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Diffstat (limited to 'ffmpeg/libavcodec/acelp_vectors.c')
| -rw-r--r-- | ffmpeg/libavcodec/acelp_vectors.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/acelp_vectors.c b/ffmpeg/libavcodec/acelp_vectors.c new file mode 100644 index 0000000..c9d6f87 --- /dev/null +++ b/ffmpeg/libavcodec/acelp_vectors.c @@ -0,0 +1,272 @@ +/* + * adaptive and fixed codebook vector operations for ACELP-based codecs + * + * Copyright (c) 2008 Vladimir Voroshilov + * + * 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 <inttypes.h> + +#include "libavutil/common.h" +#include "libavutil/float_dsp.h" +#include "avcodec.h" +#include "acelp_vectors.h" + +const uint8_t ff_fc_2pulses_9bits_track1[16] = +{ + 1, 3, + 6, 8, + 11, 13, + 16, 18, + 21, 23, + 26, 28, + 31, 33, + 36, 38 +}; +const uint8_t ff_fc_2pulses_9bits_track1_gray[16] = +{ + 1, 3, + 8, 6, + 18, 16, + 11, 13, + 38, 36, + 31, 33, + 21, 23, + 28, 26, +}; + +const uint8_t ff_fc_2pulses_9bits_track2_gray[32] = +{ + 0, 2, + 5, 4, + 12, 10, + 7, 9, + 25, 24, + 20, 22, + 14, 15, + 19, 17, + 36, 31, + 21, 26, + 1, 6, + 16, 11, + 27, 29, + 32, 30, + 39, 37, + 34, 35, +}; + +const uint8_t ff_fc_4pulses_8bits_tracks_13[16] = +{ + 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, +}; + +const uint8_t ff_fc_4pulses_8bits_track_4[32] = +{ + 3, 4, + 8, 9, + 13, 14, + 18, 19, + 23, 24, + 28, 29, + 33, 34, + 38, 39, + 43, 44, + 48, 49, + 53, 54, + 58, 59, + 63, 64, + 68, 69, + 73, 74, + 78, 79, +}; + +const float ff_pow_0_7[10] = { + 0.700000, 0.490000, 0.343000, 0.240100, 0.168070, + 0.117649, 0.082354, 0.057648, 0.040354, 0.028248 +}; + +const float ff_pow_0_75[10] = { + 0.750000, 0.562500, 0.421875, 0.316406, 0.237305, + 0.177979, 0.133484, 0.100113, 0.075085, 0.056314 +}; + +const float ff_pow_0_55[10] = { + 0.550000, 0.302500, 0.166375, 0.091506, 0.050328, + 0.027681, 0.015224, 0.008373, 0.004605, 0.002533 +}; + +const float ff_b60_sinc[61] = { + 0.898529 , 0.865051 , 0.769257 , 0.624054 , 0.448639 , 0.265289 , + 0.0959167 , -0.0412598 , -0.134338 , -0.178986 , -0.178528 , -0.142609 , +-0.0849304 , -0.0205078 , 0.0369568 , 0.0773926 , 0.0955200 , 0.0912781 , + 0.0689392 , 0.0357056 , 0. , -0.0305481 , -0.0504150 , -0.0570068 , +-0.0508423 , -0.0350037 , -0.0141602 , 0.00665283, 0.0230713 , 0.0323486 , + 0.0335388 , 0.0275879 , 0.0167847 , 0.00411987, -0.00747681, -0.0156860 , +-0.0193481 , -0.0183716 , -0.0137634 , -0.00704956, 0. , 0.00582886 , + 0.00939941, 0.0103760 , 0.00903320, 0.00604248, 0.00238037, -0.00109863 , +-0.00366211, -0.00497437, -0.00503540, -0.00402832, -0.00241089, -0.000579834, + 0.00103760, 0.00222778, 0.00277710, 0.00271606, 0.00213623, 0.00115967 , + 0. +}; + +void ff_acelp_fc_pulse_per_track( + int16_t* fc_v, + const uint8_t *tab1, + const uint8_t *tab2, + int pulse_indexes, + int pulse_signs, + int pulse_count, + int bits) +{ + int mask = (1 << bits) - 1; + int i; + + for(i=0; i<pulse_count; i++) + { + fc_v[i + tab1[pulse_indexes & mask]] += + (pulse_signs & 1) ? 