implementation

frontend/shared/StaticAudio.svelte

@@ -0,0 +1,124 @@
+<script lang="ts">
+	import { Empty } from "@gradio/atoms";
+	import {
+		BlockLabel,
+	} from "@gradio/atoms";
+	import { Music } from "@gradio/icons";
+	import type { I18nFormatter } from "@gradio/utils";
+	import { createEventDispatcher } from "svelte";
+    import { onMount } from "svelte";
+
+    import { start, stop } from "./webrtc_utils";
+
+
+    export let value: string | null = null;
+    export let label: string | undefined = undefined;
+    export let show_label = true;
+    export let rtc_configuration: Object | null = null;
+    export let i18n: I18nFormatter;
+    export let autoplay: boolean = true;
+    
+    export let server: {
+        offer: (body: any) => Promise<any>;
+    };
+
+    let stream_state = "closed";
+    let audio_player: HTMLAudioElement;
+    let pc: RTCPeerConnection;
+    let _webrtc_id = Math.random().toString(36).substring(2);
+
+
+    const dispatch = createEventDispatcher<{
+        tick: undefined;
+        error: string
+        play: undefined;
+        stop: undefined;
+	}>();
+
+
+    onMount(() => {
+        window.setInterval(() => {
+            if (stream_state == "open") {
+                dispatch("tick");
+            }
+        }, 1000);
+        }
+    )
+
+    $: if( value === "start_webrtc_stream") {
+        stream_state = "connecting";
+		value = _webrtc_id;
+		const fallback_config = {
+                iceServers: [
+                    {
+                        urls: 'stun:stun.l.google.com:19302'
+                    }
+                ]
+            };
+            pc = new RTCPeerConnection(rtc_configuration);
+            console.log("config", pc.getConfiguration());
+            pc.addEventListener("connectionstatechange",
+                async (event) => {
+                   switch(pc.connectionState) {
+                        case "connected":
+                            console.log("connected");
+							stream_state = "open";
+                            break;
+                        case "disconnected":
+                            console.log("closed");
+							stop(pc);
+                            break;
+                        default:
+                            break;
+                   }
+                }
+            )
+		start(null, pc, audio_player, server.offer, _webrtc_id, "audio").then((connection) => {
+				pc = connection;
+			}).catch(() => {
+                console.log("catching")
+                dispatch("error", "Too many concurrent users. Come back later!");
+            });
+	}
+
+
+    
+</script>
+
+<BlockLabel
+	{show_label}
+	Icon={Music}
+	float={false}
+	label={label || i18n("audio.audio")}
+/>
+    
+<audio
+    class="standard-player"
+    class:hidden={value === "__webrtc_value__"}
+    controls
+    on:load
+    bind:this={audio_player}
+    on:ended={() => dispatch("stop")}
+    on:play={() => dispatch("play")}
+/>
+{#if value === "__webrtc_value__"}
+	<Empty size="small">
+		<Music />
+	</Empty>
+{/if}
+
+
+<style>
+    :global(::part(wrapper)) {
+        margin-bottom: var(--size-2);
+    }
+
+    .standard-player {
+        width: 100%;
+        padding: var(--size-2);
+    }
+
+    .hidden {
+        display: none;
+    }
+</style>