GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dv.c Lines: 97 108 89.8 %
Date: 2019-11-18 18:00:01 Branches: 48 55 87.3 %

Line Branch Exec Source
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/*
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 * DV decoder
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 * Copyright (c) 2002 Fabrice Bellard
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 * Copyright (c) 2004 Roman Shaposhnik
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 *
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 * DV encoder
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 * Copyright (c) 2003 Roman Shaposhnik
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 *
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 * 50 Mbps (DVCPRO50) support
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 * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
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 *
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 * 100 Mbps (DVCPRO HD) support
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 * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
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 * Final code by Roman Shaposhnik
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 *
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 * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
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 * of DV technical info.
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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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/**
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 * @file
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 * DV codec.
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 */
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#include "libavutil/internal.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "dv.h"
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#include "dvdata.h"
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#include "internal.h"
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#include "put_bits.h"
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#include "simple_idct.h"
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/* XXX: also include quantization */
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RL_VLC_ELEM ff_dv_rl_vlc[1664];
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54
42390
static inline void dv_calc_mb_coordinates(const AVDVProfile *d, int chan,
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                                          int seq, int slot, uint16_t *tbl)
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{
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    static const uint8_t off[]   = {  2,  6,  8, 0,  4 };
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    static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 };
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    static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 };
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    static const uint8_t shuf3[] = { 18,  9, 27, 0, 36 };
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    static const uint8_t l_start[]          = { 0, 4, 9, 13, 18, 22, 27, 31, 36, 40 };
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    static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 };
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    static const uint8_t serpent1[] = {
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        0, 1, 2, 2, 1, 0,
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        0, 1, 2, 2, 1, 0,
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        0, 1, 2, 2, 1, 0,
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        0, 1, 2, 2, 1, 0,
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        0, 1, 2
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    };
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    static const uint8_t serpent2[] = {
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        0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
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        0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0,
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        0, 1, 2, 3, 4, 5
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    };
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    static const uint8_t remap[][2] = {
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        {  0,  0 }, {  0,  0 }, {  0,  0 }, {  0,  0 }, /* dummy */
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        {  0,  0 }, {  0,  1 }, {  0,  2 }, {  0,  3 }, { 10,  0 },
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        { 10,  1 }, { 10,  2 }, { 10,  3 }, { 20,  0 }, { 20,  1 },
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        { 20,  2 }, { 20,  3 }, { 30,  0 }, { 30,  1 }, { 30,  2 },
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        { 30,  3 }, { 40,  0 }, { 40,  1 }, { 40,  2 }, { 40,  3 },
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        { 50,  0 }, { 50,  1 }, { 50,  2 }, { 50,  3 }, { 60,  0 },
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        { 60,  1 }, { 60,  2 }, { 60,  3 }, { 70,  0 }, { 70,  1 },
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        { 70,  2 }, { 70,  3 }, {  0, 64 }, {  0, 65 }, {  0, 66 },
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        { 10, 64 }, { 10, 65 }, { 10, 66 }, { 20, 64 }, { 20, 65 },
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        { 20, 66 }, { 30, 64 }, { 30, 65 }, { 30, 66 }, { 40, 64 },
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        { 40, 65 }, { 40, 66 }, { 50, 64 }, { 50, 65 }, { 50, 66 },
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        { 60, 64 }, { 60, 65 }, { 60, 66 }, { 70, 64 }, { 70, 65 },
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        { 70, 66 }, {  0, 67 }, { 20, 67 }, { 40, 67 }, { 60, 67 }
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    };
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    int i, k, m;
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    int x, y, blk;
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254340
    for (m = 0; m < 5; m++) {
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211950
        switch (d->width) {
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72900
        case 1440:
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72900
            blk = (chan * 11 + seq) * 27 + slot;
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72900
            if (chan == 0 && seq == 11) {
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1620
                x = m * 27 + slot;
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1620
                if (x < 90) {
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1080
                    y = 0;
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                } else {
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540
                    x = (x - 90) * 2;
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540
                    y = 67;
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                }
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            } else {
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71280
                i = (4 * chan + blk + off[m]) % 11;
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71280
                k = (blk / 11) % 27;
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71280
                x = shuf1[m] + (chan & 1) * 9 + k % 9;
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71280
                y = (i * 3 + k / 9) * 2 + (chan >> 1) + 1;
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            }
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72900
            tbl[m] = (x << 1) | (y << 9);
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72900
            break;
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        case 1280:
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            blk = (chan * 10 + seq) * 27 + slot;
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            i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10;
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            k = (blk / 5) % 27;
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            x = shuf1[m] + (chan & 1) * 9 + k % 9;
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            y = (i * 3 + k / 9) * 2 + (chan >> 1) + 4;
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            if (x >= 80) {
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                x = remap[y][0] + ((x - 80) << (y > 59));
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                y = remap[y][1];
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            }
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            tbl[m] = (x << 1) | (y << 9);
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            break;
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32400
        case 960:
