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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_
#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_
#include <stdint.h>
#include "base/files/file.h"
#include "base/functional/bind.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h"
#include "net/base/completion_once_callback.h"
#include "storage/browser/file_system/file_stream_reader.h"
#include "storage/browser/file_system/file_system_url.h"
namespace storage {
class FileSystemContext;
}
class MTPFileStreamReader : public storage::FileStreamReader {
public:
MTPFileStreamReader(storage::FileSystemContext* file_system_context,
const storage::FileSystemURL& url,
int64_t initial_offset,
const base::Time& expected_modification_time,
bool do_media_header_validation);
MTPFileStreamReader(const MTPFileStreamReader&) = delete;
MTPFileStreamReader& operator=(const MTPFileStreamReader&) = delete;
~MTPFileStreamReader() override;
// FileStreamReader overrides.
int Read(net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback) override;
int64_t GetLength(net::Int64CompletionOnceCallback callback) override;
private:
void FinishValidateMediaHeader(
net::IOBuffer* header_buf,
net::IOBuffer* buf, int buf_len,
const base::File::Info& file_info,
int header_bytes_read);
void FinishRead(const base::File::Info& file_info, int bytes_read);
void FinishGetLength(const base::File::Info& file_info);
void CallReadCallbackwithPlatformFileError(base::File::Error file_error);
void CallGetLengthCallbackWithPlatformFileError(base::File::Error file_error);
void ReadBytes(
const storage::FileSystemURL& url,
const scoped_refptr<net::IOBuffer>& buf,
int64_t offset,
int buf_len,
MTPDeviceAsyncDelegate::ReadBytesSuccessCallback success_callback);
scoped_refptr<storage::FileSystemContext> file_system_context_;
storage::FileSystemURL url_;
int64_t current_offset_;
const base::Time expected_modification_time_;
net::CompletionOnceCallback read_callback_;
net::Int64CompletionOnceCallback get_length_callback_;
bool media_header_validated_;
base::WeakPtrFactory<MTPFileStreamReader> weak_factory_{this};
};
#endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_
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