Adds next_partial_gop counter

lib/src/sv_auth.c

@@ -100,14 +100,15 @@ decode_sei_data(signed_video_t *self, const uint8_t *payload, size_t payload_siz
   }
 
   // Compare new with last number of GOPs to detect potential wraparound.
-  int64_t new_partial_gop_number = gop_info->current_partial_gop;
+  int64_t new_partial_gop_number = gop_info->next_partial_gop;
   if (new_partial_gop_number < partial_gop_number) {
     // There is a potential wraparound, but it could also be due to re-ordering of SEIs.
     // Use the distance to determine which of these options is the most likely one.
     if (((int64_t)1 << 31) < partial_gop_number - new_partial_gop_number) {
       gop_info->num_partial_gop_wraparounds++;
     }
   }
+  gop_info->current_partial_gop = gop_info->next_partial_gop;
 
   return status;
 }

lib/src/sv_common.c

@@ -280,6 +280,7 @@ gop_info_reset(gop_info_t *gop_info)
   gop_info->list_idx = 0;
   gop_info->num_partial_gop_wraparounds = 0;
   gop_info->current_partial_gop = 0;
+  gop_info->next_partial_gop = 0;
   gop_info->latest_validated_gop = 0;
   memset(gop_info->linked_hashes, 0, MAX_HASH_SIZE * 2);
 }

lib/src/sv_internal.h

@@ -257,6 +257,7 @@ typedef struct {
   // GOP.
   int64_t current_partial_gop;  // The index of the current GOP, incremented when encoded in the
   // TLV.
+  uint32_t next_partial_gop;  // The index of the next partial GOP (when decoding SEI).
   int64_t latest_validated_gop;  // The index of latest validated GOP.
   int num_partial_gop_wraparounds;  // Tracks number of times the |current_partial_gop|
   // has wrapped around.

lib/src/sv_tlv.c

@@ -332,10 +332,8 @@ decode_general(signed_video_t *self, const uint8_t *data, size_t data_size)
   SV_TRY()
     SV_THROW_IF(version < 1 || version > 4, SV_INCOMPATIBLE_VERSION);
 
-    uint32_t gop_counter = 0;
-    data_ptr += sv_read_32bits(data_ptr, &gop_counter);
-    gop_info->current_partial_gop = gop_counter;
-    DEBUG_LOG("Found GOP counter = %ld", gop_info->current_partial_gop);
+    data_ptr += sv_read_32bits(data_ptr, &gop_info->next_partial_gop);
+    DEBUG_LOG("Found GOP counter = %u", gop_info->next_partial_gop);
     data_ptr += sv_read_16bits(data_ptr, &gop_info->num_sent);
     DEBUG_LOG("Number of sent Bitstream Units = %u", gop_info->num_sent);
 
@@ -382,7 +380,7 @@ decode_general(signed_video_t *self, const uint8_t *data, size_t data_size)
     printf("\nGeneral Information Tag\n");
     printf("             tag version: %u\n", version);
     printf("                   flags: %u\n", flags);
-    printf("           partial GOP #: %ld\n", gop_info->current_partial_gop);
+    printf("           partial GOP #: %u\n", gop_info->next_partial_gop);
     printf("triggered by partial GOP: %s\n", gop_info->triggered_partial_gop ? "true" : "false");
     printf("# hashed Bitstream Units: %u\n", gop_info->num_sent);
     printf("              SW version: %s\n", code_version_str);