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 MATTHIAS 24 * RINGWALD 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 btstack_packet_callback_registration_t hfp_ag_hci_event_callback_registration; 95 96 static uint16_t hfp_ag_supported_features; 97 98 // codecs 99 static uint8_t hfp_ag_codecs_nr; 100 static uint8_t hfp_ag_codecs[HFP_MAX_NUM_CODECS]; 101 102 // AG indicators 103 static int hfp_ag_indicators_nr; 104 static hfp_ag_indicator_t hfp_ag_indicators[HFP_MAX_NUM_INDICATORS]; 105 106 // generic status indicators 107 static int hfp_ag_generic_status_indicators_nr; 108 static hfp_generic_status_indicator_t hfp_ag_generic_status_indicators[HFP_MAX_NUM_INDICATORS]; 109 110 static int hfp_ag_call_hold_services_nr; 111 static char * hfp_ag_call_hold_services[6]; 112 113 static hfp_response_and_hold_state_t hfp_ag_response_and_hold_state; 114 static bool hfp_ag_response_and_hold_active = false; 115 116 // Subscriber information entries 117 static hfp_phone_number_t * hfp_ag_subscriber_numbers; 118 static int hfp_ag_subscriber_numbers_count; 119 120 // call state 121 static btstack_timer_source_t hfp_ag_ring_timeout; 122 123 // code 124 static int hfp_ag_get_ag_indicators_nr(hfp_connection_t * hfp_connection){ 125 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 126 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 127 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 128 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 129 } 130 return hfp_connection->ag_indicators_nr; 131 } 132 133 hfp_ag_indicator_t * hfp_ag_get_ag_indicators(hfp_connection_t * hfp_connection){ 134 // TODO: save only value, and value changed in the hfp_connection? 135 if (hfp_connection->ag_indicators_nr != hfp_ag_indicators_nr){ 136 hfp_connection->ag_indicators_nr = hfp_ag_indicators_nr; 137 (void)memcpy(hfp_connection->ag_indicators, hfp_ag_indicators, 138 hfp_ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 139 } 140 return (hfp_ag_indicator_t *)&(hfp_connection->ag_indicators); 141 } 142 143 static hfp_ag_indicator_t * get_ag_indicator_for_name(const char * name){ 144 int i; 145 for (i = 0; i < hfp_ag_indicators_nr; i++){ 146 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 147 return &hfp_ag_indicators[i]; 148 } 149 } 150 return NULL; 151 } 152 153 static int get_ag_indicator_index_for_name(const char * name){ 154 int i; 155 for (i = 0; i < hfp_ag_indicators_nr; i++){ 156 if (strcmp(hfp_ag_indicators[i].name, name) == 0){ 157 return i; 158 } 159 } 160 return -1; 161 } 162 163 static hfp_connection_t * get_hfp_ag_connection_context_for_acl_handle(uint16_t handle){ 164 btstack_linked_list_iterator_t it; 165 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 166 while (btstack_linked_list_iterator_has_next(&it)){ 167 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 168 if (hfp_connection->acl_handle != handle) continue; 169 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 170 return hfp_connection; 171 } 172 return NULL; 173 } 174 175 static int use_in_band_tone(void){ 176 return get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE); 177 } 178 179 static int has_codec_negotiation_feature(hfp_connection_t * hfp_connection){ 180 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_CODEC_NEGOTIATION); 181 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_CODEC_NEGOTIATION); 182 return hf && ag; 183 } 184 185 static int has_call_waiting_and_3way_calling_feature(hfp_connection_t * hfp_connection){ 186 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_THREE_WAY_CALLING); 187 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_THREE_WAY_CALLING); 188 return hf && ag; 189 } 190 191 static int has_hf_indicators_feature(hfp_connection_t * hfp_connection){ 192 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_HF_INDICATORS); 193 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_HF_INDICATORS); 194 return hf && ag; 195 } 196 197 /* unsolicited responses */ 198 199 static int hfp_ag_send_change_in_band_ring_tone_setting_cmd(uint16_t cid){ 200 char buffer[20]; 201 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", 202 HFP_CHANGE_IN_BAND_RING_TONE_SETTING, use_in_band_tone()); 203 buffer[sizeof(buffer) - 1] = 0; 204 return send_str_over_rfcomm(cid, buffer); 205 } 206 207 static int hfp_ag_exchange_supported_features_cmd(uint16_t cid){ 208 char buffer[40]; 209 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n\r\nOK\r\n", 210 HFP_SUPPORTED_FEATURES, hfp_ag_supported_features); 211 buffer[sizeof(buffer) - 1] = 0; 212 return send_str_over_rfcomm(cid, buffer); 213 } 214 215 static int hfp_ag_send_ok(uint16_t cid){ 216 char buffer[10]; 217 snprintf(buffer, sizeof(buffer), "\r\nOK\r\n"); 218 buffer[sizeof(buffer) - 1] = 0; 219 return send_str_over_rfcomm(cid, buffer); 220 } 221 222 static int hfp_ag_send_ring(uint16_t cid){ 223 return send_str_over_rfcomm(cid, (char *) "\r\nRING\r\n"); 224 } 225 226 static int hfp_ag_send_no_carrier(uint16_t cid){ 227 char buffer[15]; 228 snprintf(buffer, sizeof(buffer), "\r\nNO CARRIER\r\n"); 229 buffer[sizeof(buffer) - 1] = 0; 230 return send_str_over_rfcomm(cid, buffer); 231 } 232 233 static int hfp_ag_send_clip(uint16_t cid){ 234 char buffer[50]; 235 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", HFP_ENABLE_CLIP, 236 hfp_gsm_clip_number(), hfp_gsm_clip_type()); 237 buffer[sizeof(buffer) - 1] = 0; 238 return send_str_over_rfcomm(cid, buffer); 239 } 240 241 static int hfp_send_subscriber_number_cmd(uint16_t cid, uint8_t type, const char * number){ 242 char buffer[50]; 243 snprintf(buffer, sizeof(buffer), "\r\n%s: ,\"%s\",%u, , \r\n", 244 HFP_SUBSCRIBER_NUMBER_INFORMATION, number, type); 245 buffer[sizeof(buffer) - 1] = 0; 246 return send_str_over_rfcomm(cid, buffer); 247 } 248 249 static int hfp_ag_send_phone_number_for_voice_tag_cmd(uint16_t cid){ 250 char buffer[50]; 251 snprintf(buffer, sizeof(buffer), "\r\n%s: %s\r\n", 252 HFP_PHONE_NUMBER_FOR_VOICE_TAG, hfp_gsm_clip_number()); 253 buffer[sizeof(buffer) - 1] = 0; 254 return send_str_over_rfcomm(cid, buffer); 255 } 256 257 static int hfp_ag_send_call_waiting_notification(uint16_t cid){ 258 char buffer[50]; 259 snprintf(buffer, sizeof(buffer), "\r\n%s: \"%s\",%u\r\n", 260 HFP_ENABLE_CALL_WAITING_NOTIFICATION, hfp_gsm_clip_number(), 261 hfp_gsm_clip_type()); 262 buffer[sizeof(buffer) - 1] = 0; 263 return send_str_over_rfcomm(cid, buffer); 264 } 265 266 static int hfp_ag_send_error(uint16_t cid){ 267 char buffer[10]; 268 snprintf(buffer, sizeof(buffer), "\r\nERROR\r\n"); 269 buffer[sizeof(buffer) - 1] = 0; 270 return send_str_over_rfcomm(cid, buffer); 271 } 272 273 static int hfp_ag_send_report_extended_audio_gateway_error(uint16_t cid, uint8_t error){ 274 char buffer[20]; 275 snprintf(buffer, sizeof(buffer), "\r\n%s=%d\r\n", 276 HFP_EXTENDED_AUDIO_GATEWAY_ERROR, error); 277 buffer[sizeof(buffer) - 1] = 0; 278 return send_str_over_rfcomm(cid, buffer); 279 } 280 281 // get size for indicator string 282 static int hfp_ag_indicators_string_size(hfp_connection_t * hfp_connection, int i){ 283 // template: ("$NAME",($MIN,$MAX)) 284 return 8 + (int) strlen(hfp_ag_get_ag_indicators(hfp_connection)[i].name) 285 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range) 286 + string_len_for_uint32(hfp_ag_get_ag_indicators(hfp_connection)[i].min_range); 287 } 288 289 // store indicator 290 static void hfp_ag_indicators_string_store(hfp_connection_t * hfp_connection, int i, uint8_t * buffer, uint16_t buffer_size){ 291 snprintf((char *)buffer, buffer_size, "(\"%s\",(%d,%d)),", 292 hfp_ag_get_ag_indicators(hfp_connection)[i].name, 293 hfp_ag_get_ag_indicators(hfp_connection)[i].min_range, 294 hfp_ag_get_ag_indicators(hfp_connection)[i].max_range); 295 ((char *)buffer)[buffer_size - 1] = 0; 296 } 297 298 // structure: header [indicator [comma indicator]] footer 299 static int hfp_ag_indicators_cmd_generator_num_segments(hfp_connection_t * hfp_connection){ 300 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 301 if (!num_indicators) return 2; 302 return 3 + ((num_indicators-1) * 2); 303 } 304 305 // get size of individual segment for hfp_ag_retrieve_indicators_cmd 306 static int hfp_ag_indicators_cmd_generator_get_segment_len(hfp_connection_t * hfp_connection, int index){ 307 if (index == 0) { 308 return strlen(HFP_INDICATOR) + 3; // "\n\r%s:"" 309 } 310 index--; 311 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 312 int indicator_index = index >> 1; 313 if ((index & 1) == 0){ 314 return hfp_ag_indicators_string_size(hfp_connection, indicator_index); 315 } 316 if (indicator_index == (num_indicators - 1)){ 317 return 8; // "\r\n\r\nOK\r\n" 318 } 319 return 1; // comma 320 } 321 322 static void hfp_ag_indicators_cmd_generator_store_segment(hfp_connection_t * hfp_connection, int index, uint8_t * buffer, uint16_t buffer_size){ 323 if (index == 0){ 324 *buffer++ = '\r'; 325 *buffer++ = '\n'; 326 int len = strlen(HFP_INDICATOR); 327 (void)memcpy(buffer, HFP_INDICATOR, len); 328 buffer += len; 329 *buffer++ = ':'; 330 return; 331 } 332 index--; 333 int num_indicators = hfp_ag_get_ag_indicators_nr(hfp_connection); 334 int indicator_index = index >> 1; 335 if ((index & 1) == 0){ 336 hfp_ag_indicators_string_store(hfp_connection, indicator_index, buffer, buffer_size); 337 return; 338 } 339 if (indicator_index == (num_indicators-1)){ 340 (void)memcpy(buffer, "\r\n\r\nOK\r\n", 8); 341 return; 342 } 343 *buffer = ','; 344 } 345 346 static int hfp_ag_generic_indicators_join(char * buffer, int buffer_size){ 347 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 348 int i; 349 int offset = 0; 350 for (i = 0; i < (hfp_ag_generic_status_indicators_nr - 1); i++) { 351 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_generic_status_indicators[i].uuid); 352 } 353 if (i < hfp_ag_generic_status_indicators_nr){ 354 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_generic_status_indicators[i].uuid); 355 } 356 return offset; 357 } 358 359 static int hfp_ag_generic_indicators_initial_status_join(char * buffer, int buffer_size){ 360 if (buffer_size < (hfp_ag_generic_status_indicators_nr * 3)) return 0; 361 int i; 362 int offset = 0; 363 for (i = 0; i < hfp_ag_generic_status_indicators_nr; i++) { 364 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); 365 } 366 return offset; 367 } 368 369 static int hfp_ag_indicators_status_join(char * buffer, int buffer_size){ 370 if (buffer_size < (hfp_ag_indicators_nr * 3)) return 0; 371 int i; 372 int offset = 0; 373 for (i = 0; i < (hfp_ag_indicators_nr-1); i++) { 374 offset += snprintf(buffer+offset, buffer_size-offset, "%d,", hfp_ag_indicators[i].status); 375 } 376 if (i<hfp_ag_indicators_nr){ 377 offset += snprintf(buffer+offset, buffer_size-offset, "%d", hfp_ag_indicators[i].status); 378 } 379 return offset; 380 } 381 382 static int hfp_ag_call_services_join(char * buffer, int buffer_size){ 383 if (buffer_size < (hfp_ag_call_hold_services_nr * 3)) return 0; 384 int i; 385 int offset = snprintf(buffer, buffer_size, "("); 386 for (i = 0; i < (hfp_ag_call_hold_services_nr-1); i++) { 387 offset += snprintf(buffer+offset, buffer_size-offset, "%s,", hfp_ag_call_hold_services[i]); 388 } 389 if (i<hfp_ag_call_hold_services_nr){ 390 offset += snprintf(buffer+offset, buffer_size-offset, "%s)", hfp_ag_call_hold_services[i]); 391 } 392 return offset; 393 } 394 395 static int hfp_ag_send_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, 396 int start_segment, int num_segments, 397 int (*get_segment_len)(hfp_connection_t * hfp_connection, int segment), 398 void (*store_segment) (hfp_connection_t * hfp_connection, int segment, uint8_t * buffer, uint16_t buffer_size)){ 399 400 // assumes: can send now == true 401 // assumes: num segments > 0 402 // assumes: individual segments are smaller than MTU 403 rfcomm_reserve_packet_buffer(); 404 int mtu = rfcomm_get_max_frame_size(cid); 405 uint8_t * data = rfcomm_get_outgoing_buffer(); 406 int offset = 0; 407 int segment = start_segment; 408 while (segment < num_segments){ 409 int segment_len = get_segment_len(hfp_connection, segment); 410 if ((offset + segment_len + 1) > mtu) break; 411 // append segment. As it appends a '\0', we provide a buffer one byte larger 412 store_segment(hfp_connection, segment, data+offset, segment_len + 1); 413 offset += segment_len; 414 segment++; 415 } 416 rfcomm_send_prepared(cid, offset); 417 #ifdef ENABLE_HFP_AT_MESSAGES 418 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_SENT, (char *) data); 419 #endif 420 return segment; 421 } 422 423 // returns next segment to store 424 static int hfp_ag_send_retrieve_indicators_cmd_via_generator(uint16_t cid, hfp_connection_t * hfp_connection, int start_segment){ 425 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 426 return hfp_ag_send_cmd_via_generator(cid, hfp_connection, start_segment, num_segments, 427 hfp_ag_indicators_cmd_generator_get_segment_len, 428 hfp_ag_indicators_cmd_generator_store_segment); 429 } 430 431 static int hfp_ag_send_retrieve_indicators_status_cmd(uint16_t cid){ 432 char buffer[40]; 433 const int size = sizeof(buffer); 434 int offset = snprintf(buffer, size, "\r\n%s:", HFP_INDICATOR); 435 offset += hfp_ag_indicators_status_join(buffer+offset, size-offset-9); 436 offset += snprintf(buffer+offset, size-offset, "\r\n\r\nOK\r\n"); 437 return send_str_over_rfcomm(cid, buffer); 438 } 439 440 static int hfp_ag_send_retrieve_can_hold_call_cmd(uint16_t cid){ 441 char buffer[40]; 442 const int size = sizeof(buffer); 443 int offset = snprintf(buffer, size, "\r\n%s:", HFP_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES); 444 offset += hfp_ag_call_services_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 } 448 449 450 static int hfp_ag_send_list_supported_generic_status_indicators_cmd(uint16_t cid){ 451 return hfp_ag_send_ok(cid); 452 } 453 454 static int hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(uint16_t cid){ 455 char buffer[40]; 456 const int size = sizeof(buffer); 457 int offset = snprintf(buffer, size, "\r\n%s:(", HFP_GENERIC_STATUS_INDICATOR); 458 offset += hfp_ag_generic_indicators_join(buffer + offset, size - offset - 10); 459 offset += snprintf(buffer+offset, size-offset, ")\r\n\r\nOK\r\n"); 460 return send_str_over_rfcomm(cid, buffer); 461 } 462 463 static int hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(uint16_t cid){ 464 char buffer[40]; 465 int offset = hfp_ag_generic_indicators_initial_status_join(buffer, sizeof(buffer) - 7); 466 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\nOK\r\n"); 467 return send_str_over_rfcomm(cid, buffer); 468 } 469 470 static int hfp_ag_send_transfer_ag_indicators_status_cmd(uint16_t cid, hfp_ag_indicator_t * indicator){ 471 char buffer[20]; 472 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d\r\n", 473 HFP_TRANSFER_AG_INDICATOR_STATUS, indicator->index, 474 indicator->status); 475 buffer[sizeof(buffer) - 1] = 0; 476 return send_str_over_rfcomm(cid, buffer); 477 } 478 479 static int hfp_ag_send_report_network_operator_name_cmd(uint16_t cid, hfp_network_opearator_t op){ 480 char buffer[41]; 481 if (strlen(op.name) == 0){ 482 snprintf(buffer, sizeof(buffer), "\r\n%s:%d,,\r\n\r\nOK\r\n", HFP_QUERY_OPERATOR_SELECTION, op.mode); 483 } else { 484 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s:%d,%d,", HFP_QUERY_OPERATOR_SELECTION, op.mode, op.format); 485 offset += snprintf(buffer+offset, 16, "%s", op.name); 486 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n\r\nOK\r\n"); 487 } 488 return send_str_over_rfcomm(cid, buffer); 489 } 490 491 static inline int hfp_ag_send_cmd_with_space_and_int(uint16_t cid, const char * cmd, uint8_t value){ 492 char buffer[30]; 493 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", cmd, value); 494 return send_str_over_rfcomm(cid, buffer); 495 } 496 497 498 static inline int hfp_ag_send_cmd_with_int(uint16_t cid, const char * cmd, uint8_t value){ 499 char buffer[30]; 500 snprintf(buffer, sizeof(buffer), "\r\n%s:%d\r\n", cmd, value); 501 return send_str_over_rfcomm(cid, buffer); 502 } 503 504 static int hfp_ag_send_suggest_codec_cmd(uint16_t cid, uint8_t codec){ 505 return hfp_ag_send_cmd_with_int(cid, HFP_CONFIRM_COMMON_CODEC, codec); 506 } 507 508 static int hfp_ag_send_set_speaker_gain_cmd(uint16_t cid, uint8_t gain){ 509 return hfp_ag_send_cmd_with_int(cid, HFP_SET_SPEAKER_GAIN, gain); 510 } 511 512 static int hfp_ag_send_set_microphone_gain_cmd(uint16_t cid, uint8_t gain){ 513 return hfp_ag_send_cmd_with_int(cid, HFP_SET_MICROPHONE_GAIN, gain); 514 } 515 516 static int hfp_ag_send_set_response_and_hold(uint16_t cid, int state){ 517 return hfp_ag_send_cmd_with_space_and_int(cid, HFP_RESPONSE_AND_HOLD, state); 518 } 519 520 static int hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection_t * hfp_connection){ 521 char buffer[30]; 522 uint8_t evra_enabled = hfp_connection->enhanced_voice_recognition_enabled ? 1 : 0; 523 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, evra_enabled, hfp_connection->ag_vra_state); 524 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 525 } 526 527 static int hfp_ag_send_voice_recognition_cmd(hfp_connection_t * hfp_connection, uint8_t activate_voice_recognition){ 528 char buffer[30]; 529 if (hfp_connection->enhanced_voice_recognition_enabled){ 530 snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition, hfp_connection->ag_vra_state); 531 } else { 532 snprintf(buffer, sizeof(buffer), "\r\n%s: %d\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, activate_voice_recognition); 533 } 534 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 535 } 536 537 static int hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection_t * hfp_connection){ 538 char buffer[HFP_VR_TEXT_HEADER_SIZE + HFP_MAX_VR_TEXT_SIZE]; 539 snprintf(buffer, sizeof(buffer), "\r\n%s: 1,%d,%X,%d,%d,\"%s\"\r\n", HFP_ACTIVATE_VOICE_RECOGNITION, 540 hfp_connection->ag_vra_state, 541 hfp_connection->ag_msg.text_id, 542 hfp_connection->ag_msg.text_type, 543 hfp_connection->ag_msg.text_operation, 544 hfp_connection->ag_msg.text); 545 return send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 546 } 547 548 static uint8_t hfp_ag_suggest_codec(hfp_connection_t *hfp_connection){ 549 if (hfp_connection->sco_for_msbc_failed) return HFP_CODEC_CVSD; 550 551 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_ag_codecs_nr, hfp_ag_codecs)){ 552 if (hfp_supports_codec(HFP_CODEC_MSBC, hfp_connection->remote_codecs_nr, hfp_connection->remote_codecs)){ 553 return HFP_CODEC_MSBC; 554 } 555 } 556 return HFP_CODEC_CVSD; 557 } 558 559 /* state machines */ 560 561 static uint8_t hfp_ag_esco_s4_supported(hfp_connection_t * hfp_connection){ 562 return (hfp_connection->remote_supported_features & (1<<HFP_HFSF_ESCO_S4)) && (hfp_ag_supported_features & (1 << HFP_AGSF_ESCO_S4)); 563 } 564 565 static int codecs_exchange_state_machine(hfp_connection_t * hfp_connection){ 566 /* events ( == commands): 567 HFP_CMD_AVAILABLE_CODECS == received AT+BAC with list of codecs 568 HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 569 hf_trigger_codec_connection_setup == received BCC 570 ag_trigger_codec_connection_setup == received from AG to send BCS 571 HFP_CMD_HF_CONFIRMED_CODEC == received AT+BCS 572 */ 573 switch (hfp_connection->codecs_state){ 574 case HFP_CODECS_EXCHANGED: 575 if (hfp_connection->command == HFP_CMD_AVAILABLE_CODECS){ 576 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 577 return 1; 578 } 579 break; 580 581 case HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE: 582 case HFP_CODECS_AG_RESEND_COMMON_CODEC: 583 hfp_connection->ag_send_common_codec = true; 584 break; 585 default: 586 break; 587 } 588 589 if (hfp_connection->ag_send_common_codec){ 590 hfp_connection->ag_send_common_codec = false; 591 hfp_connection->codecs_state = HFP_CODECS_AG_SENT_COMMON_CODEC; 592 hfp_connection->suggested_codec = hfp_ag_suggest_codec(hfp_connection); 593 hfp_ag_send_suggest_codec_cmd(hfp_connection->rfcomm_cid, hfp_connection->suggested_codec); 594 return 1; 595 } 596 597 switch (hfp_connection->command){ 598 case HFP_CMD_AVAILABLE_CODECS: 599 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED){ 600 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_LIST; 601 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 602 return 1; 603 } 604 605 switch (hfp_connection->codecs_state){ 606 case HFP_CODECS_AG_SENT_COMMON_CODEC: 607 hfp_connection->codecs_state = HFP_CODECS_AG_RESEND_COMMON_CODEC; 608 break; 609 default: 610 break; 611 } 612 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 613 return 1; 614 615 case HFP_CMD_TRIGGER_CODEC_CONNECTION_SETUP: 616 hfp_connection->codecs_state = HFP_CODECS_RECEIVED_TRIGGER_CODEC_EXCHANGE; 617 hfp_connection->establish_audio_connection = 1; 618 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 619 return 1; 620 621 case HFP_CMD_HF_CONFIRMED_CODEC: 622 if (hfp_connection->codec_confirmed != hfp_connection->suggested_codec){ 623 hfp_connection->codecs_state = HFP_CODECS_ERROR; 624 hfp_ag_send_error(hfp_connection->rfcomm_cid); 625 return 1; 626 } 627 hfp_connection->negotiated_codec = hfp_connection->codec_confirmed; 628 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 629 log_info("hfp: codec confirmed: %s", (hfp_connection->negotiated_codec == HFP_CODEC_MSBC) ? "mSBC" : "CVSD"); 630 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 631 // now, pick link settings 632 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 633 #ifdef ENABLE_CC256X_ASSISTED_HFP 634 hfp_cc256x_prepare_for_sco(hfp_connection); 635 #endif 636 return 1; 637 default: 638 break; 639 } 640 return 0; 641 } 642 643 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 644 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 645 hfp_emit_slc_connection_event(hfp_connection, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 646 647 // if active call exist, set per-hfp_connection state active, too (when audio is on) 648 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 649 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 650 } 651 // if AG is ringing, also start ringing on the HF 652 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 653 switch (hfp_gsm_callsetup_status()){ 654 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 655 hfp_ag_hf_start_ringing_incoming(hfp_connection); 656 break; 657 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 658 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 659 break; 660 default: 661 break; 662 } 663 } 664 } 665 666 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 667 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 668 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 669 int sent = 0; 670 switch(hfp_connection->command){ 671 case HFP_CMD_SUPPORTED_FEATURES: 672 switch(hfp_connection->state){ 673 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 674 case HFP_EXCHANGE_SUPPORTED_FEATURES: 675 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 676 if (has_codec_negotiation_feature(hfp_connection)){ 677 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 678 } else { 679 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 680 } 681 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 682 return 1; 683 default: 684 break; 685 } 686 break; 687 case HFP_CMD_AVAILABLE_CODECS: 688 sent = codecs_exchange_state_machine(hfp_connection); 689 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 690 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 691 } 692 return sent; 693 694 case HFP_CMD_RETRIEVE_AG_INDICATORS: 695 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 696 // HF requested AG Indicators and we did expect it 697 hfp_connection->send_ag_indicators_segment = 0; 698 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 699 // continue below in state switch 700 } 701 break; 702 703 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 704 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 705 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 706 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 707 return 1; 708 709 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 710 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 711 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 712 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 713 } else if (has_hf_indicators_feature(hfp_connection)){ 714 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 715 } else { 716 hfp_ag_slc_established(hfp_connection); 717 } 718 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 719 return 1; 720 721 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 722 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 723 if (has_hf_indicators_feature(hfp_connection)){ 724 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 725 } 726 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 727 if (!has_hf_indicators_feature(hfp_connection)){ 728 hfp_ag_slc_established(hfp_connection); 729 } 730 return 1; 731 732 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 733 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 734 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 735 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 736 return 1; 737 738 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 739 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 740 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 741 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 742 return 1; 743 744 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 745 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 746 hfp_ag_slc_established(hfp_connection); 747 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 748 return 1; 749 default: 750 break; 751 } 752 753 switch (hfp_connection->state){ 754 case HFP_RETRIEVE_INDICATORS: { 755 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 756 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 757 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 758 if (next_segment < num_segments){ 759 // prepare sending of next segment 760 hfp_connection->send_ag_indicators_segment = next_segment; 761 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 762 } else { 763 // done, go to next state 