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 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 = 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 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_ag_codecs_nr, hfp_ag_codecs)){ 554 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 555 return HFP_CODEC_MSBC; 556 } 557 } 558 return HFP_CODEC_CVSD; 559 } 560 561 /* state machines */ 562 563 static uint8_t hfp_ag_esco_s4_supported(hfp_connection_t * hfp_connection){ 564 return (hfp_connection->remote_supported_features & (1<<HFP_HFSF_ESCO_S4)) && (hfp_ag_supported_features & (1 << HFP_AGSF_ESCO_S4)); 565 } 566 567 static int codecs_exchange_state_machine(hfp_connection_t * hfp_connection){ 568 /* events ( == commands): 569 HFP_CMD_AVAILABLE_CODECS == received AT+BAC with list of codecs 570 HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 571 hf_trigger_codec_connection_setup == received BCC 572 ag_trigger_codec_connection_setup == received from AG to send BCS 573 HFP_CMD_HF_CONFIRMED_CODEC == received AT+BCS 574 */ 575 switch (hfp_connection->codecs_state){ 576 case HFP_CODECS_EXCHANGED: 577 if (hfp_connection->command == HFP_CMD_AVAILABLE_CODECS){ 578 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 579 return 1; 580 } 581 break; 582 583 case HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE: 584 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 585 hfp_connection->ag_send_common_codec = true; 586 break; 587 default: 588 break; 589 } 590 591 if (hfp_connection->ag_send_common_codec){ 592 hfp_connection->ag_send_common_codec = false; 593 hfp_connection->codecs_state = HFP_CODECS_AG_SENT_COMMON_CODEC; 594 hfp_connection->suggested_codec = hfp_ag_suggest_codec(hfp_connection); 595 hfp_ag_send_suggest_codec_cmd(hfp_connection->rfcomm_cid, hfp_connection->suggested_codec); 596 return 1; 597 } 598 599 switch (hfp_connection->command){ 600 case HFP_CMD_AVAILABLE_CODECS: 601 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 602 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_LIST; 603 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 604 return 1; 605 } 606 607 switch (hfp_connection->codecs_state){ 608 case HFP_CODECS_AG_SENT_COMMON_CODEC: 609 hfp_connection->codecs_state = HFP_CODECS_AG_RESEND_COMMON_CODEC; 610 break; 611 default: 612 break; 613 } 614 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 615 return 1; 616 617 case HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 618 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE; 619 hfp_connection->establish_audio_connection = 1; 620 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 621 return 1; 622 623 case HFP_CMD_HF_CONFIRMED_CODEC: 624 if (hfp_connection->codec_confirmed != hfp_connection->suggested_codec){ 625 hfp_connection->codecs_state = HFP_CODECS_ERROR; 626 hfp_ag_send_error(hfp_connection->rfcomm_cid); 627 return 1; 628 } 629 hfp_connection->negotiated_codec = hfp_connection->codec_confirmed; 630 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 631 log_info("hfp: codec confirmed: %s", (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? "mSBC" : "CVSD"); 632 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 633 // now, pick link settings 634 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 635 #ifdef ENABLE_CC256X_ASSISTED_HFP 636 hfp_cc256x_prepare_for_sco(hfp_connection); 637 #endif 638 #ifdef ENABLE_RTK_PCM_WBS 639 hfp_connection->rtk_send_sco_config = true; 640 #endif 641 return 1; 642 default: 643 break; 644 } 645 return 0; 646 } 647 648 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 649 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 650 hfp_emit_slc_connection_event(hfp_connection, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 651 652 // if active call exist, set per-hfp_connection state active, too (when audio is on) 653 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 654 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 655 } 656 // if AG is ringing, also start ringing on the HF 657 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 658 switch (hfp_gsm_callsetup_status()){ 659 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 660 hfp_ag_hf_start_ringing_incoming(hfp_connection); 661 break; 662 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 663 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 664 break; 665 default: 666 break; 667 } 668 } 669 } 670 671 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 672 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 673 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 674 int sent = 0; 675 switch(hfp_connection->command){ 676 case HFP_CMD_SUPPORTED_FEATURES: 677 switch(hfp_connection->state){ 678 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 679 case HFP_EXCHANGE_SUPPORTED_FEATURES: 680 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 681 if (has_codec_negotiation_feature(hfp_connection)){ 682 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 683 } else { 684 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 685 } 686 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 687 return 1; 688 default: 689 break; 690 } 691 break; 692 case HFP_CMD_AVAILABLE_CODECS: 693 sent = codecs_exchange_state_machine(hfp_connection); 694 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 695 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 696 } 697 return sent; 698 699 case HFP_CMD_RETRIEVE_AG_INDICATORS: 700 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 701 // HF requested AG Indicators and we did expect it 702 hfp_connection->send_ag_indicators_segment = 0; 703 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 704 // continue below in state switch 705 } 706 break; 707 708 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 709 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 710 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 711 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 712 return 1; 713 714 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 715 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 716 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 717 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 718 } else if (has_hf_indicators_feature(hfp_connection)){ 719 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 720 } else { 721 hfp_ag_slc_established(hfp_connection); 722 } 723 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 724 return 1; 725 726 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 727 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 728 if (has_hf_indicators_feature(hfp_connection)){ 729 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 730 } 731 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 732 if (!has_hf_indicators_feature(hfp_connection)){ 733 hfp_ag_slc_established(hfp_connection); 734 } 735 return 1; 736 737 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 738 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 739 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 740 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 741 return 1; 742 743 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 744 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 745 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 746 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 747 return 1; 748 749 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 750 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 751 hfp_ag_slc_established(hfp_connection); 752 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 753 return 1; 754 default: 755 break; 756 } 757 758 switch (hfp_connection->state){ 759 case HFP_RETRIEVE_INDICATORS: { 760 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 761 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 762 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 763 if (next_segment < num_segments){ 764 // prepare sending of next segment 765 hfp_connection->send_ag_indicators_segment = next_segment; 766 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 767 } else { 768 // done, go to next state 769 hfp_connection->send_ag_indicators_segment = 0; 770 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 771 } 772 return 1; 773 } 774 default: 775 break; 776 } 777 return 0; 778 } 779 780 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 781 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 782 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 783 return hf && ag; 784 } 785 786 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 787 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 788 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 789 return hf && ag; 790 } 791 792 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 793 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 794 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 795 return hf && ag; 796 } 797 798 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 799 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 800 return false; 801 } 802 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 803 return false; 804 } 805 if (hfp_connection->ag_vra_send_command){ 806 return false; 807 } 808 return true; 809 } 810 811 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 812 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 813 return false; 814 } 815 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 816 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 817 return true; 818 } 819 return false; 820 } 821 return true; 822 } 823 824 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 825 switch (hfp_connection->state){ 826 case HFP_W2_CONNECT_SCO: 827 case HFP_W4_SCO_CONNECTED: 828 case HFP_AUDIO_CONNECTION_ESTABLISHED: 829 return true; 830 default: 831 return false; 832 } 833 } 834 835 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 836 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 837 838 uint8_t event[6]; 839 event[0] = HCI_EVENT_HFP_META; 840 event[1] = sizeof(event) - 2; 841 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 842 little_endian_store_16(event, 3, acl_handle); 843 event[5] = status; 844 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 845 } 846 847 848 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 849 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 850 851 uint8_t event[8]; 852 event[0] = HCI_EVENT_HFP_META; 853 event[1] = sizeof(event) - 2; 854 event[2] = HFP_SUBEVENT_HF_INDICATOR; 855 little_endian_store_16(event, 3, acl_handle); 856 little_endian_store_16(event, 5, uuid); 857 event[7] = value; 858 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 859 } 860 861 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 862 if (!hfp_ag_callback) return; 863 864 uint8_t event[5]; 865 event[0] = HCI_EVENT_HFP_META; 866 event[1] = sizeof(event) - 2; 867 event[2] = event_subtype; 868 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 