diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/acelp_vectors.h | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/acelp_vectors.h')
| -rw-r--r-- | ffmpeg1/libavcodec/acelp_vectors.h | 288 |
1 files changed, 0 insertions, 288 deletions
diff --git a/ffmpeg1/libavcodec/acelp_vectors.h b/ffmpeg1/libavcodec/acelp_vectors.h deleted file mode 100644 index fae834d..0000000 --- a/ffmpeg1/libavcodec/acelp_vectors.h +++ /dev/null @@ -1,288 +0,0 @@ -/* - * 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 <stdint.h> - -typedef struct ACELPVContext { - /** - * 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 (should be a multiple of two) - * - * @note It is safe to pass the same buffer for out and in_a or in_b. - */ - void (*weighted_vector_sumf)(float *out, const float *in_a, const float *in_b, - float weight_coeff_a, float weight_coeff_b, - int length); - -}ACELPVContext; - -/** - * Initialize ACELPVContext. - */ -void ff_acelp_vectors_init(ACELPVContext *c); -void ff_acelp_vectors_init_mips(ACELPVContext *c); - -/** Sparse representation for the algebraic codebook (fixed) vector */ -typedef struct AMRFixed { - 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 */ |
