Added possibility to flush clients audio buffer

shared/html/templates.html

@@ -2621,6 +2621,9 @@
                 </div>
                 <div class="buttons">
                     <button class="btn btn-blue button-reset">{{tr "Reset" /}}</button>
+                    {{if have_flush}}
+                    <button class="btn btn-blue button-flush">{{tr "Flush buffer" /}}</button>
+                    {{/if}}
                     <div class="spacer"></div>
                     <button class="btn btn-danger button-cancel">{{tr "Cancel" /}}</button>
                     <button class="btn btn-success button-close">{{tr "Close" /}}</button>

shared/js/connection/ConnectionBase.ts

@@ -79,6 +79,9 @@ namespace connection {
 
             reset_latency_settings();
             latency_settings(settings?: LatencySettings) : LatencySettings;
+
+            support_flush() : boolean;
+            flush();
         }
 
         export abstract class AbstractVoiceConnection {

shared/js/ui/client.ts

@@ -633,7 +633,9 @@ class ClientEntry {
                     Modals.spawnChangeLatency(this, this._audio_handle.latency_settings(), () => {
                         this._audio_handle.reset_latency_settings();
                         return this._audio_handle.latency_settings();
-                    }, settings => this._audio_handle.latency_settings(settings));
+                    }, settings => this._audio_handle.latency_settings(settings), this._audio_handle.support_flush ? () => {
+                        this._audio_handle.flush();
+                    } : undefined);
                 },
                 visible: this._audio_handle && this._audio_handle.support_latency_settings()
             }, {
@@ -1431,7 +1433,9 @@ class MusicClientEntry extends ClientEntry {
                     Modals.spawnChangeLatency(this, this._audio_handle.latency_settings(), () => {
                         this._audio_handle.reset_latency_settings();
                         return this._audio_handle.latency_settings();
-                    }, settings => this._audio_handle.latency_settings(settings));
+                    }, settings => this._audio_handle.latency_settings(settings), this._audio_handle.support_flush ? () => {
+                        this._audio_handle.flush();
+                    } : undefined);
                 },
                 visible: this._audio_handle && this._audio_handle.support_latency_settings()
             },

shared/js/ui/modal/ModalChangeLatency.ts

@@ -4,7 +4,7 @@
 
 namespace Modals {
     let modal: Modal;
-    export function spawnChangeLatency(client: ClientEntry, current: connection.voice.LatencySettings, reset: () => connection.voice.LatencySettings, apply: (settings: connection.voice.LatencySettings) => any) {
+    export function spawnChangeLatency(client: ClientEntry, current: connection.voice.LatencySettings, reset: () => connection.voice.LatencySettings, apply: (settings: connection.voice.LatencySettings) => any, callback_flush?: () => any) {
         if(modal) modal.close();
 
         const begin = Object.assign({}, current);
@@ -19,7 +19,9 @@ namespace Modals {
                         client_name: client.clientNickName(),
                         client_unique_id: client.properties.client_unique_identifier,
                         client_id: client.clientId()
-                    })
+                    }),
+
+                    have_flush: (typeof(callback_flush) === "function")
                 });
 
                 const update_value = () => {
@@ -96,6 +98,8 @@ namespace Modals {
                     slider_min.value(current.min_buffer);
                 });
 
+                tag.find(".button-flush").on('click', event => callback_flush());
+
                 return tag.children();
             },
             footer: null,

web/js/voice/VoiceClient.ts

@@ -223,6 +223,14 @@ namespace audio {
             support_latency_settings(): boolean {
                 return false;
             }
+
+            support_flush(): boolean {
+                return false;
+            }
+
+            flush() {
+                throw "not supported";
+            }
         }
     }
 }