| /* Copyright (c) 2007-2008 CSIRO |
| Copyright (c) 2007-2009 Xiph.Org Foundation |
| Written by Jean-Marc Valin */ |
| /* |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| - Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
| OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "quant_bands.h" |
| #include "laplace.h" |
| #include <math.h> |
| #include "os_support.h" |
| #include "arch.h" |
| #include "mathops.h" |
| #include "stack_alloc.h" |
| #include "rate.h" |
| |
| #ifdef FIXED_POINT |
| /* Mean energy in each band quantized in Q4 */ |
| const signed char eMeans[25] = { |
| 103,100, 92, 85, 81, |
| 77, 72, 70, 78, 75, |
| 73, 71, 78, 74, 69, |
| 72, 70, 74, 76, 71, |
| 60, 60, 60, 60, 60 |
| }; |
| #else |
| /* Mean energy in each band quantized in Q4 and converted back to float */ |
| const opus_val16 eMeans[25] = { |
| 6.437500f, 6.250000f, 5.750000f, 5.312500f, 5.062500f, |
| 4.812500f, 4.500000f, 4.375000f, 4.875000f, 4.687500f, |
| 4.562500f, 4.437500f, 4.875000f, 4.625000f, 4.312500f, |
| 4.500000f, 4.375000f, 4.625000f, 4.750000f, 4.437500f, |
| 3.750000f, 3.750000f, 3.750000f, 3.750000f, 3.750000f |
| }; |
| #endif |
| /* prediction coefficients: 0.9, 0.8, 0.65, 0.5 */ |
| #ifdef FIXED_POINT |
| static const opus_val16 pred_coef[4] = {29440, 26112, 21248, 16384}; |
| static const opus_val16 beta_coef[4] = {30147, 22282, 12124, 6554}; |
| static const opus_val16 beta_intra = 4915; |
| #else |
| static const opus_val16 pred_coef[4] = {29440/32768., 26112/32768., 21248/32768., 16384/32768.}; |
| static const opus_val16 beta_coef[4] = {30147/32768., 22282/32768., 12124/32768., 6554/32768.}; |
| static const opus_val16 beta_intra = 4915/32768.; |
| #endif |
| |
| /*Parameters of the Laplace-like probability models used for the coarse energy. |
| There is one pair of parameters for each frame size, prediction type |
| (inter/intra), and band number. |
| The first number of each pair is the probability of 0, and the second is the |
| decay rate, both in Q8 precision.*/ |
| static const unsigned char e_prob_model[4][2][42] = { |
| /*120 sample frames.*/ |
| { |
| /*Inter*/ |
| { |
| 72, 127, 65, 129, 66, 128, 65, 128, 64, 128, 62, 128, 64, 128, |
| 64, 128, 92, 78, 92, 79, 92, 78, 90, 79, 116, 41, 115, 40, |
| 114, 40, 132, 26, 132, 26, 145, 17, 161, 12, 176, 10, 177, 11 |
| }, |
| /*Intra*/ |
| { |
| 24, 179, 48, 138, 54, 135, 54, 132, 53, 134, 56, 133, 55, 132, |
| 55, 132, 61, 114, 70, 96, 74, 88, 75, 88, 87, 74, 89, 66, |
| 91, 67, 100, 59, 108, 50, 120, 40, 122, 37, 97, 43, 78, 50 |
| } |
| }, |
| /*240 sample frames.*/ |
| { |
| /*Inter*/ |
| { |
| 83, 78, 84, 81, 88, 75, 86, 74, 87, 71, 90, 73, 93, 74, |
| 93, 74, 109, 40, 114, 36, 117, 34, 117, 34, 143, 17, 145, 18, |
