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->local_role, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 651 652 // HFP 4.35: "When [...] a new Service Level Connection is established all indicators are activated by default." 653 uint16_t i; 654 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 655 hfp_connection->ag_indicators[i].enabled = 1; 656 } 657 658 // if active call exist, set per-hfp_connection state active, too (when audio is on) 659 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 660 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 661 } 662 // if AG is ringing, also start ringing on the HF 663 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 664 switch (hfp_gsm_callsetup_status()){ 665 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 666 hfp_ag_hf_start_ringing_incoming(hfp_connection); 667 break; 668 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 669 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 670 break; 671 default: 672 break; 673 } 674 } 675 } 676 677 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 678 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 679 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 680 int sent = 0; 681 switch(hfp_connection->command){ 682 case HFP_CMD_SUPPORTED_FEATURES: 683 switch(hfp_connection->state){ 684 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 685 case HFP_EXCHANGE_SUPPORTED_FEATURES: 686 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 687 if (has_codec_negotiation_feature(hfp_connection)){ 688 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 689 } else { 690 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 691 } 692 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 693 return 1; 694 default: 695 break; 696 } 697 break; 698 case HFP_CMD_AVAILABLE_CODECS: 699 sent = codecs_exchange_state_machine(hfp_connection); 700 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 701 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 702 } 703 return sent; 704 705 case HFP_CMD_RETRIEVE_AG_INDICATORS: 706 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 707 // HF requested AG Indicators and we did expect it 708 hfp_connection->send_ag_indicators_segment = 0; 709 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 710 // continue below in state switch 711 } 712 break; 713 714 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 715 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 716 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 717 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 718 return 1; 719 720 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 721 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 722 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 723 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 724 } else if (has_hf_indicators_feature(hfp_connection)){ 725 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 726 } else { 727 hfp_ag_slc_established(hfp_connection); 728 } 729 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 730 return 1; 731 732 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 733 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 734 if (has_hf_indicators_feature(hfp_connection)){ 735 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 736 } 737 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 738 if (!has_hf_indicators_feature(hfp_connection)){ 739 hfp_ag_slc_established(hfp_connection); 740 } 741 return 1; 742 743 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 744 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 745 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 746 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 747 return 1; 748 749 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 750 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 751 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 752 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 753 return 1; 754 755 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 756 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 757 hfp_ag_slc_established(hfp_connection); 758 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 759 return 1; 760 default: 761 break; 762 } 763 764 switch (hfp_connection->state){ 765 case HFP_RETRIEVE_INDICATORS: { 766 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 767 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 768 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 769 if (next_segment < num_segments){ 770 // prepare sending of next segment 771 hfp_connection->send_ag_indicators_segment = next_segment; 772 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 773 } else { 774 // done, go to next state 775 hfp_connection->send_ag_indicators_segment = 0; 776 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 777 } 778 return 1; 779 } 780 default: 781 break; 782 } 783 return 0; 784 } 785 786 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 787 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 788 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 789 return hf && ag; 790 } 791 792 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 793 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 794 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 795 return hf && ag; 796 } 797 798 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 799 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 800 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 801 return hf && ag; 802 } 803 804 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 805 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 806 return false; 807 } 808 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 809 return false; 810 } 811 if (hfp_connection->ag_vra_send_command){ 812 return false; 813 } 814 return true; 815 } 816 817 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 818 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 819 return false; 820 } 821 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 822 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 823 return true; 824 } 825 return false; 826 } 827 return true; 828 } 829 830 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 831 switch (hfp_connection->state){ 832 case HFP_W2_CONNECT_SCO: 833 case HFP_W4_SCO_CONNECTED: 834 case HFP_AUDIO_CONNECTION_ESTABLISHED: 835 return true; 836 default: 837 return false; 838 } 839 } 840 841 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 842 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 843 844 uint8_t event[6]; 845 event[0] = HCI_EVENT_HFP_META; 846 event[1] = sizeof(event) - 2; 847 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 848 little_endian_store_16(event, 3, acl_handle); 849 event[5] = status; 850 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 851 } 852 853 854 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 855 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 856 857 uint8_t event[8]; 858 event[0] = HCI_EVENT_HFP_META; 859 event[1] = sizeof(event) - 2; 860 event[2] = HFP_SUBEVENT_HF_INDICATOR; 861 little_endian_store_16(event, 3, acl_handle); 862 little_endian_store_16(event, 5, uuid); 863 event[7] = value; 864 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 865 } 866 867 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 868 if (!hfp_ag_callback) return; 869 870 uint8_t event[5]; 871 event[0] = HCI_EVENT_HFP_META; 872 event[1] = sizeof(event) - 2; 873 event[2] = event_subtype; 874 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 875 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 876 } 877 878 // @return status 879 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 880 uint8_t status = ERROR_CODE_SUCCESS; 881 switch (hfp_connection->vra_state_requested){ 882 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 883 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 884 status = hfp_ag_setup_audio_connection(hfp_connection); 885 if (status != ERROR_CODE_SUCCESS){ 886 hfp_connection->vra_state_requested = hfp_connection->vra_state; 887 hfp_emit_voice_recognition_enabled(hfp_connection, status); 888 break; 889 } 890 } 891 hfp_connection->enhanced_voice_recognition_enabled = true; 892 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 893 hfp_connection->vra_state_requested = hfp_connection->vra_state; 894 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 895 break; 896 897 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 898 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 899 hfp_connection->vra_state_requested = hfp_connection->vra_state; 900 901 // release audio connection only if it was opened after audio VR activated 902 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 903 hfp_trigger_release_audio_connection(hfp_connection); 904 } 905 906 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 907 break; 908 909 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 910 // open only if audio connection does not already exist 911 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 912 status = hfp_ag_setup_audio_connection(hfp_connection); 913 if (status != ERROR_CODE_SUCCESS){ 914 hfp_connection->vra_state_requested = hfp_connection->vra_state; 915 hfp_emit_voice_recognition_enabled(hfp_connection, status); 916 break; 917 } 918 } 919 920 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 921 hfp_connection->vra_state_requested = hfp_connection->vra_state; 922 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 923 924 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 925 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 926 } else { 927 hfp_connection->emit_vra_enabled_after_audio_established = true; 928 } 929 break; 930 931 default: 932 break; 933 } 934 return status; 935 } 936 937 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 938 uint8_t done = 0; 939 uint8_t status; 940 941 switch (hfp_connection->vra_state_requested){ 942 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 943 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 944 if (done == 0){ 945 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 946 } else { 947 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 948 } 949 hfp_connection->vra_state_requested = hfp_connection->vra_state; 950 return done; 951 952 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 953 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 954 if (done == 0){ 955 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 956 } else { 957 