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/* (C) 2007-2008 Jean-Marc Valin, CSIRO
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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664db3 |
are met:
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- Redistributions of source code must retain the above copyright
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664db3 |
notice, this list of conditions and the following disclaimer.
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664db3 |
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664db3 |
- Redistributions in binary form must reproduce the above copyright
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664db3 |
notice, this list of conditions and the following disclaimer in the
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664db3 |
documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "quant_bands.h"
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#include "laplace.h"
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#include <math.h>
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#include "os_support.h"
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#include "arch.h"
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#include "mathops.h"
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#include "stack_alloc.h"
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#ifdef FIXED_POINT
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const celt_word16_t eMeans[24] = {11520, -2048, -3072, -640, 256, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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#else
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const celt_word16_t eMeans[24] = {45.f, -8.f, -12.f, -2.5f, 1.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f};
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#endif
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#ifdef FIXED_POINT
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static inline celt_ener_t dB2Amp(celt_ener_t dB)
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{
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celt_ener_t amp;
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if (dB>24659)
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dB=24659;
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amp = PSHR32(celt_exp2(MULT16_16_Q14(21771,dB)),2)-QCONST16(.3f, 14);
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if (amp < 0)
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amp = 0;
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return PSHR32(amp,2);
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}
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#define DBofTWO 24661
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static inline celt_word16_t amp2dB(celt_ener_t amp)
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{
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/* equivalent to return 6.0207*log2(.3+amp) */
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return ROUND16(MULT16_16(24661,celt_log2(ADD32(QCONST32(.3f,14),SHL32(amp,2)))),12);
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/* return DB_SCALING*20*log10(.3+ENER_SCALING_1*amp); */
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}
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#else
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static inline celt_ener_t dB2Amp(celt_ener_t dB)
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{
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celt_ener_t amp;
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/*amp = pow(10, .05*dB)-.3;*/
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amp = exp(0.115129f*dB)-.3f;
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if (amp < 0)
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amp = 0;
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return amp;
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}
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static inline celt_word16_t amp2dB(celt_ener_t amp)
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{
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/*return 20*log10(.3+amp);*/
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return 8.68589f*log(.3f+amp);
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}
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#endif
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static const celt_word16_t base_resolution = QCONST16(6.f,8);
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static const celt_word16_t base_resolution_1 = QCONST16(0.1666667f,15);
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int *quant_prob_alloc(const CELTMode *m)
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{
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int i;
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int *prob;
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prob = celt_alloc(2*m->nbEBands*sizeof(int));
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for (i=0;i<m->nbEBands;i++)
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{
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prob[2*i] = 6000-i*200;
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prob[2*i+1] = ec_laplace_get_start_freq(prob[2*i]);
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}
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return prob;
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}
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void quant_prob_free(int *freq)
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{
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celt_free(freq);
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}
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static void quant_coarse_energy_mono(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, unsigned budget, int *prob, celt_word16_t *error, ec_enc *enc)
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{
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int i;
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unsigned bits;
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celt_word16_t prev = 0;
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celt_word16_t coef = m->ePredCoef;
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celt_word16_t beta;
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/* The .7 is a heuristic */
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beta = MULT16_16_Q15(QCONST16(.8f,15),coef);
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bits = ec_enc_tell(enc, 0);
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/* Encode at a fixed coarse resolution */
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for (i=0;i<m->nbEBands;i++)
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{
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int qi;
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celt_word16_t q; /* dB */
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celt_word16_t x; /* dB */
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celt_word16_t f; /* Q8 */
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celt_word16_t mean = MULT16_16_Q15(Q15ONE-coef,eMeans[i]);
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x = amp2dB(eBands[i]);
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#ifdef FIXED_POINT
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f = MULT16_16_Q15(x-mean-MULT16_16_Q15(coef,oldEBands[i])-prev,base_resolution_1);
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/* Rounding to nearest integer here is really important! */
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qi = (f+128)>>8;
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#else
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f = (x-mean-coef*oldEBands[i]-prev)*base_resolution_1;
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/* Rounding to nearest integer here is really important! */
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qi = (int)floor(.5+f);
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#endif
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/* If we don't have enough bits to encode all the energy, just assume something safe.
