fftools/ffmpeg_dec: split Decoder into a private and public part

Similar to what is currently done for other components, e.g. (de)muxers.
There is nothing in the public part currently, but that will change in
future commits.

1 files changed, 3 insertions, 1 deletions

diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index 3014a626b4..429c1aba85 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -280,7 +280,9 @@ typedef struct FilterGraph {
     int         nb_outputs;
 } FilterGraph;
 
-typedef struct Decoder Decoder;
+typedef struct Decoder {
+    char dummy;
+} Decoder;
 
 typedef struct InputStream {
     const AVClass *class;