OmxPlatformLayer.h

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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(OmxPlatformLayer_h_)

#  define OmxPlatformLayer_h_

#  include "OMX_Core.h"

#  include "OMX_Types.h"

#  include "OMX_Video.h"

#  include "nsStringFwd.h"

#  include "OmxPromiseLayer.h"

namespace mozilla {

class TaskQueue;

class TrackInfo;

/*

 * This class the the abstract layer of the platform OpenMax IL implementation.

 * For some platform like andoird, it exposures its OpenMax IL via IOMX which

 * is definitions are different comparing to standard.

 * For other platforms like Raspberry Pi, it will be easy to implement this

 * layer with the standard OpenMax IL api.

*/

class OmxPlatformLayer {

 public:

  typedef OmxPromiseLayer::BUFFERLIST BUFFERLIST;

  typedef OmxPromiseLayer::BufferData BufferData;

  virtual OMX_ERRORTYPE InitOmxToStateLoaded(const TrackInfo* aInfo) = 0;

  OMX_ERRORTYPE Config();

  virtual OMX_ERRORTYPE EmptyThisBuffer(BufferData* aData) = 0;

  virtual OMX_ERRORTYPE FillThisBuffer(BufferData* aData) = 0;

  virtual OMX_ERRORTYPE SendCommand(OMX_COMMANDTYPE aCmd, OMX_U32 aParam1,

                                    OMX_PTR aCmdData) = 0;

  // Buffer could be platform dependent. Therefore, derived class needs to

  // implement its owned buffer allocate/release API according to its platform

  // type.

  virtual nsresult AllocateOmxBuffer(OMX_DIRTYPE aType,

                                     BUFFERLIST* aBufferList) = 0;

  virtual nsresult ReleaseOmxBuffer(OMX_DIRTYPE aType,

                                    BUFFERLIST* aBufferList) = 0;

  virtual OMX_ERRORTYPE GetState(OMX_STATETYPE* aType) = 0;

  virtual OMX_ERRORTYPE GetParameter(OMX_INDEXTYPE aParamIndex,

                                     OMX_PTR aComponentParameterStructure,

                                     OMX_U32 aComponentParameterSize) = 0;

  virtual OMX_ERRORTYPE SetParameter(OMX_INDEXTYPE nIndex,

                                     OMX_PTR aComponentParameterStructure,

                                     OMX_U32 aComponentParameterSize) = 0;

  virtual nsresult Shutdown() = 0;

  virtual ~OmxPlatformLayer() = default;

  // For decoders, input port index is start port number and output port is

  // next. See OpenMAX IL spec v1.1.2 section 8.6.1 & 8.8.1.

  OMX_U32 InputPortIndex() { return mStartPortNumber; }

  OMX_U32 OutputPortIndex() { return mStartPortNumber + 1; }

  void GetPortIndices(nsTArray<uint32_t>& aPortIndex) {

    aPortIndex.AppendElement(InputPortIndex());

    aPortIndex.AppendElement(OutputPortIndex());

  virtual OMX_VIDEO_CODINGTYPE CompressionFormat();

  // Check if the platform implementation supports given MIME type.

  static bool SupportsMimeType(const nsACString& aMimeType);

  // Hide the details of creating implementation objects for different

  // platforms.

  static OmxPlatformLayer* Create(OmxDataDecoder* aDataDecoder,

                                  OmxPromiseLayer* aPromiseLayer,

                                  TaskQueue* aTaskQueue,

                                  layers::ImageContainer* aImageContainer);

 protected:

  OmxPlatformLayer() : mInfo(nullptr), mStartPortNumber(0) {}

  // The pointee is held by |OmxDataDecoder::mTrackInfo| and will outlive this

  // pointer.

  const TrackInfo* mInfo;

  OMX_U32 mStartPortNumber;

};

}  // namespace mozilla

#endif  // OmxPlatformLayer_h_