h264: support frame parameter changes during frame-mt

Fixes CVE-2012-2782.

h264: support frame parameter changes during frame-mt
Fixes CVE-2012-2782.
9e696d2e · Janne Grunau · f1d8763a · 9e696d2e · 9e696d2e
Commit 9e696d2e authored Sep 06, 2012 by Janne Grunau
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Showing with 230 additions and 127 deletions

h264.c libavcodec/h264.c +228 -127

h264.h libavcodec/h264.h +2 -0

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--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
--- a/libavcodec/h264.h
+++ b/libavcodec/h264.h
@@ -448,6 +448,8 @@ typedef struct H264Context {
    int nal_length_size;  ///< Number of bytes used for nal length (1, 2 or 4)
    int got_first;        ///< this flag is != 0 if we've parsed a frame

+    int context_reinitialized;
+
    SPS *sps_buffers[MAX_SPS_COUNT];
    PPS *pps_buffers[MAX_PPS_COUNT];