1a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen/* 2a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * Copyright (C) 2012 The Android Open Source Project 3a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * 4a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * Licensed under the Apache License, Version 2.0 (the "License"); 5a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * you may not use this file except in compliance with the License. 6a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * You may obtain a copy of the License at 7a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * 8a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * http://www.apache.org/licenses/LICENSE-2.0 9a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * 10a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * Unless required by applicable law or agreed to in writing, software 11a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * distributed under the License is distributed on an "AS IS" BASIS, 12a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * See the License for the specific language governing permissions and 14a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * limitations under the License. 15a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen */ 16a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 17a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen#ifndef SKIP_CUT_BUFFER_H_ 18a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 19a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen#define SKIP_CUT_BUFFER_H_ 20a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 21a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen#include <media/stagefright/MediaBuffer.h> 22cb5b766bb0a3ed992998a5bd66de0ee1d2223b81Marco Nelissen#include <media/stagefright/foundation/ABuffer.h> 23a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 24a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissennamespace android { 25a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 26a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen/** 27a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * utility class to cut the start and end off a stream of data in MediaBuffers 28a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen * 29a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen */ 308b71241ce7353731ab75322c46e090ee35014a33Marco Nelissenclass SkipCutBuffer: public RefBase { 31a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen public: 32a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen // 'skip' is the number of bytes to skip from the beginning 33a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen // 'cut' is the number of bytes to cut from the end 34cb5b766bb0a3ed992998a5bd66de0ee1d2223b81Marco Nelissen SkipCutBuffer(int32_t skip, int32_t cut); 35a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 36a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen // Submit one MediaBuffer for skipping and cutting. This may consume all or 37a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen // some of the data in the buffer, or it may add data to it. 38a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen // After this, the caller should continue processing the buffer as usual. 39a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen void submit(MediaBuffer *buffer); 40cb5b766bb0a3ed992998a5bd66de0ee1d2223b81Marco Nelissen void submit(const sp<ABuffer>& buffer); // same as above, but with an ABuffer 41a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen void clear(); 42a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen size_t size(); // how many bytes are currently stored in the buffer 43a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 448b71241ce7353731ab75322c46e090ee35014a33Marco Nelissen protected: 458b71241ce7353731ab75322c46e090ee35014a33Marco Nelissen virtual ~SkipCutBuffer(); 468b71241ce7353731ab75322c46e090ee35014a33Marco Nelissen 47a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen private: 48a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen void write(const char *src, size_t num); 49a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen size_t read(char *dst, size_t num); 50a6cdabf38b29ee98bdb3e874b4e2978dbc409624Marco Nelissen int32_t mSkip; 51a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen int32_t mFrontPadding; 52a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen int32_t mBackPadding; 53a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen int32_t mWriteHead; 54a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen int32_t mReadHead; 55a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen int32_t mCapacity; 56a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen char* mCutBuffer; 57a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen DISALLOW_EVIL_CONSTRUCTORS(SkipCutBuffer); 58a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen}; 59a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 60a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen} // namespace android 61a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen 62a98478bfbcc0f7fb4b164d3dce40ca96df75667dMarco Nelissen#endif // OMX_CODEC_H_ 63