764 hfp_connection->send_ag_indicators_segment = 0; 765 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 766 } 767 return 1; 768 } 769 default: 770 break; 771 } 772 return 0; 773 } 774 775 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 776 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 777 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 778 return hf && ag; 779 } 780 781 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 782 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 783 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 784 return hf && ag; 785 } 786 787 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 788 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 789 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 790 return hf && ag; 791 } 792 793 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 794 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 795 return false; 796 } 797 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 798 return false; 799 } 800 if (hfp_connection->ag_vra_send_command){ 801 return false; 802 } 803 return true; 804 } 805 806 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 807 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 808 return false; 809 } 810 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 811 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 812 return true; 813 } 814 return false; 815 } 816 return true; 817 } 818 819 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 820 switch (hfp_connection->state){ 821 case HFP_W2_CONNECT_SCO: 822 case HFP_W4_SCO_CONNECTED: 823 case HFP_AUDIO_CONNECTION_ESTABLISHED: 824 return true; 825 default: 826 return false; 827 } 828 } 829 830 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 831 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 832 833 uint8_t event[6]; 834 event[0] = HCI_EVENT_HFP_META; 835 event[1] = sizeof(event) - 2; 836 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 837 little_endian_store_16(event, 3, acl_handle); 838 event[5] = status; 839 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 840 } 841 842 843 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 844 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 845 846 uint8_t event[8]; 847 event[0] = HCI_EVENT_HFP_META; 848 event[1] = sizeof(event) - 2; 849 event[2] = HFP_SUBEVENT_HF_INDICATOR; 850 little_endian_store_16(event, 3, acl_handle); 851 little_endian_store_16(event, 5, uuid); 852 event[7] = value; 853 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 854 } 855 856 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 857 if (!hfp_ag_callback) return; 858 859 uint8_t event[5]; 860 event[0] = HCI_EVENT_HFP_META; 861 event[1] = sizeof(event) - 2; 862 event[2] = event_subtype; 863 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 864 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 865 } 866 867 // @return status 868 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 869 uint8_t status = ERROR_CODE_SUCCESS; 870 switch (hfp_connection->vra_state_requested){ 871 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 872 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 873 status = hfp_ag_setup_audio_connection(hfp_connection); 874 if (status != ERROR_CODE_SUCCESS){ 875 hfp_connection->vra_state_requested = hfp_connection->vra_state; 876 hfp_emit_voice_recognition_enabled(hfp_connection, status); 877 break; 878 } 879 } 880 hfp_connection->enhanced_voice_recognition_enabled = true; 881 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 882 hfp_connection->vra_state_requested = hfp_connection->vra_state; 883 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 884 break; 885 886 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 887 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 888 hfp_connection->vra_state_requested = hfp_connection->vra_state; 889 890 // release audio connection only if it was opened after audio VR activated 891 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 892 hfp_trigger_release_audio_connection(hfp_connection); 893 } 894 895 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 896 break; 897 898 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 899 // open only if audio connection does not already exist 900 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 901 status = hfp_ag_setup_audio_connection(hfp_connection); 902 if (status != ERROR_CODE_SUCCESS){ 903 hfp_connection->vra_state_requested = hfp_connection->vra_state; 904 hfp_emit_voice_recognition_enabled(hfp_connection, status); 905 break; 906 } 907 } 908 909 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 910 hfp_connection->vra_state_requested = hfp_connection->vra_state; 911 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 912 913 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 914 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 915 } else { 916 hfp_connection->emit_vra_enabled_after_audio_established = true; 917 } 918 break; 919 920 default: 921 break; 922 } 923 return status; 924 } 925 926 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 927 uint8_t done = 0; 928 uint8_t status; 929 930 switch (hfp_connection->vra_state_requested){ 931 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 932 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 933 if (done == 0){ 934 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 935 } else { 936 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 937 } 938 hfp_connection->vra_state_requested = hfp_connection->vra_state; 939 return done; 940 941 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 942 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 943 if (done == 0){ 944 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 945 } else { 946 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 947 } 948 hfp_connection->vra_state_requested = hfp_connection->vra_state; 949 return done; 950 951 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 952 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 953 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 954 if (done == 0){ 955 hfp_connection->vra_state_requested = hfp_connection->vra_state; 956 957 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 958 hfp_emit_voice_recognition_enabled(hfp_connection, done); 959 } else { 960 hfp_emit_voice_recognition_disabled(hfp_connection, done); 961 } 962 return 0; 963 } 964 status = hfp_ag_vra_state_machine_two(hfp_connection); 965 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 966 967 default: 968 log_error("state %u", hfp_connection->vra_state_requested); 969 btstack_assert(false); 970 return 0; 971 } 972 } 973 974 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 975 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 976 return 0; 977 } 978 int done = 0; 979 uint8_t status; 980 981 // VRA action initiated by AG 982 if (hfp_connection->ag_vra_send_command){ 983 hfp_connection->ag_vra_send_command = false; 984 return hfp_ag_vra_send_command(hfp_connection); 985 } 986 987 if (hfp_connection->ag_vra_requested_by_hf){ 988 hfp_connection->ag_vra_requested_by_hf = false; 989 990 // HF initiatied voice recognition, parser extracted activation value 991 switch (hfp_connection->ag_activate_voice_recognition_value){ 992 case 0: 993 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 994 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 995 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 996 } 997 break; 998 999 case 1: 1000 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1001 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1002 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1003 } 1004 break; 1005 1006 case 2: 1007 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1008 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1009 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1010 } 1011 break; 1012 default: 1013 break; 1014 } 1015 if (done == 0){ 1016 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1017 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1018 return 1; 1019 } 1020 1021 status = hfp_ag_vra_state_machine_two(hfp_connection); 1022 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1023 } 1024 1025 return 0; 1026 } 1027 1028 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1029 int sent = codecs_exchange_state_machine(hfp_connection); 1030 if (sent) return 1; 1031 1032 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1033 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1034 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1035 return 1; 1036 } 1037 1038 switch(hfp_connection->command){ 1039 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1040 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1041 return 1; 1042 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1043 if (hfp_connection->network_operator.format != 0){ 1044 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1045 } else { 1046 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1047 } 1048 return 1; 1049 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1050 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1051 return 1; 1052 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1053 if (hfp_connection->extended_audio_gateway_error){ 1054 hfp_connection->extended_audio_gateway_error = 0; 1055 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1056 return 1; 1057 } 1058 break; 1059 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1060 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1061 return 1; 1062 default: 1063 break; 1064 } 1065 return 0; 1066 } 1067 1068 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1069 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1070 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1071 1072 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1073 1074 if (hfp_connection->release_audio_connection){ 1075 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1076 hfp_connection->release_audio_connection = 0; 1077 gap_disconnect(hfp_connection->sco_handle); 1078 return 1; 1079 } 1080 1081 // accept incoming audio connection (codec negotiation is not used) 1082 if (hfp_connection->accept_sco){ 1083 // notify about codec selection if not done already 1084 if (hfp_connection->negotiated_codec == 0){ 1085 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1086 } 1087 // 1088 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1089 hfp_connection->accept_sco = 0; 1090 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1091 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1092 return 1; 1093 } 1094 1095 // run codecs exchange 1096 int sent = codecs_exchange_state_machine(hfp_connection); 1097 if (sent) return 1; 1098 1099 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1100 if (hfp_connection->establish_audio_connection){ 1101 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1102 hfp_connection->establish_audio_connection = 0; 1103 hfp_setup_synchronous_connection(hfp_connection); 1104 return 1; 1105 } 1106 return 0; 1107 } 1108 1109 static void hfp_ag_set_callsetup_indicator(void){ 1110 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1111 if (!indicator){ 1112 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1113 return; 1114 }; 1115 indicator->status = hfp_gsm_callsetup_status(); 1116 } 1117 1118 static void hfp_ag_set_callheld_indicator(void){ 1119 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1120 if (!indicator){ 1121 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1122 return; 1123 }; 1124 indicator->status = hfp_gsm_callheld_status(); 1125 } 1126 1127 // 1128 // transition implementations for hfp_ag_call_state_machine 1129 // 1130 1131 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1132 if (use_in_band_tone()){ 1133 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1134 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1135 } else { 1136 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1137 } 1138 } 1139 1140 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1141 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1142 } 1143 1144 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1145 hfp_connection->ag_ring = 0; 1146 hfp_connection->ag_send_clip = 0; 1147 } 1148 1149 1150 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1151 btstack_linked_list_iterator_t it; 1152 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1153 while (btstack_linked_list_iterator_has_next(&it)){ 1154 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1155 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1156 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1157 1158 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1159 hfp_ag_run_for_context(hfp_connection); 1160 } 1161 } 1162 1163 static void hfp_ag_trigger_ring_and_clip(void) { 1164 btstack_linked_list_iterator_t it; 1165 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1166 while (btstack_linked_list_iterator_has_next(&it)){ 1167 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1168 