| /* |
| * 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 com.google.android.exoplayer2.extractor; |
| |
| import androidx.annotation.Nullable; |
| import com.google.android.exoplayer2.C; |
| import com.google.android.exoplayer2.Format; |
| import com.google.android.exoplayer2.upstream.DataReader; |
| import com.google.android.exoplayer2.util.ParsableByteArray; |
| import java.io.EOFException; |
| import java.io.IOException; |
| |
| /** |
| * A dummy {@link TrackOutput} implementation. |
| */ |
| public final class DummyTrackOutput implements TrackOutput { |
| |
| // Even though read data is discarded, data source implementations could be making use of the |
| // buffer contents. For example, caches. So we cannot use a static field for this which could be |
| // shared between different threads. |
| private final byte[] readBuffer; |
| |
| public DummyTrackOutput() { |
| readBuffer = new byte[4096]; |
| } |
| |
| @Override |
| public void format(Format format) { |
| // Do nothing. |
| } |
| |
| @Override |
| public int sampleData( |
| DataReader input, int length, boolean allowEndOfInput, @SampleDataPart int sampleDataPart) |
| throws IOException { |
| int bytesToSkipByReading = Math.min(readBuffer.length, length); |
| int bytesSkipped = input.read(readBuffer, /* offset= */ 0, bytesToSkipByReading); |
| if (bytesSkipped == C.RESULT_END_OF_INPUT) { |
| if (allowEndOfInput) { |
| return C.RESULT_END_OF_INPUT; |
| } |
| throw new EOFException(); |
| } |
| return bytesSkipped; |
| } |
| |
| @Override |
| public void sampleData(ParsableByteArray data, int length, @SampleDataPart int sampleDataPart) { |
| data.skipBytes(length); |
| } |
| |
| @Override |
| public void sampleMetadata( |
| long timeUs, |
| @C.BufferFlags int flags, |
| int size, |
| int offset, |
| @Nullable CryptoData cryptoData) { |
| // Do nothing. |
| } |
| } |