| 78e65cd7 |
/*
* AAC coefficients encoder
* Copyright (C) 2008-2009 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/** |
| ba87f080 |
* @file |
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* AAC coefficients encoder
*/
/***********************************
* TODOs:
* speedup quantizer selection
* add sane pulse detection
***********************************/
|
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#include "libavutil/libm.h" // brought forward to work around cygwin header breakage
|
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#include <float.h> |
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#include "libavutil/mathematics.h" |
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#include "avcodec.h"
#include "put_bits.h"
#include "aac.h"
#include "aacenc.h"
#include "aactab.h"
/** bits needed to code codebook run value for long windows */
static const uint8_t run_value_bits_long[64] = {
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10,
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 15
};
/** bits needed to code codebook run value for short windows */
static const uint8_t run_value_bits_short[16] = {
3, 3, 3, 3, 3, 3, 3, 6, 6, 6, 6, 6, 6, 6, 6, 9
};
|
| 99d61d34 |
static const uint8_t *run_value_bits[2] = { |
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run_value_bits_long, run_value_bits_short
};
/**
* Quantize one coefficient.
* @return absolute value of the quantized coefficient
* @see 3GPP TS26.403 5.6.2 "Scalefactor determination"
*/
static av_always_inline int quant(float coef, const float Q)
{ |
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float a = coef * Q;
return sqrtf(a * sqrtf(a)) + 0.4054; |
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}
|
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static void quantize_bands(int *out, const float *in, const float *scaled, |
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int size, float Q34, int is_signed, int maxval) |
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{
int i;
double qc;
for (i = 0; i < size; i++) {
qc = scaled[i] * Q34; |
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out[i] = (int)FFMIN(qc + 0.4054, (double)maxval); |
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if (is_signed && in[i] < 0.0f) { |
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out[i] = -out[i]; |
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}
}
}
|
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static void abs_pow34_v(float *out, const float *in, const int size) |
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{
#ifndef USE_REALLY_FULL_SEARCH
int i; |
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for (i = 0; i < size; i++) {
float a = fabsf(in[i]);
out[i] = sqrtf(a * sqrtf(a));
} |
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#endif /* USE_REALLY_FULL_SEARCH */
}
static const uint8_t aac_cb_range [12] = {0, 3, 3, 3, 3, 9, 9, 8, 8, 13, 13, 17};
static const uint8_t aac_cb_maxval[12] = {0, 1, 1, 2, 2, 4, 4, 7, 7, 12, 12, 16};
/**
* Calculate rate distortion cost for quantizing with given codebook
*
* @return quantization distortion
*/ |
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static av_always_inline float quantize_and_encode_band_cost_template(
struct AACEncContext *s, |
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PutBitContext *pb, const float *in, |
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const float *scaled, int size, int scale_idx,
int cb, const float lambda, const float uplim, |
| 1676b099 |
int *bits, int BT_ZERO, int BT_UNSIGNED,
int BT_PAIR, int BT_ESC) |
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{ |
| 80d44277 |
const int q_idx = POW_SF2_ZERO - scale_idx + SCALE_ONE_POS - SCALE_DIV_512;
const float Q = ff_aac_pow2sf_tab [q_idx];
const float Q34 = ff_aac_pow34sf_tab[q_idx];
const float IQ = ff_aac_pow2sf_tab [POW_SF2_ZERO + scale_idx - SCALE_ONE_POS + SCALE_DIV_512]; |
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const float CLIPPED_ESCAPE = 165140.0f*IQ; |
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int i, j; |
| 78e65cd7 |
float cost = 0; |
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const int dim = BT_PAIR ? 2 : 4; |
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int resbits = 0; |
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const int range = aac_cb_range[cb]; |
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const int maxval = aac_cb_maxval[cb]; |
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int off; |
| 78e65cd7 |
|
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if (BT_ZERO) { |
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for (i = 0; i < size; i++) |
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cost += in[i]*in[i]; |
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if (bits)
*bits = 0; |
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return cost * lambda; |
| 78e65cd7 |
} |
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if (!scaled) {
abs_pow34_v(s->scoefs, in, size);
scaled = s->scoefs;
} |
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quantize_bands(s->qcoefs, in, scaled, size, Q34, !BT_UNSIGNED, maxval);
if (BT_UNSIGNED) { |
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off = 0;
} else {
off = maxval;
} |
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for (i = 0; i < size; i += dim) { |
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const float *vec; |
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int *quants = s->qcoefs + i;
int curidx = 0;
int curbits;
float rd = 0.0f;
for (j = 0; j < dim; j++) {
curidx *= range;
curidx += quants[j] + off;
} |
