blob: fb905d28ab5681c9bca268764dd54fc1fd809fa1 [file] [log] [blame]
// Copyright (c) 2011 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 MEDIA_FILTERS_FILE_DATA_SOURCE_H_
#define MEDIA_FILTERS_FILE_DATA_SOURCE_H_
#include <string>
#include "base/gtest_prod_util.h"
#include "base/synchronization/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 MEDIA_EXPORT FileDataSource : public DataSource {
public:
FileDataSource();
FileDataSource(bool disable_file_size);
virtual ~FileDataSource();
PipelineStatus Initialize(const std::string& url);
// Implementation of Filter.
virtual void set_host(FilterHost* filter_host);
virtual void Stop(const base::Closure& callback);
// Implementation of DataSource.
virtual void Read(int64 position, size_t size, uint8* data,
const DataSource::ReadCallback& read_callback);
virtual bool GetSize(int64* size_out);
virtual bool IsStreaming();
virtual void SetPreload(Preload preload);
virtual void SetBitrate(int bitrate);
private:
// 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_TEST_ALL_PREFIXES(FileDataSourceTest, Seek);
// Informs the host of changes in total and buffered bytes.
void UpdateHostBytes();
// File handle. NULL if not initialized or an error occurs.
FILE* file_;
// Size of the file in bytes.
int64 file_size_;
// True if the FileDataSource should ignore its set file size, false
// otherwise.
bool disable_file_size_;
// 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.
base::Lock lock_;
DISALLOW_COPY_AND_ASSIGN(FileDataSource);
};
} // namespace media
#endif // MEDIA_FILTERS_FILE_DATA_SOURCE_H_