Function ff_er_frame_end

libavcodec/error_resilience.c:910–1368

}

void ff_er_frame_end(ERContext *s, int *decode_error_flags)
{
    int *linesize = NULL;
    int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
    int distance;
    int threshold_part[4] = { 100, 100, 100 };
    int threshold = 50;
    int is_intra_likely;
    int size = s->b8_stride * 2 * s->mb_height;
    int guessed_mb_type;

    /* We do not support ER of field pictures yet,
     * though it should not crash if enabled. */
    if (!s->avctx->error_concealment || !atomic_load(&s->error_count)  ||
        s->avctx->lowres                                               ||
        !er_supported(s)                                               ||
        atomic_load(&s->error_count) == 3 * s->mb_width *
                          (s->avctx->skip_top + s->avctx->skip_bottom)) {
        return;
    }
    linesize = s->cur_pic.f->linesize;

    if (   s->avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO
        && (FFALIGN(s->avctx->height, 16)&16)
        && atomic_load(&s->error_count) == 3 * s->mb_width * (s->avctx->skip_top + s->avctx->skip_bottom + 1)) {
        for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
            int status = s->error_status_table[mb_x + (s->mb_height - 1) * s->mb_stride];
            if (status != 0x7F)
                break;
        }

        if (mb_x == s->mb_width) {
            av_log(s->avctx, AV_LOG_DEBUG, "ignoring last missing slice\n");
            return;
        }
    }

    if (s->last_pic.f) {
        if (s->last_pic.f->width  != s->cur_pic.f->width  ||
            s->last_pic.f->height != s->cur_pic.f->height ||
            s->last_pic.f->format != s->cur_pic.f->format) {
            av_log(s->avctx, AV_LOG_WARNING, "Cannot use previous picture in error concealment\n");
            memset(&s->last_pic, 0, sizeof(s->last_pic));
        }
    }
    if (s->next_pic.f) {
        if (s->next_pic.f->width  != s->cur_pic.f->width  ||
            s->next_pic.f->height != s->cur_pic.f->height ||
            s->next_pic.f->format != s->cur_pic.f->format) {
            av_log(s->avctx, AV_LOG_WARNING, "Cannot use next picture in error concealment\n");
            memset(&s->next_pic, 0, sizeof(s->next_pic));
        }
    }

    if (!s->cur_pic.motion_val[0] || !s->cur_pic.ref_index[0]) {
        av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");

        for (i = 0; i < 2; i++) {