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curbits = ff_aac_spectral_bits[cb-1][curidx];
vec = &ff_aac_codebook_vectors[cb-1][curidx*dim];
if (BT_UNSIGNED) { |
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for (j = 0; j < dim; j++) {
float t = fabsf(in[i+j]); |
| 4afedfd8 |
float di; |
| 57cc1ad3 |
if (BT_ESC && vec[j] == 64.0f) { //FIXME: slow |
| 4afedfd8 |
if (t >= CLIPPED_ESCAPE) {
di = t - CLIPPED_ESCAPE;
curbits += 21; |
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} else { |
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int c = av_clip(quant(t, Q), 0, 8191);
di = t - c*cbrtf(c)*IQ;
curbits += av_log2(c)*2 - 4 + 1; |
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} |
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} else { |
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di = t - vec[j]*IQ; |
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} |
| 57cc1ad3 |
if (vec[j] != 0.0f) |
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curbits++;
rd += di*di;
}
} else { |
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for (j = 0; j < dim; j++) {
float di = in[i+j] - vec[j]*IQ; |
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rd += di*di; |
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} |
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} |
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cost += rd * lambda + curbits;
resbits += curbits; |
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if (cost >= uplim) |
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return uplim; |
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if (pb) { |
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put_bits(pb, ff_aac_spectral_bits[cb-1][curidx], ff_aac_spectral_codes[cb-1][curidx]);
if (BT_UNSIGNED)
for (j = 0; j < dim; j++)
if (ff_aac_codebook_vectors[cb-1][curidx*dim+j] != 0.0f)
put_bits(pb, 1, in[i+j] < 0.0f);
if (BT_ESC) {
for (j = 0; j < 2; j++) {
if (ff_aac_codebook_vectors[cb-1][curidx*2+j] == 64.0f) {
int coef = av_clip(quant(fabsf(in[i+j]), Q), 0, 8191);
int len = av_log2(coef);
put_bits(pb, len - 4 + 1, (1 << (len - 4 + 1)) - 2);
put_bits(pb, len, coef & ((1 << len) - 1));
} |
| 78e65cd7 |
}
}
}
} |
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if (bits)
*bits = resbits;
return cost;
} |
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#define QUANTIZE_AND_ENCODE_BAND_COST_FUNC(NAME, BT_ZERO, BT_UNSIGNED, BT_PAIR, BT_ESC) \
static float quantize_and_encode_band_cost_ ## NAME( \
struct AACEncContext *s, \
PutBitContext *pb, const float *in, \
const float *scaled, int size, int scale_idx, \
int cb, const float lambda, const float uplim, \
int *bits) { \
return quantize_and_encode_band_cost_template( \
s, pb, in, scaled, size, scale_idx, \
BT_ESC ? ESC_BT : cb, lambda, uplim, bits, \
BT_ZERO, BT_UNSIGNED, BT_PAIR, BT_ESC); \
}
QUANTIZE_AND_ENCODE_BAND_COST_FUNC(ZERO, 1, 0, 0, 0)
QUANTIZE_AND_ENCODE_BAND_COST_FUNC(SQUAD, 0, 0, 0, 0)
QUANTIZE_AND_ENCODE_BAND_COST_FUNC(UQUAD, 0, 1, 0, 0)
QUANTIZE_AND_ENCODE_BAND_COST_FUNC(SPAIR, 0, 0, 1, 0)
QUANTIZE_AND_ENCODE_BAND_COST_FUNC(UPAIR, 0, 1, 1, 0)
QUANTIZE_AND_ENCODE_BAND_COST_FUNC(ESC, 0, 1, 1, 1)
|
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static float (*const quantize_and_encode_band_cost_arr[])( |
| 1676b099 |
struct AACEncContext *s,
PutBitContext *pb, const float *in,
const float *scaled, int size, int scale_idx,
int cb, const float lambda, const float uplim,
int *bits) = {
quantize_and_encode_band_cost_ZERO,
quantize_and_encode_band_cost_SQUAD,
quantize_and_encode_band_cost_SQUAD,
quantize_and_encode_band_cost_UQUAD,
quantize_and_encode_band_cost_UQUAD,
quantize_and_encode_band_cost_SPAIR,
quantize_and_encode_band_cost_SPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_UPAIR,
quantize_and_encode_band_cost_ESC,
};
#define quantize_and_encode_band_cost( \
s, pb, in, scaled, size, scale_idx, cb, \
lambda, uplim, bits) \
quantize_and_encode_band_cost_arr[cb]( \
s, pb, in, scaled, size, scale_idx, cb, \
lambda, uplim, bits)
|
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static float quantize_band_cost(struct AACEncContext *s, const float *in,
const float *scaled, int size, int scale_idx,
int cb, const float lambda, const float uplim,
int *bits)
{
return quantize_and_encode_band_cost(s, NULL, in, scaled, size, scale_idx,
cb, lambda, uplim, bits);
}
static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
const float *in, int size, int scale_idx,
int cb, const float lambda)
{
quantize_and_encode_band_cost(s, pb, in, NULL, size, scale_idx, cb, lambda,
INFINITY, NULL); |
| 78e65cd7 |
}
|
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static float find_max_val(int group_len, int swb_size, const float *scaled) { |
| 05e659ef |
float maxval = 0.0f; |
| 0ecfa7b7 |
int w2, i; |
| 05e659ef |
for (w2 = 0; w2 < group_len; w2++) {
for (i = 0; i < swb_size; i++) {
maxval = FFMAX(maxval, scaled[w2*128+i]);
}
} |
| 0ecfa7b7 |
return maxval;
}
static int find_min_book(float maxval, int sf) { |
| d70fa4c4 |
float Q = ff_aac_pow2sf_tab[POW_SF2_ZERO - sf + SCALE_ONE_POS - SCALE_DIV_512]; |
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float Q34 = sqrtf(Q * sqrtf(Q));
int qmaxval, cb; |
| 05e659ef |
qmaxval = maxval * Q34 + 0.4054f;
if (qmaxval == 0) cb = 0;
else if (qmaxval == 1) cb = 1;
else if (qmaxval == 2) cb = 3;
else if (qmaxval <= 4) cb = 5;
else if (qmaxval <= 7) cb = 7;
else if (qmaxval <= 12) cb = 9;
else cb = 11;
return cb;
}
|
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/**
* structure used in optimal codebook search
*/
typedef struct BandCodingPath {
int prev_idx; ///< pointer to the previous path point
float cost; ///< path cost
int run;
} BandCodingPath;
/**
* Encode band info for single window group bands.
