import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@Override
public final void onStart(HostActivity host, Surface surface) {
  // Build the player.
  DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
  trackSelector = buildTrackSelector(host, bandwidthMeter);
  String userAgent = "ExoPlayerPlaybackTests";
  DrmSessionManager<FrameworkMediaCrypto> drmSessionManager = buildDrmSessionManager(userAgent);
  player = buildExoPlayer(host, surface, trackSelector, drmSessionManager);
  player.prepare(buildSource(host, Util.getUserAgent(host, userAgent), bandwidthMeter));
  player.addListener(this);
  player.setAudioDebugListener(this);
  player.setVideoDebugListener(this);
  player.setPlayWhenReady(true);
  actionHandler = new Handler();
  // Schedule any pending actions.
  if (pendingSchedule != null) {
    pendingSchedule.start(player, trackSelector, actionHandler);
    pendingSchedule = null;
  }
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@Override
protected final DefaultDrmSessionManager<FrameworkMediaCrypto> buildDrmSessionManager(
    final String userAgent) {
  DefaultDrmSessionManager<FrameworkMediaCrypto> drmSessionManager = null;
  if (parameters.isWidevineEncrypted) {
    try {
      MediaDrmCallback drmCallback = new HttpMediaDrmCallback(parameters.widevineLicenseUrl,
          new DefaultHttpDataSourceFactory(userAgent));
      drmSessionManager = DefaultDrmSessionManager.newWidevineInstance(drmCallback, null,
          null, null);
      if (!parameters.useL1Widevine) {
        drmSessionManager.setPropertyString(SECURITY_LEVEL_PROPERTY, WIDEVINE_SECURITY_LEVEL_3);
      }
      if (offlineLicenseKeySetId != null) {
        drmSessionManager.setMode(DefaultDrmSessionManager.MODE_PLAYBACK,
            offlineLicenseKeySetId);
      }
    } catch (UnsupportedDrmException e) {
      throw new IllegalStateException(e);
    }
  }
  return drmSessionManager;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param trackType The track type that the renderer handles. One of the {@code C.TRACK_TYPE_*}
 *     constants defined in {@link C}.
 * @param mediaCodecSelector A decoder selector.
 * @param drmSessionManager For use with encrypted media. May be null if support for encrypted
 *     media is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 */
public MediaCodecRenderer(int trackType, MediaCodecSelector mediaCodecSelector,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys) {
  super(trackType);
  Assertions.checkState(Util.SDK_INT >= 16);
  this.mediaCodecSelector = Assertions.checkNotNull(mediaCodecSelector);
  this.drmSessionManager = drmSessionManager;
  this.playClearSamplesWithoutKeys = playClearSamplesWithoutKeys;
  buffer = new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
  flagsOnlyBuffer = DecoderInputBuffer.newFlagsOnlyInstance();
  formatHolder = new FormatHolder();
  decodeOnlyPresentationTimestamps = new ArrayList<>();
  outputBufferInfo = new MediaCodec.BufferInfo();
  codecReconfigurationState = RECONFIGURATION_STATE_NONE;
  codecReinitializationState = REINITIALIZATION_STATE_NONE;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param context A context.
 * @param mediaCodecSelector A decoder selector.
 * @param allowedJoiningTimeMs The maximum duration in milliseconds for which this video renderer
 *     can attempt to seamlessly join an ongoing playback.
 * @param drmSessionManager For use with encrypted content. May be null if support for encrypted
 *     content is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
 *     null if delivery of events is not required.
 * @param eventListener A listener of events. May be null if delivery of events is not required.
 * @param maxDroppedFramesToNotify The maximum number of frames that can be dropped between
 *     invocations of {@link VideoRendererEventListener#onDroppedFrames(int, long)}.
 */
public MediaCodecVideoRenderer(Context context, MediaCodecSelector mediaCodecSelector,
    long allowedJoiningTimeMs, DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys, Handler eventHandler,
    VideoRendererEventListener eventListener, int maxDroppedFramesToNotify) {
  super(C.TRACK_TYPE_VIDEO, mediaCodecSelector, drmSessionManager, playClearSamplesWithoutKeys);
  this.allowedJoiningTimeMs = allowedJoiningTimeMs;
  this.maxDroppedFramesToNotify = maxDroppedFramesToNotify;
  frameReleaseTimeHelper = new VideoFrameReleaseTimeHelper(context);
  eventDispatcher = new EventDispatcher(eventHandler, eventListener);
  deviceNeedsAutoFrcWorkaround = deviceNeedsAutoFrcWorkaround();
  joiningDeadlineMs = C.TIME_UNSET;
  currentWidth = Format.NO_VALUE;
  currentHeight = Format.NO_VALUE;
  currentPixelWidthHeightRatio = Format.NO_VALUE;
  pendingPixelWidthHeightRatio = Format.NO_VALUE;
  scalingMode = C.VIDEO_SCALING_MODE_DEFAULT;
  clearReportedVideoSize();
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@SuppressWarnings("PMD.AvoidCatchingGenericException") // We are forced to catch Exception as ResourceBusyException is minSdk 19
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
@Override
public DrmSession<FrameworkMediaCrypto> acquireSession(Looper playbackLooper, DrmInitData drmInitData) {
    DrmSession<FrameworkMediaCrypto> drmSession;

