1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_ 6#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_ 7 8#include "base/bind.h" 9#include "base/files/file.h" 10#include "base/memory/ref_counted.h" 11#include "base/memory/weak_ptr.h" 12#include "storage/browser/blob/file_stream_reader.h" 13#include "storage/browser/fileapi/file_system_url.h" 14#include "storage/browser/storage_browser_export.h" 15 16namespace base { 17class FilePath; 18} 19 20namespace storage { 21class FileSystemContext; 22} 23 24class MTPFileStreamReader 25 : public NON_EXPORTED_BASE(storage::FileStreamReader) { 26 public: 27 MTPFileStreamReader(storage::FileSystemContext* file_system_context, 28 const storage::FileSystemURL& url, 29 int64 initial_offset, 30 const base::Time& expected_modification_time, 31 bool do_media_header_validation); 32 33 virtual ~MTPFileStreamReader(); 34 35 // FileStreamReader overrides. 36 virtual int Read(net::IOBuffer* buf, int buf_len, 37 const net::CompletionCallback& callback) OVERRIDE; 38 virtual int64 GetLength( 39 const net::Int64CompletionCallback& callback) OVERRIDE; 40 41 private: 42 void FinishValidateMediaHeader( 43 net::IOBuffer* header_buf, 44 net::IOBuffer* buf, int buf_len, 45 const net::CompletionCallback& callback, 46 const base::File::Info& file_info, 47 int header_bytes_read); 48 49 void FinishRead(const net::CompletionCallback& callback, 50 const base::File::Info& file_info, int bytes_read); 51 52 void FinishGetLength(const net::Int64CompletionCallback& callback, 53 const base::File::Info& file_info); 54 55 scoped_refptr<storage::FileSystemContext> file_system_context_; 56 storage::FileSystemURL url_; 57 int64 current_offset_; 58 const base::Time expected_modification_time_; 59 60 bool media_header_validated_; 61 62 base::WeakPtrFactory<MTPFileStreamReader> weak_factory_; 63 64 DISALLOW_COPY_AND_ASSIGN(MTPFileStreamReader); 65}; 66 67#endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_ 68