1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hfp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HFP Audio Gateway (AG) unit 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "hci_cmd.h" 53 #include "btstack_run_loop.h" 54 55 #include "bluetooth_sdp.h" 56 #include "hci.h" 57 #include "btstack_memory.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 #include "btstack_debug.h" 61 #include "btstack_event.h" 62 #include "classic/core.h" 63 #include "classic/hfp.h" 64 #include "classic/hfp_ag.h" 65 #include "classic/hfp_gsm_model.h" 66 #include "classic/sdp_client_rfcomm.h" 67 #include "classic/sdp_server.h" 68 #include "classic/sdp_util.h" 69 70 // private prototypes 71 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection); 72 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection); 73 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection); 74 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection); 75 76 // public prototypes 77 hfp_generic_status_indicator_t * get_hfp_generic_status_indicators(void); 78 int get_hfp_generic_status_indicators_nr(void); 79 void set_hfp_generic_status_indicators(hfp_generic_status_indicator_t * indicators, int indicator_nr); 80 void set_hfp_ag_indicators(hfp_ag_indicator_t * indicators, int indicator_nr); 81 int get_hfp_ag_indicators_nr(hfp_connection_t * context); 82 hfp_ag_indicator_t * get_hfp_ag_indicators(hfp_connection_t * context); 83 84 #define HFP_SUBEVENT_INVALID 0xFFFF 85 86 // const 87 static const char hfp_ag_default_service_name[] = "Voice gateway"; 88 89 // globals 90 91 // higher layer callbacks 92 static btstack_packet_handler_t hfp_ag_callback; 93 94 static 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 #ifdef ENABLE_RTK_PCM_WBS 637 hfp_connection->rtk_send_sco_config = true; 638 #endif 639 return 1; 640 default: 641 break; 642 } 643 return 0; 644 } 645 646 static void hfp_ag_slc_established(hfp_connection_t * hfp_connection){ 647 hfp_connection->state = HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED; 648 hfp_emit_slc_connection_event(hfp_connection, 0, hfp_connection->acl_handle, hfp_connection->remote_addr); 649 650 // if active call exist, set per-hfp_connection state active, too (when audio is on) 651 if (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT){ 652 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 653 } 654 // if AG is ringing, also start ringing on the HF 655 if (hfp_gsm_call_status() == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){ 656 switch (hfp_gsm_callsetup_status()){ 657 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 658 hfp_ag_hf_start_ringing_incoming(hfp_connection); 659 break; 660 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 661 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 662 break; 663 default: 664 break; 665 } 666 } 667 } 668 669 static int hfp_ag_run_for_context_service_level_connection(hfp_connection_t * hfp_connection){ 670 // log_info("hfp_ag_run_for_context_service_level_connection state %u, command %u", hfp_connection->state, hfp_connection->command); 671 if (hfp_connection->state >= HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) return 0; 672 int sent = 0; 673 switch(hfp_connection->command){ 674 case HFP_CMD_SUPPORTED_FEATURES: 675 switch(hfp_connection->state){ 676 case HFP_W4_EXCHANGE_SUPPORTED_FEATURES: 677 case HFP_EXCHANGE_SUPPORTED_FEATURES: 678 hfp_hf_drop_mSBC_if_eSCO_not_supported(hfp_ag_codecs, &hfp_ag_codecs_nr); 679 if (has_codec_negotiation_feature(hfp_connection)){ 680 hfp_connection->state = HFP_W4_NOTIFY_ON_CODECS; 681 } else { 682 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 683 } 684 hfp_ag_exchange_supported_features_cmd(hfp_connection->rfcomm_cid); 685 return 1; 686 default: 687 break; 688 } 689 break; 690 case HFP_CMD_AVAILABLE_CODECS: 691 sent = codecs_exchange_state_machine(hfp_connection); 692 if (hfp_connection->codecs_state == HFP_CODECS_RECEIVED_LIST){ 693 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS; 694 } 695 return sent; 696 697 case HFP_CMD_RETRIEVE_AG_INDICATORS: 698 if (hfp_connection->state == HFP_W4_RETRIEVE_INDICATORS) { 699 // HF requested AG Indicators and we did expect it 700 hfp_connection->send_ag_indicators_segment = 0; 701 hfp_connection->state = HFP_RETRIEVE_INDICATORS; 702 // continue below in state switch 703 } 704 break; 705 706 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 707 if (hfp_connection->state != HFP_W4_RETRIEVE_INDICATORS_STATUS) break; 708 hfp_connection->state = HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE; 709 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 710 return 1; 711 712 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 713 if (hfp_connection->state != HFP_W4_ENABLE_INDICATORS_STATUS_UPDATE) break; 714 if (has_call_waiting_and_3way_calling_feature(hfp_connection)){ 715 hfp_connection->state = HFP_W4_RETRIEVE_CAN_HOLD_CALL; 716 } else if (has_hf_indicators_feature(hfp_connection)){ 717 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 718 } else { 719 hfp_ag_slc_established(hfp_connection); 720 } 721 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 722 return 1; 723 724 case HFP_CMD_SUPPORT_CALL_HOLD_AND_MULTIPARTY_SERVICES: 725 if (hfp_connection->state != HFP_W4_RETRIEVE_CAN_HOLD_CALL) break; 726 if (has_hf_indicators_feature(hfp_connection)){ 727 hfp_connection->state = HFP_W4_LIST_GENERIC_STATUS_INDICATORS; 728 } 729 hfp_ag_send_retrieve_can_hold_call_cmd(hfp_connection->rfcomm_cid); 730 if (!has_hf_indicators_feature(hfp_connection)){ 731 hfp_ag_slc_established(hfp_connection); 732 } 733 return 1; 734 735 case HFP_CMD_LIST_GENERIC_STATUS_INDICATORS: 736 if (hfp_connection->state != HFP_W4_LIST_GENERIC_STATUS_INDICATORS) break; 737 hfp_connection->state = HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS; 738 hfp_ag_send_list_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 739 return 1; 740 741 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS: 742 if (hfp_connection->state != HFP_W4_RETRIEVE_GENERIC_STATUS_INDICATORS) break; 743 hfp_connection->state = HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS; 744 hfp_ag_send_retrieve_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 745 return 1; 746 747 case HFP_CMD_RETRIEVE_GENERIC_STATUS_INDICATORS_STATE: 748 if (hfp_connection->state != HFP_W4_RETRIEVE_INITITAL_STATE_GENERIC_STATUS_INDICATORS) break; 749 hfp_ag_slc_established(hfp_connection); 750 hfp_ag_send_retrieve_initital_supported_generic_status_indicators_cmd(hfp_connection->rfcomm_cid); 751 return 1; 752 default: 753 break; 754 } 755 756 switch (hfp_connection->state){ 757 case HFP_RETRIEVE_INDICATORS: { 758 int next_segment = hfp_ag_send_retrieve_indicators_cmd_via_generator(hfp_connection->rfcomm_cid, hfp_connection, hfp_connection->send_ag_indicators_segment); 759 int num_segments = hfp_ag_indicators_cmd_generator_num_segments(hfp_connection); 760 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS next segment %u, num_segments %u", next_segment, num_segments); 761 if (next_segment < num_segments){ 762 // prepare sending of next segment 763 hfp_connection->send_ag_indicators_segment = next_segment; 764 log_info("HFP_CMD_RETRIEVE_AG_INDICATORS more. command %u, next seg %u", hfp_connection->command, next_segment); 765 } else { 766 // done, go to next state 767 hfp_connection->send_ag_indicators_segment = 0; 768 hfp_connection->state = HFP_W4_RETRIEVE_INDICATORS_STATUS; 769 } 770 return 1; 771 } 772 default: 773 break; 774 } 775 return 0; 776 } 777 778 static bool hfp_ag_vra_flag_supported(hfp_connection_t * hfp_connection){ 779 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_FUNCTION); 780 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_FUNCTION); 781 return hf && ag; 782 } 783 784 static bool hfp_ag_enhanced_vra_flag_supported(hfp_connection_t * hfp_connection){ 785 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS); 786 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_ENHANCED_VOICE_RECOGNITION_STATUS); 787 return hf && ag; 788 } 789 790 static bool hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection_t * hfp_connection){ 791 int ag = get_bit(hfp_ag_supported_features, HFP_AGSF_VOICE_RECOGNITION_TEXT); 792 int hf = get_bit(hfp_connection->remote_supported_features, HFP_HFSF_VOICE_RECOGNITION_TEXT); 793 return hf && ag; 794 } 795 796 static bool hfp_ag_can_activate_voice_recognition(hfp_connection_t * hfp_connection){ 797 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 798 return false; 799 } 800 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_OFF){ 801 return false; 802 } 803 if (hfp_connection->ag_vra_send_command){ 804 return false; 805 } 806 return true; 807 } 808 809 static bool hfp_ag_voice_recognition_session_active(hfp_connection_t * hfp_connection){ 810 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED || hfp_connection->state > HFP_AUDIO_CONNECTION_ESTABLISHED){ 811 return false; 812 } 813 if (hfp_connection->vra_state != HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 814 if (hfp_connection->vra_state == HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 815 return true; 816 } 817 return false; 818 } 819 return true; 820 } 821 822 static bool hfp_ag_is_audio_connection_active(hfp_connection_t * hfp_connection){ 823 switch (hfp_connection->state){ 824 case HFP_W2_CONNECT_SCO: 825 case HFP_W4_SCO_CONNECTED: 826 case HFP_AUDIO_CONNECTION_ESTABLISHED: 827 return true; 828 default: 829 return false; 830 } 831 } 832 833 static void hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection_t * hfp_connection, uint8_t status){ 834 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 835 836 uint8_t event[6]; 837 event[0] = HCI_EVENT_HFP_META; 838 event[1] = sizeof(event) - 2; 839 event[2] = HFP_SUBEVENT_ENHANCED_VOICE_RECOGNITION_AG_MESSAGE_SENT; 840 little_endian_store_16(event, 3, acl_handle); 841 event[5] = status; 842 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 843 } 844 845 846 static void hfp_ag_emit_hf_indicator_value(hfp_connection_t * hfp_connection, uint16_t uuid, uint8_t value){ 847 hci_con_handle_t acl_handle = (hfp_connection != NULL) ? hfp_connection->acl_handle : HCI_CON_HANDLE_INVALID; 848 849 uint8_t event[8]; 850 event[0] = HCI_EVENT_HFP_META; 851 event[1] = sizeof(event) - 2; 852 event[2] = HFP_SUBEVENT_HF_INDICATOR; 853 little_endian_store_16(event, 3, acl_handle); 854 little_endian_store_16(event, 5, uuid); 855 event[7] = value; 856 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 857 } 858 859 static void hfp_ag_emit_general_simple_event(uint8_t event_subtype){ 860 if (!hfp_ag_callback) return; 861 862 uint8_t event[5]; 863 event[0] = HCI_EVENT_HFP_META; 864 event[1] = sizeof(event) - 2; 865 event[2] = event_subtype; 866 little_endian_store_16(event, 3, HCI_CON_HANDLE_INVALID); 867 (*hfp_ag_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 868 } 869 870 // @return status 871 static uint8_t hfp_ag_vra_state_machine_two(hfp_connection_t * hfp_connection){ 872 uint8_t status = ERROR_CODE_SUCCESS; 873 switch (hfp_connection->vra_state_requested){ 874 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO: 875 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 876 status = hfp_ag_setup_audio_connection(hfp_connection); 877 if (status != ERROR_CODE_SUCCESS){ 878 hfp_connection->vra_state_requested = hfp_connection->vra_state; 879 hfp_emit_voice_recognition_enabled(hfp_connection, status); 880 break; 881 } 882 } 883 hfp_connection->enhanced_voice_recognition_enabled = true; 884 hfp_connection->vra_state = HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 885 hfp_connection->vra_state_requested = hfp_connection->vra_state; 886 hfp_emit_enhanced_voice_recognition_hf_ready_for_audio_event(hfp_connection, ERROR_CODE_SUCCESS); 887 break; 888 889 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 890 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_OFF; 891 hfp_connection->vra_state_requested = hfp_connection->vra_state; 892 893 // release audio connection only if it was opened after audio VR activated 894 if (hfp_ag_is_audio_connection_active(hfp_connection) && !hfp_connection->ag_audio_connection_opened_before_vra){ 895 hfp_trigger_release_audio_connection(hfp_connection); 896 } 897 898 hfp_emit_voice_recognition_disabled(hfp_connection, ERROR_CODE_SUCCESS); 899 break; 900 901 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 902 // open only if audio connection does not already exist 903 if (!hfp_ag_is_audio_connection_active(hfp_connection)){ 904 status = hfp_ag_setup_audio_connection(hfp_connection); 905 if (status != ERROR_CODE_SUCCESS){ 906 hfp_connection->vra_state_requested = hfp_connection->vra_state; 907 hfp_emit_voice_recognition_enabled(hfp_connection, status); 908 break; 909 } 910 } 911 912 hfp_connection->vra_state = HFP_VRA_VOICE_RECOGNITION_ACTIVATED; 913 hfp_connection->vra_state_requested = hfp_connection->vra_state; 914 hfp_connection->enhanced_voice_recognition_enabled = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 915 916 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 917 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 918 } else { 919 hfp_connection->emit_vra_enabled_after_audio_established = true; 920 } 921 break; 922 923 default: 924 break; 925 } 926 return status; 927 } 928 929 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 930 uint8_t done = 0; 931 uint8_t status; 932 933 switch (hfp_connection->vra_state_requested){ 934 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 935 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 936 if (done == 0){ 937 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 938 } else { 939 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 940 } 941 hfp_connection->vra_state_requested = hfp_connection->vra_state; 942 return done; 943 944 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 945 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 946 if (done == 0){ 947 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 948 } else { 949 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 950 } 951 hfp_connection->vra_state_requested = hfp_connection->vra_state; 952 return done; 953 954 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 955 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 956 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 957 if (done == 0){ 958 hfp_connection->vra_state_requested = hfp_connection->vra_state; 959 960 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 961 hfp_emit_voice_recognition_enabled(hfp_connection, done); 962 } else { 963 hfp_emit_voice_recognition_disabled(hfp_connection, done); 964 } 965 return 0; 966 } 967 status = hfp_ag_vra_state_machine_two(hfp_connection); 968 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 969 970 default: 971 log_error("state %u", hfp_connection->vra_state_requested); 972 btstack_assert(false); 973 return 0; 974 } 975 } 976 977 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 978 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 979 return 0; 980 } 981 int done = 0; 982 uint8_t status; 983 984 // VRA action initiated by AG 985 if (hfp_connection->ag_vra_send_command){ 986 hfp_connection->ag_vra_send_command = false; 987 return hfp_ag_vra_send_command(hfp_connection); 988 } 989 990 if (hfp_connection->ag_vra_requested_by_hf){ 991 hfp_connection->ag_vra_requested_by_hf = false; 992 993 // HF initiatied voice recognition, parser extracted activation value 994 switch (hfp_connection->ag_activate_voice_recognition_value){ 995 case 0: 996 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 997 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 998 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 999 } 1000 break; 1001 1002 case 1: 1003 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 1004 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 1005 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1006 } 1007 break; 1008 1009 case 2: 1010 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1011 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1012 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1013 } 1014 break; 1015 default: 1016 break; 1017 } 1018 if (done == 0){ 1019 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1020 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1021 return 1; 1022 } 1023 1024 status = hfp_ag_vra_state_machine_two(hfp_connection); 1025 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 1026 } 1027 1028 return 0; 1029 } 1030 1031 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1032 int sent = codecs_exchange_state_machine(hfp_connection); 1033 if (sent) return 1; 1034 1035 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1036 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1037 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1038 return 1; 1039 } 1040 1041 switch(hfp_connection->command){ 1042 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1043 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1044 return 1; 1045 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1046 if (hfp_connection->network_operator.format != 0){ 1047 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1048 } else { 1049 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1050 } 1051 return 1; 1052 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1053 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1054 return 1; 1055 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1056 if (hfp_connection->extended_audio_gateway_error){ 1057 hfp_connection->extended_audio_gateway_error = 0; 1058 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1059 return 1; 1060 } 1061 break; 1062 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1063 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1064 return 1; 1065 default: 1066 break; 1067 } 1068 return 0; 1069 } 1070 1071 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1072 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1073 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1074 1075 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1076 1077 if (hfp_connection->release_audio_connection){ 1078 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1079 hfp_connection->release_audio_connection = 0; 1080 gap_disconnect(hfp_connection->sco_handle); 1081 return 1; 1082 } 1083 1084 // accept incoming audio connection (codec negotiation is not used) 1085 if (hfp_connection->accept_sco){ 1086 // notify about codec selection if not done already 1087 if (hfp_connection->negotiated_codec == 0){ 1088 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1089 } 1090 // 1091 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1092 hfp_connection->accept_sco = 0; 1093 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1094 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1095 return 1; 1096 } 1097 1098 // run codecs exchange 1099 int sent = codecs_exchange_state_machine(hfp_connection); 1100 if (sent) return 1; 1101 1102 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1103 if (hfp_connection->establish_audio_connection){ 1104 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1105 hfp_connection->establish_audio_connection = 0; 1106 hfp_setup_synchronous_connection(hfp_connection); 1107 return 1; 1108 } 1109 return 0; 1110 } 1111 1112 static void hfp_ag_set_callsetup_indicator(void){ 1113 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1114 if (!indicator){ 1115 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1116 return; 1117 }; 1118 indicator->status = hfp_gsm_callsetup_status(); 1119 } 1120 1121 static void hfp_ag_set_callheld_indicator(void){ 1122 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1123 if (!indicator){ 1124 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1125 return; 1126 }; 1127 indicator->status = hfp_gsm_callheld_status(); 1128 } 1129 1130 // 1131 // transition implementations for hfp_ag_call_state_machine 1132 // 1133 1134 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1135 if (use_in_band_tone()){ 1136 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1137 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1138 } else { 1139 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1140 } 1141 } 1142 1143 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1144 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1145 } 1146 1147 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1148 hfp_connection->ag_ring = 0; 1149 hfp_connection->ag_send_clip = 0; 1150 } 1151 1152 1153 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1154 btstack_linked_list_iterator_t it; 1155 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1156 while (btstack_linked_list_iterator_has_next(&it)){ 1157 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1158 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1159 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1160 1161 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1162 hfp_ag_run_for_context(hfp_connection); 1163 } 1164 } 1165 1166 static void hfp_ag_trigger_ring_and_clip(void) { 1167 btstack_linked_list_iterator_t it; 1168 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1169 while (btstack_linked_list_iterator_has_next(&it)){ 1170 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1171 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1172 switch (hfp_connection->call_state){ 1173 case HFP_CALL_INCOMING_RINGING: 1174 case HFP_CALL_OUTGOING_RINGING: 1175 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1176 // Queue RING on this connection 1177 hfp_connection->ag_ring = 1; 1178 1179 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1180 // "If the calling subscriber number information is available from the network, the AG shall issue the 1181 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1182 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1183 1184 // trigger next message 1185 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1186 break; 1187 default: 1188 break; 