869 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 870 } 871 872 // @return status 873 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 874 uint8_t status = ERROR_CODE_SUCCESS; 875 switch (hfp_connection->vra_state_requested){ 876 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 877 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 878 status = hfp_ag_setup_audio_connection(hfp_connection); 879 if (status != ERROR_CODE_SUCCESS){ 880 hfp_connection->vra_state_requested = hfp_connection->vra_state; 881 hfp_emit_voice_recognition_enabled(hfp_connection, status); 882 break; 883 } 884 } 885 hfp_connection->enhanced_voice_recognition_enabled = true; 886 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 887 hfp_connection->vra_state_requested = hfp_connection->vra_state; 888 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 889 break; 890 891 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 892 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 893 hfp_connection->vra_state_requested = hfp_connection->vra_state; 894 895 // release audio connection only if it was opened after audio VR activated 896 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 897 hfp_trigger_release_audio_connection(hfp_connection); 898 } 899 900 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 901 break; 902 903 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 904 // open only if audio connection does not already exist 905 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 906 status = hfp_ag_setup_audio_connection(hfp_connection); 907 if (status != ERROR_CODE_SUCCESS){ 908 hfp_connection->vra_state_requested = hfp_connection->vra_state; 909 hfp_emit_voice_recognition_enabled(hfp_connection, status); 910 break; 911 } 912 } 913 914 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 915 hfp_connection->vra_state_requested = hfp_connection->vra_state; 916 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 917 918 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 919 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 920 } else { 921 hfp_connection->emit_vra_enabled_after_audio_established = true; 922 } 923 break; 924 925 default: 926 break; 927 } 928 return status; 929 } 930 931 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 932 uint8_t done = 0; 933 uint8_t status; 934 935 switch (hfp_connection->vra_state_requested){ 936 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 937 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 938 if (done == 0){ 939 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 940 } else { 941 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 942 } 943 hfp_connection->vra_state_requested = hfp_connection->vra_state; 944 return done; 945 946 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 947 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 948 if (done == 0){ 949 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 950 } else { 951 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 952 } 953 hfp_connection->vra_state_requested = hfp_connection->vra_state; 954 return done; 955 956 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 957 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 958 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 959 if (done == 0){ 960 hfp_connection->vra_state_requested = hfp_connection->vra_state; 961 962 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 963 hfp_emit_voice_recognition_enabled(hfp_connection, done); 964 } else { 965 hfp_emit_voice_recognition_disabled(hfp_connection, done); 966 } 967 return 0; 968 } 969 status = hfp_ag_vra_state_machine_two(hfp_connection); 970 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 971 972 default: 973 log_error("state %u", hfp_connection->vra_state_requested); 974 btstack_assert(false); 975 return 0; 976 } 977 } 978 979 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 980 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 981 return 0; 982 } 983 int done = 0; 984 uint8_t status; 985 986 // VRA action initiated by AG 987 if (hfp_connection->ag_vra_send_command){ 988 hfp_connection->ag_vra_send_command = false; 989 return hfp_ag_vra_send_command(hfp_connection); 990 } 991 992 if (hfp_connection->ag_vra_requested_by_hf){ 993 hfp_connection->ag_vra_requested_by_hf = false; 994 995 // HF initiatied voice recognition, parser extracted activation value 996 switch (hfp_connection->ag_activate_voice_recognition_value){ 997 case 0: 998 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 999 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 1000 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1001 } 1002 break; 1003 1004 case 1: 1005 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1006 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1007 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1008 } 1009 break; 1010 1011 case 2: 1012 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1013 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1014 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1015 } 1016 break; 1017 default: 1018 break; 1019 } 1020 if (done == 0){ 1021 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1022 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1023 return 1; 1024 } 1025 1026 status = hfp_ag_vra_state_machine_two(hfp_connection); 1027 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1028 } 1029 1030 return 0; 1031 } 1032 1033 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1034 int sent = codecs_exchange_state_machine(hfp_connection); 1035 if (sent) return 1; 1036 1037 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1038 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1039 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1040 return 1; 1041 } 1042 1043 switch(hfp_connection->command){ 1044 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1045 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1046 return 1; 1047 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1048 if (hfp_connection->network_operator.format != 0){ 1049 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1050 } else { 1051 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1052 } 1053 return 1; 1054 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1055 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1056 return 1; 1057 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1058 if (hfp_connection->extended_audio_gateway_error){ 1059 hfp_connection->extended_audio_gateway_error = 0; 1060 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1061 return 1; 1062 } 1063 break; 1064 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1065 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1066 return 1; 1067 default: 1068 break; 1069 } 1070 return 0; 1071 } 1072 1073 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1074 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1075 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1076 1077 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1078 1079 if (hfp_connection->release_audio_connection){ 1080 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1081 hfp_connection->release_audio_connection = 0; 1082 gap_disconnect(hfp_connection->sco_handle); 1083 return 1; 1084 } 1085 1086 // accept incoming audio connection (codec negotiation is not used) 1087 if (hfp_connection->accept_sco){ 1088 // notify about codec selection if not done already 1089 if (hfp_connection->negotiated_codec == 0){ 1090 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1091 } 1092 // 1093 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1094 hfp_connection->accept_sco = 0; 1095 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1096 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1097 return 1; 1098 } 1099 1100 // run codecs exchange 1101 int sent = codecs_exchange_state_machine(hfp_connection); 1102 if (sent) return 1; 1103 1104 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1105 if (hfp_connection->establish_audio_connection){ 1106 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1107 hfp_connection->establish_audio_connection = 0; 1108 hfp_setup_synchronous_connection(hfp_connection); 1109 return 1; 1110 } 1111 return 0; 1112 } 1113 1114 static void hfp_ag_set_callsetup_indicator(void){ 1115 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1116 if (!indicator){ 1117 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1118 return; 1119 }; 1120 indicator->status = hfp_gsm_callsetup_status(); 1121 } 1122 1123 static void hfp_ag_set_callheld_indicator(void){ 1124 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1125 if (!indicator){ 1126 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1127 return; 1128 }; 1129 indicator->status = hfp_gsm_callheld_status(); 1130 } 1131 1132 // 1133 // transition implementations for hfp_ag_call_state_machine 1134 // 1135 1136 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1137 if (use_in_band_tone()){ 1138 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1139 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1140 } else { 1141 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1142 } 1143 } 1144 1145 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1146 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1147 } 1148 1149 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1150 hfp_connection->ag_ring = 0; 1151 hfp_connection->ag_send_clip = 0; 1152 } 1153 1154 1155 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1156 btstack_linked_list_iterator_t it; 1157 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1158 while (btstack_linked_list_iterator_has_next(&it)){ 1159 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1160 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1161 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1162 1163 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1164 hfp_ag_run_for_context(hfp_connection); 1165 } 1166 } 1167 1168 static void hfp_ag_trigger_ring_and_clip(void) { 1169 btstack_linked_list_iterator_t it; 1170 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1171 while (btstack_linked_list_iterator_has_next(&it)){ 1172 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1173 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1174 switch (hfp_connection->call_state){ 1175 case HFP_CALL_INCOMING_RINGING: 1176 case HFP_CALL_OUTGOING_RINGING: 1177 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1178 // Queue RING on this connection 1179 hfp_connection->ag_ring = 1; 1180 1181 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1182 // "If the calling subscriber number information is available from the network, the AG shall issue the 1183 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1184 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1185 1186 // trigger next message 1187 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1188 break; 