+ if (dsf->data_size > dsf->audio_size) {
+ int last_packet = pos == (dsf->data_end - st->codecpar->block_align);
+
+ if (last_packet) {
+ int64_t data_pos = pos - s->internal->data_offset;
+ int64_t packet_size = dsf->audio_size - data_pos;
+ int64_t skip_size = dsf->data_size - data_pos - packet_size;
+ uint8_t *dst;
+ int ch, ret;
+
+ if (packet_size <= 0 || skip_size <= 0)
+ return AVERROR_INVALIDDATA;
+
+ if ((ret = av_new_packet(pkt, packet_size)) < 0)
+ return ret;
+ dst = pkt->data;
+ for (ch = 0; ch < st->codecpar->channels; ch++) {
+ ret = avio_read(pb, dst, packet_size / st->codecpar->channels);
+ if (ret < packet_size / st->codecpar->channels)
+ return AVERROR_EOF;
+
+ dst += ret;
+ avio_skip(pb, skip_size / st->codecpar->channels);
+ }
+
+ pkt->pos = pos;
+ pkt->stream_index = 0;
+ pkt->pts = (pos - s->internal->data_offset) / st->codecpar->channels;
+ pkt->duration = packet_size / st->codecpar->channels;
+ return 0;
+ }
+ }
+ ret = av_get_packet(pb, pkt, FFMIN(dsf->data_end - pos, st->codecpar->block_align));
+ if (ret < 0)
+ return ret;
+