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Looks like the bit allocation code is mostly working. Just need to actually

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use it now.
This commit is contained in:
Jean-Marc Valin 2008-01-17 10:58:38 +11:00
parent c6b4390f6a
commit f51ca493fb
4 changed files with 146 additions and 123 deletions
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21
libcelt/modes.c
View file

@ -78,6 +78,12 @@ const int qpulses4s[NBANDS] ={38,31,25,21,18,16, 14, 12, 14, 12,14,15, 14, 15, 1
const int pbank1[PBANDS128+2] = {0, 2, 4, 6, 8, 12, 20, 28, PITCH_END128, 128};
//const int pbank1[PBANDS128+2] = {0, 4, 8, 12, 20, PITCH_END128, 128};
int bitalloc0[NBANDS*5] = { 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0,
8, 7, 7, 6, 6, 6, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
16, 15, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
26, 25, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
};
#define NBANDS256 15
#define PBANDS256 8
@ -103,6 +109,9 @@ const CELTMode mode0 = {
0.8, /**< ePredCoef */
means18, /**< eMeans */
decay18, /**< eDecay */
5, /**< nbAllocVectors */
bitalloc0, /**< allocVectors */
};
@ -124,6 +133,9 @@ const CELTMode mode1 = {
0.7, /**< ePredCoef */
means, /**< eMeans */
decay, /**< eDecay */
5, /**< nbAllocVectors */
bitalloc0, /**< allocVectors */
};
/* Approx 58 kbps @ 44.1 kHz */
@ -144,6 +156,9 @@ const CELTMode mode2 = {
0.8, /**< ePredCoef */
means18, /**< eMeans */
decay18, /**< eDecay */
5, /**< nbAllocVectors */
bitalloc0, /**< allocVectors */
};
const CELTMode mode3 = {
@ -163,6 +178,9 @@ const CELTMode mode3 = {
0.7, /**< ePredCoef */
means, /**< eMeans */
decay, /**< eDecay */
5, /**< nbAllocVectors */
bitalloc0, /**< allocVectors */
};
/* Stereo mode around 120 kbps */
@ -183,6 +201,9 @@ const CELTMode mode4 = {
0.8, /**< ePredCoef */
means18, /**< eMeans */
decay18, /**< eDecay */
5, /**< nbAllocVectors */
bitalloc0, /**< allocVectors */
};
const CELTMode const *celt_mode0 = &mode0;

3
libcelt/modes.h
View file

@ -51,6 +51,9 @@ struct CELTMode {
float ePredCoef;
const float *eMeans;
const int *eDecay;
int nbAllocVectors;
const int *allocVectors;
};
#endif

