bb547203bf
In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_DELAY_PEAK_DETECTOR_H_
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#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_DELAY_PEAK_DETECTOR_H_
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#include <string.h> // size_t
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#include <list>
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#include <memory>
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#include "webrtc/modules/audio_coding/neteq/tick_timer.h"
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#include "webrtc/rtc_base/constructormagic.h"
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namespace webrtc {
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class DelayPeakDetector {
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public:
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DelayPeakDetector(const TickTimer* tick_timer);
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virtual ~DelayPeakDetector();
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virtual void Reset();
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// Notifies the DelayPeakDetector of how much audio data is carried in each
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// packet.
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virtual void SetPacketAudioLength(int length_ms);
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// Returns true if peak-mode is active. That is, delay peaks were observed
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// recently.
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virtual bool peak_found();
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// Calculates and returns the maximum delay peak height. Returns -1 if no
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// delay peaks have been observed recently. The unit is number of packets.
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virtual int MaxPeakHeight() const;
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// Calculates and returns the maximum delay peak distance in ms (strictly
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// larger than 0), or 0 if no delay peaks have been observed recently.
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virtual uint64_t MaxPeakPeriod() const;
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// Updates the DelayPeakDetector with a new inter-arrival time (in packets)
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// and the current target buffer level (needed to decide if a peak is observed
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// or not). Returns true if peak-mode is active, false if not.
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virtual bool Update(int inter_arrival_time, int target_level);
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private:
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static const size_t kMaxNumPeaks = 8;
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static const size_t kMinPeaksToTrigger = 2;
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static const int kPeakHeightMs = 78;
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static const int kMaxPeakPeriodMs = 10000;
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typedef struct {
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uint64_t period_ms;
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int peak_height_packets;
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} Peak;
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bool CheckPeakConditions();
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std::list<Peak> peak_history_;
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bool peak_found_;
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int peak_detection_threshold_;
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const TickTimer* tick_timer_;
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std::unique_ptr<TickTimer::Stopwatch> peak_period_stopwatch_;
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RTC_DISALLOW_COPY_AND_ASSIGN(DelayPeakDetector);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_DELAY_PEAK_DETECTOR_H_
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