avformat/avio_internal: Don't include url.h

It is only included because two very rarely used functions
use pointers to URLContexts; use struct URLContext instead.
Also move ffio_geturlcontext() so that one can avoid
a forward declaration of struct URLContext (which would be
necessary as soon as FF_API_AVIODIRCONTEXT is no more).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavformat/avio_internal.h

@@ -20,7 +20,6 @@
 #define AVFORMAT_AVIO_INTERNAL_H
 
 #include "avio.h"
-#include "url.h"
 
 #include "libavutil/log.h"
 
@@ -194,6 +193,14 @@ unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf,
  */
 int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
 
+/**
+ * Return the URLContext associated with the AVIOContext
+ *
+ * @param s IO context
+ * @return pointer to URLContext or NULL.
+ */
+struct URLContext *ffio_geturlcontext(AVIOContext *s);
+
 /**
  * Create and initialize a AVIOContext for accessing the
  * resource referenced by the URLContext h.
@@ -205,15 +212,7 @@ int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
  * @return >= 0 in case of success, a negative value corresponding to an
  * AVERROR code in case of failure
  */
-int ffio_fdopen(AVIOContext **s, URLContext *h);
-
-/**
- * Return the URLContext associated with the AVIOContext
- *
- * @param s IO context
- * @return pointer to URLContext or NULL.
- */
-URLContext *ffio_geturlcontext(AVIOContext *s);
+int ffio_fdopen(AVIOContext **s, struct URLContext *h);
 
 
 /**

libavformat/dashdec.c

@@ -29,6 +29,7 @@
 #include "avio_internal.h"
 #include "dash.h"
 #include "demux.h"
+#include "url.h"
 
 #define INITIAL_BUFFER_SIZE 32768
 

libavformat/format.c

@@ -30,6 +30,7 @@
 #include "avformat.h"
 #include "id3v2.h"
 #include "internal.h"
+#include "url.h"
 
 
 /**

libavformat/hls.c

@@ -43,6 +43,7 @@
 #include "internal.h"
 #include "avio_internal.h"
 #include "id3v2.h"
+#include "url.h"
 
 #include "hls_sample_encryption.h"
 

libavformat/hlsenc.c

@@ -51,6 +51,7 @@
 #include "internal.h"
 #include "mux.h"
 #include "os_support.h"
+#include "url.h"
 
 typedef enum {
     HLS_START_SEQUENCE_AS_START_NUMBER = 0,

libavformat/rtpenc_chain.c

@@ -23,6 +23,7 @@
 #include "avio_internal.h"
 #include "rtpenc_chain.h"
 #include "rtp.h"
+#include "url.h"
 #include "libavutil/opt.h"
 
 int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,