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diff --git a/third_party/libwebrtc/test/test_video_capturer.cc b/third_party/libwebrtc/test/test_video_capturer.cc
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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 "test/test_video_capturer.h"
+
+#include <algorithm>
+
+#include "api/scoped_refptr.h"
+#include "api/video/i420_buffer.h"
+#include "api/video/video_frame_buffer.h"
+#include "api/video/video_rotation.h"
+
+namespace webrtc {
+namespace test {
+TestVideoCapturer::~TestVideoCapturer() = default;
+
+void TestVideoCapturer::OnOutputFormatRequest(
+ int width,
+ int height,
+ const absl::optional<int>& max_fps) {
+ absl::optional<std::pair<int, int>> target_aspect_ratio =
+ std::make_pair(width, height);
+ absl::optional<int> max_pixel_count = width * height;
+ video_adapter_.OnOutputFormatRequest(target_aspect_ratio, max_pixel_count,
+ max_fps);
+}
+
+void TestVideoCapturer::OnFrame(const VideoFrame& original_frame) {
+ int cropped_width = 0;
+ int cropped_height = 0;
+ int out_width = 0;
+ int out_height = 0;
+
+ VideoFrame frame = MaybePreprocess(original_frame);
+
+ if (!video_adapter_.AdaptFrameResolution(
+ frame.width(), frame.height(), frame.timestamp_us() * 1000,
+ &cropped_width, &cropped_height, &out_width, &out_height)) {
+ // Drop frame in order to respect frame rate constraint.
+ return;
+ }
+
+ if (out_height != frame.height() || out_width != frame.width()) {
+ // Video adapter has requested a down-scale. Allocate a new buffer and
+ // return scaled version.
+ // For simplicity, only scale here without cropping.
+ rtc::scoped_refptr<I420Buffer> scaled_buffer =
+ I420Buffer::Create(out_width, out_height);
+ scaled_buffer->ScaleFrom(*frame.video_frame_buffer()->ToI420());
+ VideoFrame::Builder new_frame_builder =
+ VideoFrame::Builder()
+ .set_video_frame_buffer(scaled_buffer)
+ .set_rotation(kVideoRotation_0)
+ .set_timestamp_us(frame.timestamp_us())
+ .set_id(frame.id());
+ if (frame.has_update_rect()) {
+ VideoFrame::UpdateRect new_rect = frame.update_rect().ScaleWithFrame(
+ frame.width(), frame.height(), 0, 0, frame.width(), frame.height(),
+ out_width, out_height);
+ new_frame_builder.set_update_rect(new_rect);
+ }
+ broadcaster_.OnFrame(new_frame_builder.build());
+
+ } else {
+ // No adaptations needed, just return the frame as is.
+ broadcaster_.OnFrame(frame);
+ }
+}
+
+rtc::VideoSinkWants TestVideoCapturer::GetSinkWants() {
+ return broadcaster_.wants();
+}
+
+void TestVideoCapturer::AddOrUpdateSink(
+ rtc::VideoSinkInterface<VideoFrame>* sink,
+ const rtc::VideoSinkWants& wants) {
+ broadcaster_.AddOrUpdateSink(sink, wants);
+ UpdateVideoAdapter();
+}
+
+void TestVideoCapturer::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
+ broadcaster_.RemoveSink(sink);
+ UpdateVideoAdapter();
+}
+
+void TestVideoCapturer::UpdateVideoAdapter() {
+ video_adapter_.OnSinkWants(broadcaster_.wants());
+}
+
+VideoFrame TestVideoCapturer::MaybePreprocess(const VideoFrame& frame) {
+ MutexLock lock(&lock_);
+ if (preprocessor_ != nullptr) {
+ return preprocessor_->Preprocess(frame);
+ } else {
+ return frame;
+ }
+}
+
+} // namespace test
+} // namespace webrtc