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media / muxers / output_position_tracker.h [blame]
// Copyright 2023 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_MUXERS_OUTPUT_POSITION_TRACKER_H_
#define MEDIA_MUXERS_OUTPUT_POSITION_TRACKER_H_
#include <string_view>
#include "base/sequence_checker.h"
#include "media/base/media_export.h"
#include "media/muxers/muxer.h"
namespace media {
// The purpose of this class is to provide the current offset
// information of the target buffer, as the target buffer lacks
// offset data in its callback. This offset information is necessary
// for the MOOF and TFHD boxes.
class MEDIA_EXPORT OutputPositionTracker {
public:
explicit OutputPositionTracker(Muxer::WriteDataCB write_data_callback);
~OutputPositionTracker();
OutputPositionTracker(const OutputPositionTracker&) = delete;
OutputPositionTracker& operator=(const OutputPositionTracker&) = delete;
void WriteSpan(base::span<const uint8_t> data);
uint32_t GetCurrentPos() const;
private:
uint32_t current_pos_ = 0;
SEQUENCE_CHECKER(sequence_checker_);
const Muxer::WriteDataCB write_data_callback_
GUARDED_BY_CONTEXT(sequence_checker_);
}; // class OutputPositionTracker.
} // namespace media
#endif // MEDIA_MUXERS_OUTPUT_POSITION_TRACKER_H_