avformat: Avoid allocation for AVFormatInternal

Do this by allocating AVFormatContext together with the data that is
currently in AVFormatInternal; or rather: Put AVFormatContext at the
beginning of a new structure called FFFormatContext (which encompasses
more than just the internal fields and is a proper context in its own
right, hence the name) and remove AVFormatInternal altogether.

The biggest simplifications occured in avformat_alloc_context(), where
one can now simply call avformat_free_context() in case of errors.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index c6c015f8f0..50f8b64d10 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -845,7 +845,7 @@ static int nut_read_header(AVFormatContext *s)
         decode_info_header(nut);
     }
 
-    s->internal->data_offset = pos - 8;
+    ffformatcontext(s)->data_offset = pos - 8;
 
     if (bc->seekable & AVIO_SEEKABLE_NORMAL) {
         int64_t orig_pos = avio_tell(bc);