mirror of
https://github.com/DrBeef/ioq3quest.git
synced 2024-11-24 04:51:25 +00:00
570 lines
18 KiB
C
570 lines
18 KiB
C
/* 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 Q6 */
|
|
static 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 Q6 and converted back to float */
|
|
static 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 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 (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 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 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;
|
|
|
|
/* Encode the global flags using a simple probability model
|
|
(first symbols in the stream) */
|
|
|
|
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
|
|
}
|
|
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);
|
|
}
|
|
|
|
if (!intra)
|
|
{
|
|
unsigned char *intra_buf;
|
|
ec_enc enc_intra_state;
|
|
opus_int32 tell_intra;
|
|
opus_uint32 nstart_bytes;
|
|
opus_uint32 nintra_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;
|
|
ALLOC(intra_bits, nintra_bytes-nstart_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);
|
|
|
|
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;
|
|
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 log2Amp(const CELTMode *m, int start, int end,
|
|
celt_ener *eBands, const opus_val16 *oldEBands, int C)
|
|
{
|
|
int c, i;
|
|
c=0;
|
|
do {
|
|
for (i=0;i<start;i++)
|
|
eBands[i+c*m->nbEBands] = 0;
|
|
for (;i<end;i++)
|
|
{
|
|
opus_val16 lg = ADD16(oldEBands[i+c*m->nbEBands],
|
|
SHL16((opus_val16)eMeans[i],6));
|
|
eBands[i+c*m->nbEBands] = PSHR32(celt_exp2(lg),4);
|
|
}
|
|
for (;i<m->nbEBands;i++)
|
|
eBands[i+c*m->nbEBands] = 0;
|
|
} 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(SHL32(bandE[i+c*m->nbEBands],2))
|
|
- SHL16((opus_val16)eMeans[i],6);
|
|
for (i=effEnd;i<end;i++)
|
|
bandLogE[c*m->nbEBands+i] = -QCONST16(14.f,DB_SHIFT);
|
|
} while (++c < C);
|
|
}
|