1 /* 2 * Copyright (C) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 module audio { 26 interface [ 27 Conditional=WEB_AUDIO, 28 GenerateToJS 29 ] RealtimeAnalyserNode : AudioNode { 30 attribute unsigned long fftSize; 31 readonly attribute unsigned long frequencyBinCount; 32 33 // minDecibels / maxDecibels represent the range to scale the FFT analysis data for conversion to unsigned byte values. 34 attribute float minDecibels; 35 attribute float maxDecibels; 36 37 // A value from 0.0 -> 1.0 where 0.0 represents no time averaging with the last analysis frame. 38 attribute float smoothingTimeConstant; 39 40 // Copies the current frequency data into the passed array. 41 // If the array has fewer elements than the frequencyBinCount, the excess elements will be dropped. 42 [Conditional=WEBGL] void getFloatFrequencyData(in Float32Array array); 43 [Conditional=WEBGL] void getByteFrequencyData(in Uint8Array array); 44 45 // Real-time waveform data 46 [Conditional=WEBGL] void getByteTimeDomainData(in Uint8Array array); 47 }; 48 } 49
