8  *      http://www.apache.org/licenses/LICENSE-2.0
35     int state = 0; // can be -1, 0, +1  in countZeroCrossingsWithHysteresis()
42         } else if (input[i] <= -kHysteresisLevel) {  in countZeroCrossingsWithHysteresis()
46             state = -1;  in countZeroCrossingsWithHysteresis()
56  * Glitches have a high value in the second derivative.
59         MultiChannelResampler::Quality quality) {  in checkResampler()  argument
75             phase -= 2.0;  in checkResampler()
85                                                  quality));  in checkResampler()
91         if (mcResampler->isWriteNeeded()) {  in checkResampler()
92             mcResampler->writeNextFrame(input);  in checkResampler()
94             inputFramesLeft--;  in checkResampler()
96             mcResampler->readNextFrame(output);  in checkResampler()
103     while (!mcResampler->isWriteNeeded()) {  in checkResampler()
104         mcResampler->readNextFrame(output);  in checkResampler()
112     EXPECT_GT(numRead, kNumOutputSamples - kMaxAlgorithmicFrameLoss);  in checkResampler()
118     EXPECT_LE(abs(sourceZeroCrossingCount - sinkZeroCrossingCount), kMaxZeroCrossingDelta);  in checkResampler()
123     float previousSlope = output[1] - output[0];  in checkResampler()
125         float slope = output[i] - previousValue;  in checkResampler()
126         float slopeDelta = fabs(slope - previousSlope);  in checkResampler()
146     const MultiChannelResampler::Quality qualities[] =  in TEST()
148         MultiChannelResampler::Quality::Fastest,  in TEST()
149         MultiChannelResampler::Quality::Low,  in TEST()
150         MultiChannelResampler::Quality::Medium,  in TEST()
151         MultiChannelResampler::Quality::High,  in TEST()
152         MultiChannelResampler::Quality::Best  in TEST()
156             for (auto quality : qualities) {  in TEST()  local
158                     checkResampler(srcRate, destRate, quality);  in TEST()
166     checkResampler(8000, 11025, MultiChannelResampler::Quality::Best);  in TEST()
169     checkResampler(8000, 48000, MultiChannelResampler::Quality::Best);  in TEST()
173     checkResampler(8000, 44100, MultiChannelResampler::Quality::Best);  in TEST()
177     checkResampler(11025, 24000, MultiChannelResampler::Quality::Best);  in TEST()
181     checkResampler(11025, 48000, MultiChannelResampler::Quality::Fastest);  in TEST()
184     checkResampler(11025, 48000, MultiChannelResampler::Quality::Low);  in TEST()
187     checkResampler(11025, 48000, MultiChannelResampler::Quality::Medium);  in TEST()
190     checkResampler(11025, 48000, MultiChannelResampler::Quality::High);  in TEST()
194     checkResampler(11025, 48000, MultiChannelResampler::Quality::Best);  in TEST()
198     checkResampler(11025, 44100, MultiChannelResampler::Quality::Best);  in TEST()
202    checkResampler(11025, 88200, MultiChannelResampler::Quality::Best);  in TEST()
206     checkResampler(16000, 48000, MultiChannelResampler::Quality::Best);  in TEST()
210     checkResampler(44100, 48000, MultiChannelResampler::Quality::Low);  in TEST()
213     checkResampler(44100, 48000, MultiChannelResampler::Quality::Best);  in TEST()
218     checkResampler(48000, 11025, MultiChannelResampler::Quality::Best);  in TEST()
221     checkResampler(48000, 44100, MultiChannelResampler::Quality::Best);  in TEST()
224     checkResampler(44100, 11025, MultiChannelResampler::Quality::Best);  in TEST()