blob: 445789073e973f5ef8682af74fc185b958d037a6 [file] [log] [blame]
// Copyright (c) 2010 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.
#include <string>
#include "base/gtest_prod_util.h"
#include "base/lock.h"
#include "media/base/filters.h"
namespace media {
// Basic data source that treats the URL as a file path, and uses the file
// system to read data for a media pipeline.
class FileDataSource : public DataSource {
// Public method to get a filter factory for the FileDataSource.
static FilterFactory* CreateFactory() {
return new FilterFactoryImpl0<FileDataSource>();
// Implementation of MediaFilter.
virtual void Stop(FilterCallback* callback);
// Implementation of DataSource.
virtual void Initialize(const std::string& url, FilterCallback* callback);
virtual const MediaFormat& media_format();
virtual void Read(int64 position, size_t size, uint8* data,
ReadCallback* read_callback);
virtual bool GetSize(int64* size_out);
virtual bool IsStreaming();
// Only allow factories and tests to create this object.
// TODO(scherkus): I'm getting tired of these factories getting in the way
// of my tests!!!
FRIEND_TEST_ALL_PREFIXES(FileDataSourceTest, OpenFile);
FRIEND_TEST_ALL_PREFIXES(FileDataSourceTest, ReadData);
friend class FilterFactoryImpl0<FileDataSource>;
virtual ~FileDataSource();
// File handle. NULL if not initialized or an error occurs.
FILE* file_;
// Size of the file in bytes.
int64 file_size_;
// Media format handed out by the DataSource::GetMediaFormat method.
MediaFormat media_format_;
// Critical section that protects all of the DataSource methods to prevent
// a Stop from happening while in the middle of a file I/O operation.
// TODO(ralphl): Ideally this would use asynchronous I/O or we will know
// that we will block for a short period of time in reads. Otherwise, we can
// hang the pipeline Stop.
Lock lock_;
} // namespace media