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 // in-band ring tone is active on SLC if supported 101 static bool hfp_ag_in_band_ring_tone_active; 102 103 // codecs 104 static uint8_t hfp_ag_codecs_nr; 105 static uint8_t hfp_ag_codecs[HFP_MAX_NUM_CODECS]; 106 107 // AG indicators 108 static uint16_t hfp_ag_indicators_nr; 109 static hfp_ag_indicator_t hfp_ag_indicators[HFP_MAX_NUM_INDICATORS]; 110 111 // generic status indicators 112 static uint16_t hfp_ag_generic_status_indicators_nr; 113 static hfp_generic_status_indicator_t hfp_ag_generic_status_indicators[HFP_MAX_NUM_INDICATORS]; 114 115 static uint16_t hfp_ag_call_hold_services_nr; 116 static char * hfp_ag_call_hold_services[6]; 117 118 static hfp_response_and_hold_state_t hfp_ag_response_and_hold_state; 119 static bool hfp_ag_response_and_hold_active = false; 120 121 // Subscriber information entries 122 static hfp_phone_number_t * hfp_ag_subscriber_numbers; 123 static int hfp_ag_subscriber_numbers_count; 124 125 // call state 126 static btstack_timer_source_t hfp_ag_ring_timeout; 127 128 // code 129 static int hfp_ag_get_ag_indicators_nr(hfp_connection_t * hfp_connection){ 130 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 131 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 132 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 133 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 134 } 135 return hfp_connection->ag_indicators_nr; 136 } 137 138 hfp_ag_indicator_t * hfp_ag_get_ag_indicators(hfp_connection_t * hfp_connection){ 139 // TODO: save only value, and value changed in the hfp_connection? 140 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 141 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 142 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 143 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 144 } 145 return (hfp_ag_indicator_t *)&(hfp_connection->ag_indicators); 146 } 147 148 static hfp_ag_indicator_t * get_ag_indicator_for_name(const char * name){ 149 int i; 150 for (i = 0; i < hfp_ag_indicators_nr; i++){ 151 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 152 return &hfp_ag_indicators[i]; 153 } 154 } 155 return NULL; 156 } 157 158 static int get_ag_indicator_index_for_name(const char * name){ 159 int i; 160 for (i = 0; i < hfp_ag_indicators_nr; i++){ 161 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 162 return i; 163 } 164 } 165 return -1; 166 } 167 168 static hfp_connection_t * get_hfp_ag_connection_context_for_acl_handle(uint16_t handle){ 169 btstack_linked_list_iterator_t it; 170 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 171 while (btstack_linked_list_iterator_has_next(&it)){ 172 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 173 if (hfp_connection->acl_handle != handle) continue; 174 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 175 return hfp_connection; 176 } 177 return NULL; 178 } 179 180 static bool has_in_band_ring_tone(void){ 181 return get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) != 0; 182 } 183 184 static int use_in_band_tone(hfp_connection_t *hfp_connection) { 185 return hfp_connection->ag_in_band_ring_tone_active ? 1 : 0; 186 } 187 188 static int has_codec_negotiation_feature(hfp_connection_t * hfp_connection){ 189 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_CODEC_NEGOTIATION); 190 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_CODEC_NEGOTIATION); 191 return hf && ag; 192 } 193 194 static int has_call_waiting_and_3way_calling_feature(hfp_connection_t * hfp_connection){ 195 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_THREE_WAY_CALLING); 196 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_THREE_WAY_CALLING); 197 return hf && ag; 198 } 199 200 static int has_hf_indicators_feature(hfp_connection_t * hfp_connection){ 201 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_HF_INDICATORS); 202 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_HF_INDICATORS); 203 return hf && ag; 204 } 205 206 /* unsolicited responses */ 207 208 static int hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection_t * hfp_connection){ 209 char buffer[40]; 210 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", 211 HFP_CHANGE_IN_BAND_RING_TONE_SETTING, use_in_band_tone(hfp_connection)); 212 buffer[sizeof(buffer) - 1] = 0; 213 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 214 } 215 216 static int hfp_ag_exchange_supported_features_cmd(uint16_t cid){ 217 char buffer[40]; 218 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n\r\nOK\r\n", 219 HFP_SUPPORTED_FEATURES, hfp_ag_supported_features); 220 buffer[sizeof(buffer) - 1] = 0; 221 return send_str_over_rfcomm(cid, buffer); 222 } 223 224 static int hfp_ag_send_ok(uint16_t cid){ 225 char buffer[10]; 226 snprintf(buffer, sizeof(buffer), "\r\nOK\r\n"); 227 buffer[sizeof(buffer) - 1] = 0; 228 return send_str_over_rfcomm(cid, buffer); 229 } 230 231 static int hfp_ag_send_ring(uint16_t cid){ 232 return send_str_over_rfcomm(cid, (char *) "\r\nRING\r\n"); 233 } 234 235 static int hfp_ag_send_no_carrier(uint16_t cid){ 236 char buffer[15]; 237 snprintf(buffer, sizeof(buffer), "\r\nNO CARRIER\r\n"); 238 buffer[sizeof(buffer) - 1] = 0; 239 return send_str_over_rfcomm(cid, buffer); 240 } 241 242 static int hfp_ag_send_clip(uint16_t cid){ 243 char buffer[50]; 244 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", HFP_ENABLE_CLIP, 245 hfp_gsm_clip_number(), hfp_gsm_clip_type()); 246 buffer[sizeof(buffer) - 1] = 0; 247 return send_str_over_rfcomm(cid, buffer); 248 } 249 250 static int hfp_send_subscriber_number_cmd(uint16_t cid, uint8_t type, const char * number){ 251 char buffer[50]; 252 snprintf(buffer, sizeof(buffer), "\r\n%s: ,\"%s\",%u, , \r\n", 253 HFP_SUBSCRIBER_NUMBER_INFORMATION, number, type); 254 buffer[sizeof(buffer) - 1] = 0; 255 return send_str_over_rfcomm(cid, buffer); 256 } 257 258 static int hfp_ag_send_phone_number_for_voice_tag_cmd(uint16_t cid){ 259 char buffer[50]; 260 snprintf(buffer, sizeof(buffer), "\r\n%s: %s\r\n", 261 HFP_PHONE_NUMBER_FOR_VOICE_TAG, hfp_gsm_clip_number()); 262 buffer[sizeof(buffer) - 1] = 0; 263 return send_str_over_rfcomm(cid, buffer); 264 } 265 266 static int hfp_ag_send_call_waiting_notification(uint16_t cid){ 267 char buffer[50]; 268 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", 269 HFP_ENABLE_CALL_WAITING_NOTIFICATION, hfp_gsm_clip_number(), 270 hfp_gsm_clip_type()); 271 buffer[sizeof(buffer) - 1] = 0; 272 return send_str_over_rfcomm(cid, buffer); 273 } 274 275 static int hfp_ag_send_error(uint16_t cid){ 276 char buffer[10]; 277 snprintf(buffer, sizeof(buffer), "\r\nERROR\r\n"); 278 buffer[sizeof(buffer) - 1] = 0; 279 return send_str_over_rfcomm(cid, buffer); 280 } 281 282 static int hfp_ag_send_report_extended_audio_gateway_error(uint16_t cid, uint8_t error){ 283 char buffer[20]; 284 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 285 HFP_EXTENDED_AUDIO_GATEWAY_ERROR, error); 286 buffer[sizeof(buffer) - 1] = 0; 287 return send_str_over_rfcomm(cid, buffer); 288 } 289 290 // get size for indicator string 291 static int hfp_ag_indicators_string_size(hfp_connection_t * hfp_connection, int i){ 292 // template: ("$NAME",($MIN,$MAX)) 293 return 8 + (int) strlen(hfp_ag_get_ag_indicators(hfp_connection)[i].name) 294 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range) 295 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range); 296 } 297 298 // store indicator 299 static void hfp_ag_indicators_string_store(hfp_connection_t * hfp_connection, int i, uint8_t * buffer, uint16_t buffer_size){ 300 snprintf((char *)buffer, buffer_size, "(\"%s\",(%d,%d)),", 301 hfp_ag_get_ag_indicators(hfp_connection)[i].name, 302 hfp_ag_get_ag_indicators(hfp_connection)[i].min_range, 303 hfp_ag_get_ag_indicators(hfp_connection)[i].max_range); 304 ((char *)buffer)[buffer_size - 1] = 0; 305 } 306 307 // structure: header [indicator [comma indicator]] footer 308 static int hfp_ag_indicators_cmd_generator_num_segments(hfp_connection_t * hfp_connection){ 309 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 310 if (!num_indicators) return 2; 311 return 3 + ((num_indicators-1) * 2); 312 } 313 314 // get size of individual segment for hfp_ag_retrieve_indicators_cmd 315 static int hfp_ag_indicators_cmd_generator_get_segment_len(hfp_connection_t * hfp_connection, int index){ 316 if (index == 0) { 317 return (uint16_t) strlen(HFP_INDICATOR) + 3; // "\n\r%s:"" 318 } 319 index--; 320 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 321 int indicator_index = index >> 1; 322 if ((index & 1) == 0){ 323 return hfp_ag_indicators_string_size(hfp_connection, indicator_index); 324 } 325 if (indicator_index == (num_indicators - 1)){ 326 return 8; // "\r\n\r\nOK\r\n" 327 } 328 return 1; // comma 329 } 330 331 static void hfp_ag_indicators_cmd_generator_store_segment(hfp_connection_t * hfp_connection, int index, uint8_t * buffer, uint16_t buffer_size){ 332 if (index == 0){ 333 *buffer++ = '\r'; 334 *buffer++ = '\n'; 335 int len = (uint16_t) strlen(HFP_INDICATOR); 336 (void)memcpy(buffer, HFP_INDICATOR, len); 337 buffer += len; 338 *buffer++ = ':'; 339 return; 340 } 341 index--; 342 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 343 int indicator_index = index >> 1; 344 if ((index & 1) == 0){ 345 hfp_ag_indicators_string_store(hfp_connection, indicator_index, buffer, buffer_size); 346 return; 347 } 348 if (indicator_index == (num_indicators-1)){ 349 (void)memcpy(buffer, "\r\n\r\nOK\r\n", 8); 350 return; 351 } 352 *buffer = ','; 353 } 354 355 static int hfp_ag_generic_indicators_join(char * buffer, int buffer_size){ 356 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 357 int i; 358 int offset = 0; 359 for (i = 0; i < (hfp_ag_generic_status_indicators_nr - 1); i++) { 360 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_generic_status_indicators[i].uuid); 361 } 362 if (i < hfp_ag_generic_status_indicators_nr){ 363 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_generic_status_indicators[i].uuid); 364 } 365 return offset; 366 } 367 368 static int hfp_ag_generic_indicators_initial_status_join(char * buffer, int buffer_size){ 369 if (buffer_size < (hfp_ag_generic_status_indicators_nr * 3)) return 0; 370 int i; 371 int offset = 0; 372 for (i = 0; i < hfp_ag_generic_status_indicators_nr; i++) { 373 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); 374 } 375 return offset; 376 } 377 378 static int hfp_ag_indicators_status_join(char * buffer, int buffer_size){ 379 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 380 int i; 381 int offset = 0; 382 for (i = 0; i < (hfp_ag_indicators_nr-1); i++) { 383 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_indicators[i].status); 384 } 385 if (i<hfp_ag_indicators_nr){ 386 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_indicators[i].status); 387 } 388 return offset; 389 } 390 391 static int hfp_ag_call_services_join(char * buffer, int buffer_size){ 392 if (buffer_size < (hfp_ag_call_hold_services_nr * 3)) return 0; 393 int i; 394 int offset = snprintf(buffer, buffer_size, "("); 395 for (i = 0; i < (hfp_ag_call_hold_services_nr-1); i++) { 396 offset += snprintf(buffer+offset, buffer_size-offset, "%s,", hfp_ag_call_hold_services[i]); 397 } 398 if (i<hfp_ag_call_hold_services_nr){ 399 offset += snprintf(buffer+offset, buffer_size-offset, "%s)", hfp_ag_call_hold_services[i]); 400 } 401 return offset; 402 } 403 404 static int hfp_ag_send_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, 405 int start_segment, int num_segments, 406 int (*get_segment_len)(hfp_connection_t * hfp_connection, int segment), 407 void (*store_segment) (hfp_connection_t * hfp_connection, int segment, uint8_t * buffer, uint16_t buffer_size)){ 408 409 // assumes: can send now == true 410 // assumes: num segments > 0 411 // assumes: individual segments are smaller than MTU 412 rfcomm_reserve_packet_buffer(); 413 int mtu = rfcomm_get_max_frame_size(cid); 414 uint8_t * data = rfcomm_get_outgoing_buffer(); 415 int offset = 0; 416 int segment = start_segment; 417 while (segment < num_segments){ 418 int segment_len = get_segment_len(hfp_connection, segment); 419 if ((offset + segment_len + 1) > mtu) break; 420 // append segment. As it appends a '\0', we provide a buffer one byte larger 421 store_segment(hfp_connection, segment, data+offset, segment_len + 1); 422 offset += segment_len; 423 segment++; 424 } 425 rfcomm_send_prepared(cid, offset); 426 #ifdef ENABLE_HFP_AT_MESSAGES 427 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_SENT, (char *) data); 428 #endif 429 return segment; 430 } 431 432 // returns next segment to store 433 static int hfp_ag_send_retrieve_indicators_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, int start_segment){ 434 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 435 return hfp_ag_send_cmd_via_generator(cid, hfp_connection, start_segment, num_segments, 436 hfp_ag_indicators_cmd_generator_get_segment_len, 437 hfp_ag_indicators_cmd_generator_store_segment); 438 } 439 440 static int hfp_ag_send_retrieve_indicators_status_cmd(uint16_t cid){ 441 char buffer[40]; 442 const int size = sizeof(buffer); 443 int offset = snprintf(buffer, size, "\r\n%s:", HFP_INDICATOR); 444 offset += hfp_ag_indicators_status_join(buffer+offset, size-offset-9); 445 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 446 return send_str_over_rfcomm(cid, buffer); 447 } 448 449 static int hfp_ag_send_retrieve_can_hold_call_cmd(uint16_t cid){ 450 char buffer[40]; 451 const int size = sizeof(buffer); 452 int offset = snprintf(buffer, size, "\r\n%s:", HFP_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES); 453 offset += hfp_ag_call_services_join(buffer+offset, size-offset-9); 454 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 455 return send_str_over_rfcomm(cid, buffer); 456 } 457 458 459 static int hfp_ag_send_list_supported_generic_status_indicators_cmd(uint16_t cid){ 460 return hfp_ag_send_ok(cid); 461 } 462 463 static int hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(uint16_t cid){ 464 char buffer[40]; 465 const int size = sizeof(buffer); 466 int