Implement pausing

toxav/av_test.c

@@ -16,13 +16,25 @@
 
 typedef struct {
     bool incoming;
-    bool ringing;
+    TOXAV_CALL_STATE state;
-    bool ended;
-    bool errored;
-    bool sending;
-    bool paused;
 } CallControl;
 
+const char* stringify_state(TOXAV_CALL_STATE s)
+{
+    static const char* strings[] =
+    {
+        "NOT SENDING",
+        "SENDING AUDIO",
+        "SENDING VIDEO",
+        "SENDING AUDIO AND VIDEO",
+        "PAUSED",
+        "END",
+        "ERROR"
+    };
+    
+    return strings [s];
+};
+
 
 /** 
  * Callbacks 
@@ -34,53 +46,9 @@ void t_toxav_call_cb(ToxAV *av, uint32_t friend_number, bool audio_enabled, bool
 }
 void t_toxav_call_state_cb(ToxAV *av, uint32_t friend_number, TOXAV_CALL_STATE state, void *user_data)
 {
-    printf("Handling CALL STATE callback: ");
+    printf("Handling CALL STATE callback: %s\n", stringify_state(state));
     
-    if (((CallControl*)user_data)->paused)
+    ((CallControl*)user_data)->state = state;
-        ((CallControl*)user_data)->paused = false;
-    
-    switch (state)
-    {            
-        case TOXAV_CALL_STATE_NOT_SENDING: {
-            printf("Not sending");
-            ((CallControl*)user_data)->sending = false;
-        } break;
-        
-        case TOXAV_CALL_STATE_SENDING_A: {
-            printf("Sending Audio");
-            ((CallControl*)user_data)->sending = true;
-        } break;
-        
-        case TOXAV_CALL_STATE_SENDING_V: {
-            printf("Sending Video");
-            ((CallControl*)user_data)->sending = true;
-        } break;
-        
-        case TOXAV_CALL_STATE_SENDING_AV: {
-            printf("Sending Both");
-            ((CallControl*)user_data)->sending = true;
-        } break;
-        
-        case TOXAV_CALL_STATE_PAUSED: {
-            printf("Paused");
-            ((CallControl*)user_data)->paused = true;
-            ((CallControl*)user_data)->sending = false;
-        } break;
-        
-        case TOXAV_CALL_STATE_END: {
-            printf("Ended");
-            ((CallControl*)user_data)->ended = true;
-            ((CallControl*)user_data)->sending = false;
-        } break;
-        
-        case TOXAV_CALL_STATE_ERROR: {
-            printf("Error");
-            ((CallControl*)user_data)->errored = true;
-            ((CallControl*)user_data)->sending = false;
-        } break;
-    }
-    
-    printf("\n");
 }
 void t_toxav_receive_video_frame_cb(ToxAV *av, uint32_t friend_number,
                                     uint16_t width, uint16_t height,
@@ -211,27 +179,24 @@ int main (int argc, char** argv)
         long long unsigned int start_time = time(NULL); \
         \
         \
-        while (!AliceCC.ended || !BobCC.ended) { \
+        while (BobCC.state != TOXAV_CALL_STATE_END) { \
             \
             if (BobCC.incoming) { \
                 TOXAV_ERR_ANSWER rc; \
-                toxav_answer(BobAV, 0, 48, 4000, &rc); \
+                toxav_answer(BobAV, 0, A_BR, V_BR, &rc); \
                 \
                 if (rc != TOXAV_ERR_ANSWER_OK) { \
                     printf("toxav_answer failed: %d\n", rc); \
                     exit(1); \
                 } \
                 BobCC.incoming = false; \
-                BobCC.sending = true; /* There is no more start callback when answering */\
+            } else { \
-            } \
-            else if (AliceCC.sending && BobCC.sending) { \
                 /* TODO rtp */ \
                 \
                 if (time(NULL) - start_time == 5) { \
                     \
                     TOXAV_ERR_CALL_CONTROL rc; \
                     toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_CANCEL, &rc); \
-                    AliceCC.ended = true; /* There is no more end callback when hanging up */\
                     \
                     if (rc != TOXAV_ERR_CALL_CONTROL_OK) { \
                         printf("toxav_call_control failed: %d\n", rc); \
@@ -286,7 +251,7 @@ int main (int argc, char** argv)
             }
         }
         
-        while (!AliceCC.ended)
+        while (AliceCC.state != TOXAV_CALL_STATE_END)
             iterate(Bsn, AliceAV, BobAV);
         
         printf("Success!\n");
@@ -323,12 +288,102 @@ int main (int argc, char** argv)
         }
         
