From fb26f52697f1bb215375b4acaa626ff36d8d4208 Mon Sep 17 00:00:00 2001 From: Mohamed Tarek Date: Sat, 7 Aug 2010 13:06:05 +0000 Subject: Add missing files from ffmpeg, write a README.rockbox and a makefile. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27742 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libwmavoice/acelp_vectors.h | 264 ++++++++++++++++++++++++++++++++ 1 file changed, 264 insertions(+) create mode 100644 apps/codecs/libwmavoice/acelp_vectors.h (limited to 'apps/codecs/libwmavoice/acelp_vectors.h') diff --git a/apps/codecs/libwmavoice/acelp_vectors.h b/apps/codecs/libwmavoice/acelp_vectors.h new file mode 100644 index 0000000000..f3bc781446 --- /dev/null +++ b/apps/codecs/libwmavoice/acelp_vectors.h @@ -0,0 +1,264 @@ +/* + * 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 + */ + +#ifndef AVCODEC_ACELP_VECTORS_H +#define AVCODEC_ACELP_VECTORS_H + +#include + +/** Sparse representation for the algebraic codebook (fixed) vector */ +typedef struct { + int n; + int x[10]; + float y[10]; + int no_repeat_mask; + int pitch_lag; + float pitch_fac; +} AMRFixed; + +/** + * Track|Pulse| Positions + * ------------------------------------------------------------------------- + * 1 | 0 | 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 + * ------------------------------------------------------------------------- + * 2 | 1 | 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76 + * ------------------------------------------------------------------------- + * 3 | 2 | 2, 7, 12, 17, 22, 27, 32, 37, 42, 47, 52, 57, 62, 67, 72, 77 + * ------------------------------------------------------------------------- + * + * Table contains only first the pulse indexes. + * + * Used in G.729 @@8k, G.729 @@4.4k, AMR @@7.95k, AMR @@7.40k + */ +extern const uint8_t ff_fc_4pulses_8bits_tracks_13[16]; + +/** + * Track|Pulse| Positions + * ------------------------------------------------------------------------- + * 4 | 3 | 3, 8, 13, 18, 23, 28, 33, 38, 43, 48, 53, 58, 63, 68, 73, 78 + * | | 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79 + * ------------------------------------------------------------------------- + * + * @remark Track in the table should be read top-to-bottom, left-to-right. + * + * Used in G.729 @@8k, G.729 @@4.4k, AMR @@7.95k, AMR @@7.40k + */ +extern const uint8_t ff_fc_4pulses_8bits_track_4[32]; + +/** + * Track|Pulse| Positions + * ----------------------------------------- + * 1 | 0 | 1, 6, 11, 16, 21, 26, 31, 36 + * | | 3, 8, 13, 18, 23, 28, 33, 38 + * ----------------------------------------- + * + * @remark Track in the table should be read top-to-bottom, left-to-right. + * + * @note (EE) Reference G.729D code also uses gray decoding for each + * pulse index before looking up the value in the table. + * + * Used in G.729 @@6.4k (with gray coding), AMR @@5.9k (without gray coding) + */ +extern const uint8_t ff_fc_2pulses_9bits_track1[16]; +extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16]; + +/** + * Track|Pulse| Positions + * ----------------------------------------- + * 2 | 1 | 0, 7, 14, 20, 27, 34, 1, 21 + * | | 2, 9, 15, 22, 29, 35, 6, 26 + * | | 4,10, 17, 24, 30, 37, 11, 31 + * | | 5,12, 19, 25, 32, 39, 16, 36 + * ----------------------------------------- + * + * @remark Track in the table should be read top-to-bottom, left-to-right. + * + * @note (EE.1) This table (from the reference code) does not comply with + * the specification. + * The specification contains the following table: + * + * Track|Pulse| Positions + * ----------------------------------------- + * 2 | 1 | 0, 5, 10, 15, 20, 25, 30, 35 + * | | 1, 6, 11, 16, 21, 26, 31, 36 + * | | 2, 7, 12, 17, 22, 27, 32, 37 + * | | 4, 9, 14, 19, 24, 29, 34, 39 + * + * ----------------------------------------- + * + * @note (EE.2) Reference G.729D code also uses gray decoding for each + * pulse index before looking up the value in the table. + * + * Used in G.729 @@6.4k (with gray coding) + */ +extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32]; + +/** + * b60 hamming windowed sinc function coefficients + */ +extern const float ff_b60_sinc[61]; + +/** + * Table of pow(0.7,n) + */ +extern const float ff_pow_0_7[10]; + +/** + * Table