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 958 } 959 hfp_connection->vra_state_requested = hfp_connection->vra_state; 960 return done; 961 962 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 963 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 964 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 965 if (done == 0){ 966 hfp_connection->vra_state_requested = hfp_connection->vra_state; 967 968 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 969 hfp_emit_voice_recognition_enabled(hfp_connection, done); 970 } else { 971 hfp_emit_voice_recognition_disabled(hfp_connection, done); 972 } 973 return 0; 974 } 975 status = hfp_ag_vra_state_machine_two(hfp_connection); 976 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 977 978 default: 979 log_error("state %u", hfp_connection->vra_state_requested); 980 btstack_assert(false); 981 return 0; 982 } 983 } 984 985 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 986 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 987 return 0; 988 } 989 int done = 0; 990 uint8_t status; 991 992 // VRA action initiated by AG 993 if (hfp_connection->ag_vra_send_command){ 994 hfp_connection->ag_vra_send_command = false; 995 return hfp_ag_vra_send_command(hfp_connection); 996 } 997 998 if (hfp_connection->ag_vra_requested_by_hf){ 999 hfp_connection->ag_vra_requested_by_hf = false; 1000 1001 // HF initiatied voice recognition, parser extracted activation value 1002 switch (hfp_connection->ag_activate_voice_recognition_value){ 1003 case 0: 1004 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1005 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 1006 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1007 } 1008 break; 1009 1010 case 1: 1011 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1012 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1013 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1014 } 1015 break; 1016 1017 case 2: 1018 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1019 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1020 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1021 } 1022 break; 1023 default: 1024 break; 1025 } 1026 if (done == 0){ 1027 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1028 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1029 return 1; 1030 } 1031 1032 status = hfp_ag_vra_state_machine_two(hfp_connection); 1033 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1034 } 1035 1036 return 0; 1037 } 1038 1039 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1040 int sent = codecs_exchange_state_machine(hfp_connection); 1041 if (sent) return 1; 1042 1043 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1044 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1045 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1046 return 1; 1047 } 1048 1049 switch(hfp_connection->command){ 1050 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1051 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1052 return 1; 1053 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1054 if (hfp_connection->network_operator.format != 0){ 1055 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1056 } else { 1057 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1058 } 1059 return 1; 1060 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1061 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1062 return 1; 1063 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1064 if (hfp_connection->extended_audio_gateway_error){ 1065 hfp_connection->extended_audio_gateway_error = 0; 1066 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1067 return 1; 1068 } 1069 break; 1070 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1071 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1072 return 1; 1073 default: 1074 break; 1075 } 1076 return 0; 1077 } 1078 1079 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1080 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1081 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1082 1083 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1084 1085 if (hfp_connection->release_audio_connection){ 1086 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1087 hfp_connection->release_audio_connection = 0; 1088 gap_disconnect(hfp_connection->sco_handle); 1089 return 1; 1090 } 1091 1092 // accept incoming audio connection (codec negotiation is not used) 1093 if (hfp_connection->accept_sco){ 1094 // notify about codec selection if not done already 1095 if (hfp_connection->negotiated_codec == 0){ 1096 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1097 } 1098 // 1099 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1100 hfp_connection->accept_sco = 0; 1101 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1102 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1103 return 1; 1104 } 1105 1106 // run codecs exchange 1107 int sent = codecs_exchange_state_machine(hfp_connection); 1108 if (sent) return 1; 1109 1110 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1111 if (hfp_connection->establish_audio_connection){ 1112 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1113 hfp_connection->establish_audio_connection = 0; 1114 hfp_setup_synchronous_connection(hfp_connection); 1115 return 1; 1116 } 1117 return 0; 1118 } 1119 1120 static void hfp_ag_set_callsetup_indicator(void){ 1121 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1122 if (!indicator){ 1123 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1124 return; 1125 }; 1126 indicator->status = hfp_gsm_callsetup_status(); 1127 } 1128 1129 static void hfp_ag_set_callheld_indicator(void){ 1130 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1131 if (!indicator){ 1132 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1133 return; 1134 }; 1135 indicator->status = hfp_gsm_callheld_status(); 1136 } 1137 1138 // 1139 // transition implementations for hfp_ag_call_state_machine 1140 // 1141 1142 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1143 if (use_in_band_tone()){ 1144 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1145 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1146 } else { 1147 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1148 } 1149 } 1150 1151 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1152 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1153 } 1154 1155 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1156 hfp_connection->ag_ring = 0; 1157 hfp_connection->ag_send_clip = 0; 1158 } 1159 1160 1161 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1162 btstack_linked_list_iterator_t it; 1163 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1164 while (btstack_linked_list_iterator_has_next(&it)){ 1165 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1166 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1167 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1168 1169 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1170 hfp_ag_run_for_context(hfp_connection); 1171 } 1172 } 1173 1174 static void hfp_ag_trigger_ring_and_clip(void) { 1175 btstack_linked_list_iterator_t it; 1176 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1177 while (btstack_linked_list_iterator_has_next(&it)){ 1178 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1179 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1180 switch (hfp_connection->call_state){ 1181 case HFP_CALL_INCOMING_RINGING: 1182 case HFP_CALL_OUTGOING_RINGING: 1183 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1184 // Queue RING on this connection 1185 hfp_connection->ag_ring = 1; 1186 1187 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1188 // "If the calling subscriber number information is available from the network, the AG shall issue the 1189 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1190 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1191 1192 // trigger next message 1193 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1194 break; 1195 default: 1196 break; 1197 } 1198 } 1199 } 1200 1201 // trigger RING and CLIP messages on connections that are ringing 1202 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1203 hfp_ag_trigger_ring_and_clip(); 1204 1205 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1206 btstack_run_loop_add_timer(timer); 1207 } 1208 1209 static void hfp_ag_ring_timeout_stop(void){ 1210 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1211 } 1212 1213 static void hfp_ag_start_ringing(void){ 1214 // setup ring timer 1215 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1216 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1217 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1218 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1219 1220 // emit start ringing 1221 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1222 1223 // send initial RING + CLIP 1224 hfp_ag_trigger_ring_and_clip(); 1225 } 1226 1227 static void hfp_ag_stop_ringing(void){ 1228 hfp_ag_ring_timeout_stop(); 1229 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1230 1231 btstack_linked_list_iterator_t it; 1232 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1233 while (btstack_linked_list_iterator_has_next(&it)){ 1234 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1235 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1236 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1237 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1238 hfp_ag_hf_stop_ringing(hfp_connection); 1239 } 1240 } 1241 1242 static void hfp_ag_trigger_incoming_call_idle(void){ 1243 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1244 if (indicator_index < 0) return; 1245 1246 // update callsetup state in connections 1247 btstack_linked_list_iterator_t it; 1248 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1249 while (btstack_linked_list_iterator_has_next(&it)){ 1250 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1251 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1252 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1253 1254 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1255 1256 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1257 1258 hfp_ag_run_for_context(hfp_connection); 1259 } 1260 1261 // start local ringing - started after connection state has been updated 1262 hfp_ag_start_ringing(); 1263 } 1264 1265 static void hfp_ag_trigger_outgoing_call(void){ 1266 btstack_linked_list_iterator_t it; 1267 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1268 while (btstack_linked_list_iterator_has_next(&it)){ 1269 