MediaStreamDispatcher

content/renderer/media/media_stream_dispatcher.cc

+// 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 "content/renderer/media/media_stream_dispatcher.h"
+
+#include "base/logging.h"
+#include "content/common/media/media_stream_messages.h"
+#include "content/renderer/media/media_stream_dispatcher_eventhandler.h"
+
+MediaStreamDispatcherEventHandler::~MediaStreamDispatcherEventHandler() {}
+
+MediaStreamDispatcher::MediaStreamDispatcher(RenderView* render_view)
+    : RenderViewObserver(render_view),
+      next_ipc_id_(0),
+      message_loop_(MessageLoop::current()) {
+}
+
+MediaStreamDispatcher::~MediaStreamDispatcher() {}
+
+void MediaStreamDispatcher::GenerateStream(
+    int request_id,
+    MediaStreamDispatcherEventHandler* event_handler,
+    media_stream::StreamOptions components,
+    const std::string& security_origin) {
+  DCHECK_EQ(MessageLoop::current(), message_loop_);
+  VLOG(1) << "MediaStreamDispatcher::GenerateStream(" << request_id << ")";
+
+  requests_.push_back(Request(event_handler, request_id, next_ipc_id_));
+  Send(new MediaStreamHostMsg_GenerateStream(routing_id(),
+                                             next_ipc_id_++,
+                                             components,
+                                             security_origin));
+}
+
+void MediaStreamDispatcher::StopStream(const std::string& label) {
+  DCHECK_EQ(MessageLoop::current(), message_loop_);
+  VLOG(1) << "MediaStreamDispatcher::StopStream"
+          << ", {label = " << label << "}";
+
+  LabelStreamMap::iterator it = label_stream_map_.find(label);
+  if (it == label_stream_map_.end())
+    return;
+
+  Send(new MediaStreamHostMsg_StopGeneratedStream(routing_id(), label));
+  label_stream_map_.erase(it);
+}
+
+bool MediaStreamDispatcher::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(MediaStreamDispatcher, message)
+    IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerated,
+                        OnStreamGenerated)
+    IPC_MESSAGE_HANDLER(MediaStreamMsg_StreamGenerationFailed,
+                        OnStreamGenerationFailed)
+    IPC_MESSAGE_HANDLER(MediaStreamHostMsg_VideoDeviceFailed,
+                        OnVideoDeviceFailed)
+    IPC_MESSAGE_HANDLER(MediaStreamHostMsg_AudioDeviceFailed,
+                        OnAudioDeviceFailed)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void MediaStreamDispatcher::OnStreamGenerated(
+    int request_id,
+    const std::string& label,
+    const media_stream::StreamDeviceInfoArray& audio_array,
+    const media_stream::StreamDeviceInfoArray& video_array) {
+
+  for (RequestList::iterator it = requests_.begin();
+       it != requests_.end(); ++it) {
+    Request& request = *it;
+    if (request.ipc_request == request_id) {
+      Stream new_stream;
+      new_stream.handler = request.handler;
+      new_stream.audio_array = audio_array;
+      new_stream.video_array = video_array;
+      label_stream_map_[label] = new_stream;
+      request.handler->OnStreamGenerated(request.request_id, label,
+                                         audio_array, video_array);
+      VLOG(1) << "MediaStreamDispatcher::OnStreamGenerated("
+              << request.request_id << ", " << label << ")";
+      requests_.erase(it);
+      break;
+    }
+  }
+}
+
+void MediaStreamDispatcher::OnStreamGenerationFailed(int request_id) {
+  for (RequestList::iterator it = requests_.begin();
+       it != requests_.end(); ++it) {
+    Request& request = *it;
+    if (request.ipc_request == request_id) {
+      request.handler->OnStreamGenerationFailed(request.request_id);
+      VLOG(1) << "MediaStreamDispatcher::OnStreamGenerationFailed("
+              << request.request_id << ")\n";
+      requests_.erase(it);
+      break;
+    }
+  }
+}
+
+void MediaStreamDispatcher::OnVideoDeviceFailed(const std::string& label,
+                                                int index) {
+  LabelStreamMap::iterator it = label_stream_map_.find(label);
+  if (it == label_stream_map_.end())
+    return;
+
+  // index is the index in the video_array that has failed.
+  DCHECK_GT(it->second.video_array.size(), static_cast<size_t>(index));
+  media_stream::StreamDeviceInfoArray::iterator device_it =
+      it->second.video_array.begin();
+  it->second.video_array.erase(device_it + index);
+  it->second.handler->OnVideoDeviceFailed(label, index);
+}
+
+void MediaStreamDispatcher::OnAudioDeviceFailed(const std::string& label,
+                                                int index) {
+  LabelStreamMap::iterator it = label_stream_map_.find(label);
+  if (it == label_stream_map_.end())
+    return;
+
+  // index is the index in the audio_array that has failed.
+  DCHECK_GT(it->second.audio_array.size(), static_cast<size_t>(index));
+  media_stream::StreamDeviceInfoArray::iterator device_it =
+      it->second.audio_array.begin();
+  it->second.audio_array.erase(device_it + index);
+  it->second.handler->OnAudioDeviceFailed(label, index);
+}
+
+int MediaStreamDispatcher::audio_session_id(const std::string& label,
+                                            int index) {
+  LabelStreamMap::iterator it = label_stream_map_.find(label);
+  if (it == label_stream_map_.end())
+    return media_stream::StreamDeviceInfo::kNoId;
+
+  DCHECK_GT(it->second.audio_array.size(), static_cast<size_t>(index));
+  return it->second.audio_array[index].session_id;
+}
+
+bool MediaStreamDispatcher::IsStream(const std::string& label) {
+  return label_stream_map_.find(label) != label_stream_map_.end();
+}
+
+int MediaStreamDispatcher::video_session_id(const std::string& label,
+                                            int index) {
+  LabelStreamMap::iterator it = label_stream_map_.find(label);
+  if (it == label_stream_map_.end())
+    return media_stream::StreamDeviceInfo::kNoId;
+
+  DCHECK_GT(it->second.video_array.size(), static_cast<size_t>(index));
+  return it->second.video_array[index].session_id;
+}