void vp78_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *curframe,
                                    VP8Frame *prev_frame, int is_vp7)
{
    VP8Context *s = avctx->priv_data;
    int mb_x, mb_y;

    s->mv_bounds.mv_min.y = -MARGIN;
    s->mv_bounds.mv_max.y = ((s->mb_height - 1) << 6) + MARGIN;
    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
        VP8Macroblock *mb = s->macroblocks_base +
                            ((s->mb_width + 1) * (mb_y + 1) + 1);
        int mb_xy = mb_y * s->mb_width;

        AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED * 0x01010101);

        s->mv_bounds.mv_min.x = -MARGIN;
        s->mv_bounds.mv_max.x = ((s->mb_width - 1) << 6) + MARGIN;
        for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
            if (mb_y == 0)
                AV_WN32A((mb - s->mb_width - 1)->intra4x4_pred_mode_top,
                         DC_PRED * 0x01010101);
            decode_mb_mode(s, &s->mv_bounds, mb, mb_x, mb_y, curframe->seg_map->data + mb_xy,
                           prev_frame && prev_frame->seg_map ?
                           prev_frame->seg_map->data + mb_xy : NULL, 1, is_vp7);
            s->mv_bounds.mv_min.x -= 64;
            s->mv_bounds.mv_max.x -= 64;
        }
        s->mv_bounds.mv_min.y -= 64;
        s->mv_bounds.mv_max.y -= 64;
    }
}
void vp78_decode_mv_mb_modes(AVCodecContext *avctx, VP8Frame *curframe,
                                    VP8Frame *prev_frame, int is_vp7)
{
    VP8Context *s = avctx->priv_data;
    int mb_x, mb_y;

    s->mv_bounds.mv_min.y = -MARGIN;
    s->mv_bounds.mv_max.y = ((s->mb_height - 1) << 6) + MARGIN;
    for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
        VP8Macroblock *mb = s->macroblocks_base +
                            ((s->mb_width + 1) * (mb_y + 1) + 1);
        int mb_xy = mb_y * s->mb_width;

        AV_WN32A(s->intra4x4_pred_mode_left, DC_PRED * 0x01010101);

        s->mv_bounds.mv_min.x = -MARGIN;
        s->mv_bounds.mv_max.x = ((s->mb_width - 1) << 6) + MARGIN;
        for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
            if (mb_y == 0)
                AV_WN32A((mb - s->mb_width - 1)->intra4x4_pred_mode_top,
                         DC_PRED * 0x01010101);
            decode_mb_mode(s, &s->mv_bounds, mb, mb_x, mb_y, curframe->seg_map->data + mb_xy,
                           prev_frame && prev_frame->seg_map ?
                           prev_frame->seg_map->data + mb_xy : NULL, 1, is_vp7);
            s->mv_bounds.mv_min.x -= 64;
            s->mv_bounds.mv_max.x -= 64;
        }
        s->mv_bounds.mv_min.y -= 64;
        s->mv_bounds.mv_max.y -= 64;
    }
}