Update public FFmpeg header files from r16647 to r18286.

third_party/ffmpeg/include/libavformat/avio.h

 /*
- * unbuffered io for ffmpeg system
  * copyright (c) 2001 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #ifndef AVFORMAT_AVIO_H
 #define AVFORMAT_AVIO_H
 
+/**
+ * @file libavformat/avio.h
+ * unbuffered I/O operations
+ *
+ * @warning This file has to be considered an internal but installed
+ * header, so it should not be directly included in your projects.
+ */
+
 #include <stdint.h>
 
+#include "libavutil/common.h"
+
 /* unbuffered I/O */
 
 /**
  * URL Context.
  * New fields can be added to the end with minor version bumps.
  * Removal, reordering and changes to existing fields require a major
  * version bump.
  * sizeof(URLContext) must not be used outside libav*.
  */
 struct URLContext {
@@ skipping 26 matching lines @@
                        const char *filename, int flags);
 int url_open(URLContext **h, const char *filename, int flags);
 int url_read(URLContext *h, unsigned char *buf, int size);
 int url_write(URLContext *h, unsigned char *buf, int size);
 int64_t url_seek(URLContext *h, int64_t pos, int whence);
 int url_close(URLContext *h);
 int url_exist(const char *filename);
 int64_t url_filesize(URLContext *h);
 
 /**
+ * Return the file descriptor associated with this URL. For RTP, this
+ * will return only the RTP file descriptor, not the RTCP file descriptor.
+ * To get both, use rtp_get_file_handles().
+ *
+ * @return the file descriptor associated with this URL, or <0 on error.
+ */
+int url_get_file_handle(URLContext *h);
+
+/**
  * Return the maximum packet size associated to packetized file
  * handle. If the file is not packetized (stream like HTTP or file on
  * disk), then 0 is returned.
  *
  * @param h file handle
  * @return maximum packet size in bytes
  */
 int url_get_max_packet_size(URLContext *h);
 void url_get_filename(URLContext *h, char *buf, int buf_size);
 
@@ skipping 46 matching lines @@
     const char *name;
     int (*url_open)(URLContext *h, const char *filename, int flags);
     int (*url_read)(URLContext *h, unsigned char *buf, int size);
     int (*url_write)(URLContext *h, unsigned char *buf, int size);
     int64_t (*url_seek)(URLContext *h, int64_t pos, int whence);
     int (*url_close)(URLContext *h);
     struct URLProtocol *next;
     int (*url_read_pause)(URLContext *h, int pause);
     int64_t (*url_read_seek)(URLContext *h, int stream_index,
                              int64_t timestamp, int flags);
+    int (*url_get_file_handle)(URLContext *h);
 } URLProtocol;
 
+#if LIBAVFORMAT_VERSION_MAJOR < 53
 extern URLProtocol *first_protocol;
+#endif
+
 extern URLInterruptCB *url_interrupt_cb;
 
+/**
+ * If protocol is NULL, returns the first registered protocol,
+ * if protocol is non-NULL, returns the next registered protocol after protocol,
+ * or NULL if protocol is the last one.
+ */
 URLProtocol *av_protocol_next(URLProtocol *p);
 
-int register_protocol(URLProtocol *protocol);
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+/**
+ * @deprecated Use av_register_protocol() instead.
+ */
+attribute_deprecated int register_protocol(URLProtocol *protocol);
+#endif
+
+int av_register_protocol(URLProtocol *protocol);
 
 /**
  * Bytestream IO Context.
  * New fields can be added to the end with minor version bumps.
  * Removal, reordering and changes to existing fields require a major
  * version bump.
  * sizeof(ByteIOContext) must not be used outside libav*.
  */
 typedef struct {
     unsigned char *buffer;
@@ skipping 202 matching lines @@
 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
                                     unsigned int len);
 unsigned long get_checksum(ByteIOContext *s);
 void init_checksum(ByteIOContext *s,
                    unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
                    unsigned long checksum);
 
 /* udp.c */
 int udp_set_remote_url(URLContext *h, const char *uri);
 int udp_get_local_port(URLContext *h);
+#if (LIBAVFORMAT_VERSION_MAJOR <= 52)
 int udp_get_file_handle(URLContext *h);
+#endif
 
 #endif /* AVFORMAT_AVIO_H */