mirror of
https://github.com/FFmpeg/FFmpeg.git
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127da193d4
Before 3793caa5e2 the code was
"if (...) do { ... } while (...);". After said commit this became
"if (...) av_assert0(...); do { ... } while (...);", i.e. the loop
is always executed. This commit changes the logic to what it was before
said commit. Notice that the condition is always true in FATE, so no
changes are necessary there.
This fixes a -Wmisleading-indentation warning from GCC 11.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
265 lines
7.0 KiB
C
265 lines
7.0 KiB
C
/*
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* adaptive and fixed codebook vector operations for ACELP-based codecs
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*
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* Copyright (c) 2008 Vladimir Voroshilov
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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 <inttypes.h>
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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/float_dsp.h"
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#include "avcodec.h"
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#include "acelp_vectors.h"
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const uint8_t ff_fc_2pulses_9bits_track1_gray[16] =
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{
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1, 3,
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8, 6,
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18, 16,
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11, 13,
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38, 36,
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31, 33,
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21, 23,
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28, 26,
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};
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const uint8_t ff_fc_2pulses_9bits_track2_gray[32] =
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{
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0, 2,
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5, 4,
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12, 10,
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7, 9,
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25, 24,
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20, 22,
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14, 15,
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19, 17,
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36, 31,
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21, 26,
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1, 6,
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16, 11,
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27, 29,
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32, 30,
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39, 37,
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34, 35,
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};
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const uint8_t ff_fc_4pulses_8bits_tracks_13[16] =
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{
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0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75,
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};
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const uint8_t ff_fc_4pulses_8bits_track_4[32] =
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{
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3, 4,
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8, 9,
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13, 14,
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18, 19,
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23, 24,
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28, 29,
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33, 34,
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38, 39,
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43, 44,
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48, 49,
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53, 54,
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58, 59,
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63, 64,
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68, 69,
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73, 74,
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78, 79,
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};
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const float ff_pow_0_7[10] = {
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0.700000, 0.490000, 0.343000, 0.240100, 0.168070,
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0.117649, 0.082354, 0.057648, 0.040354, 0.028248
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};
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const float ff_pow_0_75[10] = {
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0.750000, 0.562500, 0.421875, 0.316406, 0.237305,
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0.177979, 0.133484, 0.100113, 0.075085, 0.056314
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};
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const float ff_pow_0_55[10] = {
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0.550000, 0.302500, 0.166375, 0.091506, 0.050328,
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0.027681, 0.015224, 0.008373, 0.004605, 0.002533
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};
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const float ff_b60_sinc[61] = {
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0.898529 , 0.865051 , 0.769257 , 0.624054 , 0.448639 , 0.265289 ,
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0.0959167 , -0.0412598 , -0.134338 , -0.178986 , -0.178528 , -0.142609 ,
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-0.0849304 , -0.0205078 , 0.0369568 , 0.0773926 , 0.0955200 , 0.0912781 ,
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0.0689392 , 0.0357056 , 0.0 , -0.0305481 , -0.0504150 , -0.0570068 ,
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-0.0508423 , -0.0350037 , -0.0141602 , 0.00665283, 0.0230713 , 0.0323486 ,
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0.0335388 , 0.0275879 , 0.0167847 , 0.00411987, -0.00747681, -0.0156860 ,
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-0.0193481 , -0.0183716 , -0.0137634 , -0.00704956, 0.0 , 0.00582886 ,
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0.00939941, 0.0103760 , 0.00903320, 0.00604248, 0.00238037, -0.00109863 ,
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-0.00366211, -0.00497437, -0.00503540, -0.00402832, -0.00241089, -0.000579834,
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0.00103760, 0.00222778, 0.00277710, 0.00271606, 0.00213623, 0.00115967 ,
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0.
