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/* |
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* Copyright (c) 2001, 2002 Fabrice Bellard |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stdint.h> |
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#include "libavutil/attributes.h" |
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#include "libavutil/mem.h" |
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#include "dct32.h" |
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#include "mathops.h" |
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#include "mpegaudiodsp.h" |
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#include "mpegaudio.h" |
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#if USE_FLOATS |
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#define RENAME(n) n##_float |
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3012864 |
static inline float round_sample(float *sum) |
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{ |
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3012864 |
float sum1=*sum; |
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3012864 |
*sum = 0; |
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3012864 |
return sum1; |
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} |
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#define MACS(rt, ra, rb) rt+=(ra)*(rb) |
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#define MULS(ra, rb) ((ra)*(rb)) |
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#define MULH3(x, y, s) ((s)*(y)*(x)) |
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#define MLSS(rt, ra, rb) rt-=(ra)*(rb) |
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#define MULLx(x, y, s) ((y)*(x)) |
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#define FIXHR(x) ((float)(x)) |
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#define FIXR(x) ((float)(x)) |
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#define SHR(a,b) ((a)*(1.0f/(1<<(b)))) |
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#else |
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#define RENAME(n) n##_fixed |
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#define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15) |
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12857472 |
static inline int round_sample(int64_t *sum) |
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{ |
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int sum1; |
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12857472 |
sum1 = (int)((*sum) >> OUT_SHIFT); |
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12857472 |
*sum &= (1<<OUT_SHIFT)-1; |
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12857472 |
return av_clip_int16(sum1); |
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} |
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# define MULS(ra, rb) MUL64(ra, rb) |
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# define MACS(rt, ra, rb) MAC64(rt, ra, rb) |
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# define MLSS(rt, ra, rb) MLS64(rt, ra, rb) |
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# define MULH3(x, y, s) MULH((s)*(x), y) |
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# define MULLx(x, y, s) MULL((int)(x),(y),s) |
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# define SHR(a,b) (((int)(a))>>(b)) |
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# define FIXR(a) ((int)((a) * FRAC_ONE + 0.5)) |
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# define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5)) |
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#endif |
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/** Window for MDCT. Actually only the elements in [0,17] and |
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[MDCT_BUF_SIZE/2, MDCT_BUF_SIZE/2 + 17] are actually used. The rest |
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is just to preserve alignment for SIMD implementations. |
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*/ |
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DECLARE_ALIGNED(16, INTFLOAT, RENAME(ff_mdct_win))[8][MDCT_BUF_SIZE]; |
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DECLARE_ALIGNED(16, MPA_INT, RENAME(ff_mpa_synth_window))[512+256]; |
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#define SUM8(op, sum, w, p) \ |
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{ \ |
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op(sum, (w)[0 * 64], (p)[0 * 64]); \ |
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op(sum, (w)[1 * 64], (p)[1 * 64]); \ |
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op(sum, (w)[2 * 64], (p)[2 * 64]); \ |
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op(sum, (w)[3 * 64], (p)[3 * 64]); \ |
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op(sum, (w)[4 * 64], (p)[4 * 64]); \ |
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op(sum, (w)[5 * 64], (p)[5 * 64]); \ |
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op(sum, (w)[6 * 64], (p)[6 * 64]); \ |
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op(sum, (w)[7 * 64], (p)[7 * 64]); \ |
