 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1765 switch (hfp_gsm_callsetup_status()){ 1766 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1767 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1768 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1769 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1770 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1771 hfp_ag_set_callsetup_indicator(); 1772 hfp_ag_trigger_reject_call(); 1773 log_info("AG Rejected Incoming call, AG terminate call"); 1774 break; 1775 default: 1776 break; 1777 } 1778 break; 1779 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1780 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1781 hfp_ag_set_callsetup_indicator(); 1782 hfp_ag_set_call_indicator(); 1783 hfp_ag_trigger_terminate_call(); 1784 log_info("AG terminate call"); 1785 break; 1786 default: 1787 break; 1788 } 1789 break; 1790 case HFP_AG_CALL_DROPPED: 1791 switch (hfp_gsm_call_status()){ 1792 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1793 switch (hfp_gsm_callsetup_status()){ 1794 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1795 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1796 hfp_ag_stop_ringing(); 1797 break; 1798 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1799 log_info("Outgoing call interrupted\n"); 1800 break; 1801 default: 1802 break; 1803 } 1804 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1805 hfp_ag_set_callsetup_indicator(); 1806 hfp_ag_transfer_callsetup_state(); 1807 hfp_ag_trigger_terminate_call(); 1808 break; 1809 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1810 if (hfp_ag_response_and_hold_active) { 1811 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1812 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1813 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1814 } 1815 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1816 hfp_ag_set_callsetup_indicator(); 1817 hfp_ag_set_call_indicator(); 1818 hfp_ag_trigger_terminate_call(); 1819 log_info("AG notify call dropped"); 1820 break; 1821 default: 1822 break; 1823 } 1824 break; 1825 1826 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1827 // directly reject call if number of free slots is exceeded 1828 if (!hfp_gsm_call_possible()){ 1829 hfp_connection->send_error = 1; 1830 hfp_ag_run_for_context(hfp_connection); 1831 break; 1832 } 1833 1834 // note: number not used currently 1835 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1836 1837 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1838 1839 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1840 break; 1841 1842 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1843 // directly reject call if number of free slots is exceeded 1844 if (!hfp_gsm_call_possible()) { 1845 // TODO: no error for user 1846 break; 1847 } 1848 switch (hfp_gsm_call_status()) { 1849 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1850 switch (hfp_gsm_callsetup_status()) { 1851 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1852 // note: number not used currently 1853 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1854 // init call state for all connections 1855 hfp_ag_trigger_outgoing_call(); 1856 // get first one and accept call 1857 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1858 if (hfp_connection) { 1859 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1860 } 1861 break; 1862 default: 1863 // TODO: no error for user 1864 break; 1865 } 1866 break; 1867 default: 1868 // TODO: no error for user 1869 break; 1870 } 1871 break; 1872 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1873 // directly reject call if number of free slots is exceeded 1874 if (!hfp_gsm_call_possible()){ 1875 hfp_connection->send_error = 1; 1876 hfp_ag_run_for_context(hfp_connection); 1877 break; 1878 } 1879 1880 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1881 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1882 1883 log_info("Redial last number"); 1884 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1885 1886 if (strlen(last_dialed_number) > 0){ 1887 log_info("Last number exists: accept call"); 1888 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1889 } else { 1890 log_info("log_infoLast number missing: reject call"); 1891 hfp_ag_handle_reject_outgoing_call(); 1892 } 1893 break; 1894 } 1895 case HFP_AG_OUTGOING_CALL_REJECTED: 1896 hfp_ag_handle_reject_outgoing_call(); 1897 break; 1898 1899 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1900 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1901 if (!hfp_connection){ 1902 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1903 break; 1904 } 1905 1906 hfp_connection->ok_pending = 1; 1907 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1908 break; 1909 } 1910 case HFP_AG_OUTGOING_CALL_RINGING: 1911 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1912 if (!hfp_connection){ 1913 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1914 break; 1915 } 1916 1917 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1918 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1919 hfp_ag_set_callsetup_indicator(); 1920 hfp_ag_transfer_callsetup_state(); 1921 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1922 break; 1923 1924 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1925 // get outgoing call 1926 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1927 if (!hfp_connection){ 1928 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1929 } 1930 if (!hfp_connection){ 1931 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1932 break; 1933 } 1934 1935 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1936 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1937 hfp_connection->call_state = HFP_CALL_ACTIVE; 1938 hfp_ag_set_callsetup_indicator(); 1939 hfp_ag_set_call_indicator(); 1940 hfp_ag_transfer_call_state(); 1941 hfp_ag_transfer_callsetup_state(); 1942 if (callheld_status_call_on_hold_and_no_active_calls){ 1943 hfp_ag_set_callheld_indicator(); 1944 hfp_ag_transfer_callheld_state(); 1945 } 1946 hfp_ag_hf_stop_ringing(hfp_connection); 1947 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1948 break; 1949 } 