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1169 switch (hfp_connection->call_state){ 1170 case HFP_CALL_INCOMING_RINGING: 1171 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1172 case HFP_CALL_OUTGOING_RINGING: 1173 // Queue RING on this connection 1174 hfp_connection->ag_ring = 1; 1175 1176 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1177 // "If the calling subscriber number information is available from the network, the AG shall issue the 1178 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1179 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1180 1181 // trigger next message 1182 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1183 break; 1184 default: 1185 break; 1186 } 1187 } 1188 } 1189 1190 // trigger RING and CLIP messages on connections that are ringing 1191 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1192 hfp_ag_trigger_ring_and_clip(); 1193 1194 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1195 btstack_run_loop_add_timer(timer); 1196 } 1197 1198 static void hfp_ag_ring_timeout_stop(void){ 1199 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1200 } 1201 1202 static void hfp_ag_start_ringing(void){ 1203 // setup ring timer 1204 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1205 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1206 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1207 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1208 1209 // emit start ringing 1210 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1211 1212 // send initial RING + CLIP 1213 hfp_ag_trigger_ring_and_clip(); 1214 } 1215 1216 static void hfp_ag_stop_ringing(void){ 1217 hfp_ag_ring_timeout_stop(); 1218 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1219 1220 btstack_linked_list_iterator_t it; 1221 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1222 while (btstack_linked_list_iterator_has_next(&it)){ 1223 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1224 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1225 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1226 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1227 hfp_ag_hf_stop_ringing(hfp_connection); 1228 } 1229 } 1230 1231 static void hfp_ag_trigger_incoming_call_idle(void){ 1232 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1233 if (indicator_index < 0) return; 1234 1235 // update callsetup state in connections 1236 btstack_linked_list_iterator_t it; 1237 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1238 while (btstack_linked_list_iterator_has_next(&it)){ 1239 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1240 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1241 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1242 1243 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1244 1245 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1246 1247 hfp_ag_run_for_context(hfp_connection); 1248 } 1249 1250 // start local ringing - started after connection state has been updated 1251 hfp_ag_start_ringing(); 1252 } 1253 1254 static void hfp_ag_trigger_outgoing_call(void){ 1255 btstack_linked_list_iterator_t it; 1256 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1257 while (btstack_linked_list_iterator_has_next(&it)){ 1258 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1259 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1260 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1261 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1262 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1263 } 1264 } 1265 } 1266 1267 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1268 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1269 1270 // trigger callsetup to be 1271 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1272 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1273 1274 int indicator_index ; 1275 1276 hfp_ag_set_callsetup_indicator(); 1277 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1278 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1279 1280 // put current call on hold if active 1281 if (put_call_on_hold){ 1282 log_info("AG putting current call on hold for new outgoing call"); 1283 hfp_ag_set_callheld_indicator(); 1284 indicator_index = get_ag_indicator_index_for_name("callheld"); 1285 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1286 } 1287 1288 // start audio if needed 1289 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1290 } 1291 1292 static void hfp_ag_transfer_indicator(const char * name){ 1293 int indicator_index = get_ag_indicator_index_for_name(name); 1294 if (indicator_index < 0) return; 1295 1296 btstack_linked_list_iterator_t it; 1297 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1298 while (btstack_linked_list_iterator_has_next(&it)){ 1299 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1300 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1301 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1302 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1303 hfp_ag_run_for_context(hfp_connection); 1304 } 1305 } 1306 1307 static void hfp_ag_transfer_callsetup_state(void){ 1308 hfp_ag_transfer_indicator("callsetup"); 1309 } 1310 1311 static void hfp_ag_transfer_call_state(void){ 1312 hfp_ag_transfer_indicator("call"); 1313 } 1314 1315 static void hfp_ag_transfer_callheld_state(void){ 1316 hfp_ag_transfer_indicator("callheld"); 1317 } 1318 1319 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1320 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1321 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1322 1323 hfp_ag_stop_ringing(); 1324 1325 btstack_linked_list_iterator_t it; 1326 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1327 while (btstack_linked_list_iterator_has_next(&it)){ 1328 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1329 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1330 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1331 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1332 1333 if (hfp_connection == source){ 1334 1335 if (use_in_band_tone()){ 1336 hfp_connection->call_state = HFP_CALL_ACTIVE; 1337 } else { 1338 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1339 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1340 } 1341 1342 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1343 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1344 1345 } else { 1346 hfp_connection->call_state = HFP_CALL_IDLE; 1347 } 1348 hfp_ag_run_for_context(hfp_connection); 1349 } 1350 } 1351 1352 static void hfp_ag_ag_accept_call(void){ 1353 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1354 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1355 1356 hfp_ag_stop_ringing(); 1357 1358 btstack_linked_list_iterator_t it; 1359 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1360 while (btstack_linked_list_iterator_has_next(&it)){ 1361 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1362 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1363 if (hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) continue; 1364 1365 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1366 1367 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1368 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1369 1370 hfp_ag_run_for_context(hfp_connection); 1371 break; // only single 1372 } 1373 } 1374 1375 static void hfp_ag_trigger_reject_call(void){ 1376 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1377 1378 hfp_ag_stop_ringing(); 1379 1380 btstack_linked_list_iterator_t it; 1381 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1382 while (btstack_linked_list_iterator_has_next(&it)){ 1383 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1384 if (connection->local_role != HFP_ROLE_AG) continue; 1385 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1386 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1387 1388 connection->call_state = HFP_CALL_IDLE; 1389 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1390 1391 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1392 connection->release_audio_connection = 1; 1393 } 1394 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1395 hfp_ag_run_for_context(connection); 1396 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1397 } 1398 } 1399 1400 static void hfp_ag_trigger_terminate_call(void){ 1401 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1402 1403 // no ringing during call 1404 1405 btstack_linked_list_iterator_t it; 1406 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1407 while (btstack_linked_list_iterator_has_next(&it)){ 1408 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1409 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1410 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1411 1412 hfp_connection->call_state = HFP_CALL_IDLE; 1413 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1414 1415 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1416 hfp_connection->release_audio_connection = 1; 1417 } 1418 1419 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1420 hfp_ag_run_for_context(hfp_connection); 1421 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1422 } 1423 } 1424 1425 static void hfp_ag_set_call_indicator(void){ 1426 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1427 if (!indicator){ 1428 log_error("hfp_ag_set_call_state: call indicator is missing"); 1429 return; 1430 }; 1431 indicator->status = hfp_gsm_call_status(); 1432 } 1433 1434 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1435 btstack_linked_list_iterator_t it; 1436 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1437 while (btstack_linked_list_iterator_has_next(&it)){ 1438 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1439 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1440 if (hfp_connection->call_state == call_state) return hfp_connection; 1441 } 1442 return NULL; 1443 } 1444 1445 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1446 btstack_linked_list_iterator_t it; 1447 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1448 while (btstack_linked_list_iterator_has_next(&it)){ 1449 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1450 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1451 hfp_connection->send_response_and_hold_status = state + 1; 1452 } 1453 } 1454 1455 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1456 int indicator_index; 1457 switch (hfp_connection->call_state){ 1458 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1459 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1460 1461 // we got event: audio hfp_connection established 1462 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1463 break; 1464 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1465 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1466 // we got event: audio hfp_connection established 1467 hfp_connection->call_state = HFP_CALL_ACTIVE; 1468 break; 1469 case HFP_CALL_W2_SEND_CALL_WAITING: 1470 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1471 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1472 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1473 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1474 break; 1475 default: 1476 break; 1477 } 1478 return 0; 1479 } 1480 1481 // functions extracted from hfp_ag_call_sm below 1482 static void hfp_ag_handle_reject_outgoing_call(void){ 1483 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1484 if (!hfp_connection){ 1485 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1486 return; 1487 } 1488 1489 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1490 hfp_connection->call_state = HFP_CALL_IDLE; 1491 hfp_connection->send_error = 1; 1492 hfp_ag_run_for_context(hfp_connection); 1493 } 1494 1495 // hfp_connection is used to identify originating HF 1496 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1497 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1498 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1499 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1500 1501 switch (event){ 1502 case HFP_AG_INCOMING_CALL: 1503 switch (hfp_gsm_call_status()){ 1504 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1505 switch (hfp_gsm_callsetup_status()){ 1506 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1507 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1508 hfp_ag_set_callsetup_indicator(); 1509 hfp_ag_trigger_incoming_call_idle(); 1510 log_info("AG rings"); 1511 break; 1512 default: 1513 break; 1514 } 1515 break; 1516 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1517 switch (hfp_gsm_callsetup_status()){ 1518 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1519 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1520 hfp_ag_set_callsetup_indicator(); 1521 hfp_ag_trigger_incoming_call_during_active_one(); 1522 log_info("AG call waiting"); 1523 break; 1524 default: 1525 break; 1526 } 1527 break; 1528 default: 1529 break; 1530 } 1531 break; 1532 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1533 switch (hfp_gsm_call_status()){ 