1 files changed, 107 insertions, 0 deletions
diff --git a/third_party/libwebrtc/test/test_video_capturer.cc b/third_party/libwebrtc/test/test_video_capturer.cc
new file mode 100644
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+++ b/third_party/libwebrtc/test/test_video_capturer.cc
@@ -0,0 +1,107 @@
+/*
+ *  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