Expose flash playback status and volume control to content renderer

content/renderer/render_frame_impl.cc

 // Copyright 2013 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/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 98 matching lines @@
 #include "content/renderer/media/render_media_log.h"
 #include "content/renderer/media/renderer_webmediaplayer_delegate.h"
 #include "content/renderer/media/user_media_client_impl.h"
 #include "content/renderer/media/web_media_element_source_utils.h"
 #include "content/renderer/media/webmediaplayer_ms.h"
 #include "content/renderer/mojo/service_registry_js_wrapper.h"
 #include "content/renderer/mojo_bindings_controller.h"
 #include "content/renderer/navigation_state_impl.h"
 #include "content/renderer/notification_permission_dispatcher.h"
 #include "content/renderer/pepper/plugin_instance_throttler_impl.h"
+#include "content/renderer/pepper/ppb_audio_impl.h"
 #include "content/renderer/presentation/presentation_dispatcher.h"
 #include "content/renderer/push_messaging/push_messaging_dispatcher.h"
 #include "content/renderer/render_frame_proxy.h"
 #include "content/renderer/render_process.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/render_widget_fullscreen_pepper.h"
 #include "content/renderer/renderer_webapplicationcachehost_impl.h"
 #include "content/renderer/renderer_webcolorchooser_impl.h"
 #include "content/renderer/savable_resources.h"
@@ skipping 1347 matching lines @@
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(RenderFrameImpl, msg)
     IPC_MESSAGE_HANDLER(FrameMsg_Navigate, OnNavigate)
     IPC_MESSAGE_HANDLER(FrameMsg_BeforeUnload, OnBeforeUnload)
     IPC_MESSAGE_HANDLER(FrameMsg_SwapOut, OnSwapOut)
     IPC_MESSAGE_HANDLER(FrameMsg_Delete, OnDeleteFrame)
     IPC_MESSAGE_HANDLER(FrameMsg_Stop, OnStop)
     IPC_MESSAGE_HANDLER(FrameMsg_ContextMenuClosed, OnContextMenuClosed)
     IPC_MESSAGE_HANDLER(FrameMsg_CustomContextMenuAction,
                         OnCustomContextMenuAction)
+#if defined(ENABLE_PLUGINS)
+    IPC_MESSAGE_HANDLER(FrameMsg_SetPepperVolume, OnSetPepperVolume)
+#endif  //defined(ENABLE_PLUGINS)
     IPC_MESSAGE_HANDLER(InputMsg_Undo, OnUndo)
     IPC_MESSAGE_HANDLER(InputMsg_Redo, OnRedo)
     IPC_MESSAGE_HANDLER(InputMsg_Cut, OnCut)
     IPC_MESSAGE_HANDLER(InputMsg_Copy, OnCopy)
     IPC_MESSAGE_HANDLER(InputMsg_Paste, OnPaste)
     IPC_MESSAGE_HANDLER(InputMsg_PasteAndMatchStyle, OnPasteAndMatchStyle)
     IPC_MESSAGE_HANDLER(InputMsg_Delete, OnDelete)
     IPC_MESSAGE_HANDLER(InputMsg_SelectAll, OnSelectAll)
     IPC_MESSAGE_HANDLER(InputMsg_SelectRange, OnSelectRange)
     IPC_MESSAGE_HANDLER(InputMsg_AdjustSelectionByCharacterOffset,
@@ skipping 4735 matching lines @@
   if (focused)
     focused_pepper_plugin_ = instance;
   else if (focused_pepper_plugin_ == instance)
     focused_pepper_plugin_ = nullptr;
 
   GetRenderWidget()->UpdateTextInputState(ShowIme::HIDE_IME,
                                           ChangeSource::FROM_NON_IME);
   GetRenderWidget()->UpdateSelectionBounds();
 }
 
+void RenderFrameImpl::PepperStartsPlayback(
+    PepperPluginInstanceImpl* instance, PPB_Audio_Impl* ppb_audio) {
+  // Only send start signal for the first PPB_Audio_Impl starts playback.
+  if (pepper_audios_map_[instance->pp_instance()].empty()) {
+    RenderFrameImpl* const render_frame = instance->render_frame();
+    // TODO(zqzhang): fire PepperStartsPlayback signal to the browser.
+  }
+  // TODO(zqzhang): it is unsure that whether a pepper instance can
+  // have multiple audio instances. Currently let the pepper instance
+  // delegates the SetVolume() method of all it's audio instances.

[no sievers, 2016/06/21 18:58:58]

can you DCHECK() that it does not exist?

[Zhiqiang Zhang (Slow), 2016/06/21 19:32:02]

I think we should not trust Flash, so I added early return here instead of
DCHECK().

+  pepper_audios_map_[instance->pp_instance()].insert(ppb_audio);
+}
+
+void RenderFrameImpl::PepperStopsPlayback(
+    PepperPluginInstanceImpl* instance, PPB_Audio_Impl* ppb_audio) {
+  pepper_audios_map_[instance->pp_instance()].erase(ppb_audio);

[no sievers, 2016/06/21 18:58:58]

can you DCHECK() that it exists?

[Zhiqiang Zhang (Slow), 2016/06/21 19:32:02]

Ditto.

+
+  RenderFrameImpl* const render_frame = instance->render_frame();
+  // Only send stop signal for the last PPB_Audio_Impl stops playback.
+  if (render_frame && pepper_audios_map_[instance->pp_instance()].empty()) {
+    // TODO(zqzhang): fire PepperStopsPlayback signal to the browser.
+  }
+}
+
+void RenderFrameImpl::OnSetPepperVolume(int32_t pp_instance, double volume) {
+  if (pepper_audios_map_.count(pp_instance) == 0) return;
+  for (auto* ppb_audio : pepper_audios_map_[pp_instance]) {
+    ppb_audio->SetVolume(volume);
+  }
+}
 #endif  // ENABLE_PLUGINS
 
 void RenderFrameImpl::RenderWidgetSetFocus(bool enable) {
 #if defined(ENABLE_PLUGINS)
   // Notify all Pepper plugins.
   for (auto* plugin : active_pepper_instances_)
     plugin->SetContentAreaFocus(enable);
 #endif
 }
 
 void RenderFrameImpl::RenderWidgetWillHandleMouseEvent() {
 #if defined(ENABLE_PLUGINS)
   // This method is called for every mouse event that the RenderWidget receives.
   // And then the mouse event is forwarded to blink, which dispatches it to the
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content