From 0696d16eb80ad05ab6ded1b1d1eb0fad714c4706 Mon Sep 17 00:00:00 2001
From: nyanmisaka <nst799610810@gmail.com>
Date: Thu, 6 Oct 2022 19:49:32 +0800
Subject: [PATCH] Revert "fix(fairplay): Re-add initDataTransform config
 (#4231)"

This reverts commit 9a6f150c082e477f9dae95c4436d6ff764481d02.
---
 docs/tutorials/upgrade.md        |  3 ++-
 externs/shaka/player.js          | 11 -----------
 lib/media/drm_engine.js          | 16 ----------------
 lib/util/player_configuration.js |  5 -----
 4 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/docs/tutorials/upgrade.md b/docs/tutorials/upgrade.md
index 800bffbcaaa..9a581e1c784 100644
--- a/docs/tutorials/upgrade.md
+++ b/docs/tutorials/upgrade.md
@@ -42,7 +42,8 @@ application:
       `manifest.defaultPresentationDelay` (deprecated in v3.0.0)
     - Configuration of factories should be plain factory functions, not
       constructors; these will not be invoked with `new` (deprecated in v3.1.0)
-    - `drm.initDataTransform` now defaults to a no-op
+    - `drm.initDataTransform` has been removed (no longer needed since the
+      minimum supported version of iOS is now 13)
     - `streaming.smallGapLimit` and `streaming.jumpLargeGaps` have been removed;
       all gaps will now be jumped
     - `manifest.hls.useFullSegmentsForStartTime` has been removed; this setting
diff --git a/externs/shaka/player.js b/externs/shaka/player.js
index bb7b299554d..ca73947a39a 100644
--- a/externs/shaka/player.js
+++ b/externs/shaka/player.js
@@ -618,9 +618,6 @@ shaka.extern.AdvancedDrmConfiguration;
  *   clearKeys: !Object.<string, string>,
  *   delayLicenseRequestUntilPlayed: boolean,
  *   advanced: Object.<string, shaka.extern.AdvancedDrmConfiguration>,
- *   initDataTransform:
- *       ((function(!Uint8Array, string, ?shaka.extern.DrmInfo):!Uint8Array)|
- *         undefined),
  *   logLicenseExchange: boolean,
  *   updateExpirationTime: number,
  *   preferredKeySystems: !Array.<string>
@@ -644,14 +641,6 @@ shaka.extern.AdvancedDrmConfiguration;
  *   <i>Optional.</i> <br>
  *   A dictionary which maps key system IDs to advanced DRM configuration for
  *   those key systems.
- * @property
- *     {((function(!Uint8Array, string, ?shaka.extern.DrmInfo):!Uint8Array)|
- *        undefined)}
- *   initDataTransform
- *   <i>Optional.</i><br>
- *   If given, this function is called with the init data from the
- *   manifest/media and should return the (possibly transformed) init data to
- *   pass to the browser.
  * @property {boolean} logLicenseExchange
  *   <i>Optional.</i><br>
  *   If set to <code>true</code>, prints logs containing the license exchange.
diff --git a/lib/media/drm_engine.js b/lib/media/drm_engine.js
index 0603dd34169..594655928a3 100644
--- a/lib/media/drm_engine.js
+++ b/lib/media/drm_engine.js
@@ -1253,22 +1253,6 @@ shaka.media.DrmEngine = class {
     };
     this.activeSessions_.set(session, metadata);
 
-    try {
-      initData = this.config_.initDataTransform(
-          initData, initDataType, this.currentDrmInfo_);
-    } catch (error) {
-      let shakaError = error;
-      if (!(error instanceof shaka.util.Error)) {
-        shakaError = new shaka.util.Error(
-            shaka.util.Error.Severity.CRITICAL,
-            shaka.util.Error.Category.DRM,
-            shaka.util.Error.Code.INIT_DATA_TRANSFORM_ERROR,
-            error);
-      }
-      this.onError_(shakaError);
-      return;
-    }
-
     if (this.config_.logLicenseExchange) {
       const str = shaka.util.Uint8ArrayUtils.toBase64(initData);
       shaka.log.info('EME init data: type=', initDataType, 'data=', str);
diff --git a/lib/util/player_configuration.js b/lib/util/player_configuration.js
index 40112147d86..f795e427019 100644
--- a/lib/util/player_configuration.js
+++ b/lib/util/player_configuration.js
@@ -66,11 +66,6 @@ shaka.util.PlayerConfiguration = class {
       clearKeys: {},  // key is arbitrary key system ID, value must be string
       advanced: {},    // key is arbitrary key system ID, value is a record type
       delayLicenseRequestUntilPlayed: false,
-      initDataTransform: (initData, initDataType, drmInfo) => {
-        return shaka.util.ConfigUtils.referenceParametersAndReturn(
-            [initData, initDataType, drmInfo],
-            initData);
-      },
       logLicenseExchange: false,
       updateExpirationTime: 1,
       preferredKeySystems: [],