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} |
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#define SUM8P2(sum1, op1, sum2, op2, w1, w2, p) \ |
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{ \ |
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INTFLOAT tmp;\ |
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tmp = p[0 * 64];\ |
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op1(sum1, (w1)[0 * 64], tmp);\ |
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op2(sum2, (w2)[0 * 64], tmp);\ |
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tmp = p[1 * 64];\ |
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op1(sum1, (w1)[1 * 64], tmp);\ |
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op2(sum2, (w2)[1 * 64], tmp);\ |
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tmp = p[2 * 64];\ |
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op1(sum1, (w1)[2 * 64], tmp);\ |
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op2(sum2, (w2)[2 * 64], tmp);\ |
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tmp = p[3 * 64];\ |
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op1(sum1, (w1)[3 * 64], tmp);\ |
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op2(sum2, (w2)[3 * 64], tmp);\ |
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tmp = p[4 * 64];\ |
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op1(sum1, (w1)[4 * 64], tmp);\ |
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op2(sum2, (w2)[4 * 64], tmp);\ |
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tmp = p[5 * 64];\ |
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op1(sum1, (w1)[5 * 64], tmp);\ |
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op2(sum2, (w2)[5 * 64], tmp);\ |
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tmp = p[6 * 64];\ |
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op1(sum1, (w1)[6 * 64], tmp);\ |
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op2(sum2, (w2)[6 * 64], tmp);\ |
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tmp = p[7 * 64];\ |
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op1(sum1, (w1)[7 * 64], tmp);\ |
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op2(sum2, (w2)[7 * 64], tmp);\ |
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} |
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495948 |
void RENAME(ff_mpadsp_apply_window)(MPA_INT *synth_buf, MPA_INT *window, |
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int *dither_state, OUT_INT *samples, |
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ptrdiff_t incr) |
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{ |
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register const MPA_INT *w, *w2, *p; |
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int j; |
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OUT_INT *samples2; |
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#if USE_FLOATS |
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float sum, sum2; |
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#else |
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int64_t sum, sum2; |
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#endif |
133 |
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/* copy to avoid wrap */ |
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495948 |
memcpy(synth_buf + 512, synth_buf, 32 * sizeof(*synth_buf)); |
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495948 |
samples2 = samples + 31 * incr; |
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495948 |
w = window; |
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495948 |
w2 = window + 31; |
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495948 |
sum = *dither_state; |
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495948 |
p = synth_buf + 16; |
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495948 |
SUM8(MACS, sum, w, p); |
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495948 |
p = synth_buf + 48; |
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495948 |
SUM8(MLSS, sum, w + 32, p); |
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495948 |
*samples = round_sample(&sum); |
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495948 |
samples += incr; |
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495948 |
w++; |
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/* we calculate two samples at the same time to avoid one memory |
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access per two sample */ |
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✓✓ |
7935168 |
for(j=1;j<16;j++) { |
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7439220 |
sum2 = 0; |
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7439220 |
p = synth_buf + 16 + j; |
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7439220 |
SUM8P2(sum, MACS, sum2, MLSS, w, w2, p); |
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7439220 |
p = synth_buf + 48 - j; |
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7439220 |
SUM8P2(sum, MLSS, sum2, MLSS, w + 32, w2 + 32, p); |
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7439220 |
