1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hfp_ag.c" 39 40 // ***************************************************************************** 41 // 42 // HFP Audio Gateway (AG) unit 43 // 44 // ***************************************************************************** 45 46 #include "btstack_config.h" 47 48 #include <stdint.h> 49 #include <stdio.h> 50 #include <string.h> 51 52 #include "hci_cmd.h" 53 #include "btstack_run_loop.h" 54 55 #include "bluetooth_sdp.h" 56 #include "hci.h" 57 #include "btstack_memory.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 #include "btstack_debug.h" 61 #include "btstack_event.h" 62 #include "classic/core.h" 63 #include "classic/hfp.h" 64 #include "classic/hfp_ag.h" 65 #include "classic/hfp_gsm_model.h" 66 #include "classic/sdp_client_rfcomm.h" 67 #include "classic/sdp_server.h" 68 #include "classic/sdp_util.h" 69 70 // private prototypes 71 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection); 72 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection); 73 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection); 74 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection); 75 76 // public prototypes 77 hfp_generic_status_indicator_t * get_hfp_generic_status_indicators(void); 78 int get_hfp_generic_status_indicators_nr(void); 79 void set_hfp_generic_status_indicators(hfp_generic_status_indicator_t * indicators, int indicator_nr); 80 void set_hfp_ag_indicators(hfp_ag_indicator_t * indicators, int indicator_nr); 81 int get_hfp_ag_indicators_nr(hfp_connection_t * context); 82 hfp_ag_indicator_t * get_hfp_ag_indicators(hfp_connection_t * context); 83 84 #define HFP_SUBEVENT_INVALID 0xFFFF 85 86 // const 87 static const char hfp_ag_default_service_name[] = "Voice gateway"; 88 89 // globals 90 91 // higher layer callbacks 92 static btstack_packet_handler_t hfp_ag_callback; 93 94 static btstack_packet_callback_registration_t hfp_ag_hci_event_callback_registration; 95 96 static uint16_t hfp_ag_supported_features; 97 98 // codecs 99 static uint8_t hfp_ag_codecs_nr; 100 static uint8_t hfp_ag_codecs[HFP_MAX_NUM_CODECS]; 101 102 // AG indicators 103 static int hfp_ag_indicators_nr; 104 static hfp_ag_indicator_t hfp_ag_indicators[HFP_MAX_NUM_INDICATORS]; 105 106 // generic status indicators 107 static int hfp_ag_generic_status_indicators_nr; 108 static hfp_generic_status_indicator_t hfp_ag_generic_status_indicators[HFP_MAX_NUM_INDICATORS]; 109 110 static int hfp_ag_call_hold_services_nr; 111 static char * hfp_ag_call_hold_services[6]; 112 113 static hfp_response_and_hold_state_t hfp_ag_response_and_hold_state; 114 static int hfp_ag_response_and_hold_active; 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 hfp_emit_voice_recognition_enabled(hfp_connection, ERROR_CODE_SUCCESS); 913 break; 914 915 default: 916 break; 917 } 918 return status; 919 } 920 921 static uint8_t hfp_ag_vra_send_command(hfp_connection_t * hfp_connection){ 922 uint8_t done = 0; 923 uint8_t status; 924 925 switch (hfp_connection->vra_state_requested){ 926 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG: 927 done = hfp_ag_send_enhanced_voice_recognition_msg_cmd(hfp_connection); 928 if (done == 0){ 929 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 930 } else { 931 hfp_ag_emit_enhanced_voice_recognition_msg_sent_event(hfp_connection, ERROR_CODE_SUCCESS); 932 } 933 hfp_connection->vra_state_requested = hfp_connection->vra_state; 934 return done; 935 936 case HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS: 937 done = hfp_ag_send_enhanced_voice_recognition_state_cmd(hfp_connection); 938 if (done == 0){ 939 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_UNSPECIFIED_ERROR); 940 } else { 941 hfp_emit_enhanced_voice_recognition_state_event(hfp_connection, ERROR_CODE_SUCCESS); 942 } 943 hfp_connection->vra_state_requested = hfp_connection->vra_state; 944 return done; 945 946 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED: 947 case HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF: 948 done = hfp_ag_send_voice_recognition_cmd(hfp_connection, hfp_connection->ag_activate_voice_recognition_value); 949 if (done == 0){ 950 hfp_connection->vra_state_requested = hfp_connection->vra_state; 951 952 if (hfp_connection->ag_activate_voice_recognition_value == 1){ 953 hfp_emit_voice_recognition_enabled(hfp_connection, done); 954 } else { 955 hfp_emit_voice_recognition_disabled(hfp_connection, done); 956 } 957 return 0; 958 } 959 status = hfp_ag_vra_state_machine_two(hfp_connection); 960 return (status == ERROR_CODE_SUCCESS) ? 1 : 0; 961 962 default: 963 log_error("state %u", hfp_connection->vra_state_requested); 964 btstack_assert(false); 965 return 0; 966 } 967 } 968 969 static int hfp_ag_voice_recognition_state_machine(hfp_connection_t * hfp_connection){ 970 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) { 971 return 0; 972 } 973 int done = 0; 974 uint8_t status; 975 976 // VRA action initiated by AG 977 if (hfp_connection->ag_vra_send_command){ 978 hfp_connection->ag_vra_send_command = false; 979 return hfp_ag_vra_send_command(hfp_connection); 980 } 981 982 switch (hfp_connection->command){ 983 case HFP_CMD_AG_ACTIVATE_VOICE_RECOGNITION: 984 return hfp_ag_vra_send_command(hfp_connection); 985 986 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 987 // HF initiatied voice recognition, parser extracted activation value 988 switch (hfp_connection->ag_activate_voice_recognition_value){ 989 case 0: 990 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 991 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 992 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 993 } 994 break; 995 996 case 1: 997 if (hfp_ag_can_activate_voice_recognition(hfp_connection)){ 998 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 999 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1000 } 1001 break; 1002 1003 case 2: 1004 if (hfp_ag_voice_recognition_session_active(hfp_connection)){ 1005 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO; 1006 done = hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1007 } 1008 break; 1009 default: 1010 break; 1011 } 1012 if (done == 0){ 1013 hfp_connection->vra_state_requested = hfp_connection->vra_state; 1014 done = hfp_ag_send_error(hfp_connection->rfcomm_cid); 1015 return 1; 1016 } 1017 break; 1018 1019 default: 1020 return 0; 1021 } 1022 1023 status = hfp_ag_vra_state_machine_two(hfp_connection); 1024 if (status != ERROR_CODE_SUCCESS){ 1025 return 0; 1026 } 1027 return done; 1028 } 1029 1030 static int hfp_ag_run_for_context_service_level_connection_queries(hfp_connection_t * hfp_connection){ 1031 int sent = codecs_exchange_state_machine(hfp_connection); 1032 if (sent) return 1; 1033 1034 if (hfp_connection->ag_send_in_band_ring_tone_setting){ 1035 hfp_connection->ag_send_in_band_ring_tone_setting = false; 1036 hfp_ag_send_change_in_band_ring_tone_setting_cmd(hfp_connection->rfcomm_cid); 1037 return 1; 1038 } 1039 1040 switch(hfp_connection->command){ 1041 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME: 1042 hfp_ag_send_report_network_operator_name_cmd(hfp_connection->rfcomm_cid, hfp_connection->network_operator); 1043 return 1; 1044 case HFP_CMD_QUERY_OPERATOR_SELECTION_NAME_FORMAT: 1045 if (hfp_connection->network_operator.format != 0){ 1046 hfp_ag_send_error(hfp_connection->rfcomm_cid); 1047 } else { 1048 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1049 } 1050 return 1; 1051 case HFP_CMD_ENABLE_INDIVIDUAL_AG_INDICATOR_STATUS_UPDATE: 1052 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1053 return 1; 1054 case HFP_CMD_ENABLE_EXTENDED_AUDIO_GATEWAY_ERROR: 1055 if (hfp_connection->extended_audio_gateway_error){ 1056 hfp_connection->extended_audio_gateway_error = 0; 1057 hfp_ag_send_report_extended_audio_gateway_error(hfp_connection->rfcomm_cid, hfp_connection->extended_audio_gateway_error_value); 1058 return 1; 1059 } 1060 break; 1061 case HFP_CMD_ENABLE_INDICATOR_STATUS_UPDATE: 1062 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 1063 return 1; 1064 default: 1065 break; 1066 } 1067 return 0; 1068 } 1069 1070 static int hfp_ag_run_for_audio_connection(hfp_connection_t * hfp_connection){ 1071 if ((hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) || 1072 (hfp_connection->state > HFP_W2_DISCONNECT_SCO)) return 0; 1073 1074 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1075 1076 if (hfp_connection->release_audio_connection){ 1077 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 1078 hfp_connection->release_audio_connection = 0; 1079 gap_disconnect(hfp_connection->sco_handle); 1080 return 1; 1081 } 1082 1083 // accept incoming audio connection (codec negotiation is not used) 1084 if (hfp_connection->accept_sco){ 1085 // notify about codec selection if not done already 1086 if (hfp_connection->negotiated_codec == 0){ 1087 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 1088 } 1089 // 1090 bool incoming_eSCO = hfp_connection->accept_sco == 2; 1091 hfp_connection->accept_sco = 0; 1092 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1093 hfp_accept_synchronous_connection(hfp_connection, incoming_eSCO); 1094 return 1; 1095 } 1096 1097 // run codecs exchange 1098 int sent = codecs_exchange_state_machine(hfp_connection); 1099 if (sent) return 1; 1100 1101 if (hfp_connection->codecs_state != HFP_CODECS_EXCHANGED) return 0; 1102 if (hfp_connection->establish_audio_connection){ 1103 hfp_connection->state = HFP_W4_SCO_CONNECTED; 1104 hfp_connection->establish_audio_connection = 0; 1105 hfp_setup_synchronous_connection(hfp_connection); 1106 return 1; 1107 } 1108 return 0; 1109 } 1110 1111 static void hfp_ag_set_callsetup_indicator(void){ 1112 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callsetup"); 1113 if (!indicator){ 1114 log_error("hfp_ag_set_callsetup_indicator: callsetup indicator is