8191 : -8192; // +/-1 in (2.13) + + pulse_indexes >>= bits; + pulse_signs >>= 1; + } + + fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192; +} + +void ff_decode_10_pulses_35bits(const int16_t *fixed_index, + AMRFixed *fixed_sparse, + const uint8_t *gray_decode, + int half_pulse_count, int bits) +{ + int i; + int mask = (1 << bits) - 1; + + fixed_sparse->no_repeat_mask = 0; + fixed_sparse->n = 2 * half_pulse_count; + for (i = 0; i < half_pulse_count; i++) { + const int pos1 = gray_decode[fixed_index[2*i+1] & mask] + i; + const int pos2 = gray_decode[fixed_index[2*i ] & mask] + i; + const float sign = (fixed_index[2*i+1] & (1 << bits)) ? -1.0 : 1.0; + fixed_sparse->x[2*i+1] = pos1; + fixed_sparse->x[2*i ] = pos2; + fixed_sparse->y[2*i+1] = sign; + fixed_sparse->y[2*i ] = pos2 < pos1 ? -sign : sign; + } +} + +void ff_acelp_weighted_vector_sum( + int16_t* out, + const int16_t *in_a, + const int16_t *in_b, + int16_t weight_coeff_a, + int16_t weight_coeff_b, + int16_t rounder, + int shift, + int length) +{ + int i; + + // Clipping required here; breaks OVERFLOW test. + for(i=0; i<length; i++) + out[i] = av_clip_int16(( + in_a[i] * weight_coeff_a + + in_b[i] * weight_coeff_b + + rounder) >> shift); +} + +void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b, + float weight_coeff_a, float weight_coeff_b, int length) +{ + int i; + + for(i=0; i<length; i++) + out[i] = weight_coeff_a * in_a[i] + + weight_coeff_b * in_b[i]; +} + +void ff_adaptive_gain_control(float *out, const float *in, float speech_energ, + int size, float alpha, float *gain_mem) +{ + int i; + float postfilter_energ = avpriv_scalarproduct_float_c(in, in, size); + float gain_scale_factor = 1.0; + float mem = *gain_mem; + + if (postfilter_energ) + gain_scale_factor = sqrt(speech_energ / postfilter_energ); + + gain_scale_factor *= 1.0 - alpha; + + for (i = 0; i < size; i++) { + mem = alpha * mem + gain_scale_factor; + out[i] = in[i] * mem; + } + + *gain_mem = mem; +} + +void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in, + float sum_of_squares, const int n) +{ + int i; + float scalefactor = avpriv_scalarproduct_float_c(in, in, n); + if (scalefactor) + scalefactor = sqrt(sum_of_squares / scalefactor); + for (i = 0; i < n; i++) + out[i] = in[i] * scalefactor; +} + +void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size) +{ + int i; + + for (i=0; i < in->n; i++) { + int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1); + float y = in->y[i] * scale; + + if (in->pitch_lag > 0) + do { + out[x] += y; + y *= in->pitch_fac; + x += in->pitch_lag; + } while (x < size && repeats); + } +} + +void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size) +{ + int i; + + for (i=0; i < in->n; i++) { + int x = in->x[i], repeats = !((in->no_repeat_mask >> i) & 1); + + if (in->pitch_lag > 0) + do { + out[x] = 0.0; + x += in->pitch_lag; + } while (x < size && repeats); + } +} + +void ff_acelp_vectors_init(ACELPVContext *c) +{ + c->weighted_vector_sumf = ff_weighted_vector_sumf; + + if(HAVE_MIPSFPU) + ff_acelp_vectors_init_mips(c); +} |