1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "video/encoder_rtcp_feedback.h" 12 13 #include "rtc_base/checks.h" 14 #include "video/video_stream_encoder.h" 15 16 static const int kMinKeyFrameRequestIntervalMs = 300; 17 18 namespace webrtc { 19 EncoderRtcpFeedback(Clock * clock,const std::vector<uint32_t> & ssrcs,VideoStreamEncoder * encoder)20EncoderRtcpFeedback::EncoderRtcpFeedback(Clock* clock, 21 const std::vector<uint32_t>& ssrcs, 22 VideoStreamEncoder* encoder) 23 : clock_(clock), 24 ssrcs_(ssrcs), 25 video_stream_encoder_(encoder), 26 time_last_intra_request_ms_(ssrcs.size(), -1) { 27 RTC_DCHECK(!ssrcs.empty()); 28 } 29 HasSsrc(uint32_t ssrc)30bool EncoderRtcpFeedback::HasSsrc(uint32_t ssrc) { 31 for (uint32_t registered_ssrc : ssrcs_) { 32 if (registered_ssrc == ssrc) { 33 return true; 34 } 35 } 36 return false; 37 } 38 GetStreamIndex(uint32_t ssrc)39size_t EncoderRtcpFeedback::GetStreamIndex(uint32_t ssrc) { 40 for (size_t i = 0; i < ssrcs_.size(); ++i) { 41 if (ssrcs_[i] == ssrc) 42 return i; 43 } 44 RTC_NOTREACHED() << "Unknown ssrc " << ssrc; 45 return 0; 46 } 47 OnReceivedIntraFrameRequest(uint32_t ssrc)48void EncoderRtcpFeedback::OnReceivedIntraFrameRequest(uint32_t ssrc) { 49 RTC_DCHECK(HasSsrc(ssrc)); 50 size_t index = GetStreamIndex(ssrc); 51 { 52 // TODO(mflodman): Move to VideoStreamEncoder after some more changes making 53 // it easier to test there. 54 int64_t now_ms = clock_->TimeInMilliseconds(); 55 rtc::CritScope lock(&crit_); 56 if (time_last_intra_request_ms_[index] + kMinKeyFrameRequestIntervalMs > 57 now_ms) { 58 return; 59 } 60 time_last_intra_request_ms_[index] = now_ms; 61 } 62 63 video_stream_encoder_->OnReceivedIntraFrameRequest(index); 64 } 65 66 } // namespace webrtc 67