1534 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1535 switch (hfp_gsm_callsetup_status()){ 1536 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1537 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1538 hfp_ag_set_call_indicator(); 1539 hfp_ag_set_callsetup_indicator(); 1540 hfp_ag_ag_accept_call(); 1541 log_info("AG answers call, accept call by GSM"); 1542 break; 1543 default: 1544 break; 1545 } 1546 break; 1547 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1548 switch (hfp_gsm_callsetup_status()){ 1549 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1550 log_info("AG: current call is placed on hold, incoming call gets active"); 1551 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1552 hfp_ag_set_callsetup_indicator(); 1553 hfp_ag_set_callheld_indicator(); 1554 hfp_ag_transfer_callsetup_state(); 1555 hfp_ag_transfer_callheld_state(); 1556 break; 1557 default: 1558 break; 1559 } 1560 break; 1561 default: 1562 break; 1563 } 1564 break; 1565 1566 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1567 switch (hfp_gsm_call_status()){ 1568 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1569 switch (hfp_gsm_callheld_status()){ 1570 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1571 log_info("AG: joining held call with active call"); 1572 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1573 hfp_ag_set_callheld_indicator(); 1574 hfp_ag_transfer_callheld_state(); 1575 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1576 break; 1577 default: 1578 break; 1579 } 1580 break; 1581 default: 1582 break; 1583 } 1584 break; 1585 1586 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1587 switch (hfp_gsm_call_status()){ 1588 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1589 switch (hfp_gsm_callsetup_status()){ 1590 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1591 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1592 hfp_ag_set_callsetup_indicator(); 1593 hfp_ag_set_call_indicator(); 1594 hfp_ag_hf_accept_call(hfp_connection); 1595 hfp_connection->ok_pending = 1; 1596 log_info("HF answers call, accept call by GSM"); 1597 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1598 break; 1599 default: 1600 break; 1601 } 1602 break; 1603 default: 1604 break; 1605 } 1606 break; 1607 1608 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1609 switch (hfp_gsm_call_status()){ 1610 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1611 switch (hfp_gsm_callsetup_status()){ 1612 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1613 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1614 hfp_ag_response_and_hold_active = true; 1615 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1616 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1617 // as with regular call 1618 hfp_ag_set_call_indicator(); 1619 hfp_ag_set_callsetup_indicator(); 1620 hfp_ag_ag_accept_call(); 1621 log_info("AG response and hold - hold by AG"); 1622 break; 1623 default: 1624 break; 1625 } 1626 break; 1627 default: 1628 break; 1629 } 1630 break; 1631 1632 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1633 switch (hfp_gsm_call_status()){ 1634 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1635 switch (hfp_gsm_callsetup_status()){ 1636 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1637 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1638 hfp_ag_response_and_hold_active = true; 1639 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1640 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1641 // as with regular call 1642 hfp_ag_set_call_indicator(); 1643 hfp_ag_set_callsetup_indicator(); 1644 hfp_ag_hf_accept_call(hfp_connection); 1645 log_info("AG response and hold - hold by HF"); 1646 break; 1647 default: 1648 break; 1649 } 1650 break; 1651 default: 1652 break; 1653 } 1654 break; 1655 1656 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1657 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1658 if (!hfp_ag_response_and_hold_active) break; 1659 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1660 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1661 hfp_ag_response_and_hold_active = false; 1662 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1663 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1664 log_info("Held Call accepted and active"); 1665 break; 1666 1667 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1668 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1669 if (!hfp_ag_response_and_hold_active) break; 1670 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1671 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1672 hfp_ag_response_and_hold_active = false; 1673 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1674 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1675 // from terminate by ag 1676 hfp_ag_set_call_indicator(); 1677 hfp_ag_trigger_terminate_call(); 1678 break; 1679 1680 case HFP_AG_TERMINATE_CALL_BY_HF: 1681 switch (hfp_gsm_call_status()){ 1682 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1683 switch (hfp_gsm_callsetup_status()){ 1684 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1685 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1686 hfp_ag_set_callsetup_indicator(); 1687 hfp_ag_transfer_callsetup_state(); 1688 hfp_ag_trigger_reject_call(); 1689 log_info("HF Rejected Incoming call, AG terminate call"); 1690 break; 1691 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1692 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1693 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1694 hfp_ag_set_callsetup_indicator(); 1695 hfp_ag_transfer_callsetup_state(); 1696 log_info("AG terminate outgoing call process"); 1697 break; 1698 default: 1699 break; 1700 } 1701 break; 1702 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1703 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1704 hfp_ag_set_callsetup_indicator(); 1705 hfp_ag_set_call_indicator(); 1706 hfp_ag_trigger_terminate_call(); 1707 log_info("AG terminate call"); 1708 break; 1709 default: 1710 break; 1711 } 1712 break; 1713 1714 case HFP_AG_TERMINATE_CALL_BY_AG: 1715 switch (hfp_gsm_call_status()){ 1716 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1717 switch (hfp_gsm_callsetup_status()){ 1718 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1719 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1720 hfp_ag_set_callsetup_indicator(); 1721 hfp_ag_trigger_reject_call(); 1722 log_info("AG Rejected Incoming call, AG terminate call"); 1723 break; 1724 default: 1725 break; 1726 } 1727 break; 1728 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1729 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1730 hfp_ag_set_callsetup_indicator(); 1731 hfp_ag_set_call_indicator(); 1732 hfp_ag_trigger_terminate_call(); 1733 log_info("AG terminate call"); 1734 break; 1735 default: 1736 break; 1737 } 1738 break; 1739 case HFP_AG_CALL_DROPPED: 1740 switch (hfp_gsm_call_status()){ 1741 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1742 switch (hfp_gsm_callsetup_status()){ 1743 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1744 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1745 hfp_ag_stop_ringing(); 1746 break; 1747 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1748 log_info("Outgoing call interrupted\n"); 1749 break; 1750 default: 1751 break; 1752 } 1753 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1754 hfp_ag_set_callsetup_indicator(); 1755 hfp_ag_transfer_callsetup_state(); 1756 hfp_ag_trigger_terminate_call(); 1757 break; 1758 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1759 if (hfp_ag_response_and_hold_active) { 1760 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1761 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1762 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1763 } 1764 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1765 hfp_ag_set_callsetup_indicator(); 1766 hfp_ag_set_call_indicator(); 1767 hfp_ag_trigger_terminate_call(); 1768 log_info("AG notify call dropped"); 1769 break; 1770 default: 1771 break; 1772 } 1773 break; 1774 1775 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1776 // directly reject call if number of free slots is exceeded 1777 if (!hfp_gsm_call_possible()){ 1778 hfp_connection->send_error = 1; 1779 hfp_ag_run_for_context(hfp_connection); 1780 break; 1781 } 1782 1783 // note: number not used currently 1784 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1785 1786 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1787 1788 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1789 break; 1790 1791 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1792 // directly reject call if number of free slots is exceeded 1793 if (!hfp_gsm_call_possible()) { 1794 // TODO: no error for user 1795 break; 1796 } 1797 switch (hfp_gsm_call_status()) { 1798 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1799 switch (hfp_gsm_callsetup_status()) { 1800 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1801 // note: number not used currently 1802 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1803 // init call state for all connections 1804 hfp_ag_trigger_outgoing_call(); 1805 // get first one and accept call 1806 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1807 if (hfp_connection) { 1808 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1809 } 1810 break; 1811 default: 1812 // TODO: no error for user 1813 break; 1814 } 1815 break; 1816 default: 1817 // TODO: no error for user 1818 break; 1819 } 1820 break; 1821 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1822 // directly reject call if number of free slots is exceeded 1823 if (!hfp_gsm_call_possible()){ 1824 hfp_connection->send_error = 1; 1825 hfp_ag_run_for_context(hfp_connection); 1826 break; 1827 } 1828 1829 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1830 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1831 1832 log_info("Redial last number"); 1833 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1834 1835 if (strlen(last_dialed_number) > 0){ 1836 log_info("Last number exists: accept call"); 1837 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1838 } else { 1839 log_info("log_infoLast number missing: reject call"); 1840 hfp_ag_handle_reject_outgoing_call(); 1841 } 1842 break; 1843 } 1844 case HFP_AG_OUTGOING_CALL_REJECTED: 1845 hfp_ag_handle_reject_outgoing_call(); 1846 break; 1847 1848 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1849 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1850 if (!hfp_connection){ 1851 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1852 break; 1853 } 1854 1855 hfp_connection->ok_pending = 1; 1856 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1857 break; 1858 } 1859 case HFP_AG_OUTGOING_CALL_RINGING: 1860 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1861 if (!hfp_connection){ 1862 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1863 break; 1864 } 1865 1866 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1867 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1868 hfp_ag_set_callsetup_indicator(); 1869 hfp_ag_transfer_callsetup_state(); 1870 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1871 break; 1872 1873 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1874 // get outgoing call 1875 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1876 if (!hfp_connection){ 1877 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1878 } 1879 if (!hfp_connection){ 1880 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1881 break; 1882 } 1883 1884 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1885 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1886 hfp_connection->call_state = HFP_CALL_ACTIVE; 1887 hfp_ag_set_callsetup_indicator(); 1888 hfp_ag_set_call_indicator(); 1889 hfp_ag_transfer_call_state(); 1890 hfp_ag_transfer_callsetup_state(); 1891 if (callheld_status_call_on_hold_and_no_active_calls){ 1892 hfp_ag_set_callheld_indicator(); 1893 hfp_ag_transfer_callheld_state(); 1894 } 1895 hfp_ag_hf_stop_ringing(hfp_connection); 1896 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1897 break; 1898 } 1899 1900 case HFP_AG_CALL_HOLD_USER_BUSY: 1901 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1902 hfp_ag_set_callsetup_indicator(); 1903 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1904 hfp_connection->call_state = HFP_CALL_ACTIVE; 1905 log_info("AG: Call Waiting, User Busy"); 1906 break; 1907 1908 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1909 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1910 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1911 1912 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1913 if (call_held || call_setup_in_progress){ 1914 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1915 0, NULL); 1916 1917 } 1918 1919 if (call_setup_in_progress){ 1920 log_info("AG: Call Dropped, Accept new call"); 1921 hfp_ag_set_callsetup_indicator(); 1922 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1923 } else { 1924 log_info("AG: Call Dropped, Resume held call"); 1925 } 1926 if (call_held){ 1927 hfp_ag_set_callheld_indicator(); 1928 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1929 } 1930 1931 hfp_connection->call_state = HFP_CALL_ACTIVE; 1932 break; 1933 } 1934 1935 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1936 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1937 // only update if callsetup changed 1938 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1939 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1940 NULL); 1941 1942 if (call_setup_in_progress){ 1943 log_info("AG: Call on Hold, Accept new call"); 1944 hfp_ag_set_callsetup_indicator(); 1945 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1946 } else { 1947 log_info("AG: Swap calls"); 1948 } 1949 1950 hfp_ag_set_callheld_indicator(); 1951 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1952 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1953 hfp_connection->call_state = HFP_CALL_ACTIVE; 1954 break; 1955 } 1956 1957 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1958 // Adds a held call to the conversation. 