/* * 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 FFMPEG_ACELP_VECTORS_H #define FFMPEG_ACELP_VECTORS_H #include <stdint.h> /** * 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]; /** * 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 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); /** * 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); #endif /* FFMPEG_ACELP_VECTORS_H */