1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hfp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HFP Audio Gateway (AG) unit 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "hci_cmd.h" 53 #include "btstack_run_loop.h" 54 55 #include "bluetooth_sdp.h" 56 #include "hci.h" 57 #include "btstack_memory.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 #include "btstack_debug.h" 61 #include "btstack_event.h" 62 #include "classic/core.h" 63 #include "classic/hfp.h" 64 #include "classic/hfp_ag.h" 65 #include "classic/hfp_gsm_model.h" 66 #include "classic/sdp_client_rfcomm.h" 67 #include "classic/sdp_server.h" 68 #include "classic/sdp_util.h" 69 70 // private prototypes 71 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection); 72 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection); 73 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection); 74 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection); 75 76 // public prototypes 77 hfp_generic_status_indicator_t * get_hfp_generic_status_indicators(void); 78 int get_hfp_generic_status_indicators_nr(void); 79 void set_hfp_generic_status_indicators(hfp_generic_status_indicator_t * indicators, int indicator_nr); 80 void set_hfp_ag_indicators(hfp_ag_indicator_t * indicators, int indicator_nr); 81 int get_hfp_ag_indicators_nr(hfp_connection_t * context); 82 hfp_ag_indicator_t * get_hfp_ag_indicators(hfp_connection_t * context); 83 84 #define HFP_SUBEVENT_INVALID 0xFFFF 85 86 // const 87 static const char hfp_ag_default_service_name[] = "Voice gateway"; 88 89 // globals 90 91 // higher layer callbacks 92 static btstack_packet_handler_t hfp_ag_callback; 93 94 static bool (*hfp_ag_custom_call_sm_handler)(hfp_ag_call_event_t event); 95 96 static btstack_packet_callback_registration_t hfp_ag_hci_event_callback_registration; 97 98 static uint16_t hfp_ag_supported_features; 99 100 // codecs 101 static uint8_t hfp_ag_codecs_nr; 102 static uint8_t hfp_ag_codecs[HFP_MAX_NUM_CODECS]; 103 104 // AG indicators 105 static int hfp_ag_indicators_nr; 106 static hfp_ag_indicator_t hfp_ag_indicators[HFP_MAX_NUM_INDICATORS]; 107 108 // generic status indicators 109 static int hfp_ag_generic_status_indicators_nr; 110 static hfp_generic_status_indicator_t hfp_ag_generic_status_indicators[HFP_MAX_NUM_INDICATORS]; 111 112 static int hfp_ag_call_hold_services_nr; 113 static char * hfp_ag_call_hold_services[6]; 114 115 static hfp_response_and_hold_state_t hfp_ag_response_and_hold_state; 116 static bool hfp_ag_response_and_hold_active = false; 117 118 // Subscriber information entries 119 static hfp_phone_number_t * hfp_ag_subscriber_numbers; 120 static int hfp_ag_subscriber_numbers_count; 121 122 // call state 123 static btstack_timer_source_t hfp_ag_ring_timeout; 124 125 // code 126 static int hfp_ag_get_ag_indicators_nr(hfp_connection_t * hfp_connection){ 127 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 128 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 129 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 130 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 131 } 132 return hfp_connection->ag_indicators_nr; 133 } 134 135 hfp_ag_indicator_t * hfp_ag_get_ag_indicators(hfp_connection_t * hfp_connection){ 136 // TODO: save only value, and value changed in the hfp_connection? 137 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 138 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 139 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 140 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 141 } 142 return (hfp_ag_indicator_t *)&(hfp_connection->ag_indicators); 143 } 144 145 static hfp_ag_indicator_t * get_ag_indicator_for_name(const char * name){ 146 int i; 147 for (i = 0; i < hfp_ag_indicators_nr; i++){ 148 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 149 return &hfp_ag_indicators[i]; 150 } 151 } 152 return NULL; 153 } 154 155 static int get_ag_indicator_index_for_name(const char * name){ 156 int i; 157 for (i = 0; i < hfp_ag_indicators_nr; i++){ 158 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 159 return i; 160 } 161 } 162 return -1; 163 } 164 165 static hfp_connection_t * get_hfp_ag_connection_context_for_acl_handle(uint16_t handle){ 166 btstack_linked_list_iterator_t it; 167 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 168 while (btstack_linked_list_iterator_has_next(&it)){ 169 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 170 if (hfp_connection->acl_handle != handle) continue; 171 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 172 return hfp_connection; 173 } 174 return NULL; 175 } 176 177 static int use_in_band_tone(void){ 178 return get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE); 179 } 180 181 static int has_codec_negotiation_feature(hfp_connection_t * hfp_connection){ 182 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_CODEC_NEGOTIATION); 183 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_CODEC_NEGOTIATION); 184 return hf && ag; 185 } 186 187 static int has_call_waiting_and_3way_calling_feature(hfp_connection_t * hfp_connection){ 188 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_THREE_WAY_CALLING); 189 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_THREE_WAY_CALLING); 190 return hf && ag; 191 } 192 193 static int has_hf_indicators_feature(hfp_connection_t * hfp_connection){ 194 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_HF_INDICATORS); 195 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_HF_INDICATORS); 196 return hf && ag; 197 } 198 199 /* unsolicited responses */ 200 201 static int hfp_ag_send_change_in_band_ring_tone_setting_cmd(uint16_t cid){ 202 char buffer[20]; 203 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", 204 HFP_CHANGE_IN_BAND_RING_TONE_SETTING, use_in_band_tone()); 205 buffer[sizeof(buffer) - 1] = 0; 206 return send_str_over_rfcomm(cid, buffer); 207 } 208 209 static int hfp_ag_exchange_supported_features_cmd(uint16_t cid){ 210 char buffer[40]; 211 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n\r\nOK\r\n", 212 HFP_SUPPORTED_FEATURES, hfp_ag_supported_features); 213 buffer[sizeof(buffer) - 1] = 0; 214 return send_str_over_rfcomm(cid, buffer); 215 } 216 217 static int hfp_ag_send_ok(uint16_t cid){ 218 char buffer[10]; 219 snprintf(buffer, sizeof(buffer), "\r\nOK\r\n"); 220 buffer[sizeof(buffer) - 1] = 0; 221 return send_str_over_rfcomm(cid, buffer); 222 } 223 224 static int hfp_ag_send_ring(uint16_t cid){ 225 return send_str_over_rfcomm(cid, (char *) "\r\nRING\r\n"); 226 } 227 228 static int hfp_ag_send_no_carrier(uint16_t cid){ 229 char buffer[15]; 230 snprintf(buffer, sizeof(buffer), "\r\nNO CARRIER\r\n"); 231 buffer[sizeof(buffer) - 1] = 0; 232 return send_str_over_rfcomm(cid, buffer); 233 } 234 235 static int hfp_ag_send_clip(uint16_t cid){ 236 char buffer[50]; 237 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", HFP_ENABLE_CLIP, 238 hfp_gsm_clip_number(), hfp_gsm_clip_type()); 239 buffer[sizeof(buffer) - 1] = 0; 240 return send_str_over_rfcomm(cid, buffer); 241 } 242 243 static int hfp_send_subscriber_number_cmd(uint16_t cid, uint8_t type, const char * number){ 244 char buffer[50]; 245 snprintf(buffer, sizeof(buffer), "\r\n%s: ,\"%s\",%u, , \r\n", 246 HFP_SUBSCRIBER_NUMBER_INFORMATION, number, type); 247 buffer[sizeof(buffer) - 1] = 0; 248 return send_str_over_rfcomm(cid, buffer); 249 } 250 251 static int hfp_ag_send_phone_number_for_voice_tag_cmd(uint16_t cid){ 252 char buffer[50]; 253 snprintf(buffer, sizeof(buffer), "\r\n%s: %s\r\n", 254 HFP_PHONE_NUMBER_FOR_VOICE_TAG, hfp_gsm_clip_number()); 255 buffer[sizeof(buffer) - 1] = 0; 256 return send_str_over_rfcomm(cid, buffer); 257 } 258 259 static int hfp_ag_send_call_waiting_notification(uint16_t cid){ 260 char buffer[50]; 261 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", 262 HFP_ENABLE_CALL_WAITING_NOTIFICATION, hfp_gsm_clip_number(), 263 hfp_gsm_clip_type()); 264 buffer[sizeof(buffer) - 1] = 0; 265 return send_str_over_rfcomm(cid, buffer); 266 } 267 268 static int hfp_ag_send_error(uint16_t cid){ 269 char buffer[10]; 270 snprintf(buffer, sizeof(buffer), "\r\nERROR\r\n"); 271 buffer[sizeof(buffer) - 1] = 0; 272 return send_str_over_rfcomm(cid, buffer); 273 } 274 275 static int hfp_ag_send_report_extended_audio_gateway_error(uint16_t cid, uint8_t error){ 276 char buffer[20]; 277 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 278 HFP_EXTENDED_AUDIO_GATEWAY_ERROR, error); 279 buffer[sizeof(buffer) - 1] = 0; 280 return send_str_over_rfcomm(cid, buffer); 281 } 282 283 // get size for indicator string 284 static int hfp_ag_indicators_string_size(hfp_connection_t * hfp_connection, int i){ 285 // template: ("$NAME",($MIN,$MAX)) 286 return 8 + (int) strlen(hfp_ag_get_ag_indicators(hfp_connection)[i].name) 287 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range) 288 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range); 289 } 290 291 // store indicator 292 static void hfp_ag_indicators_string_store(hfp_connection_t * hfp_connection, int i, uint8_t * buffer, uint16_t buffer_size){ 293 snprintf((char *)buffer, buffer_size, "(\"%s\",(%d,%d)),", 294 hfp_ag_get_ag_indicators(hfp_connection)[i].name, 295 hfp_ag_get_ag_indicators(hfp_connection)[i].min_range, 296 hfp_ag_get_ag_indicators(hfp_connection)[i].max_range); 297 ((char *)buffer)[buffer_size - 1] = 0; 298 } 299 300 // structure: header [indicator [comma indicator]] footer 301 static int hfp_ag_indicators_cmd_generator_num_segments(hfp_connection_t * hfp_connection){ 302 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 303 if (!num_indicators) return 2; 304 return 3 + ((num_indicators-1) * 2); 305 } 306 307 // get size of individual segment for hfp_ag_retrieve_indicators_cmd 308 static int hfp_ag_indicators_cmd_generator_get_segment_len(hfp_connection_t * hfp_connection, int index){ 309 if (index == 0) { 310 return (uint16_t) strlen(HFP_INDICATOR) + 