Expose flash playback status and volume control to content renderer

content/renderer/pepper/ppb_audio_impl.cc

 // 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/pepper/ppb_audio_impl.h"
 
 #include "base/logging.h"
 #include "content/renderer/pepper/pepper_platform_audio_output.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/pepper/plugin_instance_throttler_impl.h"
 #include "content/renderer/render_frame_impl.h"
-#include "content/renderer/render_view_impl.h"
 #include "media/audio/audio_output_controller.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/ppb_audio.h"
 #include "ppapi/c/ppb_audio_config.h"
 #include "ppapi/shared_impl/resource_tracker.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_audio_config_api.h"
 #include "ppapi/thunk/thunk.h"
 
 using ppapi::PpapiGlobals;
 using ppapi::thunk::EnterResourceNoLock;
 using ppapi::thunk::PPB_Audio_API;
 using ppapi::thunk::PPB_AudioConfig_API;
 using ppapi::TrackedCallback;
 
 namespace content {
 
 // PPB_Audio_Impl --------------------------------------------------------------
 
 PPB_Audio_Impl::PPB_Audio_Impl(PP_Instance instance)
     : Resource(ppapi::OBJECT_IS_IMPL, instance),
       audio_(NULL),
       playback_throttled_(false) {
   PepperPluginInstanceImpl* plugin_instance =
       static_cast<PepperPluginInstanceImpl*>(
           PepperPluginInstance::Get(pp_instance()));
   if (plugin_instance && plugin_instance->throttler()) {
     plugin_instance->throttler()->AddObserver(this);
   }
+  static int32_t pepper_audio_id = 0;
+  pepper_audio_id_ = pepper_audio_id++;
 }
 
 PPB_Audio_Impl::~PPB_Audio_Impl() {
   PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
       PepperPluginInstance::Get(pp_instance()));
   if (instance && instance->throttler()) {
     instance->throttler()->RemoveObserver(this);
   }
 
   // Calling ShutDown() makes sure StreamCreated cannot be called anymore and
@@ skipping 24 matching lines @@
   // If plugin is in power saver mode, defer audio IPC communication.
   PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
       PepperPluginInstance::Get(pp_instance()));
   if (instance && instance->throttler() &&
       instance->throttler()->power_saver_enabled()) {
     instance->throttler()->NotifyAudioThrottled();
     playback_throttled_ = true;
     return PP_TRUE;
   }
 
+  RenderFrameImpl* render_frame = instance->render_frame();
+  if (render_frame)
+    render_frame->PepperStartsPlayback(instance, this);
+
   SetStartPlaybackState();
   return PP_FromBool(audio_->StartPlayback());
 }
 
 PP_Bool PPB_Audio_Impl::StopPlayback() {
   if (!audio_)
     return PP_FALSE;
 
   if (playback_throttled_) {
     // If a start playback request is still deferred, we must fulfill it first
     // to shut down the audio thread correctly.
     StartDeferredPlayback();
   }
 
+  PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
+      PepperPluginInstance::Get(pp_instance()));

[bbudge, 2016/06/13 17:51:01]

Check for null instance, or add a CHECK or DCHECK if instance cannot be null.

[Zhiqiang Zhang (Slow), 2016/06/14 14:15:26]

Done.

+  RenderFrameImpl* render_frame = instance->render_frame();
+  if (render_frame)
+    render_frame->PepperStopsPlayback(instance, this);
+
   if (!playing())
     return PP_TRUE;
   if (!audio_->StopPlayback())
     return PP_FALSE;
   SetStopPlaybackState();
 
   return PP_TRUE;
 }
 
 int32_t PPB_Audio_Impl::Open(PP_Resource config,
@@ skipping 56 matching lines @@
       !instance->throttler()->power_saver_enabled()) {
     // If we have become unthrottled, and we have a pending playback, start it.
     StartDeferredPlayback();
   }
 }
 
 void PPB_Audio_Impl::StartDeferredPlayback() {
   DCHECK(playback_throttled_);
   playback_throttled_ = false;
 
+  PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
+      PepperPluginInstance::Get(pp_instance()));

[bbudge, 2016/06/13 17:51:01]

Ditto.

[Zhiqiang Zhang (Slow), 2016/06/14 14:15:25]

Done.

+  RenderFrameImpl* render_frame = instance->render_frame();
+  if (render_frame)
+    render_frame->PepperStartsPlayback(instance, this);
+
   SetStartPlaybackState();
   audio_->StartPlayback();
 }
 
+void PPB_Audio_Impl::SetVolume(double volume) {
+  audio_->SetVolume(volume);
+}
 }  // namespace content