Source release 19.1.0

README.md

@@ -1,4 +1,4 @@
-# Widevine CE CDM 18.5.0
+# Widevine CE CDM 19.1.0
 
 Released 2024-03-28
 
@@ -10,19 +10,28 @@ following to learn more about the contents of this project and how to use them:
 The [Widevine Developer Site][wv-devsite] documents the CDM API and describes
 how to integrate the CDM into a system.
 
-## New in v18.5.0
+## New in v19.1.0
 
-Note: Releases v18.2-18.4 were skipped so that this release's version number
-matches the OEMCrypto version.
-
-**It is strongly recommended** for partners to update from v18.1 to v18.5 to
-address two major bugs in the CE CDM code which could result in lost offline
-licenses or app crashes. See _Bug Fixes_ for details.
+Note: Release v19.0 was skipped so that this release's version number matches
+the OEMCrypto version.
 
 ## Features
 
-  - Supports up to OEMCrypto v18.5, including new OEMCrypto tests introduced
-    since OEMCrypto v18.1.
+  - Supports up to OEMCrypto v19.1, including new OEMCrypto tests introduced
+    since OEMCrypto v18.
+  - Added support for License Protocol v2.2, which uses SHA256-signed license
+    requests.
+  - Raised the minimum required version of C++ to C++17.
+  - Added a new error code, `kDeviceRevoked`, which requires special handling.
+    - `kDeviceRevoked` may be returned from any method that processes a service
+      response. It indicates that the device's root of trust has been revoked
+      and is no longer trusted.
+    - All service interactions will fail after this, even after a device reboot
+      or factory reset. Apps may want to handle this error by using a different
+      DRM system, if supported.
+    - Devices that support renewal can escape this condition by renewing their
+      root of trust. Root of trust renewal is outside the scope of CE CDM.
+      You'll need to work directly with your Widevine contact.
   - Added additional logging when license request fails, to help diagnose what
     went wrong.
   - Improved support for HDCP v1.0-1.4 version.
@@ -56,6 +65,8 @@ licenses or app crashes. See _Bug Fixes_ for details.
     - Affected partners should check the L3 OEMCrypto documentation for
       details.
   - Added new tests for CE CDM and OEMCrypto v18.5 features.
+  - Improved code performance slightly by reducing copy operations.
+  - Added additional tests to check for problems when moving usage entries.
 
 ### Bug Fixes
 
@@ -89,6 +100,9 @@ licenses or app crashes. See _Bug Fixes_ for details.
     expected behavior.
     - These warning did not cause the tests to fail, but created a lot of noise
       when trying to diagnose other failures
+  - Fixed a potential out-of-bounds read in the logging code for certain
+    invalid severity level values.
+  - Fixed many minor issues identified via static analysis.
 
 [CHANGELOG.md](./CHANGELOG.md) lists the major changes for each past release.