mirror of https://git.ffmpeg.org/ffmpeg.git
206 lines
5.6 KiB
C
206 lines
5.6 KiB
C
/*
|
|
* Copyright (c) 2001, 2002 Fabrice Bellard
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/mem.h"
|
|
#include "dct32.h"
|
|
#include "mathops.h"
|
|
#include "mpegaudiodsp.h"
|
|
#include "mpegaudio.h"
|
|
#include "mpegaudiodata.h"
|
|
|
|
#if CONFIG_FLOAT
|
|
#define RENAME(n) n##_float
|
|
|
|
static inline float round_sample(float *sum)
|
|
{
|
|
float sum1=*sum;
|
|
*sum = 0;
|
|
return sum1;
|
|
}
|
|
|
|
#define MACS(rt, ra, rb) rt+=(ra)*(rb)
|
|
#define MULS(ra, rb) ((ra)*(rb))
|
|
#define MLSS(rt, ra, rb) rt-=(ra)*(rb)
|
|
|
|
#else
|
|
|
|
#define RENAME(n) n##_fixed
|
|
#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15)
|
|
|
|
static inline int round_sample(int64_t *sum)
|
|
{
|
|
int sum1;
|
|
sum1 = (int)((*sum) >> OUT_SHIFT);
|
|
*sum &= (1<<OUT_SHIFT)-1;
|
|
return av_clip_int16(sum1);
|
|
}
|
|
|
|
# define MULS(ra, rb) MUL64(ra, rb)
|
|
# define MACS(rt, ra, rb) MAC64(rt, ra, rb)
|
|
# define MLSS(rt, ra, rb) MLS64(rt, ra, rb)
|
|
#endif
|
|
|
|
DECLARE_ALIGNED(16, MPA_INT, RENAME(ff_mpa_synth_window))[512+256];
|
|
|
|
#define SUM8(op, sum, w, p) \
|
|
{ \
|
|
op(sum, (w)[0 * 64], (p)[0 * 64]); \
|
|
op(sum, (w)[1 * 64], (p)[1 * 64]); \
|
|
op(sum, (w)[2 * 64], (p)[2 * 64]); \
|
|
op(sum, (w)[3 * 64], (p)[3 * 64]); \
|
|
op(sum, (w)[4 * 64], (p)[4 * 64]); \
|
|
op(sum, (w)[5 * 64], (p)[5 * 64]); \
|
|
op(sum, (w)[6 * 64], (p)[6 * 64]); \
|
|
op(sum, (w)[7 * 64], (p)[7 * 64]); \
|
|
}
|
|
|
|
#define SUM8P2(sum1, op1, sum2, op2, w1, w2, p) \
|
|
{ \
|
|
INTFLOAT tmp;\
|
|
tmp = p[0 * 64];\
|
|
op1(sum1, (w1)[0 * 64], tmp);\
|
|
op2(sum2, (w2)[0 * 64], tmp);\
|
|
tmp = p[1 * 64];\
|
|
op1(sum1, (w1)[1 * 64], tmp);\
|
|
op2(sum2, (w2)[1 * 64], tmp);\
|
|
tmp = p[2 * 64];\
|
|
op1(sum1, (w1)[2 * 64], tmp);\
|
|
op2(sum2, (w2)[2 * 64], tmp);\
|
|
tmp = p[3 * 64];\
|
|
op1(sum1, (w1)[3 * 64], tmp);\
|
|
op2(sum2, (w2)[3 * 64], tmp);\
|
|
tmp = p[4 * 64];\
|
|
op1(sum1, (w1)[4 * 64], tmp);\
|
|
op2(sum2, (w2)[4 * 64], tmp);\
|
|
tmp = p[5 * 64];\
|
|
op1(sum1, (w1)[5 * 64], tmp);\
|
|
op2(sum2, (w2)[5 * 64], tmp);\
|
|
tmp = p[6 * 64];\
|
|
op1(sum1, (w1)[6 * 64], tmp);\
|
|
op2(sum2, (w2)[6 * 64], tmp);\
|
|
tmp = p[7 * 64];\
|
|
op1(sum1, (w1)[7 * 64], tmp);\
|
|
op2(sum2, (w2)[7 * 64], tmp);\
|
|
}
|
|
|
|
void RENAME(ff_mpadsp_apply_window)(MPA_INT *synth_buf, MPA_INT *window,
|
|
