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/*
* 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 "video/encoder_rtcp_feedback.h"
#include "rtc_base/checks.h"
#include "video/video_stream_encoder.h"
static const int kMinKeyFrameRequestIntervalMs = 300;
namespace webrtc {
EncoderRtcpFeedback::EncoderRtcpFeedback(Clock* clock,
const std::vector<uint32_t>& ssrcs,
VideoStreamEncoderInterface* encoder)
: clock_(clock),
ssrcs_(ssrcs),
video_stream_encoder_(encoder),
time_last_intra_request_ms_(ssrcs.size(), -1) {
RTC_DCHECK(!ssrcs.empty());
}
bool EncoderRtcpFeedback::HasSsrc(uint32_t ssrc) {
for (uint32_t registered_ssrc : ssrcs_) {
if (registered_ssrc == ssrc) {
return true;
}
}
return false;
}
size_t EncoderRtcpFeedback::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 EncoderRtcpFeedback::OnReceivedIntraFrameRequest(uint32_t ssrc) {
RTC_DCHECK(HasSsrc(ssrc));
size_t index = GetStreamIndex(ssrc);
{
// TODO(mflodman): Move to VideoStreamEncoder after some more changes making
// it easier to test there.
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;
}
// Always produce key frame for all streams.
video_stream_encoder_->SendKeyFrame();
}
} // namespace webrtc
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