*/
static void encode_window_bands_info(AACEncContext *s, SingleChannelElement *sce,
int win, int group_len, const float lambda)
{
BandCodingPath path[120][12]; |
| e65ab9d9 |
int w, swb, cb, start, size; |
| 78e65cd7 |
int i, j; |
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const int max_sfb = sce->ics.max_sfb; |
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const int run_bits = sce->ics.num_windows == 1 ? 5 : 3; |
| 99d61d34 |
const int run_esc = (1 << run_bits) - 1; |
| 78e65cd7 |
int idx, ppos, count;
int stackrun[120], stackcb[120], stack_len;
float next_minrd = INFINITY;
int next_mincb = 0;
abs_pow34_v(s->scoefs, sce->coeffs, 1024);
start = win*128; |
| fd257dc4 |
for (cb = 0; cb < 12; cb++) { |
| 99d61d34 |
path[0][cb].cost = 0.0f; |
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path[0][cb].prev_idx = -1; |
| 99d61d34 |
path[0][cb].run = 0; |
| 78e65cd7 |
} |
| fd257dc4 |
for (swb = 0; swb < max_sfb; swb++) { |
| 78e65cd7 |
size = sce->ics.swb_sizes[swb]; |
| fd257dc4 |
if (sce->zeroes[win*16 + swb]) {
for (cb = 0; cb < 12; cb++) { |
| 78e65cd7 |
path[swb+1][cb].prev_idx = cb; |
| 99d61d34 |
path[swb+1][cb].cost = path[swb][cb].cost;
path[swb+1][cb].run = path[swb][cb].run + 1; |
| 78e65cd7 |
} |
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} else { |
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float minrd = next_minrd;
int mincb = next_mincb;
next_minrd = INFINITY;
next_mincb = 0; |
| fd257dc4 |
for (cb = 0; cb < 12; cb++) { |
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float cost_stay_here, cost_get_here;
float rd = 0.0f; |
| fd257dc4 |
for (w = 0; w < group_len; w++) { |
| 0bc01cc9 |
FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(win+w)*16+swb]; |
| 78e65cd7 |
rd += quantize_band_cost(s, sce->coeffs + start + w*128,
s->scoefs + start + w*128, size,
sce->sf_idx[(win+w)*16+swb], cb,
lambda / band->threshold, INFINITY, NULL);
}
cost_stay_here = path[swb][cb].cost + rd;
cost_get_here = minrd + rd + run_bits + 4; |
| fd257dc4 |
if ( run_value_bits[sce->ics.num_windows == 8][path[swb][cb].run] |
| 99d61d34 |
!= run_value_bits[sce->ics.num_windows == 8][path[swb][cb].run+1]) |
| 78e65cd7 |
cost_stay_here += run_bits;
if (cost_get_here < cost_stay_here) {
path[swb+1][cb].prev_idx = mincb;
path[swb+1][cb].cost = cost_get_here;
path[swb+1][cb].run = 1;
} else {
path[swb+1][cb].prev_idx = cb;
path[swb+1][cb].cost = cost_stay_here;
path[swb+1][cb].run = path[swb][cb].run + 1;
}
if (path[swb+1][cb].cost < next_minrd) {
next_minrd = path[swb+1][cb].cost;
next_mincb = cb;
}
}
}
start += sce->ics.swb_sizes[swb];
}
//convert resulting path from backward-linked list
stack_len = 0; |
| 99d61d34 |
idx = 0; |
| c8f47d8b |
for (cb = 1; cb < 12; cb++) |
| fd257dc4 |
if (path[max_sfb][cb].cost < path[max_sfb][idx].cost) |
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idx = cb;
ppos = max_sfb; |
| 99d61d34 |
while (ppos > 0) { |
| 78e65cd7 |
cb = idx;
stackrun[stack_len] = path[ppos][cb].run;
stackcb [stack_len] = cb;
idx = path[ppos-path[ppos][cb].run+1][cb].prev_idx;
ppos -= path[ppos][cb].run;
stack_len++;
}
//perform actual band info encoding
start = 0; |
| fd257dc4 |
for (i = stack_len - 1; i >= 0; i--) { |
| 78e65cd7 |
put_bits(&s->pb, 4, stackcb[i]);
count = stackrun[i];
memset(sce->zeroes + win*16 + start, !stackcb[i], count);
//XXX: memset when band_type is also uint8_t |
| fd257dc4 |
for (j = 0; j < count; j++) { |
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sce->band_type[win*16 + start] = stackcb[i];
start++;
} |
| 99d61d34 |
while (count >= run_esc) { |
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put_bits(&s->pb, run_bits, run_esc);
count -= run_esc;
}
put_bits(&s->pb, run_bits, count);
}
}
|
| 759510e6 |
static void codebook_trellis_rate(AACEncContext *s, SingleChannelElement *sce,
int win, int group_len, const float lambda)
{
BandCodingPath path[120][12]; |
| e65ab9d9 |
int w, swb, cb, start, size; |
| 759510e6 |
int i, j;
const int max_sfb = sce->ics.max_sfb;
const int run_bits = sce->ics.num_windows == 1 ? 5 : 3;
const int run_esc = (1 << run_bits) - 1;
int idx, ppos, count;
int stackrun[120], stackcb[120], stack_len; |
| 207bf44d |
float next_minbits = INFINITY; |
| 759510e6 |
int next_mincb = 0;
abs_pow34_v(s->scoefs, sce->coeffs, 1024);
start = win*128;
for (cb = 0; cb < 12; cb++) {
path[0][cb].cost = run_bits+4;
path[0][cb].prev_idx = -1;
path[0][cb].run = 0;
}
for (swb = 0; swb < max_sfb; swb++) {
size = sce->ics.swb_sizes[swb];
if (sce->zeroes[win*16 + swb]) { |
| 8dbaa5bd |
float cost_stay_here = path[swb][0].cost; |
| 207bf44d |
float cost_get_here = next_minbits + run_bits + 4; |
| 8dbaa5bd |