| 146, 19, 162, 12, 165, 10, 178, 7, 189, 6, 190, 8, 177, 9 |
| }, |
| /*Intra*/ |
| { |
| 23, 178, 54, 115, 63, 102, 66, 98, 69, 99, 74, 89, 71, 91, |
| 73, 91, 78, 89, 86, 80, 92, 66, 93, 64, 102, 59, 103, 60, |
| 104, 60, 117, 52, 123, 44, 138, 35, 133, 31, 97, 38, 77, 45 |
| } |
| }, |
| /*480 sample frames.*/ |
| { |
| /*Inter*/ |
| { |
| 61, 90, 93, 60, 105, 42, 107, 41, 110, 45, 116, 38, 113, 38, |
| 112, 38, 124, 26, 132, 27, 136, 19, 140, 20, 155, 14, 159, 16, |
| 158, 18, 170, 13, 177, 10, 187, 8, 192, 6, 175, 9, 159, 10 |
| }, |
| /*Intra*/ |
| { |
| 21, 178, 59, 110, 71, 86, 75, 85, 84, 83, 91, 66, 88, 73, |
| 87, 72, 92, 75, 98, 72, 105, 58, 107, 54, 115, 52, 114, 55, |
| 112, 56, 129, 51, 132, 40, 150, 33, 140, 29, 98, 35, 77, 42 |
| } |
| }, |
| /*960 sample frames.*/ |
| { |
| /*Inter*/ |
| { |
| 42, 121, 96, 66, 108, 43, 111, 40, 117, 44, 123, 32, 120, 36, |
| 119, 33, 127, 33, 134, 34, 139, 21, 147, 23, 152, 20, 158, 25, |
| 154, 26, 166, 21, 173, 16, 184, 13, 184, 10, 150, 13, 139, 15 |
| }, |
| /*Intra*/ |
| { |
| 22, 178, 63, 114, 74, 82, 84, 83, 92, 82, 103, 62, 96, 72, |
| 96, 67, 101, 73, 107, 72, 113, 55, 118, 52, 125, 52, 118, 52, |
| 117, 55, 135, 49, 137, 39, 157, 32, 145, 29, 97, 33, 77, 40 |
| } |
| } |
| }; |
| |
| static const unsigned char small_energy_icdf[3]={2,1,0}; |
| |
| static opus_val32 loss_distortion(const opus_val16 *eBands, opus_val16 *oldEBands, int start, int end, int len, int C) |
| { |
| int c, i; |
| opus_val32 dist = 0; |
| c=0; do { |
| for (i=start;i<end;i++) |
| { |
| opus_val16 d = SUB16(SHR16(eBands[i+c*len], 3), SHR16(oldEBands[i+c*len], 3)); |
| dist = MAC16_16(dist, d,d); |
| } |
| } while (++c<C); |
| return MIN32(200,SHR32(dist,2*DB_SHIFT-6)); |
| } |
| |
| static int quant_coarse_energy_impl(const CELTMode *m, int start, int end, |
| const opus_val16 *eBands, opus_val16 *oldEBands, |
| opus_int32 budget, opus_int32 tell, |
| const unsigned char *prob_model, opus_val16 *error, ec_enc *enc, |
| int C, int LM, int intra, opus_val16 max_decay, int lfe) |
| { |
| int i, c; |
| int badness = 0; |
| opus_val32 prev[2] = {0,0}; |
| opus_val16 coef; |
| opus_val16 beta; |
| |
| if (tell+3 <= budget) |
| ec_enc_bit_logp(enc, intra, 3); |
| if (intra) |
| { |
| coef = 0; |
| beta = beta_intra; |
| } else { |
| beta = beta_coef[LM]; |
| coef = pred_coef[LM]; |
| } |
| |
| /* Encode at a fixed coarse resolution */ |
| for (i=start;i<end;i++) |
| { |
| c=0; |
| do { |
| int bits_left; |
| int qi, qi0; |
| opus_val32 q; |
| opus_val16 x; |
| opus_val32 f, tmp; |
| opus_val16 oldE; |
| opus_val16 decay_bound; |
| x = eBands[i+c*m->nbEBands]; |
| oldE = MAX16(-QCONST16(9.f,DB_SHIFT), oldEBands[i+c*m->nbEBands]); |
| #ifdef FIXED_POINT |