    try {
        SessionId sessionId = SessionId.of(mediaDrm.openSession());
        FrameworkMediaCrypto mediaCrypto = mediaDrm.createMediaCrypto(sessionId.asBytes());

        mediaDrm.restoreKeys(sessionId.asBytes(), keySetIdToRestore.asBytes());

        drmSession = new LocalDrmSession(mediaCrypto, keySetIdToRestore, sessionId);
    } catch (Exception exception) {
        drmSession = new InvalidDrmSession(new DrmSession.DrmSessionException(exception));
        notifyErrorListener(drmSession);
    }
    return drmSession;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@NonNull
public SimpleExoPlayer create(DrmSessionCreator drmSessionCreator,
                              DefaultDrmSessionManager.EventListener drmSessionEventListener,
                              MediaCodecSelector mediaCodecSelector) {
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager = drmSessionCreator.create(drmSessionEventListener);
    RenderersFactory renderersFactory = new SimpleRenderersFactory(
            context,
            drmSessionManager,
            EXTENSION_RENDERER_MODE_OFF,
            DEFAULT_ALLOWED_VIDEO_JOINING_TIME_MS,
            mediaCodecSelector
    );

    DefaultLoadControl loadControl = new DefaultLoadControl();
    return ExoPlayerFactory.newSimpleInstance(renderersFactory, trackSelector, loadControl);
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param trackType The track type that the renderer handles. One of the {@code C.TRACK_TYPE_*}
 *     constants defined in {@link C}.
 * @param mediaCodecSelector A decoder selector.
 * @param drmSessionManager For use with encrypted media. May be null if support for encrypted
 *     media is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 */
public MediaCodecRenderer(int trackType, MediaCodecSelector mediaCodecSelector,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys) {
  super(trackType);
  Assertions.checkState(Util.SDK_INT >= 16);
  this.mediaCodecSelector = Assertions.checkNotNull(mediaCodecSelector);
  this.drmSessionManager = drmSessionManager;
  this.playClearSamplesWithoutKeys = playClearSamplesWithoutKeys;
  buffer = new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
  formatHolder = new FormatHolder();
  decodeOnlyPresentationTimestamps = new ArrayList<>();
  outputBufferInfo = new MediaCodec.BufferInfo();
  codecReconfigurationState = RECONFIGURATION_STATE_NONE;
  codecReinitializationState = REINITIALIZATION_STATE_NONE;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param context A context.
 * @param mediaCodecSelector A decoder selector.
 * @param allowedJoiningTimeMs The maximum duration in milliseconds for which this video renderer
 *     can attempt to seamlessly join an ongoing playback.
 * @param drmSessionManager For use with encrypted content. May be null if support for encrypted
 *     content is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
 *     null if delivery of events is not required.
 * @param eventListener A listener of events. May be null if delivery of events is not required.
 * @param maxDroppedFramesToNotify The maximum number of frames that can be dropped between
 *     invocations of {@link VideoRendererEventListener#onDroppedFrames(int, long)}.
 */
public MediaCodecVideoRenderer(Context context, MediaCodecSelector mediaCodecSelector,
    long allowedJoiningTimeMs, DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys, Handler eventHandler,
    VideoRendererEventListener eventListener, int maxDroppedFramesToNotify) {
  super(C.TRACK_TYPE_VIDEO, mediaCodecSelector, drmSessionManager, playClearSamplesWithoutKeys);
  this.allowedJoiningTimeMs = allowedJoiningTimeMs;
  this.maxDroppedFramesToNotify = maxDroppedFramesToNotify;
  frameReleaseTimeHelper = new VideoFrameReleaseTimeHelper(context);
  eventDispatcher = new EventDispatcher(eventHandler, eventListener);
  deviceNeedsAutoFrcWorkaround = deviceNeedsAutoFrcWorkaround();
  joiningDeadlineMs = C.TIME_UNSET;
  currentWidth = Format.NO_VALUE;
  currentHeight = Format.NO_VALUE;
  currentPixelWidthHeightRatio = Format.NO_VALUE;
  pendingPixelWidthHeightRatio = Format.NO_VALUE;
  scalingMode = C.VIDEO_SCALING_MODE_DEFAULT;
  clearLastReportedVideoSize();
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
private void buildRenderers(Context context,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager, ArrayList<Renderer> renderersList,
    long allowedVideoJoiningTimeMs) {
  MediaCodecVideoRenderer videoRenderer = new MediaCodecVideoRenderer(context,
      MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT,
      allowedVideoJoiningTimeMs, drmSessionManager, false, mainHandler, componentListener,
      MAX_DROPPED_VIDEO_FRAME_COUNT_TO_NOTIFY);
  renderersList.add(videoRenderer);