1950 1951 case HFP_AG_CALL_HOLD_USER_BUSY: 1952 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1953 hfp_ag_set_callsetup_indicator(); 1954 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1955 hfp_connection->call_state = HFP_CALL_ACTIVE; 1956 log_info("AG: Call Waiting, User Busy"); 1957 break; 1958 1959 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1960 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1961 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1962 1963 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1964 if (call_held || call_setup_in_progress){ 1965 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1966 0, NULL); 1967 1968 } 1969 1970 if (call_setup_in_progress){ 1971 log_info("AG: Call Dropped, Accept new call"); 1972 hfp_ag_set_callsetup_indicator(); 1973 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1974 } else { 1975 log_info("AG: Call Dropped, Resume held call"); 1976 } 1977 if (call_held){ 1978 hfp_ag_set_callheld_indicator(); 1979 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1980 } 1981 1982 hfp_connection->call_state = HFP_CALL_ACTIVE; 1983 break; 1984 } 1985 1986 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1987 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1988 // only update if callsetup changed 1989 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1990 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1991 NULL); 1992 1993 if (call_setup_in_progress){ 1994 log_info("AG: Call on Hold, Accept new call"); 1995 hfp_ag_set_callsetup_indicator(); 1996 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1997 } else { 1998 log_info("AG: Swap calls"); 1999 } 2000 2001 hfp_ag_set_callheld_indicator(); 2002 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 2003 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2004 hfp_connection->call_state = HFP_CALL_ACTIVE; 2005 break; 2006 } 2007 2008 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 2009 // Adds a held call to the conversation. 2010 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 2011 log_info("AG: Join 3-way-call"); 2012 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 2013 hfp_ag_set_callheld_indicator(); 2014 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2015 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 2016 } 2017 hfp_connection->call_state = HFP_CALL_ACTIVE; 2018 break; 2019 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 2020 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 2021 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 2022 log_info("AG: Transfer call -> Connect two calls and disconnect"); 2023 hfp_ag_set_call_indicator(); 2024 hfp_ag_set_callheld_indicator(); 2025 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 2026 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2027 hfp_connection->call_state = HFP_CALL_IDLE; 2028 break; 2029 2030 default: 2031 break; 2032 } 2033 2034 2035 } 2036 2037 2038 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2039 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2040 if (!active_call) return; 2041 2042 int idx = active_call->index; 2043 hfp_enhanced_call_dir_t dir = active_call->direction; 2044 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2045 hfp_enhanced_call_mode_t mode = active_call->mode; 2046 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2047 uint8_t type = active_call->clip_type; 2048 char * number = active_call->clip_number; 2049 2050 char buffer[100]; 2051 // TODO: check length of a buffer, to fit the MTU 2052 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2053 if (number){ 2054 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2055 } 2056 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2057 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, 2058 mode, mpty, type, number); 2059 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2060 } 2061 2062 // sends pending command, returns if command was sent 2063 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2064 if (hfp_connection->send_status_of_current_calls){ 2065 hfp_connection->ok_pending = 0; 2066 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2067 hfp_connection->next_call_index++; 2068 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2069 return 1; 2070 } else { 2071 // 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 2072 hfp_connection->next_call_index = 0; 2073 hfp_connection->ok_pending = 1; 2074 hfp_connection->send_status_of_current_calls = 0; 2075 } 2076 } 2077 2078 if (hfp_connection->ag_notify_incoming_call_waiting){ 2079 hfp_connection->ag_notify_incoming_call_waiting = 0; 2080 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2081 return 1; 2082 } 2083 2084 if (hfp_connection->send_error){ 2085 hfp_connection->send_error = 0; 2086 hfp_connection->command = HFP_CMD_NONE; 2087 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2088 return 1; 2089 } 2090 2091 // note: before update AG indicators and ok_pending 2092 if (hfp_connection->send_response_and_hold_status){ 2093 int status = hfp_connection->send_response_and_hold_status - 1; 2094 hfp_connection->send_response_and_hold_status = 0; 2095 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2096 return 1; 2097 } 2098 2099 // note: before ok_pending and send_error to allow for unsolicited result on custom command 2100 if (hfp_connection->send_custom_message != NULL){ 2101 const char * message = hfp_connection->send_custom_message; 2102 hfp_connection->send_custom_message = NULL; 2103 send_str_over_rfcomm(hfp_connection->rfcomm_cid, message); 2104 hfp_emit_event(hfp_connection, HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT, ERROR_CODE_SUCCESS); 2105 return 1; 2106 } 2107 2108 if (hfp_connection->ok_pending){ 2109 hfp_connection->ok_pending = 0; 2110 hfp_connection->command = HFP_CMD_NONE; 2111 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2112 return 1; 2113 } 2114 2115 // update AG indicators only if enabled by AT+CMER=3,0,0,1 2116 if ((hfp_connection->enable_status_update_for_ag_indicators == 1) && (hfp_connection->ag_indicators_status_update_bitmap != 0)){ 2117 uint16_t i; 2118 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2119 