321 lines
9.9 KiB
C
321 lines
9.9 KiB
C
/* (C) 2007-2008 Jean-Marc Valin, CSIRO
|
|
*/
|
|
/*
|
|
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.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
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 FOUNDATION 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"
|
|
|
|
#ifdef FIXED_POINT
|
|
const celt_word16_t eMeans[24] = {1920, -341, -512, -107, 43, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
|
|
#else
|
|
const celt_word16_t eMeans[24] = {7.5f, -1.33f, -2.f, -0.42f, 0.17f, 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};
|
|
#endif
|
|
|
|
int intra_decision(celt_word16_t *eBands, celt_word16_t *oldEBands, int len)
|
|
{
|
|
int i;
|
|
celt_word32_t dist = 0;
|
|
for (i=0;i<len;i++)
|
|
{
|
|
celt_word16_t d = SUB16(eBands[i], oldEBands[i]);
|
|
dist = MAC16_16(dist, d,d);
|
|
}
|
|
return SHR32(dist,16) > 2*len;
|
|
}
|
|
|
|
int *quant_prob_alloc(const CELTMode *m)
|
|
{
|
|
int i;
|
|
int *prob;
|
|
prob = celt_alloc(4*m->nbEBands*sizeof(int));
|
|
if (prob==NULL)
|
|
return NULL;
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
prob[2*i] = 6000-i*200;
|
|
prob[2*i+1] = ec_laplace_get_start_freq(prob[2*i]);
|
|
}
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
prob[2*m->nbEBands+2*i] = 9000-i*240;
|
|
prob[2*m->nbEBands+2*i+1] = ec_laplace_get_start_freq(prob[2*m->nbEBands+2*i]);
|
|
}
|
|
return prob;
|
|
}
|
|
|
|
void quant_prob_free(int *freq)
|
|
{
|
|
celt_free(freq);
|
|
}
|
|
|
|
unsigned quant_coarse_energy(const CELTMode *m, celt_word16_t *eBands, celt_word16_t *oldEBands, int budget, int intra, int *prob, celt_word16_t *error, ec_enc *enc)
|
|
{
|
|
int i, c;
|
|
unsigned bits;
|
|
unsigned bits_used = 0;
|
|
celt_word16_t prev[2] = {0,0};
|
|
celt_word16_t coef = m->ePredCoef;
|
|
celt_word16_t beta;
|
|
const int C = CHANNELS(m);
|
|
|
|
if (intra)
|
|
{
|
|
coef = 0;
|
|
prob += 2*m->nbEBands;
|
|
}
|
|
/* The .8 is a heuristic */
|
|
beta = MULT16_16_Q15(QCONST16(.8f,15),coef);
|
|
|
|
bits = (int)ec_enc_tell(enc, 0);
|
|
/* Encode at a fixed coarse resolution */
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
c=0;
|
|
do {
|
|
int qi;
|
|
celt_word16_t q; /* dB */
|
|
celt_word16_t x; /* dB */
|
|
celt_word16_t f; /* Q8 */
|
|
celt_word16_t mean = MULT16_16_Q15(Q15ONE-coef,eMeans[i]);
|
|
x = eBands[i+c*m->nbEBands];
|
|
#ifdef FIXED_POINT
|
|
f = x-mean -MULT16_16_Q15(coef,oldEBands[i+c*m->nbEBands])-prev[c];
|
|
/* Rounding to nearest integer here is really important! */
|
|
qi = (f+128)>>8;
|
|
#else
|
|
f = x-mean-coef*oldEBands[i+c*m->nbEBands]-prev[c];
|
|
/* Rounding to nearest integer here is really important! */
|
|
qi = (int)floor(.5f+f);
|
|
#endif
|
|
/* If we don't have enough bits to encode all the energy, just assume something safe.
|
|
We allow slightly busting the budget here */
|
|
bits_used=(int)ec_enc_tell(enc, 0) - bits;
|
|
if (bits_used > budget)
|
|
{
|
|
qi = -1;
|
|
error[i+c*m->nbEBands] = 128;
|
|
} else {
|
|
ec_laplace_encode_start(enc, &qi, prob[2*i], prob[2*i+1]);
|
|
error[i+c*m->nbEBands] = f - SHL16(qi,8);
|
|
}
|
|
q = qi*DB_SCALING;
|
|
|
|
oldEBands[i+c*m->nbEBands] = MULT16_16_Q15(coef,oldEBands[i+c*m->nbEBands])+(mean+prev[c]+q);
|
|
prev[c] = mean+prev[c]+MULT16_16_Q15(Q15ONE-beta,q);
|
|
} while (++c < C);
|
|
}
|
|
return bits_used;
|
|
}
|
|
|
|
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)
|
|
{
|
|
int i, c;
|
|
const int C = CHANNELS(m);
|
|
|
|
/* Encode finer resolution */
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
celt_int16_t frac = 1<<fine_quant[i];
|
|
if (fine_quant[i] <= 0)
|
|
continue;
|
|
c=0;
|
|
do {
|
|
int q2;
|
|
celt_word16_t offset;
|
|
#ifdef FIXED_POINT
|
|
/* Has to be without rounding */
|
|
q2 = (error[i+c*m->nbEBands]+QCONST16(.5f,8))>>(8-fine_quant[i]);
|
|
#else
|
|
q2 = (int)floor((error[i+c*m->nbEBands]+.5f)*frac);
|
|
#endif
|
|
if (q2 > frac-1)
|
|
q2 = frac-1;
|
|
ec_enc_bits(enc, q2, fine_quant[i]);
|
