mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-16 23:30:48 +01:00
a4d873786f
This CL was generated by running git ls-files | grep -P "(\.h|\.cc)$" | grep -v 'sdk/' | grep -v 'rtc_base/ssl_' | \ grep -v 'fake_rtc_certificate_generator.h' | grep -v 'modules/audio_device/win/' | \ grep -v 'system_wrappers/source/clock.cc' | grep -v 'rtc_base/trace_event.h' | \ grep -v 'modules/audio_coding/codecs/ilbc/' | grep -v 'screen_capturer_mac.h' | \ grep -v 'spl_inl_mips.h' | grep -v 'data_size_unittest.cc' | grep -v 'timestamp_unittest.cc' \ | xargs clang-format -i ; git cl format Most of these changes are clang-format grouping and reordering includes differently. Bug: webrtc:9340 Change-Id: Ic83ddbc169bfacd21883e381b5181c3dd4fe8a63 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144051 Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28505}
81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef SYSTEM_WRAPPERS_INCLUDE_RTP_TO_NTP_ESTIMATOR_H_
|
|
#define SYSTEM_WRAPPERS_INCLUDE_RTP_TO_NTP_ESTIMATOR_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <list>
|
|
|
|
#include "absl/types/optional.h"
|
|
#include "modules/include/module_common_types_public.h"
|
|
#include "rtc_base/checks.h"
|
|
#include "rtc_base/numerics/moving_median_filter.h"
|
|
#include "system_wrappers/include/ntp_time.h"
|
|
|
|
namespace webrtc {
|
|
// Class for converting an RTP timestamp to the NTP domain in milliseconds.
|
|
// The class needs to be trained with (at least 2) RTP/NTP timestamp pairs from
|
|
// RTCP sender reports before the convertion can be done.
|
|
class RtpToNtpEstimator {
|
|
public:
|
|
RtpToNtpEstimator();
|
|
~RtpToNtpEstimator();
|
|
|
|
// RTP and NTP timestamp pair from a RTCP SR report.
|
|
struct RtcpMeasurement {
|
|
RtcpMeasurement(uint32_t ntp_secs,
|
|
uint32_t ntp_frac,
|
|
int64_t unwrapped_timestamp);
|
|
bool IsEqual(const RtcpMeasurement& other) const;
|
|
|
|
NtpTime ntp_time;
|
|
int64_t unwrapped_rtp_timestamp;
|
|
};
|
|
|
|
// Estimated parameters from RTP and NTP timestamp pairs in |measurements_|.
|
|
struct Parameters {
|
|
Parameters() : frequency_khz(0.0), offset_ms(0.0) {}
|
|
|
|
Parameters(double frequency_khz, double offset_ms)
|
|
: frequency_khz(frequency_khz), offset_ms(offset_ms) {}
|
|
|
|
double frequency_khz;
|
|
double offset_ms;
|
|
};
|
|
|
|
// Updates measurements with RTP/NTP timestamp pair from a RTCP sender report.
|
|
// |new_rtcp_sr| is set to true if a new report is added.
|
|
bool UpdateMeasurements(uint32_t ntp_secs,
|
|
uint32_t ntp_frac,
|
|
uint32_t rtp_timestamp,
|
|
bool* new_rtcp_sr);
|
|
|
|
// Converts an RTP timestamp to the NTP domain in milliseconds.
|
|
// Returns true on success, false otherwise.
|
|
bool Estimate(int64_t rtp_timestamp, int64_t* ntp_timestamp_ms) const;
|
|
|
|
// Returns estimated rtp to ntp linear transform parameters.
|
|
const absl::optional<Parameters> params() const;
|
|
|
|
static const int kMaxInvalidSamples = 3;
|
|
|
|
private:
|
|
void UpdateParameters();
|
|
|
|
int consecutive_invalid_samples_;
|
|
std::list<RtcpMeasurement> measurements_;
|
|
absl::optional<Parameters> params_;
|
|
mutable TimestampUnwrapper unwrapper_;
|
|
};
|
|
} // namespace webrtc
|
|
|
|
#endif // SYSTEM_WRAPPERS_INCLUDE_RTP_TO_NTP_ESTIMATOR_H_
|