3; // "\n\r%s:"" 311 } 312 index--; 313 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 314 int indicator_index = index >> 1; 315 if ((index & 1) == 0){ 316 return hfp_ag_indicators_string_size(hfp_connection, indicator_index); 317 } 318 if (indicator_index == (num_indicators - 1)){ 319 return 8; // "\r\n\r\nOK\r\n" 320 } 321 return 1; // comma 322 } 323 324 static void hfp_ag_indicators_cmd_generator_store_segment(hfp_connection_t * hfp_connection, int index, uint8_t * buffer, uint16_t buffer_size){ 325 if (index == 0){ 326 *buffer++ = '\r'; 327 *buffer++ = '\n'; 328 int len = (uint16_t) strlen(HFP_INDICATOR); 329 (void)memcpy(buffer, HFP_INDICATOR, len); 330 buffer += len; 331 *buffer++ = ':'; 332 return; 333 } 334 index--; 335 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 336 int indicator_index = index >> 1; 337 if ((index & 1) == 0){ 338 hfp_ag_indicators_string_store(hfp_connection, indicator_index, buffer, buffer_size); 339 return; 340 } 341 if (indicator_index == (num_indicators-1)){ 342 (void)memcpy(buffer, "\r\n\r\nOK\r\n", 8); 343 return; 344 } 345 *buffer = ','; 346 } 347 348 static int hfp_ag_generic_indicators_join(char * buffer, int buffer_size){ 349 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 350 int i; 351 int offset = 0; 352 for (i = 0; i < (hfp_ag_generic_status_indicators_nr - 1); i++) { 353 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_generic_status_indicators[i].uuid); 354 } 355 if (i < hfp_ag_generic_status_indicators_nr){ 356 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_generic_status_indicators[i].uuid); 357 } 358 return offset; 359 } 360 361 static int hfp_ag_generic_indicators_initial_status_join(char * buffer, int buffer_size){ 362 if (buffer_size < (hfp_ag_generic_status_indicators_nr * 3)) return 0; 363 int i; 364 int offset = 0; 365 for (i = 0; i < hfp_ag_generic_status_indicators_nr; i++) { 366 offset += snprintf(buffer+offset, buffer_size-offset, "\r\n%s:%d,%d\r\n", HFP_GENERIC_STATUS_INDICATOR, hfp_ag_generic_status_indicators[i].uuid, hfp_ag_generic_status_indicators[i].state); 367 } 368 return offset; 369 } 370 371 static int hfp_ag_indicators_status_join(char * buffer, int buffer_size){ 372 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 373 int i; 374 int offset = 0; 375 for (i = 0; i < (hfp_ag_indicators_nr-1); i++) { 376 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_indicators[i].status); 377 } 378 if (i<hfp_ag_indicators_nr){ 379 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_indicators[i].status); 380 } 381 return offset; 382 } 383 384 static int hfp_ag_call_services_join(char * buffer, int buffer_size){ 385 if (buffer_size < (hfp_ag_call_hold_services_nr * 3)) return 0; 386 int i; 387 int offset = snprintf(buffer, buffer_size, "("); 388 for (i = 0; i < (hfp_ag_call_hold_services_nr-1); i++) { 389 offset += snprintf(buffer+offset, buffer_size-offset, "%s,", hfp_ag_call_hold_services[i]); 390 } 391 if (i<hfp_ag_call_hold_services_nr){ 392 offset += snprintf(buffer+offset, buffer_size-offset, "%s)", hfp_ag_call_hold_services[i]); 393 } 394 return offset; 395 } 396 397 static int hfp_ag_send_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, 398 int start_segment, int num_segments, 399 int (*get_segment_len)(hfp_connection_t * hfp_connection, int segment), 400 void (*store_segment) (hfp_connection_t * hfp_connection, int segment, uint8_t * buffer, uint16_t buffer_size)){ 401 402 // assumes: can send now == true 403 // assumes: num segments > 0 404 // assumes: individual segments are smaller than MTU 405 rfcomm_reserve_packet_buffer(); 406 int mtu = rfcomm_get_max_frame_size(cid); 407 uint8_t * data = rfcomm_get_outgoing_buffer(); 408 int offset = 0; 409 int segment = start_segment; 410 while (segment < num_segments){ 411 int segment_len = get_segment_len(hfp_connection, segment); 412 if ((offset + segment_len + 1) > mtu) break; 413 // append segment. As it appends a '\0', we provide a buffer one byte larger 414 store_segment(hfp_connection, segment, data+offset, segment_len + 1); 415 offset += segment_len; 416 segment++; 417 } 418 rfcomm_send_prepared(cid, offset); 419 #ifdef ENABLE_HFP_AT_MESSAGES 420 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_SENT, (char *) data); 421 #endif 422 return segment; 423 } 424 425 // returns next segment to store 426 static int hfp_ag_send_retrieve_indicators_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, int start_segment){ 427 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 428 return hfp_ag_send_cmd_via_generator(cid, hfp_connection, start_segment, num_segments, 429 hfp_ag_indicators_cmd_generator_get_segment_len, 430 hfp_ag_indicators_cmd_generator_store_segment); 431 } 432 433 static int hfp_ag_send_retrieve_indicators_status_cmd(uint16_t cid){ 434 char buffer[40]; 435 const int size = sizeof(buffer); 436 int offset = snprintf(buffer, size, "\r\n%s:", HFP_INDICATOR); 437 offset += hfp_ag_indicators_status_join(buffer+offset, size-offset-9); 438 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 439 return send_str_over_rfcomm(cid, buffer); 440 } 441 442 static int hfp_ag_send_retrieve_can_hold_call_cmd(uint16_t cid){ 443 char buffer[40]; 444 const int size = sizeof(buffer); 445 int offset = snprintf(buffer, size, "\r\n%s:", HFP_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES); 446 offset += hfp_ag_call_services_join(buffer+offset, size-offset-9); 447 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 448 return send_str_over_rfcomm(cid, buffer); 449 } 450 451 452 static int hfp_ag_send_list_supported_generic_status_indicators_cmd(uint16_t cid){ 453 return hfp_ag_send_ok(cid); 454 } 455 456 static int hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(uint16_t cid){ 457 char buffer[40]; 458 const int size = sizeof(buffer); 459 int offset = snprintf(buffer, size, "\r\n%s:(", HFP_GENERIC_STATUS_INDICATOR); 460 offset += hfp_ag_generic_indicators_join(buffer + offset, size - offset - 10); 461 offset += snprintf(buffer+offset, size-offset, ")\r\n\r\nOK\r\n"); 462 return send_str_over_rfcomm(cid, buffer); 463 } 464 465 static int hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(uint16_t cid){ 466 char buffer[40]; 467 int offset = hfp_ag_generic_indicators_initial_status_join(buffer, sizeof(buffer) - 7); 468 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\nOK\r\n"); 469 return send_str_over_rfcomm(cid, buffer); 470 } 471 472 static int hfp_ag_send_transfer_ag_indicators_status_cmd(uint16_t cid, hfp_ag_indicator_t * indicator){ 473 char buffer[20]; 474 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d\r\n", 475 HFP_TRANSFER_AG_INDICATOR_STATUS, indicator->index, 476 indicator->status); 477 buffer[sizeof(buffer) - 1] = 0; 478 return send_str_over_rfcomm(cid, buffer); 479 } 480 481 static int hfp_ag_send_report_network_operator_name_cmd(uint16_t cid, hfp_network_opearator_t op){ 482 char buffer[41]; 483 if (strlen(op.name) == 0){ 484 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,,\r\n\r\nOK\r\n", HFP_QUERY_OPERATOR_SELECTION, op.mode); 485 } else { 486 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d,", HFP_QUERY_OPERATOR_SELECTION, op.mode, op.format); 487 offset += snprintf(buffer+offset, 16, "%s", op.name); 488 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n\r\nOK\r\n"); 489 } 490 return send_str_over_rfcomm(cid, buffer); 491 } 492 493 static inline int hfp_ag_send_cmd_with_space_and_int(uint16_t cid, const char * cmd, uint8_t value){ 494 char buffer[30]; 495 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", cmd, value); 496 return send_str_over_rfcomm(cid, buffer); 497 } 498 499 500 static inline int hfp_ag_send_cmd_with_int(uint16_t cid, const char * cmd, uint8_t value){ 501 char buffer[30]; 502 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n", cmd, value); 503 return send_str_over_rfcomm(cid, buffer); 504 } 505 506 static int hfp_ag_send_suggest_codec_cmd(uint16_t cid, uint8_t codec){ 507 return hfp_ag_send_cmd_with_int(cid, HFP_CONFIRM_COMMON_CODEC, codec); 508 } 509 510 static int hfp_ag_send_set_speaker_gain_cmd(uint16_t cid, uint8_t gain){ 511 return hfp_ag_send_cmd_with_int(cid, HFP_SET_SPEAKER_GAIN, gain); 512 } 513 514 static int hfp_ag_send_set_microphone_gain_cmd(uint16_t cid, uint8_t gain){ 515 return hfp_ag_send_cmd_with_int(cid, HFP_SET_MICROPHONE_GAIN, gain); 516 } 517 518 static int hfp_ag_send_set_response_and_hold(uint16_t cid, int state){ 519 return hfp_ag_send_cmd_with_space_and_int(cid, HFP_RESPONSE_AND_HOLD, state); 520 } 521 522 static int hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection_t * hfp_connection){ 523 char buffer[30]; 524 uint8_t evra_enabled = hfp_connection->enhanced_voice_recognition_enabled ? 