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Throw from (pre)acquireSession if the DrmSessionManager isn't prepared

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Currently acquireSession() fails with an NPE from
checkNotNull(exoMediaDrm). A follow-up change will result in exoMediaDrm
sometimes being non-null while prepareCount==0 (and in this case we
still want acquireSession() to fail).

preacquireSession() doesn't currently fail in a way the caller can
observe - the same NPE is thrown, but asynchronously and it doesn't
propagate out of the background thread. Throwing directly seems
preferable since it's a clear bug to be trying to preacquire sessions
from an unprepared/released manager.

PiperOrigin-RevId: 375906450
This commit is contained in:
ibaker 2021-05-26 11:29:18 +01:00 committed by Oliver Woodman
parent 50cae4b944
commit 99d3773eb9
2 changed files with 28 additions and 0 deletions
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2
library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
View File

@ -487,6 +487,7 @@ public class DefaultDrmSessionManager implements DrmSessionManager {
Looper playbackLooper,
@Nullable DrmSessionEventListener.EventDispatcher eventDispatcher,
Format format) {
checkState(prepareCallsCount > 0);
initPlaybackLooper(playbackLooper);
PreacquiredSessionReference preacquiredSessionReference =
new PreacquiredSessionReference(eventDispatcher);
@ -500,6 +501,7 @@ public class DefaultDrmSessionManager implements DrmSessionManager {
Looper playbackLooper,
@Nullable DrmSessionEventListener.EventDispatcher eventDispatcher,
Format format) {
checkState(prepareCallsCount > 0);
initPlaybackLooper(playbackLooper);
return acquireSession(
playbackLooper,

26
library/core/src/test/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManagerTest.java
View File

@ -18,6 +18,7 @@ package com.google.android.exoplayer2.drm;
import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;
import android.os.Looper;
import androidx.annotation.Nullable;
@ -407,6 +408,31 @@ public class DefaultDrmSessionManagerTest {
drmSessionManager.release();
}
@Test
public void managerNotPrepared_acquireSessionAndPreacquireSessionFail() throws Exception {
FakeExoMediaDrm.LicenseServer licenseServer =
FakeExoMediaDrm.LicenseServer.allowingSchemeDatas(DRM_SCHEME_DATAS);
DefaultDrmSessionManager drmSessionManager =
new DefaultDrmSessionManager.Builder()
.setUuidAndExoMediaDrmProvider(DRM_SCHEME_UUID, uuid -> new FakeExoMediaDrm())
.build(/* mediaDrmCallback= */ licenseServer);
assertThrows(
Exception.class,
() ->
drmSessionManager.acquireSession(
/* playbackLooper= */ checkNotNull(Looper.myLooper()),
/* eventDispatcher= */ null,
FORMAT_WITH_DRM_INIT_DATA));
assertThrows(
Exception.class,
() ->
drmSessionManager.preacquireSession(
/* playbackLooper= */ checkNotNull(Looper.myLooper()),
/* eventDispatcher= */ null,
FORMAT_WITH_DRM_INIT_DATA));
}
private static void waitForOpenedWithKeys(DrmSession drmSession) {
// Check the error first, so we get a meaningful failure if there's been an error.
assertThat(drmSession.getError()).isNull();