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1270 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1271 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1272 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1273 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1274 } 1275 } 1276 } 1277 1278 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1279 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1280 1281 // trigger callsetup to be 1282 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1283 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1284 1285 int indicator_index ; 1286 1287 hfp_ag_set_callsetup_indicator(); 1288 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1289 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1290 1291 // put current call on hold if active 1292 if (put_call_on_hold){ 1293 log_info("AG putting current call on hold for new outgoing call"); 1294 hfp_ag_set_callheld_indicator(); 1295 indicator_index = get_ag_indicator_index_for_name("callheld"); 1296 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1297 } 1298 1299 // start audio if needed 1300 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1301 } 1302 1303 static void hfp_ag_transfer_indicator(const char * name){ 1304 int indicator_index = get_ag_indicator_index_for_name(name); 1305 if (indicator_index < 0) return; 1306 1307 btstack_linked_list_iterator_t it; 1308 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1309 while (btstack_linked_list_iterator_has_next(&it)){ 1310 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1311 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1312 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1313 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1314 hfp_ag_run_for_context(hfp_connection); 1315 } 1316 } 1317 1318 static void hfp_ag_transfer_callsetup_state(void){ 1319 hfp_ag_transfer_indicator("callsetup"); 1320 } 1321 1322 static void hfp_ag_transfer_call_state(void){ 1323 hfp_ag_transfer_indicator("call"); 1324 } 1325 1326 static void hfp_ag_transfer_callheld_state(void){ 1327 hfp_ag_transfer_indicator("callheld"); 1328 } 1329 1330 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1331 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1332 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1333 1334 hfp_ag_stop_ringing(); 1335 1336 btstack_linked_list_iterator_t it; 1337 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1338 while (btstack_linked_list_iterator_has_next(&it)){ 1339 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1340 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1341 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1342 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1343 1344 if (hfp_connection == source){ 1345 1346 if (use_in_band_tone()){ 1347 hfp_connection->call_state = HFP_CALL_ACTIVE; 1348 } else { 1349 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1350 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1351 } 1352 1353 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1354 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1355 1356 } else { 1357 hfp_connection->call_state = HFP_CALL_IDLE; 1358 } 1359 hfp_ag_run_for_context(hfp_connection); 1360 } 1361 } 1362 1363 static void hfp_ag_ag_accept_call(void){ 1364 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1365 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1366 1367 hfp_ag_stop_ringing(); 1368 1369 btstack_linked_list_iterator_t it; 1370 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1371 while (btstack_linked_list_iterator_has_next(&it)){ 1372 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1373 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1374 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1375 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1376 1377 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1378 1379 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1380 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1381 1382 hfp_ag_run_for_context(hfp_connection); 1383 break; // only single 1384 } 1385 } 1386 1387 static void hfp_ag_trigger_reject_call(void){ 1388 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1389 1390 hfp_ag_stop_ringing(); 1391 1392 btstack_linked_list_iterator_t it; 1393 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1394 while (btstack_linked_list_iterator_has_next(&it)){ 1395 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1396 if (connection->local_role != HFP_ROLE_AG) continue; 1397 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1398 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1399 1400 connection->call_state = HFP_CALL_IDLE; 1401 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1402 1403 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1404 connection->release_audio_connection = 1; 1405 } 1406 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1407 hfp_ag_run_for_context(connection); 1408 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1409 } 1410 } 1411 1412 static void hfp_ag_trigger_terminate_call(void){ 1413 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1414 1415 // no ringing during call 1416 1417 btstack_linked_list_iterator_t it; 1418 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1419 while (btstack_linked_list_iterator_has_next(&it)){ 1420 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1421 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1422 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1423 1424 hfp_connection->call_state = HFP_CALL_IDLE; 1425 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1426 1427 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1428 hfp_connection->release_audio_connection = 1; 1429 } 1430 1431 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1432 hfp_ag_run_for_context(hfp_connection); 1433 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1434 } 1435 } 1436 1437 static void hfp_ag_set_call_indicator(void){ 1438 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1439 if (!indicator){ 1440 log_error("hfp_ag_set_call_state: call indicator is missing"); 1441 return; 1442 }; 1443 indicator->status = hfp_gsm_call_status(); 1444 } 1445 1446 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1447 btstack_linked_list_iterator_t it; 1448 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1449 while (btstack_linked_list_iterator_has_next(&it)){ 1450 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1451 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1452 if (hfp_connection->call_state == call_state) return hfp_connection; 1453 } 1454 return NULL; 1455 } 1456 1457 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1458 btstack_linked_list_iterator_t it; 1459 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1460 while (btstack_linked_list_iterator_has_next(&it)){ 1461 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1462 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1463 hfp_connection->send_response_and_hold_status = state + 1; 1464 } 1465 } 1466 1467 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1468 int indicator_index; 1469 switch (hfp_connection->call_state){ 1470 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1471 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1472 // we got event: audio hfp_connection established 1473 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1474 break; 1475 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1476 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1477 // we got event: audio hfp_connection established 1478 hfp_connection->call_state = HFP_CALL_ACTIVE; 1479 break; 1480 case HFP_CALL_W2_SEND_CALL_WAITING: 1481 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1482 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1483 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1484 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1485 break; 1486 default: 1487 break; 1488 } 1489 return 0; 1490 } 1491 1492 // functions extracted from hfp_ag_call_sm below 1493 static void hfp_ag_handle_reject_outgoing_call(void){ 1494 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1495 if (!hfp_connection){ 1496 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1497 return; 1498 } 1499 1500 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1501 hfp_connection->call_state = HFP_CALL_IDLE; 1502 hfp_connection->send_error = 1; 1503 hfp_ag_run_for_context(hfp_connection); 1504 } 1505 1506 // hfp_connection is used to identify originating HF 1507 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1508 1509 // allow to intercept call statemachine events 1510 if (hfp_ag_custom_call_sm_handler != NULL){ 1511 bool handle_event = (*hfp_ag_custom_call_sm_handler)(event); 1512 if (!handle_event) return; 1513 } 1514 1515 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1516 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1517 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1518 1519 switch (event){ 1520 case HFP_AG_INCOMING_CALL: 1521 switch (hfp_gsm_call_status()){ 1522 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1523 switch (hfp_gsm_callsetup_status()){ 1524 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1525 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1526 hfp_ag_set_callsetup_indicator(); 1527 hfp_ag_trigger_incoming_call_idle(); 1528 log_info("AG rings"); 1529 break; 1530 default: 1531 break; 1532 } 1533 break; 1534 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1535 switch (hfp_gsm_callsetup_status()){ 1536 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1537 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1538 hfp_ag_set_callsetup_indicator(); 1539 hfp_ag_trigger_incoming_call_during_active_one(); 1540 log_info("AG call waiting"); 1541 break; 1542 default: 1543 break; 1544 } 1545 break; 1546 default: 1547 break; 1548 } 1549 break; 1550 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1551 switch (hfp_gsm_call_status()){ 1552 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1553 switch (hfp_gsm_callsetup_status()){ 1554 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1555 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1556 hfp_ag_set_call_indicator(); 1557 hfp_ag_set_callsetup_indicator(); 1558 hfp_ag_ag_accept_call(); 1559 log_info("AG answers call, accept call by GSM"); 1560 break; 1561 default: 1562 break; 1563 } 1564 break; 1565 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1566 switch (hfp_gsm_callsetup_status()){ 1567 