lib/gcrypt/MD5: add wrapper in lib/crypto/

Prepare for using other crypto libraries, e.g. FFmpeg's libavutil.

src/input/plugins/QobuzClient.cxx

@@ -18,7 +18,7 @@
  */
 
 #include "QobuzClient.hxx"
-#include "lib/gcrypt/MD5.hxx"
+#include "lib/crypto/MD5.hxx"
 #include "util/ConstBuffer.hxx"
 
 #include <stdexcept>

src/input/plugins/QobuzInputPlugin.cxx

@@ -27,7 +27,7 @@
 #include "input/FailingInputStream.hxx"
 #include "input/InputPlugin.hxx"
 #include "config/Block.hxx"
-#include "lib/gcrypt/Init.hxx"
+#include "lib/crypto/MD5.hxx"
 #include "thread/Mutex.hxx"
 #include "util/StringCompare.hxx"
 
@@ -123,7 +123,7 @@ QobuzInputStream::OnQobuzTrackError(std::exception_ptr e) noexcept
 static void
 InitQobuzInput(EventLoop &event_loop, const ConfigBlock &block)
 {
-	Gcrypt::Init();
+	GlobalInitMD5();
 
 	const char *base_url = block.GetBlockValue("base_url",
 						   "http://www.qobuz.com/api.json/0.2/");

src/input/plugins/meson.build

@@ -42,7 +42,7 @@ qobuz_feature = get_option('qobuz')
 if qobuz_feature.disabled()
   enable_qobuz = false
 else
-  enable_qobuz = curl_dep.found() and yajl_dep.found() and gcrypt_dep.found()
+  enable_qobuz = curl_dep.found() and yajl_dep.found() and crypto_md5_dep.found()
   if not enable_qobuz and qobuz_feature.enabled()
     error('Qobuz requires CURL, libyajl and libgcrypt')
   endif
@@ -93,7 +93,7 @@ input_plugins = static_library(
     nfs_dep,
     smbclient_dep,
     yajl_dep,
-    gcrypt_dep,
+    crypto_md5_dep,
   ],
 )