1959 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1960 log_info("AG: Join 3-way-call"); 1961 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1962 hfp_ag_set_callheld_indicator(); 1963 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1964 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1965 } 1966 hfp_connection->call_state = HFP_CALL_ACTIVE; 1967 break; 1968 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1969 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1970 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1971 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1972 hfp_ag_set_call_indicator(); 1973 hfp_ag_set_callheld_indicator(); 1974 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1975 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1976 hfp_connection->call_state = HFP_CALL_IDLE; 1977 break; 1978 1979 default: 1980 break; 1981 } 1982 1983 1984 } 1985 1986 1987 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 1988 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 1989 if (!active_call) return; 1990 1991 int idx = active_call->index; 1992 hfp_enhanced_call_dir_t dir = active_call->direction; 1993 hfp_enhanced_call_status_t status = active_call->enhanced_status; 1994 hfp_enhanced_call_mode_t mode = active_call->mode; 1995 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 1996 uint8_t type = active_call->clip_type; 1997 char * number = active_call->clip_number; 1998 1999 char buffer[100]; 2000 // TODO: check length of a buffer, to fit the MTU 2001 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2002 if (number){ 2003 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2004 } 2005 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2006 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, 2007 mode, mpty, type, number); 2008 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2009 } 2010 2011 // sends pending command, returns if command was sent 2012 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2013 if (hfp_connection->send_status_of_current_calls){ 2014 hfp_connection->ok_pending = 0; 2015 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2016 hfp_connection->next_call_index++; 2017 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2018 return 1; 2019 } else { 2020 // 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 2021 hfp_connection->next_call_index = 0; 2022 hfp_connection->ok_pending = 1; 2023 hfp_connection->send_status_of_current_calls = 0; 2024 } 2025 } 2026 2027 if (hfp_connection->ag_notify_incoming_call_waiting){ 2028 hfp_connection->ag_notify_incoming_call_waiting = 0; 2029 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2030 return 1; 2031 } 2032 2033 if (hfp_connection->send_error){ 2034 hfp_connection->send_error = 0; 2035 hfp_connection->command = HFP_CMD_NONE; 2036 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2037 return 1; 2038 } 2039 2040 // note: before update AG indicators and ok_pending 2041 if (hfp_connection->send_response_and_hold_status){ 2042 int status = hfp_connection->send_response_and_hold_status - 1; 2043 hfp_connection->send_response_and_hold_status = 0; 2044 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2045 return 1; 2046 } 2047 2048 if (hfp_connection->ok_pending){ 2049 hfp_connection->ok_pending = 0; 2050 hfp_connection->command = HFP_CMD_NONE; 2051 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2052 return 1; 2053 } 2054 2055 // update AG indicators 2056 if (hfp_connection->ag_indicators_status_update_bitmap){ 2057 int i; 2058 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2059 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2060 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2061 if (!hfp_connection->enable_status_update_for_ag_indicators) { 2062 log_info("+CMER:3,0,0,0 - not sending update for '%s'", hfp_ag_indicators[i].name); 2063 break; 2064 } 2065 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2066 return 1; 2067 } 2068 } 2069 } 2070 2071 if (hfp_connection->ag_send_no_carrier){ 2072 hfp_connection->ag_send_no_carrier = false; 2073 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2074 return 1; 2075 } 2076 2077 if (hfp_connection->ag_ring){ 2078 hfp_connection->ag_ring = 0; 2079 hfp_connection->command = HFP_CMD_NONE; 2080 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2081 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2082 return 1; 2083 } 2084 2085 if (hfp_connection->ag_send_clip){ 2086 hfp_connection->ag_send_clip = 0; 2087 hfp_connection->command = HFP_CMD_NONE; 2088 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2089 return 1; 2090 } 2091 2092 if (hfp_connection->send_phone_number_for_voice_tag){ 2093 hfp_connection->send_phone_number_for_voice_tag = 0; 2094 hfp_connection->command = HFP_CMD_NONE; 2095 hfp_connection->ok_pending = 1; 2096 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2097 return 1; 2098 } 2099 2100 if (hfp_connection->send_subscriber_number){ 2101 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2102 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2103 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2104 } else { 2105 hfp_connection->send_subscriber_number = 0; 2106 hfp_connection->next_subscriber_number_to_send = 0; 2107 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2108 } 2109 hfp_connection->command = HFP_CMD_NONE; 2110 return 1; 2111 } 2112 2113 if (hfp_connection->send_microphone_gain){ 2114 hfp_connection->send_microphone_gain = 0; 2115 hfp_connection->command = HFP_CMD_NONE; 2116 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2117 return 1; 2118 } 2119 2120 if (hfp_connection->send_speaker_gain){ 2121 hfp_connection->send_speaker_gain = 0; 2122 hfp_connection->command = HFP_CMD_NONE; 2123 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2124 return 1; 2125 } 2126 2127 if (hfp_connection->send_ag_status_indicators){ 2128 hfp_connection->send_ag_status_indicators = 0; 2129 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2130 return 1; 2131 } 2132 2133 return 0; 2134 } 2135 2136 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2137 2138 btstack_assert(hfp_connection != NULL); 2139 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2140 2141 // during SDP query, RFCOMM CID is not set 2142 if (hfp_connection->rfcomm_cid == 0) return; 2143 2144 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2145 hfp_connection->emit_vra_enabled_after_audio_established = false; 2146 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2147 } 2148 2149 // assert command could be sent 2150 if (hci_can_send_command_packet_now() == 0) return; 2151 2152 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2153 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2154 hfp_connection->release_audio_connection = 0; 2155 gap_disconnect(hfp_connection->sco_handle); 2156 return; 2157 } 2158 2159 #ifdef ENABLE_CC256X_ASSISTED_HFP 2160 // WBS Disassociate 2161 if (hfp_connection->cc256x_send_wbs_disassociate){ 2162 hfp_connection->cc256x_send_wbs_disassociate = false; 2163 hci_send_cmd(&hci_ti_wbs_disassociate); 2164 return; 2165 } 2166 // Write Codec Config 2167 if (hfp_connection->cc256x_send_write_codec_config){ 2168 hfp_connection->cc256x_send_write_codec_config = false; 2169 hfp_cc256x_write_codec_config(hfp_connection); 2170 return; 2171 } 2172 // WBS Associate 2173 if (hfp_connection->cc256x_send_wbs_associate){ 2174 hfp_connection->cc256x_send_wbs_associate = false; 2175 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2176 return; 2177 } 2178 #endif 2179 #ifdef ENABLE_BCM_PCM_WBS 2180 // Enable WBS 2181 if (hfp_connection->bcm_send_enable_wbs){ 2182 hfp_connection->bcm_send_enable_wbs = false; 2183 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2184 return; 2185 } 2186 // Write I2S/PCM params 2187 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2188 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2189 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2190 return; 2191 } 2192 // Disable WBS 2193 if (hfp_connection->bcm_send_disable_wbs){ 2194 hfp_connection->bcm_send_disable_wbs = false; 2195 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2196 return; 2197 } 2198 #endif 2199 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2200 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2201 hfp_finalize_connection_context(hfp_connection); 2202 return; 2203 } 2204 #endif 2205 2206 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2207 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2208 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2209 return; 2210 } 2211 2212 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2213 2214 if (!cmd_sent){ 2215 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2216 } 2217 2218 if (!cmd_sent){ 2219 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2220 } 2221 2222 if (!cmd_sent){ 2223 cmd_sent = call_setup_state_machine(hfp_connection); 2224 } 2225 2226 if (!cmd_sent){ 2227 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2228 } 2229 2230 if (!cmd_sent){ 2231 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2232 } 2233 2234 // disconnect 2235 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2236 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2237 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2238 } 2239 2240 if (cmd_sent){ 2241 hfp_connection->command = HFP_CMD_NONE; 2242 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2243 } 2244 } 2245 2246 static int hfp_parser_is_end_of_line(uint8_t byte){ 2247 return (byte == '\n') || (byte == '\r'); 2248 } 2249 2250 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2251 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2252 if (size < 1) return; 2253 uint8_t status = ERROR_CODE_SUCCESS; 2254 2255 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2256 #ifdef ENABLE_HFP_AT_MESSAGES 2257 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2258 #endif 2259 2260 // process messages byte-wise 2261 int pos; 2262 for (pos = 0; pos < size ; pos++){ 2263 hfp_parse(hfp_connection, packet[pos], 0); 2264 2265 // parse until end of line 2266 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2267 2268 hfp_generic_status_indicator_t * indicator; 2269 switch(hfp_connection->command){ 2270 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2271 hfp_connection->command = HFP_CMD_NONE; 2272 hfp_connection->ag_vra_requested_by_hf = true; 2273 break; 2274 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2275 hfp_connection->command = HFP_CMD_NONE; 2276 if (hfp_ag_response_and_hold_active){ 2277 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2278 } 2279 hfp_connection->ok_pending = 1; 2280 break; 2281 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2282 hfp_connection->command = HFP_CMD_NONE; 2283 switch(hfp_connection->ag_response_and_hold_action){ 2284 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2285 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2286 break; 2287 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2288 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2289 break; 2290 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2291 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2292 break; 2293 default: 2294 break; 2295 } 2296 hfp_connection->ok_pending = 1; 2297 break; 2298 case HFP_CMD_HF_INDICATOR_STATUS: 2299 hfp_connection->command = HFP_CMD_NONE; 2300 2301 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2302 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2303 switch (indicator->uuid){ 2304 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2305 if (hfp_connection->parser_indicator_value > 1) { 2306 hfp_connection->send_error = 1; 2307 break; 2308 } 2309 hfp_connection->ok_pending = 1; 2310 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2311 break; 2312 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2313 if (hfp_connection->parser_indicator_value > 100){ 2314 hfp_connection->send_error = 1; 2315 break; 2316 } 2317 