*samples = round_sample(&sum); |
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7439220 |
samples += incr; |
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7439220 |
sum += sum2; |
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7439220 |
*samples2 = round_sample(&sum); |
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7439220 |
samples2 -= incr; |
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7439220 |
w++; |
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7439220 |
w2--; |
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} |
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495948 |
p = synth_buf + 32; |
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495948 |
SUM8(MLSS, sum, w + 32, p); |
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495948 |
*samples = round_sample(&sum); |
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495948 |
*dither_state= sum; |
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495948 |
} |
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/* 32 sub band synthesis filter. Input: 32 sub band samples, Output: |
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32 samples. */ |
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498036 |
void RENAME(ff_mpa_synth_filter)(MPADSPContext *s, MPA_INT *synth_buf_ptr, |
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int *synth_buf_offset, |
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MPA_INT *window, int *dither_state, |
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OUT_INT *samples, ptrdiff_t incr, |
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MPA_INT *sb_samples) |
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{ |
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MPA_INT *synth_buf; |
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int offset; |
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498036 |
offset = *synth_buf_offset; |
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498036 |
synth_buf = synth_buf_ptr + offset; |
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498036 |
s->RENAME(dct32)(synth_buf, sb_samples); |
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498036 |
s->RENAME(apply_window)(synth_buf, window, dither_state, samples, incr); |
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498036 |
offset = (offset - 32) & 511; |
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498036 |
*synth_buf_offset = offset; |
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498036 |
} |
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av_cold void RENAME(ff_mpa_synth_init)(MPA_INT *window) |
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{ |
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int i, j; |
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/* max = 18760, max sum over all 16 coefs : 44736 */ |
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✓✓ |
24252 |
for(i=0;i<257;i++) { |
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INTFLOAT v; |
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24158 |
v = ff_mpa_enwindow[i]; |
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#if USE_FLOATS |
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11822 |
v *= 1.0 / (1LL<<(16 + FRAC_BITS)); |
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#endif |
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24158 |
window[i] = v; |
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✓✓ |
24158 |
if ((i & 63) != 0) |
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23688 |
v = -v; |
209 |
✓✓ |
24158 |
if (i != 0) |
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24064 |
window[512 - i] = v; |
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} |
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// Needed for avoiding shuffles in ASM implementations |
215 |
✓✓ |
846 |
for(i=0; i < 8; i++) |
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✓✓ |
12784 |
for(j=0; j < 16; j++) |
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12032 |
window[512+16*i+j] = window[64*i+32-j]; |
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✓✓ |
846 |
for(i=0; i < 8; i++) |
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✓✓ |
12784 |
for(j=0; j < 16; j++) |
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12032 |
window[512+128+16*i+j] = window[64*i+48-j]; |
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} |
223 |
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224 |
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av_cold void RENAME(ff_init_mpadsp_tabs)(void) |
225 |
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{ |
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int i, j; |
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/* compute mdct windows */ |
228 |
✓✓ |
5624 |
for (i = 0; i < 36; i++) { |
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✓✓ |
27360 |
for (j = 0; j < 4; j++) { |
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double d; |
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232 |
✓✓✓✓
|
21888 |
if (j == 2 && i % 3 != 1) |
233 |
|
3648 |
continue; |
234 |
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235 |
