repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * SIPR / ACELP.NET decoder | |
| 3 | * | |
| 4 | * Copyright (c) 2008 Vladimir Voroshilov | |
| 5 | * Copyright (c) 2009 Vitor Sessak | |
| 6 | * | |
| 7 | * This file is part of FFmpeg. | |
| 8 | * | |
| 9 | * FFmpeg is free software; you can redistribute it and/or | |
| 10 | * modify it under the terms of the GNU Lesser General Public | |
| 11 | * License as published by the Free Software Foundation; either | |
| 12 | * version 2.1 of the License, or (at your option) any later version. | |
| 13 | * | |
| 14 | * FFmpeg is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 | * Lesser General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public | |
| 20 | * License along with FFmpeg; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef AVCODEC_SIPR_H | |
| 25 | #define AVCODEC_SIPR_H | |
| 26 | ||
| 27 | #include "avcodec.h" | |
| 28 | #include "acelp_pitch_delay.h" | |
| 29 | #include "libavutil/mem.h" | |
| 30 | ||
| 31 | #define LP_FILTER_ORDER_16k 16 | |
| 32 | #define L_SUBFR_16k 80 | |
| 33 | #define PITCH_MIN 30 | |
| 34 | #define PITCH_MAX 281 | |
| 35 | ||
| 36 | #define LSFQ_DIFF_MIN (0.0125 * M_PI) | |
| 37 | ||
| 38 | #define LP_FILTER_ORDER 10 | |
| 39 | ||
| 40 | /** Number of past samples needed for excitation interpolation */ | |
| 41 | #define L_INTERPOL (LP_FILTER_ORDER + 1) | |
| 42 | ||
| 43 | /** Subframe size for all modes except 16k */ | |
| 44 | #define SUBFR_SIZE 48 | |
| 45 | ||
| 46 | #define SUBFRAME_COUNT_16k 2 | |
| 47 | ||
| 48 | typedef enum { | |
| 49 | MODE_16k, | |
| 50 | MODE_8k5, | |
| 51 | MODE_6k5, | |
| 52 | MODE_5k0, | |
| 53 | MODE_COUNT | |
| 54 | } SiprMode; | |
| 55 | ||
| 56 | typedef struct SiprParameters { | |
| 57 | int ma_pred_switch; ///< switched moving average predictor | |
| 58 | int vq_indexes[5]; | |
| 59 | int pitch_delay[5]; ///< pitch delay | |
| 60 | int gp_index[5]; ///< adaptive-codebook gain indexes | |
| 61 | int16_t fc_indexes[5][10]; ///< fixed-codebook indexes | |
| 62 | int gc_index[5]; ///< fixed-codebook gain indexes | |
| 63 | } SiprParameters; | |
| 64 | ||
| 65 | typedef struct SiprContext { | |
| 66 | AVCodecContext *avctx; | |
| 67 | ||
| 68 | SiprMode mode; | |
| 69 | ||
| 70 | float past_pitch_gain; | |
| 71 | float lsf_history[LP_FILTER_ORDER_16k]; | |
| 72 | ||
| 73 | float excitation[L_INTERPOL + PITCH_MAX + 2 * L_SUBFR_16k]; | |
| 74 | ||
| 75 | DECLARE_ALIGNED(16, float, synth_buf)[LP_FILTER_ORDER + 5*SUBFR_SIZE + 6]; | |
| 76 | ||
| 77 | float lsp_history[LP_FILTER_ORDER]; | |
| 78 | float gain_mem; | |
| 79 | float energy_history[4]; | |
| 80 | float highpass_filt_mem[2]; | |
| 81 | float postfilter_mem[PITCH_DELAY_MAX + LP_FILTER_ORDER]; | |
| 82 | ||
| 83 | /* 5k0 */ | |
| 84 | float tilt_mem; | |
| 85 | float postfilter_agc; | |
| 86 | float postfilter_mem5k0[PITCH_DELAY_MAX + LP_FILTER_ORDER]; | |
| 87 | float postfilter_syn5k0[LP_FILTER_ORDER + SUBFR_SIZE*5]; | |
| 88 | ||
| 89 | /* 16k */ | |
| 90 | int pitch_lag_prev; | |
| 91 | float iir_mem[LP_FILTER_ORDER_16k+1]; | |
| 92 | float filt_buf[2][LP_FILTER_ORDER_16k+1]; | |
| 93 | float *filt_mem[2]; | |
| 94 | float mem_preemph[LP_FILTER_ORDER_16k]; | |
| 95 | float synth[LP_FILTER_ORDER_16k]; | |
| 96 | double lsp_history_16k[16]; | |
| 97 | ||
| 98 | void (*decode_frame)(struct SiprContext *ctx, SiprParameters *params, | |
| 99 | float *out_data); | |
| 100 | } SiprContext; | |
| 101 | ||
| 102 | extern const float ff_pow_0_5[16]; | |
| 103 | ||
| 104 | void ff_sipr_init_16k(SiprContext *ctx); | |
| 105 | ||
| 106 | void ff_sipr_decode_frame_16k(SiprContext *ctx, SiprParameters *params, | |
| 107 | float *out_data); | |
| 108 | ||
| 109 | #endif /* AVCODEC_SIPR_H */ |