media: Add MediaInterfaceProxy

content/browser/media/media_interface_proxy.cc

+// Copyright 2016 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/browser/media/media_interface_proxy.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "content/public/browser/content_browser_client.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/common/content_client.h"
+#include "content/public/common/service_manager_connection.h"
+#include "media/mojo/interfaces/media_service.mojom.h"
+#include "services/service_manager/public/cpp/connector.h"
+
+#if defined(ENABLE_MOJO_CDM)
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/provision_fetcher_impl.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/storage_partition.h"
+#include "net/url_request/url_request_context_getter.h"
+#endif
+
+namespace content {
+
+MediaInterfaceProxy::MediaInterfaceProxy(
+    RenderFrameHost* render_frame_host,
+    media::mojom::InterfaceFactoryRequest request,
+    const base::Closure& error_handler)
+    : render_frame_host_(render_frame_host),
+      binding_(this, std::move(request)) {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(render_frame_host_);
+  DCHECK(!error_handler.is_null());
+
+  binding_.set_connection_error_handler(error_handler);
+
+  // |interface_factory_ptr_| will be lazily connected in
+  // GetMediaInterfaceFactory().
+}
+
+MediaInterfaceProxy::~MediaInterfaceProxy() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+void MediaInterfaceProxy::CreateAudioDecoder(
+    media::mojom::AudioDecoderRequest request) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  GetMediaInterfaceFactory()->CreateAudioDecoder(std::move(request));
+}
+
+void MediaInterfaceProxy::CreateVideoDecoder(
+    media::mojom::VideoDecoderRequest request) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  GetMediaInterfaceFactory()->CreateVideoDecoder(std::move(request));
+}
+
+void MediaInterfaceProxy::CreateRenderer(
+    const std::string& audio_device_id,
+    media::mojom::RendererRequest request) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  GetMediaInterfaceFactory()->CreateRenderer(audio_device_id,
+                                             std::move(request));
+}
+
+void MediaInterfaceProxy::CreateCdm(
+    media::mojom::ContentDecryptionModuleRequest request) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  GetMediaInterfaceFactory()->CreateCdm(std::move(request));
+}
+
+media::mojom::InterfaceFactory*
+MediaInterfaceProxy::GetMediaInterfaceFactory() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  if (!interface_factory_ptr_)
+    ConnectToService();
+
+  DCHECK(interface_factory_ptr_);
+
+  return interface_factory_ptr_.get();
+}
+
+void MediaInterfaceProxy::OnConnectionError() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  interface_factory_ptr_.reset();
+}
+
+void MediaInterfaceProxy::ConnectToService() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!interface_factory_ptr_);
+
+  // Register frame services.
+  auto registry =
+      base::MakeUnique<service_manager::InterfaceRegistry>(std::string());
+#if defined(ENABLE_MOJO_CDM)
+  // TODO(slan): Wrap these into a RenderFrame specific ProvisionFetcher impl.
+  net::URLRequestContextGetter* context_getter =
+      BrowserContext::GetDefaultStoragePartition(
+          render_frame_host_->GetProcess()->GetBrowserContext())
+          ->GetURLRequestContext();
+  registry->AddInterface(
+      base::Bind(&ProvisionFetcherImpl::Create, context_getter));
+#endif  // defined(ENABLE_MOJO_CDM)
+  GetContentClient()->browser()->ExposeInterfacesToMediaService(
+      registry.get(), render_frame_host_);
+
+  // Get frame service InterfaceProvider.
+  // TODO(xhwang): Replace this InterfaceProvider with a dedicated media host
+  // interface. See http://crbug.com/660573
+  service_manager::mojom::InterfaceProviderPtr interfaces;
+  registry->Bind(GetProxy(&interfaces), service_manager::Identity(),
+                 service_manager::InterfaceProviderSpec(),
+                 service_manager::Identity(),
+                 service_manager::InterfaceProviderSpec());
+  media_registries_.push_back(std::move(registry));
+
+  // TODO(slan): Use the BrowserContext Connector instead. See crbug.com/638950.
+  media::mojom::MediaServicePtr media_service;
+  service_manager::Connector* connector =
+      ServiceManagerConnection::GetForProcess()->GetConnector();
+  connector->ConnectToInterface("media", &media_service);
+  media_service->CreateInterfaceFactory(GetProxy(&interface_factory_ptr_),
+                                        std::move(interfaces));
+  interface_factory_ptr_.set_connection_error_handler(base::Bind(
+      &MediaInterfaceProxy::OnConnectionError, base::Unretained(this)));
+}
+
+}  // namespace content