1189 default: 1190 break; 1191 } 1192 } 1193 } 1194 1195 // trigger RING and CLIP messages on connections that are ringing 1196 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1197 hfp_ag_trigger_ring_and_clip(); 1198 1199 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1200 btstack_run_loop_add_timer(timer); 1201 } 1202 1203 static void hfp_ag_ring_timeout_stop(void){ 1204 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1205 } 1206 1207 static void hfp_ag_start_ringing(void){ 1208 // setup ring timer 1209 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1210 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1211 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1212 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1213 1214 // emit start ringing 1215 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1216 1217 // send initial RING + CLIP 1218 hfp_ag_trigger_ring_and_clip(); 1219 } 1220 1221 static void hfp_ag_stop_ringing(void){ 1222 hfp_ag_ring_timeout_stop(); 1223 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1224 1225 btstack_linked_list_iterator_t it; 1226 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1227 while (btstack_linked_list_iterator_has_next(&it)){ 1228 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1229 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1230 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1231 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1232 hfp_ag_hf_stop_ringing(hfp_connection); 1233 } 1234 } 1235 1236 static void hfp_ag_trigger_incoming_call_idle(void){ 1237 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1238 if (indicator_index < 0) return; 1239 1240 // update callsetup state in connections 1241 btstack_linked_list_iterator_t it; 1242 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1243 while (btstack_linked_list_iterator_has_next(&it)){ 1244 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1245 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1246 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1247 1248 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1249 1250 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1251 1252 hfp_ag_run_for_context(hfp_connection); 1253 } 1254 1255 // start local ringing - started after connection state has been updated 1256 hfp_ag_start_ringing(); 1257 } 1258 1259 static void hfp_ag_trigger_outgoing_call(void){ 1260 btstack_linked_list_iterator_t it; 1261 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1262 while (btstack_linked_list_iterator_has_next(&it)){ 1263 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1264 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1265 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1266 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1267 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1268 } 1269 } 1270 } 1271 1272 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1273 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1274 1275 // trigger callsetup to be 1276 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1277 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1278 1279 int indicator_index ; 1280 1281 hfp_ag_set_callsetup_indicator(); 1282 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1283 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1284 1285 // put current call on hold if active 1286 if (put_call_on_hold){ 1287 log_info("AG putting current call on hold for new outgoing call"); 1288 hfp_ag_set_callheld_indicator(); 1289 indicator_index = get_ag_indicator_index_for_name("callheld"); 1290 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1291 } 1292 1293 // start audio if needed 1294 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1295 } 1296 1297 static void hfp_ag_transfer_indicator(const char * name){ 1298 int indicator_index = get_ag_indicator_index_for_name(name); 1299 if (indicator_index < 0) return; 1300 1301 btstack_linked_list_iterator_t it; 1302 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1303 while (btstack_linked_list_iterator_has_next(&it)){ 1304 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1305 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1306 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1307 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1308 hfp_ag_run_for_context(hfp_connection); 1309 } 1310 } 1311 1312 static void hfp_ag_transfer_callsetup_state(void){ 1313 hfp_ag_transfer_indicator("callsetup"); 1314 } 1315 1316 static void hfp_ag_transfer_call_state(void){ 1317 hfp_ag_transfer_indicator("call"); 1318 } 1319 1320 static void hfp_ag_transfer_callheld_state(void){ 1321 hfp_ag_transfer_indicator("callheld"); 1322 } 1323 1324 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1325 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1326 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1327 1328 hfp_ag_stop_ringing(); 1329 1330 btstack_linked_list_iterator_t it; 1331 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1332 while (btstack_linked_list_iterator_has_next(&it)){ 1333 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1334 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1335 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1336 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1337 1338 if (hfp_connection == source){ 1339 1340 if (use_in_band_tone()){ 1341 hfp_connection->call_state = HFP_CALL_ACTIVE; 1342 } else { 1343 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1344 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1345 } 1346 1347 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1348 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1349 1350 } else { 1351 hfp_connection->call_state = HFP_CALL_IDLE; 1352 } 1353 hfp_ag_run_for_context(hfp_connection); 1354 } 1355 } 1356 1357 static void hfp_ag_ag_accept_call(void){ 1358 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1359 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1360 1361 hfp_ag_stop_ringing(); 1362 1363 btstack_linked_list_iterator_t it; 1364 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1365 while (btstack_linked_list_iterator_has_next(&it)){ 1366 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1367 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1368 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1369 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1370 1371 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1372 1373 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1374 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1375 1376 hfp_ag_run_for_context(hfp_connection); 1377 break; // only single 1378 } 1379 } 1380 1381 static void hfp_ag_trigger_reject_call(void){ 1382 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1383 1384 hfp_ag_stop_ringing(); 1385 1386 btstack_linked_list_iterator_t it; 1387 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1388 while (btstack_linked_list_iterator_has_next(&it)){ 1389 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1390 if (connection->local_role != HFP_ROLE_AG) continue; 1391 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1392 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1393 1394 connection->call_state = HFP_CALL_IDLE; 1395 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1396 1397 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1398 connection->release_audio_connection = 1; 1399 } 1400 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1401 hfp_ag_run_for_context(connection); 1402 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1403 } 1404 } 1405 1406 static void hfp_ag_trigger_terminate_call(void){ 1407 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1408 1409 // no ringing during call 1410 1411 btstack_linked_list_iterator_t it; 1412 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1413 while (btstack_linked_list_iterator_has_next(&it)){ 1414 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1415 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1416 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1417 1418 hfp_connection->call_state = HFP_CALL_IDLE; 1419 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1420 1421 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1422 hfp_connection->release_audio_connection = 1; 1423 } 1424 1425 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1426 hfp_ag_run_for_context(hfp_connection); 1427 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1428 } 1429 } 1430 1431 static void hfp_ag_set_call_indicator(void){ 1432 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1433 if (!indicator){ 1434 log_error("hfp_ag_set_call_state: call indicator is missing"); 1435 return; 1436 }; 1437 indicator->status = hfp_gsm_call_status(); 1438 } 1439 1440 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1441 btstack_linked_list_iterator_t it; 1442 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1443 while (btstack_linked_list_iterator_has_next(&it)){ 1444 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1445 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1446 if (hfp_connection->call_state == call_state) return hfp_connection; 1447 } 1448 return NULL; 1449 } 1450 1451 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 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 hfp_connection->send_response_and_hold_status = state + 1; 1458 } 1459 } 1460 1461 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1462 int indicator_index; 1463 switch (hfp_connection->call_state){ 1464 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1465 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1466 // we got event: audio hfp_connection established 1467 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1468 break; 1469 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1470 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1471 // we got event: audio hfp_connection established 1472 hfp_connection->call_state = HFP_CALL_ACTIVE; 1473 break; 1474 case HFP_CALL_W2_SEND_CALL_WAITING: 1475 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1476 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1477 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1478 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1479 break; 1480 default: 1481 break; 1482 } 1483 return 0; 1484 } 1485 1486 // functions extracted from hfp_ag_call_sm below 1487 static void hfp_ag_handle_reject_outgoing_call(void){ 1488 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1489 if (!hfp_connection){ 1490 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1491 return; 1492 } 1493 1494 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1495 hfp_connection->call_state = HFP_CALL_IDLE; 1496 hfp_connection->send_error = 1; 1497 hfp_ag_run_for_context(hfp_connection); 1498 } 1499 1500 // hfp_connection is used to identify originating HF 1501 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1502 