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We allow slightly busting the budget here */
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if (ec_enc_tell(enc, 0) - bits > budget)
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{
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qi = -1;
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error[i] = 128;
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} else {
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ec_laplace_encode_start(enc, &qi, prob[2*i], prob[2*i+1]);
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error[i] = f - SHL16(qi,8);
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}
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q = qi*base_resolution;
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oldEBands[i] = mean+MULT16_16_Q15(coef,oldEBands[i])+prev+q;
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if (oldEBands[i] < -QCONST16(12.f,8))
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oldEBands[i] = -QCONST16(12.f,8);
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prev = mean+prev+MULT16_16_Q15(Q15ONE-beta,q);
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}
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}
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static void quant_fine_energy_mono(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, celt_word16_t *error, int *fine_quant, ec_enc *enc)
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{
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int i;
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/* Encode finer resolution */
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for (i=0;i<m->nbEBands;i++)
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{
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664db3 |
int q2;
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664db3 |
celt_int16_t frac = 1<
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celt_word16_t offset = (error[i]+QCONST16(.5f,8))*frac;
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if (fine_quant[i] <= 0)
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continue;
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664db3 |
#ifdef FIXED_POINT
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/* Has to be without rounding */
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q2 = offset>>8;
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#else
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q2 = (int)floor(offset);
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#endif
|
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if (q2 > frac-1)
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q2 = frac-1;
|
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ec_enc_bits(enc, q2, fine_quant[i]);
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664db3 |
#ifdef FIXED_POINT
|
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offset = SUB16(SHR16(SHL16(q2,8)+QCONST16(.5,8),fine_quant[i]),QCONST16(.5f,8));
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#else
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offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f;
|
|
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#endif
|
|
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oldEBands[i] += PSHR32(MULT16_16(DB_SCALING*6,offset),8);
|
|
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/*printf ("%f ", error[i] - offset);*/
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|
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}
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for (i=0;i<m->nbEBands;i++)
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{
|
|
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eBands[i] = dB2Amp(oldEBands[i]);
|
|
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}
|
|
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664db3 |
/*printf ("%d\n", ec_enc_tell(enc, 0)-9);*/
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664db3 |
|
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664db3 |
/*printf ("\n");*/
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664db3 |
}
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664db3 |
|
|
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664db3 |
static void unquant_coarse_energy_mono(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, unsigned budget, int *prob, ec_dec *dec)
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|
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{
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|
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664db3 |
int i;
|
|
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664db3 |
unsigned bits;
|
|
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664db3 |
celt_word16_t prev = 0;
|
|
Packit |
664db3 |
celt_word16_t coef = m->ePredCoef;
|
|
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664db3 |
/* The .7 is a heuristic */
|
|
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664db3 |
celt_word16_t beta = MULT16_16_Q15(QCONST16(.8f,15),coef);
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|
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664db3 |
|
|
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664db3 |
bits = ec_dec_tell(dec, 0);
|
|
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664db3 |
/* Decode at a fixed coarse resolution */
|
|
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664db3 |
for (i=0;i<m->nbEBands;i++)
|
|
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{
|
|
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664db3 |
int qi;
|
|
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664db3 |
celt_word16_t q;
|
|
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664db3 |
celt_word16_t mean = MULT16_16_Q15(Q15ONE-coef,eMeans[i]);
|
|
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664db3 |
/* If we didn't have enough bits to encode all the energy, just assume something safe.
|
|
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664db3 |
We allow slightly busting the budget here */
|
|
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664db3 |
if (ec_dec_tell(dec, 0) - bits > budget)
|
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664db3 |
qi = -1;
|
|
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664db3 |
else
|
|
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664db3 |
qi = ec_laplace_decode_start(dec, prob[2*i], prob[2*i+1]);
|
|
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664db3 |
q = qi*base_resolution;
|
|
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664db3 |
|
|
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664db3 |
oldEBands[i] = mean+MULT16_16_Q15(coef,oldEBands[i])+prev+q;
|
|
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664db3 |
