1 files changed, 66 insertions, 0 deletions
diff --git a/third_party/libwebrtc/webrtc/video/encoder_rtcp_feedback.cc b/third_party/libwebrtc/webrtc/video/encoder_rtcp_feedback.cc
new file mode 100644
index 0000000000..5a1194f966
--- /dev/null
+++ b/third_party/libwebrtc/webrtc/video/encoder_rtcp_feedback.cc
@@ -0,0 +1,66 @@
+/*
+ *  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,
+                                         VideoStreamEncoder* 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;
+  }
+
+  video_stream_encoder_->OnReceivedIntraFrameRequest(index);
+}
+
+}  // namespace webrtc