1 : 0; 525 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, evra_enabled, hfp_connection->ag_vra_state); 526 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 527 } 528 529 static int hfp_ag_send_voice_recognition_cmd(hfp_connection_t * hfp_connection, uint8_t activate_voice_recognition){ 530 char buffer[30]; 531 if (hfp_connection->enhanced_voice_recognition_enabled){ 532 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition, hfp_connection->ag_vra_state); 533 } else { 534 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition); 535 } 536 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 537 } 538 539 static int hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection_t * hfp_connection){ 540 char buffer[HFP_VR_TEXT_HEADER_SIZE + HFP_MAX_VR_TEXT_SIZE]; 541 snprintf(buffer, sizeof(buffer), "\r\n%s: 1,%d,%X,%d,%d,\"%s\"\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, 542 hfp_connection->ag_vra_state, 543 hfp_connection->ag_msg.text_id, 544 hfp_connection->ag_msg.text_type, 545 hfp_connection->ag_msg.text_operation, 546 hfp_connection->ag_msg.text); 547 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 548 } 549 550 static uint8_t hfp_ag_suggest_codec(hfp_connection_t *hfp_connection){ 551 if (hfp_connection->sco_for_msbc_failed) return HFP_CODEC_CVSD; 552 553 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 1398 switch (connection->call_state){ 1399 case HFP_CALL_INCOMING_RINGING: 1400 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1401 case HFP_CALL_OUTGOING_RINGING: 1402 case HFP_CALL_OUTGOING_INITIATED: 1403 case HFP_CALL_OUTGOING_DIALING: 1404 break; 1405 default: 1406 continue; 1407 } 1408 1409 connection->call_state = HFP_CALL_IDLE; 1410 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1411 1412 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1413 connection->release_audio_connection = 1; 1414 } 1415 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1416 hfp_ag_run_for_context(connection); 1417 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1418 } 1419 } 1420 1421 static void hfp_ag_trigger_terminate_call(void){ 1422 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1423 1424 // no ringing during call 1425 1426 btstack_linked_list_iterator_t it; 1427 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1428 while (btstack_linked_list_iterator_has_next(&it)){ 1429 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1430 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1431 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1432 1433 hfp_connection->call_state = HFP_CALL_IDLE; 1434 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1435 1436 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1437 hfp_connection->release_audio_connection = 1; 1438 } 1439 1440 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1441 hfp_ag_run_for_context(hfp_connection); 1442 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1443 } 1444 } 1445 1446 static void hfp_ag_set_call_indicator(void){ 1447 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1448 if (!indicator){ 1449 log_error("hfp_ag_set_call_state: call indicator is missing"); 1450 return; 1451 }; 1452 indicator->status = hfp_gsm_call_status(); 1453 } 1454 1455 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1456 btstack_linked_list_iterator_t it; 1457 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1458 while (btstack_linked_list_iterator_has_next(&it)){ 1459 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1460 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1461 if (hfp_connection->call_state == call_state) return hfp_connection; 1462 } 1463 return NULL; 1464 } 1465 1466 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1467 btstack_linked_list_iterator_t it; 1468 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1469 while (btstack_linked_list_iterator_has_next(&it)){ 1470 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1471 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1472 hfp_connection->send_response_and_hold_status = state + 1; 1473 } 1474 } 1475 1476 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1477 int indicator_index; 1478 switch (hfp_connection->call_state){ 1479 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1480 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1481 // we got event: audio hfp_connection established 1482 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1483 break; 1484 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1485 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1486 // we got event: audio hfp_connection established 1487 hfp_connection->call_state = HFP_CALL_ACTIVE; 1488 break; 1489 case HFP_CALL_W2_SEND_CALL_WAITING: 1490 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1491 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1492 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1493 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1494 break; 1495 default: 1496 break; 1497 } 1498 return 0; 1499 } 1500 1501 // functions extracted from hfp_ag_call_sm below 1502 static void hfp_ag_handle_reject_outgoing_call(void){ 1503 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1504 if (!hfp_connection){ 1505 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1506 return; 1507 } 1508 1509 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1510 hfp_connection->call_state = HFP_CALL_IDLE; 1511 hfp_connection->send_error = 1; 1512 hfp_ag_run_for_context(hfp_connection); 1513 } 1514 1515 // hfp_connection is used to identify originating HF 1516 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1517 1518 // allow to intercept call statemachine events 1519 if (hfp_ag_custom_call_sm_handler != NULL){ 1520 bool handle_event = (*hfp_ag_custom_call_sm_handler)(event); 1521 if (!handle_event) return; 1522 } 1523 1524 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1525 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1526 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1527 1528 switch (event){ 1529 case HFP_AG_INCOMING_CALL: 1530 switch (hfp_gsm_call_status()){ 1531 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1532 switch (hfp_gsm_callsetup_status()){ 1533 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1534 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1535 hfp_ag_set_callsetup_indicator(); 1536 hfp_ag_trigger_incoming_call_idle(); 1537 log_info("AG rings"); 1538 break; 1539 default: 1540 break; 1541 } 1542 break; 1543 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1544 switch (hfp_gsm_callsetup_status()){ 1545 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1546 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1547 hfp_ag_set_callsetup_indicator(); 1548 hfp_ag_trigger_incoming_call_during_active_one(); 1549 log_info("AG call waiting"); 1550 break; 1551 default: 1552 break; 1553 } 1554 break; 1555 default: 1556 break; 1557 } 1558 break; 1559 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1560 switch (hfp_gsm_call_status()){ 1561 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1562 switch (hfp_gsm_callsetup_status()){ 1563 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1564 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1565 hfp_ag_set_call_indicator(); 1566 hfp_ag_set_callsetup_indicator(); 1567 hfp_ag_ag_accept_call(); 1568 log_info("AG answers call, accept call by GSM"); 1569 break; 1570 default: 1571 break; 1572 } 1573 break; 1574 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1575 switch (hfp_gsm_callsetup_status()){ 1576 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1577 log_info("AG: current call is placed on hold, incoming call gets active"); 1578 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1579 hfp_ag_set_callsetup_indicator(); 1580 hfp_ag_set_callheld_indicator(); 1581 hfp_ag_transfer_callsetup_state(); 1582 hfp_ag_transfer_callheld_state(); 1583 break; 1584 default: 1585 break; 1586 } 1587 break; 1588 default: 1589 break; 1590 } 1591 break; 1592 1593 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1594 switch (hfp_gsm_call_status()){ 1595 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1596 switch (hfp_gsm_callheld_status()){ 1597 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1598 log_info("AG: joining held call with active call"); 1599 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1600 hfp_ag_set_callheld_indicator(); 1601 hfp_ag_transfer_callheld_state(); 1602 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1603 break; 1604 default: 1605 break; 1606 } 1607 break; 1608 default: 1609 break; 1610 } 1611 break; 1612 1613 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1614 switch (hfp_gsm_call_status()){ 1615 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1616 switch (hfp_gsm_callsetup_status()){ 1617 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1618 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1619 hfp_ag_set_callsetup_indicator(); 1620 hfp_ag_set_call_indicator(); 1621 hfp_ag_hf_accept_call(hfp_connection); 1622 hfp_connection->ok_pending = 1; 1623 log_info("HF answers call, accept call by GSM"); 1624 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1625 break; 1626 default: 1627 break; 1628 } 1629 break; 1630 default: 1631 break; 1632 } 1633 break; 1634 1635 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1636 switch (hfp_gsm_call_status()){ 1637 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1638 switch (hfp_gsm_callsetup_status()){ 1639 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1640 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1641 hfp_ag_response_and_hold_active = true; 1642 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1643 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1644 // as with regular call 1645 hfp_ag_set_call_indicator(); 1646 hfp_ag_set_callsetup_indicator(); 1647 hfp_ag_ag_accept_call(); 1648 log_info("AG response and hold - hold by AG"); 1649 break; 1650 default: 1651 break; 1652 } 1653 break; 1654 default: 1655 break; 1656 } 1657 break; 1658 1659 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1660 switch (hfp_gsm_call_status()){ 1661 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1662 switch (hfp_gsm_callsetup_status()){ 1663 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1664 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1665 hfp_ag_response_and_hold_active = true; 1666 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1667 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1668 // as with regular call 1669 hfp_ag_set_call_indicator(); 1670 hfp_ag_set_callsetup_indicator(); 1671 hfp_ag_hf_accept_call(hfp_connection); 1672 log_info("AG response and hold - hold by HF"); 1673 break; 1674 default: 1675 break; 1676 } 1677 break; 1678 default: 1679 break; 1680 } 1681 break; 1682 1683 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1684 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1685 if (!hfp_ag_response_and_hold_active) break; 1686 