MediaStreamDispatcher

This is the second Chromium patch needed to support media streams 
http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#video-conferencing-and-peer-to-peer-communication. The first patch is here http://codereview.chromium.org/7192007/. 
The patch contain types needed in both the render and browser process and MediaStreamDispatcher that is used for sending request from the render process to the browser process for granting a webpage access to audio input and video capture devices.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7184010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@90752 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 201 insertions, 0 deletions

diff --git a/content/renderer/media/media_stream_dispatcher_unittest.cc b/content/renderer/media/media_stream_dispatcher_unittest.cc
new file mode 100644
index 0000000..c765d81
--- /dev/null
+++ b/content/renderer/media/media_stream_dispatcher_unittest.cc
@@ -0,0 +1,201 @@
+// Copyright (c) 2011 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 <string>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "content/common/media/media_stream_messages.h"
+#include "content/renderer/media/media_stream_dispatcher.h"
+#include "content/renderer/media/media_stream_dispatcher_eventhandler.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+const int kRouteId = 0;
+const int kAudioSessionId = 3;
+const int kVideoSessionId = 5;
+const int kRequestId1 = 10;
+const int kRequestId2 = 20;
+
+class MockMediaStreamDispatcherEventHandler
+    : public MediaStreamDispatcherEventHandler {
+ public:
+  MockMediaStreamDispatcherEventHandler()
+      : request_id_(-1),
+        audio_failed(false),
+        video_failed(false) {}
+
+  virtual void OnStreamGenerated(
+      int request_id,
+      const std::string &label,
+      const media_stream::StreamDeviceInfoArray& audio_device_array,
+      const media_stream::StreamDeviceInfoArray& video_device_array) {
+    request_id_ = request_id;
+    label_ = label;
+  }
+
+  virtual void OnStreamGenerationFailed(int request_id) {
+    request_id_ = request_id;
+  }
+
+  virtual void OnAudioDeviceFailed(const std::string& label,
+                                   int index) {
+    audio_failed = true;
+  }
+
+  virtual void OnVideoDeviceFailed(const std::string& label,
+                                   int index) {
+    video_failed = true;
+  }
+
+  int request_id_;
+  std::string label_;
+  bool audio_failed;
+  bool video_failed;
+
+  DISALLOW_COPY_AND_ASSIGN(MockMediaStreamDispatcherEventHandler);
+};
+
+}  // namespace
+
+TEST(MediaStreamDispatcherTest, Basic) {
+  scoped_ptr<MediaStreamDispatcher> dispatcher(new MediaStreamDispatcher(NULL));
+  scoped_ptr<MockMediaStreamDispatcherEventHandler>
+      handler(new MockMediaStreamDispatcherEventHandler);
+  media_stream::StreamOptions components(
+      true, media_stream::StreamOptions::kFacingUser);
+  std::string security_origin;
+
+  int ipc_request_id1 = dispatcher->next_ipc_id_;
+  dispatcher->GenerateStream(kRequestId1, handler.get(), components,
+                             security_origin);
+  int ipc_request_id2 = dispatcher->next_ipc_id_;
+  EXPECT_NE(ipc_request_id1, ipc_request_id2);
+  dispatcher->GenerateStream(kRequestId2, handler.get(), components,
+                             security_origin);
+  EXPECT_EQ(dispatcher->requests_.size(), size_t(2));
+
+  media_stream::StreamDeviceInfoArray audio_device_array(1);
+  media_stream::StreamDeviceInfo audio_device_info;
+  audio_device_info.name = "Microphone";
+  audio_device_info.stream_type = media_stream::kAudioCapture;
+  audio_device_info.session_id = kAudioSessionId;
+  audio_device_array[0] = audio_device_info;
+
+  media_stream::StreamDeviceInfoArray video_device_array(1);
+  media_stream::StreamDeviceInfo video_device_info;
+  video_device_info.name = "Camera";
+  video_device_info.stream_type = media_stream::kVideoCapture;
+  video_device_info.session_id = kVideoSessionId;
+  video_device_array[0] = video_device_info;
+
+  // Complete the creation of stream1.
+  std::string stream_label1 = std::string("stream1");
+  dispatcher->OnMessageReceived(MediaStreamMsg_StreamGenerated(
+      kRouteId, ipc_request_id1, stream_label1,
+      audio_device_array, video_device_array));
+  EXPECT_EQ(handler->request_id_, kRequestId1);
+  EXPECT_EQ(handler->label_, stream_label1);
+
+  // Complete the creation of stream2.
