| /* |
| * 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); |
| |
| // If nonBlocking is false, it blocks until a buffer is available and |
| // passes it to the caller in *buffer, while returning OK. |
| // The returned buffer will have a reference count of 1. |
| // If nonBlocking is true and a buffer is not immediately available, |
| // buffer is set to NULL and it returns WOULD_BLOCK. |
| status_t acquire_buffer(MediaBuffer **buffer, bool nonBlocking = false); |
| |
| 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_ |