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  /external/libopus/celt/
modes.h 75 const opus_int16 *logN;
modes.c 230 opus_int16 *logN;
381 logN = (opus_int16*)opus_alloc(mode->nbEBands*sizeof(opus_int16));
382 if (logN==NULL)
386 logN[i] = log2_frac(mode->eBands[i+1]-mode->eBands[i], BITRES);
387 mode->logN = logN;
429 opus_free((opus_int16*)mode->logN);
rate.c 192 offset = ((m->logN[j]+((LM0+k)<<BITRES))>>1)-QTHETA_OFFSET;
208 offset = ((m->logN[j]+(i<<BITRES))>>1)-(N==2?QTHETA_OFFSET_TWOPHASE:QTHETA_OFFSET);
223 offset = ((m->logN[j] + (i<<BITRES))>>1)-FINE_OFFSET;
450 NClogN = den*(m->logN[j] + logM);
celt_encoder.c 890 int nbEBands, int start, int end, int C, int *offsets, int lsb_depth, const opus_int16 *logN,
910 noise_floor[i] = MULT16_16(QCONST16(0.0625f, DB_SHIFT),logN[i])
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bands.c 690 pulse_cap = m->logN[i]+LM*(1<<BITRES);
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  /external/webrtc/webrtc/modules/audio_coding/codecs/isac/fix/source/
entropy_coding.c 98 /* logN(x) = logN(2)*log2(x) = 0.6931*log2(x). Output in Q8. */
99 /* The input argument X to logN(X) is 2^17 times higher than the
103 X gets 2 thimes higher, i.e. Z = logN(2)*256 = 0.693147180559*256 =
104 177.445678 should be subtracted (since logN() returns a Q8 value).
108 int16_t zeros, log2, frac, logN;
113 logN = (int16_t)(log2 * 22713 >> 15); // log(2) = 0.693147 = 22713 in Q15
114 logN=logN+11; //Scalar compensation which minimizes the (log(x)-logN(x))^2 error over all x
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