Function dvvideo_encode_init

libavcodec/dvenc.c:71–125

static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
{
    DVEncContext *s = avctx->priv_data;
    FDCTDSPContext fdsp;
    int ret;

    s->avctx = avctx;

    if (avctx->chroma_sample_location != AVCHROMA_LOC_TOPLEFT) {
        const char *name = av_chroma_location_name(avctx->chroma_sample_location);
        av_log(avctx, AV_LOG_WARNING, "Only top-left chroma location is supported "
               "in DV, input value is: %s\n", name ? name : "unknown");
        if (avctx->strict_std_compliance > FF_COMPLIANCE_NORMAL)
            return AVERROR(EINVAL);
    }

    s->sys = av_dv_codec_profile2(avctx->width, avctx->height, avctx->pix_fmt, avctx->time_base);
    if (!s->sys) {
        av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
                                    "Valid DV profiles are:\n",
               avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
        ff_dv_print_profiles(avctx, AV_LOG_ERROR);
        return AVERROR(EINVAL);
    }

    ff_dv_init_dynamic_tables(s->work_chunks, s->sys);

    if (avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT) {
        MECmpContext mecc;
        me_cmp_func ildct_cmp[6];

        ff_me_cmp_init(&mecc, avctx);
        ret = ff_set_cmp(&mecc, ildct_cmp, avctx->ildct_cmp, 0);
        if (ret < 0)
            return ret;
        if (!ildct_cmp[5])
            return AVERROR(EINVAL);
        s->ildct_cmp = ildct_cmp[5];
    }

    memset(&fdsp,0, sizeof(fdsp));
    ff_fdctdsp_init(&fdsp, avctx);
    s->fdct[0]    = fdsp.fdct;
    s->fdct[1]    = fdsp.fdct248;
    ff_pixblockdsp_init(&s->pdsp, 8);

#if !CONFIG_HARDCODED_TABLES
    {
        static AVOnce init_static_once = AV_ONCE_INIT;
        ff_thread_once(&init_static_once, dv_vlc_map_tableinit);
    }
#endif

    return 0;
}

/* bit budget for AC only in 5 MBs */
static const int vs_total_ac_bits_hd = (68 * 6 + 52*2) * 5;