1189 } 1190 } 1191 } 1192 1193 // trigger RING and CLIP messages on connections that are ringing 1194 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1195 hfp_ag_trigger_ring_and_clip(); 1196 1197 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1198 btstack_run_loop_add_timer(timer); 1199 } 1200 1201 static void hfp_ag_ring_timeout_stop(void){ 1202 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1203 } 1204 1205 static void hfp_ag_start_ringing(void){ 1206 // setup ring timer 1207 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1208 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1209 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1210 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1211 1212 // emit start ringing 1213 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1214 1215 // send initial RING + CLIP 1216 hfp_ag_trigger_ring_and_clip(); 1217 } 1218 1219 static void hfp_ag_stop_ringing(void){ 1220 hfp_ag_ring_timeout_stop(); 1221 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1222 1223 btstack_linked_list_iterator_t it; 1224 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1225 while (btstack_linked_list_iterator_has_next(&it)){ 1226 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1227 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1228 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1229 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1230 hfp_ag_hf_stop_ringing(hfp_connection); 1231 } 1232 } 1233 1234 static void hfp_ag_trigger_incoming_call_idle(void){ 1235 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1236 if (indicator_index < 0) return; 1237 1238 // update callsetup state in connections 1239 btstack_linked_list_iterator_t it; 1240 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1241 while (btstack_linked_list_iterator_has_next(&it)){ 1242 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1243 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1244 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1245 1246 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1247 1248 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1249 1250 hfp_ag_run_for_context(hfp_connection); 1251 } 1252 1253 // start local ringing - started after connection state has been updated 1254 hfp_ag_start_ringing(); 1255 } 1256 1257 static void hfp_ag_trigger_outgoing_call(void){ 1258 btstack_linked_list_iterator_t it; 1259 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1260 while (btstack_linked_list_iterator_has_next(&it)){ 1261 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1262 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1263 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1264 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1265 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1266 } 1267 } 1268 } 1269 1270 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1271 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1272 1273 // trigger callsetup to be 1274 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1275 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1276 1277 int indicator_index ; 1278 1279 hfp_ag_set_callsetup_indicator(); 1280 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1281 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1282 1283 // put current call on hold if active 1284 if (put_call_on_hold){ 1285 log_info("AG putting current call on hold for new outgoing call"); 1286 hfp_ag_set_callheld_indicator(); 1287 indicator_index = get_ag_indicator_index_for_name("callheld"); 1288 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1289 } 1290 1291 // start audio if needed 1292 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1293 } 1294 1295 static void hfp_ag_transfer_indicator(const char * name){ 1296 int indicator_index = get_ag_indicator_index_for_name(name); 1297 if (indicator_index < 0) return; 1298 1299 btstack_linked_list_iterator_t it; 1300 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1301 while (btstack_linked_list_iterator_has_next(&it)){ 1302 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1303 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1304 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1305 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1306 hfp_ag_run_for_context(hfp_connection); 1307 } 1308 } 1309 1310 static void hfp_ag_transfer_callsetup_state(void){ 1311 hfp_ag_transfer_indicator("callsetup"); 1312 } 1313 1314 static void hfp_ag_transfer_call_state(void){ 1315 hfp_ag_transfer_indicator("call"); 1316 } 1317 1318 static void hfp_ag_transfer_callheld_state(void){ 1319 hfp_ag_transfer_indicator("callheld"); 1320 } 1321 1322 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1323 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1324 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1325 1326 hfp_ag_stop_ringing(); 1327 1328 btstack_linked_list_iterator_t it; 1329 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1330 while (btstack_linked_list_iterator_has_next(&it)){ 1331 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1332 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1333 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1334 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1335 1336 if (hfp_connection == source){ 1337 1338 if (use_in_band_tone()){ 1339 hfp_connection->call_state = HFP_CALL_ACTIVE; 1340 } else { 1341 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1342 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1343 } 1344 1345 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1346 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1347 1348 } else { 1349 hfp_connection->call_state = HFP_CALL_IDLE; 1350 } 1351 hfp_ag_run_for_context(hfp_connection); 1352 } 1353 } 1354 1355 static void hfp_ag_ag_accept_call(void){ 1356 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1357 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1358 1359 hfp_ag_stop_ringing(); 1360 1361 btstack_linked_list_iterator_t it; 1362 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1363 while (btstack_linked_list_iterator_has_next(&it)){ 1364 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1365 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1366 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1367 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1368 1369 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1370 1371 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1372 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1373 1374 hfp_ag_run_for_context(hfp_connection); 1375 break; // only single 1376 } 1377 } 1378 1379 static void hfp_ag_trigger_reject_call(void){ 1380 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1381 1382 hfp_ag_stop_ringing(); 1383 1384 btstack_linked_list_iterator_t it; 1385 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1386 while (btstack_linked_list_iterator_has_next(&it)){ 1387 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1388 if (connection->local_role != HFP_ROLE_AG) continue; 1389 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1390 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1391 1392 connection->call_state = HFP_CALL_IDLE; 1393 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1394 1395 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1396 connection->release_audio_connection = 1; 1397 } 1398 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1399 hfp_ag_run_for_context(connection); 1400 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1401 } 1402 } 1403 1404 static void hfp_ag_trigger_terminate_call(void){ 1405 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1406 1407 // no ringing during call 1408 1409 btstack_linked_list_iterator_t it; 1410 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1411 while (btstack_linked_list_iterator_has_next(&it)){ 1412 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1413 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1414 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1415 1416 hfp_connection->call_state = HFP_CALL_IDLE; 1417 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1418 1419 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1420 hfp_connection->release_audio_connection = 1; 1421 } 1422 1423 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1424 hfp_ag_run_for_context(hfp_connection); 1425 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1426 } 1427 } 1428 1429 static void hfp_ag_set_call_indicator(void){ 1430 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1431 if (!indicator){ 1432 log_error("hfp_ag_set_call_state: call indicator is missing"); 1433 return; 1434 }; 1435 indicator->status = hfp_gsm_call_status(); 1436 } 1437 1438 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1439 btstack_linked_list_iterator_t it; 1440 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1441 while (btstack_linked_list_iterator_has_next(&it)){ 1442 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1443 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1444 if (hfp_connection->call_state == call_state) return hfp_connection; 1445 } 1446 return NULL; 1447 } 1448 1449 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1450 btstack_linked_list_iterator_t it; 1451 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1452 while (btstack_linked_list_iterator_has_next(&it)){ 1453 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1454 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1455 hfp_connection->send_response_and_hold_status = state + 1; 1456 } 1457 } 1458 1459 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1460 int indicator_index; 1461 switch (hfp_connection->call_state){ 1462 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1463 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1464 // we got event: audio hfp_connection established 1465 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1466 break; 1467 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1468 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1469 // we got event: audio hfp_connection established 1470 hfp_connection->call_state = HFP_CALL_ACTIVE; 1471 break; 1472 case HFP_CALL_W2_SEND_CALL_WAITING: 1473 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1474 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1475 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1476 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1477 break; 1478 default: 1479 break; 1480 } 1481 return 0; 1482 } 1483 1484 // functions extracted from hfp_ag_call_sm below 1485 static void hfp_ag_handle_reject_outgoing_call(void){ 1486 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1487 if (!hfp_connection){ 1488 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1489 return; 1490 } 1491 1492 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1493 hfp_connection->call_state = HFP_CALL_IDLE; 1494 hfp_connection->send_error = 1; 1495 hfp_ag_run_for_context(hfp_connection); 