static int decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src,

                          int log2w, int log2h, int stride)

{

    const int index = size2index[log2h][log2w];

    const int h     = 1 << log2h;

    int code        = get_vlc2(&f->gb,

                               block_type_vlc[1 - (f->version > 1)][index].table,

                               BLOCK_TYPE_VLC_BITS, 1);

    uint16_t *start = (uint16_t *)f->last_picture->data[0];

    uint16_t *end   = start + stride * (f->avctx->height - h + 1) - (1 << log2w);

    int ret;



    if (code < 0 || code > 6 || log2w < 0)

        return AVERROR_INVALIDDATA;



    if (code == 0) {

        src += f->mv[bytestream2_get_byte(&f->g)];

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 1, 0);

    } else if (code == 1) {

        log2h--;

        if ((ret = decode_p_block(f, dst, src, log2w, log2h, stride)) < 0)

            return ret;

        if ((ret = decode_p_block(f, dst + (stride << log2h),

                                  src + (stride << log2h),

                                  log2w, log2h, stride)) < 0)

            return ret;

    } else if (code == 2) {

        log2w--;

        if ((ret = decode_p_block(f, dst , src, log2w, log2h, stride)) < 0)

            return ret;

        if ((ret = decode_p_block(f, dst + (1 << log2w),

                                  src + (1 << log2w),

                                  log2w, log2h, stride)) < 0)

            return ret;

    } else if (code == 3 && f->version < 2) {

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 1, 0);

    } else if (code == 4) {

        src += f->mv[bytestream2_get_byte(&f->g)];

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 1, bytestream2_get_le16(&f->g2));

    } else if (code == 5) {

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 0, bytestream2_get_le16(&f->g2));

    } else if (code == 6) {

        if (log2w) {

            dst[0]      = bytestream2_get_le16(&f->g2);

            dst[1]      = bytestream2_get_le16(&f->g2);

        } else {

            dst[0]      = bytestream2_get_le16(&f->g2);

            dst[stride] = bytestream2_get_le16(&f->g2);

        }

    }

    return 0;

}

static int decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src,

                          int log2w, int log2h, int stride)

{

    const int index = size2index[log2h][log2w];

    const int h     = 1 << log2h;

    int code        = get_vlc2(&f->gb,

                               block_type_vlc[1 - (f->version > 1)][index].table,

                               BLOCK_TYPE_VLC_BITS, 1);

    uint16_t *start = (uint16_t *)f->last_picture->data[0];

    uint16_t *end   = start + stride * (f->avctx->height - h + 1) - (1 << log2w);

    int ret;



    if (code < 0 || code > 6 || log2w < 0)

        return AVERROR_INVALIDDATA;



    if (code == 0) {

        src += f->mv[bytestream2_get_byte(&f->g)];

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 1, 0);

    } else if (code == 1) {

        log2h--;

        if ((ret = decode_p_block(f, dst, src, log2w, log2h, stride)) < 0)

            return ret;

        if ((ret = decode_p_block(f, dst + (stride << log2h),

                                  src + (stride << log2h),

                                  log2w, log2h, stride)) < 0)

            return ret;

    } else if (code == 2) {

        log2w--;

        if ((ret = decode_p_block(f, dst , src, log2w, log2h, stride)) < 0)

            return ret;

        if ((ret = decode_p_block(f, dst + (1 << log2w),

                                  src + (1 << log2w),

                                  log2w, log2h, stride)) < 0)

            return ret;

    } else if (code == 3 && f->version < 2) {

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 1, 0);

    } else if (code == 4) {

        src += f->mv[bytestream2_get_byte(&f->g)];

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 1, bytestream2_get_le16(&f->g2));

    } else if (code == 5) {

        if (start > src || src > end) {

            av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(dst, src, log2w, h, stride, 0, bytestream2_get_le16(&f->g2));

    } else if (code == 6) {

        if (log2w) {

            dst[0]      = bytestream2_get_le16(&f->g2);

            dst[1]      = bytestream2_get_le16(&f->g2);