|
18240 |
d = sin(M_PI * (i + 0.5) / 36.0); |
236 |
✓✓ |
18240 |
if (j == 1) { |
237 |
✓✓ |
5472 |
if (i >= 30) d = 0; |
238 |
✓✓ |
4560 |
else if (i >= 24) d = sin(M_PI * (i - 18 + 0.5) / 12.0); |
239 |
✓✓ |
3648 |
else if (i >= 18) d = 1; |
240 |
✓✓ |
12768 |
} else if (j == 3) { |
241 |
✓✓ |
5472 |
if (i < 6) d = 0; |
242 |
✓✓ |
4560 |
else if (i < 12) d = sin(M_PI * (i - 6 + 0.5) / 12.0); |
243 |
✓✓ |
3648 |
else if (i < 18) d = 1; |
244 |
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} |
245 |
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//merge last stage of imdct into the window coefficients |
246 |
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18240 |
d *= 0.5 * IMDCT_SCALAR / cos(M_PI * (2 * i + 19) / 72); |
247 |
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248 |
✓✓ |
18240 |
if (j == 2) |
249 |
|
1824 |
RENAME(ff_mdct_win)[j][i/3] = FIXHR((d / (1<<5))); |
250 |
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else { |
251 |
✓✓ |
16416 |
int idx = i < 18 ? i : i + (MDCT_BUF_SIZE/2 - 18); |
252 |
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16416 |
RENAME(ff_mdct_win)[j][idx] = FIXHR((d / (1<<5))); |
253 |
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} |
254 |
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} |
255 |
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} |
256 |
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257 |
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/* NOTE: we do frequency inversion adter the MDCT by changing |
258 |
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the sign of the right window coefs */ |
259 |
✓✓ |
760 |
for (j = 0; j < 4; j++) { |
260 |
✓✓ |
12768 |
for (i = 0; i < MDCT_BUF_SIZE; i += 2) { |
261 |
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12160 |
RENAME(ff_mdct_win)[j + 4][i ] = RENAME(ff_mdct_win)[j][i ]; |
262 |
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12160 |
RENAME(ff_mdct_win)[j + 4][i + 1] = -RENAME(ff_mdct_win)[j][i + 1]; |
263 |
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} |
264 |
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} |
265 |
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152 |
} |
266 |
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/* cos(pi*i/18) */ |
267 |
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#define C1 FIXHR(0.98480775301220805936/2) |
268 |
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#define C2 FIXHR(0.93969262078590838405/2) |
269 |
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#define C3 FIXHR(0.86602540378443864676/2) |
270 |
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#define C4 FIXHR(0.76604444311897803520/2) |
271 |
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#define C5 FIXHR(0.64278760968653932632/2) |
272 |
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#define C6 FIXHR(0.5/2) |
273 |
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#define C7 FIXHR(0.34202014332566873304/2) |
274 |
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#define C8 FIXHR(0.17364817766693034885/2) |
275 |
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276 |
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/* 0.5 / cos(pi*(2*i+1)/36) */ |
277 |
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static const INTFLOAT icos36[9] = { |
278 |
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FIXR(0.50190991877167369479), |
279 |
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FIXR(0.51763809020504152469), //0 |
280 |
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FIXR(0.55168895948124587824), |
281 |
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FIXR(0.61038729438072803416), |
282 |
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FIXR(0.70710678118654752439), //1 |
283 |
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FIXR(0.87172339781054900991), |
284 |
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FIXR(1.18310079157624925896), |
285 |
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FIXR(1.93185165257813657349), //2 |
286 |
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FIXR(5.73685662283492756461), |
287 |
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}; |
288 |
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|
289 |
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/* 0.5 / cos(pi*(2*i+1)/36) */ |
290 |
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static const INTFLOAT icos36h[9] = { |
291 |
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FIXHR(0.50190991877167369479/2), |
292 |
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FIXHR(0.51763809020504152469/2), //0 |
293 |
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FIXHR(0.55168895948124587824/2), |
294 |
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FIXHR(0.61038729438072803416/2), |
295 |
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FIXHR(0.70710678118654752439/2), //1 |
296 |
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FIXHR(0.87172339781054900991/2), |
297 |
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FIXHR(1.18310079157624925896/4), |
298 |