missing"); 1115 return; 1116 }; 1117 indicator->status = hfp_gsm_callsetup_status(); 1118 } 1119 1120 static void hfp_ag_set_callheld_indicator(void){ 1121 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("callheld"); 1122 if (!indicator){ 1123 log_error("hfp_ag_set_callheld_state: callheld indicator is missing"); 1124 return; 1125 }; 1126 indicator->status = hfp_gsm_callheld_status(); 1127 } 1128 1129 // 1130 // transition implementations for hfp_ag_call_state_machine 1131 // 1132 1133 static void hfp_ag_hf_start_ringing_incoming(hfp_connection_t * hfp_connection){ 1134 if (use_in_band_tone()){ 1135 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING; 1136 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1137 } else { 1138 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1139 } 1140 } 1141 1142 static void hfp_ag_hf_start_ringing_outgoing(hfp_connection_t * hfp_connection){ 1143 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1144 } 1145 1146 static void hfp_ag_hf_stop_ringing(hfp_connection_t * hfp_connection){ 1147 hfp_connection->ag_ring = 0; 1148 hfp_connection->ag_send_clip = 0; 1149 } 1150 1151 1152 static void hfp_ag_trigger_incoming_call_during_active_one(void){ 1153 btstack_linked_list_iterator_t it; 1154 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1155 while (btstack_linked_list_iterator_has_next(&it)){ 1156 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1157 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1158 if (hfp_connection->call_state != HFP_CALL_ACTIVE) continue; 1159 1160 hfp_connection->call_state = HFP_CALL_W2_SEND_CALL_WAITING; 1161 hfp_ag_run_for_context(hfp_connection); 1162 } 1163 } 1164 1165 static void hfp_ag_trigger_ring_and_clip(void) { 1166 btstack_linked_list_iterator_t it; 1167 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1168 while (btstack_linked_list_iterator_has_next(&it)){ 1169 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1170 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1171 switch (hfp_connection->call_state){ 1172 case HFP_CALL_INCOMING_RINGING: 1173 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1174 case HFP_CALL_OUTGOING_RINGING: 1175 // Queue RING on this connection 1176 hfp_connection->ag_ring = 1; 1177 1178 // HFP v1.8, 4.23 Calling Line Identification (CLI) Notification 1179 // "If the calling subscriber number information is available from the network, the AG shall issue the 1180 // +CLIP unsolicited result code just after every RING indication when the HF is alerted in an incoming call." 1181 hfp_connection->ag_send_clip = hfp_gsm_clip_type() && hfp_connection->clip_enabled; 1182 1183 // trigger next message 1184 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1185 break; 1186 default: 1187 break; 1188 } 1189 } 1190 } 1191 1192 // trigger RING and CLIP messages on connections that are ringing 1193 static void hfp_ag_ring_timeout_handler(btstack_timer_source_t * timer){ 1194 hfp_ag_trigger_ring_and_clip(); 1195 1196 btstack_run_loop_set_timer(timer, HFP_RING_PERIOD_MS); // 2 seconds timeout 1197 btstack_run_loop_add_timer(timer); 1198 } 1199 1200 static void hfp_ag_ring_timeout_stop(void){ 1201 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1202 } 1203 1204 static void hfp_ag_start_ringing(void){ 1205 // setup ring timer 1206 btstack_run_loop_remove_timer(&hfp_ag_ring_timeout); 1207 btstack_run_loop_set_timer_handler(&hfp_ag_ring_timeout, hfp_ag_ring_timeout_handler); 1208 btstack_run_loop_set_timer(&hfp_ag_ring_timeout, HFP_RING_PERIOD_MS); // 2 seconds timeout 1209 btstack_run_loop_add_timer(&hfp_ag_ring_timeout); 1210 1211 // emit start ringing 1212 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_START_RINGING); 1213 1214 // send initial RING + CLIP 1215 hfp_ag_trigger_ring_and_clip(); 1216 } 1217 1218 static void hfp_ag_stop_ringing(void){ 1219 hfp_ag_ring_timeout_stop(); 1220 hfp_ag_emit_general_simple_event(HFP_SUBEVENT_STOP_RINGING); 1221 1222 btstack_linked_list_iterator_t it; 1223 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1224 while (btstack_linked_list_iterator_has_next(&it)){ 1225 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1226 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1227 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1228 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1229 hfp_ag_hf_stop_ringing(hfp_connection); 1230 } 1231 } 1232 1233 static void hfp_ag_trigger_incoming_call_idle(void){ 1234 int indicator_index = get_ag_indicator_index_for_name("callsetup"); 1235 if (indicator_index < 0) return; 1236 1237 // update callsetup state in connections 1238 btstack_linked_list_iterator_t it; 1239 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1240 while (btstack_linked_list_iterator_has_next(&it)){ 1241 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1242 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1243 if (hfp_connection->call_state != HFP_CALL_IDLE) continue; 1244 1245 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1246 1247 hfp_ag_hf_start_ringing_incoming(hfp_connection); 1248 1249 hfp_ag_run_for_context(hfp_connection); 1250 } 1251 1252 // start local ringing - started after connection state has been updated 1253 hfp_ag_start_ringing(); 1254 } 1255 1256 static void hfp_ag_trigger_outgoing_call(void){ 1257 btstack_linked_list_iterator_t it; 1258 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1259 while (btstack_linked_list_iterator_has_next(&it)){ 1260 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1261 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1262 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1263 if (hfp_connection->call_state == HFP_CALL_IDLE){ 1264 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1265 } 1266 } 1267 } 1268 1269 static void hfp_ag_handle_outgoing_call_accepted(hfp_connection_t * hfp_connection){ 1270 hfp_connection->call_state = HFP_CALL_OUTGOING_DIALING; 1271 1272 // trigger callsetup to be 1273 int put_call_on_hold = hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT; 1274 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ACCEPTED, 0, 0, NULL); 1275 1276 int indicator_index ; 1277 1278 hfp_ag_set_callsetup_indicator(); 1279 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1280 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1281 1282 // put current call on hold if active 1283 if (put_call_on_hold){ 1284 log_info("AG putting current call on hold for new outgoing call"); 1285 hfp_ag_set_callheld_indicator(); 1286 indicator_index = get_ag_indicator_index_for_name("callheld"); 1287 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[indicator_index]); 1288 } 1289 1290 // start audio if needed 1291 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1292 } 1293 1294 static void hfp_ag_transfer_indicator(const char * name){ 1295 int indicator_index = get_ag_indicator_index_for_name(name); 1296 if (indicator_index < 0) return; 1297 1298 btstack_linked_list_iterator_t it; 1299 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1300 while (btstack_linked_list_iterator_has_next(&it)){ 1301 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1302 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1303 hfp_ag_establish_service_level_connection(hfp_connection->remote_addr); 1304 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1305 hfp_ag_run_for_context(hfp_connection); 1306 } 1307 } 1308 1309 static void hfp_ag_transfer_callsetup_state(void){ 1310 hfp_ag_transfer_indicator("callsetup"); 1311 } 1312 1313 static void hfp_ag_transfer_call_state(void){ 1314 hfp_ag_transfer_indicator("call"); 1315 } 1316 1317 static void hfp_ag_transfer_callheld_state(void){ 1318 hfp_ag_transfer_indicator("callheld"); 1319 } 1320 1321 static void hfp_ag_hf_accept_call(hfp_connection_t * source){ 1322 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1323 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1324 1325 hfp_ag_stop_ringing(); 1326 1327 btstack_linked_list_iterator_t it; 1328 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1329 while (btstack_linked_list_iterator_has_next(&it)){ 1330 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1331 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1332 if ((hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) && 1333 (hfp_connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1334 1335 if (hfp_connection == source){ 1336 1337 if (use_in_band_tone()){ 1338 hfp_connection->call_state = HFP_CALL_ACTIVE; 1339 } else { 1340 hfp_connection->call_state = HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE; 1341 hfp_ag_establish_audio_connection(hfp_connection->acl_handle); 1342 } 1343 1344 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1345 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1346 1347 } else { 1348 hfp_connection->call_state = HFP_CALL_IDLE; 1349 } 1350 hfp_ag_run_for_context(hfp_connection); 1351 } 1352 } 1353 1354 static void hfp_ag_ag_accept_call(void){ 1355 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1356 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1357 1358 hfp_ag_stop_ringing(); 1359 1360 btstack_linked_list_iterator_t it; 1361 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1362 while (btstack_linked_list_iterator_has_next(&it)){ 1363 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1364 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1365 if (hfp_connection->call_state != HFP_CALL_INCOMING_RINGING) continue; 1366 1367 hfp_connection->call_state = HFP_CALL_TRIGGER_AUDIO_CONNECTION; 1368 1369 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1370 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1371 1372 hfp_ag_run_for_context(hfp_connection); 1373 break; // only single 1374 } 1375 } 1376 1377 static void hfp_ag_trigger_reject_call(void){ 1378 