  Renderer audioRenderer = new MediaCodecAudioRenderer(MediaCodecSelector.DEFAULT,
      drmSessionManager, true, mainHandler, componentListener,
      AudioCapabilities.getCapabilities(context), AudioManager.STREAM_MUSIC);
  renderersList.add(audioRenderer);

  Renderer textRenderer = new TextRenderer(componentListener, mainHandler.getLooper());
  renderersList.add(textRenderer);

  MetadataRenderer<List<Id3Frame>> id3Renderer = new MetadataRenderer<>(componentListener,
      mainHandler.getLooper(), new Id3Decoder());
  renderersList.add(id3Renderer);
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param context A context.
 * @param mediaCodecSelector A decoder selector.
 * @param videoScalingMode The scaling mode to pass to
 *     {@link MediaCodec#setVideoScalingMode(int)}.
 * @param allowedJoiningTimeMs The maximum duration in milliseconds for which this video renderer
 *     can attempt to seamlessly join an ongoing playback.
 * @param drmSessionManager For use with encrypted content. May be null if support for encrypted
 *     content is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
 *     null if delivery of events is not required.
 * @param eventListener A listener of events. May be null if delivery of events is not required.
 * @param maxDroppedFramesToNotify The maximum number of frames that can be dropped between
 *     invocations of {@link VideoRendererEventListener#onDroppedFrames(int, long)}.
 */
public MediaCodecVideoRenderer(Context context, MediaCodecSelector mediaCodecSelector,
    int videoScalingMode, long allowedJoiningTimeMs,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys, Handler eventHandler,
    VideoRendererEventListener eventListener, int maxDroppedFramesToNotify) {
  super(C.TRACK_TYPE_VIDEO, mediaCodecSelector, drmSessionManager, playClearSamplesWithoutKeys);
  this.videoScalingMode = videoScalingMode;
  this.allowedJoiningTimeMs = allowedJoiningTimeMs;
  this.maxDroppedFramesToNotify = maxDroppedFramesToNotify;
  frameReleaseTimeHelper = new VideoFrameReleaseTimeHelper(context);
  eventDispatcher = new EventDispatcher(eventHandler, eventListener);
  deviceNeedsAutoFrcWorkaround = deviceNeedsAutoFrcWorkaround();
  joiningDeadlineMs = C.TIME_UNSET;
  currentWidth = Format.NO_VALUE;
  currentHeight = Format.NO_VALUE;
  currentPixelWidthHeightRatio = Format.NO_VALUE;
  pendingPixelWidthHeightRatio = Format.NO_VALUE;
  lastReportedWidth = Format.NO_VALUE;
  lastReportedHeight = Format.NO_VALUE;
  lastReportedPixelWidthHeightRatio = Format.NO_VALUE;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * Generates the {@link DrmSessionManager} to use with the {@link RendererProvider}. This will
 * return null on API's < {@value Build.VERSION_CODES#JELLY_BEAN_MR2}
 *
 * @return The {@link DrmSessionManager} to use or <code>null</code>
 */
@Nullable
protected DrmSessionManager<FrameworkMediaCrypto> generateDrmSessionManager() {
    // DRM is only supported on API 18 + in the ExoPlayer
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
        return null;
    }