offset = snprintf(buffer, size, "\r\n%s:(", HFP_GENERIC_STATUS_INDICATOR); 467 offset += hfp_ag_generic_indicators_join(buffer + offset, size - offset - 10); 468 offset += snprintf(buffer+offset, size-offset, ")\r\n\r\nOK\r\n"); 469 return send_str_over_rfcomm(cid, buffer); 470 } 471 472 static int hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(uint16_t cid){ 473 char buffer[40]; 474 int offset = hfp_ag_generic_indicators_initial_status_join(buffer, sizeof(buffer) - 7); 475 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\nOK\r\n"); 476 return send_str_over_rfcomm(cid, buffer); 477 } 478 479 static int hfp_ag_send_transfer_ag_indicators_status_cmd(uint16_t cid, hfp_ag_indicator_t * indicator){ 480 char buffer[20]; 481 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d\r\n", 482 HFP_TRANSFER_AG_INDICATOR_STATUS, indicator->index, 483 indicator->status); 484 buffer[sizeof(buffer) - 1] = 0; 485 return send_str_over_rfcomm(cid, buffer); 486 } 487 488 static int hfp_ag_send_report_network_operator_name_cmd(uint16_t cid, hfp_network_opearator_t op){ 489 char buffer[41]; 490 if (strlen(op.name) == 0){ 491 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,,\r\n\r\nOK\r\n", HFP_QUERY_OPERATOR_SELECTION, op.mode); 492 } else { 493 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d,", HFP_QUERY_OPERATOR_SELECTION, op.mode, op.format); 494 offset += snprintf(buffer+offset, 16, "%s", op.name); 495 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n\r\nOK\r\n"); 496 } 497 return send_str_over_rfcomm(cid, buffer); 498 } 499 500 static inline int hfp_ag_send_cmd_with_space_and_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 } 505 506 507 static inline int hfp_ag_send_cmd_with_int(uint16_t cid, const char * cmd, uint8_t value){ 508 char buffer[30]; 509 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n", cmd, value); 510 return send_str_over_rfcomm(cid, buffer); 511 } 512 513 static int hfp_ag_send_suggest_codec_cmd(uint16_t cid, uint8_t codec){ 514 return hfp_ag_send_cmd_with_int(cid, HFP_CONFIRM_COMMON_CODEC, codec); 515 } 516 517 static int hfp_ag_send_set_speaker_gain_cmd(uint16_t cid, uint8_t gain){ 518 return hfp_ag_send_cmd_with_int(cid, HFP_SET_SPEAKER_GAIN, gain); 519 } 520 521 static int hfp_ag_send_set_microphone_gain_cmd(uint16_t cid, uint8_t gain){ 522 return hfp_ag_send_cmd_with_int(cid, HFP_SET_MICROPHONE_GAIN, gain); 523 } 524 525 static int hfp_ag_send_set_response_and_hold(uint16_t cid, int state){ 526 return hfp_ag_send_cmd_with_space_and_int(cid, HFP_RESPONSE_AND_HOLD, state); 527 } 528 529 static int hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection_t * hfp_connection){ 530 char buffer[30]; 531 uint8_t evra_enabled = hfp_connection->enhanced_voice_recognition_enabled ? 1 : 0; 532 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, evra_enabled, hfp_connection->ag_vra_state); 533 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 534 } 535 536 static int hfp_ag_send_voice_recognition_cmd(hfp_connection_t * hfp_connection, uint8_t activate_voice_recognition){ 537 char buffer[30]; 538 if (hfp_connection->enhanced_voice_recognition_enabled){ 539 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition, hfp_connection->ag_vra_state); 540 } else { 541 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition); 542 } 543 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 544 } 545 546 static int hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection_t * hfp_connection){ 547 char buffer[HFP_VR_TEXT_HEADER_SIZE + HFP_MAX_VR_TEXT_SIZE]; 548 snprintf(buffer, sizeof(buffer), "\r\n%s: 1,%d,%X,%d,%d,\"%s\"\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, 549 hfp_connection->ag_vra_state, 550 hfp_connection->ag_msg.text_id, 551 hfp_connection->ag_msg.text_type, 552 hfp_connection->ag_msg.text_operation, 553 hfp_connection->ag_msg.text); 554 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 555 } 556 557 static uint8_t hfp_ag_suggest_codec(hfp_connection_t *hfp_connection){ 558 if (hfp_connection->sco_for_msbc_failed) return HFP_CODEC_CVSD; 559 560 #ifdef ENABLE_HFP_SUPER_WIDE_BAND_SPEECH 561 if (hfp_supports_codec(HFP_CODEC_LC3_SWB, hfp_ag_codecs_nr, hfp_ag_codecs)){ 562 if (hfp_supports_codec(HFP_CODEC_LC3_SWB, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 563 return HFP_CODEC_LC3_SWB; 564 } 565 } 566 #endif 567 568 #ifdef ENABLE_HFP_WIDE_BAND_SPEECH 569 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_ag_codecs_nr, hfp_ag_codecs)){ 570 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 571 return HFP_CODEC_MSBC; 572 } 573 } 574 #endif 575 576 return HFP_CODEC_CVSD; 577 } 578 579 /* state machines */ 580 581 static uint8_t hfp_ag_esco_s4_supported(hfp_connection_t * hfp_connection){ 582 return (hfp_connection->remote_supported_features & (1<<HFP_HFSF_ESCO_S4)) && (hfp_ag_supported_features & (1 << HFP_AGSF_ESCO_S4)); 583 } 584 585 static int codecs_exchange_state_machine(hfp_connection_t * hfp_connection){ 586 /* events ( == commands): 587 HFP_CMD_AVAILABLE_CODECS == received AT+BAC with list of codecs 588 HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 589 hf_trigger_codec_connection_setup == received BCC 590 ag_trigger_codec_connection_setup == received from AG to send BCS 591 HFP_CMD_HF_CONFIRMED_CODEC == received AT+BCS 592 */ 593 switch (hfp_connection->codecs_state){ 594 case HFP_CODECS_EXCHANGED: 595 if (hfp_connection->command == HFP_CMD_AVAILABLE_CODECS){ 596 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 597 return 1; 598 } 599 break; 600 601 case HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE: 602 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 603 hfp_connection->ag_send_common_codec = true; 604 break; 605 default: 606 break; 607 } 608 609 if (hfp_connection->ag_send_common_codec){ 610 hfp_connection->ag_send_common_codec = false; 611 hfp_connection->codecs_state = HFP_CODECS_AG_SENT_COMMON_CODEC; 612 hfp_connection->suggested_codec = hfp_ag_suggest_codec(hfp_connection); 613 hfp_ag_send_suggest_codec_cmd(hfp_connection->rfcomm_cid, hfp_connection->suggested_codec); 614 return 1; 615 } 616 617 switch (hfp_connection->command){ 618 case HFP_CMD_AVAILABLE_CODECS: 619 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 620 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_LIST; 621 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 622 return 1; 623 } 624 625 switch (hfp_connection->codecs_state){ 626 case HFP_CODECS_AG_SENT_COMMON_CODEC: 627 hfp_connection->codecs_state = HFP_CODECS_AG_RESEND_COMMON_CODEC; 628 break; 629 default: 630 break; 631 } 632 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 633 return 1; 634 635 case HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 636 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE; 637 hfp_connection->establish_audio_connection = 1; 638 hfp_connection->sco_for_msbc_failed = 0; 639 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 640 return 1; 641 642 case HFP_CMD_HF_CONFIRMED_CODEC: 643 if (hfp_connection->codec_confirmed != hfp_connection->suggested_codec){ 644 hfp_connection->codecs_state = HFP_CODECS_ERROR; 645 hfp_ag_send_error(hfp_connection->rfcomm_cid); 646 return 1; 647 } 648 hfp_connection->negotiated_codec = hfp_connection->codec_confirmed; 649 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 650 log_info("hfp: codec confirmed: %s", (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? "mSBC" : "CVSD"); 651 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 652 // now, pick link settings 653 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 654 // configure SBC coded if needed 655 hfp_prepare_for_sco(hfp_connection); 656 return 1; 657 default: 658 break; 659 } 660 return 0; 661 } 662 663 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 664 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 665 hfp_emit_slc_connection_event(hfp_connection->local_role, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 666 667 // in-band ring tone is active if supported 668 hfp_connection->ag_in_band_ring_tone_active = has_in_band_ring_tone(); 669 670 // HFP 4.35: "When [...] a new Service Level Connection is established all indicators are activated by default." 671 uint16_t i; 672 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 673 hfp_connection->ag_indicators[i].enabled = 1; 674 } 675 676 // if active call exist, set per-hfp_connection state active, too (when audio is on) 677 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 678 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 679 } 680 // if AG is ringing, also start ringing on the HF 681 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 682 switch (hfp_gsm_callsetup_status()){ 683 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 684 hfp_ag_hf_start_ringing_incoming(hfp_connection); 685 break; 686 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 687 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 688 break; 689 default: 690 break; 691 } 692 } 693 } 694 695 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 696 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 697 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 698 int sent = 0; 699 switch(hfp_connection->command){ 700 case HFP_CMD_SUPPORTED_FEATURES: 701 switch(hfp_connection->state){ 702 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 703 case HFP_EXCHANGE_SUPPORTED_FEATURES: 704 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 705 if (has_codec_negotiation_feature(hfp_connection)){ 706 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 707 } else { 708 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 709 } 710 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 711 return 1; 712 default: 713 break; 714 } 715 break; 716 case HFP_CMD_AVAILABLE_CODECS: 717 sent = codecs_exchange_state_machine(hfp_connection); 718 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 719 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 720 } 721 return sent; 722 723 case HFP_CMD_RETRIEVE_AG_INDICATORS: 724 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 725 // HF requested AG Indicators and we did expect it 726 hfp_connection->send_ag_indicators_segment = 0; 727 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 728 // continue below in state switch 729 } 730 break; 731 732 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 733 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 734 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 735 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 736 return 1; 737 738 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 739 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 740 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 741 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 742 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 743 } else if (has_hf_indicators_feature(hfp_connection)){ 744 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 745 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 746 } else { 747 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 748 hfp_ag_slc_established(hfp_connection); 749 } 750 return 1; 751 752 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 753 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 754 if (has_hf_indicators_feature(hfp_connection)){ 755 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 756 } 757 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 758 if (!has_hf_indicators_feature(hfp_connection)){ 759 hfp_ag_slc_established(hfp_connection); 760 } 761 return 1; 762 763 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 764 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 765 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 766 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 767 return 1; 768 769 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 770 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 771 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 772 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 773 return 1; 774 775 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 776 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 777 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 778 hfp_ag_slc_established(hfp_connection); 779 return 1; 780 default: 781 break; 782 } 783 784 switch (hfp_connection->state){ 785 case HFP_RETRIEVE_INDICATORS: { 786 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 787 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 788 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 789 if (next_segment < num_segments){ 790 // prepare sending of next segment 791 hfp_connection->send_ag_indicators_segment = next_segment; 792 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 793 } else { 794 // done, go to next state 795 hfp_connection->send_ag_indicators_segment = 0; 796 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 797 } 798 return 1; 799 } 800 default: 801 break; 802 } 803 return 0; 804 } 805 806 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 807 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 808 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 809 return hf && ag; 810 } 811 812 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 813 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 814 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 815 return hf && ag; 816 } 817 818 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 819 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 820 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 821 return hf && ag; 822 } 823 824 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 825 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 826 return false; 827 } 828 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 829 return false; 830 } 831 if (hfp_connection->ag_vra_send_command){ 832 return false; 833 } 834 return true; 835 } 836 837 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 838 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 