GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/ffv1.c Lines: 110 122 90.2 %
Date: 2020-09-25 23:16:12 Branches: 51 66 77.3 %

Line Branch Exec Source
1
/*
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 * FFV1 codec for libavcodec
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 *
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 * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>
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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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 * FF Video Codec 1 (a lossless codec)
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 */
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#include "libavutil/attributes.h"
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#include "libavutil/avassert.h"
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#include "libavutil/crc.h"
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "rangecoder.h"
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#include "mathops.h"
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#include "ffv1.h"
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85
av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
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{
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85
    FFV1Context *s = avctx->priv_data;
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45

85
    if (!avctx->width || !avctx->height)
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        return AVERROR_INVALIDDATA;
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85
    s->avctx = avctx;
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85
    s->flags = avctx->flags;
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85
    s->picture.f = av_frame_alloc();
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85
    s->last_picture.f = av_frame_alloc();
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85
    if (!s->picture.f || !s->last_picture.f)
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        return AVERROR(ENOMEM);
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85
    s->width  = avctx->width;
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85
    s->height = avctx->height;
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    // defaults
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85
    s->num_h_slices = 1;
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85
    s->num_v_slices = 1;
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85
    return 0;
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}
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10104
av_cold int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
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{
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    int j, i;
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10104
    fs->plane_count  = f->plane_count;
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10104
    fs->transparency = f->transparency;
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30312
    for (j = 0; j < f->plane_count; j++) {
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20208
        PlaneContext *const p = &fs->plane[j];
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20208
        if (fs->ac != AC_GOLOMB_RICE) {
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9888
            if (!p->state)
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480
                p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
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                                     sizeof(uint8_t));
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9888
            if (!p->state)
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                return AVERROR(ENOMEM);
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        } else {
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10320
            if (!p->vlc_state) {
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520
                p->vlc_state = av_mallocz_array(p->context_count, sizeof(VlcState));
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520
                if (!p->vlc_state)
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                    return AVERROR(ENOMEM);
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213640
                for (i = 0; i < p->context_count; i++) {
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213120
                    p->vlc_state[i].error_sum = 4;
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213120
                    p->vlc_state[i].count     = 1;
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                }
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            }
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        }
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    }
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10104
    if (fs->ac == AC_RANGE_CUSTOM_TAB) {
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        //FIXME only redo if state_transition changed
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1265664
        for (j = 1; j < 256; j++) {
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1260720
            fs->c. one_state[      j] = f->state_transition[j];
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1260720
            fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
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        }
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    }
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10104
    return 0;
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}
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av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
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{
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    int i, ret;
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128
    for (i = 0; i < f->max_slice_count; i++) {
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100
        FFV1Context *fs = f->slice_context[i];
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100
        if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)
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            return AVERROR(ENOMEM);
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    }
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28
    return 0;
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}
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85
av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
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{
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85
    int i, max_slice_count = f->num_h_slices * f->num_v_slices;
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85
    av_assert0(max_slice_count > 0);
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389
    for (i = 0; i < max_slice_count;) {
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304
        int sx          = i % f->num_h_slices;
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304
        int sy          = i / f->num_h_slices;
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304
        int sxs         = f->avctx->width  *  sx      / f->num_h_slices;
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304
        int sxe         = f->avctx->width  * (sx + 1) / f->num_h_slices;
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304
        int sys         = f->avctx->height *  sy      / f->num_v_slices;
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304
        int sye         = f->avctx->height * (sy + 1) / f->num_v_slices;
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304
        FFV1Context *fs = av_mallocz(sizeof(*fs));
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304
        if (!fs)
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            goto memfail;
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304
        f->slice_context[i++] = fs;
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304
        memcpy(fs, f, sizeof(*fs));
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304
        memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));
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304
        fs->slice_width  = sxe - sxs;
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304
        fs->slice_height = sye - sys;
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304
        fs->slice_x      = sxs;
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304
        fs->slice_y      = sys;
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304
        fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
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                                      sizeof(*fs->sample_buffer));
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304
        fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES *
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                                        sizeof(*fs->sample_buffer32));
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304
        if (!fs->sample_buffer || !fs->sample_buffer32)
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            goto memfail;
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    }
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85
    f->max_slice_count = max_slice_count;
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85
    return 0;
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153
memfail:
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    f->max_slice_count = i;
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    return AVERROR(ENOMEM);
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}
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int ff_ffv1_allocate_initial_states(FFV1Context *f)
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{
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    int i;
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231
    for (i = 0; i < f->quant_table_count; i++) {
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154
        f->initial_states[i] = av_malloc_array(f->context_count[i],
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                                         sizeof(*f->initial_states[i]));
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154
        if (!f->initial_states[i])
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            return AVERROR(ENOMEM);
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        memset(f->initial_states[i], 128,
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154
               f->context_count[i] * sizeof(*f->initial_states[i]));
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    }
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77
    return 0;
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}
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1104
void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
174
{
175
    int i, j;
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177
3312
    for (i = 0; i < f->plane_count; i++) {
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2208
        PlaneContext *p = &fs->plane[i];
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2208
        p->interlace_bit_state[0] = 128;
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2208
        p->interlace_bit_state[1] = 128;
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2208
        if (fs->ac != AC_GOLOMB_RICE) {
184
1056
            if (f->initial_states[p->quant_table_index]) {
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1056
                memcpy(p->state, f->initial_states[p->quant_table_index],
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1056
                       CONTEXT_SIZE * p->context_count);
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            } else
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                memset(p->state, 128, CONTEXT_SIZE * p->context_count);
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        } else {
190
768384
            for (j = 0; j < p->context_count; j++) {
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767232
                p->vlc_state[j].drift     = 0;
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767232
                p->vlc_state[j].error_sum = 4;    //FFMAX((RANGE + 32)/64, 2);
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767232
                p->vlc_state[j].bias      = 0;
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767232
                p->vlc_state[j].count     = 1;
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            }
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        }
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    }
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1104
}
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85
av_cold int ff_ffv1_close(AVCodecContext *avctx)
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{
203
85
    FFV1Context *s = avctx->priv_data;
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    int i, j;
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206
85
    if (s->picture.f)
207
85
        ff_thread_release_buffer(avctx, &s->picture);
208
85
    av_frame_free(&s->picture.f);
209
210
85
    if (s->last_picture.f)
211
85
        ff_thread_release_buffer(avctx, &s->last_picture);
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85
    av_frame_free(&s->last_picture.f);
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214
389
    for (j = 0; j < s->max_slice_count; j++) {
215
304
        FFV1Context *fs = s->slice_context[j];
216
912
        for (i = 0; i < s->plane_count; i++) {
217
608
            PlaneContext *p = &fs->plane[i];
218
219
608
            av_freep(&p->state);
220
608
            av_freep(&p->vlc_state);
221
        }
222
304
        av_freep(&fs->sample_buffer);
223
304
        av_freep(&fs->sample_buffer32);
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    }
225
226
85
    av_freep(&avctx->stats_out);
227
239
    for (j = 0; j < s->quant_table_count; j++) {
228
154
        av_freep(&s->initial_states[j]);
229
746
        for (i = 0; i < s->max_slice_count; i++) {
230
592
            FFV1Context *sf = s->slice_context[i];
231
592
            av_freep(&sf->rc_stat2[j]);
232
        }
233
154
        av_freep(&s->rc_stat2[j]);
234
    }
235
236
389
    for (i = 0; i < s->max_slice_count; i++)
237
304
        av_freep(&s->slice_context[i]);
238
239
85
    return 0;
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}