avcodec: deprecate AVFrame.age

This was intended as an optimisation for skipped blocks in MPEG2
P-frames and never used elsewhere.  Removing this "optimisation"
speeds up MPEG2 decoding by 1-2% (ARM Cortex-A9).

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 1715bbb32b..7f4651b80f 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1004,13 +1004,12 @@ typedef struct AVFrame {
      */
     int quality;
 
+#if FF_API_AVFRAME_AGE
     /**
-     * buffer age (1->was last buffer and dint change, 2->..., ...).
-     * Set to INT_MAX if the buffer has not been used yet.
-     * - encoding: unused
-     * - decoding: MUST be set by get_buffer() for video.
+     * @deprecated unused
      */
-    int age;
+    attribute_deprecated int age;
+#endif
 
     /**
      * is this picture used as reference