839 return false; 840 } 841 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 842 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 843 return true; 844 } 845 return false; 846 } 847 return true; 848 } 849 850 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 851 switch (hfp_connection->state){ 852 case HFP_W2_CONNECT_SCO: 853 case HFP_W4_SCO_CONNECTED: 854 case HFP_AUDIO_CONNECTION_ESTABLISHED: 855 return true; 856 default: 857 return false; 858 } 859 } 860 861 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 862 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 863 864 uint8_t event[6]; 865 event[0] = HCI_EVENT_HFP_META; 866 event[1] = sizeof(event) - 2; 867 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 868 little_endian_store_16(event, 3, acl_handle); 869 event[5] = status; 870 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 871 } 872 873 874 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 875 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 876 877 uint8_t event[8]; 878 event[0] = HCI_EVENT_HFP_META; 879 event[1] = sizeof(event) - 2; 880 event[2] = HFP_SUBEVENT_HF_INDICATOR; 881 little_endian_store_16(event, 3, acl_handle); 882 little_endian_store_16(event, 5, uuid); 883 event[7] = value; 884 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 885 } 886 887 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 888 if (!hfp_ag_callback) return; 889 890 uint8_t event[5]; 891 event[0] = HCI_EVENT_HFP_META; 892 event[1] = sizeof(event) - 2; 893 event[2] = event_subtype; 894 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 895 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 896 } 897 898 static void hfp_ag_emit_custom_command_event(hfp_connection_t * hfp_connection){ 899 btstack_assert(sizeof(hfp_connection->line_buffer) < (255-5)); 900 901 uint16_t line_len = (uint16_t) strlen((const char*)hfp_connection->line_buffer) + 1; 902 uint8_t event[7 + sizeof(hfp_connection->line_buffer)]; 903 event[0] = HCI_EVENT_HFP_META; 904 event[1] = 5 + line_len; 905 event[2] = HFP_SUBEVENT_CUSTOM_AT_COMMAND; 906 little_endian_store_16(event, 3, hfp_connection->acl_handle); 907 little_endian_store_16(event, 5, hfp_connection->custom_at_command_id); 908 memcpy(&event[7], hfp_connection->line_buffer, line_len); 909 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, 7 + line_len); 910 } 911 912 // @return status 913 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 914 uint8_t status = ERROR_CODE_SUCCESS; 915 switch (hfp_connection->vra_state_requested){ 916 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 917 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 918 status = hfp_ag_setup_audio_connection(hfp_connection); 919 if (status != ERROR_CODE_SUCCESS){ 920 hfp_connection->vra_state_requested = hfp_connection->vra_state; 921 hfp_emit_voice_recognition_enabled(hfp_connection, status); 922 break; 923 } 924 } 925 hfp_connection->enhanced_voice_recognition_enabled = true; 926 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 927 hfp_connection->vra_state_requested = hfp_connection->vra_state; 928 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 929 break; 930 931 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 932 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 933 hfp_connection->vra_state_requested = hfp_connection->vra_state; 934 935 // release audio connection only if it was opened after audio VR activated 936 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 937 hfp_trigger_release_audio_connection(hfp_connection); 938 } 939 940 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 941 break; 942 943 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 944 // open only if audio connection does not already exist 945 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 946 status = hfp_ag_setup_audio_connection(hfp_connection); 947 if (status != ERROR_CODE_SUCCESS){ 948 hfp_connection->vra_state_requested = hfp_connection->vra_state; 949 hfp_emit_voice_recognition_enabled(hfp_connection, status); 950 break; 951 } 952 } 953 954 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 955 hfp_connection->vra_state_requested = hfp_connection->vra_state; 956 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 957 958 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 959 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 960 } else { 961 hfp_connection->emit_vra_enabled_after_audio_established = true; 962 } 963 break; 964 965 default: 966 break; 967 } 968 return status; 969 } 970 971 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 972 uint8_t done = 0; 973 uint8_t status; 974 975 switch (hfp_connection->vra_state_requested){ 976 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 977 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 978 if (done == 0){ 979 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 980 } else { 981 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 982 } 983 hfp_connection->vra_state_requested = hfp_connection->vra_state; 984 return done; 985 986 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 987 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 988 if (done == 0){ 989 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 990 } else { 991 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 992 } 993 hfp_connection->vra_state_requested = hfp_connection->vra_state; 994 return done; 995 996 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 997 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 998 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 999 if (done == 0){ 1000 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1001 1002 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 1003 hfp_emit_voice_recognition_enabled(hfp_connection, done); 1004 } else { 1005 hfp_emit_voice_recognition_disabled(hfp_connection, done); 1006 } 1007 return 0; 1008 } 1009 status = hfp_ag_vra_state_machine_two(hfp_connection); 1010 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1011 1012 default: 1013 log_error("state %u", hfp_connection->vra_state_requested); 1014 btstack_assert(false); 1015 return 0; 1016 } 1017 } 1018 1019 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 1020 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 1021 return 0; 1022 } 1023 int done = 0; 1024 uint8_t status; 1025 1026 // VRA action initiated by AG 1027 if (hfp_connection->ag_vra_send_command){ 1028 hfp_connection->ag_vra_send_command = false; 1029 return hfp_ag_vra_send_command(hfp_connection); 1030 } 1031 1032 if (hfp_connection->ag_vra_requested_by_hf){ 1033 hfp_connection->ag_vra_requested_by_hf = false; 1034 1035 // HF initiatied voice recognition, parser extracted activation value 1036 switch (hfp_connection->ag_activate_voice_recognition_value){ 1037 case 0: 1038 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1039 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 1040 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1041 } 1042 break; 1043 1044 case 1: 1045 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1046 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1047 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1048 } 1049 break; 1050 1051 case 2: 1052 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1053 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1054 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1055 } 1056 break; 1057 default: 1058 break; 1059 } 1060 if (done == 0){ 1061 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1062 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1063 return 1; 1064 } 1065 1066 status = hfp_ag_vra_state_machine_two(hfp_connection); 1067 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1068 } 1069 1070 return 0; 1071 } 1072 1073 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1074 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 1075 return 0; 1076 } 1077 1078 int sent = codecs_exchange_state_machine(hfp_connection); 1079 if (sent) return 1; 1080 1081 if (has_in_band_ring_tone()){ 1082 if (hfp_connection->ag_in_band_ring_tone_active != hfp_ag_in_band_ring_tone_active) { 1083 hfp_connection->ag_in_band_ring_tone_active = hfp_ag_in_band_ring_tone_active; 1084 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection); 1085 return 1; 1086 } 1087 } 1088 1089 switch(hfp_connection->command){ 1090 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1091 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1092 return 1; 1093 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1094 if (hfp_connection->network_operator.format != 0){ 1095 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1096 } else { 1097 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1098 } 1099 return 1; 1100 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1101 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1102 return 1; 1103 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1104 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1105 return 1; 1106 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1107 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1108 return 1; 1109 default: 1110 break; 1111 } 1112 return 0; 1113 } 1114 1115 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1116 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1117 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1118 1119 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1120 1121 if (hfp_connection->release_audio_connection){ 1122 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1123 hfp_connection->release_audio_connection = 0; 1124 gap_disconnect(hfp_connection->sco_handle); 1125 return 1; 1126 } 1127 1128 // accept incoming audio connection (codec negotiation is not used) 1129 if (hfp_connection->accept_sco && (hfp_sco_setup_active() == false)){ 1130 // notify about codec selection if not done already 1131 if (hfp_connection->negotiated_codec == 0){ 1132 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1133 } 1134 // 1135 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1136 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1137 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1138 return 1; 1139 } 1140 1141 // run codecs exchange 1142 int sent = codecs_exchange_state_machine(hfp_connection); 1143 if (sent) return 1; 1144 1145 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1146 if (hfp_sco_setup_active()) return 0; 1147 if (hci_can_send_command_packet_now() == false) return 0; 1148 if (hfp_connection->establish_audio_connection){ 1149 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1150 hfp_connection->establish_audio_connection = 0; 1151 hfp_setup_synchronous_connection(hfp_connection); 1152 return 1; 1153 } 1154 return 0; 1155 } 1156 1157 static void hfp_ag_set_callsetup_indicator(void){ 1158 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1159 if (!indicator){ 1160 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1161 return; 1162 }; 1163 indicator->status = hfp_gsm_callsetup_status(); 1164 } 1165 1166 static void hfp_ag_set_callheld_indicator(void){ 1167 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1168 if (!indicator){ 1169 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1170 return; 1171 }; 1172 indicator->status = hfp_gsm_callheld_status(); 1173 } 1174 1175 // 1176 // transition implementations for hfp_ag_call_state_machine 1177 // 1178 1179 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1180 if (use_in_band_tone(hfp_connection)){ 1181 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1182 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1183 } else { 1184 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1185 } 1186 } 1187 1188 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1189 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1190 } 1191 1192 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1193 hfp_connection->ag_ring = 0; 1194 hfp_connection->ag_send_clip = 0; 1195 } 1196 1197 1198 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1199 btstack_linked_list_iterator_t it; 1200 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1201 while (btstack_linked_list_iterator_has_next(&it)){ 1202 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1203 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1204 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1205 1206 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1207 hfp_ag_run_for_context(hfp_connection); 1208 } 1209 } 1210 1211 static void hfp_ag_trigger_ring_and_clip(void) { 1212 btstack_linked_list_iterator_t it; 1213 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1214 while (btstack_linked_list_iterator_has_next(&it)){ 1215 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1216 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1217 switch (hfp_connection->call_state){ 1218 case HFP_CALL_INCOMING_RINGING: 1219 case HFP_CALL_OUTGOING_RINGING: 1220 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1221 // Queue RING on this connection 1222 hfp_connection->ag_ring = 1; 1223 1224 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1225 // "If the calling subscriber number information is available from the network, the AG shall issue the 1226 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1227 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1228 1229 // trigger next message 1230 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1231 break; 1232 default: 1233 break; 1234 } 1235 } 1236 } 1237 1238 // trigger RING and CLIP messages on connections that are ringing 1239 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1240 hfp_ag_trigger_ring_and_clip(); 1241 1242 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1243 btstack_run_loop_add_timer(timer); 1244 } 1245 1246 static void hfp_ag_ring_timeout_stop(void){ 1247 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1248 } 1249 1250 static void hfp_ag_start_ringing(void){ 1251 // setup ring timer 1252 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1253 