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2120 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2121 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2122 return 1; 2123 } 2124 } 2125 } 2126 2127 if (hfp_connection->ag_send_no_carrier){ 2128 hfp_connection->ag_send_no_carrier = false; 2129 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2130 return 1; 2131 } 2132 2133 if (hfp_connection->send_phone_number_for_voice_tag){ 2134 hfp_connection->send_phone_number_for_voice_tag = 0; 2135 hfp_connection->command = HFP_CMD_NONE; 2136 hfp_connection->ok_pending = 1; 2137 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2138 return 1; 2139 } 2140 2141 if (hfp_connection->send_subscriber_number){ 2142 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2143 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2144 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2145 } else { 2146 hfp_connection->send_subscriber_number = 0; 2147 hfp_connection->next_subscriber_number_to_send = 0; 2148 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2149 } 2150 hfp_connection->command = HFP_CMD_NONE; 2151 return 1; 2152 } 2153 2154 if (hfp_connection->send_microphone_gain){ 2155 hfp_connection->send_microphone_gain = 0; 2156 hfp_connection->command = HFP_CMD_NONE; 2157 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2158 return 1; 2159 } 2160 2161 if (hfp_connection->send_speaker_gain){ 2162 hfp_connection->send_speaker_gain = 0; 2163 hfp_connection->command = HFP_CMD_NONE; 2164 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2165 return 1; 2166 } 2167 2168 if (hfp_connection->send_ag_status_indicators){ 2169 hfp_connection->send_ag_status_indicators = 0; 2170 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2171 return 1; 2172 } 2173 2174 return 0; 2175 } 2176 2177 // sends pending command, returns if command was sent 2178 static int hfp_ag_run_ring_and_clip(hfp_connection_t *hfp_connection){ 2179 // delay RING/CLIP until audio connection has been established for incoming calls 2180 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2181 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2182 if (hfp_connection->ag_ring){ 2183 hfp_connection->ag_ring = 0; 2184 hfp_connection->command = HFP_CMD_NONE; 2185 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2186 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2187 return 1; 2188 } 2189 2190 if (hfp_connection->ag_send_clip){ 2191 hfp_connection->ag_send_clip = 0; 2192 hfp_connection->command = HFP_CMD_NONE; 2193 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2194 return 1; 2195 } 2196 } 2197 return 0; 2198 } 2199 2200 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2201 2202 btstack_assert(hfp_connection != NULL); 2203 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2204 2205 // during SDP query, RFCOMM CID is not set 2206 if (hfp_connection->rfcomm_cid == 0) return; 2207 2208 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2209 hfp_connection->emit_vra_enabled_after_audio_established = false; 2210 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2211 } 2212 2213 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2214 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2215 hfp_connection->release_audio_connection = 0; 2216 gap_disconnect(hfp_connection->sco_handle); 2217 return; 2218 } 2219 2220 // configure NBS/WBS if needed using vendor-specific HCI commands 2221 if (hci_can_send_command_packet_now()) { 2222 #ifdef ENABLE_CC256X_ASSISTED_HFP 2223 // WBS Disassociate 2224 if (hfp_connection->cc256x_send_wbs_disassociate){ 2225 hfp_connection->cc256x_send_wbs_disassociate = false; 2226 hci_send_cmd(&hci_ti_wbs_disassociate); 2227 return; 2228 } 2229 // Write Codec Config 2230 if (hfp_connection->cc256x_send_write_codec_config){ 2231 hfp_connection->cc256x_send_write_codec_config = false; 2232 hfp_cc256x_write_codec_config(hfp_connection); 2233 return; 2234 } 2235 // WBS Associate 2236 if (hfp_connection->cc256x_send_wbs_associate){ 2237 hfp_connection->cc256x_send_wbs_associate = false; 2238 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2239 return; 2240 } 2241 #endif 2242 #ifdef ENABLE_BCM_PCM_WBS 2243 // Enable WBS 2244 if (hfp_connection->bcm_send_enable_wbs){ 2245 hfp_connection->bcm_send_enable_wbs = false; 2246 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2247 return; 2248 } 2249 // Write I2S/PCM params 2250 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2251 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2252 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2253 return; 2254 } 2255 // Disable WBS 2256 if (hfp_connection->bcm_send_disable_wbs){ 2257 hfp_connection->bcm_send_disable_wbs = false; 2258 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2259 return; 2260 } 2261 #endif 2262 #ifdef ENABLE_RTK_PCM_WBS 2263 // Configure CVSD vs. mSBC 2264 if (hfp_connection->rtk_send_sco_config){ 2265 hfp_connection->rtk_send_sco_config = false; 2266 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2267 log_info("RTK SCO: 16k + mSBC"); 2268 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2269 } else { 2270 log_info("RTK SCO: 16k + CVSD"); 2271 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2272 } 2273 return; 2274 } 2275 #endif 2276 } 2277 2278 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2279 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2280 hfp_finalize_connection_context(hfp_connection); 2281 return; 2282 } 2283 #endif 2284 2285 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2286 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2287 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2288 return; 2289 } 2290 2291 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2292 2293 if (!cmd_sent){ 2294 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2295 } 2296 2297 if (!cmd_sent){ 2298 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2299 } 2300 2301 if (!cmd_sent){ 2302 cmd_sent = call_setup_state_machine(hfp_connection); 2303 } 2304 2305 if (!cmd_sent){ 2306 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2307 } 2308 2309 if (!cmd_sent){ 2310 cmd_sent = hfp_ag_run_ring_and_clip(hfp_connection); 2311 } 2312 2313 if (!cmd_sent){ 2314 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2315 } 2316 2317 // disconnect 2318 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2319 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2320 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2321 } 2322 2323 if (cmd_sent){ 2324 hfp_connection->command = HFP_CMD_NONE; 2325 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2326 } 2327 } 2328 2329 static int hfp_parser_is_end_of_line(uint8_t byte){ 2330 return (byte == '\n') || (byte == '\r'); 2331 } 2332 2333 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2334 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2335 if (size < 1) return; 2336 uint8_t status = ERROR_CODE_SUCCESS; 2337 2338 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2339 #ifdef ENABLE_HFP_AT_MESSAGES 2340 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2341 #endif 2342 2343 // process messages byte-wise 2344 int pos; 2345 for (pos = 0; pos < size ; pos++){ 2346 hfp_parse(hfp_connection, packet[pos], 0); 2347 2348 // parse until end of line 2349 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2350 2351 hfp_generic_status_indicator_t * indicator; 2352 switch(hfp_connection->command){ 2353 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2354 hfp_connection->command = HFP_CMD_NONE; 2355 hfp_connection->ag_vra_requested_by_hf = true; 2356 break; 2357 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2358 hfp_connection->command = HFP_CMD_NONE; 2359 if (hfp_ag_response_and_hold_active){ 2360 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2361 } 2362 hfp_connection->ok_pending = 1; 2363 break; 2364 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2365 hfp_connection->command = HFP_CMD_NONE; 2366 switch(hfp_connection->ag_response_and_hold_action){ 2367 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2368 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2369 break; 2370 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2371 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2372 break; 2373 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2374 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2375 break; 2376 default: 2377 break; 2378 } 2379 hfp_connection->ok_pending = 1; 2380 break; 2381 case HFP_CMD_HF_INDICATOR_STATUS: 2382 hfp_connection->command = HFP_CMD_NONE; 2383 2384 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2385 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2386 switch (indicator->uuid){ 2387 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2388 if (hfp_connection->parser_indicator_value > 1) { 2389 hfp_connection->send_error = 1; 2390 break; 2391 } 2392 hfp_connection->ok_pending = 1; 2393 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2394 break; 2395 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2396 if (hfp_connection->parser_indicator_value > 100){ 2397 hfp_connection->send_error = 1; 2398 break; 2399 } 2400 hfp_connection->ok_pending = 1; 2401 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2402 break; 2403 default: 2404 hfp_connection->send_error = 1; 2405 break; 2406 } 2407 } else { 2408 hfp_connection->send_error = 1; 2409 } 2410 break; 2411 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2412 // expected by SLC state machine 2413 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2414 hfp_connection->send_ag_indicators_segment = 0; 2415 hfp_connection->send_ag_status_indicators = 1; 2416 break; 2417 case HFP_CMD_LIST_CURRENT_CALLS: 2418 hfp_connection->command = HFP_CMD_NONE; 2419 hfp_connection->next_call_index = 0; 2420 hfp_connection->send_status_of_current_calls = 1; 2421 break; 2422 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2423 hfp_connection->command = HFP_CMD_NONE; 2424 if (hfp_ag_subscriber_numbers_count == 0){ 2425 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2426 break; 2427 } 2428 hfp_connection->next_subscriber_number_to_send = 0; 2429 hfp_connection->send_subscriber_number = 1; 2430 break; 2431 case HFP_CMD_TRANSMIT_DTMF_CODES: 2432 { 2433 hfp_connection->command = HFP_CMD_NONE; 2434 char buffer[2]; 2435 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2436 buffer[1] = 0; 2437 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2438 break; 2439 } 2440 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2441 hfp_connection->command = HFP_CMD_NONE; 2442 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2443 break; 2444 case HFP_CMD_TURN_OFF_EC_AND_NR: 2445 hfp_connection->command = HFP_CMD_NONE; 2446 2447 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2448 hfp_connection->ok_pending = 1; 2449 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2450 status = ERROR_CODE_SUCCESS; 2451 } else { 2452 hfp_connection->send_error = 1; 2453 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2454 } 2455 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2456 break; 2457 case HFP_CMD_CALL_ANSWERED: 2458 hfp_connection->command = HFP_CMD_NONE; 2459 log_info("HFP: ATA"); 2460 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2461 break; 2462 case HFP_CMD_HANG_UP_CALL: 2463 hfp_connection->command = HFP_CMD_NONE; 2464 hfp_connection->ok_pending = 1; 2465 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2466 break; 2467 case HFP_CMD_CALL_HOLD: { 2468 hfp_connection->command = HFP_CMD_NONE; 2469 hfp_connection->ok_pending = 1; 2470 2471 switch (hfp_connection->ag_call_hold_action){ 2472 case 0: 2473 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2474 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2475 break; 2476 case 1: 2477 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2478 // Where both a held and a waiting call exist, the above procedures shall apply to the 2479 // waiting call (i.e., not to the held call) in conflicting situation. 2480 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2481 break; 2482 case 2: 2483 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2484 // Where both a held and a waiting call exist, the above procedures shall apply to the 2485 // waiting call (i.e., not to the held call) in conflicting situation. 