         /* Alice will not receive end state */
-        while (!BobCC.ended)
+        while (BobCC.state != TOXAV_CALL_STATE_END)
             iterate(Bsn, AliceAV, BobAV);
         
         printf("Success!\n");
     }
     
+    { /* Check Mute-Unmute etc */
+        printf("\nTrying mute functionality...\n");
+        
+        
+        memset(&AliceCC, 0, sizeof(CallControl));
+        memset(&BobCC, 0, sizeof(CallControl));
+        
+        /* Assume sending audio and video */
+        {
+            TOXAV_ERR_CALL rc;
+            toxav_call(AliceAV, 0, 48, 1000, &rc);
+            
+            if (rc != TOXAV_ERR_CALL_OK) {
+                printf("toxav_call failed: %d\n", rc);
+                exit(1);
+            }
+        }
+        
+        while (!BobCC.incoming)
+            iterate(Bsn, AliceAV, BobAV);
+        
+        /* At first try all stuff while in invalid state */
+        assert(!toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_PAUSE, NULL));
+        assert(!toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_RESUME, NULL));
+        assert(!toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_MUTE_AUDIO, NULL));
+        assert(!toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_MUTE_VIDEO, NULL));
+        assert(!toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_UNMUTE_AUDIO, NULL));
+        assert(!toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_UNMUTE_VIDEO, NULL));
+        
+        {
+            TOXAV_ERR_ANSWER rc;
+            toxav_answer(BobAV, 0, 48, 4000, &rc);
+            
+            if (rc != TOXAV_ERR_ANSWER_OK) {
+                printf("toxav_answer failed: %d\n", rc);
+                exit(1);
+            }
+        }
+        
+        iterate(Bsn, AliceAV, BobAV);
+        
+        /* Pause and Resume */
+        printf("Pause and Resume\n");
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_PAUSE, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_PAUSED);
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_RESUME, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_SENDING_AV);
+        
+        /* Mute/Unmute single */
+        printf("Mute/Unmute single\n");
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_MUTE_AUDIO, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_CONTROL_MUTE_AUDIO);
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_UNMUTE_AUDIO, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_CONTROL_UNMUTE_AUDIO);
+        
+        /* Mute/Unmute both */
+        printf("Mute/Unmute both\n");
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_MUTE_AUDIO, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_SENDING_V);
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_MUTE_VIDEO, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_NOT_SENDING);
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_UNMUTE_AUDIO, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_SENDING_A);
+        assert(toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_UNMUTE_VIDEO, NULL));
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_SENDING_AV);
+        
+        {
+            TOXAV_ERR_CALL_CONTROL rc;
+            toxav_call_control(AliceAV, 0, TOXAV_CALL_CONTROL_CANCEL, &rc);
+        
+            if (rc != TOXAV_ERR_CALL_CONTROL_OK) {
+                printf("toxav_call_control failed: %d\n", rc);
+                exit(1);
+            }
+        }
+        
+        iterate(Bsn, AliceAV, BobAV);
+        assert(BobCC.state == TOXAV_CALL_STATE_END);
+        
+        printf("Success!\n");
+    }
+    
     printf("\nTest successful!\n");
     return 0;
 }

toxav/msi.h

@@ -41,8 +41,8 @@ typedef enum {
     msi_InvalidState,
     msi_StrayMessage,
     msi_SystemError,
-    msi_ErrUndisclosed,
     msi_HandleError,
+    msi_ErrUndisclosed, /* NOTE: must be last enum otherwise parsing wont work */
 } MSIError;
 
 /**

toxav/toxav.c

@@ -235,6 +235,8 @@ bool toxav_call(ToxAV* av, uint32_t friend_number, uint32_t audio_bit_rate, uint
         return false;
     }
     
+    call->msi_call->av_call = call;
+    
     return true;
 }
 
@@ -310,12 +312,22 @@ bool toxav_call_control(ToxAV* av, uint32_t friend_number, TOXAV_CALL_CONTROL co
     switch (control)
     {
         case TOXAV_CALL_CONTROL_RESUME: {
+            if (!call->active) {
+                rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                goto END;
+            }
+            
+            /* Only act if paused and had media transfer active before */
             if (call->msi_call->self_capabilities == 0 && 
                 call->last_capabilities ) {
-                /* Only act if paused and had media transfer active before */
                 
