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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| <!doctype html> | ||
| <html> | ||
| <head> | ||
| <style> | ||
| div#mp3_player{ width:500px; height:60px; background:#000; padding:5px; margin:50px auto; } | ||
| div#mp3_player > div > audio{ width:500px; background:#000; float:left; } | ||
| div#mp3_player > canvas{ width:500px; height:30px; background:#002D3C; float:left; } | ||
| </style> | ||
| <script> | ||
| // Create a new instance of an audio object and adjust some of its properties | ||
| var audio = new Audio(); | ||
| audio.src = 'track1.mp3'; | ||
| audio.controls = true; | ||
| audio.loop = true; | ||
| audio.autoplay = true; | ||
| audio.crossOrigin = "anonymous"; | ||
| // Establish all variables that your Analyser will use | ||
| var canvas, ctx, source, context, analyser, fbc_array, bars, bar_x, bar_width, bar_height; | ||
| // Initialize the MP3 player after the page loads all of its HTML into the window | ||
| window.addEventListener("load", initMp3Player, false); | ||
| function initMp3Player(){ | ||
| document.getElementById('audio_box').appendChild(audio); | ||
| context = new AudioContext(); // AudioContext object instance | ||
| analyser = context.createAnalyser(); // AnalyserNode method | ||
| canvas = document.getElementById('analyser_render'); | ||
| ctx = canvas.getContext('2d'); | ||
| // Re-route audio playback into the processing graph of the AudioContext | ||
| source = context.createMediaElementSource(audio); | ||
| source.connect(analyser); | ||
| analyser.connect(context.destination); | ||
| frameLooper(); | ||
| } | ||
| // frameLooper() animates any style of graphics you wish to the audio frequency | ||
| // Looping at the default frame rate that the browser provides(approx. 60 FPS) | ||
| function frameLooper(){ | ||
| window.requestAnimationFrame(frameLooper); | ||
| fbc_array = new Uint8Array(analyser.frequencyBinCount); | ||
| analyser.getByteFrequencyData(fbc_array); | ||
| ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear the canvas | ||
| ctx.fillStyle = '#00CCFF'; // Color of the bars | ||
| bars = 100; | ||
| for (var i = 0; i < bars; i++) { | ||
| bar_x = i * 3; | ||
| bar_width = 2; | ||
| bar_height = -(fbc_array[i] / 2); | ||
| // fillRect( x, y, width, height ) // Explanation of the parameters below | ||
| ctx.fillRect(bar_x, canvas.height, bar_width, bar_height); | ||
| } | ||
| } | ||
| </script> | ||
| </head> | ||
| <body> | ||
| <div id="mp3_player"> | ||
| <div id="audio_box"></div> | ||
| <canvas id="analyser_render"></canvas> | ||
| </div> | ||
| </body> | ||
| </html> |
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