1503 // allow to intercept call statemachine events 1504 if (hfp_ag_custom_call_sm_handler != NULL){ 1505 bool handle_event = (*hfp_ag_custom_call_sm_handler)(event); 1506 if (!handle_event) return; 1507 } 1508 1509 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1510 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1511 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1512 1513 switch (event){ 1514 case HFP_AG_INCOMING_CALL: 1515 switch (hfp_gsm_call_status()){ 1516 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1517 switch (hfp_gsm_callsetup_status()){ 1518 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1519 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1520 hfp_ag_set_callsetup_indicator(); 1521 hfp_ag_trigger_incoming_call_idle(); 1522 log_info("AG rings"); 1523 break; 1524 default: 1525 break; 1526 } 1527 break; 1528 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1529 switch (hfp_gsm_callsetup_status()){ 1530 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1531 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1532 hfp_ag_set_callsetup_indicator(); 1533 hfp_ag_trigger_incoming_call_during_active_one(); 1534 log_info("AG call waiting"); 1535 break; 1536 default: 1537 break; 1538 } 1539 break; 1540 default: 1541 break; 1542 } 1543 break; 1544 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1545 switch (hfp_gsm_call_status()){ 1546 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1547 switch (hfp_gsm_callsetup_status()){ 1548 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1549 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1550 hfp_ag_set_call_indicator(); 1551 hfp_ag_set_callsetup_indicator(); 1552 hfp_ag_ag_accept_call(); 1553 log_info("AG answers call, accept call by GSM"); 1554 break; 1555 default: 1556 break; 1557 } 1558 break; 1559 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1560 switch (hfp_gsm_callsetup_status()){ 1561 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1562 log_info("AG: current call is placed on hold, incoming call gets active"); 1563 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1564 hfp_ag_set_callsetup_indicator(); 1565 hfp_ag_set_callheld_indicator(); 1566 hfp_ag_transfer_callsetup_state(); 1567 hfp_ag_transfer_callheld_state(); 1568 break; 1569 default: 1570 break; 1571 } 1572 break; 1573 default: 1574 break; 1575 } 1576 break; 1577 1578 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1579 switch (hfp_gsm_call_status()){ 1580 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1581 switch (hfp_gsm_callheld_status()){ 1582 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1583 log_info("AG: joining held call with active call"); 1584 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1585 hfp_ag_set_callheld_indicator(); 1586 hfp_ag_transfer_callheld_state(); 1587 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1588 break; 1589 default: 1590 break; 1591 } 1592 break; 1593 default: 1594 break; 1595 } 1596 break; 1597 1598 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1599 switch (hfp_gsm_call_status()){ 1600 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1601 switch (hfp_gsm_callsetup_status()){ 1602 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1603 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1604 hfp_ag_set_callsetup_indicator(); 1605 hfp_ag_set_call_indicator(); 1606 hfp_ag_hf_accept_call(hfp_connection); 1607 hfp_connection->ok_pending = 1; 1608 log_info("HF answers call, accept call by GSM"); 1609 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1610 break; 1611 default: 1612 break; 1613 } 1614 break; 1615 default: 1616 break; 1617 } 1618 break; 1619 1620 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1621 switch (hfp_gsm_call_status()){ 1622 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1623 switch (hfp_gsm_callsetup_status()){ 1624 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1625 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1626 hfp_ag_response_and_hold_active = true; 1627 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1628 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1629 // as with regular call 1630 hfp_ag_set_call_indicator(); 1631 hfp_ag_set_callsetup_indicator(); 1632 hfp_ag_ag_accept_call(); 1633 log_info("AG response and hold - hold by AG"); 1634 break; 1635 default: 1636 break; 1637 } 1638 break; 1639 default: 1640 break; 1641 } 1642 break; 1643 1644 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1645 switch (hfp_gsm_call_status()){ 1646 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1647 switch (hfp_gsm_callsetup_status()){ 1648 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1649 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1650 hfp_ag_response_and_hold_active = true; 1651 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1652 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1653 // as with regular call 1654 hfp_ag_set_call_indicator(); 1655 hfp_ag_set_callsetup_indicator(); 1656 hfp_ag_hf_accept_call(hfp_connection); 1657 log_info("AG response and hold - hold by HF"); 1658 break; 1659 default: 1660 break; 1661 } 1662 break; 1663 default: 1664 break; 1665 } 1666 break; 1667 1668 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1669 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1670 if (!hfp_ag_response_and_hold_active) break; 1671 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1672 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1673 hfp_ag_response_and_hold_active = false; 1674 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1675 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1676 log_info("Held Call accepted and active"); 1677 break; 1678 1679 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1680 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1681 if (!hfp_ag_response_and_hold_active) break; 1682 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1683 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1684 hfp_ag_response_and_hold_active = false; 1685 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1686 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1687 // from terminate by ag 1688 hfp_ag_set_call_indicator(); 1689 hfp_ag_trigger_terminate_call(); 1690 break; 1691 1692 case HFP_AG_TERMINATE_CALL_BY_HF: 1693 switch (hfp_gsm_call_status()){ 1694 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1695 switch (hfp_gsm_callsetup_status()){ 1696 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1697 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1698 hfp_ag_set_callsetup_indicator(); 1699 hfp_ag_transfer_callsetup_state(); 1700 hfp_ag_trigger_reject_call(); 1701 log_info("HF Rejected Incoming call, AG terminate call"); 1702 break; 1703 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1704 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1705 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1706 hfp_ag_set_callsetup_indicator(); 1707 hfp_ag_transfer_callsetup_state(); 1708 log_info("AG terminate outgoing call process"); 1709 break; 1710 default: 1711 break; 1712 } 1713 break; 1714 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1715 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1716 hfp_ag_set_callsetup_indicator(); 1717 hfp_ag_set_call_indicator(); 1718 hfp_ag_trigger_terminate_call(); 1719 log_info("AG terminate call"); 1720 break; 1721 default: 1722 break; 1723 } 1724 break; 1725 1726 case HFP_AG_TERMINATE_CALL_BY_AG: 1727 switch (hfp_gsm_call_status()){ 1728 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1729 switch (hfp_gsm_callsetup_status()){ 1730 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1731 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1732 hfp_ag_set_callsetup_indicator(); 1733 hfp_ag_trigger_reject_call(); 1734 log_info("AG Rejected Incoming call, AG terminate call"); 1735 break; 1736 default: 1737 break; 1738 } 1739 break; 1740 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1741 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1742 hfp_ag_set_callsetup_indicator(); 1743 hfp_ag_set_call_indicator(); 1744 hfp_ag_trigger_terminate_call(); 1745 log_info("AG terminate call"); 1746 break; 1747 default: 1748 break; 1749 } 1750 break; 1751 case HFP_AG_CALL_DROPPED: 1752 switch (hfp_gsm_call_status()){ 1753 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1754 switch (hfp_gsm_callsetup_status()){ 1755 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1756 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1757 hfp_ag_stop_ringing(); 1758 break; 1759 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1760 log_info("Outgoing call interrupted\n"); 1761 break; 1762 default: 1763 break; 1764 } 1765 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1766 hfp_ag_set_callsetup_indicator(); 1767 hfp_ag_transfer_callsetup_state(); 1768 hfp_ag_trigger_terminate_call(); 1769 break; 1770 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1771 if (hfp_ag_response_and_hold_active) { 1772 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1773 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1774 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1775 } 1776 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1777 hfp_ag_set_callsetup_indicator(); 1778 hfp_ag_set_call_indicator(); 1779 hfp_ag_trigger_terminate_call(); 1780 log_info("AG notify call dropped"); 1781 break; 1782 default: 1783 break; 1784 } 1785 break; 1786 1787 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1788 // directly reject call if number of free slots is exceeded 1789 if (!hfp_gsm_call_possible()){ 1790 hfp_connection->send_error = 1; 1791 hfp_ag_run_for_context(hfp_connection); 1792 break; 1793 } 1794 1795 // note: number not used currently 1796 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1797 1798 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1799 1800 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1801 break; 1802 1803 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1804 // directly reject call if number of free slots is exceeded 1805 if (!hfp_gsm_call_possible()) { 1806 // TODO: no error for user 1807 break; 1808 } 1809 switch (hfp_gsm_call_status()) { 1810 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1811 switch (hfp_gsm_callsetup_status()) { 1812 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1813 // note: number not used currently 1814 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1815 // init call state for all connections 1816 hfp_ag_trigger_outgoing_call(); 1817 // get first one and accept call 1818 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1819 if (hfp_connection) { 1820 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1821 } 1822 break; 1823 default: 1824 // TODO: no error for user 1825 break; 1826 } 1827 break; 1828 default: 1829 // TODO: no error for user 1830 break; 1831 } 1832 break; 1833 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1834 // directly reject call if number of free slots is exceeded 1835 if (!hfp_gsm_call_possible()){ 1836 hfp_connection->send_error = 1; 1837 hfp_ag_run_for_context(hfp_connection); 1838 break; 1839 } 1840 1841 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1842 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1843 1844 log_info("Redial last number"); 1845 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1846 1847 if (strlen(last_dialed_number) > 0){ 1848 log_info("Last number exists: accept call"); 1849 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1850 } else { 1851 log_info("log_infoLast number missing: reject call"); 1852 hfp_ag_handle_reject_outgoing_call(); 1853 } 1854 break; 1855 } 1856 case HFP_AG_OUTGOING_CALL_REJECTED: 1857 hfp_ag_handle_reject_outgoing_call(); 1858 break; 1859 1860 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1861 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1862 if (!hfp_connection){ 1863 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1864 break; 1865 } 1866 1867 hfp_connection->ok_pending = 1; 1868 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1869 break; 1870 } 1871 case HFP_AG_OUTGOING_CALL_RINGING: 1872 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1873 if (!hfp_connection){ 1874 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1875 break; 1876 } 1877 1878 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1879 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1880 hfp_ag_set_callsetup_indicator(); 1881 hfp_ag_transfer_callsetup_state(); 1882 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1883 break; 1884 1885 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1886 // get outgoing call 1887 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1888 if (!hfp_connection){ 1889 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1890 } 1891 if (!hfp_connection){ 1892 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1893 break; 1894 } 1895 1896 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1897 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1898 hfp_connection->call_state = HFP_CALL_ACTIVE; 1899 hfp_ag_set_callsetup_indicator(); 1900 hfp_ag_set_call_indicator(); 1901 hfp_ag_transfer_call_state(); 1902 hfp_ag_transfer_callsetup_state(); 1903 if (callheld_status_call_on_hold_and_no_active_calls){ 1904 hfp_ag_set_callheld_indicator(); 1905 hfp_ag_transfer_callheld_state(); 1906 } 1907 hfp_ag_hf_stop_ringing(hfp_connection); 1908 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1909 break; 1910 } 1911 1912 case HFP_AG_CALL_HOLD_USER_BUSY: 1913 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1914 hfp_ag_set_callsetup_indicator(); 1915 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1916 hfp_connection->call_state = HFP_CALL_ACTIVE; 1917 log_info("AG: Call Waiting, User Busy"); 1918 break; 1919 1920 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1921 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1922 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1923 1924 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1925 if (call_held || call_setup_in_progress){ 1926 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1927 0, NULL); 1928 1929 } 1930 1931 if (call_setup_in_progress){ 1932 log_info("AG: Call Dropped, Accept new call"); 1933 hfp_ag_set_callsetup_indicator(); 1934 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1935 } else { 1936 log_info("AG: Call Dropped, Resume held call"); 1937 } 1938 if (call_held){ 1939 hfp_ag_set_callheld_indicator(); 1940 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1941 } 1942 1943 hfp_connection->call_state = HFP_CALL_ACTIVE; 1944 break; 1945 } 1946 1947 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1948 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1949 // only update if callsetup changed 1950 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1951 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1952 NULL); 1953 1954 if (call_setup_in_progress){ 1955 log_info("AG: Call on Hold, Accept new call"); 1956 hfp_ag_set_callsetup_indicator(); 1957 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1958 } else { 1959 log_info("AG: Swap calls"); 1960 } 1961 1962 hfp_ag_set_callheld_indicator(); 1963 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1964 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1965 hfp_connection->call_state = HFP_CALL_ACTIVE; 1966 break; 1967 } 1968 1969 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1970 // Adds a held call to the conversation. 1971 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1972 log_info("AG: Join 3-way-call"); 1973 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1974 hfp_ag_set_callheld_indicator(); 1975 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1976 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1977 } 1978 hfp_connection->call_state = HFP_CALL_ACTIVE; 1979 break; 1980 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1981 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1982 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1983 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1984 hfp_ag_set_call_indicator(); 1985 hfp_ag_set_callheld_indicator(); 1986 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1987 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1988 hfp_connection->call_state = HFP_CALL_IDLE; 1989 break; 1990 1991 default: 1992 break; 1993 } 1994 1995 1996 } 1997 1998 1999 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2000 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2001 if (!active_call) return; 2002 2003 int idx = active_call->index; 2004 hfp_enhanced_call_dir_t dir = active_call->direction; 2005 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2006 hfp_enhanced_call_mode_t mode = active_call->mode; 2007 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2008 uint8_t type = active_call->clip_type; 2009 char * number = active_call->clip_number; 2010 2011 char buffer[100]; 2012 // TODO: check length of a buffer, to fit the MTU 2013 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2014 if (number){ 2015 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2016 } 2017 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2018 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, 2019 mode, mpty, type, number); 2020 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2021 } 2022 2023 // sends pending command, returns if command was sent 2024 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2025 if (hfp_connection->send_status_of_current_calls){ 2026 hfp_connection->ok_pending = 0; 2027 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2028 hfp_connection->next_call_index++; 2029 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2030 return 1; 2031 } else { 2032 // 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 2033 hfp_connection->next_call_index = 0; 2034 hfp_connection->ok_pending = 1; 2035 hfp_connection->send_status_of_current_calls = 0; 2036 } 2037 } 2038 2039 if (hfp_connection->ag_notify_incoming_call_waiting){ 2040 hfp_connection->ag_notify_incoming_call_waiting = 0; 2041 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2042 return 1; 2043 } 2044 2045 if (hfp_connection->send_error){ 2046 hfp_connection->send_error = 0; 2047 hfp_connection->command = HFP_CMD_NONE; 2048 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2049 return 1; 2050 } 2051 2052 // note: before update AG indicators and ok_pending 2053 if (hfp_connection->send_response_and_hold_status){ 2054 int status = hfp_connection->send_response_and_hold_status - 1; 2055 hfp_connection->send_response_and_hold_status = 0; 2056 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2057 return 1; 2058 } 2059 2060 if (hfp_connection->ok_pending){ 2061 hfp_connection->ok_pending = 0; 2062 hfp_connection->command = HFP_CMD_NONE; 2063 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2064 return 1; 2065 } 2066 2067 // update AG indicators 2068 if (hfp_connection->ag_indicators_status_update_bitmap){ 2069 int i; 2070 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2071 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2072 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2073 if (!hfp_connection->enable_status_update_for_ag_indicators) { 2074 log_info("+CMER:3,0,0,0 - not sending update for '%s'", hfp_ag_indicators[i].name); 2075 break; 2076 } 2077 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2078 return 1; 2079 } 2080 } 2081 } 2082 2083 if (hfp_connection->ag_send_no_carrier){ 2084 hfp_connection->ag_send_no_carrier = false; 2085 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2086 return 1; 2087 } 2088 2089 if (hfp_connection->send_phone_number_for_voice_tag){ 2090 hfp_connection->send_phone_number_for_voice_tag = 0; 2091 hfp_connection->command = HFP_CMD_NONE; 2092 hfp_connection->ok_pending = 1; 2093 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2094 return 1; 2095 } 2096 2097 if (hfp_connection->send_subscriber_number){ 2098 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2099 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2100 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2101 } else { 2102 hfp_connection->send_subscriber_number = 0; 2103 hfp_connection->next_subscriber_number_to_send = 0; 2104 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2105 } 2106 hfp_connection->command = HFP_CMD_NONE; 2107 return 1; 2108 } 2109 2110 if (hfp_connection->send_microphone_gain){ 2111 hfp_connection->send_microphone_gain = 0; 2112 hfp_connection->command = HFP_CMD_NONE; 2113 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2114 return 1; 2115 } 2116 2117 if (hfp_connection->send_speaker_gain){ 2118 hfp_connection->send_speaker_gain = 0; 2119 hfp_connection->command = HFP_CMD_NONE; 2120 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2121 return 1; 2122 } 2123 2124 if (hfp_connection->send_ag_status_indicators){ 2125 hfp_connection->send_ag_status_indicators = 0; 2126 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2127 return 1; 2128 } 2129 2130 return 0; 2131 } 2132 2133 // sends pending command, returns if command was sent 2134 static int hfp_ag_run_ring_and_clip(hfp_connection_t *hfp_connection){ 2135 // delay RING/CLIP until audio connection has been established for incoming calls 2136 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2137 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2138 if (hfp_connection->ag_ring){ 2139 hfp_connection->ag_ring = 0; 2140 hfp_connection->command = HFP_CMD_NONE; 2141 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2142 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2143 return 1; 2144 } 2145 2146 if (hfp_connection->ag_send_clip){ 2147 hfp_connection->ag_send_clip = 0; 2148 hfp_connection->command = HFP_CMD_NONE; 2149 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2150 return 1; 2151 } 2152 } 