+//#define DEBUG_SEEK
+
+/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated
+ by the write position inside this function */
+static void ffm_seek1(AVFormatContext *s, offset_t pos1)
+{
+ FFMContext *ffm = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ offset_t pos;
+
+ pos = pos1 + ffm->write_index;
+ if (pos >= ffm->file_size)
+ pos -= (ffm->file_size - FFM_PACKET_SIZE);
+#ifdef DEBUG_SEEK
+ av_log(s, AV_LOG_DEBUG, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
+#endif
+ url_fseek(pb, pos, SEEK_SET);
+}
+
+static int64_t get_pts(AVFormatContext *s, offset_t pos)
+{
+ ByteIOContext *pb = s->pb;
+ int64_t pts;
+
+ ffm_seek1(s, pos);
+ url_fskip(pb, 4);
+ pts = get_be64(pb);
+#ifdef DEBUG_SEEK
+ av_log(s, AV_LOG_DEBUG, "pts=%0.6f\n", pts / 1000000.0);
+#endif
+ return pts;
+}