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1568 log_info("AG: current call is placed on hold, incoming call gets active"); 1569 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1570 hfp_ag_set_callsetup_indicator(); 1571 hfp_ag_set_callheld_indicator(); 1572 hfp_ag_transfer_callsetup_state(); 1573 hfp_ag_transfer_callheld_state(); 1574 break; 1575 default: 1576 break; 1577 } 1578 break; 1579 default: 1580 break; 1581 } 1582 break; 1583 1584 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1585 switch (hfp_gsm_call_status()){ 1586 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1587 switch (hfp_gsm_callheld_status()){ 1588 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1589 log_info("AG: joining held call with active call"); 1590 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1591 hfp_ag_set_callheld_indicator(); 1592 hfp_ag_transfer_callheld_state(); 1593 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1594 break; 1595 default: 1596 break; 1597 } 1598 break; 1599 default: 1600 break; 1601 } 1602 break; 1603 1604 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1605 switch (hfp_gsm_call_status()){ 1606 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1607 switch (hfp_gsm_callsetup_status()){ 1608 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1609 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1610 hfp_ag_set_callsetup_indicator(); 1611 hfp_ag_set_call_indicator(); 1612 hfp_ag_hf_accept_call(hfp_connection); 1613 hfp_connection->ok_pending = 1; 1614 log_info("HF answers call, accept call by GSM"); 1615 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1616 break; 1617 default: 1618 break; 1619 } 1620 break; 1621 default: 1622 break; 1623 } 1624 break; 1625 1626 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1627 switch (hfp_gsm_call_status()){ 1628 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1629 switch (hfp_gsm_callsetup_status()){ 1630 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1631 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1632 hfp_ag_response_and_hold_active = true; 1633 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1634 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1635 // as with regular call 1636 hfp_ag_set_call_indicator(); 1637 hfp_ag_set_callsetup_indicator(); 1638 hfp_ag_ag_accept_call(); 1639 log_info("AG response and hold - hold by AG"); 1640 break; 1641 default: 1642 break; 1643 } 1644 break; 1645 default: 1646 break; 1647 } 1648 break; 1649 1650 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1651 switch (hfp_gsm_call_status()){ 1652 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1653 switch (hfp_gsm_callsetup_status()){ 1654 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1655 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1656 hfp_ag_response_and_hold_active = true; 1657 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1658 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1659 // as with regular call 1660 hfp_ag_set_call_indicator(); 1661 hfp_ag_set_callsetup_indicator(); 1662 hfp_ag_hf_accept_call(hfp_connection); 1663 log_info("AG response and hold - hold by HF"); 1664 break; 1665 default: 1666 break; 1667 } 1668 break; 1669 default: 1670 break; 1671 } 1672 break; 1673 1674 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1675 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1676 if (!hfp_ag_response_and_hold_active) break; 1677 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1678 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1679 hfp_ag_response_and_hold_active = false; 1680 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1681 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1682 log_info("Held Call accepted and active"); 1683 break; 1684 1685 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1686 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1687 if (!hfp_ag_response_and_hold_active) break; 1688 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1689 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1690 hfp_ag_response_and_hold_active = false; 1691 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1692 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1693 // from terminate by ag 1694 hfp_ag_set_call_indicator(); 1695 hfp_ag_trigger_terminate_call(); 1696 break; 1697 1698 case HFP_AG_TERMINATE_CALL_BY_HF: 1699 switch (hfp_gsm_call_status()){ 1700 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1701 switch (hfp_gsm_callsetup_status()){ 1702 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1703 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1704 hfp_ag_set_callsetup_indicator(); 1705 hfp_ag_transfer_callsetup_state(); 1706 hfp_ag_trigger_reject_call(); 1707 log_info("HF Rejected Incoming call, AG terminate call"); 1708 break; 1709 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1710 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1711 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1712 hfp_ag_set_callsetup_indicator(); 1713 hfp_ag_transfer_callsetup_state(); 1714 log_info("AG terminate outgoing call process"); 1715 break; 1716 default: 1717 break; 1718 } 1719 break; 1720 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1721 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1722 hfp_ag_set_callsetup_indicator(); 1723 hfp_ag_set_call_indicator(); 1724 hfp_ag_trigger_terminate_call(); 1725 log_info("AG terminate call"); 1726 break; 1727 default: 1728 break; 1729 } 1730 break; 1731 1732 case HFP_AG_TERMINATE_CALL_BY_AG: 1733 switch (hfp_gsm_call_status()){ 1734 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1735 switch (hfp_gsm_callsetup_status()){ 1736 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1737 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1738 hfp_ag_set_callsetup_indicator(); 1739 hfp_ag_trigger_reject_call(); 1740 log_info("AG Rejected Incoming call, AG terminate call"); 1741 break; 1742 default: 1743 break; 1744 } 1745 break; 1746 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1747 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1748 hfp_ag_set_callsetup_indicator(); 1749 hfp_ag_set_call_indicator(); 1750 hfp_ag_trigger_terminate_call(); 1751 log_info("AG terminate call"); 1752 break; 1753 default: 1754 break; 1755 } 1756 break; 1757 case HFP_AG_CALL_DROPPED: 1758 switch (hfp_gsm_call_status()){ 1759 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1760 switch (hfp_gsm_callsetup_status()){ 1761 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1762 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1763 hfp_ag_stop_ringing(); 1764 break; 1765 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1766 log_info("Outgoing call interrupted\n"); 1767 break; 1768 default: 1769 break; 1770 } 1771 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1772 hfp_ag_set_callsetup_indicator(); 1773 hfp_ag_transfer_callsetup_state(); 1774 hfp_ag_trigger_terminate_call(); 1775 break; 1776 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1777 if (hfp_ag_response_and_hold_active) { 1778 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1779 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1780 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1781 } 1782 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1783 hfp_ag_set_callsetup_indicator(); 1784 hfp_ag_set_call_indicator(); 1785 hfp_ag_trigger_terminate_call(); 1786 log_info("AG notify call dropped"); 1787 break; 1788 default: 1789 break; 1790 } 1791 break; 1792 1793 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1794 // directly reject call if number of free slots is exceeded 1795 if (!hfp_gsm_call_possible()){ 1796 hfp_connection->send_error = 1; 1797 hfp_ag_run_for_context(hfp_connection); 1798 break; 1799 } 1800 1801 // note: number not used currently 1802 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1803 1804 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1805 1806 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1807 break; 1808 1809 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1810 // directly reject call if number of free slots is exceeded 1811 if (!hfp_gsm_call_possible()) { 1812 // TODO: no error for user 1813 break; 1814 } 1815 switch (hfp_gsm_call_status()) { 1816 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1817 switch (hfp_gsm_callsetup_status()) { 1818 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1819 // note: number not used currently 1820 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1821 // init call state for all connections 1822 hfp_ag_trigger_outgoing_call(); 1823 // get first one and accept call 1824 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1825 if (hfp_connection) { 1826 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1827 } 1828 break; 1829 default: 1830 // TODO: no error for user 1831 break; 1832 } 1833 break; 1834 default: 1835 // TODO: no error for user 1836 break; 1837 } 1838 break; 1839 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1840 // directly reject call if number of free slots is exceeded 1841 if (!hfp_gsm_call_possible()){ 1842 hfp_connection->send_error = 1; 1843 hfp_ag_run_for_context(hfp_connection); 1844 break; 1845 } 1846 1847 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1848 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1849 1850 log_info("Redial last number"); 1851 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1852 1853 if (strlen(last_dialed_number) > 0){ 1854 log_info("Last number exists: accept call"); 1855 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1856 } else { 1857 log_info("log_infoLast number missing: reject call"); 1858 hfp_ag_handle_reject_outgoing_call(); 1859 } 1860 break; 1861 } 1862 case HFP_AG_OUTGOING_CALL_REJECTED: 1863 hfp_ag_handle_reject_outgoing_call(); 1864 break; 1865 1866 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1867 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1868 if (!hfp_connection){ 1869 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1870 break; 1871 } 1872 1873 hfp_connection->ok_pending = 1; 1874 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1875 break; 1876 } 1877 case HFP_AG_OUTGOING_CALL_RINGING: 1878 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1879 if (!hfp_connection){ 1880 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1881 break; 1882 } 1883 1884 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1885 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1886 hfp_ag_set_callsetup_indicator(); 1887 hfp_ag_transfer_callsetup_state(); 1888 