if ( run_value_bits[sce->ics.num_windows == 8][path[swb][0].run]
!= run_value_bits[sce->ics.num_windows == 8][path[swb][0].run+1])
cost_stay_here += run_bits;
if (cost_get_here < cost_stay_here) {
path[swb+1][0].prev_idx = next_mincb;
path[swb+1][0].cost = cost_get_here;
path[swb+1][0].run = 1;
} else {
path[swb+1][0].prev_idx = 0;
path[swb+1][0].cost = cost_stay_here;
path[swb+1][0].run = path[swb][0].run + 1;
} |
| 207bf44d |
next_minbits = path[swb+1][0].cost; |
| 8dbaa5bd |
next_mincb = 0;
for (cb = 1; cb < 12; cb++) {
path[swb+1][cb].cost = 61450;
path[swb+1][cb].prev_idx = -1;
path[swb+1][cb].run = 0; |
| 759510e6 |
}
} else { |
| 207bf44d |
float minbits = next_minbits; |
| 759510e6 |
int mincb = next_mincb;
int startcb = sce->band_type[win*16+swb]; |
| 207bf44d |
next_minbits = INFINITY; |
| 759510e6 |
next_mincb = 0;
for (cb = 0; cb < startcb; cb++) {
path[swb+1][cb].cost = 61450;
path[swb+1][cb].prev_idx = -1;
path[swb+1][cb].run = 0;
}
for (cb = startcb; cb < 12; cb++) {
float cost_stay_here, cost_get_here; |
| 207bf44d |
float bits = 0.0f; |
| 759510e6 |
for (w = 0; w < group_len; w++) { |
| 207bf44d |
bits += quantize_band_cost(s, sce->coeffs + start + w*128,
s->scoefs + start + w*128, size,
sce->sf_idx[(win+w)*16+swb], cb,
0, INFINITY, NULL); |
| 759510e6 |
} |
| 207bf44d |
cost_stay_here = path[swb][cb].cost + bits;
cost_get_here = minbits + bits + run_bits + 4; |
| 759510e6 |
if ( run_value_bits[sce->ics.num_windows == 8][path[swb][cb].run]
!= run_value_bits[sce->ics.num_windows == 8][path[swb][cb].run+1])
cost_stay_here += run_bits;
if (cost_get_here < cost_stay_here) {
path[swb+1][cb].prev_idx = mincb;
path[swb+1][cb].cost = cost_get_here;
path[swb+1][cb].run = 1;
} else {
path[swb+1][cb].prev_idx = cb;
path[swb+1][cb].cost = cost_stay_here;
path[swb+1][cb].run = path[swb][cb].run + 1;
} |
| 207bf44d |
if (path[swb+1][cb].cost < next_minbits) {
next_minbits = path[swb+1][cb].cost; |
| 759510e6 |
next_mincb = cb;
}
}
}
start += sce->ics.swb_sizes[swb];
}
//convert resulting path from backward-linked list
stack_len = 0;
idx = 0;
for (cb = 1; cb < 12; cb++)
if (path[max_sfb][cb].cost < path[max_sfb][idx].cost)
idx = cb;
ppos = max_sfb;
while (ppos > 0) { |
| 688cb712 |
av_assert1(idx >= 0); |
| 759510e6 |
cb = idx;
stackrun[stack_len] = path[ppos][cb].run;
stackcb [stack_len] = cb;
idx = path[ppos-path[ppos][cb].run+1][cb].prev_idx;
ppos -= path[ppos][cb].run;
stack_len++;
}
//perform actual band info encoding
start = 0;
for (i = stack_len - 1; i >= 0; i--) {
put_bits(&s->pb, 4, stackcb[i]);
count = stackrun[i];
memset(sce->zeroes + win*16 + start, !stackcb[i], count);
//XXX: memset when band_type is also uint8_t
for (j = 0; j < count; j++) {
sce->band_type[win*16 + start] = stackcb[i];
start++;
}
while (count >= run_esc) {
put_bits(&s->pb, run_bits, run_esc);
count -= run_esc;
}
put_bits(&s->pb, run_bits, count);
}
}
|
| 04d72abf |
/** Return the minimum scalefactor where the quantized coef does not clip. */
static av_always_inline uint8_t coef2minsf(float coef) { |
| 51ffd3a6 |
return av_clip_uint8(log2f(coef)*4 - 69 + SCALE_ONE_POS - SCALE_DIV_512); |
| 04d72abf |
}
/** Return the maximum scalefactor where the quantized coef is not zero. */
static av_always_inline uint8_t coef2maxsf(float coef) { |
| 51ffd3a6 |
return av_clip_uint8(log2f(coef)*4 + 6 + SCALE_ONE_POS - SCALE_DIV_512); |
| 04d72abf |
}
|
| 78e65cd7 |
typedef struct TrellisPath {
float cost;
int prev;
} TrellisPath;
|
| f5e82fec |
#define TRELLIS_STAGES 121 |
| 144c5e3d |
#define TRELLIS_STATES (SCALE_MAX_DIFF+1) |
| f5e82fec |
|
| 78e65cd7 |
static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s, |
| 99d61d34 |
SingleChannelElement *sce,
const float lambda) |
| 78e65cd7 |
{
int q, w, w2, g, start = 0; |
| 9072c29e |
int i, j; |
| 78e65cd7 |
int idx; |
| f5e82fec |
TrellisPath paths[TRELLIS_STAGES][TRELLIS_STATES];
int bandaddr[TRELLIS_STAGES]; |
| 78e65cd7 |
int minq;
float mincost; |
| 144c5e3d |
float q0f = FLT_MAX, q1f = 0.0f, qnrgf = 0.0f;
int q0, q1, qcnt = 0;
for (i = 0; i < 1024; i++) {
float t = fabsf(sce->coeffs[i]);
if (t > 0.0f) {
q0f = FFMIN(q0f, t);
q1f = FFMAX(q1f, t);
qnrgf += t*t;
qcnt++;
}
}
if (!qcnt) {
memset(sce->sf_idx, 0, sizeof(sce->sf_idx));
memset(sce->zeroes, 1, sizeof(sce->zeroes));
return;
}
//minimum scalefactor index is when minimum nonzero coefficient after quantizing is not clipped |
| 04d72abf |
q0 = coef2minsf(q0f); |
| 144c5e3d |
//maximum scalefactor index is when maximum coefficient after quantizing is still not zero |
| 04d72abf |
q1 = coef2maxsf(q1f); |
| 144c5e3d |
if (q1 - q0 > 60) {
int q0low = q0;
int q1high = q1;
//minimum scalefactor index is when maximum nonzero coefficient after quantizing is not clipped |
