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5 results for "mozChannels":
Introducing the Audio API extension - Archive of obsolete content
this event has the following attributes:
mozchannels: number of channels mozsamplerate: sample rate per second mozframebufferlength: number of samples collected in all channels this information is needed later to decode the audio data stream.
... the following example extracts the data from an audio element: <!doctype html> <html> <head> <title>javascript metadata example</title> </head> <body> <audio id="audio-element" src="song.ogg" controls="true" style="width: 512px;"> </audio> <script> function loadedmetadata() { channels = audio.
mozchannels; rate = audio.mozsamplerate; framebufferlength = audio.mozframebufferlength; } var audio = document.getelementbyid('audio-element'); audio.addeventlistener('loadedmetadata', loadedmetadata, false); </script> </body> </html> the mozaudioavailable event as the audio is played, sample data is made available to the audio layer and the audio buffer (size defined in mozf...
...imestamp and the first two samples in a <div> element: <!doctype html> <html> <head> <title>javascript visualization example</title> </head> <body> <audio id="audio-element" src="revolve.ogg" controls="true" style="width: 512px;"> </audio> <pre id="raw">hello</pre> <script> function loadedmetadata() { channels = audio.
mozchannels; rate = audio.mozsamplerate; framebufferlength = audio.mozframebufferlength; } function audioavailable(event) { var framebuffer = event.framebuffer; var t = event.time; var text = "samples at: " + t + "\n"; text += framebuffer[0] + " " + framebuffer[1]; raw.innerhtml = text; } var raw = document.
... a2.mozsetup(a1.
mozchannels, a1.mozsamplerate); } function audioavailable(event) { // write the current framebuffer var framebuffer = event.framebuffer; writeaudio(framebuffer); } a1.addeventlistener('mozaudioavailable', audioavailable, false); a1.addeventlistener('loadedmetadata', loadedmetadata, false); function writeaudio(audio) { buffers.push(audio); // if there's buffered data, write that while(buffers.
Visualizing an audio spectrum - Archive of obsolete content
gg" controls="true" style="width: 512px;"> </audio> <div><canvas id="fft" width="512" height="200"></canvas></div> <script> var canvas = document.getelementbyid('fft'), ctx = canvas.getcontext('2d'), channels, rate, framebufferlength, fft; function loadedmetadata() { channels = audio.
mozchannels; rate = audio.mozsamplerate; framebufferlength = audio.mozframebufferlength; fft = new fft(framebufferlength / channels, rate); } function audioavailable(event) { var fb = event.framebuffer, t = event.time, /* unused, but it's there */ signal = new float32array(fb.length / channels), magnitude; ...
Displaying a graphic with audio samples - Archive of obsolete content
</audio> <div><canvas id="fft" width="512" height="200"></canvas></div> <img id="mozlogo" style="display:none" src="mozilla2.png"></img> <script> var canvas = document.getelementbyid('fft'), ctx = canvas.getcontext('2d'), channels, rate, framebufferlength, fft; function loadedmetadata() { channels = audio.
mozchannels; rate = audio.mozsamplerate; framebufferlength = audio.mozframebufferlength; fft = new fft(framebufferlength / channels, rate); } function audioavailable(event) { var fb = event.framebuffer, t = event.time, /* unused, but it's there */ signal = new float32array(fb.length / channels), magnitude;...
HTMLMediaElement: loadedmetadata event - Web APIs
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onloadedmetadata specification html5 media additional properties property type description
mozchannels read only int the number of channels.
HTMLMediaElement - Web APIs
htmlmediaelement.
mozchannels read only returns a double representing the number of channels in the audio resource (e.g., 2 for stereo).