lavf: remove FF_API_URL_RESETBUF cruft

libavformat/avio.h

@@ -542,14 +542,6 @@ int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen);
 int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen);
 
 
-#if FF_API_URL_RESETBUF
-/** Reset the buffer for reading or writing.
- * @note Will drop any data currently in the buffer without transmitting it.
- * @param flags URL_RDONLY to set up the buffer for reading, or URL_WRONLY
- *        to set up the buffer for writing. */
-int url_resetbuf(AVIOContext *s, int flags);
-#endif
-
 /**
  * @defgroup open_modes URL open modes
  * The flags argument to avio_open must be one of the following

libavformat/aviobuf.c

@@ -38,9 +38,7 @@
 #define SHORT_SEEK_THRESHOLD 4096
 
 static void fill_buffer(AVIOContext *s);
-#if !FF_API_URL_RESETBUF
 static int url_resetbuf(AVIOContext *s, int flags);
-#endif
 
 int ffio_init_context(AVIOContext *s,
                   unsigned char *buffer,
@@ -878,18 +876,9 @@ int ffio_set_buf_size(AVIOContext *s, int buf_size)
     return 0;
 }
 
-#if FF_API_URL_RESETBUF
-int url_resetbuf(AVIOContext *s, int flags)
-#else
 static int url_resetbuf(AVIOContext *s, int flags)
-#endif
 {
-#if FF_API_URL_RESETBUF
-    if (flags & AVIO_RDWR)
-        return AVERROR(EINVAL);
-#else
     assert(flags == AVIO_WRONLY || flags == AVIO_RDONLY);
-#endif
 
     if (flags & AVIO_WRONLY) {
         s->buf_end = s->buffer + s->buffer_size;

libavformat/version.h

@@ -47,9 +47,6 @@
 #ifndef FF_API_URL_CLASS
 #define FF_API_URL_CLASS               (LIBAVFORMAT_VERSION_MAJOR >= 53)
 #endif
-#ifndef FF_API_URL_RESETBUF
-#define FF_API_URL_RESETBUF            (LIBAVFORMAT_VERSION_MAJOR < 53)
-#endif
 #ifndef FF_API_REGISTER_PROTOCOL
 #define FF_API_REGISTER_PROTOCOL       (LIBAVFORMAT_VERSION_MAJOR < 53)
 #endif