- for(;;) {
- /* select current input stream component */
- st = s->cur_st;
- if (st) {
- if (!st->need_parsing || !st->parser) {
- /* no parsing needed: we just output the packet as is */
- /* raw data support */
- *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
- compute_pkt_fields(s, st, NULL, pkt);
- s->cur_st = NULL;
- if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
- (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
- ff_reduce_index(s, st->index);
- av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
- }
- break;
- } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
- len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
- st->cur_ptr, st->cur_len,
- st->cur_pkt.pts, st->cur_pkt.dts,
- st->cur_pkt.pos);
- st->cur_pkt.pts = AV_NOPTS_VALUE;
- st->cur_pkt.dts = AV_NOPTS_VALUE;
- /* increment read pointer */
- st->cur_ptr += len;
- st->cur_len -= len;
-
- /* return packet if any */
- if (pkt->size) {
- got_packet:
- pkt->duration = 0;
- if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
- if (st->codec->sample_rate > 0) {
- pkt->duration = av_rescale_q_rnd(st->parser->duration,
- (AVRational){ 1, st->codec->sample_rate },
- st->time_base,
- AV_ROUND_DOWN);
- }
- } else if (st->codec->time_base.num != 0 &&
- st->codec->time_base.den != 0) {
- pkt->duration = av_rescale_q_rnd(st->parser->duration,
- st->codec->time_base,
- st->time_base,
- AV_ROUND_DOWN);
- }
- pkt->stream_index = st->index;
- pkt->pts = st->parser->pts;
- pkt->dts = st->parser->dts;
- pkt->pos = st->parser->pos;
- if (st->parser->key_frame == 1 ||
- (st->parser->key_frame == -1 &&
- st->parser->pict_type == AV_PICTURE_TYPE_I))
- pkt->flags |= AV_PKT_FLAG_KEY;
- if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
- s->cur_st = NULL;
- pkt->destruct= st->cur_pkt.destruct;
- st->cur_pkt.destruct= NULL;
- st->cur_pkt.data = NULL;
- assert(st->cur_len == 0);
- }else{
- pkt->destruct = NULL;
- }
- compute_pkt_fields(s, st, st->parser, pkt);