making act segmenter

1 files changed, 0 insertions, 679 deletions

diff --git a/ffmpeg1/libavcodec/mss12.c b/ffmpeg1/libavcodec/mss12.c
deleted file mode 100644
index b522e4a..0000000
--- a/ffmpeg1/libavcodec/mss12.c
+++ /dev/null
@@ -1,679 +0,0 @@
-/*
- * Copyright (c) 2012 Konstantin Shishkov
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Common functions for Microsoft Screen 1 and 2
- */
-
-#include "libavutil/intfloat.h"
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "mss12.h"
-
-enum SplitMode {
-    SPLIT_VERT = 0,
-    SPLIT_HOR,
-    SPLIT_NONE
-};
-
-static const int sec_order_sizes[4] = { 1, 7, 6, 1 };
-
-enum ContextDirection {
-    TOP_LEFT = 0,
-    TOP,
-    TOP_RIGHT,
-    LEFT
-};
-
-static int model_calc_threshold(Model *m)
-{
-    int thr;
-
-    thr = 2 * m->weights[m->num_syms] - 1;
-    thr = ((thr >> 1) + 4 * m->cum_prob[0]) / thr;
-
-    return FFMIN(thr, 0x3FFF);
-}
-
-static void model_reset(Model *m)
-{
-    int i;
-
-    for (i = 0; i <= m->num_syms; i++) {
-        m->weights[i]  = 1;
-        m->cum_prob[i] = m->num_syms - i;
-    }
-    m->weights[0] = 0;
-    for (i = 0; i < m->num_syms; i++)
-        m->idx2sym[i + 1] = i;
-}
-
-static av_cold void model_init(Model *m, int num_syms, int thr_weight)
-{
-    m->num_syms   = num_syms;
-    m->thr_weight = thr_weight;
-    m->threshold  = num_syms * thr_weight;
-}
-
-static void model_rescale_weights(Model *m)
-{
-    int i;
-    int cum_prob;
-
-    if (m->thr_weight == THRESH_ADAPTIVE)
-        m->threshold = model_calc_threshold(m);
-    while (m->cum_prob[0] > m->threshold) {
-        cum_prob = 0;
-        for (i = m->num_syms; i >= 0; i--) {
-            m->cum_prob[i] = cum_prob;
-            m->weights[i]  = (m->weights[i] + 1) >> 1;
-            cum_prob      += m->weights[i];
-        }
-    }
-}
-
-void ff_mss12_model_update(Model *m, int val)
-{
-    int i;
-
-    if (m->weights[val] == m->weights[val - 1]) {
-        for (i = val; m->weights[i - 1] == m->weights[val]; i--);
-        if (i != val) {
-            int sym1, sym2;
-
-            sym1 = m->idx2sym[val];
-            sym2 = m->idx2sym[i];
-
-            m->idx2sym[val]  = sym2;
-            m->idx2sym[i]    = sym1;
-
-            val = i;
-        }
-    }
-    m->weights[val]++;
-    for (i = val - 1; i >= 0; i--)
-        m->cum_prob[i]++;
-    model_rescale_weights(m);
-}
-
-static void pixctx_reset(PixContext *ctx)
-{
-    int i, j;
-
-    if (!ctx->special_initial_cache)
-        for (i = 0; i < ctx->cache_size; i++)
-            ctx->cache[i] = i;
-    else {
-        ctx->cache[0] = 1;
-        ctx->cache[1] = 2;
-        ctx->cache[2] = 4;
-    }
-
-    model_reset(&ctx->cache_model);
-    model_reset(&ctx->full_model);
-
-    for (i = 0; i < 15; i++)
-        for (j = 0; j < 4; j++)
-            model_reset(&ctx->sec_models[i][j]);
-}
-
-static av_cold void pixctx_init(PixContext *ctx, int cache_size,
-                                int full_model_syms, int special_initial_cache)
-{
-    int i, j, k, idx;
-
-    ctx->cache_size            = cache_size + 4;
-    ctx->num_syms              = cache_size;
-    ctx->special_initial_cache = special_initial_cache;
-
-    model_init(&ctx->cache_model, ctx->num_syms + 1, THRESH_LOW);
-    model_init(&ctx->full_model, full_model_syms, THRESH_HIGH);
-
-    for (i = 0, idx = 0; i < 4; i++)
-        for (j = 0; j < sec_order_sizes[i]; j++, idx++)
-            for (k = 0; k < 4; k++)
-                model_init(&ctx->sec_models[idx][k], 2 + i,
-                           i ? THRESH_LOW : THRESH_ADAPTIVE);
