-
-
Save tiborsaas/2377315 to your computer and use it in GitHub Desktop.
$.wave64 Example with invert waveform
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <title>SoundCloud $.wave64 Example</title> | |
| <style> | |
| body{ | |
| background: #333; | |
| } | |
| canvas{ | |
| display: block; | |
| margin: auto; | |
| } | |
| </style> | |
| <!-- Include jQuery, SoundCloud JS SDK, and the $.wave64 Plugin --> | |
| <script src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js'></script> | |
| <script src='http://connect.soundcloud.com/sdk.js'></script> | |
| <script src='http://wave64.it/jquery.wave64.js'></script> | |
| <script type='text/javascript'> | |
| $(document).ready(function() { | |
| // Get the canvas & its context, width, and height, waveform color, gradient level | |
| var canvas = $("#waveform")[0]; | |
| context = canvas.getContext("2d"); | |
| width = context.canvas.clientWidth, | |
| height = context.canvas.clientHeight, | |
| targetColor = [255, 102, 0], | |
| gi = 0, // Gradient index | |
| gradLevel = 0.5; // Level of gradient effent. 0 = no gradient | |
| // Make sure the canvas is sized to the appropriate size. | |
| canvas.setAttribute("width", width); | |
| canvas.setAttribute("height", height); | |
| // Initialize the SoundCloud Javascript SDK | |
| SC.initialize({ | |
| client_id: "YOUR_CLIENT_ID" | |
| }); | |
| // SC.get a track from SoundCloud. | |
| SC.get("/tracks/33820987", function(track) { | |
| // Pass the waveform url, height, width, RGB array, and callback to $wave64. | |
| $.wave64(track.waveform_url, height, width, targetColor, function(waveformData) { | |
| // Iterate through the canvas pixel array, and invert the transparency | |
| for(var i=0; i<waveformData.data.length; i+=4) { | |
| if(i%width == 0) { | |
| gi++; | |
| } | |
| waveformData.data[i] = targetColor[0]; | |
| waveformData.data[i+1] = targetColor[1]; | |
| waveformData.data[i+2] = targetColor[2]; | |
| waveformData.data[i+3] = 255 - waveformData.data[i+3] - gi*gradLevel; | |
| } | |
| context.putImageData(waveformData, 0, 0); | |
| }); | |
| }); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <canvas id='waveform' style='width:600px;height:100px'></canvas> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment