Adding support for MediaStream and PeerConnection functionality

content/renderer/media/media_stream_impl.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/media_stream_impl.h"
 
-#include "base/string_util.h"
+#include <utility>
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/utf_string_conversions.h"
 #include "content/renderer/media/capture_video_decoder.h"
+#include "content/renderer/media/media_stream_dependency_factory.h"
+#include "content/renderer/media/media_stream_dispatcher.h"
+#include "content/renderer/media/peer_connection_handler.h"
+#include "content/renderer/media/rtc_video_decoder.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
-#include "googleurl/src/gurl.h"
+#include "content/renderer/media/video_capture_module_impl.h"
+#include "content/renderer/media/webrtc_audio_device_impl.h"
+#include "content/renderer/p2p/ipc_network_manager.h"
+#include "content/renderer/p2p/ipc_socket_factory.h"
+#include "content/renderer/p2p/socket_dispatcher.h"
+#include "jingle/glue/thread_wrapper.h"
 #include "media/base/message_loop_factory.h"
-#include "media/base/pipeline.h"
+#include "third_party/libjingle/source/talk/p2p/client/httpportallocator.h"
+#include "third_party/libjingle/source/talk/session/phone/dummydevicemanager.h"
+#include "third_party/libjingle/source/talk/session/phone/webrtcmediaengine.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamDescriptor.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamRegistry.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamSource.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
 
 namespace {
 
 static const int kVideoCaptureWidth = 352;
 static const int kVideoCaptureHeight = 288;
 static const int kVideoCaptureFramePerSecond = 30;
 
-static const int kStartOpenSessionId = 1;
-
-// TODO(wjia): remove this string when full media stream code is checked in.
-static const char kRawMediaScheme[] = "mediastream";
-
 }  // namespace
 
