@@ -1084,6 +1084,9 @@ HAVE_LIST="

     struct_sockaddr_in6

     struct_sockaddr_sa_len

     struct_sockaddr_storage

+    symver

+    symver_gnu_asm

+    symver_asm_label

     sys_mman_h

     sys_resource_h

     sys_select_h

@@ -1198,6 +1201,8 @@ fast_unaligned_if_any="armv6 ppc x86"

 need_memalign="altivec neon sse"

 inline_asm_deps="!tms470"

+symver_if_any="symver_asm_label symver_gnu_asm"

+

 # subsystems

 mdct_select="fft"

 rdft_select="fft"

@@ -2714,8 +2719,17 @@ check_ldflags '-Wl,-rpath-link,\$(BUILD_ROOT)/libpostproc -Wl,-rpath-link,\$(BUI

 check_ldflags -Wl,-Bsymbolic

 echo "X{};" > $TMPV

-test_ldflags -Wl,--version-script,$TMPV &&

+if test_ldflags -Wl,--version-script,$TMPV; then

     append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'

+    check_cc <<EOF && enable symver_asm_label

+void ff_foo(void) __asm__ ("av_foo@VERSION");

+void ff_foo(void) {}

+EOF

+    check_cc <<EOF && enable symver_gnu_asm

+__asm__(".symver ff_foo,av_foo@VERSION");

+void ff_foo(void) {}

+EOF

+fi

 if enabled small; then

     add_cflags $size_cflags

@@ -283,8 +283,38 @@ AVInputFormat *av_find_input_format(const char *short_name)

     return NULL;

 }

-/* memory handling */

+#if LIBAVFORMAT_VERSION_MAJOR < 53 && CONFIG_SHARED && HAVE_SYMVER

+FF_SYMVER(void, av_destruct_packet_nofree, (AVPacket *pkt), "LIBAVFORMAT_52")

+{

+    av_destruct_packet_nofree(pkt);

+}

+

+FF_SYMVER(void, av_destruct_packet, (AVPacket *pkt), "LIBAVFORMAT_52")

+{

+    av_destruct_packet(pkt);

+}

+

+FF_SYMVER(int, av_new_packet, (AVPacket *pkt, int size), "LIBAVFORMAT_52")

+{

+    return av_new_packet(pkt, size);

+}

+

+FF_SYMVER(int, av_dup_packet, (AVPacket *pkt), "LIBAVFORMAT_52")

+{

+    return av_dup_packet(pkt);

+}

+

+FF_SYMVER(void, av_free_packet, (AVPacket *pkt), "LIBAVFORMAT_52")

+{

+    av_free_packet(pkt);

+}

+FF_SYMVER(void, av_init_packet, (AVPacket *pkt), "LIBAVFORMAT_52")

+{

+    av_log(NULL, AV_LOG_WARNING, "Diverting av_*_packet function calls to libavcodec. Recompile to improve performance\n");

+    av_init_packet(pkt);

+}

+#endif

 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)

 {

@@ -196,4 +196,15 @@

 #   define NULL_IF_CONFIG_SMALL(x) x

 #endif

+#if HAVE_SYMVER_ASM_LABEL

+#   define FF_SYMVER(type, name, args, ver)             \

+    type ff_##name args __asm__ (#name "@" ver);        \

+    type ff_##name args

+#elif HAVE_SYMVER_GNU_ASM

+#   define FF_SYMVER(type, name, args, ver)             \

+    __asm__ (".symver ff_" #name "," #name "@" ver);    \

+    type ff_##name args;                                \

+    type ff_##name args

+#endif

+

 #endif /* AVUTIL_INTERNAL_H */