pcm -> mp3

Author: zhw2590582

docs/sample.mp3

@@ -143,16 +143,7 @@ const Waveform = memo(
                 },
             });
 
-            fetch('/sample.pcm')
-                .then((res) => res.arrayBuffer())
-                .then((buffer) => {
-                    waveform.load({
-                        sampleRate: 44100,
-                        getChannelData() {
-                            return new Float32Array(buffer);
-                        },
-                    });
-                });
+            waveform.load('/sample.mp3');
         }, [player, $waveform, setWaveform, setRender]);
 
         return <div className="waveform" ref={$waveform} />;

public/sample.mp3

@@ -241,6 +241,7 @@ export default function Header({
                 const output = `${Date.now()}.mp3`;
                 await ffmpeg.run('-i', file.name, '-ac', '1', '-ar', '8000', output);
                 const uint8 = ffmpeg.FS('readFile', output);
+                // download(URL.createObjectURL(new Blob([uint8])), `${output}`);
                 await waveform.decoder.decodeAudioData(uint8);
                 // download(URL.createObjectURL(new Blob([waveform.decoder.channelData])), `${Date.now()}.pcm`);
                 waveform.drawer.update();