185
libcelt/rate.c
View file

@ -36,10 +36,11 @@
#include "os_support.h"
#include "entcode.h"
#include "rate.h"
#define BITRES 4
#define BITROUND 8
#define BITOVERFLOW 1000
#define BITOVERFLOW 10000
#define MAX_PULSES 64
@ -91,42 +92,16 @@ int log2_frac64(ec_uint64 val, int frac)
return L;
}
int bits2pulses0(int bits, int N)
{
int i, b, prev;
/* FIXME: This is terribly inefficient. Do a bisection instead
but be careful about overflows */
prev = 0;
i=1;
b = log2_frac64(ncwrs64(N, i),0);
while (b<bits)
{
prev=b;
i++;
b = log2_frac64(ncwrs64(N, i),0);
}
if (bits-prev < b-bits)
i--;
return i;
}
struct alloc_data {
int len;
const int *bands;
int **bits;
int **rev_bits;
};
void alloc_init(struct alloc_data *alloc, const CELTMode *m)
{
int i, prevN, BC;
const int *eBands = m->eBands;
alloc->mode = m;
alloc->len = m->nbEBands;
alloc->bands = m->eBands;
alloc->bits = celt_alloc(m->nbEBands*sizeof(int*));
alloc->rev_bits = celt_alloc(m->nbEBands*sizeof(int*));
BC = m->nbMdctBlocks*m->nbChannels;
prevN = -1;
@ -136,12 +111,10 @@ void alloc_init(struct alloc_data *alloc, const CELTMode *m)
if (N == prevN)
{
alloc->bits[i] = alloc->bits[i-1];
alloc->rev_bits[i] = alloc->rev_bits[i-1];
} else {
int j;
/* FIXME: We could save memory here */
alloc->bits[i] = celt_alloc(MAX_PULSES*sizeof(int));
alloc->rev_bits[i] = celt_alloc(MAX_PULSES*sizeof(int));
for (j=0;j<MAX_PULSES;j++)
{
alloc->bits[i][j] = log2_frac64(ncwrs64(N, j),BITRES);
@ -151,8 +124,6 @@ void alloc_init(struct alloc_data *alloc, const CELTMode *m)
}
for (;j<MAX_PULSES;j++)
alloc->bits[i][j] = BITOVERFLOW;
for (j=0;j<32;j++)
alloc->rev_bits[i][j] = bits2pulses0(j, N);
prevN = N;
}
}
@ -168,41 +139,16 @@ void alloc_clear(struct alloc_data *alloc)
{
prevPtr = alloc->bits[i];
celt_free(alloc->bits[i]);
celt_free(alloc->rev_bits[i]);
}
}
celt_free(alloc->bits);
celt_free(alloc->rev_bits);
}
int compute_allocation(const CELTMode *m, int *pulses)
{
int i, N, BC, bits;
const int *eBands = m->eBands;
BC = m->nbMdctBlocks*m->nbChannels;
bits = 0;
for (i=0;i<m->nbEBands;i++)
{
int q;
N = BC*(eBands[i+1]-eBands[i]);
q = pulses[i];
if (q<=0)
{
bits += log2_frac64(eBands[i] - (eBands[i+1]-eBands[i]), 8) + (1<<8);
q = -q;
}
if (q != 0)
bits += log2_frac64(ncwrs64(N, pulses[i]), 8);
}
return (bits+255)>>8;
}
int bits2pulses(const struct alloc_data *alloc, int band, int bits)
{
int lo, hi;
lo = 0;
hi = MAX_PULSES;
hi = MAX_PULSES-1;
while (hi-lo != 1)
{
@ -218,48 +164,23 @@ int bits2pulses(const struct alloc_data *alloc, int band, int bits)
return hi;
}
int vec_bits2pulses(const struct alloc_data *alloc, const int *bands, int *bits, int *pulses, int len, int B)
int vec_bits2pulses(const struct alloc_data *alloc, const int *bands, int *bits, int *pulses, int len)
{
int i;
int i, BC;
int sum=0;
BC = alloc->mode->nbMdctBlocks*alloc->mode->nbChannels;
for (i=0;i<len;i++)
{
int N = (bands[i+1]-bands[i])*B;
int N = (bands[i+1]-bands[i])*BC;
pulses[i] = bits2pulses(alloc, i, bits[i]);
sum += alloc->bits[i][pulses[i]];
}
//printf ("sum = %d\n", sum);
return sum;
}
#if 0
int interp_bits2pulses(const struct alloc_data *alloc, int *bits1, int *bits2, int total, int *pulses, int len, int B)
{
int i;
const int *bands = alloc->bands;
/* FIXME: This too is terribly inefficient. We should do a bisection instead */
for (i=0;i<16;i++)
{
int j;
int bits[len];
for (j=0;j<len;j++)
bits[j] = ((16-i)*bits1[j] + i*bits2[j]);
if (vec_bits2pulses(alloc, bands, bits, pulses, len, B) > total)
break;
}
if (i==0)
return -1;
else {
int j;
int bits[len];
/* Get the previous one (that didn't bust). Should rewrite that anyway */
i--;
for (j=0;j<len;j++)
bits[j] = ((16-i)*bits1[j] + i*bits2[j]);
return vec_bits2pulses(alloc, bands, bits, pulses, len, B);
}
}
#else
int interp_bits2pulses(const struct alloc_data *alloc, int *bits1, int *bits2, int total, int *pulses, int len, int B)
int interp_bits2pulses(const struct alloc_data *alloc, int *bits1, int *bits2, int total, int *pulses, int len)
{
int lo, hi, out;
int j;
@ -273,28 +194,29 @@ int interp_bits2pulses(const struct alloc_data *alloc, int *bits1, int *bits2, i
