/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#ifndef ChromiumAdapter_h_
#define ChromiumAdapter_h_

#include "GMPLoader.h"
#include "prlink.h"
#include "GMPUtils.h"
#include "nsTArray.h"
#include "content_decryption_module_ext.h"
#include "nsString.h"
#include "mozilla/Pair.h"

struct GMPPlatformAPI;

namespace mozilla {

#if defined(XP_WIN)
typedef nsString HostFileString;
#else
typedef nsCString HostFileString;
#endif

class HostFile
{
public:
  explicit HostFile(const nsCString& aPath);
  HostFile(HostFile&& aOther);
  ~HostFile();

  const HostFileString& Path() const { return mPath; }
  cdm::PlatformFile TakePlatformFile();

private:
  const HostFileString mPath;
  cdm::PlatformFile mFile = cdm::kInvalidPlatformFile;
};

struct HostFileData
{
  HostFileData(HostFile&& aBinary, HostFile&& aSig)
    : mBinary(Move(aBinary))
    , mSig(Move(aSig))
  {
  }

  HostFileData(HostFileData&& aOther)
    : mBinary(Move(aOther.mBinary))
    , mSig(Move(aOther.mSig))
  {
  }

  ~HostFileData() {}

  HostFile mBinary;
  HostFile mSig;
};

class ChromiumCDMAdapter : public gmp::GMPAdapter
{
public:
  explicit ChromiumCDMAdapter(nsTArray<Pair<nsCString, nsCString>>&& aHostPathPairs);

  void SetAdaptee(PRLibrary* aLib) override;

  // These are called in place of the corresponding GMP API functions.
  GMPErr GMPInit(const GMPPlatformAPI* aPlatformAPI) override;
  GMPErr GMPGetAPI(const char* aAPIName,
                   void* aHostAPI,
                   void** aPluginAPI,
                   uint32_t aDecryptorId) override;
  void GMPShutdown() override;

  static bool Supports(int32_t aModuleVersion,
                       int32_t aInterfaceVersion,
                       int32_t aHostVersion);

private:
  void PopulateHostFiles(nsTArray<Pair<nsCString, nsCString>>&& aHostFilePaths);

  PRLibrary* mLib = nullptr;
  nsTArray<HostFileData> mHostFiles;
};

} // namespace mozilla

#endif // ChromiumAdapter_h_