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// Copyright 2014 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 CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_
#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_
#include "base/bind.h"
#include "base/files/file.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "webkit/browser/blob/file_stream_reader.h"
#include "webkit/browser/fileapi/file_system_url.h"
#include "webkit/browser/webkit_storage_browser_export.h"
namespace base {
class FilePath;
}
namespace fileapi {
class FileSystemContext;
}
class MTPFileStreamReader
: public NON_EXPORTED_BASE(webkit_blob::FileStreamReader) {
public:
MTPFileStreamReader(fileapi::FileSystemContext* file_system_context,
const fileapi::FileSystemURL& url,
int64 initial_offset,
const base::Time& expected_modification_time);
virtual ~MTPFileStreamReader();
// FileStreamReader overrides.
virtual int Read(net::IOBuffer* buf, int buf_len,
const net::CompletionCallback& callback) OVERRIDE;
virtual int64 GetLength(
const net::Int64CompletionCallback& callback) OVERRIDE;
private:
void FinishValidateMediaHeader(
net::IOBuffer* header_buf,
net::IOBuffer* buf, int buf_len,
const net::CompletionCallback& callback,
const base::File::Info& file_info,
int header_bytes_read);
void FinishRead(const net::CompletionCallback& callback,
const base::File::Info& file_info, int bytes_read);
void FinishGetLength(const net::Int64CompletionCallback& callback,
const base::File::Info& file_info);
scoped_refptr<fileapi::FileSystemContext> file_system_context_;
fileapi::FileSystemURL url_;
int64 current_offset_;
const base::Time expected_modification_time_;
bool media_header_validated_;
base::WeakPtrFactory<MTPFileStreamReader> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(MTPFileStreamReader);
};
#endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_
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