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// Copyright 2017 The Chromium Authors. All rights reserved.
// 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/callback.h"
#include "base/macros.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 {
public:
CdmAuxiliaryHelper();
~CdmAuxiliaryHelper() override;
// Callback to report the size of file read by cdm::FileIO created by |this|.
using FileReadCB = base::RepeatingCallback<void(int)>;
virtual void SetFileReadCB(FileReadCB file_read_cb);
// Given |client|, creates a cdm::FileIO object and returns it.
// The caller does not own the returned object and should not delete it
// directly. Instead, it should call cdm::FileIO::Close() after it's not
// needed anymore.
virtual cdm::FileIO* CreateCdmFileIO(cdm::FileIOClient* client);
// Gets the origin of the frame associated with the CDM, which could be empty
// if the origin is unavailable or if error happened.
virtual url::Origin GetCdmOrigin();
// CdmAllocator implementation.
cdm::Buffer* CreateCdmBuffer(size_t capacity) override;
std::unique_ptr<VideoFrameImpl> CreateCdmVideoFrame() override;
// OutputProtection implementation.
void QueryStatus(QueryStatusCB callback) override;
void EnableProtection(uint32_t desired_protection_mask,
EnableProtectionCB callback) override;
// CdmDocumentService implementation.
void ChallengePlatform(const std::string& service_id,
const std::string& challenge,
ChallengePlatformCB callback) override;
void GetStorageId(uint32_t version, StorageIdCB callback) override;
#if defined(OS_WIN)
void GetCdmPreferenceData(GetCdmPreferenceDataCB callback) override;
void SetCdmClientToken(const std::vector<uint8_t>& client_token) override;
#endif // defined(OS_WIN)
private:
DISALLOW_COPY_AND_ASSIGN(CdmAuxiliaryHelper);
};
} // namespace media
#endif // MEDIA_CDM_CDM_AUXILIARY_HELPER_H_
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