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1254 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1255 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1256 1257 // emit start ringing 1258 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1259 1260 // send initial RING + CLIP 1261 hfp_ag_trigger_ring_and_clip(); 1262 } 1263 1264 static void hfp_ag_stop_ringing(void){ 1265 hfp_ag_ring_timeout_stop(); 1266 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1267 1268 btstack_linked_list_iterator_t it; 1269 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1270 while (btstack_linked_list_iterator_has_next(&it)){ 1271 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1272 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1273 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1274 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1275 hfp_ag_hf_stop_ringing(hfp_connection); 1276 } 1277 } 1278 1279 static void hfp_ag_trigger_incoming_call_idle(void){ 1280 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1281 if (indicator_index < 0) return; 1282 1283 // update callsetup state in connections 1284 btstack_linked_list_iterator_t it; 1285 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1286 while (btstack_linked_list_iterator_has_next(&it)){ 1287 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1288 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1289 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1290 1291 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1292 1293 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1294 1295 hfp_ag_run_for_context(hfp_connection); 1296 } 1297 1298 // start local ringing - started after connection state has been updated 1299 hfp_ag_start_ringing(); 1300 } 1301 1302 static void hfp_ag_trigger_outgoing_call(void){ 1303 btstack_linked_list_iterator_t it; 1304 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1305 while (btstack_linked_list_iterator_has_next(&it)){ 1306 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1307 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1308 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1309 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1310 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1311 } 1312 } 1313 } 1314 1315 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1316 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1317 1318 // trigger callsetup to be 1319 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1320 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1321 1322 int indicator_index ; 1323 1324 hfp_ag_set_callsetup_indicator(); 1325 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1326 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1327 1328 // put current call on hold if active 1329 if (put_call_on_hold){ 1330 log_info("AG putting current call on hold for new outgoing call"); 1331 hfp_ag_set_callheld_indicator(); 1332 indicator_index = get_ag_indicator_index_for_name("callheld"); 1333 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1334 } 1335 1336 // start audio if needed 1337 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1338 } 1339 1340 static void hfp_ag_transfer_indicator(const char * name){ 1341 int indicator_index = get_ag_indicator_index_for_name(name); 1342 if (indicator_index < 0) return; 1343 1344 btstack_linked_list_iterator_t it; 1345 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1346 while (btstack_linked_list_iterator_has_next(&it)){ 1347 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1348 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1349 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1350 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1351 hfp_ag_run_for_context(hfp_connection); 1352 } 1353 } 1354 1355 static void hfp_ag_transfer_callsetup_state(void){ 1356 hfp_ag_transfer_indicator("callsetup"); 1357 } 1358 1359 static void hfp_ag_transfer_call_state(void){ 1360 hfp_ag_transfer_indicator("call"); 1361 } 1362 1363 static void hfp_ag_transfer_callheld_state(void){ 1364 hfp_ag_transfer_indicator("callheld"); 1365 } 1366 1367 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1368 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1369 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1370 1371 hfp_ag_stop_ringing(); 1372 1373 btstack_linked_list_iterator_t it; 1374 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1375 while (btstack_linked_list_iterator_has_next(&it)){ 1376 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1377 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1378 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1379 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1380 1381 if (hfp_connection == source){ 1382 1383 if (use_in_band_tone(hfp_connection)){ 1384 hfp_connection->call_state = HFP_CALL_ACTIVE; 1385 } else { 1386 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1387 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1388 } 1389 1390 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1391 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1392 1393 } else { 1394 hfp_connection->call_state = HFP_CALL_IDLE; 1395 } 1396 hfp_ag_run_for_context(hfp_connection); 1397 } 1398 } 1399 1400 static void hfp_ag_ag_accept_call(void){ 1401 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1402 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1403 1404 hfp_ag_stop_ringing(); 1405 1406 btstack_linked_list_iterator_t it; 1407 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1408 while (btstack_linked_list_iterator_has_next(&it)){ 1409 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1410 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1411 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1412 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1413 1414 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1415 1416 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1417 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1418 1419 hfp_ag_run_for_context(hfp_connection); 1420 break; // only single 1421 } 1422 } 1423 1424 static void hfp_ag_trigger_reject_call(void){ 1425 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1426 1427 hfp_ag_stop_ringing(); 1428 1429 btstack_linked_list_iterator_t it; 1430 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1431 while (btstack_linked_list_iterator_has_next(&it)){ 1432 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1433 if (connection->local_role != HFP_ROLE_AG) continue; 1434 1435 switch (connection->call_state){ 1436 case HFP_CALL_INCOMING_RINGING: 1437 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1438 case HFP_CALL_OUTGOING_RINGING: 1439 case HFP_CALL_OUTGOING_INITIATED: 1440 case HFP_CALL_OUTGOING_DIALING: 1441 break; 1442 default: 1443 continue; 1444 } 1445 1446 connection->call_state = HFP_CALL_IDLE; 1447 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1448 1449 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1450 connection->release_audio_connection = 1; 1451 } 1452 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1453 hfp_ag_run_for_context(connection); 1454 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1455 } 1456 } 1457 1458 static void hfp_ag_trigger_terminate_call(void){ 1459 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1460 1461 // no ringing during call 1462 1463 btstack_linked_list_iterator_t it; 1464 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1465 while (btstack_linked_list_iterator_has_next(&it)){ 1466 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1467 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1468 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1469 1470 hfp_connection->call_state = HFP_CALL_IDLE; 1471 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1472 1473 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1474 hfp_connection->release_audio_connection = 1; 1475 } 1476 1477 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1478 hfp_ag_run_for_context(hfp_connection); 1479 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1480 } 1481 } 1482 1483 static void hfp_ag_set_call_indicator(void){ 1484 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1485 if (!indicator){ 1486 log_error("hfp_ag_set_call_state: call indicator is missing"); 1487 return; 1488 }; 1489 indicator->status = hfp_gsm_call_status(); 1490 } 1491 1492 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1493 btstack_linked_list_iterator_t it; 1494 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1495 while (btstack_linked_list_iterator_has_next(&it)){ 1496 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1497 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1498 if (hfp_connection->call_state == call_state) return hfp_connection; 1499 } 1500 return NULL; 1501 } 1502 1503 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1504 btstack_linked_list_iterator_t it; 1505 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1506 while (btstack_linked_list_iterator_has_next(&it)){ 1507 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1508 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1509 hfp_connection->send_response_and_hold_status = state + 1; 1510 } 1511 } 1512 1513 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1514 int indicator_index; 1515 switch (hfp_connection->call_state){ 1516 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1517 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1518 // we got event: audio hfp_connection established 1519 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1520 break; 1521 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1522 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1523 // we got event: audio hfp_connection established 1524 hfp_connection->call_state = HFP_CALL_ACTIVE; 1525 break; 1526 case HFP_CALL_W2_SEND_CALL_WAITING: 1527 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1528 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1529 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1530 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1531 break; 1532 default: 1533 break; 1534 } 1535 return 0; 1536 } 1537 1538 // queue 'error' to HF 1539 static void hfp_ag_queue_error(hfp_connection_t * hfp_connection){ 1540 hfp_connection->send_error++; 1541 } 1542 1543 // queue 'ok' to HF 1544 static void hfp_ag_queue_ok(hfp_connection_t * hfp_connection){ 1545 hfp_connection->ok_pending++; 1546 } 1547 1548 // functions extracted from hfp_ag_call_sm below 1549 static void hfp_ag_handle_reject_outgoing_call(void){ 1550 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1551 if (!hfp_connection){ 1552 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1553 return; 1554 } 1555 1556 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1557 hfp_connection->call_state = HFP_CALL_IDLE; 1558 hfp_ag_queue_error(hfp_connection); 1559 hfp_ag_run_for_context(hfp_connection); 1560 } 1561 1562 // hfp_connection is used to identify originating HF 1563 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1564 1565 // allow to intercept call statemachine events 1566 if (hfp_ag_custom_call_sm_handler != NULL){ 1567 bool handle_event = (*hfp_ag_custom_call_sm_handler)(event); 1568 if (!handle_event) return; 1569 } 1570 1571 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1572 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1573 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1574 1575 switch (event){ 1576 case HFP_AG_INCOMING_CALL: 1577 switch (hfp_gsm_call_status()){ 1578 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1579 switch (hfp_gsm_callsetup_status()){ 1580 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1581 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1582 hfp_ag_set_callsetup_indicator(); 1583 hfp_ag_trigger_incoming_call_idle(); 1584 log_info("AG rings"); 1585 break; 1586 default: 1587 break; 1588 } 1589 break; 1590 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1591 switch (hfp_gsm_callsetup_status()){ 1592 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1593 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1594 hfp_ag_set_callsetup_indicator(); 1595 hfp_ag_trigger_incoming_call_during_active_one(); 1596 log_info("AG call waiting"); 1597 break; 1598 default: 1599 break; 1600 } 1601 break; 1602 default: 1603 break; 1604 } 1605 break; 1606 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1607 switch (hfp_gsm_call_status()){ 1608 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1609 switch (hfp_gsm_callsetup_status()){ 1610 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1611 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1612 hfp_ag_set_call_indicator(); 1613 hfp_ag_set_callsetup_indicator(); 1614 hfp_ag_ag_accept_call(); 1615 log_info("AG answers call, accept call by GSM"); 1616 break; 1617 default: 1618 break; 1619 } 1620 break; 1621 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1622 switch (hfp_gsm_callsetup_status()){ 1623 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1624 log_info("AG: current call is placed on hold, incoming call gets active"); 1625 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1626 hfp_ag_set_callsetup_indicator(); 1627 hfp_ag_set_callheld_indicator(); 1628 hfp_ag_transfer_callsetup_state(); 1629 hfp_ag_transfer_callheld_state(); 1630 break; 1631 default: 1632 break; 1633 } 1634 break; 1635 default: 1636 break; 1637 } 1638 break; 1639 1640 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1641 switch (hfp_gsm_call_status()){ 1642 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1643 switch (hfp_gsm_callheld_status()){ 1644 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1645 log_info("AG: joining held call with active call"); 1646 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1647 hfp_ag_set_callheld_indicator(); 1648 hfp_ag_transfer_callheld_state(); 1649 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1650 break; 1651 default: 1652 