    // Widevine will capture the majority of use cases however playready is supported on all AndroidTV devices
    UUID uuid = C.WIDEVINE_UUID;

    try {
        return new DefaultDrmSessionManager<>(uuid, FrameworkMediaDrm.newInstance(uuid), new DelegatedMediaDrmCallback(), null, mainHandler, capabilitiesListener);
    } catch (Exception e) {
        Log.d(TAG, "Unable to create a DrmSessionManager due to an exception", e);
        return null;
    }
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@Override
protected DefaultDrmSessionManager<FrameworkMediaCrypto> buildDrmSessionManager(
    final String userAgent) {
  if (widevineLicenseUrl == null) {
    return null;
  }
  try {
    MediaDrmCallback drmCallback = new HttpMediaDrmCallback(widevineLicenseUrl,
        new DefaultHttpDataSourceFactory(userAgent));
    DefaultDrmSessionManager<FrameworkMediaCrypto> drmSessionManager =
        DefaultDrmSessionManager.newWidevineInstance(drmCallback, null, null, null);
    if (!useL1Widevine) {
      drmSessionManager.setPropertyString(
          SECURITY_LEVEL_PROPERTY, WIDEVINE_SECURITY_LEVEL_3);
    }
    if (offlineLicenseKeySetId != null) {
      drmSessionManager.setMode(DefaultDrmSessionManager.MODE_PLAYBACK,
          offlineLicenseKeySetId);
    }
    return drmSessionManager;
  } catch (UnsupportedDrmException e) {
    throw new IllegalStateException(e);
  }
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param trackType The track type that the renderer handles. One of the {@code C.TRACK_TYPE_*}
 *     constants defined in {@link C}.
 * @param mediaCodecSelector A decoder selector.
 * @param drmSessionManager For use with encrypted media. May be null if support for encrypted
 *     media is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 */
public MediaCodecRenderer(int trackType, MediaCodecSelector mediaCodecSelector,
    @Nullable DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys) {
  super(trackType);
  Assertions.checkState(Util.SDK_INT >= 16);
  this.mediaCodecSelector = Assertions.checkNotNull(mediaCodecSelector);
  this.drmSessionManager = drmSessionManager;
  this.playClearSamplesWithoutKeys = playClearSamplesWithoutKeys;
  buffer = new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
  flagsOnlyBuffer = DecoderInputBuffer.newFlagsOnlyInstance();
  formatHolder = new FormatHolder();
  decodeOnlyPresentationTimestamps = new ArrayList<>();
  outputBufferInfo = new MediaCodec.BufferInfo();
  codecReconfigurationState = RECONFIGURATION_STATE_NONE;
  codecReinitializationState = REINITIALIZATION_STATE_NONE;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
/**
 * @param context A context.
 * @param mediaCodecSelector A decoder selector.
 * @param allowedJoiningTimeMs The maximum duration in milliseconds for which this video renderer
 *     can attempt to seamlessly join an ongoing playback.
 * @param drmSessionManager For use with encrypted content. May be null if support for encrypted
 *     content is not required.
 * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
 *     For example a media file may start with a short clear region so as to allow playback to
 *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
 *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
 *     has obtained the keys necessary to decrypt encrypted regions of the media.
 * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
 *     null if delivery of events is not required.
 * @param eventListener A listener of events. May be null if delivery of events is not required.
 * @param maxDroppedFramesToNotify The maximum number of frames that can be dropped between
 *     invocations of {@link VideoRendererEventListener#onDroppedFrames(int, long)}.
 */
public MediaCodecVideoRenderer(Context context, MediaCodecSelector mediaCodecSelector,
    long allowedJoiningTimeMs,
    @Nullable DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    boolean playClearSamplesWithoutKeys, @Nullable Handler eventHandler,
    @Nullable VideoRendererEventListener eventListener, int maxDroppedFramesToNotify) {