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32400
            blk = (chan * 10 + seq) * 27 + slot;
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32400
            i = (4 * chan + (seq / 5) + 2 * blk + off[m]) % 10;
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32400
            k = (blk / 5) % 27 + (i & 1) * 3;
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32400
            x      = shuf2[m]   + k % 6 +  6 * (chan  & 1);
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32400
            y      = l_start[i] + k / 6 + 45 * (chan >> 1);
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32400
            tbl[m] = (x << 1) | (y << 9);
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32400
            break;
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106650
        case 720:
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106650
            switch (d->pix_fmt) {
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45360
            case AV_PIX_FMT_YUV422P:
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45360
                x = shuf3[m] + slot / 3;
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45360
                y = serpent1[slot] +
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45360
                    ((((seq + off[m]) % d->difseg_size) << 1) + chan) * 3;
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45360
                tbl[m] = (x << 1) | (y << 8);
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45360
                break;
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35640
            case AV_PIX_FMT_YUV420P:
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35640
                x = shuf3[m] + slot / 3;
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35640
                y = serpent1[slot] +
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35640
                    ((seq + off[m]) % d->difseg_size) * 3;
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35640
                tbl[m] = (x << 1) | (y << 9);
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35640
                break;
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25650
            case AV_PIX_FMT_YUV411P:
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25650
                i = (seq + off[m]) % d->difseg_size;
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25650
                k = slot + ((m == 1 || m == 2) ? 3 : 0);
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162
25650
                x = l_start_shuffled[m] + k / 6;
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25650
                y = serpent2[k] + i * 6;
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25650
                if (x > 21)
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570
                    y = y * 2 - i * 6;
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25650
                tbl[m] = (x << 2) | (y << 8);
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25650
                break;
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            }
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106650
        default:
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106650
            break;
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        }
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    }
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42390
}
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175
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int ff_dv_init_dynamic_tables(DVVideoContext *ctx, const AVDVProfile *d)
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{
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    int j, i, c, s, p;
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    p = i = 0;
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216
    for (c = 0; c < d->n_difchan; c++) {
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1793
        for (s = 0; s < d->difseg_size; s++) {
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1654
            p += 6;
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46312
            for (j = 0; j < 27; j++) {
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44658
                p += !(j % 3);
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44658
                if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) &&
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43686
                    !(DV_PROFILE_IS_720p50(d) && s > 9)) {
187
42390
                    dv_calc_mb_coordinates(d, c, s, j, &ctx->work_chunks[i].mb_coordinates[0]);
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42390
                    ctx->work_chunks[i++].buf_offset = p;
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                }
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44658
                p += 5;
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            }
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        }
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    }
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    return 0;
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}
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av_cold int ff_dvvideo_init(AVCodecContext *avctx)
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{
200
79
    DVVideoContext *s = avctx->priv_data;
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    static int done = 0;
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    int i, j;
203
204
79
    if (!done) {
205
        VLC dv_vlc;
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        uint16_t  new_dv_vlc_bits[NB_DV_VLC * 2];
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        uint8_t    new_dv_vlc_len[NB_DV_VLC * 2];
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        uint8_t    new_dv_vlc_run[NB_DV_VLC * 2];
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        int16_t  new_dv_vlc_level[NB_DV_VLC * 2];
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211
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        done = 1;
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213
        /* it's faster to include sign bit in a generic VLC parsing scheme */
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22140
        for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) {
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22086
            new_dv_vlc_bits[j]  = ff_dv_vlc_bits[i];
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22086
            new_dv_vlc_len[j]   = ff_dv_vlc_len[i];
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22086
            new_dv_vlc_run[j]   = ff_dv_vlc_run[i];
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22086
            new_dv_vlc_level[j] = ff_dv_vlc_level[i];
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220
22086
            if (ff_dv_vlc_level[i]) {
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18198
                new_dv_vlc_bits[j] <<= 1;
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18198
                new_dv_vlc_len[j]++;
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224
18198
                j++;
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18198
                new_dv_vlc_bits[j]  = (ff_dv_vlc_bits[i] << 1) | 1;
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18198
                new_dv_vlc_len[j]   =  ff_dv_vlc_len[i] + 1;
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18198
                new_dv_vlc_run[j]   =  ff_dv_vlc_run[i];
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18198
                new_dv_vlc_level[j] = -ff_dv_vlc_level[i];
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            }
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        }
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232
        /* NOTE: as a trick, we use the fact the no codes are unused
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         * to accelerate the parsing of partial codes */
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54
        init_vlc(&dv_vlc, TEX_VLC_BITS, j, new_dv_vlc_len,
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                 1, 1, new_dv_vlc_bits, 2, 2, 0);
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        av_assert1(dv_vlc.table_size == 1664);
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238
89910
        for (i = 0; i < dv_vlc.table_size; i++) {
239
89856
            int code = dv_vlc.table[i][0];
240
89856
            int len  = dv_vlc.table[i][1];
241
            int level, run;
242
243
89856
            if (len < 0) { // more bits needed
244
1728
                run   = 0;
245
1728
                level = code;
246
            } else {
247
88128
                run   = new_dv_vlc_run[code] + 1;
248
88128
                level = new_dv_vlc_level[code];
249
            }
250
89856
            ff_dv_rl_vlc[i].len   = len;
251
89856
            ff_dv_rl_vlc[i].level = level;
252
89856
            ff_dv_rl_vlc[i].run   = run;
253
        }
254
54
        ff_free_vlc(&dv_vlc);
255
    }
256
257
79
    s->avctx = avctx;
258
79
    avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
259
260
79
    return 0;
261
}
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