[FFmpeg-cvslog] lavc: preserve the original private data in avcodec_copy_context()

[Anton Khirnov]

ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sat Apr  5 07:38:16 2014 +0200| [efc7df6c1f11b20a48e60c3f743ce2331b661973] | committer: Anton Khirnov

lavc: preserve the original private data in avcodec_copy_context()

If a non-NULL codec was passed to avcodec_alloc_context3(), private data
will be already allocated in dest.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=efc7df6c1f11b20a48e60c3f743ce2331b661973
---

 libavcodec/options.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/libavcodec/options.c b/libavcodec/options.c
index 2e41ce4..c28cbeb 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -137,6 +137,9 @@ AVCodecContext *avcodec_alloc_context3(const AVCodec *codec)
 
 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
 {
+    const AVCodec *orig_codec = dest->codec;
+    uint8_t *orig_priv_data = dest->priv_data;
+
     if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
         av_log(dest, AV_LOG_ERROR,
                "Tried to copy AVCodecContext %p into already-initialized %p\n",
@@ -145,9 +148,10 @@ int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
     }
     memcpy(dest, src, sizeof(*dest));
 
+    dest->priv_data       = orig_priv_data;
+    dest->codec           = orig_codec;
+
     /* set values specific to opened codecs back to their default state */
-    dest->priv_data       = NULL;
-    dest->codec           = NULL;
     dest->slice_offset    = NULL;
     dest->hwaccel         = NULL;
     dest->internal        = NULL;