-MediaStreamImpl::MediaStreamImpl(VideoCaptureImplManager* vc_manager)
-    : vc_manager_(vc_manager) {
-}
-
-MediaStreamImpl::~MediaStreamImpl() {}
+int MediaStreamImpl::next_request_id_ = 0;
+
+MediaStreamImpl::MediaStreamImpl(
+    MediaStreamDispatcher* media_stream_dispatcher,
+    content::P2PSocketDispatcher* p2p_socket_dispatcher,
+    VideoCaptureImplManager* vc_manager,
+    MediaStreamDependencyFactory* dependency_factory)
+    : dependency_factory_(dependency_factory),
+      media_stream_dispatcher_(media_stream_dispatcher),
+      media_engine_(NULL),
+      p2p_socket_dispatcher_(p2p_socket_dispatcher),
+      network_manager_(NULL),
+      vc_manager_(vc_manager),
+      peer_connection_handler_(NULL),
+      message_loop_proxy_(base::MessageLoopProxy::current()),
+      signaling_thread_(NULL),
+      worker_thread_(NULL),
+      chrome_worker_thread_("Chrome_libJingle_WorkerThread"),
+      vcm_created_(false) {
+}
+
+MediaStreamImpl::~MediaStreamImpl() {
+  DCHECK(!peer_connection_handler_);
+  if (dependency_factory_.get())
+    dependency_factory_->DeletePeerConnectionFactory();
+  if (network_manager_) {
+    // The network manager needs to free its resources on the thread they were
+    // created, which is the worked thread.
+    if (chrome_worker_thread_.IsRunning()) {
+      chrome_worker_thread_.message_loop()->PostTask(FROM_HERE, base::Bind(
+          &MediaStreamImpl::DeleteIpcNetworkManager,
+          base::Unretained(this)));
+    } else {
+      NOTREACHED() << "Worker thread not running.";
+    }
+  }
+}
+
+WebKit::WebPeerConnectionHandler* MediaStreamImpl::CreatePeerConnectionHandler(
+    WebKit::WebPeerConnectionHandlerClient* client) {
+  DCHECK(CalledOnValidThread());
+  if (peer_connection_handler_) {
+    DVLOG(1) << "A PeerConnection already exists";
+    return NULL;
+  }
+
+  if (!media_engine_) {
+    media_engine_ = dependency_factory_->CreateWebRtcMediaEngine();
+  }
+
+  if (!signaling_thread_) {
+    jingle_glue::JingleThreadWrapper::EnsureForCurrentThread();
+    jingle_glue::JingleThreadWrapper::current()->set_send_allowed(true);
+    signaling_thread_ = jingle_glue::JingleThreadWrapper::current();
+  }
+
+  if (!worker_thread_) {
+    if (!chrome_worker_thread_.IsRunning()) {
+      if (!chrome_worker_thread_.Start()) {
+        LOG(ERROR) << "Could not start worker thread";
+        delete media_engine_;
+        media_engine_ = NULL;
+        signaling_thread_ = NULL;
+        return NULL;
+      }
+    }
+    base::WaitableEvent event(true, false);
+    chrome_worker_thread_.message_loop()->PostTask(
+        FROM_HERE,
+        base::Bind(&MediaStreamImpl::InitializeWorkerThread, this,
+                   &worker_thread_, &event));
+    event.Wait();
+    DCHECK(worker_thread_);
+  }
+
+  if (!network_manager_)
+    network_manager_ = new content::IpcNetworkManager(p2p_socket_dispatcher_);
+
+  if (!socket_factory_.get()) {
+    socket_factory_.reset(
+        new content::IpcPacketSocketFactory(p2p_socket_dispatcher_));
+  }
+
+  if (!dependency_factory_->PeerConnectionFactoryCreated()) {
+    if (!dependency_factory_->CreatePeerConnectionFactory(media_engine_,
+                                                          worker_thread_)) {
+      LOG(ERROR) << "Could not initialize PeerConnection factory";
+      return NULL;
+    }
+  }
+
+  peer_connection_handler_ = new PeerConnectionHandler(
+      client,
+      this,
+      dependency_factory_.get(),
+      signaling_thread_,
+      p2p_socket_dispatcher_,
+      network_manager_,
+      socket_factory_.get());
+
+  return peer_connection_handler_;
+}
+
+void MediaStreamImpl::ClosePeerConnection() {
+  DCHECK(CalledOnValidThread());
+  rtc_video_decoder_ = NULL;
+  media_engine_->SetVideoCaptureModule(NULL);
+  vcm_created_ = false;
+  peer_connection_handler_ = NULL;
+}
+
+bool MediaStreamImpl::SetVideoCaptureModule(const std::string& label) {
+  DCHECK(CalledOnValidThread());
+  if (vcm_created_)
+    return true;
+  // Set the capture device.
+  // TODO(grunell): Instead of using the first track, the selected track
+  // should be used.
+  int id = media_stream_dispatcher_->video_session_id(label, 0);
+  if (id == media_stream::StreamDeviceInfo::kNoId)
+    return false;
+  webrtc::VideoCaptureModule* vcm =
+      new VideoCaptureModuleImpl(id, vc_manager_.get());
+  vcm_created_ = true;
+  media_engine_->SetVideoCaptureModule(vcm);
+  return true;
+}
+
+void MediaStreamImpl::requestUserMedia(
+    const WebKit::WebUserMediaRequest& user_media_request,
+    const WebKit::WebVector<WebKit::WebMediaStreamSource>&
+        media_stream_source_vector) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(!user_media_request.isNull());
+
+  int request_id = next_request_id_++;
+
+  bool audio = user_media_request.audio();
+  media_stream::StreamOptions::VideoOption video_option =
+      media_stream::StreamOptions::kNoCamera;
+  if (user_media_request.video()) {
+    // If no preference is set, use user facing camera.
+    video_option = media_stream::StreamOptions::kFacingUser;
+    if (user_media_request.cameraPreferenceUser() &&
+        user_media_request.cameraPreferenceEnvironment()) {
+      video_option = media_stream::StreamOptions::kFacingBoth;
+    } else if (user_media_request.cameraPreferenceEnvironment()) {
+      video_option = media_stream::StreamOptions::kFacingEnvironment;
+    }
+  }
+
+  std::string security_origin = UTF16ToUTF8(
+      user_media_request.securityOrigin().toString());
+
+  DVLOG(1) << "MediaStreamImpl::generateStream(" << request_id << ", [ "
+           << (audio ? "audio " : "")
+           << ((user_media_request.cameraPreferenceUser()) ?
+               "video_facing_user " : "")
+           << ((user_media_request.cameraPreferenceEnvironment()) ?
+               "video_facing_environment " : "") << "], "
+           << security_origin << ")";
+
+  user_media_requests_.insert(
+      std::pair<int, WebKit::WebUserMediaRequest>(
+          request_id, user_media_request));
+
+  media_stream_dispatcher_->GenerateStream(
+      request_id,
+      this,
+      media_stream::StreamOptions(audio, video_option),
+      security_origin);
+}
+
+void MediaStreamImpl::cancelUserMediaRequest(
+    const WebKit::WebUserMediaRequest& user_media_request) {
+  // TODO(grunell): Implement.
+  NOTIMPLEMENTED();
+}
 
