static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) { unsigned char tag[5]; unsigned int flags = 0; const int stream_index = pkt->stream_index; int size = pkt->size; AVIContext *avi = s->priv_data; AVIOContext *pb = s->pb; AVIStream *avist = s->streams[stream_index]->priv_data; AVCodecParameters *par = s->streams[stream_index]->codecpar; while (par->block_align == 0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count) { AVPacket empty_packet; av_init_packet(&empty_packet); empty_packet.size = 0; empty_packet.data = NULL; empty_packet.stream_index = stream_index; avi_write_packet(s, &empty_packet); } avist->packet_count++; // Make sure to put an OpenDML chunk when the file size exceeds the limits if (pb->seekable && (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { avi_write_ix(s); ff_end_tag(pb, avi->movi_list); if (avi->riff_id == 1) avi_write_idx1(s); ff_end_tag(pb, avi->riff_start); avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi"); } avi_stream2fourcc(tag, stream_index, par->codec_type); if (pkt->flags & AV_PKT_FLAG_KEY) flags = 0x10; if (par->codec_type == AVMEDIA_TYPE_AUDIO) avist->audio_strm_length += size; if (s->pb->seekable) { int err; AVIIndex *idx = &avist->indexes; int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE; int id = idx->entry % AVI_INDEX_CLUSTER_SIZE; if (idx->ents_allocated <= idx->entry) { if ((err = av_reallocp(&idx->cluster, (cl + 1) * sizeof(*idx->cluster))) < 0) { idx->ents_allocated = 0; idx->entry = 0; return err; } idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry)); if (!idx->cluster[cl]) return -1; idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE; } idx->cluster[cl][id].flags = flags; idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list; idx->cluster[cl][id].len = size; idx->entry++; } avio_write(pb, tag, 4); avio_wl32(pb, size); avio_write(pb, pkt->data, size); if (size & 1) avio_w8(pb, 0); return 0; }