hevcdec: move the MD5 context out of HEVCSEIPictureHash back into HEVCContext

HEVCSEIPictureHash should store only the information extracted from the
bitstream and exported to the higher layer (the decoder or the parser).
The MD5 context is allocated, used and freed by this higher layer, so it
makes more sense for it to also be stored there.

libavcodec/hevc_sei.h

@@ -23,8 +23,6 @@
 
 #include <stdint.h>
 
-#include "libavutil/md5.h"
-
 #include "get_bits.h"
 
 /**
@@ -59,7 +57,6 @@ typedef enum {
 } HEVC_SEI_Type;
 
 typedef struct HEVCSEIPictureHash {
-    struct AVMD5 *md5_ctx;
     uint8_t       md5[3][16];
     uint8_t is_md5;
 } HEVCSEIPictureHash;

libavcodec/hevcdec.c

@@ -2683,7 +2683,7 @@ static int verify_md5(HEVCContext *s, AVFrame *frame)
         int h = (i == 1 || i == 2) ? (height >> desc->log2_chroma_h) : height;
         uint8_t md5[16];
 
-        av_md5_init(s->sei.picture_hash.md5_ctx);
+        av_md5_init(s->md5_ctx);
         for (j = 0; j < h; j++) {
             const uint8_t *src = frame->data[i] + j * frame->linesize[i];
 #if HAVE_BIGENDIAN
@@ -2693,9 +2693,9 @@ static int verify_md5(HEVCContext *s, AVFrame *frame)
                 src = s->checksum_buf;
             }
 #endif
-            av_md5_update(s->sei.picture_hash.md5_ctx, src, w << pixel_shift);
+            av_md5_update(s->md5_ctx, src, w << pixel_shift);
         }
-        av_md5_final(s->sei.picture_hash.md5_ctx, md5);
+        av_md5_final(s->md5_ctx, md5);
 
         if (!memcmp(md5, s->sei.picture_hash.md5[i], 16)) {
             av_log   (s->avctx, AV_LOG_DEBUG, "plane %d - correct ", i);
@@ -2893,7 +2893,7 @@ static av_cold int hevc_decode_free(AVCodecContext *avctx)
 
     pic_arrays_free(s);
 
-    av_freep(&s->sei.picture_hash.md5_ctx);
+    av_freep(&s->md5_ctx);
 
     av_frame_free(&s->tmp_frame);
     av_frame_free(&s->output_frame);
@@ -2939,8 +2939,8 @@ static av_cold int hevc_init_context(AVCodecContext *avctx)
 
     s->max_ra = INT_MAX;
 
-    s->sei.picture_hash.md5_ctx = av_md5_alloc();
-    if (!s->sei.picture_hash.md5_ctx)
+    s->md5_ctx = av_md5_alloc();
+    if (!s->md5_ctx)
         goto fail;
 
     ff_bswapdsp_init(&s->bdsp);

libavcodec/hevcdec.h

@@ -27,6 +27,7 @@
 #include <stdint.h>
 
 #include "libavutil/buffer.h"
+#include "libavutil/md5.h"
 
 #include "avcodec.h"
 #include "bswapdsp.h"
@@ -462,6 +463,7 @@ typedef struct HEVCContext {
 
     HEVCParamSets ps;
     HEVCSEI sei;
+    struct AVMD5 *md5_ctx;
 
     AVBufferPool *tab_mvf_pool;
     AVBufferPool *rpl_tab_pool;