Function process_delay_list

libhb/encavcodec.c:1242–1284

Generate DTS by rearranging PTS in this sequence: pts0 - delay, pts1 - delay, pts2 - delay, pts1, pts2, pts3... Where pts0 - ptsN are in decoded monotonically increasing presentation order and delay == pts1 (1 being the number of frames the decoder must delay before it has sufficient information to decode). The number of frames to delay is set by job->areBframes, so it is configurable. This guara

//
// This is similar to how x264 generates DTS
static hb_buffer_t * process_delay_list( hb_work_private_t * pv, hb_buffer_t * buf )
{
    if (pv->job->areBframes)
    {
        // Has dts_delay been set yet?
        hb_buffer_list_append(&pv->delay_list, buf);
        if (pv->frameno_in <= pv->job->areBframes)
        {
            // dts_delay not yet set.  queue up buffers till it is set.
            return NULL;
        }

        // We have dts_delay.  Apply it to any queued buffers renderOffset
        // and return all queued buffers.
        buf = hb_buffer_list_head(&pv->delay_list);
        while (buf != NULL)
        {
            // Use the cached frame info to get the start time of Nth frame
            // Note that start Nth frame != start time this buffer since the
            // output buffers have rearranged start times.
            if (pv->frameno_out < pv->job->areBframes)
            {
                int64_t start = get_frame_start( pv, pv->frameno_out );
                buf->s.renderOffset = start - pv->dts_delay;
            }
            else
            {
                buf->s.renderOffset = get_frame_start(pv,
                                        pv->frameno_out - pv->job->areBframes);
            }
            buf = buf->next;
            pv->frameno_out++;
        }
        buf = hb_buffer_list_clear(&pv->delay_list);
        return buf;
    }
    else if (buf != NULL)
    {
        buf->s.renderOffset = buf->s.start;
        return buf;
    }
    return NULL;
}

static uint8_t convert_pict_type(const AVPacket *pkt, uint16_t *sflags)
{