dom/media/platforms/wmf/WMFMediaDataDecoder.h
author Nathan Froyd <froydnj@mozilla.com>
Wed, 07 Oct 2015 16:50:25 -0400
changeset 266617 91d4539e00cecb658604e021675a923c60ef3235
parent 266613 1f51d1614b9a58e41dd3a1bf2dc6aad34dbb2170
child 266639 41dea9df27ed995f8315ab4318c187a617937664
permissions -rw-r--r--
Bug 1207245 - part 6 - rename nsRefPtr<T> to RefPtr<T>; r=ehsan; a=Tomcat The bulk of this commit was generated with a script, executed at the top level of a typical source code checkout. The only non-machine-generated part was modifying MFBT's moz.build to reflect the new naming. # The main substitution. find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \ xargs perl -p -i -e ' s/nsRefPtr\.h/RefPtr\.h/g; # handle includes s/nsRefPtr ?</RefPtr</g; # handle declarations and variables ' # Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h. perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h # Handle nsRefPtr.h itself, a couple places that define constructors # from nsRefPtr, and code generators specially. We do this here, rather # than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename # things like nsRefPtrHashtable. perl -p -i -e 's/nsRefPtr/RefPtr/g' \ mfbt/nsRefPtr.h \ xpcom/glue/nsCOMPtr.h \ xpcom/base/OwningNonNull.h \ ipc/ipdl/ipdl/lower.py \ ipc/ipdl/ipdl/builtin.py \ dom/bindings/Codegen.py \ python/lldbutils/lldbutils/utils.py # In our indiscriminate substitution above, we renamed # nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up. find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \ xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g' if [ -d .git ]; then git mv mfbt/nsRefPtr.h mfbt/RefPtr.h else hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h fi

/* -*- 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 "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
  // MP4Reader.
  virtual HRESULT Output(int64_t aStreamOffset,
                         RefPtr<MediaData>& aOutput) = 0;

  void Flush() { mDecoder->Flush(); }

  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;

protected:
  // IMFTransform wrapper that performs the decoding.
  RefPtr<MFTDecoder> mDecoder;
};

// 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,
                      FlushableTaskQueue* aAudioTaskQueue,
                      MediaDataDecoderCallback* aCallback);
  ~WMFMediaDataDecoder();

  RefPtr<MediaDataDecoder::InitPromise> Init() override;

  nsresult Input(MediaRawData* aSample);

  nsresult Flush() override;

  nsresult Drain() override;

  nsresult Shutdown() override;

  bool IsHardwareAccelerated(nsACString& aFailureReason) const 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();

  RefPtr<FlushableTaskQueue> 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;

  // For access to and waiting on mIsFlushing
  Monitor mMonitor;
  // 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.
  bool mIsFlushing;

  bool mIsShutDown;

  // For telemetry
  bool mHasSuccessfulOutput = false;
  bool mRecordedError = false;
};

} // namespace mozilla

#endif // WMFMediaDataDecoder_h_