Fixes widevine metrics proto serialization

Changes to a much more efficient and more reusable protobuf format for
metrics.

Test: Widevine tests, Google Play and MediaDrm CTS test.
Bug: 73724218

Change-Id: I3299051d7a16bcd7758c8f272415ca40e10c1313

libwvdrmengine/cdm/metrics/src/attribute_handler.cpp

@@ -0,0 +1,89 @@
+// Copyright 2018 Google Inc. All Rights Reserved.
+//
+// This file contains implementations for the AttributeHandler.
+
+#include "attribute_handler.h"
+#include "OEMCryptoCENC.h"
+#include "pow2bucket.h"
+#include "wv_cdm_types.h"
+
+namespace wvcdm {
+namespace metrics {
+
+//
+// Specializations for setting attribute fields.
+//
+template <>
+void SetAttributeField<drm_metrics::Attributes::kErrorCodeFieldNumber,
+                       CdmResponseType>(const CdmResponseType &cdm_error,
+                                        drm_metrics::Attributes *attributes) {
+  attributes->set_error_code(cdm_error);
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kCdmSecurityLevelFieldNumber,
+                       CdmSecurityLevel>(
+    const CdmSecurityLevel &cdm_security_level,
+    drm_metrics::Attributes *attributes) {
+  attributes->set_cdm_security_level(cdm_security_level);
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kSecurityLevelFieldNumber,
+                       SecurityLevel>(const SecurityLevel &security_level,
+                                      drm_metrics::Attributes *attributes) {
+  attributes->set_security_level(security_level);
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kErrorCodeBoolFieldNumber,
+                       bool>(const bool &cdm_error,
+                             drm_metrics::Attributes *attributes) {
+  attributes->set_error_code_bool(cdm_error);
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kOemCryptoResultFieldNumber,
+                       OEMCryptoResult>(
+    const OEMCryptoResult &oem_crypto_result,
+    drm_metrics::Attributes *attributes) {
+  attributes->set_oem_crypto_result(oem_crypto_result);
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kLengthFieldNumber, Pow2Bucket>(
+    const Pow2Bucket &pow2, drm_metrics::Attributes *attributes) {
+  attributes->set_length(pow2.value());
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kEncryptionAlgorithmFieldNumber,
+                       CdmEncryptionAlgorithm>(
+    const CdmEncryptionAlgorithm &encryption_algorithm,
+    drm_metrics::Attributes *attributes) {
+  attributes->set_encryption_algorithm(encryption_algorithm);
+}
+
+template <>
+void SetAttributeField<drm_metrics::Attributes::kSigningAlgorithmFieldNumber,
+                       CdmSigningAlgorithm>(
+    const CdmSigningAlgorithm &signing_algorithm,
+    drm_metrics::Attributes *attributes) {
+  attributes->set_signing_algorithm(signing_algorithm);
+}
+
+template <>
+void SetAttributeField<0, util::Unused>(const util::Unused &,
+                                        drm_metrics::Attributes *) {
+  // Intentionally empty.
+}
+
+// Specializations only used by tests.
+template <>
+void SetAttributeField<drm_metrics::Attributes::kErrorCodeFieldNumber, int>(
+    const int &cdm_error, drm_metrics::Attributes *attributes) {
+  attributes->set_error_code(cdm_error);
+}
+
+}  // namespace metrics
+}  // namespace wvcdm