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