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FIXHR(1.93185165257813657349/4), //2 |
299 |
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// FIXHR(5.73685662283492756461), |
300 |
|
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}; |
301 |
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|
302 |
|
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/* using Lee like decomposition followed by hand coded 9 points DCT */ |
303 |
|
155407 |
static void imdct36(INTFLOAT *out, INTFLOAT *buf, SUINTFLOAT *in, INTFLOAT *win) |
304 |
|
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{ |
305 |
|
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int i, j; |
306 |
|
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SUINTFLOAT t0, t1, t2, t3, s0, s1, s2, s3; |
307 |
|
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SUINTFLOAT tmp[18], *tmp1, *in1; |
308 |
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|
309 |
✓✓ |
2797326 |
for (i = 17; i >= 1; i--) |
310 |
|
2641919 |
in[i] += in[i-1]; |
311 |
✓✓ |
1398663 |
for (i = 17; i >= 3; i -= 2) |
312 |
|
1243256 |
in[i] += in[i-2]; |
313 |
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|
314 |
✓✓ |
466221 |
for (j = 0; j < 2; j++) { |
315 |
|
310814 |
tmp1 = tmp + j; |
316 |
|
310814 |
in1 = in + j; |
317 |
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|
318 |
|
310814 |
t2 = in1[2*4] + in1[2*8] - in1[2*2]; |
319 |
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|
320 |
|
310814 |
t3 = in1[2*0] + SHR(in1[2*6],1); |
321 |
|
310814 |
t1 = in1[2*0] - in1[2*6]; |
322 |
|
310814 |
tmp1[ 6] = t1 - SHR(t2,1); |
323 |
|
310814 |
tmp1[16] = t1 + t2; |
324 |
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|
325 |
|
310814 |
t0 = MULH3(in1[2*2] + in1[2*4] , C2, 2); |
326 |
|
310814 |
t1 = MULH3(in1[2*4] - in1[2*8] , -2*C8, 1); |
327 |
|
310814 |
t2 = MULH3(in1[2*2] + in1[2*8] , -C4, 2); |
328 |
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|
329 |
|
310814 |
tmp1[10] = t3 - t0 - t2; |
330 |
|
310814 |
tmp1[ 2] = t3 + t0 + t1; |
331 |
|
310814 |
tmp1[14] = t3 + t2 - t1; |
332 |
|
|
|
333 |
|
310814 |
tmp1[ 4] = MULH3(in1[2*5] + in1[2*7] - in1[2*1], -C3, 2); |
334 |
|
310814 |
t2 = MULH3(in1[2*1] + in1[2*5], C1, 2); |
335 |
|
310814 |
t3 = MULH3(in1[2*5] - in1[2*7], -2*C7, 1); |
336 |
|
310814 |
t0 = MULH3(in1[2*3], C3, 2); |
337 |
|
|
|
338 |
|
310814 |
t1 = MULH3(in1[2*1] + in1[2*7], -C5, 2); |
339 |
|
|
|
340 |
|
310814 |
tmp1[ 0] = t2 + t3 + t0; |
341 |
|
310814 |
tmp1[12] = t2 + t1 - t0; |
342 |
|
310814 |
tmp1[ 8] = t3 - t1 - t0; |
343 |
|
|
} |
344 |
|
|
|
345 |
|
155407 |
i = 0; |
346 |
✓✓ |
777035 |
for (j = 0; j < 4; j++) { |
347 |
|
621628 |
t0 = tmp[i]; |
348 |
|
621628 |
t1 = tmp[i + 2]; |
349 |
|
621628 |
s0 = t1 + t0; |
350 |
|
621628 |
s2 = t1 - t0; |
351 |
|
|
|
352 |
|
621628 |
t2 = tmp[i + 1]; |
353 |
|
621628 |
t3 = tmp[i + 3]; |
354 |
|
621628 |
s1 = MULH3(t3 + t2, icos36h[ j], 2); |
355 |
|
621628 |
s3 = MULLx(t3 - t2, icos36 [8 - j], FRAC_BITS); |
356 |
|
|
|
357 |
|
621628 |
t0 = s0 + s1; |
358 |
|
621628 |
t1 = s0 - s1; |
359 |
|
621628 |
out[(9 + j) * SBLIMIT] = MULH3(t1, win[ 9 + j], 1) + buf[4*(9 + j)]; |
360 |
|
621628 |
out[(8 - j) * SBLIMIT] = MULH3(t1, win[ 8 - j], 1) + buf[4*(8 - j)]; |
361 |
|
621628 |
buf[4 * ( 9 + j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + j], 1); |
362 |
|
621628 |
buf[4 * ( 8 - j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 8 - j], 1); |
363 |
|
|
|
364 |
|
621628 |
t0 = s2 + s3; |
365 |
|
621628 |
t1 = s2 - s3; |
366 |
|
621628 |
out[(9 + 8 - j) * SBLIMIT] = MULH3(t1, win[ 9 + 8 - j], 1) + buf[4*(9 + 8 - j)]; |
367 |
|
621628 |
out[ j * SBLIMIT] = MULH3(t1, win[ j], 1) + buf[4*( j)]; |
368 |
|
621628 |
buf[4 * ( 9 + 8 - j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + 8 - j], 1); |
369 |
|
621628 |
buf[4 * ( j )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + j], 1); |
370 |
|
621628 |
i += 4; |
371 |
|
|
} |
372 |
|
|
|
373 |
|
155407 |
s0 = tmp[16]; |
374 |
|
155407 |
s1 = MULH3(tmp[17], icos36h[4], 2); |
375 |
|
155407 |
t0 = s0 + s1; |
376 |
|
155407 |
t1 = s0 - s1; |
377 |
|
155407 |
out[(9 + 4) * SBLIMIT] = MULH3(t1, win[ 9 + 4], 1) + buf[4*(9 + 4)]; |
378 |
|
155407 |
out[(8 - 4) * SBLIMIT] = MULH3(t1, win[ 8 - 4], 1) + buf[4*(8 - 4)]; |
379 |
|
155407 |
buf[4 * ( 9 + 4 )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 9 + 4], 1); |
380 |
|
155407 |
buf[4 * ( 8 - 4 )] = MULH3(t0, win[MDCT_BUF_SIZE/2 + 8 - 4], 1); |
381 |
|
155407 |
} |
382 |
|
|
|
383 |
|
8014 |
void RENAME(ff_imdct36_blocks)(INTFLOAT *out, INTFLOAT *buf, INTFLOAT *in, |
384 |
|
|
int count, int switch_point, int block_type) |
385 |
|
|
{ |
386 |
|
|
int j; |
387 |
✓✓ |
163421 |
for (j=0 ; j < count; j++) { |
388 |
|
|
/* apply window & overlap with previous buffer */ |
389 |
|
|
|
390 |
|
|
/* select window */ |
391 |
✓✓✓✓
|
155407 |
int win_idx = (switch_point && j < 2) ? 0 : block_type; |
392 |
|
155407 |
INTFLOAT *win = RENAME(ff_mdct_win)[win_idx + (4 & -(j & 1))]; |
393 |
|
|
|
394 |
|
155407 |
imdct36(out, buf, in, win); |
395 |
|
|
|
396 |
|
155407 |
in += 18; |
397 |
✓✓ |
155407 |
buf += ((j&3) != 3 ? 1 : (72-3)); |
398 |
|
155407 |
out++; |
399 |
|
|
} |
400 |
|
8014 |
} |
401 |
|
|
|