 scoped_refptr<media::VideoDecoder> MediaStreamImpl::GetVideoDecoder(
-    const GURL& url, media::MessageLoopFactory* message_loop_factory) {
-  bool raw_media = (url.spec().find(kRawMediaScheme) == 0);
-  media::VideoDecoder* decoder = NULL;
-  if (raw_media) {
+    const GURL& url,
+    media::MessageLoopFactory* message_loop_factory) {
+  DCHECK(CalledOnValidThread());
+  WebKit::WebMediaStreamDescriptor descriptor(
+      WebKit::WebMediaStreamRegistry::lookupMediaStreamDescriptor(url));
+  if (descriptor.isNull())
+    return NULL;  // This is not a valid stream.
+  WebKit::WebVector<WebKit::WebMediaStreamSource> source_vector;
+  descriptor.sources(source_vector);
+  std::string label;
+  for (size_t i = 0; i < source_vector.size(); ++i) {
+    if (source_vector[i].type() == WebKit::WebMediaStreamSource::TypeVideo) {
+      label = UTF16ToUTF8(source_vector[i].id());
+      break;
+    }
+  }
+  if (label.empty())
+    return NULL;
+
+  scoped_refptr<media::VideoDecoder> decoder;
+  if (media_stream_dispatcher_->IsStream(label)) {
+    // It's a local stream.
+    int video_session_id = media_stream_dispatcher_->video_session_id(label, 0);
     media::VideoCapture::VideoCaptureCapability capability;
     capability.width = kVideoCaptureWidth;
     capability.height = kVideoCaptureHeight;
     capability.max_fps = kVideoCaptureFramePerSecond;
     capability.expected_capture_delay = 0;
     capability.raw_type = media::VideoFrame::I420;
     capability.interlaced = false;
-
     decoder = new CaptureVideoDecoder(
-        message_loop_factory->GetMessageLoopProxy("CaptureVideoDecoder").get(),
-        kStartOpenSessionId, vc_manager_.get(), capability);
+        message_loop_factory->GetMessageLoopProxy("CaptureVideoDecoderThread"),
+        video_session_id,
+        vc_manager_.get(),
+        capability);
+  } else {
+    // It's a remote stream.
+    size_t found = label.rfind("-remote");
+    if (found != std::string::npos)
+      label = label.substr(0, found);
+    if (rtc_video_decoder_.get()) {
+      // The renderer is used by PeerConnection, release it first.
+      if (peer_connection_handler_)
+        peer_connection_handler_->SetVideoRenderer(label, NULL);
+    }
+    rtc_video_decoder_ = new RTCVideoDecoder(
+        message_loop_factory->GetMessageLoop("RtcVideoDecoderThread"),
+        url.spec());
+    decoder = rtc_video_decoder_;
+    if (peer_connection_handler_)
+      peer_connection_handler_->SetVideoRenderer(label, rtc_video_decoder_);
   }
   return decoder;
 }
+
+void MediaStreamImpl::OnStreamGenerated(
+    int request_id,
+    const std::string& label,
+    const media_stream::StreamDeviceInfoArray& audio_array,
+    const media_stream::StreamDeviceInfoArray& video_array) {
+  DCHECK(CalledOnValidThread());
+
+  // We only support max one audio track and one video track. If the UI
+  // for selecting device starts to allow several devices, we must implement
+  // handling for this.
+  DCHECK_LE(audio_array.size(), 1u);
+  DCHECK_LE(video_array.size(), 1u);
+  WebKit::WebVector<WebKit::WebMediaStreamSource> source_vector(
+      audio_array.size() + video_array.size());
+
+  WebKit::WebString track_label_audio(UTF8ToUTF16("AudioDevice"));
+  WebKit::WebString track_label_video(UTF8ToUTF16("VideoCapture"));
+  size_t track_num = source_vector.size();
+  while (track_num--) {
+    if (track_num < audio_array.size()) {
+      source_vector[track_num].initialize(
+          UTF8ToUTF16(label),
+          WebKit::WebMediaStreamSource::TypeAudio,
+          track_label_audio);
+    } else {
+      source_vector[track_num].initialize(
+          UTF8ToUTF16(label),
+          WebKit::WebMediaStreamSource::TypeVideo,
+          track_label_video);
+    }
+  }
+
+  MediaRequestMap::iterator it = user_media_requests_.find(request_id);
+  if (it == user_media_requests_.end()) {
+    DVLOG(1) << "Request ID not found";
+    return;
+  }
+  WebKit::WebUserMediaRequest user_media_request = it->second;
+  user_media_requests_.erase(it);
+  stream_labels_.push_back(label);
+
+  user_media_request.requestSucceeded(source_vector);
+}
+
+void MediaStreamImpl::OnStreamGenerationFailed(int request_id) {
+  DCHECK(CalledOnValidThread());
+  DVLOG(1) << "MediaStreamImpl::OnStreamGenerationFailed("
+           << request_id << ")";
+  MediaRequestMap::iterator it = user_media_requests_.find(request_id);
+  if (it == user_media_requests_.end()) {
+    DVLOG(1) << "Request ID not found";
+    return;
+  }
+  WebKit::WebUserMediaRequest user_media_request = it->second;
+  user_media_requests_.erase(it);
+
+  user_media_request.requestFailed();
+}
+
+void MediaStreamImpl::OnVideoDeviceFailed(const std::string& label,
+                                          int index) {
+  DCHECK(CalledOnValidThread());
+  DVLOG(1) << "MediaStreamImpl::OnVideoDeviceFailed("
+           << label << ", " << index << ")";
+  // TODO(grunell): Implement. Currently not supported in WebKit.
+  NOTIMPLEMENTED();
+}
+
+void MediaStreamImpl::OnAudioDeviceFailed(const std::string& label,
+                                          int index) {
+  DCHECK(CalledOnValidThread());
+  DVLOG(1) << "MediaStreamImpl::OnAudioDeviceFailed("
+           << label << ", " << index << ")";
+  // TODO(grunell): Implement. Currently not supported in WebKit.
+  NOTIMPLEMENTED();
+}
+
+void MediaStreamImpl::InitializeWorkerThread(talk_base::Thread** thread,
+                                             base::WaitableEvent* event) {
+  jingle_glue::JingleThreadWrapper::EnsureForCurrentThread();
+  jingle_glue::JingleThreadWrapper::current()->set_send_allowed(true);
+  *thread = jingle_glue::JingleThreadWrapper::current();
+  event->Signal();
+}
+
+void MediaStreamImpl::DeleteIpcNetworkManager() {
+  DCHECK_EQ(MessageLoop::current(), chrome_worker_thread_.message_loop());
+  delete network_manager_;
+  network_manager_ = NULL;
+}