-                if (msi_change_capabilities(call->msi_call, call->last_capabilities) == -1)
+                if (msi_change_capabilities(call->msi_call, 
-                    return false;
+                    call->last_capabilities) == -1) {
+                    /* The only reason for this function to fail is invalid state 
+                     * ( not active ) */
+                    rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                    goto END;
+                }
                 
                 rtp_start_receiving(call->rtps[audio_index]);
                 rtp_start_receiving(call->rtps[video_index]);
@@ -323,13 +335,21 @@ bool toxav_call_control(ToxAV* av, uint32_t friend_number, TOXAV_CALL_CONTROL co
         } break;
         
         case TOXAV_CALL_CONTROL_PAUSE: {
-            if (call->msi_call->self_capabilities) {
+            if (!call->active) {
-                /* Only act if not already paused */
+                rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                goto END;
+            }
             
+            /* Only act if not already paused */
+            if (call->msi_call->self_capabilities) {
                 call->last_capabilities = call->msi_call->self_capabilities;
                 
-                if (msi_change_capabilities(call->msi_call, 0) == -1 )
+                if (msi_change_capabilities(call->msi_call, 0) == -1 ) {
-                    return false;
+                    /* The only reason for this function to fail is invalid state 
+                     * ( not active ) */
+                    rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                    goto END;
+                }
                 
                 rtp_stop_receiving(call->rtps[audio_index]);
                 rtp_stop_receiving(call->rtps[video_index]);
@@ -341,26 +361,84 @@ bool toxav_call_control(ToxAV* av, uint32_t friend_number, TOXAV_CALL_CONTROL co
             msi_hangup(call->msi_call);
             
             /* No mather the case, terminate the call */
+            call_kill_transmission(call);
             call_remove(call);
         } break;
         
         case TOXAV_CALL_CONTROL_MUTE_AUDIO: {
-            if (call->msi_call->self_capabilities & msi_CapRAudio || 
+            if (!call->active) {
-                call->msi_call->self_capabilities & msi_CapSAudio) {
+                rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                goto END;
+            }
             
-                uint8_t capabilities = call->msi_call->self_capabilities;
+            if (call->msi_call->self_capabilities & msi_CapRAudio) {
-                capabilities ^= msi_CapRAudio;
+                if (msi_change_capabilities(call->msi_call, call->
-                capabilities ^= msi_CapRAudio;
+                    msi_call->self_capabilities ^ msi_CapRAudio) == -1) {
-                
+                    /* The only reason for this function to fail is invalid state 
-                if (msi_change_capabilities(call->msi_call, call->msi_call->self_capabilities) == -1)
+                     * ( not active ) */
-                    return false;
+                    rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                    goto END;
+                }
                 
                 rtp_stop_receiving(call->rtps[audio_index]);
             }
         } break;
         
         case TOXAV_CALL_CONTROL_MUTE_VIDEO: {
+            if (!call->active) {
+                rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                goto END;
+            }
             
+            if (call->msi_call->self_capabilities & msi_CapRVideo) {
+                if (msi_change_capabilities(call->msi_call, call->
+                    msi_call->self_capabilities ^ msi_CapRVideo) == -1) {
+                    /* The only reason for this function to fail is invalid state 
+                     * ( not active ) */
+                    rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                    goto END;
+                }
+                
+                rtp_stop_receiving(call->rtps[video_index]);
+            }
+        } break;
+        
+        case TOXAV_CALL_CONTROL_UNMUTE_AUDIO: {
+            if (!call->active) {
+                rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                goto END;
+            }
+            
+            if (call->msi_call->self_capabilities & ~msi_CapRAudio) {                
+                if (msi_change_capabilities(call->msi_call, call->
+                    msi_call->self_capabilities | msi_CapRAudio) == -1) {
+                    /* The only reason for this function to fail is invalid state 
+                     * ( not active ) */
+                    rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                    goto END;
+                }
+                
+                rtp_start_receiving(call->rtps[audio_index]);
+            }
+        } break;
+        
+        case TOXAV_CALL_CONTROL_UNMUTE_VIDEO: {
+            if (!call->active) {
+                rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                goto END;
+            }
+            
+            if (call->msi_call->self_capabilities & ~msi_CapRVideo) {
+                if (msi_change_capabilities(call->msi_call, call->
+                    msi_call->self_capabilities | msi_CapRVideo) == -1) {
+                    /* The only reason for this function to fail is invalid state 
+                     * ( not active ) */
+                    rc = TOXAV_ERR_CALL_CONTROL_FRIEND_NOT_IN_CALL;
+                    goto END;
+                }
+                
+                rtp_start_receiving(call->rtps[video_index]);
+            }
         } break;
     }
     