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};
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void ff_acelp_fc_pulse_per_track(
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int16_t* fc_v,
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const uint8_t *tab1,
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const uint8_t *tab2,
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int pulse_indexes,
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int pulse_signs,
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int pulse_count,
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int bits)
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{
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int mask = (1 << bits) - 1;
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int i;
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for(i=0; i<pulse_count; i++)
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{
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fc_v[i + tab1[pulse_indexes & mask]] +=
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(pulse_signs & 1) ? 8191 : -8192; // +/-1 in (2.13)
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pulse_indexes >>= bits;
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pulse_signs >>= 1;
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}
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fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192;
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}
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void ff_decode_10_pulses_35bits(const int16_t *fixed_index,
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AMRFixed *fixed_sparse,
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const uint8_t *gray_decode,
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int half_pulse_count, int bits)
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{
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int i;
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int mask = (1 << bits) - 1;
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fixed_sparse->no_repeat_mask = 0;
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fixed_sparse->n = 2 * half_pulse_count;
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for (i = 0; i < half_pulse_count; i++) {
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const int pos1 = gray_decode[fixed_index[2*i+1] & mask] + i;
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const int pos2 = gray_decode[fixed_index[2*i ] & mask] + i;
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const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0;
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fixed_sparse->x[2*i+1] = pos1;
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fixed_sparse->x[2*i ] = pos2;
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fixed_sparse->y[2*i+1] = sign;
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fixed_sparse->y[2*i ] = pos2 < pos1 ? -sign : sign;
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}
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}
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void ff_acelp_weighted_vector_sum(
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int16_t* out,
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const int16_t *in_a,
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const int16_t *in_b,
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int16_t weight_coeff_a,
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int16_t weight_coeff_b,
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int16_t rounder,
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int shift,
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int length)
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{
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int i;
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// Clipping required here; breaks OVERFLOW test.
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for(i=0; i<length; i++)
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out[i] = av_clip_int16((
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in_a[i] * weight_coeff_a +
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in_b[i] * weight_coeff_b +
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rounder) >> shift);
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}
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void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
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float weight_coeff_a, float weight_coeff_b, int length)
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{
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int i;
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for(i=0; i<length; i++)
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out[i] = weight_coeff_a * in_a[i]
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+ weight_coeff_b * in_b[i];
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}
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void ff_adaptive_gain_control(float *out, const float *in, float speech_energ,
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int size, float alpha, float *gain_mem)
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{
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int i;
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float postfilter_energ = avpriv_scalarproduct_float_c(in, in, size);
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float gain_scale_factor = 1.0;
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float mem = *gain_mem;
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if (postfilter_energ)
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gain_scale_factor = sqrt(speech_energ / postfilter_energ);
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gain_scale_factor *= 1.0 - alpha;
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for (i = 0; i < size; i++) {
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mem = alpha * mem + gain_scale_factor;
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out[i] = in[i] * mem;
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}
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*gain_mem = mem;
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}
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void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
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float sum_of_squares, const int n)
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{
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int i;
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float scalefactor = avpriv_scalarproduct_float_c(in, in, n);
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if (scalefactor)
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scalefactor = sqrt(sum_of_squares / scalefactor);
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for (i = 0; i < n; i++)
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out[i] = in[i] * scalefactor;
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}
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void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size)
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{
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int i;
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for (i=0; i < in->n; i++) {
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int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1);
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float y = in->y[i] * scale;
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if (in->pitch_lag > 0) {
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av_assert0(x < size);
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do {
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out[x] += y;
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y *= in->pitch_fac;
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x += in->pitch_lag;
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} while (x < size && repeats);
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}
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}
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}
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void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size)
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{
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int i;
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for (i=0; i < in->n; i++) {
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int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1);
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if (in->pitch_lag > 0)
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do {
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out[x] = 0.0;
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x += in->pitch_lag;
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} while (x < size && repeats);
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}
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}
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void ff_acelp_vectors_init(ACELPVContext *c)
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{
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c->weighted_vector_sumf = ff_weighted_vector_sumf;
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if(HAVE_MIPSFPU)
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ff_acelp_vectors_init_mips(c);
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}
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