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d3.audio.waveforms
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| d3 audio waveforms block |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="description" content=""> | |
| <meta name="author" content="jm3"> | |
| <title>d3 audio waveforms</title> | |
| <!-- build:css stylesheets/app.min.css--> | |
| <link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Roboto:400,100|Raleway:400,200|Amatic+SC"> | |
| <link rel="stylesheet" type="text/css" href="waveform.css"> | |
| <!-- endbuild--> | |
| </head> | |
| <body> | |
| <div class="page"> | |
| <h1>d3 audio waveforms ·<a href="http://www.jm3.net/">john manoogian III</a></h1> | |
| <div class="waveform"> | |
| <h2>divs:</h2> | |
| <div></div> | |
| <h2>SVG:</h2> | |
| <div class="svg"> | |
| <!-- h2 Audio:--> | |
| </div> | |
| </div> | |
| <iframe width="100%" height="166" scrolling="no" frameborder="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/141102884&amp;color=ff5500&amp;auto_play=false&amp;hide_related=false&amp;show_artwork=true" class="soundcloud_embed"></iframe> | |
| </div> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="waveform.js"></script> | |
| <!-- endbuild--> | |
| </body> | |
| </html> | |
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| * { | |
| margin: 0; | |
| font-family: 'Amatic SC', cursive; | |
| } | |
| html { | |
| margin: 1.0em; | |
| } | |
| h1 { | |
| font-size: 48px; | |
| font-weight: bold; | |
| } | |
| h1 a, | |
| h1 a:visited { | |
| text-decoration: none; | |
| font-weight: normal; | |
| font-size: 90%; | |
| color: #000; | |
| border-bottom: 1px dashed #bbb; | |
| } | |
| h1 a:hover { | |
| color: red; | |
| } | |
| .waveform > svg, | |
| .waveform > div { | |
| border: 2px solid #ddd; | |
| height: 140px; | |
| margin-left: 40px; | |
| padding: 2px; | |
| position: relative; | |
| width: 880px; | |
| } | |
| .waveform h2 { | |
| margin-left: 40px; | |
| font-size: 36px; | |
| } | |
| .waveform > div div.bar { | |
| background-color: red; | |
| position: absolute; | |
| } | |
| .waveform .svg g rect { | |
| fill: red; | |
| opacity: 0.5; | |
| } | |
| .soundcloud_embed { | |
| display: none; | |
| opacity: 0.5; | |
| margin-left: 40px; | |
| width: 968px; | |
| /* weird padding offset; SC embed is slightly too short? */ | |
| } | |
| .axis { | |
| position: absolute; | |
| top: 4px; | |
| left: -40px; | |
| } | |
| .axis g path.domain { | |
| display: none; | |
| } | |
| .axis g text { | |
| font-family: 'Roboto', sans-serif; | |
| opacity: 0.5; | |
| font-size: 10px; | |
| } |
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| var wave_json; | |
| var wave_uri = "https://s3.amazonaws.com/stencilfiles/takejson.json"; | |
| var max_points = 1024; | |
| var width = 880, | |
| height = 140; | |
| d3.json( wave_uri, function(error, json) { | |
| wave_json = json.data.slice(1, max_points); | |
| div_render( wave_json, ".waveform > div" ); | |
| svg_render( wave_json, ".waveform > .svg" ); | |
| }); | |
| function div_render( data, div ) { | |
| var y = d3.scale.linear().range([height, -height]); | |
| var x = d3.scale.linear().domain([0, data.length]); | |
| var max_val = d3.max(data, function(d) { return d; }); | |
| y.domain([-max_val, max_val]); | |
| var bar_width = width/data.length; | |
| d3.select( div ).selectAll("div") | |
| .data(wave_json) | |
| .enter() | |
| .append("div") | |
| .attr("class", "bar") | |
| .style("width", bar_width + "px" ) | |
| .style("height", function(d,i) { | |
| return y(d) + "px"; | |
| }) | |
| .style("bottom", function(d) { | |
| // 2px slide up because 2px padding | |
| var bottom = height - Math.abs(y(d)/2) - height/2 + 2; | |
| return bottom + "px"; | |
| }) | |
| .style("left", function(d,i) { | |
| var left = x(i)*width; // could also do: i * bar_width; | |
| return left + "px"; | |
| }); | |
| var axis = d3.svg.axis() | |
| .scale(y) | |
| .ticks(12) | |
| .orient("left"); | |
| d3.select(".waveform > div").append("svg") | |
| .attr("class", "axis") | |
| .attr("width", 60) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(40," + (height/2) + ")" ) | |
| .call(axis); | |
| } | |
| function svg_render( data, svg ) { | |
| var node = d3.select(svg).append("svg") | |
| .attr("class","chart") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var y = d3.scale.linear().range([height, -height]); | |
| var max_val = d3.max(data, function(d) { return d; }); | |
| y.domain([-max_val, max_val]); | |
| var x = d3.scale.linear().domain([0, data.length]); | |
| var bar_width = width / data.length; | |
| var chart = node.attr("width", width).attr("height", height); | |
| var bar = chart.selectAll("g") | |
| .data(data) | |
| .enter().append("g") // svg "group" | |
| .attr("transform", function(d, i) { | |
| return "translate(" + i * bar_width + ",0)"; | |
| }); | |
| bar.append("rect") | |
| .attr("y", function(d) { | |
| var yv = height - Math.abs(y(d)/2) - height/2 + 2; | |
| return yv; | |
| }) | |
| .attr("height", function(d) { | |
| return Math.abs(y(d)); }) | |
| .attr("width", bar_width ); | |
| var axis = d3.svg.axis() | |
| .scale(y) | |
| .ticks(12) | |
| .orient("left"); | |
| d3.select(".svg").append("svg") | |
| .attr("class", "axis") | |
| .attr("width", 60) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(40," + (height/2) + ")" ) | |
| .call(axis); | |
| } | |
| function d( s ) { | |
| console.log( "log: " + s ); | |
| } |
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