2153 return 0; 2154 } 2155 2156 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2157 2158 btstack_assert(hfp_connection != NULL); 2159 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2160 2161 // during SDP query, RFCOMM CID is not set 2162 if (hfp_connection->rfcomm_cid == 0) return; 2163 2164 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2165 hfp_connection->emit_vra_enabled_after_audio_established = false; 2166 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2167 } 2168 2169 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2170 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2171 hfp_connection->release_audio_connection = 0; 2172 gap_disconnect(hfp_connection->sco_handle); 2173 return; 2174 } 2175 2176 // configure NBS/WBS if needed using vendor-specific HCI commands 2177 if (hci_can_send_command_packet_now()) { 2178 #ifdef ENABLE_CC256X_ASSISTED_HFP 2179 // WBS Disassociate 2180 if (hfp_connection->cc256x_send_wbs_disassociate){ 2181 hfp_connection->cc256x_send_wbs_disassociate = false; 2182 hci_send_cmd(&hci_ti_wbs_disassociate); 2183 return; 2184 } 2185 // Write Codec Config 2186 if (hfp_connection->cc256x_send_write_codec_config){ 2187 hfp_connection->cc256x_send_write_codec_config = false; 2188 hfp_cc256x_write_codec_config(hfp_connection); 2189 return; 2190 } 2191 // WBS Associate 2192 if (hfp_connection->cc256x_send_wbs_associate){ 2193 hfp_connection->cc256x_send_wbs_associate = false; 2194 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2195 return; 2196 } 2197 #endif 2198 #ifdef ENABLE_BCM_PCM_WBS 2199 // Enable WBS 2200 if (hfp_connection->bcm_send_enable_wbs){ 2201 hfp_connection->bcm_send_enable_wbs = false; 2202 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2203 return; 2204 } 2205 // Write I2S/PCM params 2206 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2207 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2208 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2209 return; 2210 } 2211 // Disable WBS 2212 if (hfp_connection->bcm_send_disable_wbs){ 2213 hfp_connection->bcm_send_disable_wbs = false; 2214 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2215 return; 2216 } 2217 #endif 2218 #ifdef ENABLE_RTK_PCM_WBS 2219 // Configure CVSD vs. mSBC 2220 if (hfp_connection->rtk_send_sco_config){ 2221 hfp_connection->rtk_send_sco_config = false; 2222 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2223 log_info("RTK SCO: 16k + mSBC"); 2224 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2225 } else { 2226 log_info("RTK SCO: 16k + CVSD"); 2227 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2228 } 2229 return; 2230 } 2231 #endif 2232 } 2233 2234 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2235 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2236 hfp_finalize_connection_context(hfp_connection); 2237 return; 2238 } 2239 #endif 2240 2241 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2242 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2243 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2244 return; 2245 } 2246 2247 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2248 2249 if (!cmd_sent){ 2250 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2251 } 2252 2253 if (!cmd_sent){ 2254 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2255 } 2256 2257 if (!cmd_sent){ 2258 cmd_sent = call_setup_state_machine(hfp_connection); 2259 } 2260 2261 if (!cmd_sent){ 2262 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2263 } 2264 2265 if (!cmd_sent){ 2266 cmd_sent = hfp_ag_run_ring_and_clip(hfp_connection); 2267 } 2268 2269 if (!cmd_sent){ 2270 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2271 } 2272 2273 // disconnect 2274 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2275 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2276 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2277 } 2278 2279 if (cmd_sent){ 2280 hfp_connection->command = HFP_CMD_NONE; 2281 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2282 } 2283 } 2284 2285 static int hfp_parser_is_end_of_line(uint8_t byte){ 2286 return (byte == '\n') || (byte == '\r'); 2287 } 2288 2289 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2290 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2291 if (size < 1) return; 2292 uint8_t status = ERROR_CODE_SUCCESS; 2293 2294 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2295 #ifdef ENABLE_HFP_AT_MESSAGES 2296 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2297 #endif 2298 2299 // process messages byte-wise 2300 int pos; 2301 for (pos = 0; pos < size ; pos++){ 2302 hfp_parse(hfp_connection, packet[pos], 0); 2303 2304 // parse until end of line 2305 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2306 2307 hfp_generic_status_indicator_t * indicator; 2308 switch(hfp_connection->command){ 2309 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2310 hfp_connection->command = HFP_CMD_NONE; 2311 hfp_connection->ag_vra_requested_by_hf = true; 2312 break; 2313 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2314 hfp_connection->command = HFP_CMD_NONE; 2315 if (hfp_ag_response_and_hold_active){ 2316 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2317 } 2318 hfp_connection->ok_pending = 1; 2319 break; 2320 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2321 hfp_connection->command = HFP_CMD_NONE; 2322 switch(hfp_connection->ag_response_and_hold_action){ 2323 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2324 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2325 break; 2326 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2327 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2328 break; 2329 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2330 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2331 break; 2332 default: 2333 break; 2334 } 2335 hfp_connection->ok_pending = 1; 2336 break; 2337 case HFP_CMD_HF_INDICATOR_STATUS: 2338 hfp_connection->command = HFP_CMD_NONE; 2339 2340 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2341 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2342 switch (indicator->uuid){ 2343 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2344 if (hfp_connection->parser_indicator_value > 1) { 2345 hfp_connection->send_error = 1; 2346 break; 2347 } 2348 hfp_connection->ok_pending = 1; 2349 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2350 break; 2351 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2352 if (hfp_connection->parser_indicator_value > 100){ 2353 hfp_connection->send_error = 1; 2354 break; 2355 } 2356 hfp_connection->ok_pending = 1; 2357 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2358 break; 2359 default: 2360 hfp_connection->send_error = 1; 2361 break; 2362 } 2363 } else { 2364 hfp_connection->send_error = 1; 2365 } 2366 break; 2367 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2368 // expected by SLC state machine 2369 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2370 hfp_connection->send_ag_indicators_segment = 0; 2371 hfp_connection->send_ag_status_indicators = 1; 2372 break; 2373 case HFP_CMD_LIST_CURRENT_CALLS: 2374 hfp_connection->command = HFP_CMD_NONE; 2375 hfp_connection->next_call_index = 0; 2376 hfp_connection->send_status_of_current_calls = 1; 2377 break; 2378 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2379 hfp_connection->command = HFP_CMD_NONE; 2380 if (hfp_ag_subscriber_numbers_count == 0){ 2381 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2382 break; 2383 } 2384 hfp_connection->next_subscriber_number_to_send = 0; 2385 hfp_connection->send_subscriber_number = 1; 2386 break; 2387 case HFP_CMD_TRANSMIT_DTMF_CODES: 2388 { 2389 hfp_connection->command = HFP_CMD_NONE; 2390 char buffer[2]; 2391 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2392 buffer[1] = 0; 2393 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2394 break; 2395 } 2396 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2397 hfp_connection->command = HFP_CMD_NONE; 2398 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2399 break; 2400 case HFP_CMD_TURN_OFF_EC_AND_NR: 2401 hfp_connection->command = HFP_CMD_NONE; 2402 2403 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2404 hfp_connection->ok_pending = 1; 2405 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2406 status = ERROR_CODE_SUCCESS; 2407 } else { 2408 hfp_connection->send_error = 1; 2409 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2410 } 2411 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2412 break; 2413 case HFP_CMD_CALL_ANSWERED: 2414 hfp_connection->command = HFP_CMD_NONE; 2415 log_info("HFP: ATA"); 2416 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2417 break; 2418 case HFP_CMD_HANG_UP_CALL: 2419 hfp_connection->command = HFP_CMD_NONE; 2420 hfp_connection->ok_pending = 1; 2421 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2422 break; 2423 case HFP_CMD_CALL_HOLD: { 2424 hfp_connection->command = HFP_CMD_NONE; 2425 hfp_connection->ok_pending = 1; 2426 2427 switch (hfp_connection->ag_call_hold_action){ 2428 case 0: 2429 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2430 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2431 break; 2432 case 1: 2433 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2434 // Where both a held and a waiting call exist, the above procedures shall apply to the 2435 // waiting call (i.e., not to the held call) in conflicting situation. 2436 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2437 break; 2438 case 2: 2439 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2440 // Where both a held and a waiting call exist, the above procedures shall apply to the 2441 // waiting call (i.e., not to the held call) in conflicting situation. 2442 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2443 break; 2444 case 3: 2445 // Adds a held call to the conversation. 