|
#ifdef FIXED_POINT
|
|
offset = SUB16(SHR16(SHL16(q2,8)+QCONST16(.5,8),fine_quant[i]),QCONST16(.5f,8));
|
|
#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;
|
|
eBands[i+c*m->nbEBands] = log2Amp(oldEBands[i+c*m->nbEBands]);
|
|
/*printf ("%f ", error[i] - offset);*/
|
|
} while (++c < C);
|
|
}
|
|
for (i=0;i<C*m->nbEBands;i++)
|
|
eBands[i] = log2Amp(oldEBands[i]);
|
|
}
|
|
|
|
void quant_energy_finalise(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, celt_word16_t *error, int *fine_quant, int *fine_priority, int bits_left, ec_enc *enc)
|
|
{
|
|
int i, prio, c;
|
|
const int C = CHANNELS(m);
|
|
|
|
/* Use up the remaining bits */
|
|
for (prio=0;prio<2;prio++)
|
|
{
|
|
for (i=0;i<m->nbEBands && bits_left>=C ;i++)
|
|
{
|
|
if (fine_quant[i] >= 7 || fine_priority[i]!=prio)
|
|
continue;
|
|
c=0;
|
|
do {
|
|
int q2;
|
|
celt_word16_t offset;
|
|
q2 = error[i+c*m->nbEBands]<0 ? 0 : 1;
|
|
ec_enc_bits(enc, q2, 1);
|
|
#ifdef FIXED_POINT
|
|
offset = SHR16(SHL16(q2,8)-QCONST16(.5,8),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);
|
|
}
|
|
}
|
|
for (i=0;i<C*m->nbEBands;i++)
|
|
{
|
|
eBands[i] = log2Amp(oldEBands[i]);
|
|
if (oldEBands[i] < -QCONST16(7.f,8))
|
|
oldEBands[i] = -QCONST16(7.f,8);
|
|
}
|
|
}
|
|
|
|
void unquant_coarse_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int budget, int intra, int *prob, ec_dec *dec)
|
|
{
|
|
int i, c;
|
|
unsigned bits;
|
|
celt_word16_t prev[2] = {0, 0};
|
|
celt_word16_t coef = m->ePredCoef;
|
|
celt_word16_t beta;
|
|
const int C = CHANNELS(m);
|
|
|
|
if (intra)
|
|
{
|
|
coef = 0;
|
|
prob += 2*m->nbEBands;
|
|
}
|
|
/* The .8 is a heuristic */
|
|
beta = MULT16_16_Q15(QCONST16(.8f,15),coef);
|
|
|
|
bits = (int)ec_dec_tell(dec, 0);
|
|
/* Decode at a fixed coarse resolution */
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
c=0;
|
|
do {
|
|
int qi;
|
|
celt_word16_t q;
|
|
celt_word16_t mean = MULT16_16_Q15(Q15ONE-coef,eMeans[i]);
|
|
/* If we didn't have enough bits to encode all the energy, just assume something safe.
|
|
We allow slightly busting the budget here */
|
|
if (ec_dec_tell(dec, 0) - bits > budget)
|
|
qi = -1;
|
|
else
|
|
qi = ec_laplace_decode_start(dec, prob[2*i], prob[2*i+1]);
|
|
q = qi*DB_SCALING;
|
|
|
|
oldEBands[i+c*m->nbEBands] = MULT16_16_Q15(coef,oldEBands[i+c*m->nbEBands])+(mean+prev[c]+q);
|
|
prev[c] = mean+prev[c]+MULT16_16_Q15(Q15ONE-beta,q);
|
|
} while (++c < C);
|
|
}
|
|
}
|
|
|
|
void unquant_fine_energy(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int *fine_quant, ec_dec *dec)
|
|
{
|
|
int i, c;
|
|
const int C = CHANNELS(m);
|
|
/* Decode finer resolution */
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
if (fine_quant[i] <= 0)
|
|
continue;
|
|
c=0;
|
|
do {
|
|
int q2;
|
|
celt_word16_t offset;
|
|
q2 = ec_dec_bits(dec, fine_quant[i]);
|
|
#ifdef FIXED_POINT
|
|
offset = SUB16(SHR16(SHL16(q2,8)+QCONST16(.5,8),fine_quant[i]),QCONST16(.5f,8));
|
|
#else
|
|
offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f;
|
|
#endif
|
|
oldEBands[i+c*m->nbEBands] += offset;
|
|
} while (++c < C);
|
|
}
|
|
for (i=0;i<C*m->nbEBands;i++)
|
|
eBands[i] = log2Amp(oldEBands[i]);
|
|
}
|
|
|
|
void unquant_energy_finalise(const CELTMode *m, celt_ener_t *eBands, celt_word16_t *oldEBands, int *fine_quant, int *fine_priority, int bits_left, ec_dec *dec)
|
|
{
|
|
int i, prio, c;
|
|
const int C = CHANNELS(m);
|
|
|
|
/* Use up the remaining bits */
|
|
for (prio=0;prio<2;prio++)
|
|
{
|
|
for (i=0;i<m->nbEBands && bits_left>=C ;i++)
|
|
{
|
|
if (fine_quant[i] >= 7 || fine_priority[i]!=prio)
|
|
continue;
|
|
c=0;
|
|
do {
|
|
int q2;
|
|
celt_word16_t offset;
|
|
q2 = ec_dec_bits(dec, 1);
|
|
#ifdef FIXED_POINT
|
|
offset = SHR16(SHL16(q2,8)-QCONST16(.5,8),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);
|
|
}
|
|
}
|
|
for (i=0;i<C*m->nbEBands;i++)
|
|
{
|
|
eBands[i] = log2Amp(oldEBands[i]);
|
|
if (oldEBands[i] < -QCONST16(7.f,8))
|
|
oldEBands[i] = -QCONST16(7.f,8);
|
|
}
|
|
}
|