Function mergeSubtitles

libhb/sync.c:2799–2858

}

static hb_buffer_t * mergeSubtitles(sync_stream_t * stream)
{
    hb_buffer_t          * buf;
    hb_buffer_list_t       list;
    subtitle_sanitizer_t * sanitizer = &stream->subtitle.sanitizer;

    hb_buffer_list_clear(&list);

    if (!sanitizer->merge)
    {
        // Handle all but the last buffer
        // The last buffer may not have been "linked" yet
        while (hb_buffer_list_count(&sanitizer->list_current) > 0)
        {
            buf = hb_buffer_list_head(&sanitizer->list_current);
            if (!(buf->s.flags & HB_BUF_FLAG_EOF) &&
                buf->s.stop != AV_NOPTS_VALUE)
            {
                buf = hb_buffer_list_rem_head(&sanitizer->list_current);
                buf = setSubDuration(stream, buf);
                hb_buffer_list_append(&list, buf);
            }
            else
            {
                break;
            }
        }
        return hb_buffer_list_clear(&list);
    }

    // We only reach here if we are merging subtitles
    while (hb_buffer_list_count(&sanitizer->list_current) > 0)
    {
        buf = hb_buffer_list_head(&sanitizer->list_current);
        if (buf->s.flags & HB_BUF_FLAG_EOF)
        {
            // remove EOF from list, add to output
            buf = hb_buffer_list_rem_head(&sanitizer->list_current);
            hb_buffer_list_append(&list, buf);
            break;
        }

        int result = mergeSubtitleOverlaps(sanitizer);
        if (result < 0)
        {
            // not enough information available yet to resolve the overlap
            break;
        }

        // Overlap resolved, output a buffer
        buf = hb_buffer_list_rem_head(&sanitizer->list_current);
        if (buf != NULL && !(buf->s.flags & HB_BUF_FLAG_EOF))
        {
            buf = setSubDuration(stream, buf);
            hb_buffer_list_append(&list, buf);
        }
    }