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