Function ff_mpv_decode_init

libavcodec/mpegvideo_dec.c:86–117

H264_CHROMA_MC(avg_, op_avg)

av_cold int ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
{
    enum ThreadingStatus thread_status;

    ff_mpv_common_defaults(s);

    s->avctx           = avctx;
    s->width           = avctx->coded_width;
    s->height          = avctx->coded_height;
    s->codec_id        = avctx->codec->id;
    s->workaround_bugs = avctx->workaround_bugs;

    /* convert fourcc to upper case */
    s->codec_tag       = ff_toupper4(avctx->codec_tag);

    ff_mpv_idct_init(s);

    ff_h264chroma_init(&s->h264chroma, 8); //for lowres
    s->h264chroma.avg_h264_chroma_pixels_tab[3] = avg_h264_chroma_mc1;
    s->h264chroma.put_h264_chroma_pixels_tab[3] = put_h264_chroma_mc1;

    if (s->picture_pool)  // VC-1 can call this multiple times
        return 0;

    thread_status = ff_thread_sync_ref(avctx, offsetof(MpegEncContext, picture_pool));
    if (thread_status != FF_THREAD_IS_COPY) {
        s->picture_pool = ff_mpv_alloc_pic_pool(thread_status != FF_THREAD_NO_FRAME_THREADING);
        if (!s->picture_pool)
            return AVERROR(ENOMEM);
    }
    return 0;
}

int ff_mpeg_update_thread_context(AVCodecContext *dst,
                                  const AVCodecContext *src)