GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/opus_celt.h Lines: 11 11 100.0 %
Date: 2021-04-18 10:33:33 Branches: 4 4 100.0 %

Line Branch Exec Source
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/*
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 * Opus decoder/demuxer common functions
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 * Copyright (c) 2012 Andrew D'Addesio
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 * Copyright (c) 2013-2014 Mozilla Corporation
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 * Copyright (c) 2016 Rostislav Pehlivanov <atomnuker@gmail.com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_OPUS_CELT_H
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#define AVCODEC_OPUS_CELT_H
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#include <float.h>
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#include "opus.h"
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#include "opus_pvq.h"
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#include "opusdsp.h"
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#include "mdct15.h"
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#include "libavutil/float_dsp.h"
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#include "libavutil/libm.h"
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#include "libavutil/mem_internal.h"
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#define CELT_VECTORS                 11
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#define CELT_ALLOC_STEPS             6
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#define CELT_FINE_OFFSET             21
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#define CELT_MAX_FINE_BITS           8
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#define CELT_NORM_SCALE              16384
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#define CELT_QTHETA_OFFSET           4
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#define CELT_QTHETA_OFFSET_TWOPHASE  16
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#define CELT_POSTFILTER_MINPERIOD    15
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#define CELT_ENERGY_SILENCE          (-28.0f)
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typedef struct CeltPVQ CeltPVQ;
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enum CeltSpread {
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    CELT_SPREAD_NONE,
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    CELT_SPREAD_LIGHT,
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    CELT_SPREAD_NORMAL,
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    CELT_SPREAD_AGGRESSIVE
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};
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enum CeltBlockSize {
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    CELT_BLOCK_120,
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    CELT_BLOCK_240,
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    CELT_BLOCK_480,
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    CELT_BLOCK_960,
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    CELT_BLOCK_NB
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};
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typedef struct CeltBlock {
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    float energy[CELT_MAX_BANDS];
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    float lin_energy[CELT_MAX_BANDS];
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    float error_energy[CELT_MAX_BANDS];
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    float prev_energy[2][CELT_MAX_BANDS];
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    uint8_t collapse_masks[CELT_MAX_BANDS];
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    /* buffer for mdct output + postfilter */
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    DECLARE_ALIGNED(32, float, buf)[2048];
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    DECLARE_ALIGNED(32, float, coeffs)[CELT_MAX_FRAME_SIZE];
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    /* Used by the encoder */
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    DECLARE_ALIGNED(32, float, overlap)[FFALIGN(CELT_OVERLAP, 16)];
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    DECLARE_ALIGNED(32, float, samples)[FFALIGN(CELT_MAX_FRAME_SIZE, 16)];
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    /* postfilter parameters */
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    int   pf_period_new;
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    float pf_gains_new[3];
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    int   pf_period;
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    float pf_gains[3];
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    int   pf_period_old;
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    float pf_gains_old[3];
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    float emph_coeff;
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} CeltBlock;
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struct CeltFrame {
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    // constant values that do not change during context lifetime
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    AVCodecContext      *avctx;
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    MDCT15Context       *imdct[4];
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    AVFloatDSPContext   *dsp;
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    CeltBlock           block[2];
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    CeltPVQ             *pvq;
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    OpusDSP             opusdsp;
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    int channels;
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    int output_channels;
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    int apply_phase_inv;
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    enum CeltBlockSize size;
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    int start_band;
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    int end_band;
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    int coded_bands;
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    int transient;
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    int pfilter;
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    int skip_band_floor;
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    int tf_select;
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    int alloc_trim;
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    int alloc_boost[CELT_MAX_BANDS];
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    int blocks;        /* number of iMDCT blocks in the frame, depends on transient */
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    int blocksize;     /* size of each block */
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    int silence;       /* Frame is filled with silence */
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    int anticollapse_needed; /* Whether to expect an anticollapse bit */
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    int anticollapse;  /* Encoded anticollapse bit */
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    int intensity_stereo;
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    int dual_stereo;
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    int flushed;
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    uint32_t seed;
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    enum CeltSpread spread;
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    /* Encoder PF coeffs */
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    int pf_octave;
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    int pf_period;
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    int pf_tapset;
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    float pf_gain;
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    /* Bit allocation */
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    int framebits;
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    int remaining;
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    int remaining2;
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    int caps         [CELT_MAX_BANDS];
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    int fine_bits    [CELT_MAX_BANDS];
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    int fine_priority[CELT_MAX_BANDS];
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    int pulses       [CELT_MAX_BANDS];
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    int tf_change    [CELT_MAX_BANDS];
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};
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/* LCG for noise generation */
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static av_always_inline uint32_t celt_rng(CeltFrame *f)
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{
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    f->seed = 1664525 * f->seed + 1013904223;
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    return f->seed;
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}
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static av_always_inline void celt_renormalize_vector(float *X, int N, float gain)
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{
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    int i;
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    float g = 1e-15f;
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    for (i = 0; i < N; i++)
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        g += X[i] * X[i];
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    g = gain / sqrtf(g);
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    for (i = 0; i < N; i++)
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        X[i] *= g;
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}
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int ff_celt_init(AVCodecContext *avctx, CeltFrame **f, int output_channels,
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                 int apply_phase_inv);
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void ff_celt_free(CeltFrame **f);
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void ff_celt_flush(CeltFrame *f);
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int ff_celt_decode_frame(CeltFrame *f, OpusRangeCoder *rc, float **output,
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                         int coded_channels, int frame_size, int startband, int endband);
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#endif /* AVCODEC_OPUS_CELT_H */