2446 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2447 break; 2448 case 4: 2449 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2450 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2451 break; 2452 default: 2453 break; 2454 } 2455 hfp_connection->call_index = 0; 2456 break; 2457 } 2458 case HFP_CMD_CALL_PHONE_NUMBER: 2459 hfp_connection->command = HFP_CMD_NONE; 2460 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2461 break; 2462 case HFP_CMD_REDIAL_LAST_NUMBER: 2463 hfp_connection->command = HFP_CMD_NONE; 2464 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2465 break; 2466 case HFP_CMD_ENABLE_CLIP: 2467 hfp_connection->command = HFP_CMD_NONE; 2468 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2469 hfp_connection->ok_pending = 1; 2470 break; 2471 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2472 hfp_connection->command = HFP_CMD_NONE; 2473 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2474 hfp_connection->ok_pending = 1; 2475 break; 2476 case HFP_CMD_SET_SPEAKER_GAIN: 2477 hfp_connection->command = HFP_CMD_NONE; 2478 hfp_connection->ok_pending = 1; 2479 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2480 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2481 break; 2482 case HFP_CMD_SET_MICROPHONE_GAIN: 2483 hfp_connection->command = HFP_CMD_NONE; 2484 hfp_connection->ok_pending = 1; 2485 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2486 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2487 break; 2488 case HFP_CMD_UNKNOWN: 2489 hfp_connection->command = HFP_CMD_NONE; 2490 hfp_connection->send_error = 1; 2491 break; 2492 default: 2493 break; 2494 } 2495 } 2496 } 2497 2498 static void hfp_ag_run(void){ 2499 btstack_linked_list_iterator_t it; 2500 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2501 while (btstack_linked_list_iterator_has_next(&it)){ 2502 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2503 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2504 hfp_ag_run_for_context(hfp_connection); 2505 } 2506 } 2507 2508 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2509 hfp_connection_t * hfp_connection = NULL; 2510 switch (packet_type){ 2511 case RFCOMM_DATA_PACKET: 2512 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2513 btstack_assert(hfp_connection != NULL); 2514 2515 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2516 hfp_ag_run_for_context(hfp_connection); 2517 return; 2518 case HCI_EVENT_PACKET: 2519 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2520 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2521 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2522 btstack_assert(hfp_connection != NULL); 2523 2524 hfp_ag_run_for_context(hfp_connection); 2525 return; 2526 } 2527 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2528 break; 2529 default: 2530 break; 2531 } 2532 2533 hfp_ag_run(); 2534 } 2535 2536 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2537 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2538 hfp_ag_run(); 2539 } 2540 2541 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2542 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2543 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2544 return; 2545 } 2546 int i; 2547 hfp_ag_codecs_nr = codecs_nr; 2548 for (i=0; i < codecs_nr; i++){ 2549 hfp_ag_codecs[i] = codecs[i]; 2550 } 2551 } 2552 2553 void hfp_ag_init_supported_features(uint32_t supported_features){ 2554 hfp_ag_supported_features = supported_features; 2555 } 2556 2557 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2558 hfp_ag_indicators_nr = ag_indicators_nr; 2559 (void)memcpy(hfp_ag_indicators, ag_indicators, 2560 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2561 } 2562 2563 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2564 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2565 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2566 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2567 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2568 } 2569 2570 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2571 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2572 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2573 call_hold_services_nr * sizeof(char *)); 2574 } 2575 2576 2577 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2578 2579 hfp_init(); 2580 hfp_ag_call_hold_services_nr = 0; 2581 hfp_ag_response_and_hold_active = false; 2582 hfp_ag_indicators_nr = 0; 2583 hfp_ag_codecs_nr = 0; 2584 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2585 hfp_ag_subscriber_numbers = NULL; 2586 hfp_ag_subscriber_numbers_count = 0; 2587 2588 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2589 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2590 2591 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2592 2593 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2594 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2595 2596 hfp_gsm_init(); 2597 } 2598 2599 void hfp_ag_deinit(void){ 2600 hfp_deinit(); 2601 hfp_gsm_deinit(); 2602 2603 hfp_ag_callback = NULL; 2604 hfp_ag_supported_features = 0; 2605 hfp_ag_codecs_nr = 0; 2606 hfp_ag_indicators_nr = 0; 2607 hfp_ag_call_hold_services_nr = 0; 2608 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2609 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2610 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2611 hfp_ag_subscriber_numbers = NULL; 2612 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2613 hfp_ag_custom_call_sm_handler = NULL; 2614 } 2615 2616 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2617 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2618 } 2619 2620 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2621 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2622 if (!hfp_connection){ 2623 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2624 } 2625 2626 hfp_trigger_release_service_level_connection(hfp_connection); 2627 hfp_ag_run_for_context(hfp_connection); 2628 return ERROR_CODE_SUCCESS; 2629 } 2630 2631 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2632 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2633 if (!hfp_connection){ 2634 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2635 } 2636 2637 hfp_connection->extended_audio_gateway_error = 0; 2638 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2639 return ERROR_CODE_COMMAND_DISALLOWED; 2640 } 2641 2642 hfp_connection->extended_audio_gateway_error = error; 2643 hfp_ag_run_for_context(hfp_connection); 2644 return ERROR_CODE_SUCCESS; 2645 } 2646 2647 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2648 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2649 return ERROR_CODE_COMMAND_DISALLOWED; 2650 } 2651 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2652 return ERROR_CODE_COMMAND_DISALLOWED; 2653 } 2654 2655 hfp_connection->establish_audio_connection = 1; 2656 if (!has_codec_negotiation_feature(hfp_connection)){ 2657 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2658 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2659 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2660 // now, pick link settings 2661 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2662 #ifdef ENABLE_CC256X_ASSISTED_HFP 2663 hfp_cc256x_prepare_for_sco(hfp_connection); 2664 #endif 2665 return ERROR_CODE_SUCCESS; 2666 } 2667 2668 uint8_t i; 2669 bool codec_was_in_use = false; 2670 bool better_codec_can_be_used = false; 2671 2672 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2673 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2674 codec_was_in_use = true; 2675 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2676 better_codec_can_be_used = true; 2677 } 2678 } 2679 2680 if (!codec_was_in_use || better_codec_can_be_used){ 2681 hfp_connection->ag_send_common_codec = true; 2682 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2683 } 2684 return ERROR_CODE_SUCCESS; 2685 } 2686 2687 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2688 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2689 if (!hfp_connection){ 2690 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2691 } 2692 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2693 if (status != ERROR_CODE_SUCCESS){ 2694 return status; 2695 } 2696 hfp_ag_run_for_context(hfp_connection); 2697 return ERROR_CODE_SUCCESS; 2698 } 2699 2700 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2701 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2702 if (!hfp_connection){ 2703 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2704 } 2705 2706 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2707 return ERROR_CODE_COMMAND_DISALLOWED; 2708 } 2709 2710 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2711 if (status == ERROR_CODE_SUCCESS){ 2712 hfp_ag_run_for_context(hfp_connection); 2713 } 2714 return status; 2715 } 2716 2717 /** 2718 * @brief Enable in-band ring tone 2719 */ 2720 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2721 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2722 return; 2723 } 2724 2725 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2726 2727 btstack_linked_list_iterator_t it; 2728 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2729 while (btstack_linked_list_iterator_has_next(&it)){ 2730 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2731 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2732 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2733 hfp_ag_run_for_context(hfp_connection); 2734 } 2735 } 2736 2737 /** 2738 * @brief Called from GSM 2739 */ 2740 void hfp_ag_incoming_call(void){ 2741 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2742 } 2743 2744 void hfp_ag_outgoing_call_initiated(const char * number) { 2745 UNUSED(number); 2746 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2747 } 2748 2749 /** 2750 * @brief number is stored. 2751 */ 2752 void hfp_ag_set_clip(uint8_t type, const char * number){ 2753 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2754 } 2755 2756 void hfp_ag_call_dropped(void){ 2757 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2758 } 2759 2760 // call from AG UI 2761 void hfp_ag_answer_incoming_call(void){ 2762 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2763 } 2764 2765 void hfp_ag_join_held_call(void){ 2766 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2767 } 2768 2769 void hfp_ag_terminate_call(void){ 2770 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2771 } 2772 2773 void hfp_ag_outgoing_call_ringing(void){ 2774 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2775 } 2776 2777 void hfp_ag_outgoing_call_established(void){ 2778 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2779 } 2780 2781 void hfp_ag_outgoing_call_rejected(void){ 2782 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2783 } 2784 2785 void hfp_ag_outgoing_call_accepted(void){ 2786 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2787 } 2788 2789 void hfp_ag_hold_incoming_call(void){ 2790 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2791 } 2792 2793 void hfp_ag_accept_held_incoming_call(void) { 2794 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2795 } 2796 2797 void hfp_ag_reject_held_incoming_call(void){ 2798 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2799 } 2800 2801 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2802 int indicator_index = get_ag_indicator_index_for_name(name); 2803 if (indicator_index < 0) return; 2804 hfp_ag_indicators[indicator_index].status = value; 2805 2806 btstack_linked_list_iterator_t it; 2807 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2808 while (btstack_linked_list_iterator_has_next(&it)){ 2809 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2810 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2811 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2812 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2813 continue; 2814 } 2815 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2816 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2817 hfp_ag_run_for_context(hfp_connection); 2818 } 2819 } 2820 