gfiber / vendor / opensource / ffmpeg / 3d15d128df6c42df883fe3aedbbd2ef50085217f / . / libavcodec / acelp_vectors.h

/* | |

* 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> | |

/** | |

* 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); | |

/** | |

* 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); | |

#endif /* AVCODEC_ACELP_VECTORS_H */ |