Update PeerConnection_client to open a video capture device.

BUG=
TEST=

Review URL: http://webrtc-codereview.appspot.com/205001

git-svn-id: http://webrtc.googlecode.com/svn/trunk@707 4adac7df-926f-26a2-2b94-8c16560cd09d

third_party_mods/libjingle/source/talk/examples/peerconnection_client/conductor.cc

@@ -12,6 +12,7 @@
 
 #include <utility>
 
+#include "modules/video_capture/main/source/video_capture_impl.h"
 #include "talk/examples/peerconnection_client/defaults.h"
 #include "talk/base/common.h"
 #include "talk/base/logging.h"
@@ -213,14 +214,37 @@ void Conductor::ConnectToPeer(int peer_id) {
 
   if (InitializePeerConnection()) {
     peer_id_ = peer_id;
-    main_wnd_->SwitchToStreamingUI();
-    EnsureStreamingUI();
     AddStreams();
   } else {
     main_wnd_->MessageBox("Error", "Failed to initialize PeerConnection", true);
   }
 }
 
+scoped_refptr<webrtc::VideoCaptureModule> Conductor::OpenVideoCaptureDevice() {
+  webrtc::VideoCaptureModule::DeviceInfo* device_info(
+      webrtc::videocapturemodule::VideoCaptureImpl::CreateDeviceInfo(0));
+  scoped_refptr<webrtc::VideoCaptureModule> video_device;
+
+  const size_t kMaxDeviceNameLength = 128;
+  const size_t kMaxUniqueIdLength = 256;
+  uint8 device_name[kMaxDeviceNameLength];
+  uint8 unique_id[kMaxUniqueIdLength];
+
+  const size_t device_count = device_info->NumberOfDevices();
+  for (size_t i = 0; i < device_count; ++i) {
+    // Get the name of the video capture device.
+    device_info->GetDeviceName(i, device_name, kMaxDeviceNameLength, unique_id,
+        kMaxUniqueIdLength);
+    // Try to open this device.
+    video_device =
+        webrtc::videocapturemodule::VideoCaptureImpl::Create(0, unique_id);
+    if (video_device.get())
+      break;
+  }
+  webrtc::videocapturemodule::VideoCaptureImpl::DestroyDeviceInfo(device_info);
+  return video_device;
+}
+
 void Conductor::AddStreams() {
   if (active_streams_.find(kStreamLabel) != active_streams_.end())
     return;  // Already added.
@@ -229,7 +253,7 @@ void Conductor::AddStreams() {
       webrtc::CreateLocalAudioTrack(kAudioLabel, NULL));
 
   scoped_refptr<webrtc::LocalVideoTrack> video_track(
-      webrtc::CreateLocalVideoTrack(kVideoLabel, NULL));
+      webrtc::CreateLocalVideoTrack(kVideoLabel, OpenVideoCaptureDevice()));
 
   scoped_refptr<webrtc::VideoRenderer> renderer(webrtc::CreateVideoRenderer(
       main_wnd_->local_renderer()));
@@ -245,6 +269,7 @@ void Conductor::AddStreams() {
   typedef std::pair<std::string, scoped_refptr<webrtc::MediaStream> >
       MediaStreamPair;
   active_streams_.insert(MediaStreamPair(stream->label(), stream));
+  main_wnd_->SwitchToStreamingUI();
 }
 
 void Conductor::DisconnectFromCurrentPeer() {

third_party_mods/libjingle/source/talk/examples/peerconnection_client/conductor.h

@@ -23,6 +23,10 @@
 #include "talk/app/webrtc_dev/peerconnection.h"
 #include "talk/base/scoped_ptr.h"
 
+namespace webrtc {
+class VideoCaptureModule;
+}  // namespace webrtc
+
 namespace cricket {
 class VideoRenderer;
 }  // namespace cricket
@@ -54,6 +58,7 @@ class Conductor
   void DeletePeerConnection();
   void EnsureStreamingUI();
   void AddStreams();
+  scoped_refptr<webrtc::VideoCaptureModule> OpenVideoCaptureDevice();
 
   //
   // PeerConnectionObserver implementation.

third_party_mods/libjingle/source/talk/examples/peerconnection_client/peerconnection_client.gyp

@@ -26,12 +26,16 @@
           ],
           'dependencies': [
             '../../../../libjingle.gyp:libjingle_app',
+            '../../../../../../src/modules/modules.gyp:video_capture_module',
+            '../../../../../../src/system_wrappers/source/'
+                'system_wrappers.gyp:system_wrappers',
             # TODO(tommi): Switch to this and remove specific gtk dependency
             # sections below for cflags and link_settings.
             # '<(DEPTH)/build/linux/system.gyp:gtk',
           ],
           'include_dirs': [           
             '../../../',
+            '../../../../../../src', # webrtc modules
             #TODO(perkj): Remove when this project is in the correct folder.
              '../../../../../../third_party/libjingle/source/',
           ],