@@ -558,8 +636,6 @@ void toxav_callback_receive_audio_frame(ToxAV* av, toxav_receive_audio_frame_cb*
  * :: Internal
  *
  ******************************************************************************/
-/** TODO:
- */
 int callback_invite(void* toxav_inst, MSICall* call)
 {
     ToxAV* toxav = toxav_inst;
@@ -586,15 +662,20 @@ int callback_start(void* toxav_inst, MSICall* call)
     
     ToxAVCall* av_call = call_get(toxav, call->friend_id);
     
-    if (av_call == NULL || !call_prepare_transmission(av_call)) {
+    if (av_call == NULL) {
+        /* Should this ever happen? */
+        return -1;
+    }
+    
+    if (!call_prepare_transmission(av_call)) {
+        callback_error(toxav_inst, call);
         call_remove(av_call);
         return -1;
     }
     
-    TOXAV_CALL_STATE state = capabilities_to_state(av_call->msi_call->peer_capabilities);
-    
     if (toxav->scb.first)
-        toxav->scb.first(toxav, call->friend_id, state, toxav->scb.second);
+        toxav->scb.first(toxav, call->friend_id, 
+                         capabilities_to_state(call->peer_capabilities), toxav->scb.second);
     
     return 0;
 }
@@ -603,18 +684,19 @@ int callback_end(void* toxav_inst, MSICall* call)
 {
     ToxAV* toxav = toxav_inst;
     
-    call_kill_transmission(call->av_call);
-    call_remove(call->av_call);
-    
     if (toxav->scb.first)
         toxav->scb.first(toxav, call->friend_id, TOXAV_CALL_STATE_END, toxav->scb.second);
     
+    call_kill_transmission(call->av_call);
+    call_remove(call->av_call);
+    
     return 0;
 }
 
 int callback_error(void* toxav_inst, MSICall* call)
 {
     ToxAV* toxav = toxav_inst;
+    
     if (toxav->scb.first)
         toxav->scb.first(toxav, call->friend_id, TOXAV_CALL_STATE_ERROR, toxav->scb.second);
     
@@ -633,14 +715,16 @@ int callback_capabilites(void* toxav_inst, MSICall* call)
 
 TOXAV_CALL_STATE capabilities_to_state(uint8_t capabilities)
 {
-    if ((capabilities & msi_CapSAudio) && (capabilities & msi_CapSVideo))
+    if (capabilities == 0)
+        return TOXAV_CALL_STATE_PAUSED;
+    else if ((capabilities & msi_CapSAudio) && (capabilities & msi_CapSVideo))
         return TOXAV_CALL_STATE_SENDING_AV;
     else if (capabilities & msi_CapSAudio)
         return TOXAV_CALL_STATE_SENDING_A;
     else if (capabilities & msi_CapSVideo)
         return TOXAV_CALL_STATE_SENDING_V;
-    else
+    
-        return TOXAV_CALL_STATE_PAUSED;
+    return TOXAV_CALL_STATE_NOT_SENDING;
 }
 
 bool audio_bitrate_invalid(uint32_t bitrate)
@@ -798,8 +882,6 @@ bool call_prepare_transmission(ToxAVCall* call)
         goto MUTEX_INIT_ERROR;
     }
     
-    uint8_t capabilities = call->msi_call->self_capabilities;
-    
     call->cs = cs_new(call->msi_call->peer_vfpsz);
     
     if ( !call->cs ) {
@@ -813,8 +895,7 @@ bool call_prepare_transmission(ToxAVCall* call)
     memcpy(&call->cs->acb, &av->acb, sizeof(av->acb));
     memcpy(&call->cs->vcb, &av->vcb, sizeof(av->vcb));
     
-    if (capabilities & msi_CapSAudio || capabilities & msi_CapRAudio) { /* Prepare audio sending */
+    { /* Prepare audio */
-        
         call->rtps[audio_index] = rtp_new(rtp_TypeAudio, av->m, call->friend_id);
         
         if ( !call->rtps[audio_index] ) {
@@ -824,12 +905,12 @@ bool call_prepare_transmission(ToxAVCall* call)
         
         call->rtps[audio_index]->cs = call->cs;
         
-        if (cs_enable_audio_sending(call->cs, call->s_audio_b, 2) != 0) {
+        /* Only enable sending if bitrate is defined */
+        if (call->s_audio_b > 0 && cs_enable_audio_sending(call->cs, call->s_audio_b, 2) != 0) {
             LOGGER_WARNING("Failed to enable audio sending!");
             goto FAILURE;
         }
         