hfp_connection->ok_pending = 1; 2318 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2319 break; 2320 default: 2321 hfp_connection->send_error = 1; 2322 break; 2323 } 2324 } else { 2325 hfp_connection->send_error = 1; 2326 } 2327 break; 2328 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2329 // expected by SLC state machine 2330 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2331 hfp_connection->send_ag_indicators_segment = 0; 2332 hfp_connection->send_ag_status_indicators = 1; 2333 break; 2334 case HFP_CMD_LIST_CURRENT_CALLS: 2335 hfp_connection->command = HFP_CMD_NONE; 2336 hfp_connection->next_call_index = 0; 2337 hfp_connection->send_status_of_current_calls = 1; 2338 break; 2339 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2340 hfp_connection->command = HFP_CMD_NONE; 2341 if (hfp_ag_subscriber_numbers_count == 0){ 2342 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2343 break; 2344 } 2345 hfp_connection->next_subscriber_number_to_send = 0; 2346 hfp_connection->send_subscriber_number = 1; 2347 break; 2348 case HFP_CMD_TRANSMIT_DTMF_CODES: 2349 { 2350 hfp_connection->command = HFP_CMD_NONE; 2351 char buffer[2]; 2352 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2353 buffer[1] = 0; 2354 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2355 break; 2356 } 2357 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2358 hfp_connection->command = HFP_CMD_NONE; 2359 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2360 break; 2361 case HFP_CMD_TURN_OFF_EC_AND_NR: 2362 hfp_connection->command = HFP_CMD_NONE; 2363 2364 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2365 hfp_connection->ok_pending = 1; 2366 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2367 status = ERROR_CODE_SUCCESS; 2368 } else { 2369 hfp_connection->send_error = 1; 2370 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2371 } 2372 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2373 break; 2374 case HFP_CMD_CALL_ANSWERED: 2375 hfp_connection->command = HFP_CMD_NONE; 2376 log_info("HFP: ATA"); 2377 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2378 break; 2379 case HFP_CMD_HANG_UP_CALL: 2380 hfp_connection->command = HFP_CMD_NONE; 2381 hfp_connection->ok_pending = 1; 2382 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2383 break; 2384 case HFP_CMD_CALL_HOLD: { 2385 hfp_connection->command = HFP_CMD_NONE; 2386 hfp_connection->ok_pending = 1; 2387 2388 switch (hfp_connection->ag_call_hold_action){ 2389 case 0: 2390 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2391 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2392 break; 2393 case 1: 2394 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2395 // Where both a held and a waiting call exist, the above procedures shall apply to the 2396 // waiting call (i.e., not to the held call) in conflicting situation. 2397 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2398 break; 2399 case 2: 2400 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2401 // Where both a held and a waiting call exist, the above procedures shall apply to the 2402 // waiting call (i.e., not to the held call) in conflicting situation. 2403 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2404 break; 2405 case 3: 2406 // Adds a held call to the conversation. 2407 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2408 break; 2409 case 4: 2410 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2411 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2412 break; 2413 default: 2414 break; 2415 } 2416 hfp_connection->call_index = 0; 2417 break; 2418 } 2419 case HFP_CMD_CALL_PHONE_NUMBER: 2420 hfp_connection->command = HFP_CMD_NONE; 2421 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2422 break; 2423 case HFP_CMD_REDIAL_LAST_NUMBER: 2424 hfp_connection->command = HFP_CMD_NONE; 2425 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2426 break; 2427 case HFP_CMD_ENABLE_CLIP: 2428 hfp_connection->command = HFP_CMD_NONE; 2429 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2430 hfp_connection->ok_pending = 1; 2431 break; 2432 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2433 hfp_connection->command = HFP_CMD_NONE; 2434 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2435 hfp_connection->ok_pending = 1; 2436 break; 2437 case HFP_CMD_SET_SPEAKER_GAIN: 2438 hfp_connection->command = HFP_CMD_NONE; 2439 hfp_connection->ok_pending = 1; 2440 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2441 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2442 break; 2443 case HFP_CMD_SET_MICROPHONE_GAIN: 2444 hfp_connection->command = HFP_CMD_NONE; 2445 hfp_connection->ok_pending = 1; 2446 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2447 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2448 break; 2449 case HFP_CMD_UNKNOWN: 2450 hfp_connection->command = HFP_CMD_NONE; 2451 hfp_connection->send_error = 1; 2452 break; 2453 default: 2454 break; 2455 } 2456 } 2457 } 2458 2459 static void hfp_ag_run(void){ 2460 btstack_linked_list_iterator_t it; 2461 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2462 while (btstack_linked_list_iterator_has_next(&it)){ 2463 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2464 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2465 hfp_ag_run_for_context(hfp_connection); 2466 } 2467 } 2468 2469 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2470 hfp_connection_t * hfp_connection = NULL; 2471 switch (packet_type){ 2472 case RFCOMM_DATA_PACKET: 2473 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2474 btstack_assert(hfp_connection != NULL); 2475 2476 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2477 hfp_ag_run_for_context(hfp_connection); 2478 return; 2479 case HCI_EVENT_PACKET: 2480 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2481 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2482 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2483 btstack_assert(hfp_connection != NULL); 2484 2485 hfp_ag_run_for_context(hfp_connection); 2486 return; 2487 } 2488 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2489 break; 2490 default: 2491 break; 2492 } 2493 2494 hfp_ag_run(); 2495 } 2496 2497 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2498 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2499 hfp_ag_run(); 2500 } 2501 2502 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2503 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2504 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2505 return; 2506 } 2507 int i; 2508 hfp_ag_codecs_nr = codecs_nr; 2509 for (i=0; i < codecs_nr; i++){ 2510 hfp_ag_codecs[i] = codecs[i]; 2511 } 2512 } 2513 2514 void hfp_ag_init_supported_features(uint32_t supported_features){ 2515 hfp_ag_supported_features = supported_features; 2516 } 2517 2518 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2519 hfp_ag_indicators_nr = ag_indicators_nr; 2520 (void)memcpy(hfp_ag_indicators, ag_indicators, 2521 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2522 } 2523 2524 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2525 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2526 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2527 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2528 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2529 } 2530 2531 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2532 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2533 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2534 call_hold_services_nr * sizeof(char *)); 2535 } 2536 2537 2538 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2539 2540 hfp_init(); 2541 hfp_ag_call_hold_services_nr = 0; 2542 hfp_ag_response_and_hold_active = false; 2543 hfp_ag_indicators_nr = 0; 2544 hfp_ag_codecs_nr = 0; 2545 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2546 hfp_ag_subscriber_numbers = NULL; 2547 hfp_ag_subscriber_numbers_count = 0; 2548 2549 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2550 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2551 2552 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2553 2554 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2555 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2556 2557 hfp_gsm_init(); 2558 } 2559 2560 void hfp_ag_deinit(void){ 2561 hfp_deinit(); 2562 hfp_gsm_deinit(); 2563 2564 hfp_ag_callback = NULL; 2565 hfp_ag_supported_features = 0; 2566 hfp_ag_codecs_nr = 0; 2567 hfp_ag_indicators_nr = 0; 2568 hfp_ag_call_hold_services_nr = 0; 2569 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2570 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2571 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2572 hfp_ag_subscriber_numbers = NULL; 2573 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2574 } 2575 2576 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2577 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2578 } 2579 2580 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2581 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2582 if (!hfp_connection){ 2583 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2584 } 2585 2586 hfp_trigger_release_service_level_connection(hfp_connection); 2587 hfp_ag_run_for_context(hfp_connection); 2588 return ERROR_CODE_SUCCESS; 2589 } 2590 2591 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2592 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2593 if (!hfp_connection){ 2594 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2595 } 2596 2597 hfp_connection->extended_audio_gateway_error = 0; 2598 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2599 return ERROR_CODE_COMMAND_DISALLOWED; 2600 } 2601 2602 hfp_connection->extended_audio_gateway_error = error; 2603 hfp_ag_run_for_context(hfp_connection); 2604 return ERROR_CODE_SUCCESS; 2605 } 2606 2607 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2608 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2609 return ERROR_CODE_COMMAND_DISALLOWED; 2610 } 2611 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2612 return ERROR_CODE_COMMAND_DISALLOWED; 2613 } 2614 2615 hfp_connection->establish_audio_connection = 1; 2616 if (!has_codec_negotiation_feature(hfp_connection)){ 2617 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2618 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2619 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2620 // now, pick link settings 2621 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2622 #ifdef ENABLE_CC256X_ASSISTED_HFP 2623 hfp_cc256x_prepare_for_sco(hfp_connection); 2624 #endif 2625 return ERROR_CODE_SUCCESS; 2626 } 2627 2628 uint8_t i; 2629 bool codec_was_in_use = false; 2630 bool better_codec_can_be_used = false; 2631 2632 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2633 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2634 codec_was_in_use = true; 2635 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2636 better_codec_can_be_used = true; 2637 } 2638 } 2639 2640 if (!codec_was_in_use || better_codec_can_be_used){ 2641 hfp_connection->ag_send_common_codec = true; 2642 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2643 } 2644 return ERROR_CODE_SUCCESS; 2645 } 2646 2647 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2648 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2649 if (!hfp_connection){ 2650 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2651 } 2652 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2653 if (status != ERROR_CODE_SUCCESS){ 2654 return status; 2655 } 2656 hfp_ag_run_for_context(hfp_connection); 2657 return ERROR_CODE_SUCCESS; 2658 } 2659 2660 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2661 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2662 if (!hfp_connection){ 2663 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2664 } 2665 2666 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2667 return ERROR_CODE_COMMAND_DISALLOWED; 2668 } 2669 2670 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2671 if (status == ERROR_CODE_SUCCESS){ 2672 hfp_ag_run_for_context(hfp_connection); 2673 } 2674 return status; 2675 } 2676 2677 /** 2678 * @brief Enable in-band ring tone 2679 */ 2680 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2681 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2682 return; 2683 } 2684 2685 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2686 2687 btstack_linked_list_iterator_t it; 2688 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2689 while (btstack_linked_list_iterator_has_next(&it)){ 2690 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2691 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2692 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2693 hfp_ag_run_for_context(hfp_connection); 2694 } 2695 } 2696 2697 /** 2698 * @brief Called from GSM 2699 */ 2700 void hfp_ag_incoming_call(void){ 2701 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2702 } 2703 2704 void hfp_ag_outgoing_call_initiated(const char * number) { 2705 UNUSED(number); 2706 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2707 } 2708 2709 /** 2710 * @brief number is stored. 