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diff --git a/src/utils/logging.h b/src/utils/logging.h
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+++ b/src/utils/logging.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2019 The libgav1 Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LIBGAV1_SRC_UTILS_LOGGING_H_
+#define LIBGAV1_SRC_UTILS_LOGGING_H_
+
+#include <cstddef>
+
+#include "src/utils/compiler_attributes.h"
+
+#if !defined(LIBGAV1_ENABLE_LOGGING)
+#if defined(NDEBUG) || defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
+#define LIBGAV1_ENABLE_LOGGING 0
+#else
+#define LIBGAV1_ENABLE_LOGGING 1
+#endif
+#endif
+
+#if LIBGAV1_ENABLE_LOGGING
+// LIBGAV1_DLOG(severity, printf-format-string)
+// Debug logging that can optionally be enabled in release builds by explicitly
+// setting LIBGAV1_ENABLE_LOGGING.
+// Severity is given as an all-caps version of enum LogSeverity with the
+// leading 'k' removed: LIBGAV1_DLOG(INFO, "...");
+#define LIBGAV1_DLOG(severity, ...)                                       \
+  do {                                                                    \
+    constexpr const char* libgav1_logging_internal_basename =             \
+        ::libgav1::internal::Basename(__FILE__, sizeof(__FILE__) - 1);    \
+    ::libgav1::internal::Log(LIBGAV1_LOGGING_INTERNAL_##severity,         \
+                             libgav1_logging_internal_basename, __LINE__, \
+                             __VA_ARGS__);                                \
+  } while (0)
+#else
+#define LIBGAV1_DLOG(severity, ...) \
+  do {                              \
+  } while (0)
+#endif  // LIBGAV1_ENABLE_LOGGING
+
+#define LIBGAV1_LOGGING_INTERNAL_ERROR ::libgav1::internal::LogSeverity::kError
+#define LIBGAV1_LOGGING_INTERNAL_WARNING \
+  ::libgav1::internal::LogSeverity::kWarning
+#define LIBGAV1_LOGGING_INTERNAL_INFO ::libgav1::internal::LogSeverity::kInfo
+
+namespace libgav1 {
+namespace internal {
+
+enum class LogSeverity : int {
+  kError,
+  kWarning,
+  kInfo,
+};
+
+// Helper function to implement LIBGAV1_DLOG
+// Logs |format, ...| at |severity| level, reporting it as called from
+// |file|:|line|.
+void Log(libgav1::internal::LogSeverity severity, const char* file, int line,
+         const char* format, ...) LIBGAV1_PRINTF_ATTRIBUTE(4, 5);
+
+// Compile-time function to get the 'base' file_name, that is, the part of
+// a file_name after the last '/' or '\' path separator. The search starts at
+// the end of the string; the second parameter is the length of the string.
+constexpr const char* Basename(const char* file_name, size_t offset) {
+  return (offset == 0 || file_name[offset - 1] == '/' ||
+          file_name[offset - 1] == '\\')
+             ? file_name + offset
+             : Basename(file_name, offset - 1);
+}
+
+}  // namespace internal
+}  // namespace libgav1
+
+#endif  // LIBGAV1_SRC_UTILS_LOGGING_H_