rhubarb-lip-sync/rhubarb/lib/webrtc-8d2248ff/webrtc/video/encoder_state_feedback.cc

98 lines
2.9 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.
*/
#include "webrtc/video/encoder_state_feedback.h"
#include "webrtc/base/checks.h"
#include "webrtc/video/vie_encoder.h"
static const int kMinKeyFrameRequestIntervalMs = 300;
namespace webrtc {
EncoderStateFeedback::EncoderStateFeedback(Clock* clock,
const std::vector<uint32_t>& ssrcs,
ViEEncoder* encoder)
: clock_(clock),
ssrcs_(ssrcs),
vie_encoder_(encoder),
time_last_intra_request_ms_(ssrcs.size(), -1) {
RTC_DCHECK(!ssrcs.empty());
}
bool EncoderStateFeedback::HasSsrc(uint32_t ssrc) {
for (uint32_t registered_ssrc : ssrcs_) {
if (registered_ssrc == ssrc)
return true;
}
return false;
}
size_t EncoderStateFeedback::GetStreamIndex(uint32_t ssrc) {
for (size_t i = 0; i < ssrcs_.size(); ++i) {
if (ssrcs_[i] == ssrc)
return i;
}
RTC_NOTREACHED() << "Unknown ssrc " << ssrc;
return 0;
}
void EncoderStateFeedback::OnReceivedIntraFrameRequest(uint32_t ssrc) {
if (!HasSsrc(ssrc))
return;
size_t index = GetStreamIndex(ssrc);
{
int64_t now_ms = clock_->TimeInMilliseconds();
rtc::CritScope lock(&crit_);
if (time_last_intra_request_ms_[index] + kMinKeyFrameRequestIntervalMs >
now_ms) {
return;
}
time_last_intra_request_ms_[index] = now_ms;
}
vie_encoder_->OnReceivedIntraFrameRequest(index);
}
void EncoderStateFeedback::OnReceivedSLI(uint32_t ssrc, uint8_t picture_id) {
if (!HasSsrc(ssrc))
return;
vie_encoder_->OnReceivedSLI(picture_id);
}
void EncoderStateFeedback::OnReceivedRPSI(uint32_t ssrc, uint64_t picture_id) {
if (!HasSsrc(ssrc))
return;
vie_encoder_->OnReceivedRPSI(picture_id);
}
// Sending SSRCs for this encoder should never change since they are configured
// once and not reconfigured, however, OnLocalSsrcChanged is called when the
// RtpModules are created with a different SSRC than what will be used in the
// end.
// TODO(perkj): Can we make sure the RTP module is created with the right SSRC
// from the beginning so this method is not triggered during creation ?
void EncoderStateFeedback::OnLocalSsrcChanged(uint32_t old_ssrc,
uint32_t new_ssrc) {
if (!RTC_DCHECK_IS_ON)
return;
if (old_ssrc == 0) // old_ssrc == 0 during creation.
return;
// SSRC shouldn't change to something we haven't already registered with the
// encoder.
RTC_DCHECK(HasSsrc(new_ssrc));
}
} // namespace webrtc