1 files changed, 69 insertions, 0 deletions
diff --git a/tuner/src/com/android/tv/tuner/exoplayer/audio/AudioDecoder.java b/tuner/src/com/android/tv/tuner/exoplayer/audio/AudioDecoder.java
new file mode 100644
index 00000000..64fe1344
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+++ b/tuner/src/com/android/tv/tuner/exoplayer/audio/AudioDecoder.java
@@ -0,0 +1,69 @@
+/*
+ * 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.audio;
+
+import com.google.android.exoplayer.ExoPlaybackException;
+import com.google.android.exoplayer.MediaFormat;
+import com.google.android.exoplayer.SampleHolder;
+import java.nio.ByteBuffer;
+
+/** A base class for audio decoders. */
+public abstract class AudioDecoder {
+
+    /**
+     * Decodes an audio sample.
+     *
+     * @param sampleHolder a holder that contains the sample data and corresponding metadata
+     */
+    public abstract void decode(SampleHolder sampleHolder);
+
+    /** Returns a decoded sample from decoder. */
+    public abstract ByteBuffer getDecodedSample();
+
+    /** Returns the presentation time for the decoded sample. */
+    public abstract long getDecodedTimeUs();
+
+    /**
+     * Clear previous decode state if any. Prepares to decode samples of the specified encoding.
+     * This method should be called before using decode.
+     *
+     * @param mimeType audio encoding
+     */
+    public abstract void resetDecoderState(String mimeType);
+
+    /** Releases all the resource. */
+    public abstract void release();
+
+    /**
+     * Init decoder if needed.
+     *
+     * @param format the format used to initialize decoder
+     */
+    public void maybeInitDecoder(MediaFormat format) throws ExoPlaybackException {
+        // Do nothing.
+    }
+
+    /** Returns input buffer that will be used in decoder. */
+    public ByteBuffer getInputBuffer() {
+        return null;
+    }
+
+    /** Returns the output format. */
+    public android.media.MediaFormat getOutputFormat() {
+        return null;
+    }
+}