Add Pepper VideoReader and VideoWriter plumbing

ppapi/proxy/video_destination_resource.cc

+// Copyright (c) 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 "ppapi/proxy/video_destination_resource.h"
+
+#include "base/bind.h"
+#include "ipc/ipc_message.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/pp_video_frame_private.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
+#include "ppapi/shared_impl/resource_tracker.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_image_data_api.h"
+
+using ppapi::thunk::EnterResourceNoLock;
+using ppapi::thunk::PPB_VideoDestination_Private_API;
+
+namespace ppapi {
+namespace proxy {
+
+VideoDestinationResource::VideoDestinationResource(
+    Connection connection,
+    PP_Instance instance)
+    : PluginResource(connection, instance),
+      is_open_(false) {
+  SendCreate(RENDERER, PpapiHostMsg_VideoDestination_Create());
+}
+
+VideoDestinationResource::~VideoDestinationResource() {
+}
+
+PPB_VideoDestination_Private_API*
+    VideoDestinationResource::AsPPB_VideoDestination_Private_API() {
+  return this;
+}
+
+int32_t VideoDestinationResource::Open(
+    const PP_Var& stream_url,
+    scoped_refptr<TrackedCallback> callback) {
+  if (TrackedCallback::IsPending(open_callback_))
+    return PP_ERROR_INPROGRESS;
+
+  open_callback_ = callback;
+
+  scoped_refptr<StringVar> stream_url_var = StringVar::FromPPVar(stream_url);
+  const uint32_t kMaxStreamIdSizeInBytes = 16384;
+  if (!stream_url_var ||
+      stream_url_var->value().size() > kMaxStreamIdSizeInBytes)
+    return PP_ERROR_BADARGUMENT;
+  Call<PpapiPluginMsg_VideoDestination_OpenReply>(RENDERER,
+      PpapiHostMsg_VideoDestination_Open(stream_url_var->value()),
+      base::Bind(&VideoDestinationResource::OnPluginMsgOpenComplete, this));
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t VideoDestinationResource::PutFrame(
+    const PP_VideoFrame_Private& frame) {
+  if (!is_open_)
+    return PP_ERROR_FAILED;
+
+  thunk::EnterResourceNoLock<thunk::PPB_ImageData_API> enter_image(
+      frame.image_data, true);
+  if (enter_image.failed())
+    return PP_ERROR_BADRESOURCE;
+
+  // Check that the PP_Instance matches.
+  Resource* image_object =
+      PpapiGlobals::Get()->GetResourceTracker()->GetResource(frame.image_data);
+  if (!image_object || pp_instance() != image_object->pp_instance()) {
+    Log(PP_LOGLEVEL_ERROR,
+        "VideoDestinationPrivateResource.PutFrame: Bad image resource.");
+    return PP_ERROR_BADRESOURCE;
+  }
+
+  Post(RENDERER,
+       PpapiHostMsg_VideoDestination_PutFrame(image_object->host_resource(),
+                                              frame.timestamp));
+  return PP_OK;
+}
+
+void VideoDestinationResource::Close() {
+  Post(RENDERER, PpapiHostMsg_VideoDestination_Close());
+
+  if (TrackedCallback::IsPending(open_callback_))
+    open_callback_->PostAbort();
+}
+
+void VideoDestinationResource::OnPluginMsgOpenComplete(
+    const ResourceMessageReplyParams& params) {
+  is_open_ = true;

[yzshen1, 2013/05/02 22:03:05]

Maybe we set is_open_ to true only if open is successful?

[bbudge, 2013/05/02 23:12:19]

Done.

+  if (TrackedCallback::IsPending(open_callback_))
+    open_callback_->Run(params.result());
+}
+
+}  // namespace proxy
+}  // namespace ppapi