content/media/webaudio/MediaBufferDecoder.h@97036ab72558 (annotated)
content/media/webaudio/MediaBufferDecoder.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef MediaBufferDecoder_h_ |
| michael@0 | 8 | #define MediaBufferDecoder_h_ |
| michael@0 | 9 | |
| michael@0 | 10 | #include "nsWrapperCache.h" |
| michael@0 | 11 | #include "nsCOMPtr.h" |
| michael@0 | 12 | #include "nsAutoPtr.h" |
| michael@0 | 13 | #include "nsIThreadPool.h" |
| michael@0 | 14 | #include "nsString.h" |
| michael@0 | 15 | #include "nsTArray.h" |
| michael@0 | 16 | #include "mozilla/dom/TypedArray.h" |
| michael@0 | 17 | #include "mozilla/MemoryReporting.h" |
| michael@0 | 18 | |
| michael@0 | 19 | namespace mozilla { |
| michael@0 | 20 | |
| michael@0 | 21 | namespace dom { |
| michael@0 | 22 | class AudioBuffer; |
| michael@0 | 23 | class AudioContext; |
| michael@0 | 24 | class DecodeErrorCallback; |
| michael@0 | 25 | class DecodeSuccessCallback; |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | struct WebAudioDecodeJob MOZ_FINAL |
| michael@0 | 29 | { |
| michael@0 | 30 | // You may omit both the success and failure callback, or you must pass both. |
| michael@0 | 31 | // The callbacks are only necessary for asynchronous operation. |
| michael@0 | 32 | WebAudioDecodeJob(const nsACString& aContentType, |
| michael@0 | 33 | dom::AudioContext* aContext, |
| michael@0 | 34 | dom::DecodeSuccessCallback* aSuccessCallback = nullptr, |
| michael@0 | 35 | dom::DecodeErrorCallback* aFailureCallback = nullptr); |
| michael@0 | 36 | ~WebAudioDecodeJob(); |
| michael@0 | 37 | |
| michael@0 | 38 | NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebAudioDecodeJob) |
| michael@0 | 39 | NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebAudioDecodeJob) |
| michael@0 | 40 | |
| michael@0 | 41 | enum ErrorCode { |
| michael@0 | 42 | NoError, |
| michael@0 | 43 | UnknownContent, |
| michael@0 | 44 | UnknownError, |
| michael@0 | 45 | InvalidContent, |
| michael@0 | 46 | NoAudio |
| michael@0 | 47 | }; |
| michael@0 | 48 | |
| michael@0 | 49 | typedef void (WebAudioDecodeJob::*ResultFn)(ErrorCode); |
| michael@0 | 50 | typedef nsAutoArrayPtr<float> ChannelBuffer; |
| michael@0 | 51 | |
| michael@0 | 52 | void OnSuccess(ErrorCode /* ignored */); |
| michael@0 | 53 | void OnFailure(ErrorCode aErrorCode); |
| michael@0 | 54 | |
| michael@0 | 55 | bool AllocateBuffer(); |
| michael@0 | 56 | |
| michael@0 | 57 | size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const; |
| michael@0 | 58 | |
| michael@0 | 59 | nsCString mContentType; |
| michael@0 | 60 | uint32_t mWriteIndex; |
| michael@0 | 61 | nsRefPtr<dom::AudioContext> mContext; |
| michael@0 | 62 | nsRefPtr<dom::DecodeSuccessCallback> mSuccessCallback; |
| michael@0 | 63 | nsRefPtr<dom::DecodeErrorCallback> mFailureCallback; // can be null |
| michael@0 | 64 | nsRefPtr<dom::AudioBuffer> mOutput; |
| michael@0 | 65 | FallibleTArray<ChannelBuffer> mChannelBuffers; |
| michael@0 | 66 | }; |
| michael@0 | 67 | |
| michael@0 | 68 | /** |
| michael@0 | 69 | * This class is used to decode media buffers on a dedicated threadpool. |
| michael@0 | 70 | * |
| michael@0 | 71 | * This class manages the resources that it uses internally (such as the |
| michael@0 | 72 | * thread-pool) and provides a clean external interface. |
| michael@0 | 73 | */ |
| michael@0 | 74 | class MediaBufferDecoder |
| michael@0 | 75 | { |
| michael@0 | 76 | public: |
| michael@0 | 77 | void AsyncDecodeMedia(const char* aContentType, uint8_t* aBuffer, |
| michael@0 | 78 | uint32_t aLength, WebAudioDecodeJob& aDecodeJob); |
| michael@0 | 79 | |
| michael@0 | 80 | ~MediaBufferDecoder() { Shutdown(); } |
| michael@0 | 81 | void Shutdown(); |
| michael@0 | 82 | |
| michael@0 | 83 | size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const |
| michael@0 | 84 | { |
| michael@0 | 85 | return 0; |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | private: |
| michael@0 | 89 | bool EnsureThreadPoolInitialized(); |
| michael@0 | 90 | |
| michael@0 | 91 | private: |
| michael@0 | 92 | nsCOMPtr<nsIThreadPool> mThreadPool; |
| michael@0 | 93 | }; |
| michael@0 | 94 | |
| michael@0 | 95 | } |
| michael@0 | 96 | |
| michael@0 | 97 | #endif |
| michael@0 | 98 |