-}
-
-static av_always_inline int decode_pixel(ArithCoder *acoder, PixContext *pctx,
-                                         uint8_t *ngb, int num_ngb, int any_ngb)
-{
-    int i, val, pix;
-
-    val = acoder->get_model_sym(acoder, &pctx->cache_model);
-    if (val < pctx->num_syms) {
-        if (any_ngb) {
-            int idx, j;
-
-            idx = 0;
-            for (i = 0; i < pctx->cache_size; i++) {
-                for (j = 0; j < num_ngb; j++)
-                    if (pctx->cache[i] == ngb[j])
-                        break;
-                if (j == num_ngb) {
-                    if (idx == val)
-                        break;
-                    idx++;
-                }
-            }
-            val = FFMIN(i, pctx->cache_size - 1);
-        }
-        pix = pctx->cache[val];
-    } else {
-        pix = acoder->get_model_sym(acoder, &pctx->full_model);
-        for (i = 0; i < pctx->cache_size - 1; i++)
-            if (pctx->cache[i] == pix)
-                break;
-        val = i;
-    }
-    if (val) {
-        for (i = val; i > 0; i--)
-            pctx->cache[i] = pctx->cache[i - 1];
-        pctx->cache[0] = pix;
-    }
-
-    return pix;
-}
-
-static int decode_pixel_in_context(ArithCoder *acoder, PixContext *pctx,
-                                   uint8_t *src, int stride, int x, int y,
-                                   int has_right)
-{
-    uint8_t neighbours[4];
-    uint8_t ref_pix[4];
-    int nlen;
-    int layer = 0, sub;
-    int pix;
-    int i, j;
-
-    if (!y) {
-        memset(neighbours, src[-1], 4);
-    } else {
-        neighbours[TOP] = src[-stride];
-        if (!x) {
-            neighbours[TOP_LEFT] = neighbours[LEFT] = neighbours[TOP];
-        } else {
-            neighbours[TOP_LEFT] = src[-stride - 1];
-            neighbours[    LEFT] = src[-1];
-        }
-        if (has_right)
-            neighbours[TOP_RIGHT] = src[-stride + 1];
-        else
-            neighbours[TOP_RIGHT] = neighbours[TOP];
-    }
-
-    sub = 0;
-    if (x >= 2 && src[-2] == neighbours[LEFT])
-        sub  = 1;
-    if (y >= 2 && src[-2 * stride] == neighbours[TOP])
-        sub |= 2;
-
-    nlen = 1;
-    ref_pix[0] = neighbours[0];
-    for (i = 1; i < 4; i++) {
-        for (j = 0; j < nlen; j++)
-            if (ref_pix[j] == neighbours[i])
-                break;
-        if (j == nlen)
-            ref_pix[nlen++] = neighbours[i];
-    }
-
-    switch (nlen) {
-    case 1:
-        layer = 0;
-        break;
-    case 2:
-        if (neighbours[TOP] == neighbours[TOP_LEFT]) {
-            if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT])
-                layer = 1;
-            else if (neighbours[LEFT] == neighbours[TOP_LEFT])
-                layer = 2;
-            else
-                layer = 3;
-        } else if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT]) {
-            if (neighbours[LEFT] == neighbours[TOP_LEFT])
-                layer = 4;
-            else
-                layer = 5;
-        } else if (neighbours[LEFT] == neighbours[TOP_LEFT]) {
-            layer = 6;
-        } else {
-            layer = 7;
-        }
-        break;
-    case 3:
-        if (neighbours[TOP] == neighbours[TOP_LEFT])
-            layer = 8;
-        else if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT])
-            layer = 9;
-        else if (neighbours[LEFT] == neighbours[TOP_LEFT])
-            layer = 10;
-        else if (neighbours[TOP_RIGHT] == neighbours[TOP])
-            layer = 11;