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1687 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1688 hfp_ag_response_and_hold_active = false; 1689 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1690 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1691 log_info("Held Call accepted and active"); 1692 break; 1693 1694 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1695 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1696 if (!hfp_ag_response_and_hold_active) break; 1697 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1698 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1699 hfp_ag_response_and_hold_active = false; 1700 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1701 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1702 // from terminate by ag 1703 hfp_ag_set_call_indicator(); 1704 hfp_ag_trigger_terminate_call(); 1705 break; 1706 1707 case HFP_AG_TERMINATE_CALL_BY_HF: 1708 switch (hfp_gsm_call_status()){ 1709 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1710 switch (hfp_gsm_callsetup_status()){ 1711 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1712 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1713 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1714 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1715 hfp_ag_set_callsetup_indicator(); 1716 hfp_ag_transfer_callsetup_state(); 1717 hfp_ag_trigger_reject_call(); 1718 log_info("HF Rejected Incoming call, AG terminate call"); 1719 break; 1720 default: 1721 break; 1722 } 1723 break; 1724 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1725 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1726 hfp_ag_set_callsetup_indicator(); 1727 hfp_ag_set_call_indicator(); 1728 hfp_ag_trigger_terminate_call(); 1729 log_info("AG terminate call"); 1730 break; 1731 default: 1732 break; 1733 } 1734 break; 1735 1736 case HFP_AG_TERMINATE_CALL_BY_AG: 1737 switch (hfp_gsm_call_status()){ 1738 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1739 switch (hfp_gsm_callsetup_status()){ 1740 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1741 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1742 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1743 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1744 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1745 hfp_ag_set_callsetup_indicator(); 1746 hfp_ag_trigger_reject_call(); 1747 log_info("AG Rejected Incoming call, AG terminate call"); 1748 break; 1749 default: 1750 break; 1751 } 1752 break; 1753 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1754 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1755 hfp_ag_set_callsetup_indicator(); 1756 hfp_ag_set_call_indicator(); 1757 hfp_ag_trigger_terminate_call(); 1758 log_info("AG terminate call"); 1759 break; 1760 default: 1761 break; 1762 } 1763 break; 1764 case HFP_AG_CALL_DROPPED: 1765 switch (hfp_gsm_call_status()){ 1766 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1767 switch (hfp_gsm_callsetup_status()){ 1768 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1769 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1770 hfp_ag_stop_ringing(); 1771 break; 1772 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1773 log_info("Outgoing call interrupted\n"); 1774 break; 1775 default: 1776 break; 1777 } 1778 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1779 hfp_ag_set_callsetup_indicator(); 1780 hfp_ag_transfer_callsetup_state(); 1781 hfp_ag_trigger_terminate_call(); 1782 break; 1783 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1784 if (hfp_ag_response_and_hold_active) { 1785 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1786 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1787 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1788 } 1789 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1790 hfp_ag_set_callsetup_indicator(); 1791 hfp_ag_set_call_indicator(); 1792 hfp_ag_trigger_terminate_call(); 1793 log_info("AG notify call dropped"); 1794 break; 1795 default: 1796 break; 1797 } 1798 break; 1799 1800 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1801 // directly reject call if number of free slots is exceeded 1802 if (!hfp_gsm_call_possible()){ 1803 hfp_connection->send_error = 1; 1804 hfp_ag_run_for_context(hfp_connection); 1805 break; 1806 } 1807 1808 // note: number not used currently 1809 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1810 1811 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1812 1813 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1814 break; 1815 1816 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1817 // directly reject call if number of free slots is exceeded 1818 if (!hfp_gsm_call_possible()) { 1819 // TODO: no error for user 1820 break; 1821 } 1822 switch (hfp_gsm_call_status()) { 1823 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1824 switch (hfp_gsm_callsetup_status()) { 1825 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1826 // note: number not used currently 1827 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1828 // init call state for all connections 1829 hfp_ag_trigger_outgoing_call(); 1830 // get first one and accept call 1831 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1832 if (hfp_connection) { 1833 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1834 } 1835 break; 1836 default: 1837 // TODO: no error for user 1838 break; 1839 } 1840 break; 1841 default: 1842 // TODO: no error for user 1843 break; 1844 } 1845 break; 1846 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1847 // directly reject call if number of free slots is exceeded 1848 if (!hfp_gsm_call_possible()){ 1849 hfp_connection->send_error = 1; 1850 hfp_ag_run_for_context(hfp_connection); 1851 break; 1852 } 1853 1854 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1855 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1856 1857 log_info("Redial last number"); 1858 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1859 1860 if (strlen(last_dialed_number) > 0){ 1861 log_info("Last number exists: accept call"); 1862 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1863 } else { 1864 log_info("log_infoLast number missing: reject call"); 1865 hfp_ag_handle_reject_outgoing_call(); 1866 } 1867 break; 1868 } 1869 case HFP_AG_OUTGOING_CALL_REJECTED: 1870 hfp_ag_handle_reject_outgoing_call(); 1871 break; 1872 1873 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1874 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1875 if (!hfp_connection){ 1876 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1877 break; 1878 } 1879 1880 hfp_connection->ok_pending = 1; 1881 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1882 break; 1883 } 1884 case HFP_AG_OUTGOING_CALL_RINGING: 1885 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1886 if (!hfp_connection){ 1887 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1888 break; 1889 } 1890 1891 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1892 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1893 hfp_ag_set_callsetup_indicator(); 1894 hfp_ag_transfer_callsetup_state(); 1895 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1896 break; 1897 1898 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1899 // get outgoing call 1900 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1901 if (!hfp_connection){ 1902 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1903 } 1904 if (!hfp_connection){ 1905 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1906 break; 1907 } 1908 1909 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1910 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1911 hfp_connection->call_state = HFP_CALL_ACTIVE; 1912 hfp_ag_set_callsetup_indicator(); 1913 hfp_ag_set_call_indicator(); 1914 hfp_ag_transfer_call_state(); 1915 hfp_ag_transfer_callsetup_state(); 1916 if (callheld_status_call_on_hold_and_no_active_calls){ 1917 hfp_ag_set_callheld_indicator(); 1918 hfp_ag_transfer_callheld_state(); 1919 } 1920 hfp_ag_hf_stop_ringing(hfp_connection); 1921 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1922 break; 1923 } 1924 1925 case HFP_AG_CALL_HOLD_USER_BUSY: 1926 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1927 hfp_ag_set_callsetup_indicator(); 1928 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1929 hfp_connection->call_state = HFP_CALL_ACTIVE; 1930 log_info("AG: Call Waiting, User Busy"); 1931 break; 1932 1933 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1934 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1935 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1936 1937 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1938 if (call_held || call_setup_in_progress){ 1939 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1940 0, NULL); 1941 1942 } 1943 1944 if (call_setup_in_progress){ 1945 log_info("AG: Call Dropped, Accept new call"); 1946 hfp_ag_set_callsetup_indicator(); 1947 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1948 } else { 1949 log_info("AG: Call Dropped, Resume held call"); 1950 } 1951 if (call_held){ 1952 hfp_ag_set_callheld_indicator(); 1953 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1954 } 1955 1956 hfp_connection->call_state = HFP_CALL_ACTIVE; 1957 break; 1958 } 1959 1960 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1961 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1962 // only update if callsetup changed 1963 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1964 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1965 NULL); 1966 1967 if (call_setup_in_progress){ 1968 log_info("AG: Call on Hold, Accept new call"); 1969 hfp_ag_set_callsetup_indicator(); 1970 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1971 } else { 1972 log_info("AG: Swap calls"); 1973 } 1974 1975 hfp_ag_set_callheld_indicator(); 1976 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1977 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1978 hfp_connection->call_state = HFP_CALL_ACTIVE; 1979 break; 1980 } 1981 1982 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1983 // Adds a held call to the conversation. 