if (oldEBands[i] < -QCONST16(12.f,8))
|
|
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664db3 |
oldEBands[i] = -QCONST16(12.f,8);
|
|
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664db3 |
|
|
Packit |
664db3 |
prev = mean+prev+MULT16_16_Q15(Q15ONE-beta,q);
|
|
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664db3 |
}
|
|
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664db3 |
}
|
|
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664db3 |
|
|
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664db3 |
static void unquant_fine_energy_mono(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int *fine_quant, ec_dec *dec)
|
|
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664db3 |
{
|
|
Packit |
664db3 |
int i;
|
|
Packit |
664db3 |
/* Decode finer resolution */
|
|
Packit |
664db3 |
for (i=0;i<m->nbEBands;i++)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int q2;
|
|
Packit |
664db3 |
celt_word16_t offset;
|
|
Packit |
664db3 |
if (fine_quant[i] <= 0)
|
|
Packit |
664db3 |
continue;
|
|
Packit |
664db3 |
q2 = ec_dec_bits(dec, fine_quant[i]);
|
|
Packit |
664db3 |
#ifdef FIXED_POINT
|
|
Packit |
664db3 |
offset = SUB16(SHR16(SHL16(q2,8)+QCONST16(.5,8),fine_quant[i]),QCONST16(.5f,8));
|
|
Packit |
664db3 |
#else
|
|
Packit |
664db3 |
offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f;
|
|
Packit |
664db3 |
#endif
|
|
Packit |
664db3 |
oldEBands[i] += PSHR32(MULT16_16(DB_SCALING*6,offset),8);
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
for (i=0;i<m->nbEBands;i++)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
eBands[i] = dB2Amp(oldEBands[i]);
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
/*printf ("\n");*/
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
void quant_coarse_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int budget, int *prob, celt_word16_t *error, ec_enc *enc)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int C;
|
|
Packit |
664db3 |
C = m->nbChannels;
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
if (C==1)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
quant_coarse_energy_mono(m, eBands, oldEBands, budget, prob, error, enc);
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
} else {
|
|
Packit |
664db3 |
int c;
|
|
Packit |
664db3 |
for (c=0;c
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int i;
|
|
Packit |
664db3 |
VARDECL(celt_ener_t, E);
|
|
Packit |
664db3 |
SAVE_STACK;
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Packit |
664db3 |
ALLOC(E, m->nbEBands, celt_ener_t);
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Packit |
664db3 |
for (i=0;i<m->nbEBands;i++)
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664db3 |
E[i] = eBands[C*i+c];
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Packit |
664db3 |
quant_coarse_energy_mono(m, E, oldEBands+c*m->nbEBands, budget/C, prob, error+c*m->nbEBands, enc);
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Packit |
664db3 |
RESTORE_STACK;
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Packit |
664db3 |
}
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Packit |
664db3 |
}
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Packit |
664db3 |
}
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Packit |
664db3 |
|
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Packit |
664db3 |
void quant_fine_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, celt_word16_t *error, int *fine_quant, ec_enc *enc)
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|
Packit |
664db3 |
{
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Packit |
664db3 |
int C;
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Packit |
664db3 |
C = m->nbChannels;
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Packit |
664db3 |
|
|
Packit |
664db3 |
if (C==1)
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|
Packit |
664db3 |
{
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|
Packit |
664db3 |
quant_fine_energy_mono(m, eBands, oldEBands, error, fine_quant, enc);
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|
Packit |
664db3 |
|
|
Packit |
664db3 |
} else {
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|
Packit |
664db3 |
int c;
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Packit |
664db3 |
VARDECL(celt_ener_t, E);
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Packit |
664db3 |
ALLOC(E, m->nbEBands, celt_ener_t);
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|
Packit |
664db3 |
for (c=0;c
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|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int i;
|
|
Packit |
664db3 |
SAVE_STACK;
|
|
Packit |
664db3 |
quant_fine_energy_mono(m, E, oldEBands+c*m->nbEBands, error+c*m->nbEBands, fine_quant, enc);
|
|
Packit |
664db3 |
for (i=0;i<m->nbEBands;i++)
|
|
Packit |
664db3 |
eBands[C*i+c] = E[i];
|
|
Packit |
664db3 |
RESTORE_STACK;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
void unquant_coarse_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int budget, int *prob, ec_dec *dec)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int C;
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
C = m->nbChannels;
|
|
Packit |
664db3 |
if (C==1)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
unquant_coarse_energy_mono(m, eBands, oldEBands, budget, prob, dec);
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
else {
|
|
Packit |
664db3 |
int c;
|
|
Packit |
664db3 |
VARDECL(celt_ener_t, E);
|
|
Packit |
664db3 |
SAVE_STACK;
|
|
Packit |
664db3 |
ALLOC(E, m->nbEBands, celt_ener_t);
|
|
Packit |
664db3 |
for (c=0;c
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
unquant_coarse_energy_mono(m, E, oldEBands+c*m->nbEBands, budget/C, prob, dec);
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
RESTORE_STACK;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
void unquant_fine_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int *fine_quant, ec_dec *dec)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int C;
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
C = m->nbChannels;
|
|
Packit |
664db3 |
|
|
Packit |
664db3 |
if (C==1)
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
unquant_fine_energy_mono(m, eBands, oldEBands, fine_quant, dec);
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
else {
|
|
Packit |
664db3 |
int c;
|
|
Packit |
664db3 |
VARDECL(celt_ener_t, E);
|
|
Packit |
664db3 |
SAVE_STACK;
|
|
Packit |
664db3 |
ALLOC(E, m->nbEBands, celt_ener_t);
|
|
Packit |
664db3 |
for (c=0;c
|
|
Packit |
664db3 |
{
|
|
Packit |
664db3 |
int i;
|
|
Packit |
664db3 |
unquant_fine_energy_mono(m, E, oldEBands+c*m->nbEBands, fine_quant, dec);
|
|
Packit |
664db3 |
for (i=0;i<m->nbEBands;i++)
|
|
Packit |
664db3 |
eBands[C*i+c] = E[i];
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
RESTORE_STACK;
|
|
Packit |
664db3 |
}
|
|
Packit |
664db3 |
}
|