static av_always_inline void filter_mb_row(AVCodecContext *avctx, void *tdata,
                              int jobnr, int threadnr, int is_vp7)
{
    VP8Context *s = avctx->priv_data;
    VP8ThreadData *td = &s->thread_data[threadnr];
    int mb_x, mb_y = atomic_load(&td->thread_mb_pos) >> 16, num_jobs = s->num_jobs;
    AVFrame *curframe = s->curframe->tf.f;
    VP8Macroblock *mb;
    VP8ThreadData *prev_td, *next_td;
    uint8_t *dst[3] = {
        curframe->data[0] + 16 * mb_y * s->linesize,
        curframe->data[1] +  8 * mb_y * s->uvlinesize,
        curframe->data[2] +  8 * mb_y * s->uvlinesize
    };

    if (s->mb_layout == 1)
        mb = s->macroblocks_base + ((s->mb_width + 1) * (mb_y + 1) + 1);
    else
        mb = s->macroblocks + (s->mb_height - mb_y - 1) * 2;

    if (mb_y == 0)
        prev_td = td;
    else
        prev_td = &s->thread_data[(jobnr + num_jobs - 1) % num_jobs];
    if (mb_y == s->mb_height - 1)
        next_td = td;
    else
        next_td = &s->thread_data[(jobnr + 1) % num_jobs];

    for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb++) {
        VP8FilterStrength *f = &td->filter_strength[mb_x];
        if (prev_td != td)
            check_thread_pos(td, prev_td,
                             (mb_x + 1) + (s->mb_width + 3), mb_y - 1);
        if (next_td != td)
            if (next_td != &s->thread_data[0])
                check_thread_pos(td, next_td, mb_x + 1, mb_y + 1);

        if (num_jobs == 1) {
            if (s->filter.simple)
                backup_mb_border(s->top_border[mb_x + 1], dst[0],
                                 NULL, NULL, s->linesize, 0, 1);
            else
                backup_mb_border(s->top_border[mb_x + 1], dst[0],
                                 dst[1], dst[2], s->linesize, s->uvlinesize, 0);
        }

        if (s->filter.simple)
            filter_mb_simple(s, dst[0], f, mb_x, mb_y);
        else
            filter_mb(s, dst, f, mb_x, mb_y, is_vp7);
        dst[0] += 16;
        dst[1] += 8;
        dst[2] += 8;

        update_pos(td, mb_y, (s->mb_width + 3) + mb_x);
    }
}
static av_always_inline void filter_mb_row(AVCodecContext *avctx, void *tdata,
                              int jobnr, int threadnr, int is_vp7)
{
    VP8Context *s = avctx->priv_data;
    VP8ThreadData *td = &s->thread_data[threadnr];
    int mb_x, mb_y = atomic_load(&td->thread_mb_pos) >> 16, num_jobs = s->num_jobs;
    AVFrame *curframe = s->curframe->tf.f;
    VP8Macroblock *mb;
    VP8ThreadData *prev_td, *next_td;
    uint8_t *dst[3] = {
        curframe->data[0] + 16 * mb_y * s->linesize,
        curframe->data[1] +  8 * mb_y * s->uvlinesize,
        curframe->data[2] +  8 * mb_y * s->uvlinesize
    };

    if (s->mb_layout == 1)
        mb = s->macroblocks_base + ((s->mb_width + 1) * (mb_y + 1) + 1);
    else
        mb = s->macroblocks + (s->mb_height - mb_y - 1) * 2;

    if (mb_y == 0)
        prev_td = td;
    else
        prev_td = &s->thread_data[(jobnr + num_jobs - 1) % num_jobs];
    if (mb_y == s->mb_height - 1)
        next_td = td;
    else
        next_td = &s->thread_data[(jobnr + 1) % num_jobs];

    for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb++) {
        VP8FilterStrength *f = &td->filter_strength[mb_x];
        if (prev_td != td)
            check_thread_pos(td, prev_td,
                             (mb_x + 1) + (s->mb_width + 3), mb_y - 1);
        if (next_td != td)
            if (next_td != &s->thread_data[0])
                check_thread_pos(td, next_td, mb_x + 1, mb_y + 1);

        if (num_jobs == 1) {
            if (s->filter.simple)
                backup_mb_border(s->top_border[mb_x + 1], dst[0],
                                 NULL, NULL, s->linesize, 0, 1);
            else
                backup_mb_border(s->top_border[mb_x + 1], dst[0],
                                 dst[1], dst[2], s->linesize, s->uvlinesize, 0);
        }

        if (s->filter.simple)
            filter_mb_simple(s, dst[0], f, mb_x, mb_y);
        else
            filter_mb(s, dst, f, mb_x, mb_y, is_vp7);
        dst[0] += 16;
        dst[1] += 8;
        dst[2] += 8;

        update_pos(td, mb_y, (s->mb_width + 3) + mb_x);
    }
}