diff options
Diffstat (limited to 'src/com/android/tv/tuner/exoplayer/ffmpeg/FfmpegDecoderClient.java')
| -rw-r--r-- | src/com/android/tv/tuner/exoplayer/ffmpeg/FfmpegDecoderClient.java | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/src/com/android/tv/tuner/exoplayer/ffmpeg/FfmpegDecoderClient.java b/src/com/android/tv/tuner/exoplayer/ffmpeg/FfmpegDecoderClient.java new file mode 100644 index 00000000..356636cc --- /dev/null +++ b/src/com/android/tv/tuner/exoplayer/ffmpeg/FfmpegDecoderClient.java @@ -0,0 +1,249 @@ +/* + * Copyright (C) 2017 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 com.android.tv.tuner.exoplayer.ffmpeg; + +import android.content.ComponentName; +import android.content.Context; +import android.content.Intent; +import android.content.ServiceConnection; +import android.os.IBinder; +import android.os.RemoteException; + +import android.support.annotation.MainThread; +import android.support.annotation.WorkerThread; +import android.support.annotation.VisibleForTesting; +import com.google.android.exoplayer.SampleHolder; +import com.android.tv.Features; +import com.android.tv.tuner.exoplayer.audio.AudioDecoder; + +import java.nio.ByteBuffer; + +/** + * The class connects {@link FfmpegDecoderService} to decode audio samples. + * In order to sandbox ffmpeg based decoder, {@link FfmpegDecoderService} is an isolated process + * without any permission and connected by binder. + */ +public class FfmpegDecoderClient extends AudioDecoder { + private static FfmpegDecoderClient sInstance; + + private IFfmpegDecoder mService; + private Boolean mIsAvailable; + + private static final String FFMPEG_DECODER_SERVICE_FILTER = + "com.android.tv.tuner.exoplayer.ffmpeg.IFfmpegDecoder"; + private static final long FFMPEG_SERVICE_CONNECT_TIMEOUT_MS = 500; + + private final ServiceConnection mConnection = new ServiceConnection() { + @Override + public void onServiceConnected(ComponentName className, IBinder service) { + mService = IFfmpegDecoder.Stub.asInterface(service); + synchronized (FfmpegDecoderClient.this) { + try { + mIsAvailable = mService.isAvailable(); + } catch (RemoteException e) { + } + FfmpegDecoderClient.this.notify(); + } + } + + @Override + public void onServiceDisconnected(ComponentName className) { + synchronized (FfmpegDecoderClient.this) { + sInstance.releaseLocked(); + mIsAvailable = false; + mService = null; + } + } + }; + + /** + * Connects to the decoder service for future uses. + * @param context + * @return {@code true} when decoder service is connected. + */ + @MainThread + public synchronized static boolean connect(Context context) { + if (Features.AC3_SOFTWARE_DECODE.isEnabled(context)) { + if (sInstance == null) { + sInstance = new FfmpegDecoderClient(); + Intent intent = + new Intent(FFMPEG_DECODER_SERVICE_FILTER) + .setComponent( + new ComponentName(context, FfmpegDecoderService.class)); + if (context.bindService(intent, sInstance.mConnection, Context.BIND_AUTO_CREATE)) { + return true; + } else { + sInstance = null; + } + } + } + return false; + } + + /** + * Disconnects from the decoder service and release resources. + * @param context + */ + @MainThread + public synchronized static void disconnect(Context context) { + if (sInstance != null) { + synchronized (sInstance) { + sInstance.releaseLocked(); + if (sInstance.mIsAvailable != null && sInstance.mIsAvailable) { + context.unbindService(sInstance.mConnection); + } + sInstance.mIsAvailable = false; + sInstance.mService = null; + } + sInstance = null; + } + } + + /** + * Returns whether service is available or not. + * Before using client, this should be used to check availability. + */ + @WorkerThread + public synchronized static boolean isAvailable() { + if (sInstance != null) { + return sInstance.available(); + } + return false; + } + + /** + * Returns an client instance. + */ + public synchronized static FfmpegDecoderClient getInstance() { + if (sInstance != null) { + sInstance.createDecoder(); + } + return sInstance; + } + + private FfmpegDecoderClient() { + } + + private synchronized boolean available() { + if (mIsAvailable == null) { + try { + this.wait(FFMPEG_SERVICE_CONNECT_TIMEOUT_MS); + } catch (InterruptedException e) { + } + } + return mIsAvailable != null && mIsAvailable == true; + } + + private synchronized void createDecoder() { + if (mIsAvailable == null || mIsAvailable == false) { + return; + } + try { + mService.create(); + } catch (RemoteException e) { + } + } + + private void releaseLocked() { + if (mIsAvailable == null || mIsAvailable == false) { + return; + } + try { + mService.release(); + } catch (RemoteException e) { + } + } + + @Override + public synchronized void release() { + releaseLocked(); + } + + @Override + public synchronized void decode(SampleHolder sampleHolder) { + if (mIsAvailable == null || mIsAvailable == false) { + return; + } + byte[] sampleBytes = new byte [sampleHolder.data.limit()]; + sampleHolder.data.get(sampleBytes, 0, sampleBytes.length); + try { + mService.decode(sampleHolder.timeUs, sampleBytes); + } catch (RemoteException e) { + } + } + + @Override + public synchronized void resetDecoderState(String mimeType) { + if (mIsAvailable == null || mIsAvailable == false) { + return; + } + try { + mService.resetDecoderState(mimeType); + } catch (RemoteException e) { + } + } + + @Override + public synchronized ByteBuffer getDecodedSample() { + if (mIsAvailable == null || mIsAvailable == false) { + return null; + } + try { + byte[] outputBytes = mService.getDecodedSample(); + if (outputBytes != null && outputBytes.length > 0) { + return ByteBuffer.wrap(outputBytes); + } + } catch (RemoteException e) { + } + return null; + } + + @Override + public synchronized long getDecodedTimeUs() { + if (mIsAvailable == null || mIsAvailable == false) { + return 0; + } + try { + return mService.getDecodedTimeUs(); + } catch (RemoteException e) { + } + return 0; + } + + @VisibleForTesting + public boolean testSandboxIsolatedProcess() { + // When testing isolated process, we will check the permission in FfmpegDecoderService. + // If the service have any permission, an exception will be thrown. + try { + mService.testSandboxIsolatedProcess(); + } catch (RemoteException e) { + return false; + } + return true; + } + + @VisibleForTesting + public void testSandboxMinijail() { + // When testing minijail, we will call a system call which is blocked by minijail. In that + // case, the FfmpegDecoderService will be disconnected, we can check the connection status + // to make sure if the minijail works or not. + try { + mService.testSandboxMinijail(); + } catch (RemoteException e) { + } + } +} |