1 files changed, 72 insertions, 0 deletions
diff --git a/tuner/src/com/android/tv/tuner/exoplayer/buffer/SampleQueue.java b/tuner/src/com/android/tv/tuner/exoplayer/buffer/SampleQueue.java
new file mode 100644
index 00000000..e208f2c2
--- /dev/null
+++ b/tuner/src/com/android/tv/tuner/exoplayer/buffer/SampleQueue.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2015 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.buffer;
+
+import com.google.android.exoplayer.SampleHolder;
+import com.google.android.exoplayer.SampleSource;
+import java.util.LinkedList;
+
+/** A sample queue which reads from the buffer and passes to player pipeline. */
+public class SampleQueue {
+    private final LinkedList<SampleHolder> mQueue = new LinkedList<>();
+    private final SamplePool mSamplePool;
+    private Long mLastQueuedPositionUs = null;
+
+    public SampleQueue(SamplePool samplePool) {
+        mSamplePool = samplePool;
+    }
+
+    public void queueSample(SampleHolder sample) {
+        mQueue.offer(sample);
+        mLastQueuedPositionUs = sample.timeUs;
+    }
+
+    public int dequeueSample(SampleHolder sample) {
+        SampleHolder sampleFromQueue = mQueue.poll();
+        if (sampleFromQueue == null) {
+            return SampleSource.NOTHING_READ;
+        }
+        sample.ensureSpaceForWrite(sampleFromQueue.size);
+        sample.size = sampleFromQueue.size;
+        sample.flags = sampleFromQueue.flags;
+        sample.timeUs = sampleFromQueue.timeUs;
+        sample.clearData();
+        sampleFromQueue.data.position(0).limit(sample.size);
+        sample.data.put(sampleFromQueue.data);
+        mSamplePool.releaseSample(sampleFromQueue);
+        return SampleSource.SAMPLE_READ;
+    }
+
+    public void clear() {
+        while (!mQueue.isEmpty()) {
+            mSamplePool.releaseSample(mQueue.poll());
+        }
+        mLastQueuedPositionUs = null;
+    }
+
+    public Long getLastQueuedPositionUs() {
+        return mLastQueuedPositionUs;
+    }
+
+    public boolean isDurationGreaterThan(long durationUs) {
+        return !mQueue.isEmpty() && mQueue.getLast().timeUs - mQueue.getFirst().timeUs > durationUs;
+    }
+
+    public boolean isEmpty() {
+        return mQueue.isEmpty();
+    }
+}