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