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1379 1380 hfp_ag_stop_ringing(); 1381 1382 btstack_linked_list_iterator_t it; 1383 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1384 while (btstack_linked_list_iterator_has_next(&it)){ 1385 hfp_connection_t * connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1386 if (connection->local_role != HFP_ROLE_AG) continue; 1387 if ((connection->call_state != HFP_CALL_INCOMING_RINGING) && 1388 (connection->call_state != HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING)) continue; 1389 1390 connection->call_state = HFP_CALL_IDLE; 1391 connection->ag_indicators_status_update_bitmap = store_bit(connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1392 1393 if (connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1394 connection->release_audio_connection = 1; 1395 } 1396 hfp_emit_simple_event(connection, HFP_SUBEVENT_CALL_TERMINATED); 1397 hfp_ag_run_for_context(connection); 1398 rfcomm_request_can_send_now_event(connection->rfcomm_cid); 1399 } 1400 } 1401 1402 static void hfp_ag_trigger_terminate_call(void){ 1403 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1404 1405 // no ringing during call 1406 1407 btstack_linked_list_iterator_t it; 1408 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1409 while (btstack_linked_list_iterator_has_next(&it)){ 1410 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1411 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1412 if (hfp_connection->call_state == HFP_CALL_IDLE) continue; 1413 1414 hfp_connection->call_state = HFP_CALL_IDLE; 1415 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1416 1417 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 1418 hfp_connection->release_audio_connection = 1; 1419 } 1420 1421 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED); 1422 hfp_ag_run_for_context(hfp_connection); 1423 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 1424 } 1425 } 1426 1427 static void hfp_ag_set_call_indicator(void){ 1428 hfp_ag_indicator_t * indicator = get_ag_indicator_for_name("call"); 1429 if (!indicator){ 1430 log_error("hfp_ag_set_call_state: call indicator is missing"); 1431 return; 1432 }; 1433 indicator->status = hfp_gsm_call_status(); 1434 } 1435 1436 static hfp_connection_t * hfp_ag_connection_for_call_state(hfp_call_state_t call_state){ 1437 btstack_linked_list_iterator_t it; 1438 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1439 while (btstack_linked_list_iterator_has_next(&it)){ 1440 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1441 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1442 if (hfp_connection->call_state == call_state) return hfp_connection; 1443 } 1444 return NULL; 1445 } 1446 1447 static void hfp_ag_send_response_and_hold_state(hfp_response_and_hold_state_t state){ 1448 btstack_linked_list_iterator_t it; 1449 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 1450 while (btstack_linked_list_iterator_has_next(&it)){ 1451 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 1452 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 1453 hfp_connection->send_response_and_hold_status = state + 1; 1454 } 1455 } 1456 1457 static int call_setup_state_machine(hfp_connection_t * hfp_connection){ 1458 int indicator_index; 1459 switch (hfp_connection->call_state){ 1460 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_IN_BAND_RING: 1461 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1462 1463 // we got event: audio hfp_connection established 1464 hfp_connection->call_state = HFP_CALL_INCOMING_RINGING; 1465 break; 1466 case HFP_CALL_W4_AUDIO_CONNECTION_FOR_ACTIVE: 1467 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED) return 0; 1468 // we got event: audio hfp_connection established 1469 hfp_connection->call_state = HFP_CALL_ACTIVE; 1470 break; 1471 case HFP_CALL_W2_SEND_CALL_WAITING: 1472 hfp_connection->call_state = HFP_CALL_W4_CHLD; 1473 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 1474 indicator_index = get_ag_indicator_index_for_name("callsetup"); 1475 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 1476 break; 1477 default: 1478 break; 1479 } 1480 return 0; 1481 } 1482 1483 // functions extracted from hfp_ag_call_sm below 1484 static void hfp_ag_handle_reject_outgoing_call(void){ 1485 hfp_connection_t * hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1486 if (!hfp_connection){ 1487 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1488 return; 1489 } 1490 1491 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_REJECTED, 0, 0, NULL); 1492 hfp_connection->call_state = HFP_CALL_IDLE; 1493 hfp_connection->send_error = 1; 1494 hfp_ag_run_for_context(hfp_connection); 1495 } 1496 1497 // hfp_connection is used to identify originating HF 1498 static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_connection){ 1499 int callsetup_indicator_index = get_ag_indicator_index_for_name("callsetup"); 1500 int callheld_indicator_index = get_ag_indicator_index_for_name("callheld"); 1501 int call_indicator_index = get_ag_indicator_index_for_name("call"); 1502 1503 switch (event){ 1504 case HFP_AG_INCOMING_CALL: 1505 switch (hfp_gsm_call_status()){ 1506 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1507 switch (hfp_gsm_callsetup_status()){ 1508 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1509 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1510 hfp_ag_set_callsetup_indicator(); 1511 hfp_ag_trigger_incoming_call_idle(); 1512 log_info("AG rings"); 1513 break; 1514 default: 1515 break; 1516 } 1517 break; 1518 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1519 switch (hfp_gsm_callsetup_status()){ 1520 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1521 hfp_gsm_handler(HFP_AG_INCOMING_CALL, 0, 0, NULL); 1522 hfp_ag_set_callsetup_indicator(); 1523 hfp_ag_trigger_incoming_call_during_active_one(); 1524 log_info("AG call waiting"); 1525 break; 1526 default: 1527 break; 1528 } 1529 break; 1530 default: 1531 break; 1532 } 1533 break; 1534 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG: 1535 switch (hfp_gsm_call_status()){ 1536 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1537 switch (hfp_gsm_callsetup_status()){ 1538 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1539 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1540 hfp_ag_set_call_indicator(); 1541 hfp_ag_set_callsetup_indicator(); 1542 hfp_ag_ag_accept_call(); 1543 log_info("AG answers call, accept call by GSM"); 1544 break; 1545 default: 1546 break; 1547 } 1548 break; 1549 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1550 switch (hfp_gsm_callsetup_status()){ 1551 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1552 log_info("AG: current call is placed on hold, incoming call gets active"); 1553 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, 0, 0, NULL); 1554 hfp_ag_set_callsetup_indicator(); 1555 hfp_ag_set_callheld_indicator(); 1556 hfp_ag_transfer_callsetup_state(); 1557 hfp_ag_transfer_callheld_state(); 1558 break; 1559 default: 1560 break; 1561 } 1562 break; 1563 default: 1564 break; 1565 } 1566 break; 1567 1568 case HFP_AG_HELD_CALL_JOINED_BY_AG: 1569 switch (hfp_gsm_call_status()){ 1570 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1571 switch (hfp_gsm_callheld_status()){ 1572 case HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED: 1573 log_info("AG: joining held call with active call"); 1574 hfp_gsm_handler(HFP_AG_HELD_CALL_JOINED_BY_AG, 0, 0, NULL); 1575 hfp_ag_set_callheld_indicator(); 1576 hfp_ag_transfer_callheld_state(); 1577 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1578 break; 1579 default: 1580 break; 1581 } 1582 break; 1583 default: 1584 break; 1585 } 1586 break; 1587 1588 case HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF: 1589 switch (hfp_gsm_call_status()){ 1590 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1591 switch (hfp_gsm_callsetup_status()){ 1592 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1593 hfp_gsm_handler(HFP_AG_INCOMING_CALL_ACCEPTED_BY_HF, 0, 0, NULL); 1594 hfp_ag_set_callsetup_indicator(); 1595 hfp_ag_set_call_indicator(); 1596 hfp_ag_hf_accept_call(hfp_connection); 1597 hfp_connection->ok_pending = 1; 1598 log_info("HF answers call, accept call by GSM"); 1599 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1600 break; 1601 default: 1602 break; 1603 } 1604 break; 1605 default: 1606 break; 1607 } 1608 break; 1609 1610 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG: 1611 switch (hfp_gsm_call_status()){ 1612 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1613 switch (hfp_gsm_callsetup_status()){ 1614 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1615 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, 0, 0, NULL); 1616 hfp_ag_response_and_hold_active = 1; 1617 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1618 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1619 // as with regular call 1620 hfp_ag_set_call_indicator(); 1621 hfp_ag_set_callsetup_indicator(); 1622 hfp_ag_ag_accept_call(); 1623 log_info("AG response and hold - hold by AG"); 1624 break; 1625 default: 1626 break; 1627 } 1628 break; 1629 default: 1630 break; 1631 } 1632 break; 1633 1634 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF: 1635 switch (hfp_gsm_call_status()){ 1636 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1637 switch (hfp_gsm_callsetup_status()){ 1638 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1639 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, 0, 0, NULL); 1640 hfp_ag_response_and_hold_active = 1; 1641 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 1642 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1643 // as with regular call 1644 hfp_ag_set_call_indicator(); 1645 hfp_ag_set_callsetup_indicator(); 1646 hfp_ag_hf_accept_call(hfp_connection); 1647 log_info("AG