| 51ffd3a6 |
int qnrg = av_clip_uint8(log2f(sqrtf(qnrgf/qcnt))*4 - 31 + SCALE_ONE_POS - SCALE_DIV_512); |
| 144c5e3d |
q1 = qnrg + 30;
q0 = qnrg - 30;
if (q0 < q0low) {
q1 += q0low - q0;
q0 = q0low;
} else if (q1 > q1high) {
q0 -= q1 - q1high;
q1 = q1high;
}
} |
| 78e65cd7 |
|
| f5e82fec |
for (i = 0; i < TRELLIS_STATES; i++) { |
| 9072c29e |
paths[0][i].cost = 0.0f;
paths[0][i].prev = -1; |
| 78e65cd7 |
} |
| f5e82fec |
for (j = 1; j < TRELLIS_STAGES; j++) {
for (i = 0; i < TRELLIS_STATES; i++) { |
| 9072c29e |
paths[j][i].cost = INFINITY;
paths[j][i].prev = -2;
} |
| 78e65cd7 |
} |
| 9072c29e |
idx = 1; |
| 78e65cd7 |
abs_pow34_v(s->scoefs, sce->coeffs, 1024); |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 78e65cd7 |
start = w*128; |
| fd257dc4 |
for (g = 0; g < sce->ics.num_swb; g++) { |
| 78e65cd7 |
const float *coefs = sce->coeffs + start;
float qmin, qmax;
int nz = 0;
|
| 9072c29e |
bandaddr[idx] = w * 16 + g; |
| 78e65cd7 |
qmin = INT_MAX;
qmax = 0.0f; |
| fd257dc4 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { |
| 0bc01cc9 |
FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g]; |
| fd257dc4 |
if (band->energy <= band->threshold || band->threshold == 0.0f) { |
| 78e65cd7 |
sce->zeroes[(w+w2)*16+g] = 1;
continue;
}
sce->zeroes[(w+w2)*16+g] = 0;
nz = 1; |
| fd257dc4 |
for (i = 0; i < sce->ics.swb_sizes[g]; i++) { |
| 78e65cd7 |
float t = fabsf(coefs[w2*128+i]); |
| c8f47d8b |
if (t > 0.0f) |
| 988c1705 |
qmin = FFMIN(qmin, t);
qmax = FFMAX(qmax, t); |
| 78e65cd7 |
}
} |
| fd257dc4 |
if (nz) { |
| 78e65cd7 |
int minscale, maxscale;
float minrd = INFINITY; |
| 9069b7d3 |
float maxval; |
| 78e65cd7 |
//minimum scalefactor index is when minimum nonzero coefficient after quantizing is not clipped |
| 04d72abf |
minscale = coef2minsf(qmin); |
| 78e65cd7 |
//maximum scalefactor index is when maximum coefficient after quantizing is still not zero |
| 04d72abf |
maxscale = coef2maxsf(qmax); |
| 144c5e3d |
minscale = av_clip(minscale - q0, 0, TRELLIS_STATES - 1);
maxscale = av_clip(maxscale - q0, 0, TRELLIS_STATES); |
| 9069b7d3 |
maxval = find_max_val(sce->ics.group_len[w], sce->ics.swb_sizes[g], s->scoefs+start); |
| fd257dc4 |
for (q = minscale; q < maxscale; q++) { |
| acc9f51f |
float dist = 0; |
| 0ecfa7b7 |
int cb = find_min_book(maxval, sce->sf_idx[w*16+g]); |
| fd257dc4 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { |
| 0bc01cc9 |
FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g]; |
| acc9f51f |
dist += quantize_band_cost(s, coefs + w2*128, s->scoefs + start + w2*128, sce->ics.swb_sizes[g], |
| 911fbc45 |
q + q0, cb, lambda / band->threshold, INFINITY, NULL); |
| 78e65cd7 |
} |
| 988c1705 |
minrd = FFMIN(minrd, dist); |
| 78e65cd7 |
|
| 144c5e3d |
for (i = 0; i < q1 - q0; i++) { |
| 78e65cd7 |
float cost; |
| 9072c29e |
cost = paths[idx - 1][i].cost + dist |
| 78e65cd7 |
+ ff_aac_scalefactor_bits[q - i + SCALE_DIFF_ZERO]; |
| 144c5e3d |
if (cost < paths[idx][q].cost) { |
| 9072c29e |
paths[idx][q].cost = cost;
paths[idx][q].prev = i; |
| 78e65cd7 |
}
}
} |
| fd257dc4 |
} else { |
| 144c5e3d |
for (q = 0; q < q1 - q0; q++) { |
| 911fbc45 |
paths[idx][q].cost = paths[idx - 1][q].cost + 1;
paths[idx][q].prev = q; |
| 78e65cd7 |
}
}
sce->zeroes[w*16+g] = !nz;
start += sce->ics.swb_sizes[g]; |
| 9072c29e |
idx++; |
| 78e65cd7 |
}
} |
| 9072c29e |
idx--;
mincost = paths[idx][0].cost;
minq = 0; |
| f5e82fec |
for (i = 1; i < TRELLIS_STATES; i++) { |
| 9072c29e |
if (paths[idx][i].cost < mincost) {
mincost = paths[idx][i].cost;
minq = i; |
| 78e65cd7 |
}
} |
| 9072c29e |
while (idx) { |
| 144c5e3d |
sce->sf_idx[bandaddr[idx]] = minq + q0; |
| 9072c29e |
minq = paths[idx][minq].prev;
idx--; |
| 78e65cd7 |
}
//set the same quantizers inside window groups |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w])
for (g = 0; g < sce->ics.num_swb; g++)
for (w2 = 1; w2 < sce->ics.group_len[w]; w2++) |
| 78e65cd7 |
sce->sf_idx[(w+w2)*16+g] = sce->sf_idx[w*16+g];
}
/**
* two-loop quantizers search taken from ISO 13818-7 Appendix C
*/ |
| 99d61d34 |
static void search_for_quantizers_twoloop(AVCodecContext *avctx,
AACEncContext *s,
SingleChannelElement *sce,
const float lambda) |
| 78e65cd7 |
{
int start = 0, i, w, w2, g; |
| 1ef82cc6 |
int destbits = avctx->bit_rate * 1024.0 / avctx->sample_rate / avctx->channels * (lambda / 120.f); |
| a92be9b8 |
float dists[128] = { 0 }, uplims[128]; |
| 63e1278d |
float maxvals[128]; |
| 78e65cd7 |
int fflag, minscaler; |
| 99d61d34 |
int its = 0; |
| 78e65cd7 |
int allz = 0;
float minthr = INFINITY;
|
| ecd7455e |
// for values above this the decoder might end up in an endless loop
// due to always having more bits than what can be encoded.