2486 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2487 break; 2488 case 3: 2489 // Adds a held call to the conversation. 2490 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2491 break; 2492 case 4: 2493 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2494 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2495 break; 2496 default: 2497 break; 2498 } 2499 hfp_connection->call_index = 0; 2500 break; 2501 } 2502 case HFP_CMD_CALL_PHONE_NUMBER: 2503 hfp_connection->command = HFP_CMD_NONE; 2504 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2505 break; 2506 case HFP_CMD_REDIAL_LAST_NUMBER: 2507 hfp_connection->command = HFP_CMD_NONE; 2508 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2509 break; 2510 case HFP_CMD_ENABLE_CLIP: 2511 hfp_connection->command = HFP_CMD_NONE; 2512 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2513 hfp_connection->ok_pending = 1; 2514 break; 2515 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2516 hfp_connection->command = HFP_CMD_NONE; 2517 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2518 hfp_connection->ok_pending = 1; 2519 break; 2520 case HFP_CMD_SET_SPEAKER_GAIN: 2521 hfp_connection->command = HFP_CMD_NONE; 2522 hfp_connection->ok_pending = 1; 2523 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2524 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2525 break; 2526 case HFP_CMD_SET_MICROPHONE_GAIN: 2527 hfp_connection->command = HFP_CMD_NONE; 2528 hfp_connection->ok_pending = 1; 2529 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2530 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2531 break; 2532 case HFP_CMD_CUSTOM_MESSAGE: 2533 hfp_connection->command = HFP_CMD_NONE; 2534 hfp_parser_reset_line_buffer(hfp_connection); 2535 log_info("Custom AT Command ID 0x%04x", hfp_connection->custom_at_command_id); 2536 hfp_ag_emit_custom_command_event(hfp_connection); 2537 break; 2538 case HFP_CMD_UNKNOWN: 2539 hfp_connection->command = HFP_CMD_NONE; 2540 hfp_connection->send_error = 1; 2541 break; 2542 default: 2543 break; 2544 } 2545 } 2546 } 2547 2548 static void hfp_ag_run(void){ 2549 btstack_linked_list_iterator_t it; 2550 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2551 while (btstack_linked_list_iterator_has_next(&it)){ 2552 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2553 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2554 hfp_ag_run_for_context(hfp_connection); 2555 } 2556 } 2557 2558 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2559 hfp_connection_t * hfp_connection = NULL; 2560 switch (packet_type){ 2561 case RFCOMM_DATA_PACKET: 2562 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2563 btstack_assert(hfp_connection != NULL); 2564 2565 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2566 hfp_ag_run_for_context(hfp_connection); 2567 return; 2568 case HCI_EVENT_PACKET: 2569 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2570 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2571 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2572 btstack_assert(hfp_connection != NULL); 2573 2574 hfp_ag_run_for_context(hfp_connection); 2575 return; 2576 } 2577 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2578 break; 2579 default: 2580 break; 2581 } 2582 2583 hfp_ag_run(); 2584 } 2585 2586 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2587 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2588 hfp_ag_run(); 2589 } 2590 2591 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2592 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2593 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2594 return; 2595 } 2596 int i; 2597 hfp_ag_codecs_nr = codecs_nr; 2598 for (i=0; i < codecs_nr; i++){ 2599 hfp_ag_codecs[i] = codecs[i]; 2600 } 2601 } 2602 2603 void hfp_ag_init_supported_features(uint32_t supported_features){ 2604 hfp_ag_supported_features = supported_features; 2605 } 2606 2607 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2608 hfp_ag_indicators_nr = ag_indicators_nr; 2609 (void)memcpy(hfp_ag_indicators, ag_indicators, 2610 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2611 } 2612 2613 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2614 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2615 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2616 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2617 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2618 } 2619 2620 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2621 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2622 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2623 call_hold_services_nr * sizeof(char *)); 2624 } 2625 2626 2627 void hfp_ag_init(uint8_t rfcomm_channel_nr){ 2628 2629 hfp_init(); 2630 hfp_ag_call_hold_services_nr = 0; 2631 hfp_ag_response_and_hold_active = false; 2632 hfp_ag_indicators_nr = 0; 2633 hfp_ag_codecs_nr = 0; 2634 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2635 hfp_ag_subscriber_numbers = NULL; 2636 hfp_ag_subscriber_numbers_count = 0; 2637 2638 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2639 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2640 2641 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2642 2643 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2644 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2645 2646 hfp_gsm_init(); 2647 } 2648 2649 void hfp_ag_deinit(void){ 2650 hfp_deinit(); 2651 hfp_gsm_deinit(); 2652 2653 hfp_ag_callback = NULL; 2654 hfp_ag_supported_features = 0; 2655 hfp_ag_codecs_nr = 0; 2656 hfp_ag_indicators_nr = 0; 2657 hfp_ag_call_hold_services_nr = 0; 2658 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2659 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2660 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2661 hfp_ag_subscriber_numbers = NULL; 2662 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2663 hfp_ag_custom_call_sm_handler = NULL; 2664 } 2665 2666 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2667 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2668 } 2669 2670 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2671 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2672 