static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)

{

    AVStream *st;

    MOVStreamContext *sc;

    unsigned int i, entries;



    if (c->fc->nb_streams < 1)

        return 0;

    st = c->fc->streams[c->fc->nb_streams-1];

    sc = st->priv_data;



    avio_r8(pb); 

    avio_rb24(pb); 



    entries = avio_rb32(pb);



    av_dlog(c->fc, "keyframe_count = %d\n", entries);



    if (!entries)

    {

        sc->keyframe_absent = 1;

        if (!st->need_parsing)

            st->need_parsing = AVSTREAM_PARSE_HEADERS;

        return 0;

    }

    if (entries >= UINT_MAX / sizeof(int))

        return AVERROR_INVALIDDATA;

    sc->keyframes = av_malloc(entries * sizeof(int));

    if (!sc->keyframes)

        return AVERROR(ENOMEM);



    for (i = 0; i < entries && !pb->eof_reached; i++) {

        sc->keyframes[i] = avio_rb32(pb);

        

    }



    sc->keyframe_count = i;



    if (pb->eof_reached)

        return AVERROR_EOF;



    return 0;

}