break; 1653 } 1654 break; 1655 default: 1656 break; 1657 } 1658 break; 1659 1660 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1661 switch (hfp_gsm_call_status()){ 1662 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1663 switch (hfp_gsm_callsetup_status()){ 1664 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1665 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1666 hfp_ag_set_callsetup_indicator(); 1667 hfp_ag_set_call_indicator(); 1668 hfp_ag_hf_accept_call(hfp_connection); 1669 hfp_ag_queue_ok(hfp_connection); 1670 log_info("HF answers call, accept call by GSM"); 1671 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1672 break; 1673 default: 1674 break; 1675 } 1676 break; 1677 default: 1678 break; 1679 } 1680 break; 1681 1682 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1683 switch (hfp_gsm_call_status()){ 1684 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1685 switch (hfp_gsm_callsetup_status()){ 1686 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1687 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1688 hfp_ag_response_and_hold_active = true; 1689 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1690 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1691 // as with regular call 1692 hfp_ag_set_call_indicator(); 1693 hfp_ag_set_callsetup_indicator(); 1694 hfp_ag_ag_accept_call(); 1695 log_info("AG response and hold - hold by AG"); 1696 break; 1697 default: 1698 break; 1699 } 1700 break; 1701 default: 1702 break; 1703 } 1704 break; 1705 1706 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1707 switch (hfp_gsm_call_status()){ 1708 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1709 switch (hfp_gsm_callsetup_status()){ 1710 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1711 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1712 hfp_ag_response_and_hold_active = true; 1713 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1714 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1715 // as with regular call 1716 hfp_ag_set_call_indicator(); 1717 hfp_ag_set_callsetup_indicator(); 1718 hfp_ag_hf_accept_call(hfp_connection); 1719 log_info("AG response and hold - hold by HF"); 1720 break; 1721 default: 1722 break; 1723 } 1724 break; 1725 default: 1726 break; 1727 } 1728 break; 1729 1730 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1731 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1732 if (!hfp_ag_response_and_hold_active) break; 1733 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1734 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1735 hfp_ag_response_and_hold_active = false; 1736 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1737 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1738 log_info("Held Call accepted and active"); 1739 break; 1740 1741 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1742 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1743 if (!hfp_ag_response_and_hold_active) break; 1744 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1745 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1746 hfp_ag_response_and_hold_active = false; 1747 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1748 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1749 // from terminate by ag 1750 hfp_ag_set_call_indicator(); 1751 hfp_ag_trigger_terminate_call(); 1752 break; 1753 1754 case HFP_AG_TERMINATE_CALL_BY_HF: 1755 switch (hfp_gsm_call_status()){ 1756 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1757 switch (hfp_gsm_callsetup_status()){ 1758 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1759 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1760 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1761 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1762 hfp_ag_set_callsetup_indicator(); 1763 hfp_ag_transfer_callsetup_state(); 1764 hfp_ag_trigger_reject_call(); 1765 log_info("HF Rejected Incoming call, AG terminate call"); 1766 break; 1767 default: 1768 break; 1769 } 1770 break; 1771 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1772 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1773 hfp_ag_set_callsetup_indicator(); 1774 hfp_ag_set_call_indicator(); 1775 hfp_ag_trigger_terminate_call(); 1776 log_info("AG terminate call"); 1777 break; 1778 default: 1779 break; 1780 } 1781 break; 1782 1783 case HFP_AG_TERMINATE_CALL_BY_AG: 1784 switch (hfp_gsm_call_status()){ 1785 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1786 switch (hfp_gsm_callsetup_status()){ 1787 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1788 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1789 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1790 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1791 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1792 hfp_ag_set_callsetup_indicator(); 1793 hfp_ag_trigger_reject_call(); 1794 log_info("AG Rejected Incoming call, AG terminate call"); 1795 break; 1796 default: 1797 break; 1798 } 1799 break; 1800 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1801 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1802 hfp_ag_set_callsetup_indicator(); 1803 hfp_ag_set_call_indicator(); 1804 hfp_ag_trigger_terminate_call(); 1805 log_info("AG terminate call"); 1806 break; 1807 default: 1808 break; 1809 } 1810 break; 1811 case HFP_AG_CALL_DROPPED: 1812 switch (hfp_gsm_call_status()){ 1813 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1814 switch (hfp_gsm_callsetup_status()){ 1815 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1816 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1817 hfp_ag_stop_ringing(); 1818 break; 1819 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1820 log_info("Outgoing call interrupted\n"); 1821 break; 1822 default: 1823 break; 1824 } 1825 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1826 hfp_ag_set_callsetup_indicator(); 1827 hfp_ag_transfer_callsetup_state(); 1828 hfp_ag_trigger_terminate_call(); 1829 break; 1830 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1831 if (hfp_ag_response_and_hold_active) { 1832 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1833 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1834 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1835 } 1836 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1837 hfp_ag_set_callsetup_indicator(); 1838 hfp_ag_set_call_indicator(); 1839 hfp_ag_trigger_terminate_call(); 1840 log_info("AG notify call dropped"); 1841 break; 1842 default: 1843 break; 1844 } 1845 break; 1846 1847 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1848 // directly reject call if number of free slots is exceeded 1849 if (!hfp_gsm_call_possible()){ 1850 hfp_ag_queue_error(hfp_connection); 1851 hfp_ag_run_for_context(hfp_connection); 1852 break; 1853 } 1854 1855 // note: number not used currently 1856 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1857 1858 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1859 1860 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1861 break; 1862 1863 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1864 // directly reject call if number of free slots is exceeded 1865 if (!hfp_gsm_call_possible()) { 1866 // TODO: no error for user 1867 break; 1868 } 1869 switch (hfp_gsm_call_status()) { 1870 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1871 switch (hfp_gsm_callsetup_status()) { 1872 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1873 // note: number not used currently 1874 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1875 // init call state for all connections 1876 hfp_ag_trigger_outgoing_call(); 1877 // get first one and accept call 1878 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1879 if (hfp_connection) { 1880 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1881 } 1882 break; 1883 default: 1884 // TODO: no error for user 1885 break; 1886 } 1887 break; 1888 default: 1889 // TODO: no error for user 1890 break; 1891 } 1892 break; 1893 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1894 // directly reject call if number of free slots is exceeded 1895 if (!hfp_gsm_call_possible()){ 1896 hfp_ag_queue_error(hfp_connection); 1897 hfp_ag_run_for_context(hfp_connection); 1898 break; 1899 } 1900 1901 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1902 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1903 1904 log_info("Redial last number"); 1905 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1906 1907 if (strlen(last_dialed_number) > 0){ 1908 log_info("Last number exists: accept call"); 1909 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1910 } else { 1911 log_info("log_infoLast number missing: reject call"); 1912 hfp_ag_handle_reject_outgoing_call(); 1913 } 1914 break; 1915 } 1916 case HFP_AG_OUTGOING_CALL_REJECTED: 1917 hfp_ag_handle_reject_outgoing_call(); 1918 break; 1919 1920 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1921 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1922 if (!hfp_connection){ 1923 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1924 break; 1925 } 1926 1927 hfp_ag_queue_ok(hfp_connection); 1928 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1929 break; 1930 } 1931 case HFP_AG_OUTGOING_CALL_RINGING: 1932 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1933 if (!hfp_connection){ 1934 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1935 break; 1936 } 1937 1938 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1939 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1940 hfp_ag_set_callsetup_indicator(); 1941 hfp_ag_transfer_callsetup_state(); 1942 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1943 break; 1944 1945 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1946 // get outgoing call 1947 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1948 if (!hfp_connection){ 1949 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1950 } 1951 if (!hfp_connection){ 1952 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1953 break; 1954 } 1955 1956 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1957 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1958 hfp_connection->call_state = HFP_CALL_ACTIVE; 1959 hfp_ag_set_callsetup_indicator(); 1960 hfp_ag_set_call_indicator(); 1961 hfp_ag_transfer_call_state(); 1962 hfp_ag_transfer_callsetup_state(); 1963 if (callheld_status_call_on_hold_and_no_active_calls){ 1964 hfp_ag_set_callheld_indicator(); 1965 hfp_ag_transfer_callheld_state(); 1966 } 1967 hfp_ag_hf_stop_ringing(hfp_connection); 1968 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1969 break; 1970 } 1971 1972 case HFP_AG_CALL_HOLD_USER_BUSY: 1973 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1974 hfp_ag_set_callsetup_indicator(); 1975 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1976 hfp_connection->call_state = HFP_CALL_ACTIVE; 1977 log_info("AG: Call Waiting, User Busy"); 1978 break; 1979 1980 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1981 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1982 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1983 1984 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1985 if (call_held || call_setup_in_progress){ 1986 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1987 0, NULL); 1988 1989 } 1990 1991 if (call_setup_in_progress){ 1992 log_info("AG: Call Dropped, Accept new call"); 1993 hfp_ag_set_callsetup_indicator(); 1994 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1995 } else { 1996 log_info("AG: Call Dropped, Resume held call"); 1997 } 1998 if (call_held){ 1999 hfp_ag_set_callheld_indicator(); 2000 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2001 } 2002 2003 hfp_connection->call_state = HFP_CALL_ACTIVE; 2004 break; 2005 } 2006 2007 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 2008 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2009 // only update if callsetup changed 2010 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 2011 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 2012 NULL); 2013 2014 if (call_setup_in_progress){ 2015 log_info("AG: Call on Hold, Accept new call"); 2016 hfp_ag_set_callsetup_indicator(); 2017 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 2018 } else { 2019 log_info("AG: Swap calls"); 2020 } 2021 2022 hfp_ag_set_callheld_indicator(); 2023 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 2024 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2025 hfp_connection->call_state = HFP_CALL_ACTIVE; 2026 break; 2027 } 2028 2029 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 2030 // Adds a held call to the conversation. 