int *dither_state, OUT_INT *samples,
|
|
int incr)
|
|
{
|
|
register const MPA_INT *w, *w2, *p;
|
|
int j;
|
|
OUT_INT *samples2;
|
|
#if CONFIG_FLOAT
|
|
float sum, sum2;
|
|
#else
|
|
int64_t sum, sum2;
|
|
#endif
|
|
|
|
/* copy to avoid wrap */
|
|
memcpy(synth_buf + 512, synth_buf, 32 * sizeof(*synth_buf));
|
|
|
|
samples2 = samples + 31 * incr;
|
|
w = window;
|
|
w2 = window + 31;
|
|
|
|
sum = *dither_state;
|
|
p = synth_buf + 16;
|
|
SUM8(MACS, sum, w, p);
|
|
p = synth_buf + 48;
|
|
SUM8(MLSS, sum, w + 32, p);
|
|
*samples = round_sample(&sum);
|
|
samples += incr;
|
|
w++;
|
|
|
|
/* we calculate two samples at the same time to avoid one memory
|
|
access per two sample */
|
|
for(j=1;j<16;j++) {
|
|
sum2 = 0;
|
|
p = synth_buf + 16 + j;
|
|
SUM8P2(sum, MACS, sum2, MLSS, w, w2, p);
|
|
p = synth_buf + 48 - j;
|
|
SUM8P2(sum, MLSS, sum2, MLSS, w + 32, w2 + 32, p);
|
|
|
|
*samples = round_sample(&sum);
|
|
samples += incr;
|
|
sum += sum2;
|
|
*samples2 = round_sample(&sum);
|
|
samples2 -= incr;
|
|
w++;
|
|
w2--;
|
|
}
|
|
|
|
p = synth_buf + 32;
|
|
SUM8(MLSS, sum, w + 32, p);
|
|
*samples = round_sample(&sum);
|
|
*dither_state= sum;
|
|
}
|
|
|
|
/* 32 sub band synthesis filter. Input: 32 sub band samples, Output:
|
|
32 samples. */
|
|
void RENAME(ff_mpa_synth_filter)(MPADSPContext *s, MPA_INT *synth_buf_ptr,
|
|
int *synth_buf_offset,
|
|
MPA_INT *window, int *dither_state,
|
|
OUT_INT *samples, int incr,
|
|
MPA_INT *sb_samples)
|
|
{
|
|
MPA_INT *synth_buf;
|
|
int offset;
|
|
|
|
offset = *synth_buf_offset;
|
|
synth_buf = synth_buf_ptr + offset;
|
|
|
|
s->RENAME(dct32)(synth_buf, sb_samples);
|
|
s->RENAME(apply_window)(synth_buf, window, dither_state, samples, incr);
|
|
|
|
offset = (offset - 32) & 511;
|
|
*synth_buf_offset = offset;
|
|
}
|
|
|
|
void av_cold RENAME(ff_mpa_synth_init)(MPA_INT *window)
|
|
{
|
|
int i, j;
|
|
|
|
/* max = 18760, max sum over all 16 coefs : 44736 */
|
|
for(i=0;i<257;i++) {
|
|
INTFLOAT v;
|
|
v = ff_mpa_enwindow[i];
|
|
#if CONFIG_FLOAT
|
|
v *= 1.0 / (1LL<<(16 + FRAC_BITS));
|
|
#endif
|
|
window[i] = v;
|
|
if ((i & 63) != 0)
|
|
v = -v;
|
|
if (i != 0)
|
|
window[512 - i] = v;
|
|
}
|
|
|
|
// Needed for avoiding shuffles in ASM implementations
|
|
for(i=0; i < 8; i++)
|
|
for(j=0; j < 16; j++)
|
|
window[512+16*i+j] = window[64*i+32-j];
|
|
|
|
for(i=0; i < 8; i++)
|
|
for(j=0; j < 16; j++)
|
|
window[512+128+16*i+j] = window[64*i+48-j];
|
|
}
|