response and hold - hold by HF"); 1648 break; 1649 default: 1650 break; 1651 } 1652 break; 1653 default: 1654 break; 1655 } 1656 break; 1657 1658 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG: 1659 case HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF: 1660 if (!hfp_ag_response_and_hold_active) break; 1661 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1662 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, 0, 0, NULL); 1663 hfp_ag_response_and_hold_active = 0; 1664 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED; 1665 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1666 log_info("Held Call accepted and active"); 1667 break; 1668 1669 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG: 1670 case HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF: 1671 if (!hfp_ag_response_and_hold_active) break; 1672 if (hfp_ag_response_and_hold_state != HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD) break; 1673 hfp_gsm_handler(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, 0, 0, NULL); 1674 hfp_ag_response_and_hold_active = 0; 1675 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1676 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1677 // from terminate by ag 1678 hfp_ag_set_call_indicator(); 1679 hfp_ag_trigger_terminate_call(); 1680 break; 1681 1682 case HFP_AG_TERMINATE_CALL_BY_HF: 1683 switch (hfp_gsm_call_status()){ 1684 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1685 switch (hfp_gsm_callsetup_status()){ 1686 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1687 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1688 hfp_ag_set_callsetup_indicator(); 1689 hfp_ag_transfer_callsetup_state(); 1690 hfp_ag_trigger_reject_call(); 1691 log_info("HF Rejected Incoming call, AG terminate call"); 1692 break; 1693 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1694 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1695 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1696 hfp_ag_set_callsetup_indicator(); 1697 hfp_ag_transfer_callsetup_state(); 1698 log_info("AG terminate outgoing call process"); 1699 break; 1700 default: 1701 break; 1702 } 1703 break; 1704 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1705 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_HF, 0, 0, NULL); 1706 hfp_ag_set_callsetup_indicator(); 1707 hfp_ag_set_call_indicator(); 1708 hfp_ag_trigger_terminate_call(); 1709 log_info("AG terminate call"); 1710 break; 1711 default: 1712 break; 1713 } 1714 break; 1715 1716 case HFP_AG_TERMINATE_CALL_BY_AG: 1717 switch (hfp_gsm_call_status()){ 1718 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1719 switch (hfp_gsm_callsetup_status()){ 1720 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1721 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1722 hfp_ag_set_callsetup_indicator(); 1723 hfp_ag_trigger_reject_call(); 1724 log_info("AG Rejected Incoming call, AG terminate call"); 1725 break; 1726 default: 1727 break; 1728 } 1729 break; 1730 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1731 hfp_gsm_handler(HFP_AG_TERMINATE_CALL_BY_AG, 0, 0, NULL); 1732 hfp_ag_set_callsetup_indicator(); 1733 hfp_ag_set_call_indicator(); 1734 hfp_ag_trigger_terminate_call(); 1735 log_info("AG terminate call"); 1736 break; 1737 default: 1738 break; 1739 } 1740 break; 1741 case HFP_AG_CALL_DROPPED: 1742 switch (hfp_gsm_call_status()){ 1743 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1744 switch (hfp_gsm_callsetup_status()){ 1745 case HFP_CALLSETUP_STATUS_INCOMING_CALL_SETUP_IN_PROGRESS: 1746 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_ALERTING_STATE: 1747 hfp_ag_stop_ringing(); 1748 break; 1749 case HFP_CALLSETUP_STATUS_OUTGOING_CALL_SETUP_IN_DIALING_STATE: 1750 log_info("Outgoing call interrupted\n"); 1751 break; 1752 default: 1753 break; 1754 } 1755 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1756 hfp_ag_set_callsetup_indicator(); 1757 hfp_ag_transfer_callsetup_state(); 1758 hfp_ag_trigger_terminate_call(); 1759 break; 1760 case HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT: 1761 if (hfp_ag_response_and_hold_active) { 1762 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1763 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED; 1764 hfp_ag_send_response_and_hold_state(hfp_ag_response_and_hold_state); 1765 } 1766 hfp_gsm_handler(HFP_AG_CALL_DROPPED, 0, 0, NULL); 1767 hfp_ag_set_callsetup_indicator(); 1768 hfp_ag_set_call_indicator(); 1769 hfp_ag_trigger_terminate_call(); 1770 log_info("AG notify call dropped"); 1771 break; 1772 default: 1773 break; 1774 } 1775 break; 1776 1777 case HFP_AG_OUTGOING_CALL_INITIATED_BY_HF: 1778 // directly reject call if number of free slots is exceeded 1779 if (!hfp_gsm_call_possible()){ 1780 hfp_connection->send_error = 1; 1781 hfp_ag_run_for_context(hfp_connection); 1782 break; 1783 } 1784 1785 // note: number not used currently 1786 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_HF, 0, 0, (const char *) &hfp_connection->line_buffer[3]); 1787 1788 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1789 1790 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, (const char *) &hfp_connection->line_buffer[3]); 1791 break; 1792 1793 case HFP_AG_OUTGOING_CALL_INITIATED_BY_AG: 1794 // directly reject call if number of free slots is exceeded 1795 if (!hfp_gsm_call_possible()) { 1796 // TODO: no error for user 1797 break; 1798 } 1799 switch (hfp_gsm_call_status()) { 1800 case HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS: 1801 switch (hfp_gsm_callsetup_status()) { 1802 case HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS: 1803 // note: number not used currently 1804 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, 0, 0, "1234567"); 1805 // init call state for all connections 1806 hfp_ag_trigger_outgoing_call(); 1807 // get first one and accept call 1808 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1809 if (hfp_connection) { 1810 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1811 } 1812 break; 1813 default: 1814 // TODO: no error for user 1815 break; 1816 } 1817 break; 1818 default: 1819 // TODO: no error for user 1820 break; 1821 } 1822 break; 1823 case HFP_AG_OUTGOING_REDIAL_INITIATED:{ 1824 // directly reject call if number of free slots is exceeded 1825 if (!hfp_gsm_call_possible()){ 1826 hfp_connection->send_error = 1; 1827 hfp_ag_run_for_context(hfp_connection); 1828 break; 1829 } 1830 1831 hfp_gsm_handler(HFP_AG_OUTGOING_REDIAL_INITIATED, 0, 0, NULL); 1832 hfp_connection->call_state = HFP_CALL_OUTGOING_INITIATED; 1833 1834 log_info("Redial last number"); 1835 char * last_dialed_number = hfp_gsm_last_dialed_number(); 1836 1837 if (strlen(last_dialed_number) > 0){ 1838 log_info("Last number exists: accept call"); 1839 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_PLACE_CALL_WITH_NUMBER, last_dialed_number); 1840 } else { 1841 log_info("log_infoLast number missing: reject call"); 1842 hfp_ag_handle_reject_outgoing_call(); 1843 } 1844 break; 1845 } 1846 case HFP_AG_OUTGOING_CALL_REJECTED: 1847 hfp_ag_handle_reject_outgoing_call(); 1848 break; 1849 1850 case HFP_AG_OUTGOING_CALL_ACCEPTED:{ 1851 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_INITIATED); 1852 if (!hfp_connection){ 1853 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in initiated state"); 1854 break; 1855 } 1856 1857 hfp_connection->ok_pending = 1; 1858 hfp_ag_handle_outgoing_call_accepted(hfp_connection); 1859 break; 1860 } 1861 case HFP_AG_OUTGOING_CALL_RINGING: 1862 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1863 if (!hfp_connection){ 1864 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection in dialing state"); 1865 break; 1866 } 1867 1868 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_RINGING, 0, 0, NULL); 1869 hfp_connection->call_state = HFP_CALL_OUTGOING_RINGING; 1870 hfp_ag_set_callsetup_indicator(); 1871 hfp_ag_transfer_callsetup_state(); 1872 hfp_ag_hf_start_ringing_outgoing(hfp_connection); 1873 break; 1874 1875 case HFP_AG_OUTGOING_CALL_ESTABLISHED:{ 1876 // get outgoing call 1877 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_RINGING); 1878 if (!hfp_connection){ 1879 hfp_connection = hfp_ag_connection_for_call_state(HFP_CALL_OUTGOING_DIALING); 1880 } 1881 if (!hfp_connection){ 1882 log_info("hfp_ag_call_sm: did not find outgoing hfp_connection"); 1883 break; 1884 } 1885 1886 bool callheld_status_call_on_hold_and_no_active_calls = hfp_gsm_callheld_status() == HFP_CALLHELD_STATUS_CALL_ON_HOLD_AND_NO_ACTIVE_CALLS; 1887 hfp_gsm_handler(HFP_AG_OUTGOING_CALL_ESTABLISHED, 0, 0, NULL); 1888 hfp_connection->call_state = HFP_CALL_ACTIVE; 1889 hfp_ag_set_callsetup_indicator(); 1890 hfp_ag_set_call_indicator(); 1891 hfp_ag_transfer_call_state(); 1892 hfp_ag_transfer_callsetup_state(); 1893 if (callheld_status_call_on_hold_and_no_active_calls){ 1894 hfp_ag_set_callheld_indicator(); 1895 hfp_ag_transfer_callheld_state(); 1896 } 1897 hfp_ag_hf_stop_ringing(hfp_connection); 1898 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED); 1899 break; 1900 } 1901 1902 case HFP_AG_CALL_HOLD_USER_BUSY: 1903 hfp_gsm_handler(HFP_AG_CALL_HOLD_USER_BUSY, 0, 0, NULL); 1904 hfp_ag_set_callsetup_indicator(); 1905 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1906 hfp_connection->call_state = HFP_CALL_ACTIVE; 1907 log_info("AG: Call Waiting, User Busy"); 1908 break; 1909 1910 case HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1911 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1912 int call_held = hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD; 1913 1914 // Releases all active calls (if any exist) and accepts the other (held or waiting) call. 1915 if (call_held || call_setup_in_progress){ 1916 hfp_gsm_handler(HFP_AG_CALL_HOLD_RELEASE_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 1917 0, NULL); 1918 