static int dvdsub_parse(AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size) { DVDSubParseContext *pc = s->priv_data; if (pc->packet_index == 0) { if (buf_size < 2) return buf_size; pc->packet_len = AV_RB16(buf); if (pc->packet_len == 0) /* HD-DVD subpicture packet */ pc->packet_len = AV_RB32(buf+2); av_freep(&pc->packet); pc->packet = av_malloc(pc->packet_len); } if (pc->packet) { if (pc->packet_index + buf_size <= pc->packet_len) { memcpy(pc->packet + pc->packet_index, buf, buf_size); pc->packet_index += buf_size; if (pc->packet_index >= pc->packet_len) { *poutbuf = pc->packet; *poutbuf_size = pc->packet_len; pc->packet_index = 0; return buf_size; } } else { /* erroneous size */ pc->packet_index = 0; } } *poutbuf = NULL; *poutbuf_size = 0; return buf_size; }