1 files changed, 144 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/drm/DrmSession.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/drm/DrmSession.java
new file mode 100644
index 0000000000..7a9af2684f
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/drm/DrmSession.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+package org.mozilla.thirdparty.com.google.android.exoplayer2.drm;
+
+import android.media.MediaDrm;
+import androidx.annotation.IntDef;
+import androidx.annotation.Nullable;
+import java.io.IOException;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Map;
+
+/**
+ * A DRM session.
+ */
+public interface DrmSession<T extends ExoMediaCrypto> {
+
+  /**
+   * Invokes {@code newSession's} {@link #acquire()} and {@code previousSession's} {@link
+   * #release()} in that order. Null arguments are ignored. Does nothing if {@code previousSession}
+   * and {@code newSession} are the same session.
+   */
+  static <T extends ExoMediaCrypto> void replaceSession(
+      @Nullable DrmSession<T> previousSession, @Nullable DrmSession<T> newSession) {
+    if (previousSession == newSession) {
+      // Do nothing.
+      return;
+    }
+    if (newSession != null) {
+      newSession.acquire();
+    }
+    if (previousSession != null) {
+      previousSession.release();
+    }
+  }
+
+  /** Wraps the throwable which is the cause of the error state. */
+  class DrmSessionException extends IOException {
+
+    public DrmSessionException(Throwable cause) {
+      super(cause);
+    }
+
+  }
+
+  /**
+   * The state of the DRM session. One of {@link #STATE_RELEASED}, {@link #STATE_ERROR}, {@link
+   * #STATE_OPENING}, {@link #STATE_OPENED} or {@link #STATE_OPENED_WITH_KEYS}.
+   */
+  @Documented
+  @Retention(RetentionPolicy.SOURCE)
+  @IntDef({STATE_RELEASED, STATE_ERROR, STATE_OPENING, STATE_OPENED, STATE_OPENED_WITH_KEYS})
+  @interface State {}
+  /**
+   * The session has been released.
+   */
+  int STATE_RELEASED = 0;
+  /**
+   * The session has encountered an error. {@link #getError()} can be used to retrieve the cause.
+   */
+  int STATE_ERROR = 1;
+  /**
+   * The session is being opened.
+   */
+  int STATE_OPENING = 2;
+  /** The session is open, but does not have keys required for decryption. */
+  int STATE_OPENED = 3;
+  /** The session is open and has keys required for decryption. */
+  int STATE_OPENED_WITH_KEYS = 4;
+
+  /**
+   * Returns the current state of the session, which is one of {@link #STATE_ERROR},
+   * {@link #STATE_RELEASED}, {@link #STATE_OPENING}, {@link #STATE_OPENED} and
+   * {@link #STATE_OPENED_WITH_KEYS}.
+   */
+  @State int getState();
+
+  /** Returns whether this session allows playback of clear samples prior to keys being loaded. */
+  default boolean playClearSamplesWithoutKeys() {
+    return false;
+  }
+
+  /**
+   * Returns the cause of the error state, or null if {@link #getState()} is not {@link
+   * #STATE_ERROR}.
+   */
+  @Nullable
+  DrmSessionException getError();
+
+  /**
+   * Returns a {@link ExoMediaCrypto} for the open session, or null if called before the session has
+   * been opened or after it's been released.
+   */
+  @Nullable
+  T getMediaCrypto();
+
+  /**
+   * Returns a map describing the key status for the session, or null if called before the session
+   * has been opened or after it's been released.
+   *
+   * <p>Since DRM license policies vary by vendor, the specific status field names are determined by
+   * each DRM vendor. Refer to your DRM provider documentation for definitions of the field names
+   * for a particular DRM engine plugin.
+   *
+   * @return A map describing the key status for the session, or null if called before the session
+   *     has been opened or after it's been released.
+   * @see MediaDrm#queryKeyStatus(byte[])
+   */
+  @Nullable
+  Map<String, String> queryKeyStatus();
+
+  /**
+   * Returns the key set id of the offline license loaded into this session, or null if there isn't
+   * one.
+   */
+  @Nullable
+  byte[] getOfflineLicenseKeySetId();
+
+  /**
+   * Increments the reference count. When the caller no longer needs to use the instance, it must
+   * call {@link #release()} to decrement the reference count.
+   */
+  void acquire();
+
+  /**
+   * Decrements the reference count. If the reference count drops to 0 underlying resources are
+   * released, and the instance cannot be re-used.
+   */
+  void release();
+}