| f = SHL32(EXTEND32(x),7) - PSHR32(MULT16_16(coef,oldE), 8) - prev[c]; |
| /* Rounding to nearest integer here is really important! */ |
| qi = (f+QCONST32(.5f,DB_SHIFT+7))>>(DB_SHIFT+7); |
| decay_bound = EXTRACT16(MAX32(-QCONST16(28.f,DB_SHIFT), |
| SUB32((opus_val32)oldEBands[i+c*m->nbEBands],max_decay))); |
| #else |
| f = x-coef*oldE-prev[c]; |
| /* Rounding to nearest integer here is really important! */ |
| qi = (int)floor(.5f+f); |
| decay_bound = MAX16(-QCONST16(28.f,DB_SHIFT), oldEBands[i+c*m->nbEBands]) - max_decay; |
| #endif |
| /* Prevent the energy from going down too quickly (e.g. for bands |
| that have just one bin) */ |
| if (qi < 0 && x < decay_bound) |
| { |
| qi += (int)SHR16(SUB16(decay_bound,x), DB_SHIFT); |
| if (qi > 0) |
| qi = 0; |
| } |
| qi0 = qi; |
| /* If we don't have enough bits to encode all the energy, just assume |
| something safe. */ |
| tell = ec_tell(enc); |
| bits_left = budget-tell-3*C*(end-i); |
| if (i!=start && bits_left < 30) |
| { |
| if (bits_left < 24) |
| qi = IMIN(1, qi); |
| if (bits_left < 16) |
| qi = IMAX(-1, qi); |
| } |
| if (lfe && i>=2) |
| qi = IMIN(qi, 0); |
| if (budget-tell >= 15) |
| { |
| int pi; |
| pi = 2*IMIN(i,20); |
| ec_laplace_encode(enc, &qi, |
| prob_model[pi]<<7, prob_model[pi+1]<<6); |
| } |
| else if(budget-tell >= 2) |
| { |
| qi = IMAX(-1, IMIN(qi, 1)); |
| ec_enc_icdf(enc, 2*qi^-(qi<0), small_energy_icdf, 2); |
| } |
| else if(budget-tell >= 1) |
| { |
| qi = IMIN(0, qi); |
| ec_enc_bit_logp(enc, -qi, 1); |
| } |
| else |
| qi = -1; |
| error[i+c*m->nbEBands] = PSHR32(f,7) - SHL16(qi,DB_SHIFT); |
| badness += abs(qi0-qi); |
| q = (opus_val32)SHL32(EXTEND32(qi),DB_SHIFT); |
| |
| tmp = PSHR32(MULT16_16(coef,oldE),8) + prev[c] + SHL32(q,7); |
| #ifdef FIXED_POINT |
| tmp = MAX32(-QCONST32(28.f, DB_SHIFT+7), tmp); |
| #endif |
| oldEBands[i+c*m->nbEBands] = PSHR32(tmp, 7); |
| prev[c] = prev[c] + SHL32(q,7) - MULT16_16(beta,PSHR32(q,8)); |
| } while (++c < C); |
| } |
| return lfe ? 0 : badness; |
| } |
| |
| void quant_coarse_energy(const CELTMode *m, int start, int end, int effEnd, |
| const opus_val16 *eBands, opus_val16 *oldEBands, opus_uint32 budget, |
| opus_val16 *error, ec_enc *enc, int C, int LM, int nbAvailableBytes, |
| int force_intra, opus_val32 *delayedIntra, int two_pass, int loss_rate, int lfe) |
| { |
| int intra; |
| opus_val16 max_decay; |
| VARDECL(opus_val16, oldEBands_intra); |
| VARDECL(opus_val16, error_intra); |
| ec_enc enc_start_state; |
| opus_uint32 tell; |
| int badness1=0; |
| opus_int32 intra_bias; |
| opus_val32 new_distortion; |
| SAVE_STACK; |
| |
| intra = force_intra || (!two_pass && *delayedIntra>2*C*(end-start) && nbAvailableBytes > (end-start)*C); |
| intra_bias = (opus_int32)((budget**delayedIntra*loss_rate)/(C*512)); |
