avcodec/hevc_ps: do not loose all reference to pointers still in use

Fixes leaving a pointer to unreferenced memory
Fixes Ticket 3115

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ccd6911c189d2f974dcc4095c963dfad14d703d2)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ec0ec65ee46d1367938dc46036fe61ad0384cbd5)

Conflicts:

	libavcodec/hevc.c

4 files changed, 15 insertions, 0 deletions

diff --git a/libavcodec/hevc.c b/libavcodec/hevc.c
index ff42d6e5d3..e0f35286e9 100644
--- a/libavcodec/hevc.c
+++ b/libavcodec/hevc.c
@@ -2700,6 +2700,8 @@ static av_cold int hevc_decode_free(AVCodecContext *avctx)
     for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
         av_buffer_unref(&s->pps_list[i]);
 
+    av_buffer_unref(&s->current_sps);
+
     av_freep(&s->sh.entry_point_offset);
     av_freep(&s->sh.offset);
     av_freep(&s->sh.size);
@@ -2813,6 +2815,10 @@ static int hevc_update_thread_context(AVCodecContext *dst,
         }
     }
 
+    if (s->current_sps && s->sps == (HEVCSPS*)s->current_sps->data)
+        s->sps = NULL;
+    av_buffer_unref(&s->current_sps);
+
     s->seq_decode = s0->seq_decode;
     s->seq_output = s0->seq_output;
     s->pocTid0    = s0->pocTid0;
diff --git a/libavcodec/hevc.h b/libavcodec/hevc.h
index 1a115cf40e..ac539a2a98 100644
--- a/libavcodec/hevc.h
+++ b/libavcodec/hevc.h
@@ -786,6 +786,8 @@ typedef struct HEVCContext {
     AVBufferRef *sps_list[MAX_SPS_COUNT];
     AVBufferRef *pps_list[MAX_PPS_COUNT];
 
+    AVBufferRef *current_sps;
+
     AVBufferPool *tab_mvf_pool;
     AVBufferPool *rpl_tab_pool;
 
diff --git a/libavcodec/hevc_parser.c b/libavcodec/hevc_parser.c
index 642f9752a4..0a75f20d19 100644
--- a/libavcodec/hevc_parser.c
+++ b/libavcodec/hevc_parser.c
@@ -329,6 +329,9 @@ static void hevc_close(AVCodecParserContext *s)
     for (i = 0; i < FF_ARRAY_ELEMS(h->pps_list); i++)
         av_buffer_unref(&h->pps_list[i]);
 
+    av_buffer_unref(&h->current_sps);
+    h->sps = NULL;
+
     for (i = 0; i < h->nals_allocated; i++)
         av_freep(&h->nals[i].rbsp_buffer);
     av_freep(&h->nals);
diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index a382172ad3..99ac8efa0d 100644
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -934,6 +934,10 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
             if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == sps_id)
                 av_buffer_unref(&s->pps_list[i]);
         }
+        if (s->sps_list[sps_id] && s->sps == (HEVCSPS*)s->sps_list[sps_id]->data) {
+            av_buffer_unref(&s->current_sps);
+            s->current_sps = av_buffer_ref(s->sps_list[sps_id]);
+        }
         av_buffer_unref(&s->sps_list[sps_id]);
         s->sps_list[sps_id] = sps_buf;
     }