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https://github.com/roytam1/palemoon27.git
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trav90
112 lines
3.6 KiB
C++
112 lines
3.6 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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#if !defined(WMFMediaDataDecoder_h_)
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#define WMFMediaDataDecoder_h_
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#include "WMF.h"
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#include "MP4Reader.h"
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#include "MFTDecoder.h"
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#include "mozilla/RefPtr.h"
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namespace mozilla {
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// Encapsulates the initialization of the MFTDecoder appropriate for decoding
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// a given stream, and the process of converting the IMFSample produced
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// by the MFT into a MediaData object.
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class MFTManager {
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public:
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virtual ~MFTManager() {}
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// Creates an initializs the MFTDecoder.
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// Returns nullptr on failure.
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virtual TemporaryRef<MFTDecoder> Init() = 0;
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// Submit a compressed sample for decoding.
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// This should forward to the MFTDecoder after performing
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// any required sample formatting.
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virtual HRESULT Input(MediaRawData* aSample) = 0;
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// Produces decoded output, if possible. Blocks until output can be produced,
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// or until no more is able to be produced.
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// Returns S_OK on success, or MF_E_TRANSFORM_NEED_MORE_INPUT if there's not
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// enough data to produce more output. If this returns a failure code other
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// than MF_E_TRANSFORM_NEED_MORE_INPUT, an error will be reported to the
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// MP4Reader.
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virtual HRESULT Output(int64_t aStreamOffset,
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nsRefPtr<MediaData>& aOutput) = 0;
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// Destroys all resources.
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virtual void Shutdown() = 0;
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virtual bool IsHardwareAccelerated() const { return false; }
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};
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// Decodes audio and video using Windows Media Foundation. Samples are decoded
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// using the MFTDecoder created by the MFTManager. This class implements
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// the higher-level logic that drives mapping the MFT to the async
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// MediaDataDecoder interface. The specifics of decoding the exact stream
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// type are handled by MFTManager and the MFTDecoder it creates.
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class WMFMediaDataDecoder : public MediaDataDecoder {
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public:
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WMFMediaDataDecoder(MFTManager* aOutputSource,
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FlushableMediaTaskQueue* aAudioTaskQueue,
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MediaDataDecoderCallback* aCallback);
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~WMFMediaDataDecoder();
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virtual nsresult Init() override;
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virtual nsresult Input(MediaRawData* aSample);
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virtual nsresult Flush() override;
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virtual nsresult Drain() override;
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virtual nsresult Shutdown() override;
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virtual bool IsWaitingMediaResources() { return false; };
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virtual bool IsHardwareAccelerated() const override;
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private:
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// Called on the task queue. Inserts the sample into the decoder, and
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// extracts output if available.
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void Decode();
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void EnsureDecodeTaskDispatched();
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void PurgeInputQueue();
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// Called on the task queue. Extracts output if available, and delivers
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// it to the reader. Called after ProcessDecode() and ProcessDrain().
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void ProcessOutput();
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// Called on the task queue. Orders the MFT to drain, and then extracts
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// all available output.
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void ProcessDrain();
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void ProcessShutdown();
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RefPtr<FlushableMediaTaskQueue> mTaskQueue;
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MediaDataDecoderCallback* mCallback;
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RefPtr<MFTDecoder> mDecoder;
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nsAutoPtr<MFTManager> mMFTManager;
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// The last offset into the media resource that was passed into Input().
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// This is used to approximate the decoder's position in the media resource.
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int64_t mLastStreamOffset;
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Monitor mMonitor;
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std::queue<nsRefPtr<MediaRawData>> mInput;
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bool mIsDecodeTaskDispatched;
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bool mIsFlushing;
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};
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} // namespace mozilla
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#endif // WMFMediaDataDecoder_h_
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