blob: d3a75dd13aa34a99f1dfc900c07f4423233806f5 [file] [log] [blame]
/*
* Copyright (c) 2016 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 "modules/rtp_rtcp/source/playout_delay_oracle.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
namespace webrtc {
PlayoutDelayOracle::PlayoutDelayOracle()
: high_sequence_number_(0),
send_playout_delay_(false),
ssrc_(0),
playout_delay_{-1, -1} {}
PlayoutDelayOracle::~PlayoutDelayOracle() {}
void PlayoutDelayOracle::UpdateRequest(uint32_t ssrc,
PlayoutDelay playout_delay,
uint16_t seq_num) {
rtc::CritScope lock(&crit_sect_);
RTC_DCHECK_LE(playout_delay.min_ms, PlayoutDelayLimits::kMaxMs);
RTC_DCHECK_LE(playout_delay.max_ms, PlayoutDelayLimits::kMaxMs);
RTC_DCHECK_LE(playout_delay.min_ms, playout_delay.max_ms);
int64_t unwrapped_seq_num = unwrapper_.Unwrap(seq_num);
if (playout_delay.min_ms >= 0 &&
playout_delay.min_ms != playout_delay_.min_ms) {
send_playout_delay_ = true;
playout_delay_.min_ms = playout_delay.min_ms;
high_sequence_number_ = unwrapped_seq_num;
}
if (playout_delay.max_ms >= 0 &&
playout_delay.max_ms != playout_delay_.max_ms) {
send_playout_delay_ = true;
playout_delay_.max_ms = playout_delay.max_ms;
high_sequence_number_ = unwrapped_seq_num;
}
ssrc_ = ssrc;
}
// If an ACK is received on the packet containing the playout delay extension,
// we stop sending the extension on future packets.
void PlayoutDelayOracle::OnReceivedRtcpReportBlocks(
const ReportBlockList& report_blocks) {
rtc::CritScope lock(&crit_sect_);
for (const RTCPReportBlock& report_block : report_blocks) {
if ((ssrc_ == report_block.source_ssrc) && send_playout_delay_ &&
(report_block.extended_highest_sequence_number >
high_sequence_number_)) {
send_playout_delay_ = false;
}
}
}
} // namespace webrtc