destbits = FFMIN(destbits, 5800); |
| 78e65cd7 |
//XXX: some heuristic to determine initial quantizers will reduce search time
//determine zero bands and upper limits |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
for (g = 0; g < sce->ics.num_swb; g++) { |
| 78e65cd7 |
int nz = 0;
float uplim = 0.0f; |
| fd257dc4 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { |
| 0bc01cc9 |
FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g]; |
| 78e65cd7 |
uplim += band->threshold; |
| fd257dc4 |
if (band->energy <= band->threshold || band->threshold == 0.0f) { |
| 78e65cd7 |
sce->zeroes[(w+w2)*16+g] = 1;
continue;
}
nz = 1;
}
uplims[w*16+g] = uplim *512;
sce->zeroes[w*16+g] = !nz; |
| fd257dc4 |
if (nz) |
| 988c1705 |
minthr = FFMIN(minthr, uplim); |
| f578854e |
allz |= nz; |
| 78e65cd7 |
}
} |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
for (g = 0; g < sce->ics.num_swb; g++) {
if (sce->zeroes[w*16+g]) { |
| 78e65cd7 |
sce->sf_idx[w*16+g] = SCALE_ONE_POS;
continue;
} |
| 51ffd3a6 |
sce->sf_idx[w*16+g] = SCALE_ONE_POS + FFMIN(log2f(uplims[w*16+g]/minthr)*4,59); |
| 78e65cd7 |
}
}
|
| fd257dc4 |
if (!allz) |
| 78e65cd7 |
return;
abs_pow34_v(s->scoefs, sce->coeffs, 1024); |
| 63e1278d |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
start = w*128;
for (g = 0; g < sce->ics.num_swb; g++) {
const float *scaled = s->scoefs + start;
maxvals[w*16+g] = find_max_val(sce->ics.group_len[w], sce->ics.swb_sizes[g], scaled);
start += sce->ics.swb_sizes[g];
}
}
|
| 78e65cd7 |
//perform two-loop search
//outer loop - improve quality |
| 99d61d34 |
do { |
| 78e65cd7 |
int tbits, qstep;
minscaler = sce->sf_idx[0];
//inner loop - quantize spectrum to fit into given number of bits
qstep = its ? 1 : 32; |
| 99d61d34 |
do { |
| 78e65cd7 |
int prev = -1;
tbits = 0;
fflag = 0; |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 78e65cd7 |
start = w*128; |
| fd257dc4 |
for (g = 0; g < sce->ics.num_swb; g++) { |
| 78e65cd7 |
const float *coefs = sce->coeffs + start;
const float *scaled = s->scoefs + start;
int bits = 0;
int cb; |
| 04d6a54e |
float dist = 0.0f; |
| 78e65cd7 |
|
| a62d6cfe |
if (sce->zeroes[w*16+g] || sce->sf_idx[w*16+g] >= 218) {
start += sce->ics.swb_sizes[g]; |
| 78e65cd7 |
continue; |
| a62d6cfe |
} |
| 78e65cd7 |
minscaler = FFMIN(minscaler, sce->sf_idx[w*16+g]); |
| 63e1278d |
cb = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); |
| 911fbc45 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) {
int b;
dist += quantize_band_cost(s, coefs + w2*128,
scaled + w2*128,
sce->ics.swb_sizes[g],
sce->sf_idx[w*16+g],
cb, |
| c91dce99 |
1.0f, |
| 911fbc45 |
INFINITY,
&b);
bits += b;
} |
| c91dce99 |
dists[w*16+g] = dist - bits; |
| fd257dc4 |
if (prev != -1) { |
| 78e65cd7 |
bits += ff_aac_scalefactor_bits[sce->sf_idx[w*16+g] - prev + SCALE_DIFF_ZERO];
}
tbits += bits;
start += sce->ics.swb_sizes[g];
prev = sce->sf_idx[w*16+g];
}
} |
| fd257dc4 |
if (tbits > destbits) { |
| c8f47d8b |
for (i = 0; i < 128; i++)
if (sce->sf_idx[i] < 218 - qstep) |
| 78e65cd7 |
sce->sf_idx[i] += qstep; |
| fd257dc4 |
} else { |
| c8f47d8b |
for (i = 0; i < 128; i++)
if (sce->sf_idx[i] > 60 - qstep) |
| 78e65cd7 |
sce->sf_idx[i] -= qstep;
}
qstep >>= 1; |
| c226fc5b |
if (!qstep && tbits > destbits*1.02 && sce->sf_idx[0] < 217) |
| 78e65cd7 |
qstep = 1; |
| 99d61d34 |
} while (qstep); |
| 78e65cd7 |
fflag = 0;
minscaler = av_clip(minscaler, 60, 255 - SCALE_MAX_DIFF); |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
for (g = 0; g < sce->ics.num_swb; g++) { |
| 78e65cd7 |
int prevsc = sce->sf_idx[w*16+g]; |
| fe461767 |
if (dists[w*16+g] > uplims[w*16+g] && sce->sf_idx[w*16+g] > 60) { |
| 63e1278d |
if (find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]-1)) |
| 00f0b4b9 |
sce->sf_idx[w*16+g]--; |
| fe461767 |
else //Try to make sure there is some energy in every band
sce->sf_idx[w*16+g]-=2;
} |
| 78e65cd7 |
sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], minscaler, minscaler + SCALE_MAX_DIFF);
sce->sf_idx[w*16+g] = FFMIN(sce->sf_idx[w*16+g], 219); |
| fd257dc4 |
if (sce->sf_idx[w*16+g] != prevsc) |
| 78e65cd7 |
fflag = 1; |
| 63e1278d |
sce->band_type[w*16+g] = find_min_book(maxvals[w*16+g], sce->sf_idx[w*16+g]); |
| 78e65cd7 |
}
}
its++; |
| 99d61d34 |
} while (fflag && its < 10); |
| 78e65cd7 |
}
static void search_for_quantizers_faac(AVCodecContext *avctx, AACEncContext *s, |
| 99d61d34 |
SingleChannelElement *sce,
const float lambda) |
| 78e65cd7 |
{
int start = 0, i, w, w2, g;
float uplim[128], maxq[128];
int minq, maxsf;
float distfact = ((sce->ics.num_windows > 1) ? 85.80 : 147.84) / lambda;
int last = 0, lastband = 0, curband = 0;
float avg_energy = 0.0; |
| fd257dc4 |