+  std::string stream_label2 = std::string("stream2");
+  dispatcher->OnMessageReceived(MediaStreamMsg_StreamGenerated(
+        kRouteId, ipc_request_id2, stream_label2,
+        audio_device_array, video_device_array));
+  EXPECT_EQ(handler->request_id_, kRequestId2);
+  EXPECT_EQ(handler->label_, stream_label2);
+
+  EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
+  EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(2));
+
+  // Check the session_id of stream2.
+  EXPECT_EQ(dispatcher->audio_session_id(stream_label2, 0), kAudioSessionId);
+  EXPECT_EQ(dispatcher->video_session_id(stream_label2, 0), kVideoSessionId);
+
+  // Stop stream2.
+  dispatcher->StopStream(stream_label2);
+  EXPECT_EQ(dispatcher->audio_session_id(stream_label2, 0),
+            media_stream::StreamDeviceInfo::kNoId);
+  EXPECT_EQ(dispatcher->video_session_id(stream_label2, 0),
+            media_stream::StreamDeviceInfo::kNoId);
+
+  // Stop stream1.
+  dispatcher->StopStream(stream_label1);
+  EXPECT_EQ(dispatcher->audio_session_id(stream_label1, 0),
+            media_stream::StreamDeviceInfo::kNoId);
+  EXPECT_EQ(dispatcher->video_session_id(stream_label1, 0),
+            media_stream::StreamDeviceInfo::kNoId);
+  EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
+
+  // Verify that the request have been completed.
+  EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
+  EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
+}
+
+TEST(MediaStreamDispatcherTest, TestFailure) {
+  scoped_ptr<MediaStreamDispatcher> dispatcher(new MediaStreamDispatcher(NULL));
+  scoped_ptr<MockMediaStreamDispatcherEventHandler>
+      handler(new MockMediaStreamDispatcherEventHandler);
+  media_stream::StreamOptions components(
+      true, media_stream::StreamOptions::kFacingUser);
+  std::string security_origin;
+
+  // Test failure when creating a stream.
+  int ipc_request_id1 = dispatcher->next_ipc_id_;
+  dispatcher->GenerateStream(kRequestId1, handler.get(), components,
+                             security_origin);
+  dispatcher->OnMessageReceived(MediaStreamMsg_StreamGenerationFailed(
+      kRouteId, ipc_request_id1));
+
+  // Verify that the request have been completed.
+  EXPECT_EQ(handler->request_id_, kRequestId1);
+  EXPECT_EQ(dispatcher->requests_.size(), size_t(0));
+
+  // Create a new stream.
+  ipc_request_id1 = dispatcher->next_ipc_id_;
+  dispatcher->GenerateStream(kRequestId1, handler.get(), components,
+                             security_origin);
+
+  media_stream::StreamDeviceInfoArray audio_device_array(1);
+  media_stream::StreamDeviceInfo audio_device_info;
+  audio_device_info.name = "Microphone";
+  audio_device_info.stream_type = media_stream::kAudioCapture;
+  audio_device_info.session_id = kAudioSessionId;
+  audio_device_array[0] = audio_device_info;
+
+  media_stream::StreamDeviceInfoArray video_device_array(1);
+  media_stream::StreamDeviceInfo video_device_info;
+  video_device_info.name = "Camera";
+  video_device_info.stream_type = media_stream::kVideoCapture;
+  video_device_info.session_id = kVideoSessionId;
+  video_device_array[0] = video_device_info;
+
+  // Complete the creation of stream1.
+  std::string stream_label1 = std::string("stream1");
+  dispatcher->OnMessageReceived(MediaStreamMsg_StreamGenerated(
+      kRouteId, ipc_request_id1, stream_label1,
+      audio_device_array, video_device_array));
+  EXPECT_EQ(handler->request_id_, kRequestId1);
+  EXPECT_EQ(handler->label_, stream_label1);
+  EXPECT_EQ(dispatcher->video_session_id(stream_label1, 0), kVideoSessionId);
+
+  // Test failure of the video device.
+  dispatcher->OnMessageReceived(
+      MediaStreamHostMsg_VideoDeviceFailed(kRouteId, stream_label1, 0));
+  EXPECT_EQ(handler->video_failed, true);
+  EXPECT_EQ(handler->audio_failed, false);
+  // Make sure the audio device still exist but not the video device.
+  EXPECT_EQ(dispatcher->audio_session_id(stream_label1, 0), kAudioSessionId);
+
+  // Test failure of the audio device.
+  dispatcher->OnMessageReceived(
+      MediaStreamHostMsg_AudioDeviceFailed(kRouteId, stream_label1, 0));
+  EXPECT_EQ(handler->audio_failed, true);
+
+  // Stop stream1.
+  dispatcher->StopStream(stream_label1);
+  EXPECT_EQ(dispatcher->label_stream_map_.size(), size_t(0));
+}