Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(39)

Side by Side Diff: third_party/WebKit/Source/platform/audio/FFTFrame.cpp

Issue 2384073002: reflow comments in platform/audio (Closed)
Patch Set: Created 4 years, 2 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
OLDNEW
1 /* 1 /*
2 * Copyright (C) 2010 Google Inc. All rights reserved. 2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 7 *
8 * 1. Redistributions of source code must retain the above copyright 8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright 10 * 2. Redistributions in binary form must reproduce the above copyright
(...skipping 39 matching lines...) Expand 10 before | Expand all | Expand 10 after
50 50
51 std::unique_ptr<FFTFrame> FFTFrame::createInterpolatedFrame( 51 std::unique_ptr<FFTFrame> FFTFrame::createInterpolatedFrame(
52 const FFTFrame& frame1, 52 const FFTFrame& frame1,
53 const FFTFrame& frame2, 53 const FFTFrame& frame2,
54 double x) { 54 double x) {
55 std::unique_ptr<FFTFrame> newFrame = 55 std::unique_ptr<FFTFrame> newFrame =
56 wrapUnique(new FFTFrame(frame1.fftSize())); 56 wrapUnique(new FFTFrame(frame1.fftSize()));
57 57
58 newFrame->interpolateFrequencyComponents(frame1, frame2, x); 58 newFrame->interpolateFrequencyComponents(frame1, frame2, x);
59 59
60 // In the time-domain, the 2nd half of the response must be zero, to avoid cir cular convolution aliasing... 60 // In the time-domain, the 2nd half of the response must be zero, to avoid
61 // circular convolution aliasing...
61 int fftSize = newFrame->fftSize(); 62 int fftSize = newFrame->fftSize();
62 AudioFloatArray buffer(fftSize); 63 AudioFloatArray buffer(fftSize);
63 newFrame->doInverseFFT(buffer.data()); 64 newFrame->doInverseFFT(buffer.data());
64 buffer.zeroRange(fftSize / 2, fftSize); 65 buffer.zeroRange(fftSize / 2, fftSize);
65 66
66 // Put back into frequency domain. 67 // Put back into frequency domain.
67 newFrame->doFFT(buffer.data()); 68 newFrame->doFFT(buffer.data());
68 69
69 return newFrame; 70 return newFrame;
70 } 71 }
(...skipping 126 matching lines...) Expand 10 before | Expand all | Expand 10 after
197 // Unwrap 198 // Unwrap
198 if (deltaPhase < -piDouble) 199 if (deltaPhase < -piDouble)
199 deltaPhase += twoPiDouble; 200 deltaPhase += twoPiDouble;
200 if (deltaPhase > piDouble) 201 if (deltaPhase > piDouble)
201 deltaPhase -= twoPiDouble; 202 deltaPhase -= twoPiDouble;
202 203
203 aveSum += mag * deltaPhase; 204 aveSum += mag * deltaPhase;
204 weightSum += mag; 205 weightSum += mag;
205 } 206 }
206 207
207 // Note how we invert the phase delta wrt frequency since this is how group de lay is defined 208 // Note how we invert the phase delta wrt frequency since this is how group
209 // delay is defined
208 double ave = aveSum / weightSum; 210 double ave = aveSum / weightSum;
209 double aveSampleDelay = -ave / samplePhaseDelay; 211 double aveSampleDelay = -ave / samplePhaseDelay;
210 212
211 // Leave 20 sample headroom (for leading edge of impulse) 213 // Leave 20 sample headroom (for leading edge of impulse)
212 if (aveSampleDelay > 20.0) 214 if (aveSampleDelay > 20.0)
213 aveSampleDelay -= 20.0; 215 aveSampleDelay -= 20.0;
214 216
215 // Remove average group delay (minus 20 samples for headroom) 217 // Remove average group delay (minus 20 samples for headroom)
216 addConstantGroupDelay(-aveSampleDelay); 218 addConstantGroupDelay(-aveSampleDelay);
217 219
(...skipping 43 matching lines...) Expand 10 before | Expand all | Expand 10 after
261 float imag0 = imagP1[0]; 263 float imag0 = imagP1[0];
262 264
263 VectorMath::zvmul(realP1, imagP1, realP2, imagP2, realP1, imagP1, halfSize); 265 VectorMath::zvmul(realP1, imagP1, realP2, imagP2, realP1, imagP1, halfSize);
264 266
265 // Multiply the packed DC/nyquist component 267 // Multiply the packed DC/nyquist component
266 realP1[0] = real0 * realP2[0]; 268 realP1[0] = real0 * realP2[0];
267 imagP1[0] = imag0 * imagP2[0]; 269 imagP1[0] = imag0 * imagP2[0];
268 } 270 }
269 271
270 } // namespace blink 272 } // namespace blink
OLDNEW

Powered by Google App Engine
This is Rietveld 408576698