1984 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1985 log_info("AG: Join 3-way-call"); 1986 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1987 hfp_ag_set_callheld_indicator(); 1988 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1989 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1990 } 1991 hfp_connection->call_state = HFP_CALL_ACTIVE; 1992 break; 1993 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1994 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1995 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1996 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1997 hfp_ag_set_call_indicator(); 1998 hfp_ag_set_callheld_indicator(); 1999 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 2000 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2001 hfp_connection->call_state = HFP_CALL_IDLE; 2002 break; 2003 2004 default: 2005 break; 2006 } 2007 2008 2009 } 2010 2011 2012 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2013 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2014 if (!active_call) return; 2015 2016 int idx = active_call->index; 2017 hfp_enhanced_call_dir_t dir = active_call->direction; 2018 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2019 hfp_enhanced_call_mode_t mode = active_call->mode; 2020 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2021 uint8_t type = active_call->clip_type; 2022 char * number = active_call->clip_number; 2023 2024 char buffer[100]; 2025 // TODO: check length of a buffer, to fit the MTU 2026 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2027 if (number){ 2028 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2029 } 2030 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2031 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, 2032 mode, mpty, type, number); 2033 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2034 } 2035 2036 // sends pending command, returns if command was sent 2037 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2038 if (hfp_connection->send_status_of_current_calls){ 2039 hfp_connection->ok_pending = 0; 2040 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2041 hfp_connection->next_call_index++; 2042 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2043 return 1; 2044 } else { 2045 // 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 2046 hfp_connection->next_call_index = 0; 2047 hfp_connection->ok_pending = 1; 2048 hfp_connection->send_status_of_current_calls = 0; 2049 } 2050 } 2051 2052 if (hfp_connection->ag_notify_incoming_call_waiting){ 2053 hfp_connection->ag_notify_incoming_call_waiting = 0; 2054 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2055 return 1; 2056 } 2057 2058 if (hfp_connection->send_error){ 2059 hfp_connection->send_error = 0; 2060 hfp_connection->command = HFP_CMD_NONE; 2061 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2062 return 1; 2063 } 2064 2065 // note: before update AG indicators and ok_pending 2066 if (hfp_connection->send_response_and_hold_status){ 2067 int status = hfp_connection->send_response_and_hold_status - 1; 2068 hfp_connection->send_response_and_hold_status = 0; 2069 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2070 return 1; 2071 } 2072 2073 if (hfp_connection->ok_pending){ 2074 hfp_connection->ok_pending = 0; 2075 hfp_connection->command = HFP_CMD_NONE; 2076 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2077 return 1; 2078 } 2079 2080 // update AG indicators only if enabled by AT+CMER=3,0,0,1 2081 if ((hfp_connection->enable_status_update_for_ag_indicators == 1) && (hfp_connection->ag_indicators_status_update_bitmap != 0)){ 2082 uint16_t i; 2083 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2084 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2085 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2086 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2087 return 1; 2088 } 2089 } 2090 } 2091 2092 if (hfp_connection->ag_send_no_carrier){ 2093 hfp_connection->ag_send_no_carrier = false; 2094 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2095 return 1; 2096 } 2097 2098 if (hfp_connection->send_phone_number_for_voice_tag){ 2099 hfp_connection->send_phone_number_for_voice_tag = 0; 2100 hfp_connection->command = HFP_CMD_NONE; 2101 hfp_connection->ok_pending = 1; 2102 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2103 return 1; 2104 } 2105 2106 if (hfp_connection->send_subscriber_number){ 2107 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2108 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2109 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2110 } else { 2111 hfp_connection->send_subscriber_number = 0; 2112 hfp_connection->next_subscriber_number_to_send = 0; 2113 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2114 } 2115 hfp_connection->command = HFP_CMD_NONE; 2116 return 1; 2117 } 2118 2119 if (hfp_connection->send_microphone_gain){ 2120 hfp_connection->send_microphone_gain = 0; 2121 hfp_connection->command = HFP_CMD_NONE; 2122 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2123 return 1; 2124 } 2125 2126 if (hfp_connection->send_speaker_gain){ 2127 hfp_connection->send_speaker_gain = 0; 2128 hfp_connection->command = HFP_CMD_NONE; 2129 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2130 return 1; 2131 } 2132 2133 if (hfp_connection->send_ag_status_indicators){ 2134 hfp_connection->send_ag_status_indicators = 0; 2135 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2136 return 1; 2137 } 2138 2139 return 0; 2140 } 2141 2142 // sends pending command, returns if command was sent 2143 static int hfp_ag_run_ring_and_clip(hfp_connection_t *hfp_connection){ 2144 // delay RING/CLIP until audio connection has been established for incoming calls 2145 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2146 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2147 if (hfp_connection->ag_ring){ 2148 hfp_connection->ag_ring = 0; 2149 hfp_connection->command = HFP_CMD_NONE; 2150 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2151 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2152 return 1; 2153 } 2154 2155 if (hfp_connection->ag_send_clip){ 2156 hfp_connection->ag_send_clip = 0; 2157 hfp_connection->command = HFP_CMD_NONE; 2158 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2159 return 1; 2160 } 2161 } 2162 return 0; 2163 } 2164 2165 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2166 2167 btstack_assert(hfp_connection != NULL); 2168 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2169 2170 // during SDP query, RFCOMM CID is not set 2171 if (hfp_connection->rfcomm_cid == 0) return; 2172 2173 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2174 hfp_connection->emit_vra_enabled_after_audio_established = false; 2175 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2176 } 2177 2178 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2179 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2180 hfp_connection->release_audio_connection = 0; 2181 gap_disconnect(hfp_connection->sco_handle); 2182 return; 2183 } 2184 2185 // configure NBS/WBS if needed using vendor-specific HCI commands 2186 if (hci_can_send_command_packet_now()) { 2187 #ifdef ENABLE_CC256X_ASSISTED_HFP 2188 // WBS Disassociate 2189 if (hfp_connection->cc256x_send_wbs_disassociate){ 2190 hfp_connection->cc256x_send_wbs_disassociate = false; 2191 hci_send_cmd(&hci_ti_wbs_disassociate); 2192 return; 2193 } 2194 // Write Codec Config 2195 if (hfp_connection->cc256x_send_write_codec_config){ 2196 hfp_connection->cc256x_send_write_codec_config = false; 2197 hfp_cc256x_write_codec_config(hfp_connection); 2198 return; 2199 } 2200 // WBS Associate 2201 if (hfp_connection->cc256x_send_wbs_associate){ 2202 hfp_connection->cc256x_send_wbs_associate = false; 2203 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2204 return; 2205 } 2206 #endif 2207 #ifdef ENABLE_BCM_PCM_WBS 2208 // Enable WBS 2209 if (hfp_connection->bcm_send_enable_wbs){ 2210 hfp_connection->bcm_send_enable_wbs = false; 2211 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2212 return; 2213 } 2214 // Write I2S/PCM params 2215 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2216 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2217 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2218 return; 2219 } 2220 // Disable WBS 2221 if (hfp_connection->bcm_send_disable_wbs){ 2222 hfp_connection->bcm_send_disable_wbs = false; 2223 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2224 return; 2225 } 2226 #endif 2227 #ifdef ENABLE_RTK_PCM_WBS 2228 // Configure CVSD vs. mSBC 2229 if (hfp_connection->rtk_send_sco_config){ 2230 hfp_connection->rtk_send_sco_config = false; 2231 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2232 log_info("RTK SCO: 16k + mSBC"); 2233 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2234 } else { 2235 log_info("RTK SCO: 16k + CVSD"); 2236 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2237 } 2238 return; 2239 } 2240 #endif 2241 } 2242 2243 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2244 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2245 hfp_finalize_connection_context(hfp_connection); 2246 return; 2247 } 2248 #endif 2249 2250 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2251 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2252 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2253 return; 2254 } 2255 2256 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2257 2258 if (!cmd_sent){ 2259 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2260 } 2261 2262 if (!cmd_sent){ 2263 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2264 } 2265 2266 if (!cmd_sent){ 