1496 } 1497 1498 // hfp_connection is used to identify originating HF 1499 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1500 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1501 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1502 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1503 1504 switch (event){ 1505 case HFP_AG_INCOMING_CALL: 1506 switch (hfp_gsm_call_status()){ 1507 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1508 switch (hfp_gsm_callsetup_status()){ 1509 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1510 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1511 hfp_ag_set_callsetup_indicator(); 1512 hfp_ag_trigger_incoming_call_idle(); 1513 log_info("AG rings"); 1514 break; 1515 default: 1516 break; 1517 } 1518 break; 1519 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1520 switch (hfp_gsm_callsetup_status()){ 1521 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1522 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1523 hfp_ag_set_callsetup_indicator(); 1524 hfp_ag_trigger_incoming_call_during_active_one(); 1525 log_info("AG call waiting"); 1526 break; 1527 default: 1528 break; 1529 } 1530 break; 1531 default: 1532 break; 1533 } 1534 break; 1535 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1536 switch (hfp_gsm_call_status()){ 1537 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1538 switch (hfp_gsm_callsetup_status()){ 1539 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1540 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1541 hfp_ag_set_call_indicator(); 1542 hfp_ag_set_callsetup_indicator(); 1543 hfp_ag_ag_accept_call(); 1544 log_info("AG answers call, accept call by GSM"); 1545 break; 1546 default: 1547 break; 1548 } 1549 break; 1550 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1551 switch (hfp_gsm_callsetup_status()){ 1552 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1553 log_info("AG: current call is placed on hold, incoming call gets active"); 1554 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1555 hfp_ag_set_callsetup_indicator(); 1556 hfp_ag_set_callheld_indicator(); 1557 hfp_ag_transfer_callsetup_state(); 1558 hfp_ag_transfer_callheld_state(); 1559 break; 1560 default: 1561 break; 1562 } 1563 break; 1564 default: 1565 break; 1566 } 1567 break; 1568 1569 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1570 switch (hfp_gsm_call_status()){ 1571 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1572 switch (hfp_gsm_callheld_status()){ 1573 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1574 log_info("AG: joining held call with active call"); 1575 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1576 hfp_ag_set_callheld_indicator(); 1577 hfp_ag_transfer_callheld_state(); 1578 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1579 break; 1580 default: 1581 break; 1582 } 1583 break; 1584 default: 1585 break; 1586 } 1587 break; 1588 1589 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1590 switch (hfp_gsm_call_status()){ 1591 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1592 switch (hfp_gsm_callsetup_status()){ 1593 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1594 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1595 hfp_ag_set_callsetup_indicator(); 1596 hfp_ag_set_call_indicator(); 1597 hfp_ag_hf_accept_call(hfp_connection); 1598 hfp_connection->ok_pending = 1; 1599 log_info("HF answers call, accept call by GSM"); 1600 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1601 break; 1602 default: 1603 break; 1604 } 1605 break; 1606 default: 1607 break; 1608 } 1609 break; 1610 1611 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1612 switch (hfp_gsm_call_status()){ 1613 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1614 switch (hfp_gsm_callsetup_status()){ 1615 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1616 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1617 hfp_ag_response_and_hold_active = true; 1618 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1619 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1620 // as with regular call 1621 hfp_ag_set_call_indicator(); 1622 hfp_ag_set_callsetup_indicator(); 1623 hfp_ag_ag_accept_call(); 1624 log_info("AG response and hold - hold by AG"); 1625 break; 1626 default: 1627 break; 1628 } 1629 break; 1630 default: 1631 break; 1632 } 1633 break; 1634 1635 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1636 switch (hfp_gsm_call_status()){ 1637 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1638 switch (hfp_gsm_callsetup_status()){ 1639 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1640 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1641 hfp_ag_response_and_hold_active = true; 1642 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1643 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1644 // as with regular call 1645 hfp_ag_set_call_indicator(); 1646 hfp_ag_set_callsetup_indicator(); 1647 hfp_ag_hf_accept_call(hfp_connection); 1648 log_info("AG response and hold - hold by HF"); 1649 break; 1650 default: 1651 break; 1652 } 1653 break; 1654 default: 1655 break; 1656 } 1657 break; 1658 1659 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1660 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1661 if (!hfp_ag_response_and_hold_active) break; 1662 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1663 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1664 hfp_ag_response_and_hold_active = false; 1665 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1666 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1667 log_info("Held Call accepted and active"); 1668 break; 1669 1670 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1671 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1672 if (!hfp_ag_response_and_hold_active) break; 1673 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1674 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1675 hfp_ag_response_and_hold_active = false; 1676 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1677 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1678 // from terminate by ag 1679 hfp_ag_set_call_indicator(); 1680 hfp_ag_trigger_terminate_call(); 1681 break; 1682 1683 case HFP_AG_TERMINATE_CALL_BY_HF: 1684 switch (hfp_gsm_call_status()){ 1685 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1686 switch (hfp_gsm_callsetup_status()){ 1687 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1688 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1689 hfp_ag_set_callsetup_indicator(); 1690 hfp_ag_transfer_callsetup_state(); 1691 hfp_ag_trigger_reject_call(); 1692 log_info("HF Rejected Incoming call, AG terminate call"); 1693 break; 1694 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1695 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1696 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1697 hfp_ag_set_callsetup_indicator(); 1698 hfp_ag_transfer_callsetup_state(); 1699 log_info("AG terminate outgoing call process"); 1700 break; 1701 default: 1702 break; 1703 } 1704 break; 1705 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1706 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1707 hfp_ag_set_callsetup_indicator(); 1708 hfp_ag_set_call_indicator(); 1709 hfp_ag_trigger_terminate_call(); 1710 log_info("AG terminate call"); 1711 break; 1712 default: 1713 break; 1714 } 1715 break; 1716 1717 case HFP_AG_TERMINATE_CALL_BY_AG: 1718 switch (hfp_gsm_call_status()){ 1719 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1720 switch (hfp_gsm_callsetup_status()){ 1721 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1722 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1723 hfp_ag_set_callsetup_indicator(); 1724 hfp_ag_trigger_reject_call(); 1725 log_info("AG Rejected Incoming call, AG terminate call"); 1726 break; 1727 default: 1728 break; 1729 } 1730 break; 1731 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1732 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1733 hfp_ag_set_callsetup_indicator(); 1734 hfp_ag_set_call_indicator(); 1735 hfp_ag_trigger_terminate_call(); 1736 log_info("AG terminate call"); 1737 break; 1738 default: 1739 break; 1740 } 1741 break; 1742 case HFP_AG_CALL_DROPPED: 1743 switch (hfp_gsm_call_status()){ 1744 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1745 switch (hfp_gsm_callsetup_status()){ 1746 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1747 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1748 hfp_ag_stop_ringing(); 1749 break; 1750 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1751 log_info("Outgoing call interrupted\n"); 1752 break; 1753 default: 1754 break; 1755 } 1756 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1757 hfp_ag_set_callsetup_indicator(); 1758 hfp_ag_transfer_callsetup_state(); 1759 hfp_ag_trigger_terminate_call(); 1760 break; 1761 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1762 if (hfp_ag_response_and_hold_active) { 1763 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1764 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1765 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1766 } 1767 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1768 hfp_ag_set_callsetup_indicator(); 1769 hfp_ag_set_call_indicator(); 1770 hfp_ag_trigger_terminate_call(); 1771 log_info("AG notify call dropped"); 1772 break; 1773 default: 1774 break; 1775 } 1776 break; 1777 1778 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1779 // directly reject call if number of free slots is exceeded 1780 if (!hfp_gsm_call_possible()){ 1781 hfp_connection->send_error = 1; 1782 hfp_ag_run_for_context(hfp_connection); 1783 break; 1784 } 1785 1786 // note: number not used currently 1787 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1788 1789 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1790 1791 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1792 break; 1793 1794 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1795 // directly reject call if number of free slots is exceeded 1796 if (!hfp_gsm_call_possible()) { 1797 // TODO: no error for user 1798 break; 1799 } 1800 switch (hfp_gsm_call_status()) { 1801 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1802 switch (hfp_gsm_callsetup_status()) { 1803 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1804 // note: number not used currently 1805 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1806 // init call state for all connections 1807 hfp_ag_trigger_outgoing_call(); 1808 // get first one and accept call 1809 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1810 if (hfp_connection) { 1811 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1812 } 1813 break; 1814 default: 1815 // TODO: no error for user 1816 break; 1817 } 1818 break; 1819 default: 1820 // TODO: no error for user 1821 break; 1822 } 1823 break; 1824 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1825 // directly reject call if number of free slots is exceeded 1826 if (!hfp_gsm_call_possible()){ 1827 hfp_connection->send_error = 1; 1828 hfp_ag_run_for_context(hfp_connection); 1829 break; 1830 } 1831 1832 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1833 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1834 1835 log_info("Redial last number"); 1836 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1837 1838 if (strlen(last_dialed_number) > 0){ 1839 log_info("Last number exists: accept call"); 1840 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1841 } else { 1842 log_info("log_infoLast number missing: reject call"); 1843 hfp_ag_handle_reject_outgoing_call(); 1844 } 1845 break; 1846 } 1847 case HFP_AG_OUTGOING_CALL_REJECTED: 1848 hfp_ag_handle_reject_outgoing_call(); 1849 break; 1850 1851 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1852 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1853 if (!hfp_connection){ 1854 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1855 break; 1856 } 1857 1858 hfp_connection->ok_pending = 1; 1859 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1860 break; 1861 } 1862 case HFP_AG_OUTGOING_CALL_RINGING: 1863 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1864 if (!hfp_connection){ 1865 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1866 break; 1867 } 1868 1869 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1870 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1871 hfp_ag_set_callsetup_indicator(); 1872 hfp_ag_transfer_callsetup_state(); 1873 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1874 break; 1875 1876 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1877 // get outgoing call 1878 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1879 if (!hfp_connection){ 1880 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1881 } 1882 if (!hfp_connection){ 1883 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1884 break; 1885 } 1886 1887 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1888 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1889 hfp_connection->call_state = HFP_CALL_ACTIVE; 1890 hfp_ag_set_callsetup_indicator(); 1891 hfp_ag_set_call_indicator(); 1892 hfp_ag_transfer_call_state(); 1893 hfp_ag_transfer_callsetup_state(); 1894 if (callheld_status_call_on_hold_and_no_active_calls){ 1895 hfp_ag_set_callheld_indicator(); 1896 hfp_ag_transfer_callheld_state(); 1897 } 1898 hfp_ag_hf_stop_ringing(hfp_connection); 1899 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1900 break; 1901 } 1902 1903 case HFP_AG_CALL_HOLD_USER_BUSY: 1904 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1905 hfp_ag_set_callsetup_indicator(); 1906 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1907 hfp_connection->call_state = HFP_CALL_ACTIVE; 1908 log_info("AG: Call Waiting, User Busy"); 1909 break; 1910 1911 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1912 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1913 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1914 1915 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1916 if (call_held || call_setup_in_progress){ 1917 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1918 0, NULL); 1919 1920 } 1921 1922 if (call_setup_in_progress){ 1923 log_info("AG: Call Dropped, Accept new call"); 1924 hfp_ag_set_callsetup_indicator(); 1925 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1926 } else { 1927 log_info("AG: Call Dropped, Resume held call"); 1928 } 1929 if (call_held){ 1930 hfp_ag_set_callheld_indicator(); 1931 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1932 } 1933 1934 hfp_connection->call_state = HFP_CALL_ACTIVE; 1935 break; 1936 } 1937 1938 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1939 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1940 // only update if callsetup changed 1941 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1942 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1943 NULL); 1944 1945 if (call_setup_in_progress){ 1946 log_info("AG: Call on Hold, Accept new call"); 1947 hfp_ag_set_callsetup_indicator(); 1948 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1949 } else { 1950 log_info("AG: Swap calls"); 1951 } 1952 1953 hfp_ag_set_callheld_indicator(); 1954 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1955 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1956 hfp_connection->call_state = HFP_CALL_ACTIVE; 1957 break; 1958 } 1959 1960 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1961 // Adds a held call to the conversation. 1962 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1963 log_info("AG: Join 3-way-call"); 1964 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1965 hfp_ag_set_callheld_indicator(); 1966 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1967 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1968 } 1969 hfp_connection->call_state = HFP_CALL_ACTIVE; 1970 break; 1971 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1972 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1973 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1974 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1975 hfp_ag_set_call_indicator(); 1976 hfp_ag_set_callheld_indicator(); 1977 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1978 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1979 hfp_connection->call_state = HFP_CALL_IDLE; 1980 break; 1981 1982 default: 1983 break; 1984 } 1985 1986 1987 } 1988 1989 1990 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 1991 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 1992 if (!active_call) return; 1993 1994 int idx = active_call->index; 1995 hfp_enhanced_call_dir_t dir = active_call->direction; 1996 hfp_enhanced_call_status_t status = active_call->enhanced_status; 1997 hfp_enhanced_call_mode_t mode = active_call->mode; 1998 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 1999 uint8_t type = active_call->clip_type; 2000 char * number = active_call->clip_number; 2001 2002 char buffer[100]; 2003 // TODO: check length of a buffer, to fit the MTU 2004 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2005 if (number){ 2006 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2007 } 2008 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2009 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, 2010 mode, mpty, type, number); 2011 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2012 } 2013 2014 // sends pending command, returns if command was sent 2015 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2016 if (hfp_connection->send_status_of_current_calls){ 2017 hfp_connection->ok_pending = 0; 2018 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2019 hfp_connection->next_call_index++; 2020 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2021 return 1; 2022 } else { 2023 // 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 2024 hfp_connection->next_call_index = 0; 2025 hfp_connection->ok_pending = 1; 2026 hfp_connection->send_status_of_current_calls = 0; 2027 } 2028 } 2029 2030 if (hfp_connection->ag_notify_incoming_call_waiting){ 2031 hfp_connection->ag_notify_incoming_call_waiting = 0; 2032 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2033 return 1; 2034 } 2035 2036 if (hfp_connection->send_error){ 2037 hfp_connection->send_error = 0; 2038 hfp_connection->command = HFP_CMD_NONE; 2039 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2040 return 1; 2041 } 2042 2043 // note: before update AG indicators and ok_pending 2044 if (hfp_connection->send_response_and_hold_status){ 2045 int status = hfp_connection->send_response_and_hold_status - 1; 2046 hfp_connection->send_response_and_hold_status = 0; 2047 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2048 return 1; 2049 } 2050 2051 if (hfp_connection->ok_pending){ 2052 hfp_connection->ok_pending = 0; 2053 hfp_connection->command = HFP_CMD_NONE; 2054 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2055 return 1; 2056 } 2057 2058 // update AG indicators 2059 if (hfp_connection->ag_indicators_status_update_bitmap){ 2060 int i; 2061 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2062 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2063 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2064 if (!hfp_connection->enable_status_update_for_ag_indicators) { 2065 log_info("+CMER:3,0,0,0 - not sending update for '%s'", hfp_ag_indicators[i].name); 2066 break; 2067 } 2068 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2069 return 1; 2070 } 2071 } 2072 } 2073 2074 if (hfp_connection->ag_send_no_carrier){ 2075 hfp_connection->ag_send_no_carrier = false; 2076 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2077 return 1; 2078 } 2079 2080 // delay RING/CLIP until audio connection has been established for incoming calls 2081 // hfp_ag_hf_trigger_ring_and_clip is called in call_setup_state_machine 2082 if (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING){ 2083 if (hfp_connection->ag_ring){ 2084 hfp_connection->ag_ring = 0; 2085 hfp_connection->command = HFP_CMD_NONE; 2086 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2087 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2088 return 1; 2089 } 2090 2091 if (hfp_connection->ag_send_clip){ 2092 hfp_connection->ag_send_clip = 0; 2093 hfp_connection->command = HFP_CMD_NONE; 2094 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2095 return 1; 2096 } 2097 } 2098 2099 if (hfp_connection->send_phone_number_for_voice_tag){ 2100 hfp_connection->send_phone_number_for_voice_tag = 0; 2101 hfp_connection->command = HFP_CMD_NONE; 2102 hfp_connection->ok_pending = 1; 2103 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2104 return 1; 2105 } 2106 2107 if (hfp_connection->send_subscriber_number){ 2108 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2109 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2110 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2111 } else { 2112 hfp_connection->send_subscriber_number = 0; 2113 hfp_connection->next_subscriber_number_to_send = 0; 2114 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2115 } 2116 hfp_connection->command = HFP_CMD_NONE; 2117 return 1; 2118 } 2119 2120 if (hfp_connection->send_microphone_gain){ 2121 hfp_connection->send_microphone_gain = 0; 2122 hfp_connection->command = HFP_CMD_NONE; 2123 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2124 return 1; 2125 } 2126 2127 if (hfp_connection->send_speaker_gain){ 2128 hfp_connection->send_speaker_gain = 0; 2129 hfp_connection->command = HFP_CMD_NONE; 2130 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2131 return 1; 2132 } 2133 2134 if (hfp_connection->send_ag_status_indicators){ 2135 hfp_connection->send_ag_status_indicators = 0; 2136 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2137 return 1; 2138 } 2139 2140 return 0; 2141 } 2142 2143 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2144 2145 btstack_assert(hfp_connection != NULL); 2146 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2147 2148 // during SDP query, RFCOMM CID is not set 2149 if (hfp_connection->rfcomm_cid == 0) return; 2150 2151 