[FFmpeg-cvslog] Fix crash on resolution change (issue 2393).

[Ronald S. Bultje]

ffmpeg | branch: master | Ronald S. Bultje <rsbultje at gmail.com> | Sat Jan 22 14:42:56 2011 +0000| [2ed0f76655a76cc49f8a1a1d59e545f5906e7924] | committer: Michael Niedermayer

Fix crash on resolution change (issue 2393).

Don't free RBSP tables (containing decoded NAL units) on resolution
change, because we actually need this data to decode the frame after
reiniting (with new resolution). Fixed issue 2393.

Signed-off-by: Janne Grunau <janne-ffmpeg at jannau.net>
(cherry picked from commit 9107892624c8f9978489ab5b4c0ef2fc5637fb62)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2ed0f76655a76cc49f8a1a1d59e545f5906e7924
---

 libavcodec/h264.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 52a161b..1990d5d 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -614,7 +614,7 @@ static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t
 }
 
 
-static void free_tables(H264Context *h){
+static void free_tables(H264Context *h, int free_rbsp){
     int i;
     H264Context *hx;
     av_freep(&h->intra4x4_pred_mode);
@@ -637,10 +637,12 @@ static void free_tables(H264Context *h){
         av_freep(&hx->top_borders[1]);
         av_freep(&hx->top_borders[0]);
         av_freep(&hx->s.obmc_scratchpad);
+        if (free_rbsp){
         av_freep(&hx->rbsp_buffer[1]);
         av_freep(&hx->rbsp_buffer[0]);
         hx->rbsp_buffer_size[0] = 0;
         hx->rbsp_buffer_size[1] = 0;
+        }
         if (i) av_freep(&h->thread_context[i]);
     }
 }
@@ -748,7 +750,7 @@ int ff_h264_alloc_tables(H264Context *h){
 
     return 0;
 fail:
-    free_tables(h);
+    free_tables(h, 1);
     return -1;
 }
 
@@ -1776,7 +1778,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
             || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
         if(h != h0)
             return -1;   // width / height changed during parallelized decoding
-        free_tables(h);
+        free_tables(h, 0);
         flush_dpb(s->avctx);
         MPV_common_end(s);
     }
@@ -3331,7 +3333,7 @@ av_cold void ff_h264_free_context(H264Context *h)
 {
     int i;
 
-    free_tables(h); //FIXME cleanup init stuff perhaps
+    free_tables(h, 1); //FIXME cleanup init stuff perhaps
 
     for(i = 0; i < MAX_SPS_COUNT; i++)
         av_freep(h->sps_buffers + i);