1919 } 1920 1921 if (call_setup_in_progress){ 1922 log_info("AG: Call Dropped, Accept new call"); 1923 hfp_ag_set_callsetup_indicator(); 1924 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1925 } else { 1926 log_info("AG: Call Dropped, Resume held call"); 1927 } 1928 if (call_held){ 1929 hfp_ag_set_callheld_indicator(); 1930 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1931 } 1932 1933 hfp_connection->call_state = HFP_CALL_ACTIVE; 1934 break; 1935 } 1936 1937 case HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL:{ 1938 // Places all active calls (if any exist) on hold and accepts the other (held or waiting) call. 1939 // only update if callsetup changed 1940 int call_setup_in_progress = hfp_gsm_callsetup_status() != HFP_CALLSETUP_STATUS_NO_CALL_SETUP_IN_PROGRESS; 1941 hfp_gsm_handler(HFP_AG_CALL_HOLD_PARK_ACTIVE_ACCEPT_HELD_OR_WAITING_CALL, hfp_connection->call_index, 0, 1942 NULL); 1943 1944 if (call_setup_in_progress){ 1945 log_info("AG: Call on Hold, Accept new call"); 1946 hfp_ag_set_callsetup_indicator(); 1947 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callsetup_indicator_index, 1); 1948 } else { 1949 log_info("AG: Swap calls"); 1950 } 1951 1952 hfp_ag_set_callheld_indicator(); 1953 // hfp_ag_set_callheld_state(HFP_CALLHELD_STATUS_CALL_ON_HOLD_OR_SWAPPED); 1954 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1955 hfp_connection->call_state = HFP_CALL_ACTIVE; 1956 break; 1957 } 1958 1959 case HFP_AG_CALL_HOLD_ADD_HELD_CALL: 1960 // Adds a held call to the conversation. 1961 if (hfp_gsm_callheld_status() != HFP_CALLHELD_STATUS_NO_CALLS_HELD){ 1962 log_info("AG: Join 3-way-call"); 1963 hfp_gsm_handler(HFP_AG_CALL_HOLD_ADD_HELD_CALL, 0, 0, NULL); 1964 hfp_ag_set_callheld_indicator(); 1965 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1966 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CONFERENCE_CALL); 1967 } 1968 hfp_connection->call_state = HFP_CALL_ACTIVE; 1969 break; 1970 case HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS: 1971 // Connects the two calls and disconnects the subscriber from both calls (Explicit Call Transfer) 1972 hfp_gsm_handler(HFP_AG_CALL_HOLD_EXIT_AND_JOIN_CALLS, 0, 0, NULL); 1973 log_info("AG: Transfer call -> Connect two calls and disconnect"); 1974 hfp_ag_set_call_indicator(); 1975 hfp_ag_set_callheld_indicator(); 1976 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, call_indicator_index, 1); 1977 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, callheld_indicator_index, 1); 1978 hfp_connection->call_state = HFP_CALL_IDLE; 1979 break; 1980 1981 default: 1982 break; 1983 } 1984 1985 1986 } 1987 1988 1989 static void hfp_ag_send_call_status(hfp_connection_t * hfp_connection, int call_index){ 1990 hfp_gsm_call_t * active_call = hfp_gsm_call(call_index); 1991 if (!active_call) return; 1992 1993 int idx = active_call->index; 1994 hfp_enhanced_call_dir_t dir = active_call->direction; 1995 hfp_enhanced_call_status_t status = active_call->enhanced_status; 1996 hfp_enhanced_call_mode_t mode = active_call->mode; 1997 hfp_enhanced_call_mpty_t mpty = active_call->mpty; 1998 uint8_t type = active_call->clip_type; 1999 char * number = active_call->clip_number; 2000 2001 char buffer[100]; 2002 // TODO: check length of a buffer, to fit the MTU 2003 int offset = snprintf(buffer, sizeof(buffer), "\r\n%s: %d,%d,%d,%d,%d", HFP_LIST_CURRENT_CALLS, idx, dir, status, mode, mpty); 2004 if (number){ 2005 offset += snprintf(buffer+offset, sizeof(buffer)-offset-3, ", \"%s\",%u", number, type); 2006 } 2007 snprintf(buffer+offset, sizeof(buffer)-offset, "\r\n"); 2008 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, 2009 mode, mpty, type, number); 2010 send_str_over_rfcomm(hfp_connection->rfcomm_cid, buffer); 2011 } 2012 2013 // sends pending command, returns if command was sent 2014 static int hfp_ag_send_commands(hfp_connection_t *hfp_connection){ 2015 if (hfp_connection->send_status_of_current_calls){ 2016 hfp_connection->ok_pending = 0; 2017 if (hfp_connection->next_call_index < hfp_gsm_get_number_of_calls()){ 2018 hfp_connection->next_call_index++; 2019 hfp_ag_send_call_status(hfp_connection, hfp_connection->next_call_index); 2020 return 1; 2021 } else { 2022 // 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 2023 hfp_connection->next_call_index = 0; 2024 hfp_connection->ok_pending = 1; 2025 hfp_connection->send_status_of_current_calls = 0; 2026 } 2027 } 2028 2029 if (hfp_connection->ag_notify_incoming_call_waiting){ 2030 hfp_connection->ag_notify_incoming_call_waiting = 0; 2031 hfp_ag_send_call_waiting_notification(hfp_connection->rfcomm_cid); 2032 return 1; 2033 } 2034 2035 if (hfp_connection->command == HFP_CMD_UNKNOWN){ 2036 hfp_connection->ok_pending = 0; 2037 hfp_connection->send_error = 0; 2038 hfp_connection->command = HFP_CMD_NONE; 2039 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2040 return 1; 2041 } 2042 2043 if (hfp_connection->send_error){ 2044 hfp_connection->send_error = 0; 2045 hfp_connection->command = HFP_CMD_NONE; 2046 hfp_ag_send_error(hfp_connection->rfcomm_cid); 2047 return 1; 2048 } 2049 2050 // note: before update AG indicators and ok_pending 2051 if (hfp_connection->send_response_and_hold_status){ 2052 int status = hfp_connection->send_response_and_hold_status - 1; 2053 hfp_connection->send_response_and_hold_status = 0; 2054 hfp_ag_send_set_response_and_hold(hfp_connection->rfcomm_cid, status); 2055 return 1; 2056 } 2057 2058 if (hfp_connection->ok_pending){ 2059 hfp_connection->ok_pending = 0; 2060 hfp_connection->command = HFP_CMD_NONE; 2061 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2062 return 1; 2063 } 2064 2065 // update AG indicators 2066 if (hfp_connection->ag_indicators_status_update_bitmap){ 2067 int i; 2068 for (i=0;i<hfp_connection->ag_indicators_nr;i++){ 2069 if (get_bit(hfp_connection->ag_indicators_status_update_bitmap, i)){ 2070 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, i, 0); 2071 if (!hfp_connection->enable_status_update_for_ag_indicators) { 2072 log_info("+CMER:3,0,0,0 - not sending update for '%s'", hfp_ag_indicators[i].name); 2073 break; 2074 } 2075 hfp_ag_send_transfer_ag_indicators_status_cmd(hfp_connection->rfcomm_cid, &hfp_ag_indicators[i]); 2076 return 1; 2077 } 2078 } 2079 } 2080 2081 if (hfp_connection->ag_send_no_carrier){ 2082 hfp_connection->ag_send_no_carrier = false; 2083 hfp_ag_send_no_carrier(hfp_connection->rfcomm_cid); 2084 return 1; 2085 } 2086 2087 if (hfp_connection->ag_ring){ 2088 hfp_connection->ag_ring = 0; 2089 hfp_connection->command = HFP_CMD_NONE; 2090 hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_RING); 2091 hfp_ag_send_ring(hfp_connection->rfcomm_cid); 2092 return 1; 2093 } 2094 2095 if (hfp_connection->ag_send_clip){ 2096 hfp_connection->ag_send_clip = 0; 2097 hfp_connection->command = HFP_CMD_NONE; 2098 hfp_ag_send_clip(hfp_connection->rfcomm_cid); 2099 return 1; 2100 } 2101 2102 if (hfp_connection->send_phone_number_for_voice_tag){ 2103 hfp_connection->send_phone_number_for_voice_tag = 0; 2104 hfp_connection->command = HFP_CMD_NONE; 2105 hfp_connection->ok_pending = 1; 2106 hfp_ag_send_phone_number_for_voice_tag_cmd(hfp_connection->rfcomm_cid); 2107 return 1; 2108 } 2109 2110 if (hfp_connection->send_subscriber_number){ 2111 if (hfp_connection->next_subscriber_number_to_send < hfp_ag_subscriber_numbers_count){ 2112 hfp_phone_number_t phone = hfp_ag_subscriber_numbers[hfp_connection->next_subscriber_number_to_send++]; 2113 hfp_send_subscriber_number_cmd(hfp_connection->rfcomm_cid, phone.type, phone.number); 2114 } else { 2115 hfp_connection->send_subscriber_number = 0; 2116 hfp_connection->next_subscriber_number_to_send = 0; 2117 hfp_ag_send_ok(hfp_connection->rfcomm_cid); 2118 } 2119 hfp_connection->command = HFP_CMD_NONE; 2120 return 1; 2121 } 2122 2123 if (hfp_connection->send_microphone_gain){ 2124 hfp_connection->send_microphone_gain = 0; 2125 hfp_connection->command = HFP_CMD_NONE; 2126 hfp_ag_send_set_microphone_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->microphone_gain); 2127 return 1; 2128 } 2129 2130 if (hfp_connection->send_speaker_gain){ 2131 hfp_connection->send_speaker_gain = 0; 2132 hfp_connection->command = HFP_CMD_NONE; 2133 hfp_ag_send_set_speaker_gain_cmd(hfp_connection->rfcomm_cid, hfp_connection->speaker_gain); 2134 return 1; 2135 } 2136 2137 if (hfp_connection->send_ag_status_indicators){ 2138 hfp_connection->send_ag_status_indicators = 0; 2139 hfp_ag_send_retrieve_indicators_status_cmd(hfp_connection->rfcomm_cid); 2140 return 1; 2141 } 2142 2143 return 0; 2144 } 2145 2146 static void hfp_ag_run_for_context(hfp_connection_t *hfp_connection){ 2147 2148 btstack_assert(hfp_connection != NULL); 2149 btstack_assert(hfp_connection->local_role == HFP_ROLE_AG); 2150 2151 // during SDP query, RFCOMM CID is not set 2152 if (hfp_connection->rfcomm_cid == 0) return; 2153 2154 // assert command could be sent 2155 if (hci_can_send_command_packet_now() == 0) return; 2156 2157 if ((hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED) && hfp_connection->release_audio_connection){ 2158 hfp_connection->state = HFP_W4_SCO_DISCONNECTED; 2159 hfp_connection->release_audio_connection = 0; 2160 gap_disconnect(hfp_connection->sco_handle); 2161 return; 2162 } 2163 2164 #ifdef ENABLE_CC256X_ASSISTED_HFP 2165 // WBS Disassociate 2166 if (hfp_connection->cc256x_send_wbs_disassociate){ 2167 hfp_connection->cc256x_send_wbs_disassociate = false; 2168 hci_send_cmd(&hci_ti_wbs_disassociate); 2169 return; 2170 } 2171 // Write Codec Config 2172 if (hfp_connection->cc256x_send_write_codec_config){ 2173 hfp_connection->cc256x_send_write_codec_config = false; 2174 hfp_cc256x_write_codec_config(hfp_connection); 2175 return; 2176 } 2177 // WBS Associate 2178 if (hfp_connection->cc256x_send_wbs_associate){ 2179 hfp_connection->cc256x_send_wbs_associate = false; 2180 hci_send_cmd(&hci_ti_wbs_associate, hfp_connection->acl_handle); 2181 return; 2182 } 2183 #endif 2184 #ifdef ENABLE_BCM_PCM_WBS 2185 // Enable WBS 2186 if (hfp_connection->bcm_send_enable_wbs){ 2187 hfp_connection->bcm_send_enable_wbs = false; 2188 hci_send_cmd(&hci_bcm_enable_wbs, 1, 2); 2189 return; 2190 } 2191 // Write I2S/PCM params 2192 if (hfp_connection->bcm_send_write_i2spcm_interface_param){ 2193 hfp_connection->bcm_send_write_i2spcm_interface_param = false; 2194 hfp_bcm_write_i2spcm_interface_param(hfp_connection); 2195 return; 2196 } 2197 // Disable WBS 2198 if (hfp_connection->bcm_send_disable_wbs){ 2199 hfp_connection->bcm_send_disable_wbs = false; 2200 hci_send_cmd(&hci_bcm_enable_wbs, 0, 2); 2201 return; 2202 } 2203 #endif 2204 #if defined (ENABLE_CC256X_ASSISTED_HFP) || defined (ENABLE_BCM_PCM_WBS) 2205 if (hfp_connection->state == HFP_W4_WBS_SHUTDOWN){ 2206 hfp_finalize_connection_context(hfp_connection); 2207 return; 2208 } 2209 #endif 2210 2211 if (!rfcomm_can_send_packet_now(hfp_connection->rfcomm_cid)) { 2212 log_info("hfp_ag_run_for_context: request can send for 0x%02x", hfp_connection->rfcomm_cid); 2213 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2214 return; 2215 } 2216 2217 int cmd_sent = hfp_ag_send_commands(hfp_connection); 2218 2219 if (!cmd_sent){ 2220 cmd_sent = hfp_ag_run_for_context_service_level_connection(hfp_connection); 2221 } 2222 2223 if (!cmd_sent){ 2224 cmd_sent = hfp_ag_run_for_context_service_level_connection_queries(hfp_connection); 2225 } 2226 2227 if (!cmd_sent){ 2228 cmd_sent = call_setup_state_machine(hfp_connection); 2229 } 2230 2231 if (!cmd_sent){ 2232 cmd_sent = hfp_ag_run_for_audio_connection(hfp_connection); 2233 } 2234 2235 if (!cmd_sent){ 2236 cmd_sent = hfp_ag_voice_recognition_state_machine(hfp_connection); 2237 } 2238 2239 // disconnect 2240 if (!cmd_sent && (hfp_connection->command == HFP_CMD_NONE) && (hfp_connection->state == HFP_W2_DISCONNECT_RFCOMM)){ 2241 hfp_connection->state = HFP_W4_RFCOMM_DISCONNECTED; 2242 rfcomm_disconnect(hfp_connection->rfcomm_cid); 2243 } 2244 2245 if (cmd_sent){ 2246 hfp_connection->command = HFP_CMD_NONE; 2247 rfcomm_request_can_send_now_event(hfp_connection->rfcomm_cid); 2248 } 2249 } 2250 2251 static int hfp_parser_is_end_of_line(uint8_t byte){ 2252 return (byte == '\n') || (byte == '\r'); 2253 } 2254 2255 static void hfp_ag_handle_rfcomm_data(hfp_connection_t * hfp_connection, uint8_t *packet, uint16_t size){ 2256 // assertion: size >= 1 as rfcomm.c does not deliver empty packets 2257 if (size < 1) return; 2258 uint8_t status = ERROR_CODE_SUCCESS; 2259 2260 hfp_log_rfcomm_message("HFP_AG_RX", packet, size); 2261 #ifdef ENABLE_HFP_AT_MESSAGES 2262 hfp_emit_string_event(hfp_connection, HFP_SUBEVENT_AT_MESSAGE_RECEIVED, (char *) packet); 2263 #endif 2264 2265 // process messages byte-wise 2266 int pos; 2267 for (pos = 0; pos < size ; pos++){ 2268 hfp_parse(hfp_connection, packet[pos], 0); 2269 2270 // parse until end of line 2271 if (!hfp_parser_is_end_of_line(packet[pos])) continue; 2272 2273 hfp_generic_status_indicator_t * indicator; 2274 switch(hfp_connection->command){ 2275 case HFP_CMD_HF_ACTIVATE_VOICE_RECOGNITION: 2276 // dealt with in hfp_ag_voice_recognition_state_machine 2277 break; 2278 case HFP_CMD_RESPONSE_AND_HOLD_QUERY: 2279 if (hfp_ag_response_and_hold_active){ 2280 hfp_connection->send_response_and_hold_status = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD + 1; 2281 } 2282 hfp_connection->ok_pending = 1; 2283 break; 2284 case HFP_CMD_RESPONSE_AND_HOLD_COMMAND: 2285 switch(hfp_connection->ag_response_and_hold_action){ 2286 case HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD: 2287 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_HF, hfp_connection); 2288 break; 2289 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_ACCEPTED: 2290 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_HF, hfp_connection); 2291 break; 2292 case HFP_RESPONSE_AND_HOLD_HELD_INCOMING_REJECTED: 2293 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_HF, hfp_connection); 2294 break; 2295 default: 2296 break; 2297 } 2298 hfp_connection->ok_pending = 1; 2299 break; 2300 case HFP_CMD_HF_INDICATOR_STATUS: 2301 hfp_connection->command = HFP_CMD_NONE; 2302 2303 if (hfp_connection->parser_indicator_index < hfp_ag_generic_status_indicators_nr){ 2304 indicator = &hfp_ag_generic_status_indicators[hfp_connection->parser_indicator_index]; 2305 switch (indicator->uuid){ 2306 case HFP_HF_INDICATOR_UUID_ENHANCED_SAFETY: 2307 if (hfp_connection->parser_indicator_value > 1) { 2308 hfp_connection->send_error = 1; 2309 break; 2310 } 2311 hfp_connection->ok_pending = 1; 2312 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2313 break; 2314 case HFP_HF_INDICATOR_UUID_BATTERY_LEVEL: 2315 if (hfp_connection->parser_indicator_value > 100){ 2316 hfp_connection->send_error = 1; 2317 break; 2318 } 2319 hfp_connection->ok_pending = 1; 2320 hfp_ag_emit_hf_indicator_value(hfp_connection, indicator->uuid, hfp_connection->parser_indicator_value); 2321 break; 2322 default: 2323 hfp_connection->send_error = 1; 2324 break; 2325 } 2326 } else { 2327 hfp_connection->send_error = 1; 2328 } 2329 break; 2330 case HFP_CMD_RETRIEVE_AG_INDICATORS_STATUS: 2331 // expected by SLC state machine 2332 if (hfp_connection->state < HFP_SERVICE_LEVEL_CONNECTION_ESTABLISHED) break; 2333 hfp_connection->send_ag_indicators_segment = 0; 2334 hfp_connection->send_ag_status_indicators = 1; 2335 break; 2336 case HFP_CMD_LIST_CURRENT_CALLS: 2337 hfp_connection->command = HFP_CMD_NONE; 2338 hfp_connection->next_call_index = 0; 2339 hfp_connection->send_status_of_current_calls = 1; 2340 break; 2341 case HFP_CMD_GET_SUBSCRIBER_NUMBER_INFORMATION: 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 default: 2451 break; 2452 } 2453 } 2454 } 2455 2456 static void hfp_ag_run(void){ 2457 btstack_linked_list_iterator_t it; 2458 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2459 while (btstack_linked_list_iterator_has_next(&it)){ 2460 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2461 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2462 hfp_ag_run_for_context(hfp_connection); 2463 } 2464 } 2465 2466 static void hfp_ag_rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2467 hfp_connection_t * hfp_connection = NULL; 2468 switch (packet_type){ 2469 case RFCOMM_DATA_PACKET: 2470 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(channel); 2471 btstack_assert(hfp_connection != NULL); 2472 2473 hfp_ag_handle_rfcomm_data(hfp_connection, packet, size); 2474 hfp_ag_run_for_context(hfp_connection); 2475 return; 2476 case HCI_EVENT_PACKET: 2477 if (packet[0] == RFCOMM_EVENT_CAN_SEND_NOW){ 2478 uint16_t rfcomm_cid = rfcomm_event_can_send_now_get_rfcomm_cid(packet); 2479 hfp_connection = get_hfp_connection_context_for_rfcomm_cid(rfcomm_cid); 2480 btstack_assert(hfp_connection != NULL); 2481 2482 hfp_ag_run_for_context(hfp_connection); 2483 return; 2484 } 2485 hfp_handle_rfcomm_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2486 break; 2487 default: 2488 break; 2489 } 2490 2491 hfp_ag_run(); 2492 } 2493 2494 static void hfp_ag_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2495 hfp_handle_hci_event(packet_type, channel, packet, size, HFP_ROLE_AG); 2496 hfp_ag_run(); 2497 } 2498 2499 void hfp_ag_init_codecs(int codecs_nr, const uint8_t * codecs){ 2500 if (codecs_nr > HFP_MAX_NUM_CODECS){ 2501 log_error("hfp_init: codecs_nr (%d) > HFP_MAX_NUM_CODECS (%d)", codecs_nr, HFP_MAX_NUM_CODECS); 2502 return; 2503 } 2504 int i; 2505 hfp_ag_codecs_nr = codecs_nr; 2506 for (i=0; i < codecs_nr; i++){ 2507 hfp_ag_codecs[i] = codecs[i]; 2508 } 2509 } 2510 2511 void hfp_ag_init_supported_features(uint32_t supported_features){ 2512 hfp_ag_supported_features = supported_features; 2513 } 2514 2515 void hfp_ag_init_ag_indicators(int ag_indicators_nr, const hfp_ag_indicator_t * ag_indicators){ 2516 hfp_ag_indicators_nr = ag_indicators_nr; 2517 (void)memcpy(hfp_ag_indicators, ag_indicators, 2518 ag_indicators_nr * sizeof(hfp_ag_indicator_t)); 2519 } 2520 2521 void hfp_ag_init_hf_indicators(int hf_indicators_nr, const hfp_generic_status_indicator_t * hf_indicators){ 2522 if (hf_indicators_nr > HFP_MAX_NUM_INDICATORS) return; 2523 hfp_ag_generic_status_indicators_nr = hf_indicators_nr; 2524 (void)memcpy(hfp_ag_generic_status_indicators, hf_indicators, 2525 hf_indicators_nr * sizeof(hfp_generic_status_indicator_t)); 2526 } 2527 2528 void hfp_ag_init_call_hold_services(int call_hold_services_nr, const char * call_hold_services[]){ 2529 hfp_ag_call_hold_services_nr = call_hold_services_nr; 2530 (void)memcpy(hfp_ag_call_hold_services, call_hold_services, 2531 call_hold_services_nr * sizeof(char *)); 2532 } 2533 2534 2535 void hfp_ag_init(uint16_t rfcomm_channel_nr){ 2536 2537 hfp_init(); 2538 hfp_ag_call_hold_services_nr = 0; 2539 hfp_ag_response_and_hold_active = 0; 2540 hfp_ag_indicators_nr = 0; 2541 hfp_ag_codecs_nr = 0; 2542 hfp_ag_supported_features = HFP_DEFAULT_AG_SUPPORTED_FEATURES; 2543 hfp_ag_subscriber_numbers = NULL; 2544 hfp_ag_subscriber_numbers_count = 0; 2545 2546 hfp_ag_hci_event_callback_registration.callback = &hfp_ag_hci_event_packet_handler; 2547 hci_add_event_handler(&hfp_ag_hci_event_callback_registration); 2548 2549 rfcomm_register_service(&hfp_ag_rfcomm_packet_handler, rfcomm_channel_nr, 0xffff); 2550 2551 // used to set packet handler for outgoing rfcomm connections - could be handled by emitting an event to us 2552 hfp_set_ag_rfcomm_packet_handler(&hfp_ag_rfcomm_packet_handler); 2553 2554 hfp_gsm_init(); 2555 } 2556 2557 void hfp_ag_deinit(void){ 2558 hfp_deinit(); 2559 hfp_gsm_deinit(); 2560 2561 hfp_ag_callback = NULL; 2562 hfp_ag_supported_features = 0; 2563 hfp_ag_codecs_nr = 0; 2564 hfp_ag_indicators_nr = 0; 2565 hfp_ag_call_hold_services_nr = 0; 2566 (void) memset(&hfp_ag_call_hold_services, 0, sizeof(hfp_ag_call_hold_services)); 2567 hfp_ag_response_and_hold_state = HFP_RESPONSE_AND_HOLD_INCOMING_ON_HOLD; 2568 (void) memset(&hfp_ag_response_and_hold_state, 0, sizeof(hfp_response_and_hold_state_t)); 2569 hfp_ag_subscriber_numbers = NULL; 2570 (void) memset(&hfp_ag_hci_event_callback_registration, 0, sizeof(btstack_packet_callback_registration_t)); 2571 } 2572 2573 uint8_t hfp_ag_establish_service_level_connection(bd_addr_t bd_addr){ 2574 return hfp_establish_service_level_connection(bd_addr, BLUETOOTH_SERVICE_CLASS_HANDSFREE, HFP_ROLE_AG); 2575 } 2576 2577 uint8_t hfp_ag_release_service_level_connection(hci_con_handle_t acl_handle){ 2578 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2579 if (!hfp_connection){ 2580 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2581 } 2582 2583 hfp_trigger_release_service_level_connection(hfp_connection); 2584 hfp_ag_run_for_context(hfp_connection); 2585 return ERROR_CODE_SUCCESS; 2586 } 2587 2588 uint8_t hfp_ag_report_extended_audio_gateway_error_result_code(hci_con_handle_t acl_handle, hfp_cme_error_t error){ 2589 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2590 if (!hfp_connection){ 2591 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2592 } 2593 2594 hfp_connection->extended_audio_gateway_error = 0; 2595 if (!hfp_connection->enable_extended_audio_gateway_error_report){ 2596 return ERROR_CODE_COMMAND_DISALLOWED; 2597 } 2598 2599 hfp_connection->extended_audio_gateway_error = error; 2600 hfp_ag_run_for_context(hfp_connection); 2601 return ERROR_CODE_SUCCESS; 2602 } 2603 2604 static uint8_t hfp_ag_setup_audio_connection(hfp_connection_t * hfp_connection){ 2605 if (hfp_connection->state == HFP_AUDIO_CONNECTION_ESTABLISHED){ 2606 return ERROR_CODE_COMMAND_DISALLOWED; 2607 } 2608 if (hfp_connection->state >= HFP_W2_DISCONNECT_SCO){ 2609 return ERROR_CODE_COMMAND_DISALLOWED; 2610 } 2611 2612 hfp_connection->establish_audio_connection = 1; 2613 if (!has_codec_negotiation_feature(hfp_connection)){ 2614 log_info("hfp_ag_establish_audio_connection - no codec negotiation feature, using CVSD"); 2615 hfp_connection->negotiated_codec = HFP_CODEC_CVSD; 2616 hfp_connection->codecs_state = HFP_CODECS_EXCHANGED; 2617 // now, pick link settings 2618 hfp_init_link_settings(hfp_connection, hfp_ag_esco_s4_supported(hfp_connection)); 2619 #ifdef ENABLE_CC256X_ASSISTED_HFP 2620 hfp_cc256x_prepare_for_sco(hfp_connection); 2621 #endif 2622 return ERROR_CODE_SUCCESS; 2623 } 2624 2625 uint8_t i; 2626 bool codec_was_in_use = false; 2627 bool better_codec_can_be_used = false; 2628 2629 for (i = 0; i<hfp_connection->remote_codecs_nr; i++){ 2630 if (hfp_connection->negotiated_codec == hfp_connection->remote_codecs[i]){ 2631 codec_was_in_use = true; 2632 } else if (hfp_connection->negotiated_codec < hfp_connection->remote_codecs[i]){ 2633 better_codec_can_be_used = true; 2634 } 2635 } 2636 2637 if (!codec_was_in_use || better_codec_can_be_used){ 2638 hfp_connection->ag_send_common_codec = true; 2639 hfp_connection->codecs_state = HFP_CODECS_IDLE; 2640 } 2641 return ERROR_CODE_SUCCESS; 2642 } 2643 2644 uint8_t hfp_ag_establish_audio_connection(hci_con_handle_t acl_handle){ 2645 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2646 if (!hfp_connection){ 2647 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2648 } 2649 uint8_t status = hfp_ag_setup_audio_connection(hfp_connection); 2650 if (status != ERROR_CODE_SUCCESS){ 2651 return status; 2652 } 2653 hfp_ag_run_for_context(hfp_connection); 2654 return ERROR_CODE_SUCCESS; 2655 } 2656 2657 uint8_t hfp_ag_release_audio_connection(hci_con_handle_t acl_handle){ 2658 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2659 if (!hfp_connection){ 2660 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2661 } 2662 2663 if (hfp_connection->vra_state == HFP_VRA_VOICE_RECOGNITION_ACTIVATED){ 2664 return ERROR_CODE_COMMAND_DISALLOWED; 2665 } 2666 2667 uint8_t status = hfp_trigger_release_audio_connection(hfp_connection); 2668 if (status == ERROR_CODE_SUCCESS){ 2669 hfp_ag_run_for_context(hfp_connection); 2670 } 2671 return status; 2672 } 2673 2674 /** 2675 * @brief Enable in-band ring tone 2676 */ 2677 void hfp_ag_set_use_in_band_ring_tone(int use_in_band_ring_tone){ 2678 if (get_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE) == use_in_band_ring_tone){ 2679 return; 2680 } 2681 2682 hfp_ag_supported_features = store_bit(hfp_ag_supported_features, HFP_AGSF_IN_BAND_RING_TONE, use_in_band_ring_tone); 2683 2684 btstack_linked_list_iterator_t it; 2685 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2686 while (btstack_linked_list_iterator_has_next(&it)){ 2687 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2688 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2689 hfp_connection->ag_send_in_band_ring_tone_setting = true; 2690 hfp_ag_run_for_context(hfp_connection); 2691 } 2692 } 2693 2694 /** 2695 * @brief Called from GSM 2696 */ 2697 void hfp_ag_incoming_call(void){ 2698 hfp_ag_call_sm(HFP_AG_INCOMING_CALL, NULL); 2699 } 2700 2701 void hfp_ag_outgoing_call_initiated(const char * number) { 2702 UNUSED(number); 2703 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_INITIATED_BY_AG, NULL); 2704 } 2705 2706 /** 2707 * @brief number is stored. 2708 */ 2709 void hfp_ag_set_clip(uint8_t type, const char * number){ 2710 hfp_gsm_handler(HFP_AG_SET_CLIP, 0, type, number); 2711 } 2712 2713 void hfp_ag_call_dropped(void){ 2714 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2715 } 2716 2717 // call from AG UI 2718 void hfp_ag_answer_incoming_call(void){ 2719 hfp_ag_call_sm(HFP_AG_INCOMING_CALL_ACCEPTED_BY_AG, NULL); 2720 } 2721 2722 void hfp_ag_join_held_call(void){ 2723 hfp_ag_call_sm(HFP_AG_HELD_CALL_JOINED_BY_AG, NULL); 2724 } 2725 2726 void hfp_ag_terminate_call(void){ 2727 hfp_ag_call_sm(HFP_AG_TERMINATE_CALL_BY_AG, NULL); 2728 } 2729 2730 void hfp_ag_outgoing_call_ringing(void){ 2731 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_RINGING, NULL); 2732 } 2733 2734 void hfp_ag_outgoing_call_established(void){ 2735 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ESTABLISHED, NULL); 2736 } 2737 2738 void hfp_ag_outgoing_call_rejected(void){ 2739 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_REJECTED, NULL); 2740 } 2741 2742 void hfp_ag_outgoing_call_accepted(void){ 2743 hfp_ag_call_sm(HFP_AG_OUTGOING_CALL_ACCEPTED, NULL); 2744 } 2745 2746 void hfp_ag_hold_incoming_call(void){ 2747 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_INCOMING_CALL_BY_AG, NULL); 2748 } 2749 2750 void hfp_ag_accept_held_incoming_call(void) { 2751 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_ACCEPT_HELD_CALL_BY_AG, NULL); 2752 } 2753 2754 void hfp_ag_reject_held_incoming_call(void){ 2755 hfp_ag_call_sm(HFP_AG_RESPONSE_AND_HOLD_REJECT_HELD_CALL_BY_AG, NULL); 2756 } 2757 2758 static void hfp_ag_set_ag_indicator(const char * name, int value){ 2759 int indicator_index = get_ag_indicator_index_for_name(name); 2760 if (indicator_index < 0) return; 2761 hfp_ag_indicators[indicator_index].status = value; 2762 2763 btstack_linked_list_iterator_t it; 2764 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2765 while (btstack_linked_list_iterator_has_next(&it)){ 2766 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2767 if (hfp_connection->local_role != HFP_ROLE_AG) continue; 2768 if (!hfp_connection->ag_indicators[indicator_index].enabled) { 2769 log_info("Requested AG indicator '%s' update to %u, but it is not enabled", hfp_ag_indicators[indicator_index].name, value); 2770 continue; 2771 } 2772 log_info("AG indicator '%s' changed to %u, request transfer status", hfp_ag_indicators[indicator_index].name, value); 2773 hfp_connection->ag_indicators_status_update_bitmap = store_bit(hfp_connection->ag_indicators_status_update_bitmap, indicator_index, 1); 2774 hfp_ag_run_for_context(hfp_connection); 2775 } 2776 } 2777 2778 uint8_t hfp_ag_set_registration_status(int registration_status){ 2779 if ((registration_status < 0) || (registration_status > 1)){ 2780 return ERROR_CODE_COMMAND_DISALLOWED; 2781 } 2782 2783 if ( (registration_status == 0) && (hfp_gsm_call_status() == HFP_CALL_STATUS_ACTIVE_OR_HELD_CALL_IS_PRESENT)){ 2784 2785 // if network goes away wihle a call is active: 2786 // - the call gets dropped 2787 // - we send NO CARRIER 2788 // NOTE: the CALL=0 has to be sent before NO CARRIER 2789 2790 hfp_ag_call_sm(HFP_AG_CALL_DROPPED, NULL); 2791 2792 btstack_linked_list_iterator_t it; 2793 btstack_linked_list_iterator_init(&it, hfp_get_connections()); 2794 while (btstack_linked_list_iterator_has_next(&it)){ 2795 hfp_connection_t * hfp_connection = (hfp_connection_t *)btstack_linked_list_iterator_next(&it); 2796 hfp_connection->ag_send_no_carrier = true; 2797 } 2798 } 2799 hfp_ag_set_ag_indicator("service", registration_status); 2800 return ERROR_CODE_SUCCESS; 2801 } 2802 2803 uint8_t hfp_ag_set_signal_strength(int signal_strength){ 2804 if ((signal_strength < 0) || (signal_strength > 5)){ 2805 return ERROR_CODE_COMMAND_DISALLOWED; 2806 } 2807 2808 hfp_ag_set_ag_indicator("signal", signal_strength); 2809 return ERROR_CODE_SUCCESS; 2810 } 2811 2812 uint8_t hfp_ag_set_roaming_status(int roaming_status){ 2813 if ((roaming_status < 0) || (roaming_status > 1)){ 2814 return ERROR_CODE_COMMAND_DISALLOWED; 2815 } 2816 2817 hfp_ag_set_ag_indicator("roam", roaming_status); 2818 return ERROR_CODE_SUCCESS; 2819 } 2820 2821 uint8_t hfp_ag_set_battery_level(int battery_level){ 2822 if ((battery_level < 0) || (battery_level > 5)){ 2823 return ERROR_CODE_COMMAND_DISALLOWED; 2824 } 2825 hfp_ag_set_ag_indicator("battchg", battery_level); 2826 return ERROR_CODE_SUCCESS; 2827 } 2828 2829 uint8_t hfp_ag_activate_voice_recognition(hci_con_handle_t acl_handle){ 2830 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2831 