The Tor Browser: content/media/webaudio/MediaBufferDecoder.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     7 #ifndef MediaBufferDecoder_h_

     8 #define MediaBufferDecoder_h_

    10 #include "nsWrapperCache.h"

    11 #include "nsCOMPtr.h"

    12 #include "nsAutoPtr.h"

    13 #include "nsIThreadPool.h"

    14 #include "nsString.h"

    15 #include "nsTArray.h"

    16 #include "mozilla/dom/TypedArray.h"

    17 #include "mozilla/MemoryReporting.h"

    19 namespace mozilla {

    21 namespace dom {

    22 class AudioBuffer;

    23 class AudioContext;

    24 class DecodeErrorCallback;

    25 class DecodeSuccessCallback;

    26 }

    28 struct WebAudioDecodeJob MOZ_FINAL

    29 {

    30   // You may omit both the success and failure callback, or you must pass both.

    31   // The callbacks are only necessary for asynchronous operation.

    32   WebAudioDecodeJob(const nsACString& aContentType,

    33                     dom::AudioContext* aContext,

    34                     dom::DecodeSuccessCallback* aSuccessCallback = nullptr,

    35                     dom::DecodeErrorCallback* aFailureCallback = nullptr);

    36   ~WebAudioDecodeJob();

    38   NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebAudioDecodeJob)

    39   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebAudioDecodeJob)

    41   enum ErrorCode {

    42     NoError,

    43     UnknownContent,

    44     UnknownError,

    45     InvalidContent,

    46     NoAudio

    47   };

    49   typedef void (WebAudioDecodeJob::*ResultFn)(ErrorCode);

    50   typedef nsAutoArrayPtr<float> ChannelBuffer;

    52   void OnSuccess(ErrorCode /* ignored */);

    53   void OnFailure(ErrorCode aErrorCode);

    55   bool AllocateBuffer();

    57   size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;

    59   nsCString mContentType;

    60   uint32_t mWriteIndex;

    61   nsRefPtr<dom::AudioContext> mContext;

    62   nsRefPtr<dom::DecodeSuccessCallback> mSuccessCallback;

    63   nsRefPtr<dom::DecodeErrorCallback> mFailureCallback; // can be null

    64   nsRefPtr<dom::AudioBuffer> mOutput;

    65   FallibleTArray<ChannelBuffer> mChannelBuffers;

    66 };

    68 /**

    69  * This class is used to decode media buffers on a dedicated threadpool.

    70  *

    71  * This class manages the resources that it uses internally (such as the

    72  * thread-pool) and provides a clean external interface.

    73  */

    74 class MediaBufferDecoder

    75 {

    76 public:

    77   void AsyncDecodeMedia(const char* aContentType, uint8_t* aBuffer,

    78                         uint32_t aLength, WebAudioDecodeJob& aDecodeJob);

    80   ~MediaBufferDecoder() { Shutdown(); }

    81   void Shutdown();

    83   size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const

    84   {

    85     return 0;

    86   }

    88 private:

    89   bool EnsureThreadPoolInitialized();

    91 private:

    92   nsCOMPtr<nsIThreadPool> mThreadPool;

    93 };

    95 }

    97 #endif

The Tor Browser / file revision