2267 cmd_sent = call_setup_state_machine(hfp_connection); 2268 } 2269 2270 if (!cmd_sent){ 2271 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2272 } 2273 2274 if (!cmd_sent){ 2275 cmd_sent = hfp_ag_run_ring_and_clip(hfp_connection); 2276 } 2277 2278 if (!cmd_sent){ 2279 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2280 } 2281 2282 // disconnect 2283 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2284 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2285 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2286 } 2287 2288 if (cmd_sent){ 2289 hfp_connection->command = HFP_CMD_NONE; 2290 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2291 } 2292 } 2293 2294 static int hfp_parser_is_end_of_line(uint8_t byte){ 2295 return (byte == '\n') || (byte == '\r'); 2296 } 2297 2298 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2299 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2300 if (size < 1) return; 2301 uint8_t status = ERROR_CODE_SUCCESS; 2302 2303 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2304 #ifdef ENABLE_HFP_AT_MESSAGES 2305 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2306 #endif 2307 2308 // process messages byte-wise 2309 int pos; 2310 for (pos = 0; pos < size ; pos++){ 2311 hfp_parse(hfp_connection, packet[pos], 0); 2312 2313 // parse until end of line 2314 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2315 2316 hfp_generic_status_indicator_t * indicator; 2317 switch(hfp_connection->command){ 2318 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2319 hfp_connection->command = HFP_CMD_NONE; 2320 hfp_connection->ag_vra_requested_by_hf = true; 2321 break; 2322 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2323 hfp_connection->command = HFP_CMD_NONE; 2324 if (hfp_ag_response_and_hold_active){ 2325 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2326 } 2327 hfp_connection->ok_pending = 1; 2328 break; 2329 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2330 hfp_connection->command = HFP_CMD_NONE; 2331 switch(hfp_connection->ag_response_and_hold_action){ 2332 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2333 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2334 break; 2335 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2336 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2337 break; 2338 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2339 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2340 break; 2341 default: 2342 break; 2343 } 2344 hfp_connection->ok_pending = 1; 2345 break; 2346 case HFP_CMD_HF_INDICATOR_STATUS: 2347 hfp_connection->command = HFP_CMD_NONE; 2348 2349 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2350 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2351 switch (indicator->uuid){ 2352 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2353 if (hfp_connection->parser_indicator_value > 1) { 2354 hfp_connection->send_error = 1; 2355 break; 2356 } 2357 hfp_connection->ok_pending = 1; 2358 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2359 break; 2360 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2361 if (hfp_connection->parser_indicator_value > 100){ 2362 hfp_connection->send_error = 1; 2363 break; 2364 } 2365 hfp_connection->ok_pending = 1; 2366 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2367 break; 2368 default: 2369 hfp_connection->send_error = 1; 2370 break; 2371 } 2372 } else { 2373 hfp_connection->send_error = 1; 2374 } 2375 break; 2376 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2377 // expected by SLC state machine 2378 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2379 hfp_connection->send_ag_indicators_segment = 0; 2380 hfp_connection->send_ag_status_indicators = 1; 2381 break; 2382 case HFP_CMD_LIST_CURRENT_CALLS: 2383 hfp_connection->command = HFP_CMD_NONE; 2384 hfp_connection->next_call_index = 0; 2385 hfp_connection->send_status_of_current_calls = 1; 2386 break; 2387 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2388 hfp_connection->command = HFP_CMD_NONE; 2389 if (hfp_ag_subscriber_numbers_count == 0){ 2390 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2391 break; 2392 } 2393 hfp_connection->next_subscriber_number_to_send = 0; 2394 hfp_connection->send_subscriber_number = 1; 2395 break; 2396 case HFP_CMD_TRANSMIT_DTMF_CODES: 2397 { 2398 hfp_connection->command = HFP_CMD_NONE; 2399 char buffer[2]; 2400 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2401 buffer[1] = 0; 2402 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2403 break; 2404 } 2405 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2406 hfp_connection->command = HFP_CMD_NONE; 2407 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2408 break; 2409 case HFP_CMD_TURN_OFF_EC_AND_NR: 2410 hfp_connection->command = HFP_CMD_NONE; 2411 2412 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2413 hfp_connection->ok_pending = 1; 2414 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2415 status = ERROR_CODE_SUCCESS; 2416 } else { 2417 hfp_connection->send_error = 1; 2418 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2419 } 2420 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2421 break; 2422 case HFP_CMD_CALL_ANSWERED: 2423 hfp_connection->command = HFP_CMD_NONE; 2424 log_info("HFP: ATA"); 2425 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2426 break; 2427 case HFP_CMD_HANG_UP_CALL: 2428 hfp_connection->command = HFP_CMD_NONE; 2429 hfp_connection->ok_pending = 1; 2430 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2431 break; 2432 case HFP_CMD_CALL_HOLD: { 2433 hfp_connection->command = HFP_CMD_NONE; 2434 hfp_connection->ok_pending = 1; 2435 2436 switch (hfp_connection->ag_call_hold_action){ 2437 case 0: 2438 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2439 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2440 break; 2441 case 1: 2442 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2443 // Where both a held and a waiting call exist, the above procedures shall apply to the 2444 // waiting call (i.e., not to the held call) in conflicting situation. 2445 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2446 break; 2447 case 2: 2448 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2449 // Where both a held and a waiting call exist, the above procedures shall apply to the 2450 // waiting call (i.e., not to the held call) in conflicting situation. 2451 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2452 break; 2453 case 3: 2454 // Adds a held call to the conversation. 2455 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2456 break; 2457 case 4: 2458 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2459 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2460 break; 2461 default: 2462 break; 2463 } 2464 hfp_connection->call_index = 0; 2465 break; 2466 } 2467 case HFP_CMD_CALL_PHONE_NUMBER: 2468 hfp_connection->command = HFP_CMD_NONE; 2469 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2470 break; 2471 case HFP_CMD_REDIAL_LAST_NUMBER: 2472 hfp_connection->command = HFP_CMD_NONE; 2473 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2474 break; 2475 case HFP_CMD_ENABLE_CLIP: 2476 hfp_connection->command = HFP_CMD_NONE; 2477 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2478 hfp_connection->ok_pending = 1; 2479 break; 2480 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2481 hfp_connection->command = HFP_CMD_NONE; 2482 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2483 hfp_connection->ok_pending = 1; 2484 break; 2485 case HFP_CMD_SET_SPEAKER_GAIN: 2486 hfp_connection->command = HFP_CMD_NONE; 2487 hfp_connection->ok_pending = 1; 2488 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2489 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2490 break; 2491 case HFP_CMD_SET_MICROPHONE_GAIN: 2492 hfp_connection->command = HFP_CMD_NONE; 2493 hfp_connection->ok_pending = 1; 2494 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2495 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2496 break; 2497 case HFP_CMD_UNKNOWN: 2498 hfp_connection->command = HFP_CMD_NONE; 2499 hfp_connection->send_error = 1; 2500 break; 2501 default: 2502 break; 2503 } 2504 } 2505 } 2506 2507 static void hfp_ag_run(void){ 2508 btstack_linked_list_iterator_t it; 2509 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2510 while (btstack_linked_list_iterator_has_next(&it)){ 2511 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2512 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2513 hfp_ag_run_for_context(hfp_connection); 2514 } 2515 } 2516 2517 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2518 hfp_connection_t * hfp_connection = NULL; 2519 switch (packet_type){ 2520 case RFCOMM_DATA_PACKET: 2521 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2522 btstack_assert(hfp_connection != NULL); 2523 2524 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2525 hfp_ag_run_for_context(hfp_connection); 2526 return; 2527 case HCI_EVENT_PACKET: 2528 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2529 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2530 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2531 btstack_assert(hfp_connection != NULL); 2532 2533 hfp_ag_run_for_context(hfp_connection); 2534 return; 2535 } 2536 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2537 break; 2538 default: 2539 break; 2540 } 2541 2542 hfp_ag_run(); 2543 } 2544 2545 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2546 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2547 hfp_ag_run(); 2548 } 2549 2550 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2551 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2552 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2553 return; 2554 } 2555 int i; 2556 hfp_ag_codecs_nr = codecs_nr; 2557 for (i=0; i < codecs_nr; i++){ 2558 hfp_ag_codecs[i] = codecs[i]; 2559 } 2560 } 2561 2562 void