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- // Copyright 2016 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_MEMORY_DATA_SOURCE_H_
- #define MEDIA_FILTERS_MEMORY_DATA_SOURCE_H_
- #include <stddef.h>
- #include <stdint.h>
- #include <atomic>
- #include <string>
- #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;
- private:
- const std::string data_string_;
- const uint8_t* 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_
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