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1889 break; 1890 1891 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1892 // get outgoing call 1893 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1894 if (!hfp_connection){ 1895 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1896 } 1897 if (!hfp_connection){ 1898 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1899 break; 1900 } 1901 1902 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1903 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1904 hfp_connection->call_state = HFP_CALL_ACTIVE; 1905 hfp_ag_set_callsetup_indicator(); 1906 hfp_ag_set_call_indicator(); 1907 hfp_ag_transfer_call_state(); 1908 hfp_ag_transfer_callsetup_state(); 1909 if (callheld_status_call_on_hold_and_no_active_calls){ 1910 hfp_ag_set_callheld_indicator(); 1911 hfp_ag_transfer_callheld_state(); 1912 } 1913 hfp_ag_hf_stop_ringing(hfp_connection); 1914 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1915 break; 1916 } 1917 1918 case HFP_AG_CALL_HOLD_USER_BUSY: 1919 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1920 hfp_ag_set_callsetup_indicator(); 1921 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1922 hfp_connection->call_state = HFP_CALL_ACTIVE; 1923 log_info("AG: Call Waiting, User Busy"); 1924 break; 1925 1926 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1927 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1928 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1929 1930 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1931 if (call_held || call_setup_in_progress){ 1932 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1933 0, NULL); 1934 1935 } 1936 1937 if (call_setup_in_progress){ 1938 log_info("AG: Call Dropped, Accept new call"); 1939 hfp_ag_set_callsetup_indicator(); 1940 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1941 } else { 1942 log_info("AG: Call Dropped, Resume held call"); 1943 } 1944 if (call_held){ 1945 hfp_ag_set_callheld_indicator(); 1946 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1947 } 1948 1949 hfp_connection->call_state = HFP_CALL_ACTIVE; 1950 break; 1951 } 1952 1953 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1954 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1955 // only update if callsetup changed 1956 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1957 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1958 NULL); 1959 1960 if (call_setup_in_progress){ 1961 log_info("AG: Call on Hold, Accept new call"); 1962 hfp_ag_set_callsetup_indicator(); 1963 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1964 } else { 1965 log_info("AG: Swap calls"); 1966 } 1967 1968 hfp_ag_set_callheld_indicator(); 1969 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1970 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1971 hfp_connection->call_state = HFP_CALL_ACTIVE; 1972 break; 1973 } 1974 1975 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1976 // Adds a held call to the conversation. 1977 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1978 log_info("AG: Join 3-way-call"); 1979 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1980 hfp_ag_set_callheld_indicator(); 1981 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1982 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1983 } 1984 hfp_connection->call_state = HFP_CALL_ACTIVE; 1985 break; 1986 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1987 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1988 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1989 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1990 hfp_ag_set_call_indicator(); 1991 hfp_ag_set_callheld_indicator(); 1992 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1993 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1994 hfp_connection->call_state = HFP_CALL_IDLE; 1995 break; 1996 1997 default: 1998 break; 1999 } 2000 2001 2002 } 2003 2004 2005 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2006 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2007 if (!active_call) return; 2008 2009 int idx = active_call->index; 2010 hfp_enhanced_call_dir_t dir = active_call->direction; 2011 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2012 hfp_enhanced_call_mode_t mode = active_call->mode; 2013 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2014 uint8_t type = active_call->clip_type; 2015 char * number = active_call->clip_number; 2016 2017 char buffer[100]; 2018 // TODO: check length of a buffer, to fit the MTU 2019 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2020 if (number){ 2021 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2022 } 2023 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2024 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, 2025 mode, mpty, type, number); 2026 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2027 } 2028 2029 // sends pending command, returns if command was sent 2030 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2031 if (hfp_connection->send_status_of_current_calls){ 2032 hfp_connection->ok_pending = 0; 2033 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2034 hfp_connection->next_call_index++; 2035 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2036 return 1; 2037 } else { 2038 // 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 2039 hfp_connection->next_call_index = 0; 2040 hfp_connection->ok_pending = 1; 2041 hfp_connection->send_status_of_current_calls = 0; 2042 } 2043 } 2044 2045 if (hfp_connection->ag_notify_incoming_call_waiting){ 2046 hfp_connection->ag_notify_incoming_call_waiting = 0; 2047 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2048 return 1; 2049 } 2050 2051 if (hfp_connection->send_error){ 2052 hfp_connection->send_error = 0; 2053 hfp_connection->command = HFP_CMD_NONE; 2054 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2055 return 1; 2056 } 2057 2058 // note: before update AG indicators and ok_pending 2059 if (hfp_connection->send_response_and_hold_status){ 2060 int status = hfp_connection->send_response_and_hold_status - 1; 2061 hfp_connection->send_response_and_hold_status = 0; 2062 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2063 return 1; 2064 } 2065 2066 if (hfp_connection->ok_pending){ 2067 hfp_connection->ok_pending = 0; 2068 hfp_connection->command = HFP_CMD_NONE; 2069 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2070 return 1; 2071 } 2072 2073 // update AG indicators only if enabled by AT+CMER=3,0,0,1 2074 if ((hfp_connection->enable_status_update_for_ag_indicators == 1) && (hfp_connection->ag_indicators_status_update_bitmap != 0)){ 2075 uint16_t i; 2076 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2077 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2078 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2079 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2080 return 1; 2081 } 2082 } 2083 } 2084 2085 if (hfp_connection->ag_send_no_carrier){ 2086 hfp_connection->ag_send_no_carrier = false; 2087 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2088 return 1; 2089 } 2090 2091 if (hfp_connection->send_phone_number_for_voice_tag){ 2092 hfp_connection->send_phone_number_for_voice_tag = 0; 2093 hfp_connection->command = HFP_CMD_NONE; 2094 hfp_connection->ok_pending = 1; 2095 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2096 return 1; 2097 } 2098 2099 if (hfp_connection->send_subscriber_number){ 2100 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2101 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2102 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2103 } else { 2104 hfp_connection->send_subscriber_number = 0; 2105 hfp_connection->next_subscriber_number_to_send = 0; 2106 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2107 } 2108 hfp_connection->command = HFP_CMD_NONE; 2109 return 1; 2110 } 2111 2112 if (hfp_connection->send_microphone_gain){ 2113 hfp_connection->send_microphone_gain = 0; 2114 hfp_connection->command = HFP_CMD_NONE; 2115 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2116 return 1; 2117 } 2118 2119 if (hfp_connection->send_speaker_gain){ 2120 hfp_connection->send_speaker_gain = 0; 2121 hfp_connection->command = HFP_CMD_NONE; 2122 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2123 return 1; 2124 } 2125 2126 if (hfp_connection->send_ag_status_indicators){ 2127 hfp_connection->send_ag_status_indicators = 0; 2128 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2129 return 1; 2130 } 2131 2132 return 0; 2133 } 2134 2135 // sends pending command, returns if command was sent 2136 static int hfp_ag_run_ring_and_clip(hfp_connection_t *hfp_connection){ 2137 // delay RING/CLIP until audio connection has been established for incoming calls 2138 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2139 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2140 if (hfp_connection->ag_ring){ 2141 hfp_connection->ag_ring = 0; 2142 hfp_connection->command = HFP_CMD_NONE; 2143 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2144 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2145 return 1; 2146 } 2147 2148 if (hfp_connection->ag_send_clip){ 2149 hfp_connection->ag_send_clip = 0; 2150 hfp_connection->command = HFP_CMD_NONE; 2151 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2152 return 1; 2153 } 2154 } 2155 return 0; 2156 } 2157 2158 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2159 2160 btstack_assert(hfp_connection != NULL); 2161 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2162 2163 // during SDP query, RFCOMM CID is not set 2164 if (hfp_connection->rfcomm_cid == 0) return; 2165 2166 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2167 hfp_connection->emit_vra_enabled_after_audio_established = false; 2168 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2169 } 2170 2171 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2172 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2173 hfp_connection->release_audio_connection = 0; 2174 gap_disconnect(hfp_connection->sco_handle); 2175 return; 2176 } 2177 2178 // configure NBS/WBS if needed using vendor-specific HCI commands 2179 if (hci_can_send_command_packet_now()) { 2180 #ifdef ENABLE_CC256X_ASSISTED_HFP 2181 // WBS Disassociate 2182 if (hfp_connection->cc256x_send_wbs_disassociate){ 2183 hfp_connection->cc256x_send_wbs_disassociate = false; 2184 hci_send_cmd(&hci_ti_wbs_disassociate); 2185 return; 2186 } 2187 // Write Codec Config 2188 if (hfp_connection->cc256x_send_write_codec_config){ 2189 hfp_connection->cc256x_send_write_codec_config = false; 2190 