hfp: emit call answered and terminated events

example/hfp_ag_demo.c

@@ -160,7 +160,7 @@ static void show_usage(void){
     printf("c - simulate incoming call from 1234567 | C - simulate call from 1234567 dropped\n");
     printf("d - report AG failure\n");
     printf("D - delete all link keys\n");
-    printf("e - answer call on AG                   | E - reject call on AG\n");
+    printf("e - answer call on AG                   | E - terminate call on AG\n");
     printf("r - disable in-band ring tone           | R - enable in-band ring tone\n");
     printf("f - Disable cellular network            | F - Enable cellular network\n");
     printf("g - Set signal strength to 0            | G - Set signal strength to 5\n");
@@ -247,7 +247,7 @@ static void stdin_process(char cmd){
             break;
         case 'E':
             log_info("USER:\'%c\'", cmd);
-            printf("Reject call on AG\n");
+            printf("Terminate call on AG\n");
             hfp_ag_terminate_call();
             break;
         case 'f':
@@ -559,9 +559,15 @@ static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * even
                         hci_request_sco_can_send_now_event();
                     }
                     break;
+          
+                case HFP_SUBEVENT_CALL_ANSWERED:
+                    printf("Call answered\n");
+                    break;
+          
                 case HFP_SUBEVENT_CALL_TERMINATED:
                     printf("Call terminated\n");
                     break;
+          
                 case HFP_SUBEVENT_AUDIO_CONNECTION_RELEASED:
                     printf("Audio connection released\n");
                     sco_handle = HCI_CON_HANDLE_INVALID;
@@ -595,14 +601,12 @@ static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * even
                     printf("Attach number to voice tag. Sending '1234567\n");
                     hfp_ag_send_phone_number_for_voice_tag(acl_handle, "1234567");
                     break;
+               
                 case HFP_SUBEVENT_TRANSMIT_DTMF_CODES:
                     printf("Send DTMF Codes: '%s'\n", hfp_subevent_transmit_dtmf_codes_get_dtmf(event));
                     hfp_ag_send_dtmf_code_done(acl_handle);
                     break;
-                case HFP_SUBEVENT_CALL_ANSWERED:
+               
-                    printf("Call answered by HF\n");
-                    break;
-                
                 case HFP_SUBEVENT_VOICE_RECOGNITION_STATUS:
                     status = hfp_subevent_voice_recognition_status_get_status(event);
                     if (status != ERROR_CODE_SUCCESS){

example/hfp_hf_demo.c

@@ -528,6 +528,11 @@ static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * even
                                 hci_request_sco_can_send_now_event();
                             }
                             break;
+
+                        case HFP_SUBEVENT_CALL_ANSWERED:
+                            printf("Call answered\n");
+                            break;
+
                         case HFP_SUBEVENT_CALL_TERMINATED:
                             printf("Call terminated\n");
                             break;

src/classic/hfp_ag.c

@@ -1634,7 +1634,6 @@ static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_con
                 default:
                     break;
             }
-            hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED);
             break;
 
         case HFP_AG_TERMINATE_CALL_BY_AG:
@@ -1823,6 +1822,7 @@ static void hfp_ag_call_sm(hfp_ag_call_event_t event, hfp_connection_t * hfp_con
                 hfp_ag_transfer_callheld_state();
             }
             hfp_ag_hf_stop_ringing(hfp_connection);
+            hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED);
             break;
         }
 

src/classic/hfp_ag.h

@@ -416,7 +416,7 @@ void hfp_ag_outgoing_call_ringing(void);
 void hfp_ag_outgoing_call_established(void);
 
 /**
- * @brief Pass the call droped event to the AG.
+ * @brief Pass the call dropped event to the AG.
  */
 void hfp_ag_call_dropped(void);
 

src/classic/hfp_hf.c

@@ -1189,7 +1189,15 @@ static void hfp_hf_handle_transfer_ag_indicator_status(hfp_connection_t * hfp_co
                 // avoid set but not used warning
                 (void) hfp_hf_callheld_status;
             } else if (strcmp(hfp_connection->ag_indicators[i].name, "call") == 0){
-                hfp_hf_call_status = (hfp_call_status_t) hfp_connection->ag_indicators[i].status;
+                hfp_call_status_t new_hf_call_status = (hfp_call_status_t) hfp_connection->ag_indicators[i].status;
+                if (hfp_hf_call_status != new_hf_call_status){
+                    if (new_hf_call_status == HFP_CALL_STATUS_NO_HELD_OR_ACTIVE_CALLS){
+                        hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_TERMINATED);
+                    } else {
+                        hfp_emit_simple_event(hfp_connection, HFP_SUBEVENT_CALL_ANSWERED);
+                    }
+                }
+                hfp_hf_call_status = new_hf_call_status; 
             }
             hfp_connection->ag_indicators[i].status_changed = 0;
             hfp_emit_ag_indicator_event(hfp_connection, &hfp_connection->ag_indicators[i]);