if (!hfp_connection){ 2832 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2833 } 2834 2835 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2836 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2837 if (!enhanced_vra_supported && !legacy_vra_supported){ 2838 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2839 } 2840 2841 if (!hfp_ag_can_activate_voice_recognition(hfp_connection)){ 2842 return ERROR_CODE_COMMAND_DISALLOWED; 2843 } 2844 2845 hfp_connection->ag_activate_voice_recognition_value = 1; 2846 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_ACTIVATED; 2847 hfp_connection->enhanced_voice_recognition_enabled = enhanced_vra_supported; 2848 hfp_connection->ag_audio_connection_opened_before_vra = hfp_ag_is_audio_connection_active(hfp_connection); 2849 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2850 hfp_connection->ag_vra_send_command = true; 2851 hfp_ag_run_for_context(hfp_connection); 2852 return ERROR_CODE_SUCCESS; 2853 } 2854 2855 uint8_t hfp_ag_deactivate_voice_recognition(hci_con_handle_t acl_handle){ 2856 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2857 if (!hfp_connection){ 2858 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2859 } 2860 2861 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2862 bool legacy_vra_supported = hfp_ag_vra_flag_supported(hfp_connection); 2863 2864 if (!enhanced_vra_supported && !legacy_vra_supported){ 2865 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2866 } 2867 2868 if (!hfp_ag_voice_recognition_session_active(hfp_connection)){ 2869 return ERROR_CODE_COMMAND_DISALLOWED; 2870 } 2871 2872 hfp_connection->ag_activate_voice_recognition_value = 0; 2873 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_VOICE_RECOGNITION_OFF; 2874 hfp_connection->ag_vra_state = HFP_VOICE_RECOGNITION_STATE_AG_READY; 2875 hfp_connection->ag_vra_send_command = true; 2876 hfp_ag_run_for_context(hfp_connection); 2877 return ERROR_CODE_SUCCESS; 2878 } 2879 2880 static uint8_t hfp_ag_enhanced_voice_recognition_send_state(hci_con_handle_t acl_handle, hfp_voice_recognition_state_t state){ 2881 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2882 if (!hfp_connection){ 2883 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2884 } 2885 2886 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2887 if (!enhanced_vra_supported ){ 2888 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2889 } 2890 2891 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2892 return ERROR_CODE_COMMAND_DISALLOWED; 2893 } 2894 2895 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2896 return ERROR_CODE_COMMAND_DISALLOWED; 2897 } 2898 2899 hfp_connection->ag_vra_state = state; 2900 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_STATUS; 2901 hfp_connection->ag_vra_send_command = true; 2902 hfp_ag_run_for_context(hfp_connection); 2903 return ERROR_CODE_SUCCESS; 2904 } 2905 2906 uint8_t hfp_ag_enhanced_voice_recognition_report_sending_audio(hci_con_handle_t acl_handle){ 2907 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_STARTING_SOUND); 2908 } 2909 uint8_t hfp_ag_enhanced_voice_recognition_report_ready_for_audio(hci_con_handle_t acl_handle){ 2910 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_READY_TO_ACCEPT_AUDIO_INPUT); 2911 } 2912 uint8_t hfp_ag_enhanced_voice_recognition_report_processing_input(hci_con_handle_t acl_handle){ 2913 return hfp_ag_enhanced_voice_recognition_send_state(acl_handle, HFP_VOICE_RECOGNITION_STATE_AG_IS_PROCESSING_AUDIO_INPUT); 2914 } 2915 2916 2917 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){ 2918 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2919 if (!hfp_connection){ 2920 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2921 } 2922 2923 bool enhanced_vra_supported = hfp_ag_enhanced_vra_flag_supported(hfp_connection); 2924 if (!enhanced_vra_supported ){ 2925 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2926 } 2927 2928 bool enhanced_vra_msg_supported = hfp_ag_can_send_enhanced_vra_message_flag_supported(hfp_connection); 2929 if (!enhanced_vra_msg_supported ){ 2930 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2931 } 2932 2933 if (hfp_connection->state != HFP_AUDIO_CONNECTION_ESTABLISHED){ 2934 return ERROR_CODE_COMMAND_DISALLOWED; 2935 } 2936 2937 if (hfp_connection->vra_state != HFP_VRA_ENHANCED_VOICE_RECOGNITION_READY_FOR_AUDIO){ 2938 return ERROR_CODE_COMMAND_DISALLOWED; 2939 } 2940 2941 uint16_t message_len = strlen(msg.text); 2942 2943 if (message_len > HFP_MAX_VR_TEXT_SIZE){ 2944 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2945 } 2946 2947 if ((HFP_VR_TEXT_HEADER_SIZE + message_len) > hfp_connection->rfcomm_mtu){ 2948 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2949 } 2950 2951 hfp_connection->vra_state_requested = HFP_VRA_W2_SEND_ENHANCED_VOICE_RECOGNITION_MSG; 2952 hfp_connection->ag_msg = msg; 2953 hfp_connection->ag_vra_state = state; 2954 hfp_connection->ag_vra_send_command = true; 2955 hfp_ag_run_for_context(hfp_connection); 2956 2957 return ERROR_CODE_SUCCESS; 2958 } 2959 2960 2961 uint8_t hfp_ag_set_microphone_gain(hci_con_handle_t acl_handle, int gain){ 2962 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2963 if (!hfp_connection){ 2964 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2965 } 2966 2967 if ((gain < 0) || (gain > 15)){ 2968 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 2969 return ERROR_CODE_COMMAND_DISALLOWED; 2970 } 2971 2972 if (hfp_connection->microphone_gain != gain){ 2973 hfp_connection->microphone_gain = gain; 2974 hfp_connection->send_microphone_gain = 1; 2975 } 2976 hfp_ag_run_for_context(hfp_connection); 2977 return ERROR_CODE_SUCCESS; 2978 } 2979 2980 uint8_t hfp_ag_set_speaker_gain(hci_con_handle_t acl_handle, int gain){ 2981 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 2982 if (!hfp_connection){ 2983 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2984 } 2985 2986 if ((gain < 0) || (gain > 15)){ 2987 log_info("Valid range for a gain is [0..15]. Currently sent: %d", gain); 2988 return ERROR_CODE_COMMAND_DISALLOWED; 2989 } 2990 2991 if (hfp_connection->speaker_gain != gain){ 2992 hfp_connection->speaker_gain = gain; 2993 hfp_connection->send_speaker_gain = 1; 2994 } 2995 hfp_ag_run_for_context(hfp_connection); 2996 return ERROR_CODE_SUCCESS; 2997 } 2998 2999 uint8_t hfp_ag_send_phone_number_for_voice_tag(hci_con_handle_t acl_handle, const char * number){ 3000 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3001 if (!hfp_connection){ 3002 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3003 } 3004 3005 hfp_ag_set_clip(0, number); 3006 hfp_connection->send_phone_number_for_voice_tag = 1; 3007 return ERROR_CODE_SUCCESS; 3008 } 3009 3010 uint8_t hfp_ag_reject_phone_number_for_voice_tag(hci_con_handle_t acl_handle){ 3011 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3012 if (!hfp_connection){ 3013 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3014 } 3015 3016 hfp_connection->send_error = 1; 3017 return ERROR_CODE_SUCCESS; 3018 } 3019 3020 uint8_t hfp_ag_send_dtmf_code_done(hci_con_handle_t acl_handle){ 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_connection->ok_pending = 1; 3027 return ERROR_CODE_SUCCESS; 3028 } 3029 3030 void hfp_ag_set_subcriber_number_information(hfp_phone_number_t * numbers, int numbers_count){ 3031 hfp_ag_subscriber_numbers = numbers; 3032 hfp_ag_subscriber_numbers_count = numbers_count; 3033 } 3034 3035 void hfp_ag_clear_last_dialed_number(void){ 3036 hfp_gsm_clear_last_dialed_number(); 3037 } 3038 3039 void hfp_ag_set_last_dialed_number(const char * number){ 3040 hfp_gsm_set_last_dialed_number(number); 3041 } 3042 3043 uint8_t hfp_ag_notify_incoming_call_waiting(hci_con_handle_t acl_handle){ 3044 hfp_connection_t * hfp_connection = get_hfp_ag_connection_context_for_acl_handle(acl_handle); 3045 if (!hfp_connection){ 3046 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3047 } 3048 3049 if (!hfp_connection->call_waiting_notification_enabled){ 3050 return ERROR_CODE_COMMAND_DISALLOWED; 3051 } 3052 3053 hfp_connection->ag_notify_incoming_call_waiting = 1; 3054 hfp_ag_run_for_context(hfp_connection); 3055 return ERROR_CODE_SUCCESS; 3056 } 3057 3058 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){ 3059 if (!name){ 3060 name = hfp_ag_default_service_name; 3061 } 3062 hfp_create_sdp_record(service, service_record_handle, BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY, rfcomm_channel_nr, name); 3063 3064 /* 3065 * 0x01 – Ability to reject a call 3066 * 0x00 – No ability to reject a call 3067 */ 3068 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0301); // Hands-Free Profile - Network 3069 de_add_number(service, DE_UINT, DE_SIZE_8, ability_to_reject_call); 3070 3071 // Construct SupportedFeatures for SDP bitmap: 3072 // 3073 // "The values of the “SupportedFeatures” bitmap given in Table 5.4 shall be the same as the values 3074 // of the Bits 0 to 4 of the unsolicited result code +BRSF" 3075 // 3076 // Wide band speech (bit 5) requires Codec negotiation 3077 // 3078 uint16_t sdp_features = supported_features & 0x1f; 3079 if ( (wide_band_speech == 1) && (supported_features & (1 << HFP_AGSF_CODEC_NEGOTIATION))){ 3080 sdp_features |= 1 << 5; 3081 } 3082 3083 if (supported_features & (1 << HFP_AGSF_ENHANCED_VOICE_RECOGNITION_STATUS)){ 3084 sdp_features |= 1 << 6; 3085 } 3086 3087 if (supported_features & (1 << HFP_AGSF_VOICE_RECOGNITION_TEXT)){ 3088 sdp_features |= 1 << 7; 3089 } 3090 3091 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); // Hands-Free Profile - SupportedFeatures 3092 de_add_number(service, DE_UINT, DE_SIZE_16, sdp_features); 3093 } 3094 3095 void hfp_ag_register_packet_handler(btstack_packet_handler_t callback){ 3096 btstack_assert(callback != NULL); 3097 3098 hfp_ag_callback = callback; 3099 hfp_set_ag_callback(callback); 3100 } 3101