-        if (capabilities & msi_CapRAudio) {
         if (cs_enable_audio_receiving(call->cs) != 0) {
             LOGGER_WARNING("Failed to enable audio receiving!");
             goto FAILURE;
@@ -837,9 +918,8 @@ bool call_prepare_transmission(ToxAVCall* call)
         
         rtp_start_receiving(call->rtps[audio_index]);
     }
-    }
     
-    if (capabilities & msi_CapSVideo || capabilities & msi_CapRVideo) { /* Prepare video rtp */
+    { /* Prepare video */
         call->rtps[video_index] = rtp_new(rtp_TypeVideo, av->m, call->friend_id);
         
         if ( !call->rtps[video_index] ) {
@@ -849,12 +929,13 @@ bool call_prepare_transmission(ToxAVCall* call)
         
         call->rtps[video_index]->cs = call->cs;
         
-        if (cs_enable_video_sending(call->cs, call->s_video_b) != 0) {
+        /* Only enable sending if bitrate is defined */
+        if (call->s_video_b > 0 && cs_enable_video_sending(call->cs, call->s_video_b) != 0) {
             LOGGER_WARNING("Failed to enable video sending!");
             goto FAILURE;
         }
         
-        if (capabilities & msi_CapRVideo) {
+        
         if (cs_enable_video_receiving(call->cs) != 0) {
             LOGGER_WARNING("Failed to enable video receiving!");
             goto FAILURE;
@@ -862,13 +943,12 @@ bool call_prepare_transmission(ToxAVCall* call)
         
         rtp_start_receiving(call->rtps[audio_index]);
     }
-    }
     
     call->active = 1;
     pthread_mutex_unlock(call->mutex_control);
     return true;
     
-    FAILURE:
+FAILURE:
     rtp_kill(call->rtps[audio_index]);
     call->rtps[audio_index] = NULL;
     rtp_kill(call->rtps[video_index]);
@@ -883,7 +963,7 @@ bool call_prepare_transmission(ToxAVCall* call)
     pthread_mutex_unlock(call->mutex_control);
     return false;
     
-    MUTEX_INIT_ERROR:
+MUTEX_INIT_ERROR:
     pthread_mutex_unlock(call->mutex_control);
     LOGGER_ERROR("Mutex initialization failed!\n");
     return false;

toxav/toxav.h

@@ -246,7 +246,7 @@ void toxav_callback_call_state(ToxAV *av, toxav_call_state_cb *function, void *u
 typedef enum TOXAV_CALL_CONTROL {
     /**
      * Resume a previously paused call. Only valid if the pause was caused by this
-     * client. Not valid before the call is accepted.
+     * client, if not, this control is ignored. Not valid before the call is accepted.
      */
     TOXAV_CALL_CONTROL_RESUME,
     /**
@@ -269,7 +269,19 @@ typedef enum TOXAV_CALL_CONTROL {
      * compliance, this will cause the `receive_video_frame` event to stop being
      * triggered on receiving an video frame from the friend.
      */
-    TOXAV_CALL_CONTROL_MUTE_VIDEO
+    TOXAV_CALL_CONTROL_MUTE_VIDEO,
+    /**
+     * Notify the friend that we are AGAIN ready to handle incoming audio.
+     * This control will not work if the call is not started with audio
+     * initiated.
+     */
+    TOXAV_CALL_CONTROL_UNMUTE_AUDIO,
+    /**
+     * Notify the friend that we are AGAIN ready to handle incoming video.
+     * This control will not work if the call is not started with video
+     * initiated.
+     */
+    TOXAV_CALL_CONTROL_UNMUTE_VIDEO
 } TOXAV_CALL_CONTROL;
 typedef enum TOXAV_ERR_CALL_CONTROL {
     TOXAV_ERR_CALL_CONTROL_OK,
@@ -296,7 +308,11 @@ typedef enum TOXAV_ERR_CALL_CONTROL {
      * other party paused the call. The call will resume after both parties sent
      * the RESUME control.
      */
-    TOXAV_ERR_CALL_CONTROL_ALREADY_PAUSED
+    TOXAV_ERR_CALL_CONTROL_ALREADY_PAUSED,
+    /**
+     * Tried to unmute a call that was not already muted.
+     */
+    TOXAV_ERR_CALL_CONTROL_NOT_MUTED
 } TOXAV_ERR_CALL_CONTROL;
 /**
  * Sends a call control command to a friend.