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comparison: content/media/EncodedBufferCache.h
content/media/EncodedBufferCache.h
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| -1:000000000000 | 0:1e79af199a22 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef EncodedBufferCache_h_ | |
| 8 #define EncodedBufferCache_h_ | |
| 9 | |
| 10 #include "nsCOMPtr.h" | |
| 11 #include "nsTArray.h" | |
| 12 #include "mozilla/Mutex.h" | |
| 13 | |
| 14 struct PRFileDesc; | |
| 15 class nsIDOMBlob; | |
| 16 | |
| 17 namespace mozilla { | |
| 18 | |
| 19 class ReentrantMonitor; | |
| 20 /** | |
| 21 * Data is moved into a temporary file when it grows beyond | |
| 22 * the maximal size passed in the Init function. | |
| 23 * The AppendBuffer and ExtractBlob methods are thread-safe and can be called on | |
| 24 * different threads at the same time. | |
| 25 */ | |
| 26 class EncodedBufferCache | |
| 27 { | |
| 28 public: | |
| 29 EncodedBufferCache(uint32_t aMaxMemoryStorage) | |
| 30 : mFD(nullptr), | |
| 31 mMutex("EncodedBufferCache.Data.Mutex"), | |
| 32 mDataSize(0), | |
| 33 mMaxMemoryStorage(aMaxMemoryStorage), | |
| 34 mTempFileEnabled(false) { } | |
| 35 ~EncodedBufferCache() | |
| 36 { | |
| 37 } | |
| 38 // Append buffers in cache, check if the queue is too large then switch to write buffer to file system | |
| 39 // aBuf will append to mEncodedBuffers or temporary File, aBuf also be cleared | |
| 40 void AppendBuffer(nsTArray<uint8_t> & aBuf); | |
| 41 // Read all buffer from memory or file System, also Remove the temporary file or clean the buffers in memory. | |
| 42 already_AddRefed<nsIDOMBlob> ExtractBlob(const nsAString &aContentType); | |
| 43 | |
| 44 private: | |
| 45 //array for storing the encoded data. | |
| 46 nsTArray<nsTArray<uint8_t> > mEncodedBuffers; | |
| 47 // File handle for the temporary file | |
| 48 PRFileDesc* mFD; | |
| 49 // Used to protect the mEncodedBuffer for avoiding AppendBuffer/Consume on different thread at the same time. | |
| 50 Mutex mMutex; | |
| 51 // the current buffer size can be read | |
| 52 uint64_t mDataSize; | |
| 53 // The maximal buffer allowed in memory | |
| 54 uint32_t mMaxMemoryStorage; | |
| 55 // indicate the buffer is stored on temporary file or not | |
| 56 bool mTempFileEnabled; | |
| 57 }; | |
| 58 | |
| 59 } // namespace mozilla | |
| 60 | |
| 61 #endif |
