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-rw-r--r--media/stagefright/MediaBufferGroup.h58
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+/*
+ * Copyright (C) 2009 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 MEDIA_BUFFER_GROUP_H_
+
+#define MEDIA_BUFFER_GROUP_H_
+
+#include <media/stagefright/MediaBuffer.h>
+#include <utils/Errors.h>
+#include <utils/threads.h>
+
+namespace android {
+
+class MediaBuffer;
+class MetaData;
+
+class MediaBufferGroup : public MediaBufferObserver {
+public:
+ MediaBufferGroup();
+ ~MediaBufferGroup();
+
+ void add_buffer(MediaBuffer *buffer);
+
+ // Blocks until a buffer is available and returns it to the caller,
+ // the returned buffer will have a reference count of 1.
+ status_t acquire_buffer(MediaBuffer **buffer);
+
+protected:
+ virtual void signalBufferReturned(MediaBuffer *buffer);
+
+private:
+ friend class MediaBuffer;
+
+ Mutex mLock;
+ Condition mCondition;
+
+ MediaBuffer *mFirstBuffer, *mLastBuffer;
+
+ MediaBufferGroup(const MediaBufferGroup &);
+ MediaBufferGroup &operator=(const MediaBufferGroup &);
+};
+
+} // namespace android
+
+#endif // MEDIA_BUFFER_GROUP_H_