Implement host side of sync EnumerateVideoCaptureDevices

This implements the host side of the sync ppapi function EnumerateVideoCaptureDevices. 


BUG=none
TEST=Wrote a sample that runs the sync and non-sync versions. Ran it and compared the outputs.

Review URL: https://chromiumcodereview.appspot.com/11016007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@162048 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 140 insertions, 0 deletions

diff --git a/content/renderer/pepper/content_renderer_pepper_host_factory.cc b/content/renderer/pepper/content_renderer_pepper_host_factory.cc
index 6d77832..732db9f 100644
--- a/content/renderer/pepper/content_renderer_pepper_host_factory.cc
+++ b/content/renderer/pepper/content_renderer_pepper_host_factory.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "content/renderer/pepper/pepper_file_chooser_host.h"
+#include "content/renderer/pepper/pepper_flash_host.h"
 #include "content/renderer/pepper/pepper_websocket_host.h"
 #include "content/renderer/pepper/renderer_ppapi_host_impl.h"
 #include "ppapi/host/resource_host.h"
@@ -55,6 +56,16 @@ scoped_ptr<ResourceHost> ContentRendererPepperHostFactory::CreateResourceHost(
             host_, instance, params.pp_resource()));
     }
   }
+
+  // Resources for Flash interfaces.
+  if (GetPermissions().HasPermission(ppapi::PERMISSION_FLASH)) {
+    switch (message.type()) {
+      case PpapiHostMsg_Flash_Create::ID:
+        return scoped_ptr<ResourceHost>(new PepperFlashHost(
+            host_, instance, params.pp_resource()));
+    }
+  }
+
   return scoped_ptr<ResourceHost>();
 }
 
diff --git a/content/renderer/pepper/pepper_flash_host.cc b/content/renderer/pepper/pepper_flash_host.cc
new file mode 100644
index 0000000..d2e9f6f
--- /dev/null
+++ b/content/renderer/pepper/pepper_flash_host.cc
@@ -0,0 +1,82 @@
+// 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/pepper_flash_host.h"
+
+#include <vector>
+
+#include "content/public/renderer/renderer_ppapi_host.h"
+#include "ipc/ipc_message_macros.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/host/dispatch_host_message.h"
+#include "ppapi/host/ppapi_host.h"
+#include "ppapi/proxy/enter_proxy.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/resource_message_params.h"
+#include "ppapi/thunk/ppb_video_capture_api.h"
+
+using ppapi::proxy::EnterHostFromHostResource;
+using ppapi::proxy::EnterHostFromHostResourceForceCallback;
+using ppapi::thunk::PPB_VideoCapture_API;
+
+namespace content {
+
+PepperFlashHost::PepperFlashHost(
+    RendererPpapiHost* host,
+    PP_Instance instance,
+    PP_Resource resource)
+    : ResourceHost(host->GetPpapiHost(), instance, resource),
+      callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
+}
+
+PepperFlashHost::~PepperFlashHost() {
+}
+
+int32_t PepperFlashHost::OnResourceMessageReceived(
+    const IPC::Message& msg,
+    ppapi::host::HostMessageContext* context) {
+  IPC_BEGIN_MESSAGE_MAP(PepperFlashHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_Flash_EnumerateVideoCaptureDevices,
+        OnMsgEnumerateVideoCaptureDevices)
+  IPC_END_MESSAGE_MAP()
+  return PP_ERROR_FAILED;
+}
+
+int32_t PepperFlashHost::OnMsgEnumerateVideoCaptureDevices(
+    ppapi::host::HostMessageContext* host_context,
+    const ppapi::HostResource& host_resource) {
+  EnterHostFromHostResourceForceCallback<PPB_VideoCapture_API> enter(
+      host_resource, callback_factory_,
+      &PepperFlashHost::OnEnumerateVideoCaptureDevicesComplete,
+      host_context->MakeReplyMessageContext(),
+      host_resource);
+  if (enter.succeeded()) {
+    // We don't want the output to go into a PP_ResourceArray (which is
+    // deprecated), so just pass in NULL. We'll grab the DeviceRefData vector
+    // in the callback and convert it to a PP_ArrayOutput in the plugin.
+    enter.SetResult(enter.object()->EnumerateDevices(NULL, enter.callback()));
+  }
+  return PP_OK_COMPLETIONPENDING;
+}
+
+void PepperFlashHost::OnEnumerateVideoCaptureDevicesComplete(
+    int32_t result,
+    ppapi::host::ReplyMessageContext reply_message_context,
+    const ppapi::HostResource& host_resource) {
+  std::vector<ppapi::DeviceRefData> devices;
+  if (result == PP_OK) {
+    EnterHostFromHostResource<PPB_VideoCapture_API> enter(host_resource);
+    if (enter.succeeded())
+      devices = enter.object()->GetDeviceRefData();
+    else
+      result = PP_ERROR_FAILED;
+  }
+  reply_message_context.params.set_result(result);
+  host()->SendReply(reply_message_context,
+      PpapiPluginMsg_Flash_EnumerateVideoCaptureDevicesReply(devices));
+}
+
+}  // namespace content
+
diff --git a/content/renderer/pepper/pepper_flash_host.h b/content/renderer/pepper/pepper_flash_host.h
new file mode 100644
index 0000000..5073bc8
--- /dev/null
+++ b/content/renderer/pepper/pepper_flash_host.h
@@ -0,0 +1,47 @@
+// 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.
+
+#ifndef CONTENT_RENDERER_PEPPER_PEPPER_FLASH_HOST_H_
+#define CONTENT_RENDERER_PEPPER_PEPPER_FLASH_HOST_H_
+
+#include "base/basictypes.h"
+#include "ipc/ipc_message.h"
+#include "ppapi/host/host_message_context.h"
+#include "ppapi/host/resource_host.h"
+#include "ppapi/proxy/proxy_completion_callback_factory.h"
+
+namespace content {
+
+class RendererPpapiHost;
+
+class PepperFlashHost
+    : public ppapi::host::ResourceHost {
+ public:
+  PepperFlashHost(RendererPpapiHost* host,
+                  PP_Instance instance,
+                  PP_Resource resource);
+  virtual ~PepperFlashHost();
+
+  virtual int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) OVERRIDE;
+
+  int32_t OnMsgEnumerateVideoCaptureDevices(
+      ppapi::host::HostMessageContext* host_context,
+      const ppapi::HostResource& host_resource);
+ private:
+  void OnEnumerateVideoCaptureDevicesComplete(
+      int32_t result,
+      ppapi::host::ReplyMessageContext reply_message_context,
+      const ppapi::HostResource& host_resource);
+
+  ppapi::proxy::ProxyCompletionCallbackFactory<PepperFlashHost>
+      callback_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperFlashHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_PEPPER_PEPPER_FLASH_HOST_H_