        } else {

            dst[0]      = bytestream2_get_le16(&f->g2);

            dst[stride] = bytestream2_get_le16(&f->g2);

        }

    }

    return 0;

}

    if (code == 0) {         src += f->mv[bytestream2_get_byte(&f->g)];         if (start > src || src > end) {             av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");             return AVERROR_INVALIDDATA;         mcdc(dst, src, log2w, h, stride, 1, 0);     } else if (code == 1) {         if ((ret = decode_p_block(f, dst + (stride << log2h),                                   src + (stride << log2h),                                   log2w, log2h, stride)) < 0)             return ret;         if ((ret = decode_p_block(f, dst + (1 << log2w),                                   src + (1 << log2w),                                   log2w, log2h, stride)) < 0)             return ret;     } else if (code == 3 && f->version < 2) {         if (start > src || src > end) {             av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");             return AVERROR_INVALIDDATA;         mcdc(dst, src, log2w, h, stride, 1, 0);     } else if (code == 4) {         src += f->mv[bytestream2_get_byte(&f->g)];         if (start > src || src > end) {             av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");             return AVERROR_INVALIDDATA;         mcdc(dst, src, log2w, h, stride, 1, bytestream2_get_le16(&f->g2));     } else if (code == 5) {         if (start > src || src > end) {             av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");             return AVERROR_INVALIDDATA;         mcdc(dst, src, log2w, h, stride, 0, bytestream2_get_le16(&f->g2));
static int FUNC_0(FourXContext *VAR_0, uint16_t *VAR_1, uint16_t *VAR_2,

                          int VAR_3, int VAR_4, int VAR_5)

{

    const int VAR_6 = size2index[VAR_4][VAR_3];

    const int VAR_7     = 1 << VAR_4;

    int VAR_8        = get_vlc2(&VAR_0->gb,

                               block_type_vlc[1 - (VAR_0->version > 1)][VAR_6].table,

                               BLOCK_TYPE_VLC_BITS, 1);

    uint16_t *start = (uint16_t *)VAR_0->last_picture->data[0];

    uint16_t *end   = start + VAR_5 * (VAR_0->avctx->height - VAR_7 + 1) - (1 << VAR_3);

    int VAR_9;



    if (VAR_8 < 0 || VAR_8 > 6 || VAR_3 < 0)

        return AVERROR_INVALIDDATA;



    if (VAR_8 == 0) {

        VAR_2 += VAR_0->mv[bytestream2_get_byte(&VAR_0->g)];

        if (start > VAR_2 || VAR_2 > end) {

            av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 1, 0);

    } else if (VAR_8 == 1) {

        VAR_4--;

        if ((VAR_9 = FUNC_0(VAR_0, VAR_1, VAR_2, VAR_3, VAR_4, VAR_5)) < 0)

            return VAR_9;

        if ((VAR_9 = FUNC_0(VAR_0, VAR_1 + (VAR_5 << VAR_4),

                                  VAR_2 + (VAR_5 << VAR_4),

                                  VAR_3, VAR_4, VAR_5)) < 0)

            return VAR_9;

    } else if (VAR_8 == 2) {

        VAR_3--;

        if ((VAR_9 = FUNC_0(VAR_0, VAR_1 , VAR_2, VAR_3, VAR_4, VAR_5)) < 0)

            return VAR_9;

        if ((VAR_9 = FUNC_0(VAR_0, VAR_1 + (1 << VAR_3),

                                  VAR_2 + (1 << VAR_3),

                                  VAR_3, VAR_4, VAR_5)) < 0)

            return VAR_9;

    } else if (VAR_8 == 3 && VAR_0->version < 2) {

        if (start > VAR_2 || VAR_2 > end) {

            av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 1, 0);

    } else if (VAR_8 == 4) {

        VAR_2 += VAR_0->mv[bytestream2_get_byte(&VAR_0->g)];

        if (start > VAR_2 || VAR_2 > end) {

            av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 1, bytestream2_get_le16(&VAR_0->g2));