hfp_ag_init_supported_features(uint32_t supported_features){ 2563 hfp_ag_supported_features = supported_features; 2564 } 2565 2566 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2567 hfp_ag_indicators_nr = ag_indicators_nr; 2568 (void)memcpy(hfp_ag_indicators, ag_indicators, 2569 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2570 } 2571 2572 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2573 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2574 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2575 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2576 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2577 } 2578 2579 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2580 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2581 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2582 call_hold_services_nr * sizeof(char *)); 2583 } 2584 2585 2586 void hfp_ag_init(uint8_t rfcomm_channel_nr){ 2587 2588 hfp_init(); 2589 hfp_ag_call_hold_services_nr = 0; 2590 hfp_ag_response_and_hold_active = false; 2591 hfp_ag_indicators_nr = 0; 2592 hfp_ag_codecs_nr = 0; 2593 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2594 hfp_ag_subscriber_numbers = NULL; 2595 hfp_ag_subscriber_numbers_count = 0; 2596 2597 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2598 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2599 2600 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2601 2602 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2603 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2604 2605 hfp_gsm_init(); 2606 } 2607 2608 void hfp_ag_deinit(void){ 2609 hfp_deinit(); 2610 hfp_gsm_deinit(); 2611 2612 hfp_ag_callback = NULL; 2613 hfp_ag_supported_features = 0; 2614 hfp_ag_codecs_nr = 0; 2615 hfp_ag_indicators_nr = 0; 2616 hfp_ag_call_hold_services_nr = 0; 2617 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2618 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2619 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2620 hfp_ag_subscriber_numbers = NULL; 2621 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2622 hfp_ag_custom_call_sm_handler = NULL; 2623 } 2624 2625 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2626 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2627 } 2628 2629 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2630 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2631 if (!hfp_connection){ 2632 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2633 } 2634 2635 hfp_trigger_release_service_level_connection(hfp_connection); 2636 hfp_ag_run_for_context(hfp_connection); 2637 return ERROR_CODE_SUCCESS; 2638 } 2639 2640 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2641 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2642 if (!hfp_connection){ 2643 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2644 } 2645 2646 hfp_connection->extended_audio_gateway_error = 0; 2647 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2648 return ERROR_CODE_COMMAND_DISALLOWED; 2649 } 2650 2651 hfp_connection->extended_audio_gateway_error = error; 2652 hfp_ag_run_for_context(hfp_connection); 2653 return ERROR_CODE_SUCCESS; 2654 } 2655 2656 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2657 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2658 return ERROR_CODE_COMMAND_DISALLOWED; 2659 } 2660 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2661 return ERROR_CODE_COMMAND_DISALLOWED; 2662 } 2663 2664 hfp_connection->establish_audio_connection = 1; 2665 if (!has_codec_negotiation_feature(hfp_connection)){ 2666 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2667 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2668 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2669 // now, pick link settings 2670 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2671 #ifdef ENABLE_CC256X_ASSISTED_HFP 2672 hfp_cc256x_prepare_for_sco(hfp_connection); 2673 #endif 2674 return ERROR_CODE_SUCCESS; 2675 } 2676 2677 uint8_t i; 2678 bool codec_was_in_use = false; 2679 bool better_codec_can_be_used = false; 2680 2681 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2682 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2683 codec_was_in_use = true; 2684 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2685 better_codec_can_be_used = true; 2686 } 2687 } 2688 2689 if (!codec_was_in_use || better_codec_can_be_used){ 2690 hfp_connection->ag_send_common_codec = true; 2691 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2692 } 2693 return ERROR_CODE_SUCCESS; 2694 } 2695 2696 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2697 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2698 if (!hfp_connection){ 2699 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2700 } 2701 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2702 if (status != ERROR_CODE_SUCCESS){ 2703 return status; 2704 } 2705 hfp_ag_run_for_context(hfp_connection); 2706 return ERROR_CODE_SUCCESS; 2707 } 2708 2709 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2710 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2711 if (!hfp_connection){ 2712 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2713 } 2714 2715 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2716 return ERROR_CODE_COMMAND_DISALLOWED; 2717 } 2718 2719 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2720 if (status == ERROR_CODE_SUCCESS){ 2721 hfp_ag_run_for_context(hfp_connection); 2722 } 2723 return status; 2724 } 2725 2726 /** 2727 * @brief Enable in-band ring tone 2728 */ 2729 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2730 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2731 return; 2732 } 2733 2734 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2735 2736 btstack_linked_list_iterator_t it; 2737 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2738 while (btstack_linked_list_iterator_has_next(&it)){ 2739 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2740 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2741 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2742 hfp_ag_run_for_context(hfp_connection); 2743 } 2744 } 2745 2746 /** 2747 * @brief Called from GSM 2748 */ 2749 void hfp_ag_incoming_call(void){ 2750 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2751 } 2752 2753 void hfp_ag_outgoing_call_initiated(void) { 2754 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2755 } 2756 2757 /** 2758 * @brief number is stored. 2759 */ 2760 void hfp_ag_set_clip(uint8_t type, const char * number){ 2761 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2762 } 2763 2764 void hfp_ag_call_dropped(void){ 2765 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2766 } 2767 2768 // call from AG UI 2769 void hfp_ag_answer_incoming_call(void){ 2770 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2771 } 2772 2773 void hfp_ag_join_held_call(void){ 2774 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2775 } 2776 2777 void hfp_ag_terminate_call(void){ 2778 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2779 } 2780 2781 void hfp_ag_outgoing_call_ringing(void){ 2782 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2783 } 2784 2785 void hfp_ag_outgoing_call_established(void){ 2786 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2787 } 2788 2789 void hfp_ag_outgoing_call_rejected(void){ 2790 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2791 } 2792 2793 void hfp_ag_outgoing_call_accepted(void){ 2794 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2795 } 2796 2797 void hfp_ag_hold_incoming_call(void){ 2798 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2799 } 2800 2801 void hfp_ag_accept_held_incoming_call(void) { 2802 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2803 } 2804 2805 void hfp_ag_reject_held_incoming_call(void){ 2806 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2807 } 2808 2809 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2810 int indicator_index = get_ag_indicator_index_for_name(name); 2811 if (indicator_index < 0) return; 2812 hfp_ag_indicators[indicator_index].status = value; 2813 2814 btstack_linked_list_iterator_t it; 2815 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2816 while (btstack_linked_list_iterator_has_next(&it)){ 2817 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2818 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2819 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2820 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2821 continue; 2822 } 2823 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2824 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2825 hfp_ag_run_for_context(hfp_connection); 2826 } 2827 } 2828 2829 uint8_t hfp_ag_set_registration_status(int registration_status){ 2830 if ((registration_status < 0) || (registration_status > 1)){ 2831 return ERROR_CODE_COMMAND_DISALLOWED; 2832 } 2833 2834 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2835 2836 // if network goes away wihle a call is active: 2837 // - the call gets dropped 2838 // - we send NO CARRIER 2839 // NOTE: the CALL=0 has to be sent before NO CARRIER 2840 2841 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2842 2843 btstack_linked_list_iterator_t it; 2844 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2845 while (btstack_linked_list_iterator_has_next(&it)){ 2846 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2847 hfp_connection->ag_send_no_carrier = true; 2848 } 2849 } 2850 hfp_ag_set_ag_indicator("service", registration_status); 2851 return ERROR_CODE_SUCCESS; 2852 } 2853 2854 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2855 if ((signal_strength < 0) || (signal_strength > 5)){ 2856 return ERROR_CODE_COMMAND_DISALLOWED; 2857 } 2858 2859 hfp_ag_set_ag_indicator("signal", signal_strength); 2860 return ERROR_CODE_SUCCESS; 2861 } 2862 2863 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2864 