| new_distortion = loss_distortion(eBands, oldEBands, start, effEnd, m->nbEBands, C); |
| |
| tell = ec_tell(enc); |
| if (tell+3 > budget) |
| two_pass = intra = 0; |
| |
| max_decay = QCONST16(16.f,DB_SHIFT); |
| if (end-start>10) |
| { |
| #ifdef FIXED_POINT |
| max_decay = MIN32(max_decay, SHL32(EXTEND32(nbAvailableBytes),DB_SHIFT-3)); |
| #else |
| max_decay = MIN32(max_decay, .125f*nbAvailableBytes); |
| #endif |
| } |
| if (lfe) |
| max_decay = QCONST16(3.f,DB_SHIFT); |
| enc_start_state = *enc; |
| |
| ALLOC(oldEBands_intra, C*m->nbEBands, opus_val16); |
| ALLOC(error_intra, C*m->nbEBands, opus_val16); |
| OPUS_COPY(oldEBands_intra, oldEBands, C*m->nbEBands); |
| |
| if (two_pass || intra) |
| { |
| badness1 = quant_coarse_energy_impl(m, start, end, eBands, oldEBands_intra, budget, |
| tell, e_prob_model[LM][1], error_intra, enc, C, LM, 1, max_decay, lfe); |
| } |
| |
| if (!intra) |
| { |
| unsigned char *intra_buf; |
| ec_enc enc_intra_state; |
| opus_int32 tell_intra; |
| opus_uint32 nstart_bytes; |
| opus_uint32 nintra_bytes; |
| opus_uint32 save_bytes; |
| int badness2; |
| VARDECL(unsigned char, intra_bits); |
| |
| tell_intra = ec_tell_frac(enc); |
| |
| enc_intra_state = *enc; |
| |
| nstart_bytes = ec_range_bytes(&enc_start_state); |
| nintra_bytes = ec_range_bytes(&enc_intra_state); |
| intra_buf = ec_get_buffer(&enc_intra_state) + nstart_bytes; |
| save_bytes = nintra_bytes-nstart_bytes; |
| if (save_bytes == 0) |
| save_bytes = ALLOC_NONE; |
| ALLOC(intra_bits, save_bytes, unsigned char); |
| /* Copy bits from intra bit-stream */ |
| OPUS_COPY(intra_bits, intra_buf, nintra_bytes - nstart_bytes); |
| |
| *enc = enc_start_state; |
| |
| badness2 = quant_coarse_energy_impl(m, start, end, eBands, oldEBands, budget, |
| tell, e_prob_model[LM][intra], error, enc, C, LM, 0, max_decay, lfe); |
| |
| if (two_pass && (badness1 < badness2 || (badness1 == badness2 && ((opus_int32)ec_tell_frac(enc))+intra_bias > tell_intra))) |
| { |
| *enc = enc_intra_state; |
| /* Copy intra bits to bit-stream */ |
| OPUS_COPY(intra_buf, intra_bits, nintra_bytes - nstart_bytes); |
| OPUS_COPY(oldEBands, oldEBands_intra, C*m->nbEBands); |
| OPUS_COPY(error, error_intra, C*m->nbEBands); |
| intra = 1; |
| } |
| } else { |
| OPUS_COPY(oldEBands, oldEBands_intra, C*m->nbEBands); |
| OPUS_COPY(error, error_intra, C*m->nbEBands); |
| } |
| |
| if (intra) |
| *delayedIntra = new_distortion; |
| else |
| *delayedIntra = ADD32(MULT16_32_Q15(MULT16_16_Q15(pred_coef[LM], pred_coef[LM]),*delayedIntra), |
| new_distortion); |
| |
| RESTORE_STACK; |
| } |
| |
| void quant_fine_energy(const CELTMode *m, int start, int end, opus_val16 *oldEBands, opus_val16 *error, int *fine_quant, ec_enc *enc, int C) |
| { |