-        else if (neighbours[TOP] == neighbours[LEFT])
-            layer = 12;
-        else
-            layer = 13;
-        break;
-    case 4:
-        layer = 14;
-        break;
-    }
-
-    pix = acoder->get_model_sym(acoder,
-                                &pctx->sec_models[layer][sub]);
-    if (pix < nlen)
-        return ref_pix[pix];
-    else
-        return decode_pixel(acoder, pctx, ref_pix, nlen, 1);
-}
-
-static int decode_region(ArithCoder *acoder, uint8_t *dst, uint8_t *rgb_pic,
-                         int x, int y, int width, int height, int stride,
-                         int rgb_stride, PixContext *pctx, const uint32_t *pal)
-{
-    int i, j, p;
-    uint8_t *rgb_dst = rgb_pic + x * 3 + y * rgb_stride;
-
-    dst += x + y * stride;
-
-    for (j = 0; j < height; j++) {
-        for (i = 0; i < width; i++) {
-            if (!i && !j)
-                p = decode_pixel(acoder, pctx, NULL, 0, 0);
-            else
-                p = decode_pixel_in_context(acoder, pctx, dst + i, stride,
-                                            i, j, width - i - 1);
-            dst[i] = p;
-
-            if (rgb_pic)
-                AV_WB24(rgb_dst + i * 3, pal[p]);
-        }
-        dst     += stride;
-        rgb_dst += rgb_stride;
-    }
-
-    return 0;
-}
-
-static void copy_rectangles(MSS12Context const *c,
-                            int x, int y, int width, int height)
-{
-    int j;
-
-    if (c->last_rgb_pic)
-        for (j = y; j < y + height; j++) {
-            memcpy(c->rgb_pic      + j * c->rgb_stride + x * 3,
-                   c->last_rgb_pic + j * c->rgb_stride + x * 3,
-                   width * 3);
-            memcpy(c->pal_pic      + j * c->pal_stride + x,
-                   c->last_pal_pic + j * c->pal_stride + x,
-                   width);
-        }
-}
-
-static int motion_compensation(MSS12Context const *c,
-                               int x, int y, int width, int height)
-{
-    if (x + c->mvX < 0 || x + c->mvX + width  > c->avctx->width  ||
-        y + c->mvY < 0 || y + c->mvY + height > c->avctx->height ||
-        !c->rgb_pic)
-        return -1;
-    else {
-        uint8_t *dst     = c->pal_pic + x     + y * c->pal_stride;
-        uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * c->rgb_stride;
-        uint8_t *src;
-        uint8_t *rgb_src;
-        int j;
-        x += c->mvX;
-        y += c->mvY;
-        if (c->last_rgb_pic) {
-            src     = c->last_pal_pic + x +     y * c->pal_stride;
-            rgb_src = c->last_rgb_pic + x * 3 + y * c->rgb_stride;
-        } else {
-            src     = c->pal_pic + x     + y * c->pal_stride;
-            rgb_src = c->rgb_pic + x * 3 + y * c->rgb_stride;
-        }
-        for (j = 0; j < height; j++) {
-            memmove(dst, src, width);
-            memmove(rgb_dst, rgb_src, width * 3);
-            dst     += c->pal_stride;
-            src     += c->pal_stride;
-            rgb_dst += c->rgb_stride;
-            rgb_src += c->rgb_stride;
-        }
-    }
-    return 0;
-}
-
-static int decode_region_masked(MSS12Context const *c, ArithCoder *acoder,
-                                uint8_t *dst, int stride, uint8_t *mask,
-                                int mask_stride, int x, int y,
-                                int width, int height,
-                                PixContext *pctx)
-{
-    int i, j, p;
-    uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * c->rgb_stride;
-
-    dst  += x + y * stride;
-    mask += x + y * mask_stride;
-