hfp_cc256x_write_codec_config(hfp_connection); 2191 return; 2192 } 2193 // WBS Associate 2194 if (hfp_connection->cc256x_send_wbs_associate){ 2195 hfp_connection->cc256x_send_wbs_associate = false; 2196 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2197 return; 2198 } 2199 #endif 2200 #ifdef ENABLE_BCM_PCM_WBS 2201 // Enable WBS 2202 if (hfp_connection->bcm_send_enable_wbs){ 2203 hfp_connection->bcm_send_enable_wbs = false; 2204 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2205 return; 2206 } 2207 // Write I2S/PCM params 2208 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2209 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2210 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2211 return; 2212 } 2213 // Disable WBS 2214 if (hfp_connection->bcm_send_disable_wbs){ 2215 hfp_connection->bcm_send_disable_wbs = false; 2216 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2217 return; 2218 } 2219 #endif 2220 #ifdef ENABLE_RTK_PCM_WBS 2221 // Configure CVSD vs. mSBC 2222 if (hfp_connection->rtk_send_sco_config){ 2223 hfp_connection->rtk_send_sco_config = false; 2224 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2225 log_info("RTK SCO: 16k + mSBC"); 2226 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2227 } else { 2228 log_info("RTK SCO: 16k + CVSD"); 2229 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2230 } 2231 return; 2232 } 2233 #endif 2234 } 2235 2236 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2237 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2238 hfp_finalize_connection_context(hfp_connection); 2239 return; 2240 } 2241 #endif 2242 2243 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2244 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2245 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2246 return; 2247 } 2248 2249 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2250 2251 if (!cmd_sent){ 2252 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2253 } 2254 2255 if (!cmd_sent){ 2256 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2257 } 2258 2259 if (!cmd_sent){ 2260 cmd_sent = call_setup_state_machine(hfp_connection); 2261 } 2262 2263 if (!cmd_sent){ 2264 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2265 } 2266 2267 if (!cmd_sent){ 2268 cmd_sent = hfp_ag_run_ring_and_clip(hfp_connection); 2269 } 2270 2271 if (!cmd_sent){ 2272 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2273 } 2274 2275 // disconnect 2276 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2277 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2278 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2279 } 2280 2281 if (cmd_sent){ 2282 hfp_connection->command = HFP_CMD_NONE; 2283 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2284 } 2285 } 2286 2287 static int hfp_parser_is_end_of_line(uint8_t byte){ 2288 return (byte == '\n') || (byte == '\r'); 2289 } 2290 2291 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2292 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2293 if (size < 1) return; 2294 uint8_t status = ERROR_CODE_SUCCESS; 2295 2296 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2297 #ifdef ENABLE_HFP_AT_MESSAGES 2298 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2299 #endif 2300 2301 // process messages byte-wise 2302 int pos; 2303 for (pos = 0; pos < size ; pos++){ 2304 hfp_parse(hfp_connection, packet[pos], 0); 2305 2306 // parse until end of line 2307 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2308 2309 hfp_generic_status_indicator_t * indicator; 2310 switch(hfp_connection->command){ 2311 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2312 hfp_connection->command = HFP_CMD_NONE; 2313 hfp_connection->ag_vra_requested_by_hf = true; 2314 break; 2315 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2316 hfp_connection->command = HFP_CMD_NONE; 2317 if (hfp_ag_response_and_hold_active){ 2318 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2319 } 2320 hfp_connection->ok_pending = 1; 2321 break; 2322 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2323 hfp_connection->command = HFP_CMD_NONE; 2324 switch(hfp_connection->ag_response_and_hold_action){ 2325 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2326 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2327 break; 2328 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2329 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2330 break; 2331 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2332 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2333 break; 2334 default: 2335 break; 2336 } 2337 hfp_connection->ok_pending = 1; 2338 break; 2339 case HFP_CMD_HF_INDICATOR_STATUS: 2340 hfp_connection->command = HFP_CMD_NONE; 2341 2342 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2343 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2344 switch (indicator->uuid){ 2345 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2346 if (hfp_connection->parser_indicator_value > 1) { 2347 hfp_connection->send_error = 1; 2348 break; 2349 } 2350 hfp_connection->ok_pending = 1; 2351 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2352 break; 2353 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2354 if (hfp_connection->parser_indicator_value > 100){ 2355 hfp_connection->send_error = 1; 2356 break; 2357 } 2358 hfp_connection->ok_pending = 1; 2359 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2360 break; 2361 default: 2362 hfp_connection->send_error = 1; 2363 break; 2364 } 2365 } else { 2366 hfp_connection->send_error = 1; 2367 } 2368 break; 2369 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2370 // expected by SLC state machine 2371 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2372 hfp_connection->send_ag_indicators_segment = 0; 2373 hfp_connection->send_ag_status_indicators = 1; 2374 break; 2375 case HFP_CMD_LIST_CURRENT_CALLS: 2376 hfp_connection->command = HFP_CMD_NONE; 2377 hfp_connection->next_call_index = 0; 2378 hfp_connection->send_status_of_current_calls = 1; 2379 break; 2380 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2381 hfp_connection->command = HFP_CMD_NONE; 2382 if (hfp_ag_subscriber_numbers_count == 0){ 2383 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2384 break; 2385 } 2386 hfp_connection->next_subscriber_number_to_send = 0; 2387 hfp_connection->send_subscriber_number = 1; 2388 break; 2389 case HFP_CMD_TRANSMIT_DTMF_CODES: 2390 { 2391 hfp_connection->command = HFP_CMD_NONE; 2392 char buffer[2]; 2393 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2394 buffer[1] = 0; 2395 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2396 break; 2397 } 2398 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2399 hfp_connection->command = HFP_CMD_NONE; 2400 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2401 break; 2402 case HFP_CMD_TURN_OFF_EC_AND_NR: 2403 hfp_connection->command = HFP_CMD_NONE; 2404 2405 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2406 hfp_connection->ok_pending = 1; 2407 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2408 status = ERROR_CODE_SUCCESS; 2409 } else { 2410 hfp_connection->send_error = 1; 2411 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2412 } 2413 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2414 break; 2415 case HFP_CMD_CALL_ANSWERED: 2416 hfp_connection->command = HFP_CMD_NONE; 2417 log_info("HFP: ATA"); 2418 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2419 break; 2420 case HFP_CMD_HANG_UP_CALL: 2421 hfp_connection->command = HFP_CMD_NONE; 2422 hfp_connection->ok_pending = 1; 2423 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2424 break; 2425 case HFP_CMD_CALL_HOLD: { 2426 hfp_connection->command = HFP_CMD_NONE; 2427 hfp_connection->ok_pending = 1; 2428 2429 switch (hfp_connection->ag_call_hold_action){ 2430 case 0: 2431 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2432 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2433 break; 2434 case 1: 2435 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2436 // Where both a held and a waiting call exist, the above procedures shall apply to the 2437 // waiting call (i.e., not to the held call) in conflicting situation. 2438 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2439 break; 2440 case 2: 2441 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2442 // Where both a held and a waiting call exist, the above procedures shall apply to the 2443 // waiting call (i.e., not to the held call) in conflicting situation. 2444 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2445 break; 2446 case 3: 2447 // Adds a held call to the conversation. 2448 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2449 break; 2450 case 4: 2451 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2452 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2453 break; 2454 default: 2455 break; 2456 } 2457 hfp_connection->call_index = 0; 2458 break; 2459 } 2460 case HFP_CMD_CALL_PHONE_NUMBER: 2461 hfp_connection->command = HFP_CMD_NONE; 2462 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2463 break; 2464 case HFP_CMD_REDIAL_LAST_NUMBER: 2465 hfp_connection->command = HFP_CMD_NONE; 2466 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2467 break; 2468 case HFP_CMD_ENABLE_CLIP: 2469 hfp_connection->command = HFP_CMD_NONE; 2470 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2471 hfp_connection->ok_pending = 1; 2472 break; 2473 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2474 hfp_connection->command = HFP_CMD_NONE; 2475 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2476 hfp_connection->ok_pending = 1; 2477 break; 2478 case HFP_CMD_SET_SPEAKER_GAIN: 2479 hfp_connection->command = HFP_CMD_NONE; 2480 hfp_connection->ok_pending = 1; 2481 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2482 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2483 break; 2484 case HFP_CMD_SET_MICROPHONE_GAIN: 2485 hfp_connection->command = HFP_CMD_NONE; 2486 hfp_connection->ok_pending = 1; 2487 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2488 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2489 break; 2490 case HFP_CMD_UNKNOWN: 2491 hfp_connection->command = HFP_CMD_NONE; 2492 hfp_connection->send_error = 1; 2493 break; 2494 default: 2495 break; 2496 } 2497 } 2498 } 2499 2500 static void hfp_ag_run(void){ 2501 btstack_linked_list_iterator_t it; 2502 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2503 while (btstack_linked_list_iterator_has_next(&it)){ 2504 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2505 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2506 