chromium/media/cdm/cdm_auxiliary_helper.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_CDM_CDM_AUXILIARY_HELPER_H_
#define MEDIA_CDM_CDM_AUXILIARY_HELPER_H_

#include <stdint.h>

#include <memory>
#include <string>

#include "base/functional/callback.h"
#include "base/unguessable_token.h"
#include "build/build_config.h"
#include "media/base/media_export.h"
#include "media/cdm/cdm_allocator.h"
#include "media/cdm/cdm_document_service.h"
#include "media/cdm/output_protection.h"
#include "media/media_buildflags.h"
#include "url/origin.h"

namespace cdm {
class FileIO;
class FileIOClient;
}  // namespace cdm

namespace media {

// Provides a wrapper on the auxiliary functions (CdmAllocator, CdmFileIO,
// OutputProtection, CdmDocumentService) needed by the library CDM. The
// default implementation does nothing -- it simply returns nullptr, false, 0,
// etc. as required to meet the interface.
class MEDIA_EXPORT CdmAuxiliaryHelper : public CdmAllocator,
                                        public OutputProtection,
                                        public CdmDocumentService { … };

}  // namespace media

#endif  // MEDIA_CDM_CDM_AUXILIARY_HELPER_H_