示例#1
0
static av_cold int dvvideo_encode_init(AVCodecContext *avctx)
{
    DVVideoContext *s = avctx->priv_data;
    FDCTDSPContext fdsp;
    MECmpContext mecc;
    PixblockDSPContext pdsp;
    int ret;

    s->sys = avpriv_dv_codec_profile(avctx);
    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);
    }
    if (avctx->height > 576) {
        av_log(avctx, AV_LOG_ERROR, "DVCPRO HD encoding is not supported.\n");
        return AVERROR_PATCHWELCOME;
    }
    ret = ff_dv_init_dynamic_tables(s, s->sys);
    if (ret < 0) {
        av_log(avctx, AV_LOG_ERROR, "Error initializing work tables.\n");
        return ret;
    }

    avctx->coded_frame = av_frame_alloc();
    if (!avctx->coded_frame)
        return AVERROR(ENOMEM);

    dv_vlc_map_tableinit();

    memset(&fdsp,0, sizeof(fdsp));
    memset(&mecc,0, sizeof(mecc));
    memset(&pdsp,0, sizeof(pdsp));
    ff_fdctdsp_init(&fdsp, avctx);
    ff_me_cmp_init(&mecc, avctx);
    ff_pixblockdsp_init(&pdsp, avctx);
    ff_set_cmp(&mecc, mecc.ildct_cmp, avctx->ildct_cmp);

    s->get_pixels = pdsp.get_pixels;
    s->ildct_cmp  = mecc.ildct_cmp[5];

    s->fdct[0]    = fdsp.fdct;
    s->fdct[1]    = fdsp.fdct248;

    return ff_dvvideo_init(avctx);
}
int avcodec_dct_init(AVDCT *dsp)
{
    AVCodecContext *avctx = avcodec_alloc_context3(NULL);

    if (!avctx)
        return AVERROR(ENOMEM);

    avctx->idct_algo = dsp->idct_algo;
    avctx->dct_algo  = dsp->dct_algo;
    avctx->bits_per_raw_sample = dsp->bits_per_sample;

#define COPY(src, name) memcpy(&dsp->name, &src.name, sizeof(dsp->name))

#if CONFIG_IDCTDSP
    {
        IDCTDSPContext idsp;
        ff_idctdsp_init(&idsp, avctx);
        COPY(idsp, idct);
        COPY(idsp, idct_permutation);
    }
#endif

#if CONFIG_FDCTDSP
    {
        FDCTDSPContext fdsp;
        ff_fdctdsp_init(&fdsp, avctx);
        COPY(fdsp, fdct);
    }
#endif

#if CONFIG_PIXBLOCKDSP
    {
        PixblockDSPContext pdsp;
        ff_pixblockdsp_init(&pdsp, avctx);
        COPY(pdsp, get_pixels);
    }
#endif

    avcodec_close(avctx);
    av_free(avctx);

    return 0;
}