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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if !defined(WMFMediaDataDecoder_h_)
#define WMFMediaDataDecoder_h_
#include "WMF.h"
#include "MFTDecoder.h"
#include "mozilla/RefPtr.h"
#include "nsAutoPtr.h"
#include "PlatformDecoderModule.h"
namespace mozilla {
// Encapsulates the initialization of the MFTDecoder appropriate for decoding
// a given stream, and the process of converting the IMFSample produced
// by the MFT into a MediaData object.
class MFTManager {
public:
virtual ~MFTManager() {}
// Submit a compressed sample for decoding.
// This should forward to the MFTDecoder after performing
// any required sample formatting.
virtual HRESULT Input(MediaRawData* aSample) = 0;
// Produces decoded output, if possible. Blocks until output can be produced,
// or until no more is able to be produced.
// Returns S_OK on success, or MF_E_TRANSFORM_NEED_MORE_INPUT if there's not
// enough data to produce more output. If this returns a failure code other
// than MF_E_TRANSFORM_NEED_MORE_INPUT, an error will be reported to the
// MP4Demuxer.
virtual HRESULT Output(int64_t aStreamOffset,
RefPtr<MediaData>& aOutput) = 0;
virtual void Flush()
{
mDecoder->Flush();
mSeekTargetThreshold.reset();
}
virtual void Drain()
{
if (FAILED(mDecoder->SendMFTMessage(MFT_MESSAGE_COMMAND_DRAIN, 0))) {
NS_WARNING("Failed to send DRAIN command to MFT");
}
}
// Destroys all resources.
virtual void Shutdown() = 0;
virtual bool IsHardwareAccelerated(nsACString& aFailureReason) const { return false; }
virtual TrackInfo::TrackType GetType() = 0;
virtual const char* GetDescriptionName() const = 0;
virtual void SetSeekThreshold(const media::TimeUnit& aTime) {
mSeekTargetThreshold = Some(aTime);
}
protected:
// IMFTransform wrapper that performs the decoding.
RefPtr<MFTDecoder> mDecoder;
Maybe<media::TimeUnit> mSeekTargetThreshold;
};
// Decodes audio and video using Windows Media Foundation. Samples are decoded
// using the MFTDecoder created by the MFTManager. This class implements
// the higher-level logic that drives mapping the MFT to the async
// MediaDataDecoder interface. The specifics of decoding the exact stream
// type are handled by MFTManager and the MFTDecoder it creates.
class WMFMediaDataDecoder : public MediaDataDecoder {
public:
WMFMediaDataDecoder(MFTManager* aOutputSource,
TaskQueue* aTaskQueue,
MediaDataDecoderCallback* aCallback);
~WMFMediaDataDecoder();
RefPtr<MediaDataDecoder::InitPromise> Init() override;
void Input(MediaRawData* aSample);
void Flush() override;
void Drain() override;
void Shutdown() override;
bool IsHardwareAccelerated(nsACString& aFailureReason) const override;
const char* GetDescriptionName() const override
{
return mMFTManager ? mMFTManager->GetDescriptionName() : "";
}
virtual void SetSeekThreshold(const media::TimeUnit& aTime) override;
private:
// Called on the task queue. Inserts the sample into the decoder, and
// extracts output if available.
void ProcessDecode(MediaRawData* aSample);
// Called on the task queue. Extracts output if available, and delivers
// it to the reader. Called after ProcessDecode() and ProcessDrain().
void ProcessOutput();
// Called on the task queue. Orders the MFT to flush. There is no output to
// extract.
void ProcessFlush();
// Called on the task queue. Orders the MFT to drain, and then extracts
// all available output.
void ProcessDrain();
void ProcessShutdown();
const RefPtr<TaskQueue> mTaskQueue;
MediaDataDecoderCallback* mCallback;
nsAutoPtr<MFTManager> mMFTManager;
// The last offset into the media resource that was passed into Input().
// This is used to approximate the decoder's position in the media resource.
int64_t mLastStreamOffset;
// Set on reader/decode thread calling Flush() to indicate that output is
// not required and so input samples on mTaskQueue need not be processed.
// Cleared on mTaskQueue.
Atomic<bool> mIsFlushing;
bool mIsShutDown;
};
} // namespace mozilla
#endif // WMFMediaDataDecoder_h_
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