-    for (j = 0; j < height; j++) {
-        for (i = 0; i < width; i++) {
-            if (c->avctx->err_recognition & AV_EF_EXPLODE &&
-                ( c->rgb_pic && mask[i] != 0x01 && mask[i] != 0x02 && mask[i] != 0x04 ||
-                 !c->rgb_pic && mask[i] != 0x80 && mask[i] != 0xFF))
-                return -1;
-
-            if (mask[i] == 0x02) {
-                copy_rectangles(c, x + i, y + j, 1, 1);
-            } else if (mask[i] == 0x04) {
-                if (motion_compensation(c, x + i, y + j, 1, 1))
-                    return -1;
-            } else if (mask[i] != 0x80) {
-                if (!i && !j)
-                    p = decode_pixel(acoder, pctx, NULL, 0, 0);
-                else
-                    p = decode_pixel_in_context(acoder, pctx, dst + i, stride,
-                                                i, j, width - i - 1);
-                dst[i] = p;
-                if (c->rgb_pic)
-                    AV_WB24(rgb_dst + i * 3, c->pal[p]);
-            }
-        }
-        dst     += stride;
-        mask    += mask_stride;
-        rgb_dst += c->rgb_stride;
-    }
-
-    return 0;
-}
-
-static av_cold void slicecontext_init(SliceContext *sc,
-                                      int version, int full_model_syms)
-{
-    model_init(&sc->intra_region, 2, THRESH_ADAPTIVE);
-    model_init(&sc->inter_region, 2, THRESH_ADAPTIVE);
-    model_init(&sc->split_mode,   3, THRESH_HIGH);
-    model_init(&sc->edge_mode,    2, THRESH_HIGH);
-    model_init(&sc->pivot,        3, THRESH_LOW);
-
-    pixctx_init(&sc->intra_pix_ctx, 8, full_model_syms, 0);
-
-    pixctx_init(&sc->inter_pix_ctx, version ? 3 : 2,
-                full_model_syms, version ? 1 : 0);
-}
-
-void ff_mss12_slicecontext_reset(SliceContext *sc)
-{
-    model_reset(&sc->intra_region);
-    model_reset(&sc->inter_region);
-    model_reset(&sc->split_mode);
-    model_reset(&sc->edge_mode);
-    model_reset(&sc->pivot);
-    pixctx_reset(&sc->intra_pix_ctx);
-    pixctx_reset(&sc->inter_pix_ctx);
-}
-
-static int decode_pivot(SliceContext *sc, ArithCoder *acoder, int base)
-{
-    int val, inv;
-
-    inv = acoder->get_model_sym(acoder, &sc->edge_mode);
-    val = acoder->get_model_sym(acoder, &sc->pivot) + 1;
-
-    if (val > 2) {
-        if ((base + 1) / 2 - 2 <= 0)
-            return -1;
-
-        val = acoder->get_number(acoder, (base + 1) / 2 - 2) + 3;
-    }
-
-    if ((unsigned)val >= base)
-        return -1;
-
-    return inv ? base - val : val;
-}
-
-static int decode_region_intra(SliceContext *sc, ArithCoder *acoder,
-                               int x, int y, int width, int height)
-{
-    MSS12Context const *c = sc->c;
-    int mode;
-
-    mode = acoder->get_model_sym(acoder, &sc->intra_region);
-
-    if (!mode) {
-        int i, j, pix, rgb_pix;
-        int stride       = c->pal_stride;
-        int rgb_stride   = c->rgb_stride;
-        uint8_t *dst     = c->pal_pic + x     + y * stride;
-        uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * rgb_stride;
-
-        pix     = decode_pixel(acoder, &sc->intra_pix_ctx, NULL, 0, 0);
-        rgb_pix = c->pal[pix];
-        for (i = 0; i < height; i++, dst += stride, rgb_dst += rgb_stride) {
-            memset(dst, pix, width);
-            if (c->rgb_pic)
-                for (j = 0; j < width * 3; j += 3)
-                    AV_WB24(rgb_dst + j, rgb_pix);
-        }
-    } else {
-        return decode_region(acoder, c->pal_pic, c->rgb_pic,
-                             x, y, width, height, c->pal_stride, c->rgb_stride,
