avformat/ast: Deduplicate codec tags lists

Also saves a relocation.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/ast.c

@@ -19,7 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "avformat.h"
+#include <stddef.h>
+#include "libavcodec/codec_id.h"
 #include "internal.h"
 
 const AVCodecTag ff_codec_ast_tags[] = {
@@ -27,3 +28,5 @@ const AVCodecTag ff_codec_ast_tags[] = {
     { AV_CODEC_ID_PCM_S16BE_PLANAR,   1 },
     { AV_CODEC_ID_NONE,               0 },
 };
+
+const AVCodecTag *const ff_ast_codec_tags_list[] = { ff_codec_ast_tags, NULL };

libavformat/ast.h

@@ -26,5 +26,6 @@
 #include "internal.h"
 
 extern const AVCodecTag ff_codec_ast_tags[];
+extern const AVCodecTag *const ff_ast_codec_tags_list[];
 
 #endif /* AVFORMAT_AST_H */

libavformat/astdec.c

@@ -118,5 +118,5 @@ AVInputFormat ff_ast_demuxer = {
     .read_packet    = ast_read_packet,
     .extensions     = "ast",
     .flags          = AVFMT_GENERIC_INDEX,
-    .codec_tag      = (const AVCodecTag* const []){ff_codec_ast_tags, 0},
+    .codec_tag      = ff_ast_codec_tags_list,
 };

libavformat/astenc.c

@@ -207,5 +207,5 @@ AVOutputFormat ff_ast_muxer = {
     .write_packet      = ast_write_packet,
     .write_trailer     = ast_write_trailer,
     .priv_class        = &ast_muxer_class,
-    .codec_tag         = (const AVCodecTag* const []){ff_codec_ast_tags, 0},
+    .codec_tag         = ff_ast_codec_tags_list,
 };