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED && hfp_connection->emit_vra_enabled_after_audio_established){ 2152 hfp_connection->emit_vra_enabled_after_audio_established = false; 2153 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 2154 } 2155 2156 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2157 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2158 hfp_connection->release_audio_connection = 0; 2159 gap_disconnect(hfp_connection->sco_handle); 2160 return; 2161 } 2162 2163 // configure NBS/WBS if needed using vendor-specific HCI commands 2164 if (hci_can_send_command_packet_now()) { 2165 #ifdef ENABLE_CC256X_ASSISTED_HFP 2166 // WBS Disassociate 2167 if (hfp_connection->cc256x_send_wbs_disassociate){ 2168 hfp_connection->cc256x_send_wbs_disassociate = false; 2169 hci_send_cmd(&hci_ti_wbs_disassociate); 2170 return; 2171 } 2172 // Write Codec Config 2173 if (hfp_connection->cc256x_send_write_codec_config){ 2174 hfp_connection->cc256x_send_write_codec_config = false; 2175 hfp_cc256x_write_codec_config(hfp_connection); 2176 return; 2177 } 2178 // WBS Associate 2179 if (hfp_connection->cc256x_send_wbs_associate){ 2180 hfp_connection->cc256x_send_wbs_associate = false; 2181 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2182 return; 2183 } 2184 #endif 2185 #ifdef ENABLE_BCM_PCM_WBS 2186 // Enable WBS 2187 if (hfp_connection->bcm_send_enable_wbs){ 2188 hfp_connection->bcm_send_enable_wbs = false; 2189 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2190 return; 2191 } 2192 // Write I2S/PCM params 2193 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2194 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2195 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2196 return; 2197 } 2198 // Disable WBS 2199 if (hfp_connection->bcm_send_disable_wbs){ 2200 hfp_connection->bcm_send_disable_wbs = false; 2201 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2202 return; 2203 } 2204 #endif 2205 #ifdef ENABLE_RTK_PCM_WBS 2206 // Configure CVSD vs. mSBC 2207 if (hfp_connection->rtk_send_sco_config){ 2208 hfp_connection->rtk_send_sco_config = false; 2209 if (hfp_connection->negotiated_codec == HFP_CODEC_MSBC){ 2210 log_info("RTK SCO: 16k + mSBC"); 2211 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x00, 0x00, 0x41); 2212 } else { 2213 log_info("RTK SCO: 16k + CVSD"); 2214 hci_send_cmd(&hci_rtk_configure_sco_routing, 0x81, 0x90, 0x00, 0x00, 0x1a, 0x0c, 0x0c, 0x00, 0x01); 2215 } 2216 return; 2217 } 2218 #endif 2219 } 2220 2221 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2222 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2223 hfp_finalize_connection_context(hfp_connection); 2224 return; 2225 } 2226 #endif 2227 2228 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2229 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2230 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2231 return; 2232 } 2233 2234 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2235 2236 if (!cmd_sent){ 2237 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2238 } 2239 2240 if (!cmd_sent){ 2241 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2242 } 2243 2244 if (!cmd_sent){ 2245 cmd_sent = call_setup_state_machine(hfp_connection); 2246 } 2247 2248 if (!cmd_sent){ 2249 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2250 } 2251 2252 if (!cmd_sent){ 2253 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2254 } 2255 2256 // disconnect 2257 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2258 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2259 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2260 } 2261 2262 if (cmd_sent){ 2263 hfp_connection->command = HFP_CMD_NONE; 2264 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2265 } 2266 } 2267 2268 static int hfp_parser_is_end_of_line(uint8_t byte){ 2269 return (byte == '\n') || (byte == '\r'); 2270 } 2271 2272 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2273 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2274 if (size < 1) return; 2275 uint8_t status = ERROR_CODE_SUCCESS; 2276 2277 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2278 #ifdef ENABLE_HFP_AT_MESSAGES 2279 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2280 #endif 2281 2282 // process messages byte-wise 2283 int pos; 2284 for (pos = 0; pos < size ; pos++){ 2285 hfp_parse(hfp_connection, packet[pos], 0); 2286 2287 // parse until end of line 2288 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2289 2290 hfp_generic_status_indicator_t * indicator; 2291 switch(hfp_connection->command){ 2292 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2293 hfp_connection->command = HFP_CMD_NONE; 2294 hfp_connection->ag_vra_requested_by_hf = true; 2295 break; 2296 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2297 hfp_connection->command = HFP_CMD_NONE; 2298 if (hfp_ag_response_and_hold_active){ 2299 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2300 } 2301 hfp_connection->ok_pending = 1; 2302 break; 2303 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2304 hfp_connection->command = HFP_CMD_NONE; 2305 switch(hfp_connection->ag_response_and_hold_action){ 2306 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2307 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2308 break; 2309 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2310 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2311 break; 2312 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2313 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2314 break; 2315 default: 2316 break; 2317 } 2318 hfp_connection->ok_pending = 1; 2319 break; 2320 case HFP_CMD_HF_INDICATOR_STATUS: 2321 hfp_connection->command = HFP_CMD_NONE; 2322 2323 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2324 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2325 switch (indicator->uuid){ 2326 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2327 if (hfp_connection->parser_indicator_value > 1) { 2328 hfp_connection->send_error = 1; 2329 break; 2330 } 2331 hfp_connection->ok_pending = 1; 2332 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2333 break; 2334 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2335 if (hfp_connection->parser_indicator_value > 100){ 2336 hfp_connection->send_error = 1; 2337 break; 2338 } 2339 hfp_connection->ok_pending = 1; 2340 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2341 break; 2342 default: 2343 hfp_connection->send_error = 1; 2344 break; 2345 } 2346 } else { 2347 hfp_connection->send_error = 1; 2348 } 2349 break; 2350 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2351 // expected by SLC state machine 2352 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2353 hfp_connection->send_ag_indicators_segment = 0; 2354 hfp_connection->send_ag_status_indicators = 1; 2355 break; 2356 case HFP_CMD_LIST_CURRENT_CALLS: 2357 hfp_connection->command = HFP_CMD_NONE; 2358 hfp_connection->next_call_index = 0; 2359 hfp_connection->send_status_of_current_calls = 1; 2360 break; 2361 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 2362 hfp_connection->command = HFP_CMD_NONE; 2363 if (hfp_ag_subscriber_numbers_count == 0){ 2364 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2365 break; 2366 } 2367 hfp_connection->next_subscriber_number_to_send = 0; 2368 hfp_connection->send_subscriber_number = 1; 2369 break; 2370 case HFP_CMD_TRANSMIT_DTMF_CODES: 2371 { 2372 hfp_connection->command = HFP_CMD_NONE; 2373 char buffer[2]; 2374 buffer[0] = (char) hfp_connection->ag_dtmf_code; 2375 buffer[1] = 0; 2376 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_TRANSMIT_DTMF_CODES, buffer); 2377 break; 2378 } 2379 case HFP_CMD_HF_REQUEST_PHONE_NUMBER: 2380 hfp_connection->command = HFP_CMD_NONE; 2381 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_ATTACH_NUMBER_TO_VOICE_TAG); 2382 break; 2383 case HFP_CMD_TURN_OFF_EC_AND_NR: 2384 hfp_connection->command = HFP_CMD_NONE; 2385 2386 if (get_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION)){ 2387 hfp_connection->ok_pending = 1; 2388 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_EC_NR_FUNCTION, hfp_connection->ag_echo_and_noise_reduction); 2389 status = ERROR_CODE_SUCCESS; 2390 } else { 2391 hfp_connection->send_error = 1; 2392 status = ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2393 } 2394 hfp_emit_event(hfp_connection, HFP_SUBEVENT_ECHO_CANCELING_AND_NOISE_REDUCTION_DEACTIVATE, status); 2395 break; 2396 case HFP_CMD_CALL_ANSWERED: 2397 hfp_connection->command = HFP_CMD_NONE; 2398 log_info("HFP: ATA"); 2399 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, hfp_connection); 2400 break; 2401 case HFP_CMD_HANG_UP_CALL: 2402 hfp_connection->command = HFP_CMD_NONE; 2403 hfp_connection->ok_pending = 1; 2404 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_HF, hfp_connection); 2405 break; 2406 case HFP_CMD_CALL_HOLD: { 2407 hfp_connection->command = HFP_CMD_NONE; 2408 hfp_connection->ok_pending = 1; 2409 2410 switch (hfp_connection->ag_call_hold_action){ 2411 case 0: 2412 // Releases all held calls or sets User Determined User Busy (UDUB) for a waiting call. 2413 hfp_ag_call_sm(HFP_AG_CALL_HOLD_USER_BUSY, hfp_connection); 2414 break; 2415 case 1: 2416 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 2417 // Where both a held and a waiting call exist, the above procedures shall apply to the 2418 // waiting call (i.e., not to the held call) in conflicting situation. 2419 hfp_ag_call_sm(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2420 break; 2421 case 2: 2422 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 2423 // Where both a held and a waiting call exist, the above procedures shall apply to the 2424 // waiting call (i.e., not to the held call) in conflicting situation. 2425 hfp_ag_call_sm(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection); 2426 break; 2427 case 3: 2428 // Adds a held call to the conversation. 2429 hfp_ag_call_sm(HFP_AG_CALL_HOLD_ADD_HELD_CALL, hfp_connection); 2430 break; 2431 case 4: 2432 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer). 