2031 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 2032 log_info("AG: Join 3-way-call"); 2033 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 2034 hfp_ag_set_callheld_indicator(); 2035 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2036 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 2037 } 2038 hfp_connection->call_state = HFP_CALL_ACTIVE; 2039 break; 2040 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 2041 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 2042 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 2043 log_info("AG: Transfer call -> Connect two calls and disconnect"); 2044 hfp_ag_set_call_indicator(); 2045 hfp_ag_set_callheld_indicator(); 2046 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 2047 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 2048 hfp_connection->call_state = HFP_CALL_IDLE; 2049 break; 2050 2051 default: 2052 break; 2053 } 2054 2055 2056 } 2057 2058 2059 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 2060 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 2061 if (!active_call) return; 2062 2063 int idx = active_call->index; 2064 hfp_enhanced_call_dir_t dir = active_call->direction; 2065 hfp_enhanced_call_status_t status = active_call->enhanced_status; 2066 hfp_enhanced_call_mode_t mode = active_call->mode; 2067 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 2068 uint8_t type = active_call->clip_type; 2069 char * number = active_call->clip_number; 2070 2071 char buffer[100]; 2072 // TODO: check length of a buffer, to fit the MTU 2073 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2074 if (number){ 2075 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2076 } 2077 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2078 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, 2079 mode, mpty, type, number); 2080 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2081 } 2082 2083 // sends pending command, returns if command was sent 2084 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2085 if (hfp_connection->send_status_of_current_calls){ 2086 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2087 hfp_connection->next_call_index++; 2088 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2089 return 1; 2090 } else { 2091 // 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 2092 hfp_connection->next_call_index = 0; 2093 hfp_ag_queue_ok(hfp_connection); 2094 hfp_connection->send_status_of_current_calls = 0; 2095 } 2096 } 2097 2098 if (hfp_connection->ag_notify_incoming_call_waiting){ 2099 hfp_connection->ag_notify_incoming_call_waiting = 0; 2100 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2101 return 1; 2102 } 2103 2104 if (hfp_connection->send_error > 0){ 2105 hfp_connection->send_error--; 2106 hfp_connection->command = HFP_CMD_NONE; 2107 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2108 return 1; 2109 } 2110 2111 // note: before update AG indicators and ok_pending 2112 if (hfp_connection->send_response_and_hold_status){ 2113 int status = hfp_connection->send_response_and_hold_status - 1; 2114 hfp_connection->send_response_and_hold_status = 0; 2115 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2116 return 1; 2117 } 2118 2119 // note: before ok_pending and send_error to allow for unsolicited result on custom command 2120 if (hfp_connection->send_custom_message != NULL){ 2121 const char * message = hfp_connection->send_custom_message; 2122 hfp_connection->send_custom_message = NULL; 2123 send_str_over_rfcomm(hfp_connection->rfcomm_cid, message); 2124 hfp_emit_event(hfp_connection, HFP_SUBEVENT_CUSTOM_AT_MESSAGE_SENT, ERROR_CODE_SUCCESS); 2125 return 1; 2126 } 2127 2128 if (hfp_connection->ok_pending > 0){ 2129 hfp_connection->ok_pending--; 2130 hfp_connection->command = HFP_CMD_NONE; 2131 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2132 return 1; 2133 } 2134 2135 // update AG indicators only if enabled by AT+CMER=3,0,0,1 2136 if ((hfp_connection->enable_status_update_for_ag_indicators == 1) && (hfp_connection->ag_indicators_status_update_bitmap != 0)){ 2137 uint16_t i; 2138 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2139 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2140 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2141 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2142 return 1; 2143 } 2144 } 2145 } 2146 2147 if (hfp_connection->ag_send_no_carrier){ 2148 hfp_connection->ag_send_no_carrier = false; 2149 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2150 return 1; 2151 } 2152 2153 if (hfp_connection->send_phone_number_for_voice_tag){ 2154 hfp_connection->send_phone_number_for_voice_tag = 0; 2155 hfp_connection->command = HFP_CMD_NONE; 2156 hfp_ag_queue_ok(hfp_connection); 2157 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2158 return 1; 2159 } 2160 2161 if (hfp_connection->send_subscriber_number){ 2162 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2163 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2164 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2165 } else { 2166 hfp_connection->send_subscriber_number = 0; 2167 hfp_connection->next_subscriber_number_to_send = 0; 2168 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2169 } 2170 hfp_connection->command = HFP_CMD_NONE; 2171 return 1; 2172 } 2173 2174 if (hfp_connection->send_microphone_gain){ 2175 hfp_connection->send_microphone_gain = 0; 2176 hfp_connection->command = HFP_CMD_NONE; 2177 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2178 return 1; 2179 } 2180 2181 if (hfp_connection->send_speaker_gain){ 2182 hfp_connection->send_speaker_gain = 0; 2183 hfp_connection->command = HFP_CMD_NONE; 2184 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2185 return 1; 2186 } 2187 2188 if (hfp_connection->send_ag_status_indicators){ 2189 hfp_connection->send_ag_status_indicators = 0; 2190 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2191 return 1; 2192 } 2193 2194 if (hfp_connection->extended_audio_gateway_error){ 2195 uint8_t extended_audio_gateway_error = hfp_connection->extended_audio_gateway_error; 2196 hfp_connection->extended_audio_gateway_error = 0; 2197 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, extended_audio_gateway_error); 2198 2199 } 2200 return 0; 2201 } 2202 2203 // sends pending command, returns if command was sent 2204 static int hfp_ag_run_ring_and_clip(hfp_connection_t *hfp_connection){ 2205 // delay RING/CLIP until audio connection has been established for incoming calls 2206 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2207 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2208 if (hfp_connection->ag_ring){ 2209 hfp_connection->ag_ring = 0; 2210 hfp_connection->command = HFP_CMD_NONE; 2211 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2212 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2213 return 1; 2214 } 2215 2216 if (hfp_connection->ag_send_clip){ 2217 hfp_connection->ag_send_clip = 0; 2218 hfp_connection->command = HFP_CMD_NONE; 2219 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2220 return 1; 2221 } 2222 } 2223 return 0; 2224 } 2225 2226 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2227 2228 btstack_assert(hfp_connection != NULL); 2229 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2230 2231 // during SDP query, RFCOMM CID is not set 2232 if (hfp_connection->rfcomm_cid == 0) return; 2233 2234 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2235 hfp_connection->emit_vra_enabled_after_audio_established = false; 2236 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2237 } 2238 2239 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2240 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2241 hfp_connection->release_audio_connection = 0; 2242 gap_disconnect(hfp_connection->sco_handle); 2243 return; 2244 } 2245 2246 // configure NBS/WBS if needed using vendor-specific HCI commands 2247 if (hci_can_send_command_packet_now()) { 2248 #ifdef ENABLE_CC256X_ASSISTED_HFP 2249 // WBS Disassociate 2250 if (hfp_connection->cc256x_send_wbs_disassociate){ 2251 hfp_connection->cc256x_send_wbs_disassociate = false; 2252 hci_send_cmd(&hci_ti_wbs_disassociate); 2253 return; 2254 } 2255 // Write Codec Config 2256 if (hfp_connection->cc256x_send_write_codec_config){ 2257 hfp_connection->cc256x_send_write_codec_config = false; 2258 hfp_cc256x_write_codec_config(hfp_connection); 2259 return; 2260 } 2261 // WBS Associate 2262 if (hfp_connection->cc256x_send_wbs_associate){ 2263 hfp_connection->cc256x_send_wbs_associate = false; 2264 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2265 return; 2266 } 2267 #endif 2268 #ifdef ENABLE_BCM_PCM_WBS 2269 // Enable WBS 2270 if (hfp_connection->bcm_send_enable_wbs){ 2271 hfp_connection->bcm_send_enable_wbs = false; 2272 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2273 return; 2274 } 2275 // Write I2S/PCM params 2276 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2277 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2278 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2279 return; 2280 } 2281 // Disable WBS 2282 if (hfp_connection->bcm_send_disable_wbs){ 2283 hfp_connection->bcm_send_disable_wbs = false; 2284 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2285 return; 2286 } 2287 #endif 2288 #ifdef ENABLE_RTK_PCM_WBS 2289 // Configure CVSD vs. mSBC 2290 if (hfp_connection->rtk_send_sco_config){ 2291 hfp_connection->rtk_send_sco_config = false; 2292 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2293 log_info("RTK SCO: 16k + mSBC"); 2294 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2295 } else { 2296 log_info("RTK SCO: 16k + CVSD"); 2297 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2298 } 2299 return; 2300 } 2301 #endif 2302 #ifdef ENABLE_NXP_PCM_WBS 2303 if (hfp_connection->nxp_start_audio_handle != HCI_CON_HANDLE_INVALID){ 2304 hci_con_handle_t sco_handle = hfp_connection->nxp_start_audio_handle; 2305 hfp_connection->nxp_start_audio_handle = HCI_CON_HANDLE_INVALID; 2306 hci_send_cmd(&hci_nxp_host_pcm_i2s_audio_config, 0, 0, sco_handle, 0); 2307 return; 2308 } 2309 if (hfp_connection->nxp_stop_audio_handle != HCI_CON_HANDLE_INVALID){ 2310 hci_con_handle_t sco_handle = hfp_connection->nxp_stop_audio_handle; 2311 hfp_connection->nxp_stop_audio_handle = HCI_CON_HANDLE_INVALID; 2312 hci_send_cmd(&hci_nxp_host_pcm_i2s_audio_config, 1, 0, sco_handle, 0); 2313 return; 2314 } 2315 #endif 2316 } 2317 2318 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2319 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2320 hfp_finalize_connection_context(hfp_connection); 2321 return; 2322 } 2323 #endif 2324 2325 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2326 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2327 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2328 return; 2329 } 2330 2331 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2332 2333 if (!cmd_sent){ 2334 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2335 } 2336 2337 if (!cmd_sent){ 2338 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2339 } 2340 2341 if (!cmd_sent){ 2342 cmd_sent = call_setup_state_machine(hfp_connection); 2343 } 2344 2345 if (!cmd_sent){ 2346 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2347 } 2348 2349 if (!cmd_sent){ 2350 cmd_sent = hfp_ag_run_ring_and_clip(hfp_connection); 2351 } 2352 2353 if (!cmd_sent){ 2354 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2355 } 2356 2357 // disconnect 2358 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2359 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2360 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2361 } 2362 2363 if (cmd_sent){ 2364 hfp_connection->command = HFP_CMD_NONE; 2365 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2366 } 2367 } 2368 2369 static int hfp_parser_is_end_of_line(uint8_t byte){ 2370 return (byte == '\n') || (byte == '\r'); 2371 } 2372 2373 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2374 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2375 if (size < 1) return; 2376 uint8_t status = ERROR_CODE_SUCCESS; 2377 2378 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2379 #ifdef ENABLE_HFP_AT_MESSAGES 2380 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2381 #endif 2382 2383 // process messages byte-wise 2384 int pos; 2385 for (pos = 0; pos < size ; pos++){ 2386 hfp_parse(hfp_connection, packet[pos], 0); 2387 2388 // parse until end of line 2389 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2390 2391 hfp_generic_status_indicator_t * indicator; 2392 switch(hfp_connection->command){ 2393 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2394 hfp_connection->command = HFP_CMD_NONE; 2395 hfp_connection->ag_vra_requested_by_hf = true; 2396 break; 2397 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2398 hfp_connection->command = HFP_CMD_NONE; 2399 if (hfp_ag_response_and_hold_active){ 2400 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2401 } 2402 hfp_ag_queue_ok(hfp_connection); 2403 break; 2404 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2405 hfp_connection->command = HFP_CMD_NONE; 2406 switch(hfp_connection->ag_response_and_hold_action){ 2407 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2408 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2409 break; 2410 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2411 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2412 break; 2413 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2414 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2415 break; 2416 default: 2417 break; 2418 } 2419 hfp_ag_queue_ok(hfp_connection); 2420 break; 2421 case HFP_CMD_HF_INDICATOR_STATUS: 2422 hfp_connection->command = HFP_CMD_NONE; 2423 2424 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2425 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2426 switch (indicator->uuid){ 2427 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2428 if (hfp_connection->parser_indicator_value > 1) { 2429 hfp_ag_queue_error(hfp_connection); 2430 break; 2431 } 2432 hfp_ag_queue_ok(hfp_connection); 2433 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2434 break; 2435 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2436 if (hfp_connection->parser_indicator_value > 100){ 2437 hfp_ag_queue_error(hfp_connection); 2438 break; 2439 } 2440 hfp_ag_queue_ok(hfp_connection); 2441 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2442 break; 2443 default: 2444 hfp_ag_queue_error(hfp_connection); 2445 break; 2446 } 2447 } else { 2448 hfp_ag_queue_error(hfp_connection); 2449 } 2450 break; 2451 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2452 // expected by SLC state machine 2453 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2454 hfp_connection->send_ag_indicators_segment = 0; 2455 hfp_connection->send_ag_status_indicators = 1; 2456 break; 2457 case HFP_CMD_LIST_CURRENT_CALLS: 2458 hfp_connection->command = HFP_CMD_NONE; 2459 hfp_connection->next_call_index = 0; 2460 hfp_connection->send_status_of_current_calls = 1; 2461 break; 2462 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2463 hfp_connection->command = HFP_CMD_NONE; 2464 if (hfp_ag_subscriber_numbers_count == 0){ 2465 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2466 break; 2467 } 2468 hfp_connection->next_subscriber_number_to_send = 0; 2469 hfp_connection->send_subscriber_number = 1; 2470 break; 2471 case HFP_CMD_TRANSMIT_DTMF_CODES: 2472 { 2473 hfp_connection->command = HFP_CMD_NONE; 2474 char buffer[2]; 2475 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2476 buffer[1] = 0; 2477 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2478 break; 2479 } 2480 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2481 hfp_connection->command = HFP_CMD_NONE; 2482 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2483 break; 2484 case HFP_CMD_TURN_OFF_EC_AND_NR: 2485 hfp_connection->command = HFP_CMD_NONE; 2486 2487 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2488 hfp_ag_queue_ok(hfp_connection); 2489 status = ERROR_CODE_SUCCESS; 2490 } else { 2491 hfp_ag_queue_error(hfp_connection); 2492 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2493 } 2494 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2495 break; 2496 case HFP_CMD_CALL_ANSWERED: 2497 hfp_connection->command = HFP_CMD_NONE; 2498 log_info("HFP: ATA"); 2499 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2500 break; 2501 case HFP_CMD_HANG_UP_CALL: 2502 hfp_connection->command = HFP_CMD_NONE; 2503 hfp_ag_queue_ok(hfp_connection); 2504 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2505 break; 2506 case HFP_CMD_CALL_HOLD: { 2507 hfp_connection->command = HFP_CMD_NONE; 2508 hfp_ag_queue_ok(hfp_connection); 2509 2510 switch (hfp_connection->ag_call_hold_action){ 2511 case 0: 2512 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2513 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2514 break; 2515 case 1: 2516 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2517 // Where both a held and a waiting call exist, the above procedures shall apply to the 2518 // waiting call (i.e., not to the held call) in conflicting situation. 