if (sce->ics.num_windows == 1) { |
| 78e65cd7 |
start = 0; |
| fd257dc4 |
for (i = 0; i < 1024; i++) {
if (i - start >= sce->ics.swb_sizes[curband]) { |
| 78e65cd7 |
start += sce->ics.swb_sizes[curband];
curband++;
} |
| fd257dc4 |
if (sce->coeffs[i]) { |
| 78e65cd7 |
avg_energy += sce->coeffs[i] * sce->coeffs[i];
last = i;
lastband = curband;
}
} |
| fd257dc4 |
} else {
for (w = 0; w < 8; w++) { |
| 78e65cd7 |
const float *coeffs = sce->coeffs + w*128; |
| 33775c35 |
curband = start = 0; |
| fd257dc4 |
for (i = 0; i < 128; i++) {
if (i - start >= sce->ics.swb_sizes[curband]) { |
| 78e65cd7 |
start += sce->ics.swb_sizes[curband];
curband++;
} |
| fd257dc4 |
if (coeffs[i]) { |
| 78e65cd7 |
avg_energy += coeffs[i] * coeffs[i];
last = FFMAX(last, i);
lastband = FFMAX(lastband, curband);
}
}
}
}
last++;
avg_energy /= last; |
| fd257dc4 |
if (avg_energy == 0.0f) {
for (i = 0; i < FF_ARRAY_ELEMS(sce->sf_idx); i++) |
| 78e65cd7 |
sce->sf_idx[i] = SCALE_ONE_POS;
return;
} |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 78e65cd7 |
start = w*128; |
| fd257dc4 |
for (g = 0; g < sce->ics.num_swb; g++) { |
| 99d61d34 |
float *coefs = sce->coeffs + start; |
| 78e65cd7 |
const int size = sce->ics.swb_sizes[g];
int start2 = start, end2 = start + size, peakpos = start;
float maxval = -1, thr = 0.0f, t;
maxq[w*16+g] = 0.0f; |
| fd257dc4 |
if (g > lastband) { |
| 78e65cd7 |
maxq[w*16+g] = 0.0f;
start += size; |
| fd257dc4 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) |
| 78e65cd7 |
memset(coefs + w2*128, 0, sizeof(coefs[0])*size);
continue;
} |
| fd257dc4 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) {
for (i = 0; i < size; i++) { |
| 78e65cd7 |
float t = coefs[w2*128+i]*coefs[w2*128+i]; |
| 988c1705 |
maxq[w*16+g] = FFMAX(maxq[w*16+g], fabsf(coefs[w2*128 + i])); |
| 78e65cd7 |
thr += t; |
| fd257dc4 |
if (sce->ics.num_windows == 1 && maxval < t) { |
| 99d61d34 |
maxval = t; |
| 78e65cd7 |
peakpos = start+i;
}
}
} |
| fd257dc4 |
if (sce->ics.num_windows == 1) { |
| 78e65cd7 |
start2 = FFMAX(peakpos - 2, start2);
end2 = FFMIN(peakpos + 3, end2); |
| fd257dc4 |
} else { |
| 78e65cd7 |
start2 -= start;
end2 -= start;
}
start += size;
thr = pow(thr / (avg_energy * (end2 - start2)), 0.3 + 0.1*(lastband - g) / lastband); |
| 99d61d34 |
t = 1.0 - (1.0 * start2 / last); |
| 78e65cd7 |
uplim[w*16+g] = distfact / (1.4 * thr + t*t*t + 0.075);
}
}
memset(sce->sf_idx, 0, sizeof(sce->sf_idx));
abs_pow34_v(s->scoefs, sce->coeffs, 1024); |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 78e65cd7 |
start = w*128; |
| fd257dc4 |
for (g = 0; g < sce->ics.num_swb; g++) { |
| 99d61d34 |
const float *coefs = sce->coeffs + start;
const float *scaled = s->scoefs + start;
const int size = sce->ics.swb_sizes[g]; |
| 78e65cd7 |
int scf, prev_scf, step; |
| 32fa7725 |
int min_scf = -1, max_scf = 256; |
| 78e65cd7 |
float curdiff; |
| fd257dc4 |
if (maxq[w*16+g] < 21.544) { |
| 78e65cd7 |
sce->zeroes[w*16+g] = 1;
start += size;
continue;
}
sce->zeroes[w*16+g] = 0; |
| 51ffd3a6 |
scf = prev_scf = av_clip(SCALE_ONE_POS - SCALE_DIV_512 - log2f(1/maxq[w*16+g])*16/3, 60, 218); |
| 78e65cd7 |
step = 16; |
| fd257dc4 |
for (;;) { |
| 78e65cd7 |
float dist = 0.0f;
int quant_max;
|
| fd257dc4 |
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { |
| 78e65cd7 |
int b;
dist += quantize_band_cost(s, coefs + w2*128,
scaled + w2*128,
sce->ics.swb_sizes[g],
scf,
ESC_BT, |
| 7a4eebcd |
lambda, |
| 78e65cd7 |
INFINITY,
&b);
dist -= b;
} |
| 7a4eebcd |
dist *= 1.0f / 512.0f / lambda; |
| d70fa4c4 |
quant_max = quant(maxq[w*16+g], ff_aac_pow2sf_tab[POW_SF2_ZERO - scf + SCALE_ONE_POS - SCALE_DIV_512]); |
| fd257dc4 |
if (quant_max >= 8191) { // too much, return to the previous quantizer |
| 78e65cd7 |
sce->sf_idx[w*16+g] = prev_scf;
break;
}
prev_scf = scf;
curdiff = fabsf(dist - uplim[w*16+g]); |
| 32fa7725 |
if (curdiff <= 1.0f) |
| 78e65cd7 |
step = 0;
else |
| 51ffd3a6 |
step = log2f(curdiff); |
| fd257dc4 |
if (dist > uplim[w*16+g]) |
| 78e65cd7 |
step = -step; |
| 32fa7725 |
scf += step; |
| 46174079 |
scf = av_clip_uint8(scf); |
| 32fa7725 |
step = scf - prev_scf; |
| fd257dc4 |
if (FFABS(step) <= 1 || (step > 0 && scf >= max_scf) || (step < 0 && scf <= min_scf)) { |
| 32fa7725 |
sce->sf_idx[w*16+g] = av_clip(scf, min_scf, max_scf); |
| 78e65cd7 |
break;
} |
| fd257dc4 |
if (step > 0) |
| 32fa7725 |
min_scf = prev_scf; |
| 78e65cd7 |
else |
| 32fa7725 |
max_scf = prev_scf; |
| 78e65cd7 |
}
start += size;
}
}
minq = sce->sf_idx[0] ? sce->sf_idx[0] : INT_MAX; |
| fd257dc4 |
for (i = 1; i < 128; i++) {
if (!sce->sf_idx[i]) |
| 78e65cd7 |
sce->sf_idx[i] = sce->sf_idx[i-1];
else
minq = FFMIN(minq, sce->sf_idx[i]);
} |
| c8f47d8b |
if (minq == INT_MAX)
