X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Facelp_vectors.h;h=d6226bf020932c933a5a766d08ef3f3b88850df4;hb=383d96aa2229f644d9bd77b821ed3a309da5e9fc;hp=a5e71fc128766d2ccbf0fc8b5084d6807e020989;hpb=987903826b0dba2e134be200ac94be66b4a3acf1;p=ffmpeg diff --git a/libavcodec/acelp_vectors.h b/libavcodec/acelp_vectors.h index a5e71fc1287..d6226bf0209 100644 --- a/libavcodec/acelp_vectors.h +++ b/libavcodec/acelp_vectors.h @@ -3,20 +3,20 @@ * * Copyright (c) 2008 Vladimir Voroshilov * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -25,6 +25,16 @@ #include +/** 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 * ------------------------------------------------------------------------- @@ -37,7 +47,7 @@ * * Table contains only first the pulse indexes. * - * Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k + * 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]; @@ -50,7 +60,7 @@ extern const uint8_t ff_fc_4pulses_8bits_tracks_13[16]; * * @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 + * 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]; @@ -66,45 +76,34 @@ extern const uint8_t ff_fc_4pulses_8bits_track_4[32]; * @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) + * 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) + * b60 hamming windowed sinc function coefficients */ -extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32]; +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 fc_v [out] decoded fixed codebook vector (2.13) + * @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 @@ -114,20 +113,37 @@ extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32]; * @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 + * 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_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); +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[out] out result of addition * @param in_a first vector * @param in_b second vector * @param weight_coeff_a first vector weight coefficient @@ -140,14 +156,78 @@ void ff_acelp_fc_pulse_per_track( * * 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); +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 */