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