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Introducing the Audio API extension - Archive of obsolete content
users must create an audio object and then use the
mozsetup() function to specify the number of channels and the frequency (in hz).
...audiooutput.
mozsetup(2, 44100); once this is done, the samples need to be created.
...sing a typed array var samples = new float32array([0.242, 0.127, 0.0, -0.058, -0.242, ...]); var numbersampleswritten = audiooutput.mozwriteaudio(samples); in the following example, we create an audio pulse: <!doctype html> <html> <head> <title>generating audio in real time</title> <script type="text/javascript"> function playtone() { var output = new audio(); output.
mozsetup(1, 44100); var samples = new float32array(22050); for (var i = 0; i < samples.length ; i++) { samples[i] = math.sin( i / 20 ); } output.mozwriteaudio(samples); } </script> </head> <body> <p>this demo plays a one second tone when you click the button below.</p> <button onclick="playtone();">play</button> </body> </html> the mozcurren...
... 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 ...
nsIDOMHTMLAudioElement
last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) inherits from: nsidomhtmlmediaelement method overview unsigned long long mozcurrentsampleoffset(); void
mozsetup(in pruint32 channels, in pruint32 rate); [implicit_jscontext] unsigned long mozwriteaudio(in jsval data); methods mozcurrentsampleoffset() non-standard this feature is non-standard and is not on a standards track.
...
mozsetup() non-standard this feature is non-standard and is not on a standards track.
...void
mozsetup( in pruint32 channels, in pruint32 rate ); parameters channels the number of audio channels the audio stream should use.
...exceptions thrown ns_error_dom_invalid_state_err the stream has not been initialized for writing by a call to
mozsetup().