media: Support creation and SetCdm() for mojo based CDM.

mojo/services/html_viewer/webmediaplayer_factory.cc

 // Copyright 2014 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 "mojo/services/html_viewer/webmediaplayer_factory.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/threading/thread.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/audio_manager_base.h"
 #include "media/audio/audio_output_stream_sink.h"
 #include "media/base/audio_hardware_config.h"
 #include "media/base/media.h"
 #include "media/base/media_log.h"
 #include "media/blink/webmediaplayer_impl.h"
 #include "media/blink/webmediaplayer_params.h"
 #include "media/cdm/default_cdm_factory.h"
 #include "media/filters/default_renderer_factory.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
+#include "media/mojo/interfaces/content_decryption_module_factory.mojom.h"
 #include "media/mojo/interfaces/media_renderer.mojom.h"
+#include "media/mojo/services/mojo_cdm_factory.h"
 #include "media/mojo/services/mojo_renderer_factory.h"
 #include "mojo/public/cpp/application/connect.h"
 #include "mojo/public/interfaces/application/shell.mojom.h"
 
 using mojo::ServiceProviderPtr;
 
 namespace html_viewer {
 
 #if !defined(OS_ANDROID)
 namespace {
@@ skipping 45 matching lines @@
     blink::WebLocalFrame* frame,
     const blink::WebURL& url,
     blink::WebMediaPlayerClient* client,
     blink::WebContentDecryptionModule* initial_cdm,
     mojo::Shell* shell) {
 #if defined(OS_ANDROID)
   return nullptr;
 #else
   scoped_refptr<media::MediaLog> media_log(new media::MediaLog());
   scoped_ptr<media::RendererFactory> media_renderer_factory;
+  scoped_ptr<media::CdmFactory> cdm_factory;
 
   if (enable_mojo_media_renderer_) {
-    ServiceProviderPtr media_renderer_service_provider;
+    ServiceProviderPtr media_service_provider;
     shell->ConnectToApplication("mojo:media",
-                                GetProxy(&media_renderer_service_provider));
+                                GetProxy(&media_service_provider));
+
+    // TODO(xhwang): Create only one |cdm_factory_ptr| per process.
+    mojo::ContentDecryptionModuleFactoryPtr cdm_factory_ptr;
+    mojo::ConnectToService(media_service_provider.get(), &cdm_factory_ptr);
+    cdm_factory.reset(new media::MojoCdmFactory(cdm_factory_ptr.Pass()));

[xhwang, 2015/01/05 23:52:38]

Background for another CL (https://codereview.chromium.org/835683002/):
HTMLViewer owners perfer to using a run time flag (enable_mojo_media_renderer)
here instead of macros. This is another reason I don't like to have
ENABLE_BROWSER_CDMS here.

+
     media_renderer_factory.reset(new media::MojoRendererFactory(make_scoped_ptr(
-        new RendererServiceProvider(media_renderer_service_provider.Pass()))));
+        new RendererServiceProvider(media_service_provider.Pass()))));
   } else {
     media_renderer_factory.reset(
         new media::DefaultRendererFactory(media_log,
                                           nullptr,  // No GPU factory.
                                           GetAudioHardwareConfig()));
+    cdm_factory.reset(new media::DefaultCdmFactory());
   }
 
   media::WebMediaPlayerParams params(media::WebMediaPlayerParams::DeferLoadCB(),
                                      CreateAudioRendererSink(), media_log,
                                      GetMediaThreadTaskRunner(),
                                      compositor_task_runner_, initial_cdm);
   base::WeakPtr<media::WebMediaPlayerDelegate> delegate;
 
-  scoped_ptr<media::CdmFactory> cdm_factory(new media::DefaultCdmFactory());
-
   return new media::WebMediaPlayerImpl(frame, client, delegate,
                                        media_renderer_factory.Pass(),
                                        cdm_factory.Pass(), params);
 #endif
 }
 
 const media::AudioHardwareConfig&
 WebMediaPlayerFactory::GetAudioHardwareConfig() {
   return audio_hardware_config_;
 }
 
 scoped_refptr<media::AudioRendererSink>
 WebMediaPlayerFactory::CreateAudioRendererSink() {
   // TODO(dalecurtis): Replace this with an interface to an actual mojo service;
   // the AudioOutputStreamSink will not work in sandboxed processes.
   return new media::AudioOutputStreamSink();
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 WebMediaPlayerFactory::GetMediaThreadTaskRunner() {
   if (!media_thread_.IsRunning())
     media_thread_.Start();
 
   return media_thread_.message_loop_proxy();
 }
 
 }  // namespace html_viewer