2821 uint8_t hfp_ag_set_registration_status(int registration_status){ 2822 if ((registration_status < 0) || (registration_status > 1)){ 2823 return ERROR_CODE_COMMAND_DISALLOWED; 2824 } 2825 2826 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2827 2828 // if network goes away wihle a call is active: 2829 // - the call gets dropped 2830 // - we send NO CARRIER 2831 // NOTE: the CALL=0 has to be sent before NO CARRIER 2832 2833 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2834 2835 btstack_linked_list_iterator_t it; 2836 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2837 while (btstack_linked_list_iterator_has_next(&it)){ 2838 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2839 hfp_connection->ag_send_no_carrier = true; 2840 } 2841 } 2842 hfp_ag_set_ag_indicator("service", registration_status); 2843 return ERROR_CODE_SUCCESS; 2844 } 2845 2846 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2847 if ((signal_strength < 0) || (signal_strength > 5)){ 2848 return ERROR_CODE_COMMAND_DISALLOWED; 2849 } 2850 2851 hfp_ag_set_ag_indicator("signal", signal_strength); 2852 return ERROR_CODE_SUCCESS; 2853 } 2854 2855 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2856 if ((roaming_status < 0) || (roaming_status > 1)){ 2857 return ERROR_CODE_COMMAND_DISALLOWED; 2858 } 2859 2860 hfp_ag_set_ag_indicator("roam", roaming_status); 2861 return ERROR_CODE_SUCCESS; 2862 } 2863 2864 uint8_t hfp_ag_set_battery_level(int battery_level){ 2865 if ((battery_level < 0) || (battery_level > 5)){ 2866 return ERROR_CODE_COMMAND_DISALLOWED; 2867 } 2868 hfp_ag_set_ag_indicator("battchg", battery_level); 2869 return ERROR_CODE_SUCCESS; 2870 } 2871 2872 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2873 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2874 if (!hfp_connection){ 2875 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2876 } 2877 2878 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2879 return ERROR_CODE_COMMAND_DISALLOWED; 2880 } 2881 2882 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2883 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2884 if (!enhanced_vra_supported && !legacy_vra_supported){ 2885 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2886 } 2887 2888 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2889 return ERROR_CODE_COMMAND_DISALLOWED; 2890 } 2891 2892 hfp_connection->ag_activate_voice_recognition_value = 1; 2893 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2894 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2895 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2896 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2897 hfp_connection->ag_vra_send_command = true; 2898 hfp_ag_run_for_context(hfp_connection); 2899 return ERROR_CODE_SUCCESS; 2900 } 2901 2902 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2903 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2904 if (!hfp_connection){ 2905 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2906 } 2907 2908 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2909 return ERROR_CODE_COMMAND_DISALLOWED; 2910 } 2911 2912 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2913 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2914 2915 if (!enhanced_vra_supported && !legacy_vra_supported){ 2916 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2917 } 2918 2919 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2920 return ERROR_CODE_COMMAND_DISALLOWED; 2921 } 2922 2923 hfp_connection->ag_activate_voice_recognition_value = 0; 2924 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2925 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2926 hfp_connection->ag_vra_send_command = true; 2927 hfp_ag_run_for_context(hfp_connection); 2928 return ERROR_CODE_SUCCESS; 2929 } 2930 2931 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2932 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2933 if (!hfp_connection){ 2934 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2935 } 2936 2937 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2938 return ERROR_CODE_COMMAND_DISALLOWED; 2939 } 2940 2941 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2942 return ERROR_CODE_COMMAND_DISALLOWED; 2943 } 2944 2945 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2946 return ERROR_CODE_COMMAND_DISALLOWED; 2947 } 2948 2949 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2950 if (!enhanced_vra_supported ){ 2951 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2952 } 2953 2954 2955 hfp_connection->ag_vra_state = state; 2956 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2957 hfp_connection->ag_vra_send_command = true; 2958 hfp_ag_run_for_context(hfp_connection); 2959 return ERROR_CODE_SUCCESS; 2960 } 2961 2962 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2963 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2964 } 2965 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2966 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2967 } 2968 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2969 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2970 } 2971 2972 2973 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){ 2974 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2975 if (!hfp_connection){ 2976 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2977 } 2978 2979 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2980 return ERROR_CODE_COMMAND_DISALLOWED; 2981 } 2982 2983 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2984 return ERROR_CODE_COMMAND_DISALLOWED; 2985 } 2986 2987 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2988 return ERROR_CODE_COMMAND_DISALLOWED; 2989 } 2990 2991 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2992 if (!enhanced_vra_supported ){ 2993 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2994 } 2995 2996 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 2997 if (!enhanced_vra_msg_supported ){ 2998 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2999 } 3000 3001 uint16_t message_len = strlen(msg.text); 3002 3003 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 3004 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3005 } 3006 3007 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 3008 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3009 } 3010 3011 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 3012 hfp_connection->ag_msg = msg; 3013 hfp_connection->ag_vra_state = state; 3014 hfp_connection->ag_vra_send_command = true; 3015 hfp_ag_run_for_context(hfp_connection); 3016 3017 return ERROR_CODE_SUCCESS; 3018 } 3019 3020 3021 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3022 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3023 if (!hfp_connection){ 3024 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3025 } 3026 3027 if ((gain < 0) || (gain > 15)){ 3028 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3029 return ERROR_CODE_COMMAND_DISALLOWED; 3030 } 3031 3032 if (hfp_connection->microphone_gain != gain){ 3033 hfp_connection->microphone_gain = gain; 3034 hfp_connection->send_microphone_gain = 1; 3035 } 3036 hfp_ag_run_for_context(hfp_connection); 3037 return ERROR_CODE_SUCCESS; 3038 } 3039 3040 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3041 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3042 if (!hfp_connection){ 3043 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3044 } 3045 3046 if ((gain < 0) || (gain > 15)){ 3047 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3048 return ERROR_CODE_COMMAND_DISALLOWED; 3049 } 3050 3051 if (hfp_connection->speaker_gain != gain){ 3052 hfp_connection->speaker_gain = gain; 3053 hfp_connection->send_speaker_gain = 1; 3054 } 3055 hfp_ag_run_for_context(hfp_connection); 3056 return ERROR_CODE_SUCCESS; 3057 } 3058 3059 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3060 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3061 if (!hfp_connection){ 3062 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3063 } 3064 3065 hfp_ag_set_clip(0, number); 3066 hfp_connection->send_phone_number_for_voice_tag = 1; 3067 return ERROR_CODE_SUCCESS; 3068 } 3069 3070 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 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 hfp_connection->send_error = 1; 3077 return ERROR_CODE_SUCCESS; 3078 } 3079 3080 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3081 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3082 if (!hfp_connection){ 3083 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3084 } 3085 3086 hfp_connection->ok_pending = 1; 3087 return ERROR_CODE_SUCCESS; 3088 } 3089 3090 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3091 hfp_ag_subscriber_numbers = numbers; 3092 hfp_ag_subscriber_numbers_count = numbers_count; 3093 } 3094 3095 void hfp_ag_clear_last_dialed_number(void){ 3096 hfp_gsm_clear_last_dialed_number(); 3097 } 3098 3099 void hfp_ag_set_last_dialed_number(const char * number){ 3100 hfp_gsm_set_last_dialed_number(number); 3101 } 3102 3103 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3104 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3105 if (!hfp_connection){ 3106 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3107 } 3108 3109 if (!hfp_connection->call_waiting_notification_enabled){ 3110 return ERROR_CODE_COMMAND_DISALLOWED; 3111 } 3112 3113 hfp_connection->ag_notify_incoming_call_waiting = 1; 3114 hfp_ag_run_for_context(hfp_connection); 3115 return ERROR_CODE_SUCCESS; 3116 } 3117 3118 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){ 3119 if (!name){ 3120 name = hfp_ag_default_service_name; 3121 } 3122 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3123 3124 /* 3125 * 0x01 – Ability to reject a call 3126 * 0x00 – No ability to reject a call 3127 */ 3128 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3129 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3130 3131 // Construct SupportedFeatures for SDP bitmap: 3132 // 3133 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3134 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3135 // 3136 // Wide band speech (bit 5) requires Codec negotiation 3137 // 3138 uint16_t sdp_features = supported_features & 0x1f; 3139 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3140 sdp_features |= 1 << 5; 3141 } 3142 3143 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3144 sdp_features |= 1 << 6; 3145 } 3146 3147 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3148 sdp_features |= 1 << 7; 3149 } 3150 3151 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3152 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3153 } 3154 3155 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3156 btstack_assert(callback != NULL); 3157 3158 hfp_ag_callback = callback; 3159 hfp_set_ag_callback(callback); 3160 } 3161 3162 void hfp_ag_register_custom_call_sm_handler(bool (*handler)(hfp_ag_call_event_t event)){ 3163 hfp_ag_custom_call_sm_handler = handler; 3164 } 3165