avformat/img2: Avoid relocations for ff_img_tags

The strings here are so short that using a pointer is wasteful
(the longest string takes nine bytes; on 64 bit systems,
the pointer+padding already take 12 bytes). So avoid them
and add asserts to ensure that no one ever tries to use a too
long tag.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavformat/img2.h b/libavformat/img2.h
index 5fd8ff77fc..e98902c96f 100644
--- a/libavformat/img2.h
+++ b/libavformat/img2.h
@@ -66,7 +66,7 @@ typedef struct VideoDemuxData {
 
 typedef struct IdStrMap {
     enum AVCodecID id;
-    const char *str;
+    char str[12];
 } IdStrMap;
 
 extern const IdStrMap ff_img_tags[];