static int rv10_decode_frame(AVCodecContext *avctx,
                             void *data, int *data_size,
                             AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    MpegEncContext *s = avctx->priv_data;
    int i;
    AVFrame *pict = data;
    int slice_count;
    const uint8_t *slices_hdr = NULL;

    av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);

    /* no supplementary picture */
    if (buf_size == 0) {
        return 0;
    }

    if(!avctx->slice_count){
        slice_count = (*buf++) + 1;
        slices_hdr = buf + 4;
        buf += 8 * slice_count;
    }else
        slice_count = avctx->slice_count;

    for(i=0; i<slice_count; i++){
        int offset= get_slice_offset(avctx, slices_hdr, i);
        int size, size2;

        if(i+1 == slice_count)
            size= buf_size - offset;
        else
            size= get_slice_offset(avctx, slices_hdr, i+1) - offset;

        if(i+2 >= slice_count)
            size2= buf_size - offset;
        else
            size2= get_slice_offset(avctx, slices_hdr, i+2) - offset;

        if(rv10_decode_packet(avctx, buf+offset, size, size2) > 8*size)
            i++;
    }

    if(s->current_picture_ptr != NULL && s->mb_y>=s->mb_height){
        ff_er_frame_end(s);
        MPV_frame_end(s);

        if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
            *pict= *(AVFrame*)s->current_picture_ptr;
        } else if (s->last_picture_ptr != NULL) {
            *pict= *(AVFrame*)s->last_picture_ptr;
        }

        if(s->last_picture_ptr || s->low_delay){
            *data_size = sizeof(AVFrame);
            ff_print_debug_info(s, pict);
        }
        s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
    }

    return buf_size;
}