static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt) { GXFContext *gxf = s->priv_data; AVIOContext *pb = s->pb; AVStream *st = s->streams[pkt->stream_index]; int64_t pos = avio_tell(pb); int padding = 0; int packet_start_offset = avio_tell(pb) / 1024; gxf_write_packet_header(pb, PKT_MEDIA); if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */ padding = 4 - pkt->size % 4; else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) padding = GXF_AUDIO_PACKET_SIZE - pkt->size; gxf_write_media_preamble(s, pkt, pkt->size + padding); avio_write(pb, pkt->data, pkt->size); gxf_write_padding(pb, padding); if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { if (!(gxf->flt_entries_nb % 500)) { int err; if ((err = av_reallocp_array(&gxf->flt_entries, gxf->flt_entries_nb + 500, sizeof(*gxf->flt_entries))) < 0) { gxf->flt_entries_nb = 0; av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n"); return err; } } gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset; gxf->nb_fields += 2; // count fields } updatePacketSize(pb, pos); gxf->packet_count++; if (gxf->packet_count == 100) { gxf_write_map_packet(s, 0); gxf->packet_count = 0; } return 0; }