if (!hfp_connection){ 2673 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2674 } 2675 2676 hfp_trigger_release_service_level_connection(hfp_connection); 2677 hfp_ag_run_for_context(hfp_connection); 2678 return ERROR_CODE_SUCCESS; 2679 } 2680 2681 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2682 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2683 if (!hfp_connection){ 2684 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2685 } 2686 2687 hfp_connection->extended_audio_gateway_error = 0; 2688 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2689 return ERROR_CODE_COMMAND_DISALLOWED; 2690 } 2691 2692 hfp_connection->extended_audio_gateway_error = error; 2693 hfp_ag_run_for_context(hfp_connection); 2694 return ERROR_CODE_SUCCESS; 2695 } 2696 2697 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2698 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2699 return ERROR_CODE_COMMAND_DISALLOWED; 2700 } 2701 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2702 return ERROR_CODE_COMMAND_DISALLOWED; 2703 } 2704 2705 hfp_connection->establish_audio_connection = 1; 2706 if (!has_codec_negotiation_feature(hfp_connection)){ 2707 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2708 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2709 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2710 // now, pick link settings 2711 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2712 #ifdef ENABLE_CC256X_ASSISTED_HFP 2713 hfp_cc256x_prepare_for_sco(hfp_connection); 2714 #endif 2715 return ERROR_CODE_SUCCESS; 2716 } 2717 2718 uint8_t i; 2719 bool codec_was_in_use = false; 2720 bool better_codec_can_be_used = false; 2721 2722 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2723 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2724 codec_was_in_use = true; 2725 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2726 better_codec_can_be_used = true; 2727 } 2728 } 2729 2730 if (!codec_was_in_use || better_codec_can_be_used){ 2731 hfp_connection->ag_send_common_codec = true; 2732 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2733 } 2734 return ERROR_CODE_SUCCESS; 2735 } 2736 2737 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2738 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2739 if (!hfp_connection){ 2740 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2741 } 2742 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2743 if (status != ERROR_CODE_SUCCESS){ 2744 return status; 2745 } 2746 hfp_ag_run_for_context(hfp_connection); 2747 return ERROR_CODE_SUCCESS; 2748 } 2749 2750 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2751 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2752 if (!hfp_connection){ 2753 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2754 } 2755 2756 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2757 return ERROR_CODE_COMMAND_DISALLOWED; 2758 } 2759 2760 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2761 if (status == ERROR_CODE_SUCCESS){ 2762 hfp_ag_run_for_context(hfp_connection); 2763 } 2764 return status; 2765 } 2766 2767 /** 2768 * @brief Enable in-band ring tone 2769 */ 2770 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2771 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2772 return; 2773 } 2774 2775 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2776 2777 btstack_linked_list_iterator_t it; 2778 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2779 while (btstack_linked_list_iterator_has_next(&it)){ 2780 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2781 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2782 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2783 hfp_ag_run_for_context(hfp_connection); 2784 } 2785 } 2786 2787 /** 2788 * @brief Called from GSM 2789 */ 2790 void hfp_ag_incoming_call(void){ 2791 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2792 } 2793 2794 void hfp_ag_outgoing_call_initiated(void) { 2795 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2796 } 2797 2798 /** 2799 * @brief number is stored. 2800 */ 2801 void hfp_ag_set_clip(uint8_t type, const char * number){ 2802 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2803 } 2804 2805 void hfp_ag_call_dropped(void){ 2806 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2807 } 2808 2809 // call from AG UI 2810 void hfp_ag_answer_incoming_call(void){ 2811 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2812 } 2813 2814 void hfp_ag_join_held_call(void){ 2815 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2816 } 2817 2818 void hfp_ag_terminate_call(void){ 2819 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2820 } 2821 2822 void hfp_ag_outgoing_call_ringing(void){ 2823 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2824 } 2825 2826 void hfp_ag_outgoing_call_established(void){ 2827 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2828 } 2829 2830 void hfp_ag_outgoing_call_rejected(void){ 2831 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2832 } 2833 2834 void hfp_ag_outgoing_call_accepted(void){ 2835 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2836 } 2837 2838 void hfp_ag_hold_incoming_call(void){ 2839 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2840 } 2841 2842 void hfp_ag_accept_held_incoming_call(void) { 2843 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2844 } 2845 2846 void hfp_ag_reject_held_incoming_call(void){ 2847 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2848 } 2849 2850 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2851 int indicator_index = get_ag_indicator_index_for_name(name); 2852 if (indicator_index < 0) return; 2853 hfp_ag_indicators[indicator_index].status = value; 2854 2855 btstack_linked_list_iterator_t it; 2856 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2857 while (btstack_linked_list_iterator_has_next(&it)){ 2858 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2859 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2860 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2861 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2862 continue; 2863 } 2864 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2865 