Add framerate to VideoSinkWants and ability to signal on overuse

webrtc/test/vcm_capturer.cc

 /*
  *  Copyright (c) 2013 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 "webrtc/test/vcm_capturer.h"
 
+#include "webrtc/base/logging.h"
 #include "webrtc/modules/video_capture/video_capture_factory.h"
 #include "webrtc/video_send_stream.h"
 
 namespace webrtc {
 namespace test {
 
-VcmCapturer::VcmCapturer() : started_(false), sink_(nullptr), vcm_(NULL) {}
+VcmCapturer::VcmCapturer() : started_(false), sink_(nullptr), vcm_(nullptr) {}
 
 bool VcmCapturer::Init(size_t width, size_t height, size_t target_fps) {
-  VideoCaptureModule::DeviceInfo* device_info =
-      VideoCaptureFactory::CreateDeviceInfo();
+  std::unique_ptr<VideoCaptureModule::DeviceInfo> device_info(
+      VideoCaptureFactory::CreateDeviceInfo());
 
   char device_name[256];
   char unique_name[256];
   if (device_info->GetDeviceName(0, device_name, sizeof(device_name),
                                  unique_name, sizeof(unique_name)) !=
       0) {
     Destroy();
     return false;
   }
 
   vcm_ = webrtc::VideoCaptureFactory::Create(unique_name);
   vcm_->RegisterCaptureDataCallback(this);
 
   device_info->GetCapability(vcm_->CurrentDeviceName(), 0, capability_);
-  delete device_info;
 
   capability_.width = static_cast<int32_t>(width);
   capability_.height = static_cast<int32_t>(height);
   capability_.maxFPS = static_cast<int32_t>(target_fps);
   capability_.rawType = kVideoI420;
 
   if (vcm_->StartCapture(capability_) != 0) {
     Destroy();
     return false;
   }
 
-  assert(vcm_->CaptureStarted());
+  RTC_CHECK(vcm_->CaptureStarted());
 
   return true;
 }
 
 VcmCapturer* VcmCapturer::Create(size_t width,
                                  size_t height,
                                  size_t target_fps) {
-  VcmCapturer* vcm_capturer = new VcmCapturer();
+  std::unique_ptr<VcmCapturer> vcm_capturer(new VcmCapturer());
   if (!vcm_capturer->Init(width, height, target_fps)) {
-    // TODO(pbos): Log a warning that this failed.
-    delete vcm_capturer;
-    return NULL;
+    LOG(LS_WARNING) << "Failed to create VcmCapturer(w = " << width
+                    << ", h = " << height << ", fps = " << target_fps << ")";
+    return nullptr;
   }
-  return vcm_capturer;
+  return vcm_capturer.release();
 }
 
 
 void VcmCapturer::Start() {
   rtc::CritScope lock(&crit_);
   started_ = true;
 }
 
 void VcmCapturer::Stop() {
   rtc::CritScope lock(&crit_);
   started_ = false;
 }
 
 void VcmCapturer::AddOrUpdateSink(rtc::VideoSinkInterface<VideoFrame>* sink,
                                   const rtc::VideoSinkWants& wants) {
   rtc::CritScope lock(&crit_);
   RTC_CHECK(!sink_ || sink_ == sink);
   sink_ = sink;
+  VideoCapturer::AddOrUpdateSink(sink, wants);
 }
 
 void VcmCapturer::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
   rtc::CritScope lock(&crit_);
   RTC_CHECK(sink_ == sink);
   sink_ = nullptr;
 }
 
 void VcmCapturer::Destroy() {
   if (!vcm_)
     return;
 
   vcm_->StopCapture();
   vcm_->DeRegisterCaptureDataCallback();
   // Release reference to VCM.
   vcm_ = nullptr;
 }
 
 VcmCapturer::~VcmCapturer() { Destroy(); }
 
 void VcmCapturer::OnFrame(const VideoFrame& frame) {
   rtc::CritScope lock(&crit_);
-  if (started_ && sink_)
-    sink_->OnFrame(frame);
+  if (started_ && sink_) {
+    rtc::Optional<VideoFrame> out_frame = AdaptFrame(frame);
+    if (out_frame)
+      sink_->OnFrame(*out_frame);
+  }
 }
 
 }  // test
 }  // webrtc