hfp_ag_run_for_context(hfp_connection); 2507 } 2508 } 2509 2510 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2511 hfp_connection_t * hfp_connection = NULL; 2512 switch (packet_type){ 2513 case RFCOMM_DATA_PACKET: 2514 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2515 btstack_assert(hfp_connection != NULL); 2516 2517 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2518 hfp_ag_run_for_context(hfp_connection); 2519 return; 2520 case HCI_EVENT_PACKET: 2521 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2522 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2523 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2524 btstack_assert(hfp_connection != NULL); 2525 2526 hfp_ag_run_for_context(hfp_connection); 2527 return; 2528 } 2529 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2530 break; 2531 default: 2532 break; 2533 } 2534 2535 hfp_ag_run(); 2536 } 2537 2538 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2539 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2540 hfp_ag_run(); 2541 } 2542 2543 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2544 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2545 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2546 return; 2547 } 2548 int i; 2549 hfp_ag_codecs_nr = codecs_nr; 2550 for (i=0; i < codecs_nr; i++){ 2551 hfp_ag_codecs[i] = codecs[i]; 2552 } 2553 } 2554 2555 void hfp_ag_init_supported_features(uint32_t supported_features){ 2556 hfp_ag_supported_features = supported_features; 2557 } 2558 2559 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2560 hfp_ag_indicators_nr = ag_indicators_nr; 2561 (void)memcpy(hfp_ag_indicators, ag_indicators, 2562 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2563 } 2564 2565 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2566 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2567 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2568 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2569 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2570 } 2571 2572 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2573 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2574 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2575 call_hold_services_nr * sizeof(char *)); 2576 } 2577 2578 2579 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2580 2581 hfp_init(); 2582 hfp_ag_call_hold_services_nr = 0; 2583 hfp_ag_response_and_hold_active = false; 2584 hfp_ag_indicators_nr = 0; 2585 hfp_ag_codecs_nr = 0; 2586 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2587 hfp_ag_subscriber_numbers = NULL; 2588 hfp_ag_subscriber_numbers_count = 0; 2589 2590 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2591 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2592 2593 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2594 2595 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2596 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2597 2598 hfp_gsm_init(); 2599 } 2600 2601 void hfp_ag_deinit(void){ 2602 hfp_deinit(); 2603 hfp_gsm_deinit(); 2604 2605 hfp_ag_callback = NULL; 2606 hfp_ag_supported_features = 0; 2607 hfp_ag_codecs_nr = 0; 2608 hfp_ag_indicators_nr = 0; 2609 hfp_ag_call_hold_services_nr = 0; 2610 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2611 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2612 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2613 hfp_ag_subscriber_numbers = NULL; 2614 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2615 hfp_ag_custom_call_sm_handler = NULL; 2616 } 2617 2618 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2619 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2620 } 2621 2622 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2623 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2624 if (!hfp_connection){ 2625 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2626 } 2627 2628 hfp_trigger_release_service_level_connection(hfp_connection); 2629 hfp_ag_run_for_context(hfp_connection); 2630 return ERROR_CODE_SUCCESS; 2631 } 2632 2633 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2634 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2635 if (!hfp_connection){ 2636 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2637 } 2638 2639 hfp_connection->extended_audio_gateway_error = 0; 2640 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2641 return ERROR_CODE_COMMAND_DISALLOWED; 2642 } 2643 2644 hfp_connection->extended_audio_gateway_error = error; 2645 hfp_ag_run_for_context(hfp_connection); 2646 return ERROR_CODE_SUCCESS; 2647 } 2648 2649 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2650 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2651 return ERROR_CODE_COMMAND_DISALLOWED; 2652 } 2653 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2654 return ERROR_CODE_COMMAND_DISALLOWED; 2655 } 2656 2657 hfp_connection->establish_audio_connection = 1; 2658 if (!has_codec_negotiation_feature(hfp_connection)){ 2659 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2660 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2661 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2662 // now, pick link settings 2663 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2664 #ifdef ENABLE_CC256X_ASSISTED_HFP 2665 hfp_cc256x_prepare_for_sco(hfp_connection); 2666 #endif 2667 return ERROR_CODE_SUCCESS; 2668 } 2669 2670 uint8_t i; 2671 bool codec_was_in_use = false; 2672 bool better_codec_can_be_used = false; 2673 2674 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2675 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2676 codec_was_in_use = true; 2677 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2678 better_codec_can_be_used = true; 2679 } 2680 } 2681 2682 if (!codec_was_in_use || better_codec_can_be_used){ 2683 hfp_connection->ag_send_common_codec = true; 2684 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2685 } 2686 return ERROR_CODE_SUCCESS; 2687 } 2688 2689 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2690 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2691 if (!hfp_connection){ 2692 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2693 } 2694 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2695 if (status != ERROR_CODE_SUCCESS){ 2696 return status; 2697 } 2698 hfp_ag_run_for_context(hfp_connection); 2699 return ERROR_CODE_SUCCESS; 2700 } 2701 2702 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2703 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2704 if (!hfp_connection){ 2705 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2706 } 2707 2708 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2709 return ERROR_CODE_COMMAND_DISALLOWED; 2710 } 2711 2712 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2713 if (status == ERROR_CODE_SUCCESS){ 2714 hfp_ag_run_for_context(hfp_connection); 2715 } 2716 return status; 2717 } 2718 2719 /** 2720 * @brief Enable in-band ring tone 2721 */ 2722 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2723 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2724 return; 2725 } 2726 2727 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2728 2729 btstack_linked_list_iterator_t it; 2730 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2731 while (btstack_linked_list_iterator_has_next(&it)){ 2732 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2733 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2734 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2735 hfp_ag_run_for_context(hfp_connection); 2736 } 2737 } 2738 2739 /** 2740 * @brief Called from GSM 2741 */ 2742 void hfp_ag_incoming_call(void){ 2743 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2744 } 2745 2746 void hfp_ag_outgoing_call_initiated(void) { 2747 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2748 } 2749 2750 /** 2751 * @brief number is stored. 2752 */ 2753 void hfp_ag_set_clip(uint8_t type, const char * number){ 2754 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2755 } 2756 2757 void hfp_ag_call_dropped(void){ 2758 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2759 } 2760 2761 // call from AG UI 2762 void hfp_ag_answer_incoming_call(void){ 2763 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2764 } 2765 2766 void hfp_ag_join_held_call(void){ 2767 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2768 } 2769 2770 void hfp_ag_terminate_call(void){ 2771 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2772 } 2773 2774 void hfp_ag_outgoing_call_ringing(void){ 2775 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2776 } 2777 2778 void hfp_ag_outgoing_call_established(void){ 2779 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2780 } 2781 2782 void hfp_ag_outgoing_call_rejected(void){ 2783 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2784 } 2785 2786 void hfp_ag_outgoing_call_accepted(void){ 2787 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2788 } 2789 2790 void hfp_ag_hold_incoming_call(void){ 2791 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2792 } 2793 2794 void hfp_ag_accept_held_incoming_call(void) { 2795 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2796 } 2797 2798 void hfp_ag_reject_held_incoming_call(void){ 2799 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2800 } 2801 2802 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2803 int indicator_index = get_ag_indicator_index_for_name(name); 2804 if (indicator_index < 0) return; 2805 hfp_ag_indicators[indicator_index].status = value; 2806 2807 btstack_linked_list_iterator_t it; 2808 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2809 while (btstack_linked_list_iterator_has_next(&it)){ 2810 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2811 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2812 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2813 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2814 continue; 2815 } 2816 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2817 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2818 hfp_ag_run_for_context(hfp_connection); 2819 } 2820 } 2821 2822 uint8_t hfp_ag_set_registration_status(int registration_status){ 2823 if ((registration_status < 0) || (registration_status > 1)){ 2824 return ERROR_CODE_COMMAND_DISALLOWED; 2825 } 2826 2827 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2828 2829 // if network goes away wihle a call is active: 2830 // - the call gets dropped 2831 // - we send NO CARRIER 2832 // NOTE: the CALL=0 has to be sent before NO CARRIER 2833 2834 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2835 2836 