of pow(0.75,n) + */ +extern const float ff_pow_0_75[10]; + +/** + * Table of pow(0.55,n) + */ +extern const float ff_pow_0_55[10]; + +/** + * Decode fixed-codebook vector (3.8 and D.5.8 of G.729, 5.7.1 of AMR). + * @param[out] fc_v decoded fixed codebook vector (2.13) + * @param tab1 table used for first pulse_count pulses + * @param tab2 table used for last pulse + * @param pulse_indexes fixed codebook indexes + * @param pulse_signs signs of the excitation pulses (0 bit value + * means negative sign) + * @param bits number of bits per one pulse index + * @param pulse_count number of pulses decoded using first table + * @param bits length of one pulse index in bits + * + * Used in G.729 @@8k, G.729 @@4.4k, G.729 @@6.4k, AMR @@7.95k, AMR @@7.40k + */ +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); + +/** + * Decode the algebraic codebook index to pulse positions and signs and + * construct the algebraic codebook vector for MODE_12k2. + * + * @note: The positions and signs are explicitly coded in MODE_12k2. + * + * @param fixed_index positions of the ten pulses + * @param fixed_sparse pointer to the algebraic codebook vector + * @param gray_decode gray decoding table + * @param half_pulse_count number of couples of pulses + * @param bits length of one pulse index in bits + */ +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); + + +/** + * weighted sum of two vectors with rounding. + * @param[out] out result of addition + * @param in_a first vector + * @param in_b second vector + * @param weight_coeff_a first vector weight coefficient + * @param weight_coeff_a second vector weight coefficient + * @param rounder this value will be added to the sum of the two vectors + * @param shift result will be shifted to right by this value + * @param length vectors length + * + * @note It is safe to pass the same buffer for out and in_a or in_b. + * + * out[i] = (in_a[i]*weight_a + in_b[i]*weight_b + rounder) >> shift + */ +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); + +/** + * float implementation of weighted sum of two vectors. + * @param[out] out result of addition + * @param in_a first vector + * @param in_b second vector + * @param weight_coeff_a first vector weight coefficient + * @param weight_coeff_a second vector weight coefficient + * @param length vectors length + * + * @note It is safe to pass the same buffer for out and in_a or in_b. + */ +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); + +/** + * Adaptive gain control (as used in AMR postfiltering) + * + * @param out output buffer for filtered speech data + * @param in the input speech buffer (may be the same as out) + * @param speech_energ input energy + * @param size the input buffer size + * @param alpha exponential filter factor + * @param gain_mem a pointer to the filter memory (single float of size) + */ +void ff_adaptive_gain_control(float *out, const float *in, float speech_energ, + int size, float alpha, float *gain_mem); + +/** + * Set the sum of squares of a signal by scaling + * + * @param out output samples + * @param in input samples + * @param sum_of_squares new sum of squares + * @param n number of samples + * + * @note If the input is zero (or its energy underflows), the output is zero. + * This is the behavior of AGC in the AMR reference decoder. The QCELP + * reference decoder seems to have undefined behavior. + * + * TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6 + * 3GPP TS 26.090 6.1 (6) + */ +void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in, + float sum_of_squares, const int n); + +/** + * Add fixed vector to an array from a sparse representation + * + * @param out fixed vector with pitch sharpening + * @param in sparse fixed vector + * @param scale number to multiply the fixed vector by + * @param size the output vector size + */ +void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size); + +/** + * Clear array values set by set_fixed_vector + * + * @param out fixed vector to be cleared + * @param in sparse fixed vector + * @param size the output vector size + */ +void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size); + +#endif /* AVCODEC_ACELP_VECTORS_H */ -- cgit v1.2.3