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/*
* Copyright (c) 2017 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/rtcp_transceiver.h"
#include <utility>
#include "rtc_base/checks.h"
#include "rtc_base/event.h"
#include "rtc_base/ptr_util.h"
#include "rtc_base/timeutils.h"
namespace webrtc {
RtcpTransceiver::RtcpTransceiver(const RtcpTransceiverConfig& config)
: task_queue_(config.task_queue),
rtcp_transceiver_(rtc::MakeUnique<RtcpTransceiverImpl>(config)),
ptr_factory_(rtcp_transceiver_.get()),
// Creating first weak ptr can be done on any thread, but is not
// thread-safe, thus do it at construction. Creating second (e.g. making a
// copy) is thread-safe.
ptr_(ptr_factory_.GetWeakPtr()) {
RTC_DCHECK(task_queue_);
}
RtcpTransceiver::~RtcpTransceiver() {
if (task_queue_->IsCurrent())
return;
rtc::Event done(false, false);
// TODO(danilchap): Merge cleanup into main closure when task queue does not
// silently drop tasks.
task_queue_->PostTask(rtc::NewClosure(
[this] {
// Destructor steps that has to run on the task_queue_.
ptr_factory_.InvalidateWeakPtrs();
rtcp_transceiver_.reset();
},
/*cleanup=*/[&done] { done.Set(); }));
// Wait until destruction is complete to be sure weak pointers invalidated and
// rtcp_transceiver destroyed on the queue while |this| still valid.
done.Wait(rtc::Event::kForever);
RTC_CHECK(!rtcp_transceiver_) << "Task queue is too busy to handle rtcp";
}
void RtcpTransceiver::ReceivePacket(rtc::CopyOnWriteBuffer packet) {
rtc::WeakPtr<RtcpTransceiverImpl> ptr = ptr_;
int64_t now_us = rtc::TimeMicros();
task_queue_->PostTask([ptr, packet, now_us] {
if (ptr)
ptr->ReceivePacket(packet, now_us);
});
}
void RtcpTransceiver::SendCompoundPacket() {
rtc::WeakPtr<RtcpTransceiverImpl> ptr = ptr_;
task_queue_->PostTask([ptr] {
if (ptr)
ptr->SendCompoundPacket();
});
}
void RtcpTransceiver::SetRemb(int bitrate_bps, std::vector<uint32_t> ssrcs) {
// TODO(danilchap): Replace with lambda with move capture when available.
struct SetRembClosure {
void operator()() {
if (ptr)
ptr->SetRemb(bitrate_bps, std::move(ssrcs));
}
rtc::WeakPtr<RtcpTransceiverImpl> ptr;
int bitrate_bps;
std::vector<uint32_t> ssrcs;
};
task_queue_->PostTask(SetRembClosure{ptr_, bitrate_bps, std::move(ssrcs)});
}
void RtcpTransceiver::UnsetRemb() {
rtc::WeakPtr<RtcpTransceiverImpl> ptr = ptr_;
task_queue_->PostTask([ptr] {
if (ptr)
ptr->UnsetRemb();
});
}
void RtcpTransceiver::SendNack(uint32_t ssrc,
std::vector<uint16_t> sequence_numbers) {
// TODO(danilchap): Replace with lambda with move capture when available.
struct Closure {
void operator()() {
if (ptr)
ptr->SendNack(ssrc, std::move(sequence_numbers));
}
rtc::WeakPtr<RtcpTransceiverImpl> ptr;
uint32_t ssrc;
std::vector<uint16_t> sequence_numbers;
};
task_queue_->PostTask(Closure{ptr_, ssrc, std::move(sequence_numbers)});
}
void RtcpTransceiver::SendPictureLossIndication(std::vector<uint32_t> ssrcs) {
// TODO(danilchap): Replace with lambda with move capture when available.
struct Closure {
void operator()() {
if (ptr)
ptr->SendPictureLossIndication(ssrcs);
}
rtc::WeakPtr<RtcpTransceiverImpl> ptr;
std::vector<uint32_t> ssrcs;
};
task_queue_->PostTask(Closure{ptr_, std::move(ssrcs)});
}
void RtcpTransceiver::SendFullIntraRequest(std::vector<uint32_t> ssrcs) {
// TODO(danilchap): Replace with lambda with move capture when available.
struct Closure {
void operator()() {
if (ptr)
ptr->SendFullIntraRequest(ssrcs);
}
rtc::WeakPtr<RtcpTransceiverImpl> ptr;
std::vector<uint32_t> ssrcs;
};
task_queue_->PostTask(Closure{ptr_, std::move(ssrcs)});
}
} // namespace webrtc
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