blob: 8cd198dbdad12bb11795082e7ad9f9708adf8c8b [file] [log] [blame]
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include <stdint.h>
#include <string.h>
#include <list>
#include <memory>
#include "modules/audio_coding/neteq/tick_timer.h"
#include "rtc_base/constructor_magic.h"
namespace webrtc {
class DelayPeakDetector {
DelayPeakDetector(const TickTimer* tick_timer, bool ignore_reordered_packets);
virtual ~DelayPeakDetector();
virtual void Reset();
// Notifies the DelayPeakDetector of how much audio data is carried in each
// packet.
virtual void SetPacketAudioLength(int length_ms);
// Returns true if peak-mode is active. That is, delay peaks were observed
// recently.
virtual bool peak_found();
// Calculates and returns the maximum delay peak height. Returns -1 if no
// delay peaks have been observed recently. The unit is number of packets.
virtual int MaxPeakHeight() const;
// Calculates and returns the maximum delay peak distance in ms (strictly
// larger than 0), or 0 if no delay peaks have been observed recently.
virtual uint64_t MaxPeakPeriod() const;
// Updates the DelayPeakDetector with a new inter-arrival time (in packets),
// the current target buffer level (needed to decide if a peak is observed or
// not) and if the new inter-arrival time includes a compensation for
// reordering. Returns true if peak-mode is active, false if not.
virtual bool Update(int inter_arrival_time, bool reordered, int target_level);
static const size_t kMaxNumPeaks = 8;
static const size_t kMinPeaksToTrigger = 2;
static const int kPeakHeightMs = 78;
static const int kMaxPeakPeriodMs = 10000;
typedef struct {
uint64_t period_ms;
int peak_height_packets;
} Peak;
bool CheckPeakConditions();
std::list<Peak> peak_history_;
bool peak_found_;
int peak_detection_threshold_;
const TickTimer* tick_timer_;
std::unique_ptr<TickTimer::Stopwatch> peak_period_stopwatch_;
const bool ignore_reordered_packets_;
const bool frame_length_change_experiment_;
} // namespace webrtc