if ((roaming_status < 0) || (roaming_status > 1)){ 2865 return ERROR_CODE_COMMAND_DISALLOWED; 2866 } 2867 2868 hfp_ag_set_ag_indicator("roam", roaming_status); 2869 return ERROR_CODE_SUCCESS; 2870 } 2871 2872 uint8_t hfp_ag_set_battery_level(int battery_level){ 2873 if ((battery_level < 0) || (battery_level > 5)){ 2874 return ERROR_CODE_COMMAND_DISALLOWED; 2875 } 2876 hfp_ag_set_ag_indicator("battchg", battery_level); 2877 return ERROR_CODE_SUCCESS; 2878 } 2879 2880 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2881 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2882 if (!hfp_connection){ 2883 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2884 } 2885 2886 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2887 return ERROR_CODE_COMMAND_DISALLOWED; 2888 } 2889 2890 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2891 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2892 if (!enhanced_vra_supported && !legacy_vra_supported){ 2893 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2894 } 2895 2896 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2897 return ERROR_CODE_COMMAND_DISALLOWED; 2898 } 2899 2900 hfp_connection->ag_activate_voice_recognition_value = 1; 2901 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2902 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2903 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2904 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2905 hfp_connection->ag_vra_send_command = true; 2906 hfp_ag_run_for_context(hfp_connection); 2907 return ERROR_CODE_SUCCESS; 2908 } 2909 2910 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2911 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2912 if (!hfp_connection){ 2913 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2914 } 2915 2916 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2917 return ERROR_CODE_COMMAND_DISALLOWED; 2918 } 2919 2920 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2921 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2922 2923 if (!enhanced_vra_supported && !legacy_vra_supported){ 2924 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2925 } 2926 2927 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2928 return ERROR_CODE_COMMAND_DISALLOWED; 2929 } 2930 2931 hfp_connection->ag_activate_voice_recognition_value = 0; 2932 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2933 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2934 hfp_connection->ag_vra_send_command = true; 2935 hfp_ag_run_for_context(hfp_connection); 2936 return ERROR_CODE_SUCCESS; 2937 } 2938 2939 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2940 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2941 if (!hfp_connection){ 2942 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2943 } 2944 2945 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2946 return ERROR_CODE_COMMAND_DISALLOWED; 2947 } 2948 2949 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2950 return ERROR_CODE_COMMAND_DISALLOWED; 2951 } 2952 2953 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2954 return ERROR_CODE_COMMAND_DISALLOWED; 2955 } 2956 2957 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2958 if (!enhanced_vra_supported ){ 2959 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2960 } 2961 2962 2963 hfp_connection->ag_vra_state = state; 2964 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2965 hfp_connection->ag_vra_send_command = true; 2966 hfp_ag_run_for_context(hfp_connection); 2967 return ERROR_CODE_SUCCESS; 2968 } 2969 2970 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2971 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2972 } 2973 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2974 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2975 } 2976 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2977 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2978 } 2979 2980 2981 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){ 2982 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2983 if (!hfp_connection){ 2984 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2985 } 2986 2987 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2988 return ERROR_CODE_COMMAND_DISALLOWED; 2989 } 2990 2991 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2992 return ERROR_CODE_COMMAND_DISALLOWED; 2993 } 2994 2995 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2996 return ERROR_CODE_COMMAND_DISALLOWED; 2997 } 2998 2999 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 3000 if (!enhanced_vra_supported ){ 3001 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3002 } 3003 3004 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 3005 if (!enhanced_vra_msg_supported ){ 3006 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3007 } 3008 3009 uint16_t message_len = (uint16_t) strlen(msg.text); 3010 3011 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 3012 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3013 } 3014 3015 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 3016 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3017 } 3018 3019 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 3020 hfp_connection->ag_msg = msg; 3021 hfp_connection->ag_vra_state = state; 3022 hfp_connection->ag_vra_send_command = true; 3023 hfp_ag_run_for_context(hfp_connection); 3024 3025 return ERROR_CODE_SUCCESS; 3026 } 3027 3028 3029 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3030 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3031 if (!hfp_connection){ 3032 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3033 } 3034 3035 if ((gain < 0) || (gain > 15)){ 3036 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3037 return ERROR_CODE_COMMAND_DISALLOWED; 3038 } 3039 3040 if (hfp_connection->microphone_gain != gain){ 3041 hfp_connection->microphone_gain = gain; 3042 hfp_connection->send_microphone_gain = 1; 3043 } 3044 hfp_ag_run_for_context(hfp_connection); 3045 return ERROR_CODE_SUCCESS; 3046 } 3047 3048 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3049 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3050 if (!hfp_connection){ 3051 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3052 } 3053 3054 if ((gain < 0) || (gain > 15)){ 3055 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3056 return ERROR_CODE_COMMAND_DISALLOWED; 3057 } 3058 3059 if (hfp_connection->speaker_gain != gain){ 3060 hfp_connection->speaker_gain = gain; 3061 hfp_connection->send_speaker_gain = 1; 3062 } 3063 hfp_ag_run_for_context(hfp_connection); 3064 return ERROR_CODE_SUCCESS; 3065 } 3066 3067 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3068 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3069 if (!hfp_connection){ 3070 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3071 } 3072 3073 hfp_ag_set_clip(0, number); 3074 hfp_connection->send_phone_number_for_voice_tag = 1; 3075 return ERROR_CODE_SUCCESS; 3076 } 3077 3078 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3079 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3080 if (!hfp_connection){ 3081 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3082 } 3083 3084 hfp_connection->send_error = 1; 3085 return ERROR_CODE_SUCCESS; 3086 } 3087 3088 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3089 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3090 if (!hfp_connection){ 3091 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3092 } 3093 3094 hfp_connection->ok_pending = 1; 3095 return ERROR_CODE_SUCCESS; 3096 } 3097 3098 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3099 hfp_ag_subscriber_numbers = numbers; 3100 hfp_ag_subscriber_numbers_count = numbers_count; 3101 } 3102 3103 void hfp_ag_clear_last_dialed_number(void){ 3104 hfp_gsm_clear_last_dialed_number(); 3105 } 3106 3107 void hfp_ag_set_last_dialed_number(const char * number){ 3108 hfp_gsm_set_last_dialed_number(number); 3109 } 3110 3111 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3112 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3113 if (!hfp_connection){ 3114 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3115 } 3116 3117 if (!hfp_connection->call_waiting_notification_enabled){ 3118 return ERROR_CODE_COMMAND_DISALLOWED; 3119 } 3120 3121 hfp_connection->ag_notify_incoming_call_waiting = 1; 3122 hfp_ag_run_for_context(hfp_connection); 3123 return ERROR_CODE_SUCCESS; 3124 } 3125 3126 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){ 3127 if (!name){ 3128 name = hfp_ag_default_service_name; 3129 } 3130 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3131 3132 /* 3133 * 0x01 – Ability to reject a call 3134 * 0x00 – No ability to reject a call 3135 */ 3136 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3137 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3138 3139 // Construct SupportedFeatures for SDP bitmap: 3140 // 3141 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3142 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3143 // 3144 // Wide band speech (bit 5) requires Codec negotiation 3145 // 3146 uint16_t sdp_features = supported_features & 0x1f; 3147 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3148 sdp_features |= 1 << 5; 3149 } 3150 3151 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3152 sdp_features |= 1 << 6; 3153 } 3154 3155 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3156 sdp_features |= 1 << 7; 3157 } 3158 3159 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3160 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3161 } 3162 3163 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3164 btstack_assert(callback != NULL); 3165 3166 hfp_ag_callback = callback; 3167 hfp_set_ag_callback(callback); 3168 } 3169 3170 void hfp_ag_register_custom_call_sm_handler(bool (*handler)(hfp_ag_call_event_t event)){ 3171 hfp_ag_custom_call_sm_handler = handler; 3172 } 3173