1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/MediaBufferDecoder.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,98 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef MediaBufferDecoder_h_
1.11 +#define MediaBufferDecoder_h_
1.12 +
1.13 +#include "nsWrapperCache.h"
1.14 +#include "nsCOMPtr.h"
1.15 +#include "nsAutoPtr.h"
1.16 +#include "nsIThreadPool.h"
1.17 +#include "nsString.h"
1.18 +#include "nsTArray.h"
1.19 +#include "mozilla/dom/TypedArray.h"
1.20 +#include "mozilla/MemoryReporting.h"
1.21 +
1.22 +namespace mozilla {
1.23 +
1.24 +namespace dom {
1.25 +class AudioBuffer;
1.26 +class AudioContext;
1.27 +class DecodeErrorCallback;
1.28 +class DecodeSuccessCallback;
1.29 +}
1.30 +
1.31 +struct WebAudioDecodeJob MOZ_FINAL
1.32 +{
1.33 + // You may omit both the success and failure callback, or you must pass both.
1.34 + // The callbacks are only necessary for asynchronous operation.
1.35 + WebAudioDecodeJob(const nsACString& aContentType,
1.36 + dom::AudioContext* aContext,
1.37 + dom::DecodeSuccessCallback* aSuccessCallback = nullptr,
1.38 + dom::DecodeErrorCallback* aFailureCallback = nullptr);
1.39 + ~WebAudioDecodeJob();
1.40 +
1.41 + NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebAudioDecodeJob)
1.42 + NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebAudioDecodeJob)
1.43 +
1.44 + enum ErrorCode {
1.45 + NoError,
1.46 + UnknownContent,
1.47 + UnknownError,
1.48 + InvalidContent,
1.49 + NoAudio
1.50 + };
1.51 +
1.52 + typedef void (WebAudioDecodeJob::*ResultFn)(ErrorCode);
1.53 + typedef nsAutoArrayPtr<float> ChannelBuffer;
1.54 +
1.55 + void OnSuccess(ErrorCode /* ignored */);
1.56 + void OnFailure(ErrorCode aErrorCode);
1.57 +
1.58 + bool AllocateBuffer();
1.59 +
1.60 + size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
1.61 +
1.62 + nsCString mContentType;
1.63 + uint32_t mWriteIndex;
1.64 + nsRefPtr<dom::AudioContext> mContext;
1.65 + nsRefPtr<dom::DecodeSuccessCallback> mSuccessCallback;
1.66 + nsRefPtr<dom::DecodeErrorCallback> mFailureCallback; // can be null
1.67 + nsRefPtr<dom::AudioBuffer> mOutput;
1.68 + FallibleTArray<ChannelBuffer> mChannelBuffers;
1.69 +};
1.70 +
1.71 +/**
1.72 + * This class is used to decode media buffers on a dedicated threadpool.
1.73 + *
1.74 + * This class manages the resources that it uses internally (such as the
1.75 + * thread-pool) and provides a clean external interface.
1.76 + */
1.77 +class MediaBufferDecoder
1.78 +{
1.79 +public:
1.80 + void AsyncDecodeMedia(const char* aContentType, uint8_t* aBuffer,
1.81 + uint32_t aLength, WebAudioDecodeJob& aDecodeJob);
1.82 +
1.83 + ~MediaBufferDecoder() { Shutdown(); }
1.84 + void Shutdown();
1.85 +
1.86 + size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.87 + {
1.88 + return 0;
1.89 + }
1.90 +
1.91 +private:
1.92 + bool EnsureThreadPoolInitialized();
1.93 +
1.94 +private:
1.95 + nsCOMPtr<nsIThreadPool> mThreadPool;
1.96 +};
1.97 +
1.98 +}
1.99 +
1.100 +#endif
1.101 +