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2866 hfp_ag_run_for_context(hfp_connection); 2867 } 2868 } 2869 2870 uint8_t hfp_ag_set_registration_status(int registration_status){ 2871 if ((registration_status < 0) || (registration_status > 1)){ 2872 return ERROR_CODE_COMMAND_DISALLOWED; 2873 } 2874 2875 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2876 2877 // if network goes away wihle a call is active: 2878 // - the call gets dropped 2879 // - we send NO CARRIER 2880 // NOTE: the CALL=0 has to be sent before NO CARRIER 2881 2882 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2883 2884 btstack_linked_list_iterator_t it; 2885 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2886 while (btstack_linked_list_iterator_has_next(&it)){ 2887 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2888 hfp_connection->ag_send_no_carrier = true; 2889 } 2890 } 2891 hfp_ag_set_ag_indicator("service", registration_status); 2892 return ERROR_CODE_SUCCESS; 2893 } 2894 2895 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2896 if ((signal_strength < 0) || (signal_strength > 5)){ 2897 return ERROR_CODE_COMMAND_DISALLOWED; 2898 } 2899 2900 hfp_ag_set_ag_indicator("signal", signal_strength); 2901 return ERROR_CODE_SUCCESS; 2902 } 2903 2904 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2905 if ((roaming_status < 0) || (roaming_status > 1)){ 2906 return ERROR_CODE_COMMAND_DISALLOWED; 2907 } 2908 2909 hfp_ag_set_ag_indicator("roam", roaming_status); 2910 return ERROR_CODE_SUCCESS; 2911 } 2912 2913 uint8_t hfp_ag_set_battery_level(int battery_level){ 2914 if ((battery_level < 0) || (battery_level > 5)){ 2915 return ERROR_CODE_COMMAND_DISALLOWED; 2916 } 2917 hfp_ag_set_ag_indicator("battchg", battery_level); 2918 return ERROR_CODE_SUCCESS; 2919 } 2920 2921 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2922 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2923 if (!hfp_connection){ 2924 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2925 } 2926 2927 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2928 return ERROR_CODE_COMMAND_DISALLOWED; 2929 } 2930 2931 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2932 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2933 if (!enhanced_vra_supported && !legacy_vra_supported){ 2934 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2935 } 2936 2937 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2938 return ERROR_CODE_COMMAND_DISALLOWED; 2939 } 2940 2941 hfp_connection->ag_activate_voice_recognition_value = 1; 2942 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2943 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2944 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2945 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2946 hfp_connection->ag_vra_send_command = true; 2947 hfp_ag_run_for_context(hfp_connection); 2948 return ERROR_CODE_SUCCESS; 2949 } 2950 2951 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2952 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2953 if (!hfp_connection){ 2954 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2955 } 2956 2957 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2958 return ERROR_CODE_COMMAND_DISALLOWED; 2959 } 2960 2961 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2962 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2963 2964 if (!enhanced_vra_supported && !legacy_vra_supported){ 2965 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2966 } 2967 2968 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2969 return ERROR_CODE_COMMAND_DISALLOWED; 2970 } 2971 2972 hfp_connection->ag_activate_voice_recognition_value = 0; 2973 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2974 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2975 hfp_connection->ag_vra_send_command = true; 2976 hfp_ag_run_for_context(hfp_connection); 2977 return ERROR_CODE_SUCCESS; 2978 } 2979 2980 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2981 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2982 if (!hfp_connection){ 2983 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2984 } 2985 2986 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2987 return ERROR_CODE_COMMAND_DISALLOWED; 2988 } 2989 2990 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2991 return ERROR_CODE_COMMAND_DISALLOWED; 2992 } 2993 2994 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2995 return ERROR_CODE_COMMAND_DISALLOWED; 2996 } 2997 2998 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2999 if (!enhanced_vra_supported ){ 3000 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3001 } 3002 3003 3004 hfp_connection->ag_vra_state = state; 3005 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 3006 hfp_connection->ag_vra_send_command = true; 3007 hfp_ag_run_for_context(hfp_connection); 3008 return ERROR_CODE_SUCCESS; 3009 } 3010 3011 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 3012 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 3013 } 3014 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 3015 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 3016 } 3017 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 3018 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 3019 } 3020 3021 3022 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){ 3023 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3024 if (!hfp_connection){ 3025 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3026 } 3027 3028 if (hfp_connection->emit_vra_enabled_after_audio_established){ 3029 return ERROR_CODE_COMMAND_DISALLOWED; 3030 } 3031 3032 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 3033 return ERROR_CODE_COMMAND_DISALLOWED; 3034 } 3035 3036 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 3037 return ERROR_CODE_COMMAND_DISALLOWED; 3038 } 3039 3040 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 3041 if (!enhanced_vra_supported ){ 3042 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3043 } 3044 3045 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 3046 if (!enhanced_vra_msg_supported ){ 3047 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3048 } 3049 3050 uint16_t