1 // Copyright (c) 2012 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 MEDIA_FILTERS_FILE_DATA_SOURCE_H_ 6 #define MEDIA_FILTERS_FILE_DATA_SOURCE_H_ 7 8 #include <string> 9 10 #include "base/files/file_path.h" 11 #include "base/files/memory_mapped_file.h" 12 #include "base/platform_file.h" 13 #include "media/base/data_source.h" 14 15 namespace media { 16 17 // Basic data source that treats the URL as a file path, and uses the file 18 // system to read data for a media pipeline. 19 class MEDIA_EXPORT FileDataSource : public DataSource { 20 public: 21 FileDataSource(); 22 virtual ~FileDataSource(); 23 24 bool Initialize(const base::FilePath& file_path); 25 bool InitializeFromPlatformFile(const base::PlatformFile& file); 26 27 // Implementation of DataSource. 28 virtual void set_host(DataSourceHost* host) OVERRIDE; 29 virtual void Stop(const base::Closure& callback) OVERRIDE; 30 virtual void Read(int64 position, int size, uint8* data, 31 const DataSource::ReadCB& read_cb) OVERRIDE; 32 virtual bool GetSize(int64* size_out) OVERRIDE; 33 virtual bool IsStreaming() OVERRIDE; 34 virtual void SetBitrate(int bitrate) OVERRIDE; 35 36 // Unit test helpers. Recreate the object if you want the default behaviour. 37 void force_read_errors_for_testing() { force_read_errors_ = true; } 38 void force_streaming_for_testing() { force_streaming_ = true; } 39 40 private: 41 // Informs the host of changes in total and buffered bytes. 42 void UpdateHostBytes(); 43 44 base::MemoryMappedFile file_; 45 46 bool force_read_errors_; 47 bool force_streaming_; 48 49 DISALLOW_COPY_AND_ASSIGN(FileDataSource); 50 }; 51 52 } // namespace media 53 54 #endif // MEDIA_FILTERS_FILE_DATA_SOURCE_H_ 55
