Function av1_decode_init

libavcodec/av1dec.c:861–919

};

static av_cold int av1_decode_init(AVCodecContext *avctx)
{
    AV1DecContext *s = avctx->priv_data;
    AV1RawSequenceHeader *seq;
    const AVPacketSideData *sd;
    int ret;

    s->avctx = avctx;
    s->pkt = avctx->internal->in_pkt;
    s->pix_fmt = AV_PIX_FMT_NONE;

    ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, avctx);
    if (ret < 0)
        return ret;

    s->cbc->decompose_unit_types    = decompose_unit_types;
    s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);

    s->itut_t35_fifo = av_fifo_alloc2(1, sizeof(AV1RawMetadataITUTT35),
                                      AV_FIFO_FLAG_AUTO_GROW);
    if (!s->itut_t35_fifo)
        return AVERROR(ENOMEM);

    av_opt_set_int(s->cbc->priv_data, "operating_point", s->operating_point, 0);

    if (avctx->extradata && avctx->extradata_size) {
        ret = ff_cbs_read_extradata_from_codec(s->cbc,
                                               &s->current_obu,
                                               avctx);
        if (ret < 0) {
            av_log(avctx, AV_LOG_WARNING, "Failed to read extradata.\n");
            goto end;
        }

        seq = ((CodedBitstreamAV1Context *)(s->cbc->priv_data))->sequence_header;
        if (!seq) {
            if (!(avctx->extradata[0] & 0x80))
                av_log(avctx, AV_LOG_WARNING, "No sequence header available in extradata.\n");
            goto end;
        }

        ret = set_context_with_sequence(avctx, seq);
        if (ret < 0) {
            av_log(avctx, AV_LOG_WARNING, "Failed to set decoder context.\n");
            goto end;
        }

        end:
        ff_cbs_fragment_reset(&s->current_obu);
    }

    s->dovi.logctx = avctx;
    s->dovi.cfg.dv_profile = 10; // default for AV1
    sd = ff_get_coded_side_data(avctx, AV_PKT_DATA_DOVI_CONF);
    if (sd && sd->size >= sizeof(s->dovi.cfg))
        s->dovi.cfg = *(AVDOVIDecoderConfigurationRecord *) sd->data;

    return ret;