1 files changed, 63 insertions, 0 deletions
diff --git a/media/libstagefright/include/Prefetcher.h b/media/libstagefright/include/Prefetcher.h
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+++ b/media/libstagefright/include/Prefetcher.h
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+/*
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef PREFETCHER_H_
+
+#define PREFETCHER_H_
+
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
+#include <utils/threads.h>
+
+namespace android {
+
+struct MediaSource;
+struct PrefetchedSource;
+
+struct Prefetcher : public RefBase {
+    Prefetcher();
+
+    // Given an existing MediaSource returns a new MediaSource
+    // that will benefit from prefetching/caching the original one.
+    sp<MediaSource> addSource(const sp<MediaSource> &source);
+
+    int64_t getCachedDurationUs();
+
+protected:
+    virtual ~Prefetcher();
+
+private:
+    Mutex mLock;
+    Condition mCondition;
+
+    Vector<wp<PrefetchedSource> > mSources;
+    android_thread_id_t mThread;
+    bool mDone;
+    bool mThreadExited;
+
+    void startThread();
+    void stopThread();
+
+    static int ThreadWrapper(void *me);
+    void threadFunc();
+
+    Prefetcher(const Prefetcher &);
+    Prefetcher &operator=(const Prefetcher &);
+};
+
+}  // namespace android
+
+#endif  // PREFETCHER_H_