| int i, c; |
| |
| /* Encode finer resolution */ |
| for (i=start;i<end;i++) |
| { |
| opus_int16 frac = 1<<fine_quant[i]; |
| if (fine_quant[i] <= 0) |
| continue; |
| c=0; |
| do { |
| int q2; |
| opus_val16 offset; |
| #ifdef FIXED_POINT |
| /* Has to be without rounding */ |
| q2 = (error[i+c*m->nbEBands]+QCONST16(.5f,DB_SHIFT))>>(DB_SHIFT-fine_quant[i]); |
| #else |
| q2 = (int)floor((error[i+c*m->nbEBands]+.5f)*frac); |
| #endif |
| if (q2 > frac-1) |
| q2 = frac-1; |
| if (q2<0) |
| q2 = 0; |
| ec_enc_bits(enc, q2, fine_quant[i]); |
| #ifdef FIXED_POINT |
| offset = SUB16(SHR32(SHL32(EXTEND32(q2),DB_SHIFT)+QCONST16(.5f,DB_SHIFT),fine_quant[i]),QCONST16(.5f,DB_SHIFT)); |
| #else |
| offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f; |
| #endif |
| oldEBands[i+c*m->nbEBands] += offset; |
| error[i+c*m->nbEBands] -= offset; |
| /*printf ("%f ", error[i] - offset);*/ |
| } while (++c < C); |
| } |
| } |
| |
| void quant_energy_finalise(const CELTMode *m, int start, int end, opus_val16 *oldEBands, opus_val16 *error, int *fine_quant, int *fine_priority, int bits_left, ec_enc *enc, int C) |
| { |
| int i, prio, c; |
| |
| /* Use up the remaining bits */ |
| for (prio=0;prio<2;prio++) |
| { |
| for (i=start;i<end && bits_left>=C ;i++) |
| { |
| if (fine_quant[i] >= MAX_FINE_BITS || fine_priority[i]!=prio) |
| continue; |
| c=0; |
| do { |
| int q2; |
| opus_val16 offset; |
| q2 = error[i+c*m->nbEBands]<0 ? 0 : 1; |
| ec_enc_bits(enc, q2, 1); |
| #ifdef FIXED_POINT |
| offset = SHR16(SHL16(q2,DB_SHIFT)-QCONST16(.5f,DB_SHIFT),fine_quant[i]+1); |
| #else |
| offset = (q2-.5f)*(1<<(14-fine_quant[i]-1))*(1.f/16384); |
| #endif |
| oldEBands[i+c*m->nbEBands] += offset; |
| error[i+c*m->nbEBands] -= offset; |
| bits_left--; |
| } while (++c < C); |
| } |
| } |
| } |
| |
| void unquant_coarse_energy(const CELTMode *m, int start, int end, opus_val16 *oldEBands, int intra, ec_dec *dec, int C, int LM) |
| { |
| const unsigned char *prob_model = e_prob_model[LM][intra]; |
| int i, c; |
| opus_val32 prev[2] = {0, 0}; |
| opus_val16 coef; |
| opus_val16 beta; |
| opus_int32 budget; |
| opus_int32 tell; |
| |
| if (intra) |
| { |
| coef = 0; |
| beta = beta_intra; |
| } else { |
| beta = beta_coef[LM]; |
| coef = pred_coef[LM]; |
| } |
| |
| budget = dec->storage*8; |
| |
| /* Decode at a fixed coarse resolution */ |
| for (i=start;i<end;i++) |
| { |
| c=0; |
| do { |
| int qi; |
| opus_val32 q; |
| opus_val32 tmp; |
| /* It would be better to express this invariant as a |
| test on C at function entry, but that isn't enough |
| to make the static analyzer happy. */ |
| celt_assert(c<2); |
| tell = ec_tell(dec); |
| if(budget-tell>=15) |
| { |
| int pi; |
| pi = 2*IMIN(i,20); |
| qi = ec_laplace_decode(dec, |