message_len = (uint16_t) strlen(msg.text); 3051 3052 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 3053 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3054 } 3055 3056 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 3057 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3058 } 3059 3060 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 3061 hfp_connection->ag_msg = msg; 3062 hfp_connection->ag_vra_state = state; 3063 hfp_connection->ag_vra_send_command = true; 3064 hfp_ag_run_for_context(hfp_connection); 3065 3066 return ERROR_CODE_SUCCESS; 3067 } 3068 3069 3070 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3071 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3072 if (!hfp_connection){ 3073 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3074 } 3075 3076 if ((gain < 0) || (gain > 15)){ 3077 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3078 return ERROR_CODE_COMMAND_DISALLOWED; 3079 } 3080 3081 if (hfp_connection->microphone_gain != gain){ 3082 hfp_connection->microphone_gain = gain; 3083 hfp_connection->send_microphone_gain = 1; 3084 } 3085 hfp_ag_run_for_context(hfp_connection); 3086 return ERROR_CODE_SUCCESS; 3087 } 3088 3089 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3090 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3091 if (!hfp_connection){ 3092 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3093 } 3094 3095 if ((gain < 0) || (gain > 15)){ 3096 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3097 return ERROR_CODE_COMMAND_DISALLOWED; 3098 } 3099 3100 if (hfp_connection->speaker_gain != gain){ 3101 hfp_connection->speaker_gain = gain; 3102 hfp_connection->send_speaker_gain = 1; 3103 } 3104 hfp_ag_run_for_context(hfp_connection); 3105 return ERROR_CODE_SUCCESS; 3106 } 3107 3108 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3109 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3110 if (!hfp_connection){ 3111 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3112 } 3113 3114 hfp_ag_set_clip(0, number); 3115 hfp_connection->send_phone_number_for_voice_tag = 1; 3116 return ERROR_CODE_SUCCESS; 3117 } 3118 3119 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3120 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3121 if (!hfp_connection){ 3122 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3123 } 3124 3125 hfp_connection->send_error = 1; 3126 return ERROR_CODE_SUCCESS; 3127 } 3128 3129 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3130 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3131 if (!hfp_connection){ 3132 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3133 } 3134 3135 hfp_connection->ok_pending = 1; 3136 return ERROR_CODE_SUCCESS; 3137 } 3138 3139 uint8_t hfp_ag_send_unsolicited_result_code(hci_con_handle_t acl_handle, const char * unsolicited_result_code){ 3140 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3141 if (!hfp_connection){ 3142 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3143 } 3144 if (hfp_connection->send_custom_message != NULL){ 3145 return ERROR_CODE_COMMAND_DISALLOWED; 3146 } 3147 hfp_connection->send_custom_message = unsolicited_result_code; 3148 hfp_ag_run_for_context(hfp_connection); 3149 return ERROR_CODE_SUCCESS; 3150 } 3151 3152 uint8_t hfp_ag_send_command_result_code(hci_con_handle_t acl_handle, bool ok){ 3153 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3154 if (!hfp_connection){ 3155 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3156 } 3157 if (ok){ 3158 hfp_connection->ok_pending = 1; 3159 } else { 3160 hfp_connection->send_error = 1; 3161 } 3162 hfp_ag_run_for_context(hfp_connection); 3163 return ERROR_CODE_SUCCESS; 3164 } 3165 3166 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3167 hfp_ag_subscriber_numbers = numbers; 3168 hfp_ag_subscriber_numbers_count = numbers_count; 3169 } 3170 3171 void hfp_ag_clear_last_dialed_number(void){ 3172 hfp_gsm_clear_last_dialed_number(); 3173 } 3174 3175 void hfp_ag_set_last_dialed_number(const char * number){ 3176 hfp_gsm_set_last_dialed_number(number); 3177 } 3178 3179 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3180 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3181 if (!hfp_connection){ 3182 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3183 } 3184 3185 if (!hfp_connection->call_waiting_notification_enabled){ 3186 return ERROR_CODE_COMMAND_DISALLOWED; 3187 } 3188 3189 hfp_connection->ag_notify_incoming_call_waiting = 1; 3190 hfp_ag_run_for_context(hfp_connection); 3191 return ERROR_CODE_SUCCESS; 3192 } 3193 3194 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){ 3195 if (!name){ 3196 name = hfp_ag_default_service_name; 3197 } 3198 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3199 3200 /* 3201 * 0x01 – Ability to reject a call 3202 * 0x00 – No ability to reject a call 3203 */ 3204 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3205 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3206 3207 // Construct SupportedFeatures for SDP bitmap: 3208 // 3209 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3210 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3211 // 3212 // Wide band speech (bit 5) requires Codec negotiation 3213 // 3214 uint16_t sdp_features = supported_features & 0x1f; 3215 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3216 sdp_features |= 1 << 5; 3217 } 3218 3219 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3220 sdp_features |= 1 << 6; 3221 } 3222 3223 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3224 sdp_features |= 1 << 7; 3225 } 3226 3227 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3228 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3229 } 3230 3231 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3232 btstack_assert(callback != NULL); 3233 3234 hfp_ag_callback = callback; 3235 hfp_set_ag_callback(callback); 3236 } 3237 3238 void hfp_ag_register_custom_call_sm_handler(bool (*handler)(hfp_ag_call_event_t event)){ 3239 hfp_ag_custom_call_sm_handler = handler; 3240 } 3241 3242 void hfp_ag_register_custom_at_command(hfp_custom_at_command_t * custom_at_command){ 3243 hfp_register_custom_ag_command(custom_at_command); 3244 } 3245