GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/qdm2_tablegen.h Lines: 60 60 100.0 %
Date: 2021-01-22 05:18:52 Branches: 16 16 100.0 %

Line Branch Exec Source
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/*
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 * Header file for hardcoded QDM2 tables
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 *
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 * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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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_QDM2_TABLEGEN_H
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#define AVCODEC_QDM2_TABLEGEN_H
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#include <stdint.h>
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#include <math.h>
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#include "libavutil/attributes.h"
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#include "qdm2data.h"
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#define SOFTCLIP_THRESHOLD 27600
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#define HARDCLIP_THRESHOLD 35716
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#if CONFIG_HARDCODED_TABLES
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#define softclip_table_init()
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#define rnd_table_init()
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#define init_noise_samples()
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#define qdm2_init_vlc()
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#include "libavcodec/qdm2_tables.h"
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#else
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static uint16_t softclip_table[HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1];
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static float noise_table[4096 + 20];
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static uint8_t random_dequant_index[256][5];
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static uint8_t random_dequant_type24[128][3];
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static float noise_samples[128];
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1
static av_cold void softclip_table_init(void) {
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    int i;
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1
    double dfl = SOFTCLIP_THRESHOLD - 32767;
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1
    float delta = 1.0 / -dfl;
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8118
    for (i = 0; i < HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1; i++)
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8117
        softclip_table[i] = SOFTCLIP_THRESHOLD - ((int)(sin((float)i * delta) * dfl) & 0x0000FFFF);
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1
}
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// random generated table
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1
static av_cold void rnd_table_init(void) {
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    int i,j;
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    uint32_t ldw;
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1
    uint64_t random_seed = 0;
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1
    float delta = 1.0 / 16384.0;
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4097
    for(i = 0; i < 4096 ;i++) {
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4096
        random_seed = random_seed * 214013 + 2531011;
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4096
        noise_table[i] = (delta * (float)(((int32_t)random_seed >> 16) & 0x00007FFF)- 1.0) * 1.3;
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    }
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    for (i = 0; i < 256 ;i++) {
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        random_seed = 81;
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        ldw = i;
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1536
        for (j = 0; j < 5 ;j++) {
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1280
            random_dequant_index[i][j] = ldw / random_seed;
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1280
            ldw %= random_seed;
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1280
            random_seed /= 3;
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        }
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    }
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    for (i = 0; i < 128 ;i++) {
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        random_seed = 25;
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128
        ldw = i;
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512
        for (j = 0; j < 3 ;j++) {
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            random_dequant_type24[i][j] = ldw / random_seed;
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            ldw %= random_seed;
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            random_seed /= 5;
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        }
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    }
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1
}
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static av_cold void init_noise_samples(void) {
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    int i;
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    unsigned random_seed = 0;
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    float delta = 1.0 / 16384.0;
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    for (i = 0; i < 128;i++) {
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        random_seed = random_seed * 214013 + 2531011;
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        noise_samples[i] = (delta * (float)((random_seed >> 16) & 0x00007fff) - 1.0);
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    }
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1
}
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static VLC vlc_tab_level;
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static VLC vlc_tab_diff;
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static VLC vlc_tab_run;
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static VLC fft_level_exp_alt_vlc;
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static VLC fft_level_exp_vlc;
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static VLC fft_stereo_exp_vlc;
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static VLC fft_stereo_phase_vlc;
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static VLC vlc_tab_tone_level_idx_hi1;
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static VLC vlc_tab_tone_level_idx_mid;
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static VLC vlc_tab_tone_level_idx_hi2;
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static VLC vlc_tab_type30;
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static VLC vlc_tab_type34;
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static VLC vlc_tab_fft_tone_offset[5];
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static VLC_TYPE qdm2_table[3838][2];
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static av_cold void build_vlc(VLC *vlc, int nb_bits, int nb_codes,
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                              unsigned *offset, const uint8_t tab[][2])
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{
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    vlc->table           = &qdm2_table[*offset];
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    vlc->table_allocated = FF_ARRAY_ELEMS(qdm2_table) - *offset;
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    ff_init_vlc_from_lengths(vlc, nb_bits, nb_codes,
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                             &tab[0][1], 2, &tab[0][0], 2, 1,
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                             -1, INIT_VLC_STATIC_OVERLONG | INIT_VLC_LE, NULL);
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    *offset += vlc->table_size;
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}
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static av_cold void qdm2_init_vlc(void)
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{
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    const uint8_t (*tab)[2] = tab_fft_tone_offset;
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    unsigned offset = 0;
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    build_vlc(&vlc_tab_level, 8, 24, &offset, tab_level);
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1
    build_vlc(&vlc_tab_diff,  8, 33, &offset, tab_diff);
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    build_vlc(&vlc_tab_run,   5,  6, &offset, tab_run);
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    build_vlc(&fft_level_exp_alt_vlc, 8, 28, &offset, fft_level_exp_alt);
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    build_vlc(&fft_level_exp_vlc,     8, 20, &offset, fft_level_exp);
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    build_vlc(&fft_stereo_exp_vlc,   6, 7, &offset, fft_stereo_exp);
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    build_vlc(&fft_stereo_phase_vlc, 6, 9, &offset, fft_stereo_phase);
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    build_vlc(&vlc_tab_tone_level_idx_hi1, 8, 20, &offset, tab_tone_level_idx_hi1);
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    build_vlc(&vlc_tab_tone_level_idx_mid, 8, 13, &offset, tab_tone_level_idx_mid);
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    build_vlc(&vlc_tab_tone_level_idx_hi2, 8, 18, &offset, tab_tone_level_idx_hi2);
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    build_vlc(&vlc_tab_type30, 6,  9, &offset, tab_type30);
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    build_vlc(&vlc_tab_type34, 5, 10, &offset, tab_type34);
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    for (int i = 0; i < 5; i++) {
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        build_vlc(&vlc_tab_fft_tone_offset[i], 8, tab_fft_tone_offset_sizes[i],
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                  &offset, tab);
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        tab += tab_fft_tone_offset_sizes[i];
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    }
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1
}
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#endif /* CONFIG_HARDCODED_TABLES */
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#endif /* AVCODEC_QDM2_TABLEGEN_H */