2711 */ 2712 void hfp_ag_set_clip(uint8_t type, const char * number){ 2713 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2714 } 2715 2716 void hfp_ag_call_dropped(void){ 2717 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2718 } 2719 2720 // call from AG UI 2721 void hfp_ag_answer_incoming_call(void){ 2722 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2723 } 2724 2725 void hfp_ag_join_held_call(void){ 2726 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2727 } 2728 2729 void hfp_ag_terminate_call(void){ 2730 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2731 } 2732 2733 void hfp_ag_outgoing_call_ringing(void){ 2734 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2735 } 2736 2737 void hfp_ag_outgoing_call_established(void){ 2738 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2739 } 2740 2741 void hfp_ag_outgoing_call_rejected(void){ 2742 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2743 } 2744 2745 void hfp_ag_outgoing_call_accepted(void){ 2746 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2747 } 2748 2749 void hfp_ag_hold_incoming_call(void){ 2750 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2751 } 2752 2753 void hfp_ag_accept_held_incoming_call(void) { 2754 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2755 } 2756 2757 void hfp_ag_reject_held_incoming_call(void){ 2758 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2759 } 2760 2761 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2762 int indicator_index = get_ag_indicator_index_for_name(name); 2763 if (indicator_index < 0) return; 2764 hfp_ag_indicators[indicator_index].status = value; 2765 2766 btstack_linked_list_iterator_t it; 2767 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2768 while (btstack_linked_list_iterator_has_next(&it)){ 2769 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2770 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2771 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2772 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2773 continue; 2774 } 2775 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2776 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2777 hfp_ag_run_for_context(hfp_connection); 2778 } 2779 } 2780 2781 uint8_t hfp_ag_set_registration_status(int registration_status){ 2782 if ((registration_status < 0) || (registration_status > 1)){ 2783 return ERROR_CODE_COMMAND_DISALLOWED; 2784 } 2785 2786 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2787 2788 // if network goes away wihle a call is active: 2789 // - the call gets dropped 2790 // - we send NO CARRIER 2791 // NOTE: the CALL=0 has to be sent before NO CARRIER 2792 2793 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2794 2795 btstack_linked_list_iterator_t it; 2796 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2797 while (btstack_linked_list_iterator_has_next(&it)){ 2798 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2799 hfp_connection->ag_send_no_carrier = true; 2800 } 2801 } 2802 hfp_ag_set_ag_indicator("service", registration_status); 2803 return ERROR_CODE_SUCCESS; 2804 } 2805 2806 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2807 if ((signal_strength < 0) || (signal_strength > 5)){ 2808 return ERROR_CODE_COMMAND_DISALLOWED; 2809 } 2810 2811 hfp_ag_set_ag_indicator("signal", signal_strength); 2812 return ERROR_CODE_SUCCESS; 2813 } 2814 2815 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2816 if ((roaming_status < 0) || (roaming_status > 1)){ 2817 return ERROR_CODE_COMMAND_DISALLOWED; 2818 } 2819 2820 hfp_ag_set_ag_indicator("roam", roaming_status); 2821 return ERROR_CODE_SUCCESS; 2822 } 2823 2824 uint8_t hfp_ag_set_battery_level(int battery_level){ 2825 if ((battery_level < 0) || (battery_level > 5)){ 2826 return ERROR_CODE_COMMAND_DISALLOWED; 2827 } 2828 hfp_ag_set_ag_indicator("battchg", battery_level); 2829 return ERROR_CODE_SUCCESS; 2830 } 2831 2832 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2833 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2834 if (!hfp_connection){ 2835 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2836 } 2837 2838 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2839 return ERROR_CODE_COMMAND_DISALLOWED; 2840 } 2841 2842 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2843 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2844 if (!enhanced_vra_supported && !legacy_vra_supported){ 2845 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2846 } 2847 2848 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2849 return ERROR_CODE_COMMAND_DISALLOWED; 2850 } 2851 2852 hfp_connection->ag_activate_voice_recognition_value = 1; 2853 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2854 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2855 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2856 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2857 hfp_connection->ag_vra_send_command = true; 2858 hfp_ag_run_for_context(hfp_connection); 2859 return ERROR_CODE_SUCCESS; 2860 } 2861 2862 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2863 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2864 if (!hfp_connection){ 2865 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2866 } 2867 2868 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2869 return ERROR_CODE_COMMAND_DISALLOWED; 2870 } 2871 2872 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2873 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2874 2875 if (!enhanced_vra_supported && !legacy_vra_supported){ 2876 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2877 } 2878 2879 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2880 return ERROR_CODE_COMMAND_DISALLOWED; 2881 } 2882 2883 hfp_connection->ag_activate_voice_recognition_value = 0; 2884 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2885 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2886 hfp_connection->ag_vra_send_command = true; 2887 hfp_ag_run_for_context(hfp_connection); 2888 return ERROR_CODE_SUCCESS; 2889 } 2890 2891 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2892 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2893 if (!hfp_connection){ 2894 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2895 } 2896 2897 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2898 return ERROR_CODE_COMMAND_DISALLOWED; 2899 } 2900 2901 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2902 return ERROR_CODE_COMMAND_DISALLOWED; 2903 } 2904 2905 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2906 return ERROR_CODE_COMMAND_DISALLOWED; 2907 } 2908 2909 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2910 if (!enhanced_vra_supported ){ 2911 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2912 } 2913 2914 2915 hfp_connection->ag_vra_state = state; 2916 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2917 hfp_connection->ag_vra_send_command = true; 2918 hfp_ag_run_for_context(hfp_connection); 2919 return ERROR_CODE_SUCCESS; 2920 } 2921 2922 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2923 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2924 } 2925 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2926 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2927 } 2928 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2929 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2930 } 2931 2932 2933 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){ 2934 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2935 if (!hfp_connection){ 2936 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2937 } 2938 2939 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2940 return ERROR_CODE_COMMAND_DISALLOWED; 2941 } 2942 2943 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2944 return ERROR_CODE_COMMAND_DISALLOWED; 2945 } 2946 2947 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2948 return ERROR_CODE_COMMAND_DISALLOWED; 2949 } 2950 2951 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2952 if (!enhanced_vra_supported ){ 2953 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2954 } 2955 2956 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 2957 if (!enhanced_vra_msg_supported ){ 2958 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2959 } 2960 2961 uint16_t message_len = strlen(msg.text); 2962 2963 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 2964 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2965 } 2966 2967 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 2968 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2969 } 2970 2971 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 2972 hfp_connection->ag_msg = msg; 2973 hfp_connection->ag_vra_state = state; 2974 hfp_connection->ag_vra_send_command = true; 2975 hfp_ag_run_for_context(hfp_connection); 2976 2977 return ERROR_CODE_SUCCESS; 2978 } 2979 2980 2981 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 2982 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2983 if (!hfp_connection){ 2984 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2985 } 2986 2987 if ((gain < 0) || (gain > 15)){ 2988 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 2989 return ERROR_CODE_COMMAND_DISALLOWED; 2990 } 2991 2992 if (hfp_connection->microphone_gain != gain){ 2993 hfp_connection->microphone_gain = gain; 2994 hfp_connection->send_microphone_gain = 1; 2995 } 2996 hfp_ag_run_for_context(hfp_connection); 2997 return ERROR_CODE_SUCCESS; 2998 } 2999 3000 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 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 ((gain < 0) || (gain > 15)){ 3007 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3008 return ERROR_CODE_COMMAND_DISALLOWED; 3009 } 3010 3011 if (hfp_connection->speaker_gain != gain){ 3012 hfp_connection->speaker_gain = gain; 3013 hfp_connection->send_speaker_gain = 1; 3014 } 3015 hfp_ag_run_for_context(hfp_connection); 3016 return ERROR_CODE_SUCCESS; 3017 } 3018 3019 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3020 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3021 if (!hfp_connection){ 3022 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3023 } 3024 3025 hfp_ag_set_clip(0, number); 3026 hfp_connection->send_phone_number_for_voice_tag = 1; 3027 return ERROR_CODE_SUCCESS; 3028 } 3029 3030 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3031 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3032 if (!hfp_connection){ 3033 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3034 } 3035 3036 hfp_connection->send_error = 1; 3037 return ERROR_CODE_SUCCESS; 3038 } 3039 3040 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3041 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3042 if (!hfp_connection){ 3043 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3044 } 3045 3046 hfp_connection->ok_pending = 1; 3047 return ERROR_CODE_SUCCESS; 3048 } 3049 3050 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3051 hfp_ag_subscriber_numbers = numbers; 3052 hfp_ag_subscriber_numbers_count = numbers_count; 3053 } 3054 3055 void hfp_ag_clear_last_dialed_number(void){ 3056 hfp_gsm_clear_last_dialed_number(); 3057 } 3058 3059 void hfp_ag_set_last_dialed_number(const char * number){ 3060 hfp_gsm_set_last_dialed_number(number); 3061 } 3062 3063 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3064 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3065 if (!hfp_connection){ 3066 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3067 } 3068 3069 if (!hfp_connection->call_waiting_notification_enabled){ 3070 return ERROR_CODE_COMMAND_DISALLOWED; 3071 } 3072 3073 hfp_connection->ag_notify_incoming_call_waiting = 1; 3074 hfp_ag_run_for_context(hfp_connection); 3075 return ERROR_CODE_SUCCESS; 3076 } 3077 3078 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){ 3079 if (!name){ 3080 name = hfp_ag_default_service_name; 3081 } 3082 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3083 3084 /* 3085 * 0x01 – Ability to reject a call 3086 * 0x00 – No ability to reject a call 3087 */ 3088 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3089 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3090 3091 // Construct SupportedFeatures for SDP bitmap: 3092 // 3093 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3094 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3095 // 3096 // Wide band speech (bit 5) requires Codec negotiation 3097 // 3098 uint16_t sdp_features = supported_features & 0x1f; 3099 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3100 sdp_features |= 1 << 5; 3101 } 3102 3103 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3104 sdp_features |= 1 << 6; 3105 } 3106 3107 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3108 sdp_features |= 1 << 7; 3109 } 3110 3111 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3112 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3113 } 3114 3115 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3116 btstack_assert(callback != NULL); 3117 3118 hfp_ag_callback = callback; 3119 hfp_set_ag_callback(callback); 3120 } 3121