47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef MPD_BASE_BANDWIDTH_ESTIMATOR_H_
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#define MPD_BASE_BANDWIDTH_ESTIMATOR_H_
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#include <stdint.h>
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namespace shaka {
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class BandwidthEstimator {
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public:
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explicit BandwidthEstimator(double target_segment_duration);
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~BandwidthEstimator();
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/// @param size is the size of the block in bytes. Should be positive.
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/// @param duration is the length in seconds. Should be positive.
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void AddBlock(uint64_t size_in_bytes, double duration);
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/// @return The estimate bandwidth, in bits per second, calculated from the
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/// sum of the sizes of every block, divided by the sum of durations
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/// of every block, of the number of blocks specified in the
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/// constructor. The value is rounded up to the nearest integer.
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uint64_t Estimate() const;
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/// @return The max bandwidth, in bits per second, of the number of blocks
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/// specified in the constructor. The value is rounded up to the
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/// nearest integer.
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uint64_t Max() const;
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private:
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BandwidthEstimator(const BandwidthEstimator&) = delete;
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BandwidthEstimator& operator=(const BandwidthEstimator&) = delete;
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const double target_segment_duration_ = 0;
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uint64_t total_size_in_bits_ = 0;
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double total_duration_ = 0;
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uint64_t max_bitrate_ = 0;
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};
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} // namespace shaka
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#endif // MPD_BASE_BANDWIDTH_ESTIMATOR_H_
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