-                             &sc->intra_pix_ctx, &c->pal[0]);
-    }
-
-    return 0;
-}
-
-static int decode_region_inter(SliceContext *sc, ArithCoder *acoder,
-                               int x, int y, int width, int height)
-{
-    MSS12Context const *c = sc->c;
-    int mode;
-
-    mode = acoder->get_model_sym(acoder, &sc->inter_region);
-
-    if (!mode) {
-        mode = decode_pixel(acoder, &sc->inter_pix_ctx, NULL, 0, 0);
-
-        if (c->avctx->err_recognition & AV_EF_EXPLODE &&
-            ( c->rgb_pic && mode != 0x01 && mode != 0x02 && mode != 0x04 ||
-             !c->rgb_pic && mode != 0x80 && mode != 0xFF))
-            return -1;
-
-        if (mode == 0x02)
-            copy_rectangles(c, x, y, width, height);
-        else if (mode == 0x04)
-            return motion_compensation(c, x, y, width, height);
-        else if (mode != 0x80)
-            return decode_region_intra(sc, acoder, x, y, width, height);
-    } else {
-        if (decode_region(acoder, c->mask, NULL,
-                          x, y, width, height, c->mask_stride, 0,
-                          &sc->inter_pix_ctx, &c->pal[0]) < 0)
-            return -1;
-        return decode_region_masked(c, acoder, c->pal_pic,
-                                    c->pal_stride, c->mask,
-                                    c->mask_stride,
-                                    x, y, width, height,
-                                    &sc->intra_pix_ctx);
-    }
-
-    return 0;
-}
-
-int ff_mss12_decode_rect(SliceContext *sc, ArithCoder *acoder,
-                         int x, int y, int width, int height)
-{
-    int mode, pivot;
-
-    mode = acoder->get_model_sym(acoder, &sc->split_mode);
-
-    switch (mode) {
-    case SPLIT_VERT:
-        if ((pivot = decode_pivot(sc, acoder, height)) < 1)
-            return -1;
-        if (ff_mss12_decode_rect(sc, acoder, x, y, width, pivot))
-            return -1;
-        if (ff_mss12_decode_rect(sc, acoder, x, y + pivot, width, height - pivot))
-            return -1;
-        break;
-    case SPLIT_HOR:
-        if ((pivot = decode_pivot(sc, acoder, width)) < 1)
-            return -1;
-        if (ff_mss12_decode_rect(sc, acoder, x, y, pivot, height))
-            return -1;
-        if (ff_mss12_decode_rect(sc, acoder, x + pivot, y, width - pivot, height))
-            return -1;
-        break;
-    case SPLIT_NONE:
-        if (sc->c->keyframe)
-            return decode_region_intra(sc, acoder, x, y, width, height);
-        else
-            return decode_region_inter(sc, acoder, x, y, width, height);
-    default:
-        return -1;
-    }
-
-    return 0;
-}
-
-av_cold int ff_mss12_decode_init(MSS12Context *c, int version,
-                                 SliceContext* sc1, SliceContext *sc2)
-{
-    AVCodecContext *avctx = c->avctx;
-    int i;
-
-    if (avctx->extradata_size < 52 + 256 * 3) {
-        av_log(avctx, AV_LOG_ERROR, "Insufficient extradata size %d\n",
-               avctx->extradata_size);
-        return AVERROR_INVALIDDATA;
-    }
-
-    if (AV_RB32(avctx->extradata) < avctx->extradata_size) {
-        av_log(avctx, AV_LOG_ERROR,
-               "Insufficient extradata size: expected %d got %d\n",
-               AV_RB32(avctx->extradata),
-               avctx->extradata_size);
-        return AVERROR_INVALIDDATA;
-    }
-
-    avctx->coded_width  = AV_RB32(avctx->extradata + 20);
-    avctx->coded_height = AV_RB32(avctx->extradata + 24);
-    if (avctx->coded_width > 4096 || avctx->coded_height > 4096) {