minq = 0; |
| 78e65cd7 |
minq = FFMIN(minq, SCALE_MAX_POS);
maxsf = FFMIN(minq + SCALE_MAX_DIFF, SCALE_MAX_POS); |
| fd257dc4 |
for (i = 126; i >= 0; i--) {
if (!sce->sf_idx[i]) |
| 78e65cd7 |
sce->sf_idx[i] = sce->sf_idx[i+1];
sce->sf_idx[i] = av_clip(sce->sf_idx[i], minq, maxsf);
}
}
static void search_for_quantizers_fast(AVCodecContext *avctx, AACEncContext *s, |
| 99d61d34 |
SingleChannelElement *sce,
const float lambda) |
| 78e65cd7 |
{ |
| e65ab9d9 |
int i, w, w2, g; |
| 78e65cd7 |
int minq = 255;
memset(sce->sf_idx, 0, sizeof(sce->sf_idx)); |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
for (g = 0; g < sce->ics.num_swb; g++) {
for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) { |
| 0bc01cc9 |
FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g]; |
| fd257dc4 |
if (band->energy <= band->threshold) { |
| 78e65cd7 |
sce->sf_idx[(w+w2)*16+g] = 218;
sce->zeroes[(w+w2)*16+g] = 1; |
| fd257dc4 |
} else { |
| 51ffd3a6 |
sce->sf_idx[(w+w2)*16+g] = av_clip(SCALE_ONE_POS - SCALE_DIV_512 + log2f(band->threshold), 80, 218); |
| 78e65cd7 |
sce->zeroes[(w+w2)*16+g] = 0;
}
minq = FFMIN(minq, sce->sf_idx[(w+w2)*16+g]);
}
}
} |
| fd257dc4 |
for (i = 0; i < 128; i++) { |
| c8f47d8b |
sce->sf_idx[i] = 140;
//av_clip(sce->sf_idx[i], minq, minq + SCALE_MAX_DIFF - 1); |
| 78e65cd7 |
}
//set the same quantizers inside window groups |
| fd257dc4 |
for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w])
for (g = 0; g < sce->ics.num_swb; g++)
for (w2 = 1; w2 < sce->ics.group_len[w]; w2++) |
| 78e65cd7 |
sce->sf_idx[(w+w2)*16+g] = sce->sf_idx[w*16+g];
}
|
| 99d61d34 |
static void search_for_ms(AACEncContext *s, ChannelElement *cpe,
const float lambda) |
| 78e65cd7 |
{
int start = 0, i, w, w2, g;
float M[128], S[128];
float *L34 = s->scoefs, *R34 = s->scoefs + 128, *M34 = s->scoefs + 128*2, *S34 = s->scoefs + 128*3;
SingleChannelElement *sce0 = &cpe->ch[0];
SingleChannelElement *sce1 = &cpe->ch[1]; |
| fd257dc4 |
if (!cpe->common_window) |
| 78e65cd7 |
return; |
| fd257dc4 |
for (w = 0; w < sce0->ics.num_windows; w += sce0->ics.group_len[w]) {
for (g = 0; g < sce0->ics.num_swb; g++) {
if (!cpe->ch[0].zeroes[w*16+g] && !cpe->ch[1].zeroes[w*16+g]) { |
| 78e65cd7 |
float dist1 = 0.0f, dist2 = 0.0f; |
| fd257dc4 |
for (w2 = 0; w2 < sce0->ics.group_len[w]; w2++) { |
| 0bc01cc9 |
FFPsyBand *band0 = &s->psy.ch[s->cur_channel+0].psy_bands[(w+w2)*16+g];
FFPsyBand *band1 = &s->psy.ch[s->cur_channel+1].psy_bands[(w+w2)*16+g]; |
| 988c1705 |
float minthr = FFMIN(band0->threshold, band1->threshold);
float maxthr = FFMAX(band0->threshold, band1->threshold); |
| fd257dc4 |
for (i = 0; i < sce0->ics.swb_sizes[g]; i++) { |
| 78e65cd7 |
M[i] = (sce0->coeffs[start+w2*128+i] |
| 99d61d34 |
+ sce1->coeffs[start+w2*128+i]) * 0.5; |
| 92efa2bd |
S[i] = M[i] |
| 78e65cd7 |
- sce1->coeffs[start+w2*128+i];
}
abs_pow34_v(L34, sce0->coeffs+start+w2*128, sce0->ics.swb_sizes[g]);
abs_pow34_v(R34, sce1->coeffs+start+w2*128, sce0->ics.swb_sizes[g]);
abs_pow34_v(M34, M, sce0->ics.swb_sizes[g]);
abs_pow34_v(S34, S, sce0->ics.swb_sizes[g]);
dist1 += quantize_band_cost(s, sce0->coeffs + start + w2*128,
L34,
sce0->ics.swb_sizes[g],
sce0->sf_idx[(w+w2)*16+g],
sce0->band_type[(w+w2)*16+g],
lambda / band0->threshold, INFINITY, NULL);
dist1 += quantize_band_cost(s, sce1->coeffs + start + w2*128,
R34,
sce1->ics.swb_sizes[g],
sce1->sf_idx[(w+w2)*16+g],
sce1->band_type[(w+w2)*16+g],
lambda / band1->threshold, INFINITY, NULL);
dist2 += quantize_band_cost(s, M,
M34,
sce0->ics.swb_sizes[g],
sce0->sf_idx[(w+w2)*16+g],
sce0->band_type[(w+w2)*16+g],
lambda / maxthr, INFINITY, NULL);
dist2 += quantize_band_cost(s, S,
S34,
sce1->ics.swb_sizes[g],
sce1->sf_idx[(w+w2)*16+g],
sce1->band_type[(w+w2)*16+g],
lambda / minthr, INFINITY, NULL);
}
cpe->ms_mask[w*16+g] = dist2 < dist1;
}
start += sce0->ics.swb_sizes[g];
}
}
}
|
| 1b122387 |
AACCoefficientsEncoder ff_aac_coders[AAC_CODER_NB] = { |
| 4bd910d8 |
[AAC_CODER_FAAC] = { |
| 78e65cd7 |
search_for_quantizers_faac, |
| 7a4eebcd |
encode_window_bands_info, |
| 78e65cd7 |
quantize_and_encode_band, |
| dd0e43e4 |
search_for_ms, |
| 78e65cd7 |
}, |
| 4bd910d8 |
[AAC_CODER_ANMR] = { |
| 78e65cd7 |
search_for_quantizers_anmr,
encode_window_bands_info,
quantize_and_encode_band, |
| dd0e43e4 |
search_for_ms, |
| 78e65cd7 |
}, |
| 4bd910d8 |
[AAC_CODER_TWOLOOP] = { |
| 78e65cd7 |
search_for_quantizers_twoloop, |
| 759510e6 |
codebook_trellis_rate, |
| 78e65cd7 |
quantize_and_encode_band, |
| dd0e43e4 |
search_for_ms, |
| 78e65cd7 |
}, |
| 4bd910d8 |
[AAC_CODER_FAST] = { |
| 78e65cd7 |
search_for_quantizers_fast,
encode_window_bands_info,
quantize_and_encode_band, |
| dd0e43e4 |
search_for_ms, |
| 78e65cd7 |
},
}; |