1 files changed, 44 insertions, 0 deletions
diff --git a/third_party/libwebrtc/examples/unityplugin/video_observer.cc b/third_party/libwebrtc/examples/unityplugin/video_observer.cc
new file mode 100644
index 0000000000..7e33b08e27
--- /dev/null
+++ b/third_party/libwebrtc/examples/unityplugin/video_observer.cc
@@ -0,0 +1,44 @@
+/*
+ *  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 "examples/unityplugin/video_observer.h"
+
+void VideoObserver::SetVideoCallback(I420FRAMEREADY_CALLBACK callback) {
+  std::lock_guard<std::mutex> lock(mutex);
+  OnI420FrameReady = callback;
+}
+
+void VideoObserver::OnFrame(const webrtc::VideoFrame& frame) {
+  std::unique_lock<std::mutex> lock(mutex);
+  if (!OnI420FrameReady)
+    return;
+
+  rtc::scoped_refptr<webrtc::VideoFrameBuffer> buffer(
+      frame.video_frame_buffer());
+
+  if (buffer->type() != webrtc::VideoFrameBuffer::Type::kI420A) {
+    rtc::scoped_refptr<webrtc::I420BufferInterface> i420_buffer =
+        buffer->ToI420();
+    OnI420FrameReady(i420_buffer->DataY(), i420_buffer->DataU(),
+                     i420_buffer->DataV(), nullptr, i420_buffer->StrideY(),
+                     i420_buffer->StrideU(), i420_buffer->StrideV(), 0,
+                     frame.width(), frame.height());
+
+  } else {
+    // The buffer has alpha channel.
+    const webrtc::I420ABufferInterface* i420a_buffer = buffer->GetI420A();
+
+    OnI420FrameReady(i420a_buffer->DataY(), i420a_buffer->DataU(),
+                     i420a_buffer->DataV(), i420a_buffer->DataA(),
+                     i420a_buffer->StrideY(), i420a_buffer->StrideU(),
+                     i420a_buffer->StrideV(), i420a_buffer->StrideA(),
+                     frame.width(), frame.height());
+  }
+}