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media / filters / memory_data_source.h [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_FILTERS_MEMORY_DATA_SOURCE_H_
#define MEDIA_FILTERS_MEMORY_DATA_SOURCE_H_
#include <stddef.h>
#include <stdint.h>
#include <atomic>
#include <string>
#include "base/memory/raw_ptr.h"
#include "media/base/data_source.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 MemoryDataSource final : public DataSource {
public:
// Construct MemoryDataSource with |data| and |size|. The data is guaranteed
// to be valid during the lifetime of MemoryDataSource.
MemoryDataSource(const uint8_t* data, size_t size);
// Similar to the above, but takes ownership of the std::string.
explicit MemoryDataSource(std::string data);
MemoryDataSource(const MemoryDataSource&) = delete;
MemoryDataSource& operator=(const MemoryDataSource&) = delete;
~MemoryDataSource() final;
// Implementation of DataSource.
void Read(int64_t position,
int size,
uint8_t* data,
DataSource::ReadCB read_cb) final;
void Stop() final;
void Abort() final;
[[nodiscard]] bool GetSize(int64_t* size_out) final;
bool IsStreaming() final;
void SetBitrate(int bitrate) final;
bool PassedTimingAllowOriginCheck() final;
bool WouldTaintOrigin() final;
private:
const std::string data_string_;
raw_ptr<const uint8_t, AllowPtrArithmetic> data_ = nullptr;
const size_t size_ = 0;
// Stop may be called from the render thread while this class is being used by
// the media thread. It's harmless if we fulfill a read after Stop() has been
// called, so an atomic without a lock is safe.
std::atomic<bool> is_stopped_{false};
};
} // namespace media
#endif // MEDIA_FILTERS_MEMORY_DATA_SOURCE_H_