[FFmpeg-cvslog] libavformat/crypto - encourage reads of 4096 bytes

[Simon Hailes]

ffmpeg | branch: master | Simon Hailes <btsimonh at googlemail.com> | Tue Aug 30 08:47:02 2016 +0100| [a2fcacc880ca79b3f3636cf3e78d8c9164067224] | committer: Michael Niedermayer

libavformat/crypto - encourage reads of 4096 bytes

the current implementation reads in chunks of 149x16=2384 bytes.
Seems more logical for it to read in chunks of 4096

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a2fcacc880ca79b3f3636cf3e78d8c9164067224
---

 libavformat/crypto.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/crypto.c b/libavformat/crypto.c
index 2999f50..31a438c 100644
--- a/libavformat/crypto.c
+++ b/libavformat/crypto.c
@@ -26,7 +26,8 @@
 #include "internal.h"
 #include "url.h"
 
-#define MAX_BUFFER_BLOCKS 150
+// encourage reads of 4096 bytes - 1 block is always retained.
+#define MAX_BUFFER_BLOCKS 257
 #define BLOCKSIZE 16
 
 typedef struct CryptoContext {