2433 hfp_ag_call_sm(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, hfp_connection); 2434 break; 2435 default: 2436 break; 2437 } 2438 hfp_connection->call_index = 0; 2439 break; 2440 } 2441 case HFP_CMD_CALL_PHONE_NUMBER: 2442 hfp_connection->command = HFP_CMD_NONE; 2443 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, hfp_connection); 2444 break; 2445 case HFP_CMD_REDIAL_LAST_NUMBER: 2446 hfp_connection->command = HFP_CMD_NONE; 2447 hfp_ag_call_sm(HFP_AG_OUTGOING_REDIAL_INITIATED, hfp_connection); 2448 break; 2449 case HFP_CMD_ENABLE_CLIP: 2450 hfp_connection->command = HFP_CMD_NONE; 2451 log_info("hfp: clip set, now: %u", hfp_connection->clip_enabled); 2452 hfp_connection->ok_pending = 1; 2453 break; 2454 case HFP_CMD_ENABLE_CALL_WAITING_NOTIFICATION: 2455 hfp_connection->command = HFP_CMD_NONE; 2456 log_info("hfp: call waiting notification set, now: %u", hfp_connection->call_waiting_notification_enabled); 2457 hfp_connection->ok_pending = 1; 2458 break; 2459 case HFP_CMD_SET_SPEAKER_GAIN: 2460 hfp_connection->command = HFP_CMD_NONE; 2461 hfp_connection->ok_pending = 1; 2462 log_info("HF speaker gain = %u", hfp_connection->speaker_gain); 2463 hfp_emit_event(hfp_connection, HFP_SUBEVENT_SPEAKER_VOLUME, hfp_connection->speaker_gain); 2464 break; 2465 case HFP_CMD_SET_MICROPHONE_GAIN: 2466 hfp_connection->command = HFP_CMD_NONE; 2467 hfp_connection->ok_pending = 1; 2468 log_info("HF microphone gain = %u", hfp_connection->microphone_gain); 2469 hfp_emit_event(hfp_connection, HFP_SUBEVENT_MICROPHONE_VOLUME, hfp_connection->microphone_gain); 2470 break; 2471 case HFP_CMD_UNKNOWN: 2472 hfp_connection->command = HFP_CMD_NONE; 2473 hfp_connection->send_error = 1; 2474 break; 2475 default: 2476 break; 2477 } 2478 } 2479 } 2480 2481 static void hfp_ag_run(void){ 2482 btstack_linked_list_iterator_t it; 2483 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2484 while (btstack_linked_list_iterator_has_next(&it)){ 2485 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2486 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2487 hfp_ag_run_for_context(hfp_connection); 2488 } 2489 } 2490 2491 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2492 hfp_connection_t * hfp_connection = NULL; 2493 switch (packet_type){ 2494 case RFCOMM_DATA_PACKET: 2495 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2496 btstack_assert(hfp_connection != NULL); 2497 2498 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2499 hfp_ag_run_for_context(hfp_connection); 2500 return; 2501 case HCI_EVENT_PACKET: 2502 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2503 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2504 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2505 btstack_assert(hfp_connection != NULL); 2506 2507 hfp_ag_run_for_context(hfp_connection); 2508 return; 2509 } 2510 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2511 break; 2512 default: 2513 break; 2514 } 2515 2516 hfp_ag_run(); 2517 } 2518 2519 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2520 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2521 hfp_ag_run(); 2522 } 2523 2524 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2525 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2526 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2527 return; 2528 } 2529 int i; 2530 hfp_ag_codecs_nr = codecs_nr; 2531 for (i=0; i < codecs_nr; i++){ 2532 hfp_ag_codecs[i] = codecs[i]; 2533 } 2534 } 2535 2536 void hfp_ag_init_supported_features(uint32_t supported_features){ 2537 hfp_ag_supported_features = supported_features; 2538 } 2539 2540 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2541 hfp_ag_indicators_nr = ag_indicators_nr; 2542 (void)memcpy(hfp_ag_indicators, ag_indicators, 2543 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2544 } 2545 2546 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2547 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2548 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2549 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2550 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2551 } 2552 2553 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2554 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2555 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2556 call_hold_services_nr * sizeof(char *)); 2557 } 2558 2559 2560 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2561 2562 hfp_init(); 2563 hfp_ag_call_hold_services_nr = 0; 2564 hfp_ag_response_and_hold_active = false; 2565 hfp_ag_indicators_nr = 0; 2566 hfp_ag_codecs_nr = 0; 2567 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2568 hfp_ag_subscriber_numbers = NULL; 2569 hfp_ag_subscriber_numbers_count = 0; 2570 2571 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2572 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2573 2574 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2575 2576 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2577 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2578 2579 hfp_gsm_init(); 2580 } 2581 2582 void hfp_ag_deinit(void){ 2583 hfp_deinit(); 2584 hfp_gsm_deinit(); 2585 2586 hfp_ag_callback = NULL; 2587 hfp_ag_supported_features = 0; 2588 hfp_ag_codecs_nr = 0; 2589 hfp_ag_indicators_nr = 0; 2590 hfp_ag_call_hold_services_nr = 0; 2591 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2592 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2593 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2594 hfp_ag_subscriber_numbers = NULL; 2595 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2596 } 2597 2598 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2599 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2600 } 2601 2602 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2603 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2604 if (!hfp_connection){ 2605 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2606 } 2607 2608 hfp_trigger_release_service_level_connection(hfp_connection); 2609 hfp_ag_run_for_context(hfp_connection); 2610 return ERROR_CODE_SUCCESS; 2611 } 2612 2613 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2614 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2615 if (!hfp_connection){ 2616 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2617 } 2618 2619 hfp_connection->extended_audio_gateway_error = 0; 2620 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2621 return ERROR_CODE_COMMAND_DISALLOWED; 2622 } 2623 2624 hfp_connection->extended_audio_gateway_error = error; 2625 hfp_ag_run_for_context(hfp_connection); 2626 return ERROR_CODE_SUCCESS; 2627 } 2628 2629 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2630 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2631 return ERROR_CODE_COMMAND_DISALLOWED; 2632 } 2633 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2634 return ERROR_CODE_COMMAND_DISALLOWED; 2635 } 2636 2637 hfp_connection->establish_audio_connection = 1; 2638 if (!has_codec_negotiation_feature(hfp_connection)){ 2639 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2640 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2641 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2642 // now, pick link settings 2643 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2644 #ifdef ENABLE_CC256X_ASSISTED_HFP 2645 hfp_cc256x_prepare_for_sco(hfp_connection); 2646 #endif 2647 return ERROR_CODE_SUCCESS; 2648 } 2649 2650 uint8_t i; 2651 bool codec_was_in_use = false; 2652 bool better_codec_can_be_used = false; 2653 2654 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2655 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2656 codec_was_in_use = true; 2657 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2658 better_codec_can_be_used = true; 2659 } 2660 } 2661 2662 if (!codec_was_in_use || better_codec_can_be_used){ 2663 hfp_connection->ag_send_common_codec = true; 2664 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2665 } 2666 return ERROR_CODE_SUCCESS; 2667 } 2668 2669 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2670 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2671 if (!hfp_connection){ 2672 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2673 } 2674 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2675 if (status != ERROR_CODE_SUCCESS){ 2676 return status; 2677 } 2678 hfp_ag_run_for_context(hfp_connection); 2679 return ERROR_CODE_SUCCESS; 2680 } 2681 2682 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2683 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2684 if (!hfp_connection){ 2685 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2686 } 2687 2688 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2689 return ERROR_CODE_COMMAND_DISALLOWED; 2690 } 2691 2692 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2693 if (status == ERROR_CODE_SUCCESS){ 2694 hfp_ag_run_for_context(hfp_connection); 2695 } 2696 return status; 2697 } 2698 2699 /** 2700 * @brief Enable in-band ring tone 2701 */ 2702 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2703 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2704 return; 2705 } 2706 2707 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2708 2709 btstack_linked_list_iterator_t it; 2710 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2711 while (btstack_linked_list_iterator_has_next(&it)){ 2712 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2713 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2714 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2715 hfp_ag_run_for_context(hfp_connection); 2716 } 2717 } 2718 2719 /** 2720 * @brief Called from GSM 2721 */ 2722 void hfp_ag_incoming_call(void){ 2723 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2724 } 2725 2726 void hfp_ag_outgoing_call_initiated(const char * number) { 2727 UNUSED(number); 2728 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2729 } 2730 2731 /** 2732 * @brief number is stored. 2733 */ 2734 void hfp_ag_set_clip(uint8_t type, const char * number){ 2735 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2736 } 2737 2738 void hfp_ag_call_dropped(void){ 2739 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2740 } 2741 2742 // call from AG UI 2743 void hfp_ag_answer_incoming_call(void){ 2744 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2745 } 2746 2747 void hfp_ag_join_held_call(void){ 2748 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2749 } 2750 2751 void hfp_ag_terminate_call(void){ 2752 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2753 } 2754 2755 void hfp_ag_outgoing_call_ringing(void){ 2756 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2757 } 2758 2759 void hfp_ag_outgoing_call_established(void){ 2760 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2761 } 2762 2763 void hfp_ag_outgoing_call_rejected(void){ 2764 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2765 } 2766 2767 void hfp_ag_outgoing_call_accepted(void){ 2768 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2769 } 2770 2771 void hfp_ag_hold_incoming_call(void){ 2772 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2773 } 2774 2775 void hfp_ag_accept_held_incoming_call(void) { 2776 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2777 } 2778 2779 void hfp_ag_reject_held_incoming_call(void){ 2780 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2781 } 2782 2783 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2784 int indicator_index = get_ag_indicator_index_for_name(name); 2785 if (indicator_index < 0) return; 2786 hfp_ag_indicators[indicator_index].status = value; 2787 2788 btstack_linked_list_iterator_t it; 2789 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2790 while (btstack_linked_list_iterator_has_next(&it)){ 2791 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2792 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2793 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2794 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2795 continue; 2796 } 2797 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2798 