int mid = (lo+hi)>>1;
for (j=0;j<len;j++)
bits[j] = ((1<<BITRES)-mid)*bits1[j] + mid*bits2[j];
if (vec_bits2pulses(alloc, bands, bits, pulses, len, B) > total<<BITRES)
if (vec_bits2pulses(alloc, bands, bits, pulses, len) > total<<BITRES)
hi = mid;
else
lo = mid;
}
//printf ("interp bisection gave %d\n", lo);
for (j=0;j<len;j++)
bits[j] = ((1<<BITRES)-lo)*bits1[j] + lo*bits2[j];
out = vec_bits2pulses(alloc, bands, bits, pulses, len, B);
out = vec_bits2pulses(alloc, bands, bits, pulses, len);
/* Do some refinement to use up all bits */
while(1)
{
int incremented = 0;
for (j=0;j<len;j++)
{
if (alloc->bits[j][pulses[j]] < bits[j])
if (alloc->bits[j][pulses[j]] < bits[j] && pulses[j]<MAX_PULSES-1)
{
if (out+alloc->bits[j][pulses[j]+1]-alloc->bits[j][pulses[j]] <= total<<BITRES)
{
out = out+alloc->bits[j][pulses[j]+1]-alloc->bits[j][pulses[j]];
pulses[j] += 1;
incremented = 1;
//printf ("INCREMENT %d\n", j);
}
}
}
@ -303,23 +225,61 @@ int interp_bits2pulses(const struct alloc_data *alloc, int *bits1, int *bits2, i
}
return (out+BITROUND) >> BITRES;
}
#endif
int compute_allocation(const struct alloc_data *alloc, int *offsets, int total, int *pulses)
{
int lo, hi, len;
const CELTMode *m;
m = alloc->mode;
len = m->nbEBands;
lo = 0;
hi = m->nbAllocVectors - 1;
while (hi-lo != 1)
{
int j;
int bits[len];
int pulses[len];
int mid = (lo+hi) >> 1;
for (j=0;j<len;j++)
{
bits[j] = (m->allocVectors[mid*len+j] + offsets[j])<<BITRES;
if (bits[j] < 0)
bits[j] = 0;
//printf ("%d ", bits[j]);
}
//printf ("\n");
if (vec_bits2pulses(alloc, alloc->bands, bits, pulses, len) > total<<BITRES)
hi = mid;
else
lo = mid;
//printf ("lo = %d, hi = %d\n", lo, hi);
}
{
int bits1[len];
int bits2[len];
int j;
for (j=0;j<len;j++)
{
bits1[j] = m->allocVectors[lo*len+j] + offsets[j];
bits2[j] = m->allocVectors[hi*len+j] + offsets[j];
if (bits1[j] < 0)
bits1[j] = 0;
if (bits2[j] < 0)
bits2[j] = 0;
}
return interp_bits2pulses(alloc, bits1, bits2, total, pulses, len);
}
}
#if 0
int main()
{
int i;
/*for(i=1;i<2000000000;i+=1738)
printf ("log(128) = %d\n", EC_ILOG(128));
for(i=1;i<2000000000;i+=1738)
{
printf ("%d %d\n", i, frac_log2(i, 10));
}*/
for (i=4;i<=32;i*=2)
{
int j;
for (j=0;j<30;j++)
{
printf ("%d %d %d\n", i, j, bits2pulses(j,i));
}
printf ("%d %d\n", i, log2_frac(i, 10));
}
return 0;
}
@ -328,6 +288,7 @@ int main()
int main()
{
int i;
int offsets[18] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
int bits[18] = {10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 9, 10, 8, 9, 10, 11, 6, 7};
int bits1[18] = {8, 7, 7, 6, 6, 6, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5};
int bits2[18] = {15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15};
@ -336,12 +297,14 @@ int main()
struct alloc_data alloc;
alloc_init(&alloc, celt_mode0);
int b = vec_bits2pulses(&alloc, bank, bits, pulses, 18, 1);
printf ("total: %d bits\n", b);
for (i=0;i<18;i++)
printf ("%d ", pulses[i]);
printf ("\n");
b = interp_bits2pulses(&alloc, bits1, bits2, 162, pulses, 18, 1);
int b;
//b = vec_bits2pulses(&alloc, bank, bits, pulses, 18);
//printf ("total: %d bits\n", b);
//for (i=0;i<18;i++)
// printf ("%d ", pulses[i]);
//printf ("\n");
//b = interp_bits2pulses(&alloc, bits1, bits2, 162, pulses, 18);
b = compute_allocation(&alloc, offsets, 190, pulses);
printf ("total: %d bits\n", b);
for (i=0;i<18;i++)
printf ("%d ", pulses[i]);

60
libcelt/rate.h
View file

@ -1,13 +1,49 @@
//
// C++ Interface: rate
//
// Description:
//
//
// Author: Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>, (C) 2008
//
// Copyright: See COPYING file that comes with this distribution
//
//
int compute_allocation(const CELTMode *m, int *pulses);
/* (C) 2007 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.
*/
#ifndef RATE_H
#define RATE_H
struct alloc_data {
const CELTMode *mode;
int len;
const int *bands;
int **bits;
};
void alloc_init(struct alloc_data *alloc, const CELTMode *m);
void alloc_clear(struct alloc_data *alloc);
int compute_allocation(const struct alloc_data *alloc, int *offsets, int total, int *pulses);
#endif