2519 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2520 break; 2521 case 2: 2522 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2523 // Where both a held and a waiting call exist, the above procedures shall apply to the 2524 // waiting call (i.e., not to the held call) in conflicting situation. 2525 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2526 break; 2527 case 3: 2528 // Adds a held call to the conversation. 2529 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2530 break; 2531 case 4: 2532 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2533 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2534 break; 2535 default: 2536 break; 2537 } 2538 hfp_connection->call_index = 0; 2539 break; 2540 } 2541 case HFP_CMD_CALL_PHONE_NUMBER: 2542 hfp_connection->command = HFP_CMD_NONE; 2543 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2544 break; 2545 case HFP_CMD_REDIAL_LAST_NUMBER: 2546 hfp_connection->command = HFP_CMD_NONE; 2547 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2548 break; 2549 case HFP_CMD_ENABLE_CLIP: 2550 hfp_connection->command = HFP_CMD_NONE; 2551 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2552 hfp_ag_queue_ok(hfp_connection); 2553 break; 2554 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2555 hfp_connection->command = HFP_CMD_NONE; 2556 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2557 hfp_ag_queue_ok(hfp_connection); 2558 break; 2559 case HFP_CMD_SET_SPEAKER_GAIN: 2560 hfp_connection->command = HFP_CMD_NONE; 2561 hfp_ag_queue_ok(hfp_connection); 2562 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2563 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2564 break; 2565 case HFP_CMD_SET_MICROPHONE_GAIN: 2566 hfp_connection->command = HFP_CMD_NONE; 2567 hfp_ag_queue_ok(hfp_connection); 2568 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2569 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2570 break; 2571 case HFP_CMD_CUSTOM_MESSAGE: 2572 hfp_connection->command = HFP_CMD_NONE; 2573 hfp_parser_reset_line_buffer(hfp_connection); 2574 log_info("Custom AT Command ID 0x%04x", hfp_connection->custom_at_command_id); 2575 hfp_ag_emit_custom_command_event(hfp_connection); 2576 break; 2577 case HFP_CMD_UNKNOWN: 2578 hfp_connection->command = HFP_CMD_NONE; 2579 hfp_ag_queue_error(hfp_connection); 2580 break; 2581 default: 2582 break; 2583 } 2584 } 2585 } 2586 2587 static void hfp_ag_run(void){ 2588 btstack_linked_list_iterator_t it; 2589 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2590 while (btstack_linked_list_iterator_has_next(&it)){ 2591 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2592 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2593 hfp_ag_run_for_context(hfp_connection); 2594 } 2595 } 2596 2597 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2598 hfp_connection_t * hfp_connection = NULL; 2599 switch (packet_type){ 2600 case RFCOMM_DATA_PACKET: 2601 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2602 btstack_assert(hfp_connection != NULL); 2603 2604 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2605 hfp_ag_run_for_context(hfp_connection); 2606 return; 2607 case HCI_EVENT_PACKET: 2608 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2609 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2610 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2611 btstack_assert(hfp_connection != NULL); 2612 2613 hfp_ag_run_for_context(hfp_connection); 2614 return; 2615 } 2616 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2617 break; 2618 default: 2619 break; 2620 } 2621 2622 hfp_ag_run(); 2623 } 2624 2625 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2626 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2627 hfp_ag_run(); 2628 } 2629 2630 void hfp_ag_init_codecs(uint8_t codecs_nr, const uint8_t * codecs){ 2631 btstack_assert(codecs_nr <= HFP_MAX_NUM_CODECS); 2632 if (codecs_nr > HFP_MAX_NUM_CODECS) return; 2633 2634 hfp_ag_codecs_nr = codecs_nr; 2635 uint8_t i; 2636 for (i=0; i < codecs_nr; i++){ 2637 hfp_ag_codecs[i] = codecs[i]; 2638 } 2639 } 2640 2641 void hfp_ag_init_supported_features(uint32_t supported_features){ 2642 hfp_ag_supported_features = supported_features; 2643 hfp_ag_in_band_ring_tone_active = has_in_band_ring_tone(); 2644 } 2645 2646 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2647 btstack_assert(ag_indicators_nr <= HFP_MAX_NUM_INDICATORS); 2648 if (ag_indicators_nr > HFP_MAX_NUM_CODECS) return; 2649 2650 hfp_ag_indicators_nr = ag_indicators_nr; 2651 (void)memcpy(hfp_ag_indicators, ag_indicators, 2652 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2653 } 2654 2655 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2656 btstack_assert(hf_indicators_nr <= HFP_MAX_NUM_INDICATORS); 2657 if (hf_indicators_nr > HFP_MAX_NUM_CODECS) return; 2658 2659 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2660 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2661 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2662 } 2663 2664 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2665 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2666 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2667 call_hold_services_nr * sizeof(char *)); 2668 } 2669 2670 2671 void hfp_ag_init(uint8_t rfcomm_channel_nr){ 2672 2673 hfp_init(); 2674 hfp_ag_call_hold_services_nr = 0; 2675 hfp_ag_response_and_hold_active = false; 2676 hfp_ag_indicators_nr = 0; 2677 hfp_ag_codecs_nr = 0; 2678 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2679 hfp_ag_in_band_ring_tone_active = has_in_band_ring_tone(); 2680 hfp_ag_subscriber_numbers = NULL; 2681 hfp_ag_subscriber_numbers_count = 0; 2682 2683 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2684 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2685 2686 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2687 2688 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2689 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2690 2691 hfp_gsm_init(); 2692 } 2693 2694 void hfp_ag_deinit(void){ 2695 hfp_deinit(); 2696 hfp_gsm_deinit(); 2697 2698 hfp_ag_callback = NULL; 2699 hfp_ag_supported_features = 0; 2700 hfp_ag_codecs_nr = 0; 2701 hfp_ag_indicators_nr = 0; 2702 hfp_ag_call_hold_services_nr = 0; 2703 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2704 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2705 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2706 hfp_ag_subscriber_numbers = NULL; 2707 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2708 hfp_ag_custom_call_sm_handler = NULL; 2709 } 2710 2711 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2712 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2713 } 2714 2715 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2716 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2717 if (!hfp_connection){ 2718 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2719 } 2720 2721 hfp_trigger_release_service_level_connection(hfp_connection); 2722 hfp_ag_run_for_context(hfp_connection); 2723 return ERROR_CODE_SUCCESS; 2724 } 2725 2726 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2727 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2728 if (!hfp_connection){ 2729 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2730 } 2731 2732 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2733 return ERROR_CODE_COMMAND_DISALLOWED; 2734 } 2735 2736 hfp_connection->extended_audio_gateway_error = error; 2737 hfp_ag_run_for_context(hfp_connection); 2738 return ERROR_CODE_SUCCESS; 2739 } 2740 2741 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2742 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2743 return ERROR_CODE_COMMAND_DISALLOWED; 2744 } 2745 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2746 return ERROR_CODE_COMMAND_DISALLOWED; 2747 } 2748 2749 hfp_connection->establish_audio_connection = 1; 2750 hfp_connection->sco_for_msbc_failed = 0; 2751 if (!has_codec_negotiation_feature(hfp_connection)){ 2752 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2753 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2754 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2755 // now, pick link settings 2756 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2757 #ifdef ENABLE_CC256X_ASSISTED_HFP 2758 hfp_cc256x_prepare_for_sco(hfp_connection); 2759 #endif 2760 return ERROR_CODE_SUCCESS; 2761 } 2762 2763 uint8_t i; 2764 bool codec_was_in_use = false; 2765 bool better_codec_can_be_used = false; 2766 2767 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2768 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2769 codec_was_in_use = true; 2770 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2771 better_codec_can_be_used = true; 2772 } 2773 } 2774 2775 if (!codec_was_in_use || better_codec_can_be_used){ 2776 hfp_connection->ag_send_common_codec = true; 2777 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2778 } 2779 return ERROR_CODE_SUCCESS; 2780 } 2781 2782 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2783 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2784 if (!hfp_connection){ 2785 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2786 } 2787 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2788 if (status != ERROR_CODE_SUCCESS){ 2789 return status; 2790 } 2791 hfp_ag_run_for_context(hfp_connection); 2792 return ERROR_CODE_SUCCESS; 2793 } 2794 2795 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2796 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2797 if (!hfp_connection){ 2798 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2799 } 2800 2801 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2802 return ERROR_CODE_COMMAND_DISALLOWED; 2803 } 2804 2805 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2806 if (status == ERROR_CODE_SUCCESS){ 2807 hfp_ag_run_for_context(hfp_connection); 2808 } 2809 return status; 2810 } 2811 2812 /** 2813 * @brief Enable in-band ring tone 2814 */ 2815 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2816 if (has_in_band_ring_tone() == false){ 2817 return; 2818 } 2819 if (hfp_ag_in_band_ring_tone_active == use_in_band_ring_tone){ 2820 return; 2821 } 2822 2823 hfp_ag_in_band_ring_tone_active = use_in_band_ring_tone; 2824 2825 btstack_linked_list_iterator_t it; 2826 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2827 while (btstack_linked_list_iterator_has_next(&it)){ 2828 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2829 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2830 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2831 hfp_ag_run_for_context(hfp_connection); 2832 } 2833 } 2834 2835 /** 2836 * @brief Called from GSM 2837 */ 2838 void hfp_ag_incoming_call(void){ 2839 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2840 } 2841 2842 void hfp_ag_outgoing_call_initiated(void) { 2843 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2844 } 2845 2846 /** 2847 * @brief number is stored. 