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2799 hfp_ag_run_for_context(hfp_connection); 2800 } 2801 } 2802 2803 uint8_t hfp_ag_set_registration_status(int registration_status){ 2804 if ((registration_status < 0) || (registration_status > 1)){ 2805 return ERROR_CODE_COMMAND_DISALLOWED; 2806 } 2807 2808 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2809 2810 // if network goes away wihle a call is active: 2811 // - the call gets dropped 2812 // - we send NO CARRIER 2813 // NOTE: the CALL=0 has to be sent before NO CARRIER 2814 2815 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2816 2817 btstack_linked_list_iterator_t it; 2818 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2819 while (btstack_linked_list_iterator_has_next(&it)){ 2820 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2821 hfp_connection->ag_send_no_carrier = true; 2822 } 2823 } 2824 hfp_ag_set_ag_indicator("service", registration_status); 2825 return ERROR_CODE_SUCCESS; 2826 } 2827 2828 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2829 if ((signal_strength < 0) || (signal_strength > 5)){ 2830 return ERROR_CODE_COMMAND_DISALLOWED; 2831 } 2832 2833 hfp_ag_set_ag_indicator("signal", signal_strength); 2834 return ERROR_CODE_SUCCESS; 2835 } 2836 2837 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2838 if ((roaming_status < 0) || (roaming_status > 1)){ 2839 return ERROR_CODE_COMMAND_DISALLOWED; 2840 } 2841 2842 hfp_ag_set_ag_indicator("roam", roaming_status); 2843 return ERROR_CODE_SUCCESS; 2844 } 2845 2846 uint8_t hfp_ag_set_battery_level(int battery_level){ 2847 if ((battery_level < 0) || (battery_level > 5)){ 2848 return ERROR_CODE_COMMAND_DISALLOWED; 2849 } 2850 hfp_ag_set_ag_indicator("battchg", battery_level); 2851 return ERROR_CODE_SUCCESS; 2852 } 2853 2854 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2855 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2856 if (!hfp_connection){ 2857 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2858 } 2859 2860 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2861 return ERROR_CODE_COMMAND_DISALLOWED; 2862 } 2863 2864 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2865 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2866 if (!enhanced_vra_supported && !legacy_vra_supported){ 2867 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2868 } 2869 2870 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2871 return ERROR_CODE_COMMAND_DISALLOWED; 2872 } 2873 2874 hfp_connection->ag_activate_voice_recognition_value = 1; 2875 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2876 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2877 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2878 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2879 hfp_connection->ag_vra_send_command = true; 2880 hfp_ag_run_for_context(hfp_connection); 2881 return ERROR_CODE_SUCCESS; 2882 } 2883 2884 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2885 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2886 if (!hfp_connection){ 2887 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2888 } 2889 2890 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2891 return ERROR_CODE_COMMAND_DISALLOWED; 2892 } 2893 2894 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2895 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2896 2897 if (!enhanced_vra_supported && !legacy_vra_supported){ 2898 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2899 } 2900 2901 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2902 return ERROR_CODE_COMMAND_DISALLOWED; 2903 } 2904 2905 hfp_connection->ag_activate_voice_recognition_value = 0; 2906 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2907 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2908 hfp_connection->ag_vra_send_command = true; 2909 hfp_ag_run_for_context(hfp_connection); 2910 return ERROR_CODE_SUCCESS; 2911 } 2912 2913 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2914 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2915 if (!hfp_connection){ 2916 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2917 } 2918 2919 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2920 return ERROR_CODE_COMMAND_DISALLOWED; 2921 } 2922 2923 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2924 return ERROR_CODE_COMMAND_DISALLOWED; 2925 } 2926 2927 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2928 return ERROR_CODE_COMMAND_DISALLOWED; 2929 } 2930 2931 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2932 if (!enhanced_vra_supported ){ 2933 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2934 } 2935 2936 2937 hfp_connection->ag_vra_state = state; 2938 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2939 hfp_connection->ag_vra_send_command = true; 2940 hfp_ag_run_for_context(hfp_connection); 2941 return ERROR_CODE_SUCCESS; 2942 } 2943 2944 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2945 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2946 } 2947 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2948 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2949 } 2950 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2951 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2952 } 2953 2954 2955 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){ 2956 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2957 if (!hfp_connection){ 2958 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2959 } 2960 2961 if (hfp_connection->emit_vra_enabled_after_audio_established){ 2962 return ERROR_CODE_COMMAND_DISALLOWED; 2963 } 2964 2965 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2966 return ERROR_CODE_COMMAND_DISALLOWED; 2967 } 2968 2969 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2970 return ERROR_CODE_COMMAND_DISALLOWED; 2971 } 2972 2973 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2974 if (!enhanced_vra_supported ){ 2975 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2976 } 2977 2978 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 2979 if (!enhanced_vra_msg_supported ){ 2980 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2981 } 2982 2983 uint16_t message_len = strlen(msg.text); 2984 2985 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 2986 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2987 } 2988 2989 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 2990 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2991 } 2992 2993 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 2994 hfp_connection->ag_msg = msg; 2995 hfp_connection->ag_vra_state = state; 2996 hfp_connection->ag_vra_send_command = true; 2997 hfp_ag_run_for_context(hfp_connection); 2998 2999 return ERROR_CODE_SUCCESS; 3000 } 3001 3002 3003 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 3004 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3005 if (!hfp_connection){ 3006 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3007 } 3008 3009 if ((gain < 0) || (gain > 15)){ 3010 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3011 return ERROR_CODE_COMMAND_DISALLOWED; 3012 } 3013 3014 if (hfp_connection->microphone_gain != gain){ 3015 hfp_connection->microphone_gain = gain; 3016 hfp_connection->send_microphone_gain = 1; 3017 } 3018 hfp_ag_run_for_context(hfp_connection); 3019 return ERROR_CODE_SUCCESS; 3020 } 3021 3022 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 3023 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3024 if (!hfp_connection){ 3025 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3026 } 3027 3028 if ((gain < 0) || (gain > 15)){ 3029 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 3030 return ERROR_CODE_COMMAND_DISALLOWED; 3031 } 3032 3033 if (hfp_connection->speaker_gain != gain){ 3034 hfp_connection->speaker_gain = gain; 3035 hfp_connection->send_speaker_gain = 1; 3036 } 3037 hfp_ag_run_for_context(hfp_connection); 3038 return ERROR_CODE_SUCCESS; 3039 } 3040 3041 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3042 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3043 if (!hfp_connection){ 3044 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3045 } 3046 3047 hfp_ag_set_clip(0, number); 3048 hfp_connection->send_phone_number_for_voice_tag = 1; 3049 return ERROR_CODE_SUCCESS; 3050 } 3051 3052 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3053 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3054 if (!hfp_connection){ 3055 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3056 } 3057 3058 hfp_connection->send_error = 1; 3059 return ERROR_CODE_SUCCESS; 3060 } 3061 3062 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 3063 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3064 if (!hfp_connection){ 3065 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3066 } 3067 3068 hfp_connection->ok_pending = 1; 3069 return ERROR_CODE_SUCCESS; 3070 } 3071 3072 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3073 hfp_ag_subscriber_numbers = numbers; 3074 hfp_ag_subscriber_numbers_count = numbers_count; 3075 } 3076 3077 void hfp_ag_clear_last_dialed_number(void){ 3078 hfp_gsm_clear_last_dialed_number(); 3079 } 3080 3081 void hfp_ag_set_last_dialed_number(const char * number){ 3082 hfp_gsm_set_last_dialed_number(number); 3083 } 3084 3085 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3086 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3087 if (!hfp_connection){ 3088 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3089 } 3090 3091 if (!hfp_connection->call_waiting_notification_enabled){ 3092 return ERROR_CODE_COMMAND_DISALLOWED; 3093 } 3094 3095 hfp_connection->ag_notify_incoming_call_waiting = 1; 3096 hfp_ag_run_for_context(hfp_connection); 3097 return ERROR_CODE_SUCCESS; 3098 } 3099 3100 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){ 3101 if (!name){ 3102 name = hfp_ag_default_service_name; 3103 } 3104 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3105 3106 /* 3107 * 0x01 – Ability to reject a call 3108 * 0x00 – No ability to reject a call 3109 */ 3110 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3111 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3112 3113 // Construct SupportedFeatures for SDP bitmap: 3114 // 3115 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3116 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3117 // 3118 // Wide band speech (bit 5) requires Codec negotiation 3119 // 3120 uint16_t sdp_features = supported_features & 0x1f; 3121 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3122 sdp_features |= 1 << 5; 3123 } 3124 3125 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3126 sdp_features |= 1 << 6; 3127 } 3128 3129 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3130 sdp_features |= 1 << 7; 3131 } 3132 3133 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3134 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3135 } 3136 3137 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3138 btstack_assert(callback != NULL); 3139 3140 hfp_ag_callback = callback; 3141 hfp_set_ag_callback(callback); 3142 } 3143