-        av_log(avctx, AV_LOG_ERROR, "Frame dimensions %dx%d too large",
-               avctx->coded_width, avctx->coded_height);
-        return AVERROR_INVALIDDATA;
-    }
-    if (avctx->coded_width < 1 || avctx->coded_height < 1) {
-        av_log(avctx, AV_LOG_ERROR, "Frame dimensions %dx%d too small",
-               avctx->coded_width, avctx->coded_height);
-        return AVERROR_INVALIDDATA;
-    }
-
-    av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d\n",
-           AV_RB32(avctx->extradata + 4), AV_RB32(avctx->extradata + 8));
-    if (version != AV_RB32(avctx->extradata + 4) > 1) {
-        av_log(avctx, AV_LOG_ERROR,
-               "Header version doesn't match codec tag\n");
-        return -1;
-    }
-
-    c->free_colours = AV_RB32(avctx->extradata + 48);
-    if ((unsigned)c->free_colours > 256) {
-        av_log(avctx, AV_LOG_ERROR,
-               "Incorrect number of changeable palette entries: %d\n",
-               c->free_colours);
-        return AVERROR_INVALIDDATA;
-    }
-    av_log(avctx, AV_LOG_DEBUG, "%d free colour(s)\n", c->free_colours);
-
-    av_log(avctx, AV_LOG_DEBUG, "Display dimensions %dx%d\n",
-           AV_RB32(avctx->extradata + 12), AV_RB32(avctx->extradata + 16));
-    av_log(avctx, AV_LOG_DEBUG, "Coded dimensions %dx%d\n",
-           avctx->coded_width, avctx->coded_height);
-    av_log(avctx, AV_LOG_DEBUG, "%g frames per second\n",
-           av_int2float(AV_RB32(avctx->extradata + 28)));
-    av_log(avctx, AV_LOG_DEBUG, "Bitrate %d bps\n",
-           AV_RB32(avctx->extradata + 32));
-    av_log(avctx, AV_LOG_DEBUG, "Max. lead time %g ms\n",
-           av_int2float(AV_RB32(avctx->extradata + 36)));
-    av_log(avctx, AV_LOG_DEBUG, "Max. lag time %g ms\n",
-           av_int2float(AV_RB32(avctx->extradata + 40)));
-    av_log(avctx, AV_LOG_DEBUG, "Max. seek time %g ms\n",
-           av_int2float(AV_RB32(avctx->extradata + 44)));
-
-    if (version) {
-        if (avctx->extradata_size < 60 + 256 * 3) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Insufficient extradata size %d for v2\n",
-                   avctx->extradata_size);
-            return AVERROR_INVALIDDATA;
-        }
-
-        c->slice_split = AV_RB32(avctx->extradata + 52);
-        av_log(avctx, AV_LOG_DEBUG, "Slice split %d\n", c->slice_split);
-
-        c->full_model_syms = AV_RB32(avctx->extradata + 56);
-        if (c->full_model_syms < 2 || c->full_model_syms > 256) {
-            av_log(avctx, AV_LOG_ERROR,
-                   "Incorrect number of used colours %d\n",
-                   c->full_model_syms);
-            return AVERROR_INVALIDDATA;
-        }
-        av_log(avctx, AV_LOG_DEBUG, "Used colours %d\n",
-               c->full_model_syms);
-    } else {
-        c->slice_split     = 0;
-        c->full_model_syms = 256;
-    }
-
-    for (i = 0; i < 256; i++)
-        c->pal[i] = 0xFFU << 24 | AV_RB24(avctx->extradata + 52 +
-                            (version ? 8 : 0) + i * 3);
-
-    c->mask_stride = FFALIGN(avctx->width, 16);
-    c->mask        = av_malloc(c->mask_stride * avctx->height);
-    if (!c->mask) {
-        av_log(avctx, AV_LOG_ERROR, "Cannot allocate mask plane\n");
-        return AVERROR(ENOMEM);
-    }
-
-    sc1->c = c;
-    slicecontext_init(sc1, version, c->full_model_syms);
-    if (c->slice_split) {
-        sc2->c = c;
-        slicecontext_init(sc2, version, c->full_model_syms);
-    }
-    c->corrupted = 1;
-
-    return 0;
-}
-
-av_cold int ff_mss12_decode_end(MSS12Context *c)
-{
-    av_freep(&c->mask);
-
-    return 0;
-}