lavf: make av_interleave_packet_per_dts() private.

There is no reason for it to be public, it's only meant to be used
internally.

libavformat/avformat.h

@@ -1374,23 +1374,15 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt);
  */
 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
 
+#if FF_API_INTERLEAVE_PACKET
 /**
- * Interleave a packet per dts in an output media file.
- *
- * Packets with pkt->destruct == av_destruct_packet will be freed inside this
- * function, so they cannot be used after it. Note that calling av_free_packet()
- * on them is still safe.
- *
- * @param s media file handle
- * @param out the interleaved packet will be output here
- * @param pkt the input packet
- * @param flush 1 if no further packets are available as input and all
- *              remaining packets should be output
- * @return 1 if a packet was output, 0 if no packet could be output,
- *         < 0 if an error occurred
+ * @deprecated this function was never meant to be called by the user
+ * programs.
  */
+attribute_deprecated
 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
                                  AVPacket *pkt, int flush);
+#endif
 
 /**
  * Write the stream trailer to an output media file and free the

libavformat/gxfenc.c

@@ -936,7 +936,7 @@ static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pk
     if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
         pkt->duration = 2; // enforce 2 fields
     return ff_audio_rechunk_interleave(s, out, pkt, flush,
-                               av_interleave_packet_per_dts, gxf_compare_field_nb);
+                               ff_interleave_packet_per_dts, gxf_compare_field_nb);
 }
 
 AVOutputFormat ff_gxf_muxer = {

libavformat/internal.h

@@ -327,4 +327,22 @@ int ff_framehash_write_header(AVFormatContext *s);
  */
 int ff_read_packet(AVFormatContext *s, AVPacket *pkt);
 
+/**
+ * Interleave a packet per dts in an output media file.
+ *
+ * Packets with pkt->destruct == av_destruct_packet will be freed inside this
+ * function, so they cannot be used after it. Note that calling av_free_packet()
+ * on them is still safe.
+ *
+ * @param s media file handle
+ * @param out the interleaved packet will be output here
+ * @param pkt the input packet
+ * @param flush 1 if no further packets are available as input and all
+ *              remaining packets should be output
+ * @return 1 if a packet was output, 0 if no packet could be output,
+ *         < 0 if an error occurred
+ */
+int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
+                                 AVPacket *pkt, int flush);
+
 #endif /* AVFORMAT_INTERNAL_H */

libavformat/utils.c

@@ -3068,7 +3068,9 @@ static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacke
     return comp > 0;
 }
 
-int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
+int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
+                                 AVPacket *pkt, int flush)
+{
     AVPacketList *pktl;
     int stream_count=0;
     int i;
@@ -3098,6 +3100,14 @@ int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pk
     }
 }
 
+#if FF_API_INTERLEAVE_PACKET
+int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
+                                 AVPacket *pkt, int flush)
+{
+    return ff_interleave_packet_per_dts(s, out, pkt, flush);
+}
+#endif
+
 /**
  * Interleave an AVPacket correctly so it can be muxed.
  * @param out the interleaved packet will be output here
@@ -3114,7 +3124,7 @@ static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, in
             av_free_packet(in);
         return ret;
     } else
-        return av_interleave_packet_per_dts(s, out, in, flush);
+        return ff_interleave_packet_per_dts(s, out, in, flush);
 }
 
 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){

libavformat/version.h

@@ -56,5 +56,8 @@
 #ifndef FF_API_READ_PACKET
 #define FF_API_READ_PACKET             (LIBAVFORMAT_VERSION_MAJOR < 55)
 #endif
+#ifndef FF_API_INTERLEAVE_PACKET
+#define FF_API_INTERLEAVE_PACKET       (LIBAVFORMAT_VERSION_MAJOR < 55)
+#endif
 
 #endif /* AVFORMAT_VERSION_H */