Re: [FFmpeg-devel] [PATCH v9 13/13] vvcdec: add vvc decoder

[James Almer <jamrial@gmail.com>]

On 1/1/2024 11:12 AM, Nuo Mi wrote:
> +static int decode_nal_units(VVCContext *s, VVCFrameContext *fc, AVPacket *avpkt)
> +{
> +    const CodedBitstreamH266Context *h266 = s->cbc->priv_data;
> +    CodedBitstreamFragment *frame         = &s->current_frame;
> +    int ret = 0;
> +    int eos_at_start = 1;

This never changes, yet it's checked below like it does.

> +    s->last_eos = s->eos;
> +    s->eos = 0;
> +
> +    ff_cbs_fragment_reset(frame);
> +    ret = ff_cbs_read_packet(s->cbc, frame, avpkt);
> +    if (ret < 0) {
> +        av_log(s->avctx, AV_LOG_ERROR, "Failed to read packet.\n");
> +        return ret;
> +    }
> +    /* decode the NAL units */
> +    for (int i = 0; i < frame->nb_units; i++) {
> +        const H2645NAL *nal            = h266->common.read_packet.nals + i;
> +        const CodedBitstreamUnit *unit = frame->units + i;
> +
> +        if (unit->type == VVC_EOB_NUT || unit->type == VVC_EOS_NUT) {
> +            if (eos_at_start)
> +                s->last_eos = 1;
> +            else
> +                s->eos = 1;
> +        } else {
> +            ret = decode_nal_unit(s, fc, nal, unit);
> +            if (ret < 0) {
> +                av_log(s->avctx, AV_LOG_WARNING,
> +                        "Error parsing NAL unit #%d.\n", i);
> +                goto fail;
> +            }
> +        }
> +    }
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