| prob_model[pi]<<7, prob_model[pi+1]<<6); |
| } |
| else if(budget-tell>=2) |
| { |
| qi = ec_dec_icdf(dec, small_energy_icdf, 2); |
| qi = (qi>>1)^-(qi&1); |
| } |
| else if(budget-tell>=1) |
| { |
| qi = -ec_dec_bit_logp(dec, 1); |
| } |
| else |
| qi = -1; |
| q = (opus_val32)SHL32(EXTEND32(qi),DB_SHIFT); |
| |
| oldEBands[i+c*m->nbEBands] = MAX16(-QCONST16(9.f,DB_SHIFT), oldEBands[i+c*m->nbEBands]); |
| tmp = PSHR32(MULT16_16(coef,oldEBands[i+c*m->nbEBands]),8) + prev[c] + SHL32(q,7); |
| #ifdef FIXED_POINT |
| tmp = MAX32(-QCONST32(28.f, DB_SHIFT+7), tmp); |
| #endif |
| oldEBands[i+c*m->nbEBands] = PSHR32(tmp, 7); |
| prev[c] = prev[c] + SHL32(q,7) - MULT16_16(beta,PSHR32(q,8)); |
| } while (++c < C); |
| } |
| } |
| |
| void unquant_fine_energy(const CELTMode *m, int start, int end, opus_val16 *oldEBands, int *fine_quant, ec_dec *dec, int C) |
| { |
| int i, c; |
| /* Decode finer resolution */ |
| for (i=start;i<end;i++) |
| { |
| if (fine_quant[i] <= 0) |
| continue; |
| c=0; |
| do { |
| int q2; |
| opus_val16 offset; |
| q2 = ec_dec_bits(dec, fine_quant[i]); |
| #ifdef FIXED_POINT |
| offset = SUB16(SHR32(SHL32(EXTEND32(q2),DB_SHIFT)+QCONST16(.5f,DB_SHIFT),fine_quant[i]),QCONST16(.5f,DB_SHIFT)); |
| #else |
| offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f; |
| #endif |
| oldEBands[i+c*m->nbEBands] += offset; |
| } while (++c < C); |
| } |
| } |
| |
| void unquant_energy_finalise(const CELTMode *m, int start, int end, opus_val16 *oldEBands, int *fine_quant, int *fine_priority, int bits_left, ec_dec *dec, int C) |
| { |
| int i, prio, c; |
| |
| /* Use up the remaining bits */ |
| for (prio=0;prio<2;prio++) |
| { |
| for (i=start;i<end && bits_left>=C ;i++) |
| { |
| if (fine_quant[i] >= MAX_FINE_BITS || fine_priority[i]!=prio) |
| continue; |
| c=0; |
| do { |
| int q2; |
| opus_val16 offset; |
| q2 = ec_dec_bits(dec, 1); |
| #ifdef FIXED_POINT |
| offset = SHR16(SHL16(q2,DB_SHIFT)-QCONST16(.5f,DB_SHIFT),fine_quant[i]+1); |
| #else |
| offset = (q2-.5f)*(1<<(14-fine_quant[i]-1))*(1.f/16384); |
| #endif |
| oldEBands[i+c*m->nbEBands] += offset; |
| bits_left--; |
| } while (++c < C); |
| } |
| } |
| } |
| |
| void amp2Log2(const CELTMode *m, int effEnd, int end, |
| celt_ener *bandE, opus_val16 *bandLogE, int C) |
| { |
| int c, i; |
| c=0; |
| do { |
| for (i=0;i<effEnd;i++) |
| { |
| bandLogE[i+c*m->nbEBands] = |
| celt_log2(bandE[i+c*m->nbEBands]) |
| - SHL16((opus_val16)eMeans[i],6); |
| #ifdef FIXED_POINT |
| /* Compensate for bandE[] being Q12 but celt_log2() taking a Q14 input. */ |
| bandLogE[i+c*m->nbEBands] += QCONST16(2.f, DB_SHIFT); |
| #endif |
| } |
| for (i=effEnd;i<end;i++) |
| bandLogE[c*m->nbEBands+i] = -QCONST16(14.f,DB_SHIFT); |
| } while (++c < C); |
| } |