    } else if (VAR_8 == 5) {

        if (start > VAR_2 || VAR_2 > end) {

            av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n");

            return AVERROR_INVALIDDATA;

        }

        mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 0, bytestream2_get_le16(&VAR_0->g2));

    } else if (VAR_8 == 6) {

        if (VAR_3) {

            VAR_1[0]      = bytestream2_get_le16(&VAR_0->g2);

            VAR_1[1]      = bytestream2_get_le16(&VAR_0->g2);

        } else {

            VAR_1[0]      = bytestream2_get_le16(&VAR_0->g2);

            VAR_1[VAR_5] = bytestream2_get_le16(&VAR_0->g2);

        }

    }

    return 0;

}

static int FUNC_0(FourXContext *VAR_0, uint16_t *VAR_1, uint16_t *VAR_2,
int VAR_3, int VAR_4, int VAR_5)
{ const int VAR_6 = size2index[VAR_4][VAR_3]; const int VAR_7     = 1 << VAR_4; int VAR_8        = get_vlc2(&VAR_0->gb,
block_type_vlc[1 - (VAR_0->version > 1)][VAR_6].table,
BLOCK_TYPE_VLC_BITS, 1); uint16_t *start = (uint16_t *)VAR_0->last_picture->data[0]; uint16_t *end   = start + VAR_5 * (VAR_0->avctx->height - VAR_7 + 1) - (1 << VAR_3); int VAR_9; if (VAR_8 < 0 || VAR_8 > 6 || VAR_3 < 0)
return AVERROR_INVALIDDATA; if (VAR_8 == 0) { VAR_2 += VAR_0->mv[bytestream2_get_byte(&VAR_0->g)]; if (start > VAR_2 || VAR_2 > end) { av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n"); return AVERROR_INVALIDDATA; } mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 1, 0); } else if (VAR_8 == 1) { VAR_4--; if ((VAR_9 = FUNC_0(VAR_0, VAR_1, VAR_2, VAR_3, VAR_4, VAR_5)) < 0)
return VAR_9; if ((VAR_9 = FUNC_0(VAR_0, VAR_1 + (VAR_5 << VAR_4),
VAR_2 + (VAR_5 << VAR_4),
VAR_3, VAR_4, VAR_5)) < 0)
return VAR_9; } else if (VAR_8 == 2) { VAR_3--; if ((VAR_9 = FUNC_0(VAR_0, VAR_1 , VAR_2, VAR_3, VAR_4, VAR_5)) < 0)
return VAR_9; if ((VAR_9 = FUNC_0(VAR_0, VAR_1 + (1 << VAR_3),
VAR_2 + (1 << VAR_3),
VAR_3, VAR_4, VAR_5)) < 0)
return VAR_9; } else if (VAR_8 == 3 && VAR_0->version < 2) { if (start > VAR_2 || VAR_2 > end) { av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n"); return AVERROR_INVALIDDATA; } mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 1, 0); } else if (VAR_8 == 4) { VAR_2 += VAR_0->mv[bytestream2_get_byte(&VAR_0->g)]; if (start > VAR_2 || VAR_2 > end) { av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n"); return AVERROR_INVALIDDATA; } mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 1, bytestream2_get_le16(&VAR_0->g2)); } else if (VAR_8 == 5) { if (start > VAR_2 || VAR_2 > end) { av_log(VAR_0->avctx, AV_LOG_ERROR, "mv out of pic\n"); return AVERROR_INVALIDDATA; } mcdc(VAR_1, VAR_2, VAR_3, VAR_7, VAR_5, 0, bytestream2_get_le16(&VAR_0->g2)); } else if (VAR_8 == 6) { if (VAR_3) { VAR_1[0]      = bytestream2_get_le16(&VAR_0->g2); VAR_1[1]      = bytestream2_get_le16(&VAR_0->g2); } else { VAR_1[0]      = bytestream2_get_le16(&VAR_0->g2); VAR_1[VAR_5] = bytestream2_get_le16(&VAR_0->g2); } } return 0; }