| /* |
| * 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 android.telephony.mbms; |
| |
| import android.annotation.Nullable; |
| |
| /** |
| * A callback class for use when the application is actively streaming content. The middleware |
| * will provide updates on the status of the stream via this callback. |
| * @hide |
| */ |
| public class StreamingServiceCallback { |
| |
| /** |
| * Indicates broadcast signal strength is not available for this service. |
| * |
| * This may be due to the service no longer being available due to geography |
| * or timing (end of service) or because lack of demand has caused the service |
| * to be delivered via unicast. |
| */ |
| public static final int SIGNAL_STRENGTH_UNAVAILABLE = -1; |
| |
| /** |
| * Called by the middleware when it has detected an error condition in this stream. The |
| * possible error codes are listed in {@link MbmsErrors}. |
| * @param errorCode The error code. |
| * @param message A human-readable message generated by the middleware for debugging purposes. |
| */ |
| public void onError(int errorCode, @Nullable String message) { |
| // default implementation empty |
| } |
| |
| /** |
| * Called to indicate this stream has changed state. |
| * |
| * See {@link StreamingService#STATE_STOPPED}, {@link StreamingService#STATE_STARTED} |
| * and {@link StreamingService#STATE_STALLED}. |
| */ |
| public void onStreamStateUpdated(@StreamingService.StreamingState int state, |
| @StreamingService.StreamingStateChangeReason int reason) { |
| // default implementation empty |
| } |
| |
| /** |
| * Called to indicate the mpd of a the stream has changed. |
| * |
| * Depending on the Dash Client it may need to be either reset |
| * (less drastic, but original spec didn't allow mpd to change so not |
| * always supported) or restarted. |
| * |
| * This may be called when a looping stream hits the end or |
| * when parameters have changed to account for time drift. |
| */ |
| public void onMediaDescriptionUpdated() { |
| // default implementation empty |
| } |
| |
| /** |
| * Broadcast Signal Strength updated. |
| * |
| * This signal strength is the BROADCAST signal strength which, |
| * depending on technology in play and it's deployment, may be |
| * stronger or weaker than the traditional UNICAST signal |
| * strength. It a simple int from 0-4 for valid levels or |
| * {@link #SIGNAL_STRENGTH_UNAVAILABLE} if broadcast is not available |
| * for this service due to timing, geography or popularity. |
| */ |
| public void onBroadcastSignalStrengthUpdated(int signalStrength) { |
| // default implementation empty |
| } |
| |
| /** |
| * Notify of bcast/unicast method being used. |
| * |
| * This is intended to be informational. Indicates |
| * whether we're able to use cell broadcast or have |
| * had to fallback to unicast for this stream. |
| * |
| * This must be called once at the beginning of the stream |
| * around the same time as we change to STATE_STARTED, but |
| * strict ordering is not specified. It must be called |
| * again if we change modes, but if that doesn't happen |
| * the callback won't be used again. |
| * |
| * See {@link StreamingService#BROADCAST_METHOD} and |
| * {@link StreamingService#UNICAST_METHOD} |
| */ |
| public void onStreamMethodUpdated(int methodType) { |
| // default implementation empty |
| } |
| } |