  super(C.TRACK_TYPE_VIDEO, mediaCodecSelector, drmSessionManager, playClearSamplesWithoutKeys);
  this.allowedJoiningTimeMs = allowedJoiningTimeMs;
  this.maxDroppedFramesToNotify = maxDroppedFramesToNotify;
  this.context = context.getApplicationContext();
  frameReleaseTimeHelper = new VideoFrameReleaseTimeHelper(context);
  eventDispatcher = new EventDispatcher(eventHandler, eventListener);
  deviceNeedsAutoFrcWorkaround = deviceNeedsAutoFrcWorkaround();
  pendingOutputStreamOffsetsUs = new long[MAX_PENDING_OUTPUT_STREAM_OFFSET_COUNT];
  outputStreamOffsetUs = C.TIME_UNSET;
  joiningDeadlineMs = C.TIME_UNSET;
  currentWidth = Format.NO_VALUE;
  currentHeight = Format.NO_VALUE;
  currentPixelWidthHeightRatio = Format.NO_VALUE;
  pendingPixelWidthHeightRatio = Format.NO_VALUE;
  scalingMode = C.VIDEO_SCALING_MODE_DEFAULT;
  clearReportedVideoSize();
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
private DrmSessionManager<FrameworkMediaCrypto> buildDrmSessionManager(UUID uuid,
                                                                       String licenseUrl, Map<String, String> keyRequestProperties) throws UnsupportedDrmException {
    if (Util.SDK_INT < 18) {
        return null;
    }
    HttpMediaDrmCallback drmCallback = new HttpMediaDrmCallback(licenseUrl,
            buildHttpDataSourceFactory(false), keyRequestProperties);
    return new DefaultDrmSessionManager<>(uuid,
            FrameworkMediaDrm.newInstance(uuid), drmCallback, null, mainHandler, eventLogger);
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@Override
protected void buildVideoRenderers(Context context, Handler mainHandler,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    @ExtensionRendererMode int extensionRendererMode, VideoRendererEventListener eventListener,
    long allowedVideoJoiningTimeMs, ArrayList<Renderer> out) {
  out.add(new DebugMediaCodecVideoRenderer(context, MediaCodecSelector.DEFAULT,
      allowedVideoJoiningTimeMs, mainHandler, drmSessionManager, eventListener,
      MAX_DROPPED_VIDEO_FRAME_COUNT_TO_NOTIFY));
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
public DebugMediaCodecVideoRenderer(Context context, MediaCodecSelector mediaCodecSelector,
    long allowedJoiningTimeMs, Handler eventHandler,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
    VideoRendererEventListener eventListener, int maxDroppedFrameCountToNotify) {
  super(context, mediaCodecSelector, allowedJoiningTimeMs, drmSessionManager, false,
      eventHandler, eventListener, maxDroppedFrameCountToNotify);
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@SuppressWarnings("unused")
protected SimpleExoPlayer buildExoPlayer(HostActivity host, Surface surface,
    MappingTrackSelector trackSelector,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager) {
  SimpleExoPlayer player = ExoPlayerFactory.newSimpleInstance(host, trackSelector,
      new DefaultLoadControl(), drmSessionManager, SimpleExoPlayer.EXTENSION_RENDERER_MODE_OFF,
      0);
  player.setVideoSurface(surface);
  return player;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
@Override
protected SimpleExoPlayer buildExoPlayer(HostActivity host, Surface surface,
    MappingTrackSelector trackSelector,
    DrmSessionManager<FrameworkMediaCrypto> drmSessionManager) {
  SimpleExoPlayer player = new DebugSimpleExoPlayer(host, trackSelector,
      new DefaultLoadControl(), drmSessionManager);
  player.setVideoSurface(surface);
  return player;
}
 

import com.google.android.exoplayer2.drm.FrameworkMediaCrypto; //导入依赖的package包/类
LocalDrmSessionManager(KeySetId keySetIdToRestore,
                       ExoMediaDrm<FrameworkMediaCrypto> mediaDrm,
                       UUID drmScheme,
                       Handler handler,
                       DefaultDrmSessionManager.EventListener eventListener) {
    this.keySetIdToRestore = keySetIdToRestore;
    this.mediaDrm = mediaDrm;
    this.eventListener = eventListener;
    this.drmScheme = drmScheme;
    this.handler = handler;
}