Fix compile problem when old version of libvorbisfile v1.1.2 is used.

The principle difference between libvorbisfile v1.1.2 and newer (at least
v1.2.0) is the addition of the predefined callbacks OV_CALLBACKS_xxx in
vorbis/vorbisfile.h used for ov_open_callbacks().

* Updated the configure script to detect if libvorbisfile.h declares
OV_CALLBACKS_NOCLOSE.

* Copied the declaration of OV_CALLBACKS_NOCLOSE from v1.2.0 to allow
v1.1.2 to compile.

(closes issue ASTERISK-19370)
Reported by: Jonn Taylor


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@355608 65c4cc65-6c06-0410-ace0-fbb531ad65f3

autoconf/ast_c_declare_check.m4

@@ -0,0 +1,31 @@
+# Check if a given symbol is declared using a certain header.
+# Check whether SYMBOL (a function, variable, or constant) is declared.
+
+# AST_C_DECLARE_CHECK([package], [symbol], [header file], [version])
+AC_DEFUN([AST_C_DECLARE_CHECK],
+[
+    if test "x${PBX_$1}" != "x1" -a "${USE_$1}" != "no"; then
+        AC_MSG_CHECKING([for $2 declared in $3])
+        saved_cppflags="${CPPFLAGS}"
+        if test "x${$1_DIR}" != "x"; then
+            $1_INCLUDE="-I${$1_DIR}/include"
+        fi
+        CPPFLAGS="${CPPFLAGS} ${$1_INCLUDE}"
+
+        AC_COMPILE_IFELSE(
+            [ AC_LANG_PROGRAM( [#include <$3>],
+                                [#if !defined($2)
+                                    (void) $2;
+                                #endif
+                                ])],
+            [   AC_MSG_RESULT(yes)
+                PBX_$1=1
+                AC_DEFINE([HAVE_$1], 1, [Define if your system has $2 declared.])
+                m4_ifval([$4], [AC_DEFINE([HAVE_$1_VERSION], $4, [Define $1 headers version])])
+            ],
+            [   AC_MSG_RESULT(no) ] 
+        )
+
+        CPPFLAGS="${saved_cppflags}"
+    fi
+])

configure

@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 350837 .
+# From configure.ac Revision: 355365 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.63 for asterisk trunk.
 #
@@ -53271,6 +53271,76 @@ fi
 
 fi
 
+    if test "x${PBX_VORBIS_OPEN_CALLBACKS}" != "x1" -a "${USE_VORBIS_OPEN_CALLBACKS}" != "no"; then
+        { $as_echo "$as_me:$LINENO: checking for OV_CALLBACKS_NOCLOSE declared in vorbis/vorbisfile.h" >&5
+$as_echo_n "checking for OV_CALLBACKS_NOCLOSE declared in vorbis/vorbisfile.h... " >&6; }
+        saved_cppflags="${CPPFLAGS}"
+        if test "x${VORBIS_OPEN_CALLBACKS_DIR}" != "x"; then
+            VORBIS_OPEN_CALLBACKS_INCLUDE="-I${VORBIS_OPEN_CALLBACKS_DIR}/include"
+        fi
+        CPPFLAGS="${CPPFLAGS} ${VORBIS_OPEN_CALLBACKS_INCLUDE}"
+
+        cat >conftest.$ac_ext <<_ACEOF
+ /* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <vorbis/vorbisfile.h>
+int
+main ()
+{
+#if !defined(OV_CALLBACKS_NOCLOSE)
+                                    (void) OV_CALLBACKS_NOCLOSE;
+                                #endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+     { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+                PBX_VORBIS_OPEN_CALLBACKS=1
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_VORBIS_OPEN_CALLBACKS 1
+_ACEOF
+
+
+
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	   { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+        CPPFLAGS="${saved_cppflags}"
+    fi
+
+
 ac_ext=cpp
 ac_cpp='$CXXCPP $CPPFLAGS'
 ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'

configure.ac

@@ -2081,6 +2081,7 @@ then
 else
 	AST_EXT_LIB_CHECK([VORBIS], [vorbis], [vorbis_info_init], [vorbis/codec.h], [-lm -lvorbisenc -lvorbisfile])
 fi
+AST_C_DECLARE_CHECK([VORBIS_OPEN_CALLBACKS], [OV_CALLBACKS_NOCLOSE], [vorbis/vorbisfile.h])
 
 AC_LANG_PUSH(C++)
 

formats/format_ogg_vorbis.c

@@ -80,6 +80,27 @@ struct ogg_vorbis_desc {	/* format specific parameters */
 	int eos;
 };
 
+#if !defined(HAVE_VORBIS_OPEN_CALLBACKS)
+/*
+ * Declared for backward compatibility with vorbisfile v1.1.2.
+ * Code taken from vorbisfile.h v1.2.0.
+ */
+static int _ov_header_fseek_wrap(FILE *f, ogg_int64_t off, int whence)
+{
+	if (f == NULL) {
+		return -1;
+	}
+	return fseek(f, off, whence);
+}
+
+static ov_callbacks OV_CALLBACKS_NOCLOSE = {
+  (size_t (*)(void *, size_t, size_t, void *))  fread,
+  (int (*)(void *, ogg_int64_t, int))           _ov_header_fseek_wrap,
+  (int (*)(void *))                             NULL,
+  (long (*)(void *))                            ftell
+};
+#endif	/* !defined(HAVE_VORBIS_OPEN_CALLBACKS) */
+
 /*!
  * \brief Create a new OGG/Vorbis filestream and set it up for reading.
  * \param s File that points to on disk storage of the OGG/Vorbis data.

include/asterisk/autoconfig.h.in

@@ -1009,6 +1009,9 @@
 /* Define to 1 if you have the Vorbis library. */
 #undef HAVE_VORBIS
 
+/* Define if your system has OV_CALLBACKS_NOCLOSE declared. */
+#undef HAVE_VORBIS_OPEN_CALLBACKS
+
 /* Define if your system has the VoiceTronix API libraries. */
 #undef HAVE_VPB