Make VisualStudio ignore the crypto stuff

Add stubs for the crypto functions so we can refer to them, even if we
never use them.

build/kvazaar_lib/kvazaar_lib.vcxproj

@@ -125,6 +125,7 @@
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\src\extras\crypto.cpp" />
     <ClCompile Include="..\..\src\extras\libmd5.c" />
     <ClCompile Include="..\..\src\input_frame_buffer.c" />
     <ClCompile Include="..\..\src\kvazaar.c" />
@@ -177,6 +178,7 @@
     <ClCompile Include="..\..\src\strategies\strategies-quant.c" />
     <ClInclude Include="..\..\src\checkpoint.h" />
     <ClInclude Include="..\..\src\cu.h" />
+    <ClInclude Include="..\..\src\extras\crypto.h" />
     <ClInclude Include="..\..\src\extras\libmd5.h" />
     <ClInclude Include="..\..\src\image.h" />
     <ClInclude Include="..\..\src\imagelist.h" />

build/kvazaar_lib/kvazaar_lib.vcxproj.filters

@@ -217,6 +217,7 @@
       <Filter>Optimization\strategies\avx2</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\extras\libmd5.c" />
+    <ClCompile Include="..\..\src\extras\crypto.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\src\bitstream.h">
@@ -403,6 +404,7 @@
       <Filter>Optimization\strategies\avx2</Filter>
     </ClInclude>
     <ClInclude Include="..\..\src\extras\libmd5.h" />
+    <ClInclude Include="..\..\src\extras\crypto.h" />
   </ItemGroup>
   <ItemGroup>
     <YASM Include="..\..\src\extras\x86inc.asm">

src/encoder_state-ctors_dtors.c

@@ -106,8 +106,12 @@ static int encoder_state_config_tile_init(encoder_state_t * const state,
   }
   state->tile->id = encoder->tiles_tile_id[state->tile->lcu_offset_in_ts];
   
+  state->tile->dbs_g = NULL;
+  if (state->encoder_control->cfg->crypto_features) {
     state->tile->dbs_g = InitC();
+  }
   state->tile->m_prev_pos = 0;
+
   return 1;
 }
 
@@ -119,7 +123,9 @@ static void encoder_state_config_tile_finalize(encoder_state_t * const state) {
   
   kvz_videoframe_free(state->tile->frame);
   state->tile->frame = NULL;
+  if (state->encoder_control->cfg->crypto_features) {
     DeleteCryptoC(state->tile->dbs_g);
+  }
   FREE_POINTER(state->tile->wf_jobs);
 }
 

src/extras/crypto.cpp

@@ -1,4 +1,9 @@
 #include <extras/crypto.h>
+
+#ifndef KVZ_SEL_ENCRYPTION
+extern int kvz_make_vs_ignore_crypto_not_having_symbols;
+int kvz_make_vs_ignore_crypto_not_having_symbols = 0;
+#else
 #include <cryptopp/aes.h>
 #include <cryptopp/modes.h>
 #include <cryptopp/osrng.h>
@@ -117,3 +122,5 @@ void DecryptC(Crypto_Handle hdl, const unsigned char *in_stream, int size_bits,
 void DeleteCryptoC(Crypto_Handle hdl) {
     DeleteCryptoC(hdl);
 }
+
+#endif // KVZ_SEL_ENCRYPTION

src/extras/crypto.h

@@ -1,3 +1,13 @@
+#ifndef CRYPTO_H_
+#define CRYPTO_H_
+
+#include "global.h"
+
+#ifdef KVZ_SEL_ENCRYPTION
+#define STUBBED extern
+#else
+#define STUBBED static
+#endif
 
 #include <stdio.h>
 #include <math.h>
@@ -6,14 +16,57 @@
 extern "C" {
 #endif
     typedef void* Crypto_Handle;
-    Crypto_Handle InitC();
-    void DecryptC(Crypto_Handle hdl, const unsigned char *in_stream, int size_bits, unsigned char  *out_stream);
+
+    STUBBED Crypto_Handle InitC();
+    STUBBED void DecryptC(Crypto_Handle hdl, const unsigned char *in_stream, int size_bits, unsigned char  *out_stream);
 #if AESEncryptionStreamMode
-    unsigned int ff_get_key (Crypto_Handle *hdl, int nb_bits);
+    STUBBED unsigned int ff_get_key(Crypto_Handle *hdl, int nb_bits);
 #endif
-    void DeleteCryptoC(Crypto_Handle hdl);
+    STUBBED void DeleteCryptoC(Crypto_Handle hdl);
 
 #ifdef __cplusplus
 }
 #endif
 
+
+#ifndef KVZ_SEL_ENCRYPTION
+// Provide static stubs to allow linking without libcryptopp and allows us to
+// avoid sprinkling ifdefs everywhere and having a bunch of code that's not
+// compiled during normal development.
+// Provide them in the header so we can avoid compiling the cpp file, which
+// means we don't need a C++ compiler when crypto is not enabled.
+
+#include <assert.h>
+
+static INLINE Crypto_Handle InitC()
+{
+  // Stub.
+  assert(0);
+  return 0;
+}
+
+static INLINE void DecryptC(Crypto_Handle hdl, const unsigned char *in_stream,
+              int size_bits, unsigned char  *out_stream)
+{
+  // Stub.
+  assert(0);
+}
+
+#if AESEncryptionStreamMode
+static INLINE unsigned int ff_get_key(Crypto_Handle *hdl, int nb_bits)
+{
+  // Stub.
+  assert(0);
+  return 0;
+}
+#endif
+
+static INLINE void DeleteCryptoC(Crypto_Handle hdl)
+{
+  // Stub.
+  assert(0);
+}
+
+#endif // KVZ_SEL_ENCRYPTION
+
+#endif // CRYPTO_H_