2848 */ 2849 void hfp_ag_set_clip(uint8_t type, const char * number){ 2850 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2851 } 2852 2853 void hfp_ag_call_dropped(void){ 2854 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2855 } 2856 2857 // call from AG UI 2858 void hfp_ag_answer_incoming_call(void){ 2859 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2860 } 2861 2862 void hfp_ag_join_held_call(void){ 2863 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2864 } 2865 2866 void hfp_ag_terminate_call(void){ 2867 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2868 } 2869 2870 void hfp_ag_outgoing_call_ringing(void){ 2871 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2872 } 2873 2874 void hfp_ag_outgoing_call_established(void){ 2875 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2876 } 2877 2878 void hfp_ag_outgoing_call_rejected(void){ 2879 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2880 } 2881 2882 void hfp_ag_outgoing_call_accepted(void){ 2883 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2884 } 2885 2886 void hfp_ag_hold_incoming_call(void){ 2887 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2888 } 2889 2890 void hfp_ag_accept_held_incoming_call(void) { 2891 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2892 } 2893 2894 void hfp_ag_reject_held_incoming_call(void){ 2895 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2896 } 2897 2898 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2899 int indicator_index = get_ag_indicator_index_for_name(name); 2900 if (indicator_index < 0) return; 2901 hfp_ag_indicators[indicator_index].status = value; 2902 2903 btstack_linked_list_iterator_t it; 2904 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2905 while (btstack_linked_list_iterator_has_next(&it)){ 2906 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2907 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2908 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2909 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2910 continue; 2911 } 2912 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2913 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2914 hfp_ag_run_for_context(hfp_connection); 2915 } 2916 } 2917 2918 uint8_t hfp_ag_set_registration_status(int registration_status){ 2919 if ((registration_status < 0) || (registration_status > 1)){ 2920 return ERROR_CODE_COMMAND_DISALLOWED; 2921 } 2922 2923 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2924 2925 // if network goes away wihle a call is active: 2926 // - the call gets dropped 2927 // - we send NO CARRIER 2928 // NOTE: the CALL=0 has to be sent before NO CARRIER 2929 2930 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2931 2932 btstack_linked_list_iterator_t it; 2933 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2934 while (btstack_linked_list_iterator_has_next(&it)){ 2935 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2936 hfp_connection->ag_send_no_carrier = true; 2937 } 2938 } 2939 hfp_ag_set_ag_indicator("service", registration_status); 2940 return ERROR_CODE_SUCCESS; 2941 } 2942 2943 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2944 if ((signal_strength < 0) || (signal_strength > 5)){ 2945 return ERROR_CODE_COMMAND_DISALLOWED; 2946 } 2947 2948 hfp_ag_set_ag_indicator("signal", signal_strength); 2949 return ERROR_CODE_SUCCESS; 2950 } 2951 2952 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2953 if ((roaming_status < 0) || (roaming_status > 1)){ 2954 return ERROR_CODE_COMMAND_DISALLOWED; 2955 } 2956 2957 hfp_ag_set_ag_indicator("roam", roaming_status); 2958 return ERROR_CODE_SUCCESS; 2959 } 2960 2961 uint8_t hfp_ag_set_battery_level(int battery_level){ 2962 if ((battery_level < 0) || (battery_level > 5)){ 2963 return ERROR_CODE_COMMAND_DISALLOWED; 2964 } 2965 hfp_ag_set_ag_indicator("battchg", battery_level); 2966 return ERROR_CODE_SUCCESS; 2967 } 2968 2969 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2970 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2971 if (!hfp_connection){ 2972 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2973 } 2974 2975 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2976 return ERROR_CODE_COMMAND_DISALLOWED; 2977 } 2978 2979 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2980 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2981 if (!enhanced_vra_supported && !legacy_vra_supported){ 2982 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2983 } 2984 2985 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2986 return ERROR_CODE_COMMAND_DISALLOWED; 2987 } 2988 2989 hfp_connection->ag_activate_voice_recognition_value = 1; 2990 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2991 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2992 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2993 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2994 hfp_connection->ag_vra_send_command = true; 2995 hfp_ag_run_for_context(hfp_connection); 2996 return ERROR_CODE_SUCCESS; 2997 } 2998 2999 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 3000 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3001 if (!hfp_connection){ 3002 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3003 } 3004 3005 if (hfp_connection->emit_vra_enabled_after_audio_established){ 3006 return ERROR_CODE_COMMAND_DISALLOWED; 3007 } 3008 3009 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 3010 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 3011 3012 if (!enhanced_vra_supported && !legacy_vra_supported){ 3013 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3014 } 3015 3016 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 3017 return ERROR_CODE_COMMAND_DISALLOWED; 3018 } 3019 3020 hfp_connection->ag_activate_voice_recognition_value = 0; 3021 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 3022 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 3023 hfp_connection->ag_vra_send_command = true; 3024 hfp_ag_run_for_context(hfp_connection); 3025 return ERROR_CODE_SUCCESS; 3026 } 3027 3028 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 3029 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3030 if (!hfp_connection){ 3031 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3032 } 3033 3034 if (hfp_connection->emit_vra_enabled_after_audio_established){ 3035 return ERROR_CODE_COMMAND_DISALLOWED; 3036 } 3037 3038 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 3039 return ERROR_CODE_COMMAND_DISALLOWED; 3040 } 3041 3042 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 3043 return ERROR_CODE_COMMAND_DISALLOWED; 3044 } 3045 3046 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 3047 if (!enhanced_vra_supported ){ 3048 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3049 } 3050 3051 3052 hfp_connection->ag_vra_state = state; 3053 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 3054 hfp_connection->ag_vra_send_command = true; 3055 hfp_ag_run_for_context(hfp_connection); 3056 return ERROR_CODE_SUCCESS; 3057 } 3058 3059 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 3060 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 3061 } 3062 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 3063 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 3064 } 3065 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 3066 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 3067 } 3068 3069 3070 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){ 3071 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3072 if (!hfp_connection){ 3073 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3074 } 3075 3076 if (hfp_connection->emit_vra_enabled_after_audio_established){ 3077 return ERROR_CODE_COMMAND_DISALLOWED; 3078 } 3079 3080 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 3081 return ERROR_CODE_COMMAND_DISALLOWED; 3082 } 3083 3084 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 3085 return ERROR_CODE_COMMAND_DISALLOWED; 3086 } 3087 3088 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 3089 if (!enhanced_vra_supported ){ 3090 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3091 } 3092 3093 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 3094 if (!enhanced_vra_msg_supported ){ 3095 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3096 } 3097 3098 uint16_t message_len = (uint16_t) strlen(msg.text); 3099 3100 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 3101 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3102 } 3103 3104 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 3105 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3106 } 3107 3108 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 3109 hfp_connection->ag_msg = msg; 3110 hfp_connection->ag_vra_state = state; 3111 hfp_connection->ag_vra_send_command = true; 3112 hfp_ag_run_for_context(hfp_connection); 3113 3114 return ERROR_CODE_SUCCESS; 3115 } 3116 3117 3118 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3119 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3120 if (!hfp_connection){ 3121 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3122 } 3123 3124 if ((gain < 0) || (gain > 15)){ 3125 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3126 return ERROR_CODE_COMMAND_DISALLOWED; 3127 } 3128 3129 if (hfp_connection->microphone_gain != gain){ 3130 hfp_connection->microphone_gain = gain; 3131 hfp_connection->send_microphone_gain = 1; 3132 } 3133 hfp_ag_run_for_context(hfp_connection); 3134 return ERROR_CODE_SUCCESS; 3135 } 3136 3137 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3138 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3139 if (!hfp_connection){ 3140 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3141 } 3142 3143 if ((gain < 0) || (gain > 15)){ 3144 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3145 return ERROR_CODE_COMMAND_DISALLOWED; 3146 } 3147 3148 if (hfp_connection->speaker_gain != gain){ 3149 hfp_connection->speaker_gain = gain; 3150 hfp_connection->send_speaker_gain = 1; 3151 } 3152 hfp_ag_run_for_context(hfp_connection); 3153 return ERROR_CODE_SUCCESS; 3154 } 3155 3156 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3157 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3158 if (!hfp_connection){ 3159 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3160 } 3161 3162 hfp_ag_set_clip(0, number); 3163 hfp_connection->send_phone_number_for_voice_tag = 1; 3164 return ERROR_CODE_SUCCESS; 3165 } 3166 3167 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3168 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3169 if (!hfp_connection){ 3170 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3171 } 3172 3173 hfp_ag_queue_error(hfp_connection); 3174 return ERROR_CODE_SUCCESS; 3175 } 3176 3177 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3178 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3179 if (!hfp_connection){ 3180 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3181 } 3182 3183 hfp_ag_queue_ok(hfp_connection); 3184 return ERROR_CODE_SUCCESS; 3185 } 3186 3187 uint8_t hfp_ag_send_unsolicited_result_code(hci_con_handle_t acl_handle, const char * unsolicited_result_code){ 3188 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3189 if (!hfp_connection){ 3190 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3191 } 3192 if (hfp_connection->send_custom_message != NULL){ 3193 return ERROR_CODE_COMMAND_DISALLOWED; 3194 } 3195 hfp_connection->send_custom_message = unsolicited_result_code; 3196 hfp_ag_run_for_context(hfp_connection); 3197 return ERROR_CODE_SUCCESS; 3198 } 3199 3200 uint8_t hfp_ag_send_command_result_code(hci_con_handle_t acl_handle, bool ok){ 3201 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3202 if (!hfp_connection){ 3203 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3204 } 3205 if (ok){ 3206 hfp_ag_queue_ok(hfp_connection); 3207 } else { 3208 hfp_ag_queue_error(hfp_connection); 3209 } 3210 hfp_ag_run_for_context(hfp_connection); 3211 return ERROR_CODE_SUCCESS; 3212 } 3213 3214 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3215 hfp_ag_subscriber_numbers = numbers; 3216 hfp_ag_subscriber_numbers_count = numbers_count; 3217 } 3218 3219 void hfp_ag_clear_last_dialed_number(void){ 3220 hfp_gsm_clear_last_dialed_number(); 3221 } 3222 3223 void hfp_ag_set_last_dialed_number(const char * number){ 3224 hfp_gsm_set_last_dialed_number(number); 3225 } 3226 3227 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3228 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3229 if (!hfp_connection){ 3230 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3231 } 3232 3233 if (!hfp_connection->call_waiting_notification_enabled){ 3234 return ERROR_CODE_COMMAND_DISALLOWED; 3235 } 3236 3237 hfp_connection->ag_notify_incoming_call_waiting = 1; 3238 hfp_ag_run_for_context(hfp_connection); 3239 return ERROR_CODE_SUCCESS; 3240 } 3241 void hfp_ag_create_sdp_record_with_codecs(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, 3242 const char * name, uint8_t ability_to_reject_call, uint16_t supported_features, 3243 uint8_t codecs_nr, const uint8_t * codecs){ 3244 if (!name){ 3245 name = hfp_ag_default_service_name; 3246 } 3247 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3248 3249 /* 3250 * 0x01 – Ability to reject a call 3251 * 0x00 – No ability to reject a call 3252 */ 3253 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3254 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3255 3256 // Construct SupportedFeatures for SDP bitmap: 3257 // 3258 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3259 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3260 // 3261 // Wide band speech (bit 5) and LC3-SWB (bit 8) require Codec negotiation 3262 // 3263 uint16_t sdp_features = supported_features & 0x1f; 3264 3265 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3266 sdp_features |= 1 << 6; 3267 } 3268 3269 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3270 sdp_features |= 1 << 7; 3271 } 3272 3273 // codecs 3274 if ((supported_features & (1 << HFP_HFSF_CODEC_NEGOTIATION)) != 0){ 3275 uint8_t i; 3276 for (i=0;i<codecs_nr;i++){ 3277 switch (codecs[i]){ 3278 case HFP_CODEC_MSBC: 3279 sdp_features |= 1 << 5; 3280 break; 3281 case HFP_CODEC_LC3_SWB: 3282 sdp_features |= 1 << 8; 3283 break; 3284 default: 3285 break; 3286 } 3287 } 3288 } 3289 3290 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3291 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3292 } 3293 3294 void hfp_ag_create_sdp_record(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name, 3295 uint8_t ability_to_reject_call, uint16_t supported_features, int wide_band_speech){ 3296 uint8_t codecs_nr; 3297 const uint8_t * codecs; 3298 const uint8_t wide_band_codecs[] = { HFP_CODEC_MSBC }; 3299 if (wide_band_speech == 0){ 3300 codecs_nr = 0; 3301 codecs = NULL; 3302 } else { 3303 codecs_nr = 1; 3304 codecs = wide_band_codecs; 3305 } 3306 hfp_ag_create_sdp_record_with_codecs(service, service_record_handle, rfcomm_channel_nr, name, 3307 ability_to_reject_call, supported_features, codecs_nr, codecs); 3308 } 3309 3310 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3311 btstack_assert(callback != NULL); 3312 3313 hfp_ag_callback = callback; 3314 hfp_set_ag_callback(callback); 3315 } 3316 3317 void hfp_ag_register_custom_call_sm_handler(bool (*handler)(hfp_ag_call_event_t event)){ 3318 hfp_ag_custom_call_sm_handler = handler; 3319 } 3320 3321 void hfp_ag_register_custom_at_command(hfp_custom_at_command_t * custom_at_command){ 3322 hfp_register_custom_ag_command(custom_at_command); 3323 } 3324