blob: c170500e38f7316ba3988841a6504821e404d353 [file] [log] [blame]
// 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_FILE_ADAPTER_H_
#define MEDIA_CDM_CDM_FILE_ADAPTER_H_
#include <stdint.h>
#include <string>
#include <vector>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "media/base/media_export.h"
#include "media/cdm/api/content_decryption_module.h"
#include "media/cdm/cdm_file_io.h"
namespace media {
// This class provides the ability to read and write a file using cdm::FileIO.
class MEDIA_EXPORT CdmFileAdapter : public cdm::FileIOClient {
public:
enum class Status { kSuccess, kInUse, kError };
using FileOpenedCB = base::OnceCallback<void(Status status)>;
using ReadCB =
base::OnceCallback<void(bool success, const std::vector<uint8_t>& data)>;
using WriteCB = base::OnceCallback<void(bool success)>;
explicit CdmFileAdapter(cdm::ContentDecryptionModule_9::Host* host);
~CdmFileAdapter() override;
// Open the file with |name|. |open_cb| will be called when the file is
// available.
void Open(const std::string& name, FileOpenedCB open_cb);
// Read the contents of the file, calling |read_cb| with the contents when
// done. If the file does not exist Read() will succeed but |data| will
// be empty.
void Read(ReadCB read_cb);
// Write |data| into the file, replacing any existing contents. Due to the
// way Read() works, files will be considered deleted if the file is empty,
// so write 0 bytes to "delete" the file.
void Write(const std::vector<uint8_t>& data, WriteCB write_cb);
private:
// cdm::FileIOClient implementation.
// These are private as they should be called by the cdm::FileIO
// implementation only.
void OnOpenComplete(cdm::FileIOClient::Status status) override;
void OnReadComplete(cdm::FileIOClient::Status status,
const uint8_t* data,
uint32_t data_size) override;
void OnWriteComplete(cdm::FileIOClient::Status status) override;
FileOpenedCB open_cb_;
ReadCB read_cb_;
WriteCB write_cb_;
cdm::FileIO* file_io_;
DISALLOW_COPY_AND_ASSIGN(CdmFileAdapter);
};
} // namespace media
#endif // MEDIA_CDM_CDM_FILE_ADAPTER_H_