michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef MediaBufferDecoder_h_
michael@0: #define MediaBufferDecoder_h_
michael@0: 
michael@0: #include "nsWrapperCache.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsIThreadPool.h"
michael@0: #include "nsString.h"
michael@0: #include "nsTArray.h"
michael@0: #include "mozilla/dom/TypedArray.h"
michael@0: #include "mozilla/MemoryReporting.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: namespace dom {
michael@0: class AudioBuffer;
michael@0: class AudioContext;
michael@0: class DecodeErrorCallback;
michael@0: class DecodeSuccessCallback;
michael@0: }
michael@0: 
michael@0: struct WebAudioDecodeJob MOZ_FINAL
michael@0: {
michael@0:   // You may omit both the success and failure callback, or you must pass both.
michael@0:   // The callbacks are only necessary for asynchronous operation.
michael@0:   WebAudioDecodeJob(const nsACString& aContentType,
michael@0:                     dom::AudioContext* aContext,
michael@0:                     dom::DecodeSuccessCallback* aSuccessCallback = nullptr,
michael@0:                     dom::DecodeErrorCallback* aFailureCallback = nullptr);
michael@0:   ~WebAudioDecodeJob();
michael@0: 
michael@0:   NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebAudioDecodeJob)
michael@0:   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebAudioDecodeJob)
michael@0: 
michael@0:   enum ErrorCode {
michael@0:     NoError,
michael@0:     UnknownContent,
michael@0:     UnknownError,
michael@0:     InvalidContent,
michael@0:     NoAudio
michael@0:   };
michael@0: 
michael@0:   typedef void (WebAudioDecodeJob::*ResultFn)(ErrorCode);
michael@0:   typedef nsAutoArrayPtr<float> ChannelBuffer;
michael@0: 
michael@0:   void OnSuccess(ErrorCode /* ignored */);
michael@0:   void OnFailure(ErrorCode aErrorCode);
michael@0: 
michael@0:   bool AllocateBuffer();
michael@0: 
michael@0:   size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
michael@0: 
michael@0:   nsCString mContentType;
michael@0:   uint32_t mWriteIndex;
michael@0:   nsRefPtr<dom::AudioContext> mContext;
michael@0:   nsRefPtr<dom::DecodeSuccessCallback> mSuccessCallback;
michael@0:   nsRefPtr<dom::DecodeErrorCallback> mFailureCallback; // can be null
michael@0:   nsRefPtr<dom::AudioBuffer> mOutput;
michael@0:   FallibleTArray<ChannelBuffer> mChannelBuffers;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * This class is used to decode media buffers on a dedicated threadpool.
michael@0:  *
michael@0:  * This class manages the resources that it uses internally (such as the
michael@0:  * thread-pool) and provides a clean external interface.
michael@0:  */
michael@0: class MediaBufferDecoder
michael@0: {
michael@0: public:
michael@0:   void AsyncDecodeMedia(const char* aContentType, uint8_t* aBuffer,
michael@0:                         uint32_t aLength, WebAudioDecodeJob& aDecodeJob);
michael@0: 
michael@0:   ~MediaBufferDecoder() { Shutdown(); }
michael@0:   void Shutdown();
michael@0: 
michael@0:   size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
michael@0:   {
michael@0:     return 0;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   bool EnsureThreadPoolInitialized();
michael@0: 
michael@0: private:
michael@0:   nsCOMPtr<nsIThreadPool> mThreadPool;
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif
michael@0: