Source code

Revision control

Other Tools

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=4 et :
* 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 GMP_LOADER_H__
#define GMP_LOADER_H__
#include <stdint.h>
#include "prlink.h"
#include "gmp-entrypoints.h"
#include "mozilla/UniquePtr.h"
#include "nsString.h"
#if defined(XP_MACOSX) && defined(MOZ_SANDBOX)
# include "mozilla/Sandbox.h"
#endif
namespace mozilla {
namespace gmp {
class SandboxStarter {
public:
virtual ~SandboxStarter() = default;
virtual bool Start(const char* aLibPath) = 0;
};
// Interface that adapts a plugin to the GMP API.
class GMPAdapter {
public:
virtual ~GMPAdapter() = default;
// Sets the adapted to plugin library module.
// Note: the GMPAdapter is responsible for calling PR_UnloadLibrary on aLib
// when it's finished with it.
virtual void SetAdaptee(PRLibrary* aLib) = 0;
// These are called in place of the corresponding GMP API functions.
virtual GMPErr GMPInit(const GMPPlatformAPI* aPlatformAPI) = 0;
// The `aKeySystem` arg is used to specify the key system when loading CDMs,
// and will be ignored by non-CDM GMPs. It is not part of the public GMP API
// Gecko exposes.
virtual GMPErr GMPGetAPI(const char* aAPIName, void* aHostAPI,
void** aPluginAPI, const nsCString& aKeySystem) = 0;
virtual void GMPShutdown() = 0;
};
// Encapsulates activating the sandbox, and loading the GMP.
// Load() takes an optional GMPAdapter which can be used to adapt non-GMPs
// to adhere to the GMP API.
class GMPLoader {
public:
GMPLoader();
// Activates the sandbox, then loads the GMP library. If aAdapter is
// non-null, the lib path is assumed to be a non-GMP, and the adapter
// is initialized with the lib and the adapter is used to interact with
// the plugin.
bool Load(const char* aUTF8LibPath, uint32_t aLibPathLen,
const GMPPlatformAPI* aPlatformAPI, GMPAdapter* aAdapter = nullptr);
// Retrieves an interface pointer from the GMP. If the GMP is loading a CDM,
// aKeySystem is passed to the CDM to allow for key system specific
// configuration by the CDM.
GMPErr GetAPI(const char* aAPIName, void* aHostAPI, void** aPluginAPI,
const nsCString& aKeySystem);
// Calls the GMPShutdown function exported by the GMP lib, and unloads the
// plugin library.
void Shutdown();
bool CanSandbox() const;
private:
UniquePtr<SandboxStarter> mSandboxStarter;
UniquePtr<GMPAdapter> mAdapter;
};
} // namespace gmp
} // namespace mozilla
#endif // GMP_LOADER_H__