| // Copyright (c) 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/platform/peerconnection/rtc_rtp_source.h" |
| |
| #include <cmath> |
| |
| #include "base/notreached.h" |
| #include "base/time/time.h" |
| #include "third_party/webrtc/api/scoped_refptr.h" |
| #include "third_party/webrtc/system_wrappers/include/ntp_time.h" |
| |
| namespace blink { |
| |
| RTCRtpSource::RTCRtpSource(const webrtc::RtpSource& source) : source_(source) {} |
| |
| RTCRtpSource::~RTCRtpSource() {} |
| |
| RTCRtpSource::Type RTCRtpSource::SourceType() const { |
| switch (source_.source_type()) { |
| case webrtc::RtpSourceType::SSRC: |
| return RTCRtpSource::Type::kSSRC; |
| case webrtc::RtpSourceType::CSRC: |
| return RTCRtpSource::Type::kCSRC; |
| default: |
| NOTREACHED(); |
| return RTCRtpSource::Type::kSSRC; |
| } |
| } |
| |
| base::TimeTicks RTCRtpSource::Timestamp() const { |
| return base::TimeTicks() + |
| base::TimeDelta::FromMilliseconds(source_.timestamp_ms()); |
| } |
| |
| uint32_t RTCRtpSource::Source() const { |
| return source_.source_id(); |
| } |
| |
| base::Optional<double> RTCRtpSource::AudioLevel() const { |
| if (!source_.audio_level()) |
| return base::nullopt; |
| // Converted according to equation defined here: |
| // https://w3c.github.io/webrtc-pc/#dom-rtcrtpcontributingsource-audiolevel |
| uint8_t rfc_level = *source_.audio_level(); |
| if (rfc_level > 127u) |
| rfc_level = 127u; |
| if (rfc_level == 127u) |
| return 0.0; |
| return std::pow(10.0, -(double)rfc_level / 20.0); |
| } |
| |
| uint32_t RTCRtpSource::RtpTimestamp() const { |
| return source_.rtp_timestamp(); |
| } |
| |
| base::Optional<int64_t> RTCRtpSource::CaptureTimestamp() const { |
| if (!source_.absolute_capture_time()) |
| return base::nullopt; |
| return webrtc::UQ32x32ToInt64Ms( |
| source_.absolute_capture_time()->absolute_capture_timestamp); |
| } |
| |
| } // namespace blink |