btstack_linked_list_iterator_t it; 2837 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2838 while (btstack_linked_list_iterator_has_next(&it)){ 2839 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2840 hfp_connection->ag_send_no_carrier = true; 2841 } 2842 } 2843 hfp_ag_set_ag_indicator("service", registration_status); 2844 return ERROR_CODE_SUCCESS; 2845 } 2846 2847 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2848 if ((signal_strength < 0) || (signal_strength > 5)){ 2849 return ERROR_CODE_COMMAND_DISALLOWED; 2850 } 2851 2852 hfp_ag_set_ag_indicator("signal", signal_strength); 2853 return ERROR_CODE_SUCCESS; 2854 } 2855 2856 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2857 if ((roaming_status < 0) || (roaming_status > 1)){ 2858 return ERROR_CODE_COMMAND_DISALLOWED; 2859 } 2860 2861 hfp_ag_set_ag_indicator("roam", roaming_status); 2862 return ERROR_CODE_SUCCESS; 2863 } 2864 2865 uint8_t hfp_ag_set_battery_level(int battery_level){ 2866 if ((battery_level < 0) || (battery_level > 5)){ 2867 return ERROR_CODE_COMMAND_DISALLOWED; 2868 } 2869 hfp_ag_set_ag_indicator("battchg", battery_level); 2870 return ERROR_CODE_SUCCESS; 2871 } 2872 2873 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2874 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2875 if (!hfp_connection){ 2876 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2877 } 2878 2879 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2880 return ERROR_CODE_COMMAND_DISALLOWED; 2881 } 2882 2883 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2884 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2885 if (!enhanced_vra_supported && !legacy_vra_supported){ 2886 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2887 } 2888 2889 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2890 return ERROR_CODE_COMMAND_DISALLOWED; 2891 } 2892 2893 hfp_connection->ag_activate_voice_recognition_value = 1; 2894 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2895 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2896 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2897 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2898 hfp_connection->ag_vra_send_command = true; 2899 hfp_ag_run_for_context(hfp_connection); 2900 return ERROR_CODE_SUCCESS; 2901 } 2902 2903 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2904 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2905 if (!hfp_connection){ 2906 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2907 } 2908 2909 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2910 return ERROR_CODE_COMMAND_DISALLOWED; 2911 } 2912 2913 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2914 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2915 2916 if (!enhanced_vra_supported && !legacy_vra_supported){ 2917 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2918 } 2919 2920 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2921 return ERROR_CODE_COMMAND_DISALLOWED; 2922 } 2923 2924 hfp_connection->ag_activate_voice_recognition_value = 0; 2925 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2926 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2927 hfp_connection->ag_vra_send_command = true; 2928 hfp_ag_run_for_context(hfp_connection); 2929 return ERROR_CODE_SUCCESS; 2930 } 2931 2932 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2933 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2934 if (!hfp_connection){ 2935 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2936 } 2937 2938 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2939 return ERROR_CODE_COMMAND_DISALLOWED; 2940 } 2941 2942 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2943 return ERROR_CODE_COMMAND_DISALLOWED; 2944 } 2945 2946 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2947 return ERROR_CODE_COMMAND_DISALLOWED; 2948 } 2949 2950 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2951 if (!enhanced_vra_supported ){ 2952 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2953 } 2954 2955 2956 hfp_connection->ag_vra_state = state; 2957 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2958 hfp_connection->ag_vra_send_command = true; 2959 hfp_ag_run_for_context(hfp_connection); 2960 return ERROR_CODE_SUCCESS; 2961 } 2962 2963 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2964 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2965 } 2966 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2967 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2968 } 2969 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2970 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2971 } 2972 2973 2974 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){ 2975 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2976 if (!hfp_connection){ 2977 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2978 } 2979 2980 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2981 return ERROR_CODE_COMMAND_DISALLOWED; 2982 } 2983 2984 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2985 return ERROR_CODE_COMMAND_DISALLOWED; 2986 } 2987 2988 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2989 return ERROR_CODE_COMMAND_DISALLOWED; 2990 } 2991 2992 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2993 if (!enhanced_vra_supported ){ 2994 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2995 } 2996 2997 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 2998 if (!enhanced_vra_msg_supported ){ 2999 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3000 } 3001 3002 uint16_t message_len = strlen(msg.text); 3003 3004 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 3005 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3006 } 3007 3008 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 3009 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3010 } 3011 3012 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 3013 hfp_connection->ag_msg = msg; 3014 hfp_connection->ag_vra_state = state; 3015 hfp_connection->ag_vra_send_command = true; 3016 hfp_ag_run_for_context(hfp_connection); 3017 3018 return ERROR_CODE_SUCCESS; 3019 } 3020 3021 3022 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3023 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3024 if (!hfp_connection){ 3025 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3026 } 3027 3028 if ((gain < 0) || (gain > 15)){ 3029 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3030 return ERROR_CODE_COMMAND_DISALLOWED; 3031 } 3032 3033 if (hfp_connection->microphone_gain != gain){ 3034 hfp_connection->microphone_gain = gain; 3035 hfp_connection->send_microphone_gain = 1; 3036 } 3037 hfp_ag_run_for_context(hfp_connection); 3038 return ERROR_CODE_SUCCESS; 3039 } 3040 3041 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3042 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3043 if (!hfp_connection){ 3044 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3045 } 3046 3047 if ((gain < 0) || (gain > 15)){ 3048 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3049 return ERROR_CODE_COMMAND_DISALLOWED; 3050 } 3051 3052 if (hfp_connection->speaker_gain != gain){ 3053 hfp_connection->speaker_gain = gain; 3054 hfp_connection->send_speaker_gain = 1; 3055 } 3056 hfp_ag_run_for_context(hfp_connection); 3057 return ERROR_CODE_SUCCESS; 3058 } 3059 3060 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3061 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3062 if (!hfp_connection){ 3063 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3064 } 3065 3066 hfp_ag_set_clip(0, number); 3067 hfp_connection->send_phone_number_for_voice_tag = 1; 3068 return ERROR_CODE_SUCCESS; 3069 } 3070 3071 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3072 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3073 if (!hfp_connection){ 3074 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3075 } 3076 3077 hfp_connection->send_error = 1; 3078 return ERROR_CODE_SUCCESS; 3079 } 3080 3081 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3082 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3083 if (!hfp_connection){ 3084 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3085 } 3086 3087 hfp_connection->ok_pending = 1; 3088 return ERROR_CODE_SUCCESS; 3089 } 3090 3091 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3092 hfp_ag_subscriber_numbers = numbers; 3093 hfp_ag_subscriber_numbers_count = numbers_count; 3094 } 3095 3096 void hfp_ag_clear_last_dialed_number(void){ 3097 hfp_gsm_clear_last_dialed_number(); 3098 } 3099 3100 void hfp_ag_set_last_dialed_number(const char * number){ 3101 hfp_gsm_set_last_dialed_number(number); 3102 } 3103 3104 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3105 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3106 if (!hfp_connection){ 3107 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3108 } 3109 3110 if (!hfp_connection->call_waiting_notification_enabled){ 3111 return ERROR_CODE_COMMAND_DISALLOWED; 3112 } 3113 3114 hfp_connection->ag_notify_incoming_call_waiting = 1; 3115 hfp_ag_run_for_context(hfp_connection); 3116 return ERROR_CODE_SUCCESS; 3117 } 3118 3119 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){ 3120 if (!name){ 3121 name = hfp_ag_default_service_name; 3122 } 3123 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3124 3125 /* 3126 * 0x01 – Ability to reject a call 3127 * 0x00 – No ability to reject a call 3128 */ 3129 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3130 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3131 3132 // Construct SupportedFeatures for SDP bitmap: 3133 // 3134 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3135 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3136 // 3137 // Wide band speech (bit 5) requires Codec negotiation 3138 // 3139 uint16_t sdp_features = supported_features & 0x1f; 3140 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3141 sdp_features |= 1 << 5; 3142 } 3143 3144 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3145 sdp_features |= 1 << 6; 3146 } 3147 3148 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3149 sdp_features |= 1 << 7; 3150 } 3151 3152 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3153 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3154 } 3155 3156 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3157 btstack_assert(callback != NULL); 3158 3159 hfp_ag_callback = callback; 3160 hfp_set_ag_callback(callback); 3161 } 3162 3163 void hfp_ag_register_custom_call_sm_handler(bool (*handler)(hfp_ag_call_event_t event)){ 3164 hfp_ag_custom_call_sm_handler = handler; 3165 } 3166