Implement PPAPI VideoDecode out-of-process support

ppapi/proxy/ppb_video_decoder_proxy.h

+// Copyright (c) 2011 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 PPAPI_PROXY_PPB_VIDEO_DECODER_PROXY_H_
+#define PPAPI_PROXY_PPB_VIDEO_DECODER_PROXY_H_
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
+#include "ppapi/shared_impl/video_decoder_impl.h"
+#include "ppapi/thunk/ppb_video_decoder_api.h"
+
+namespace pp {
+namespace proxy {
+
+class VideoDecoder : public PluginResource,
+                     public ::ppapi::VideoDecoderImpl {
+ public:
+  virtual ~VideoDecoder();
+
+  static VideoDecoder* Create(const HostResource& resource,
+                              PP_Resource context3d_id,
+                              const PP_VideoConfigElement* config);
+
+  // ResourceObjectBase overrides.
+  virtual PPB_VideoDecoder_API* AsPPB_VideoDecoder_API() OVERRIDE;
+
+  // PPB_VideoDecoder_API implementation.
+  virtual int32_t Decode(const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
+                         PP_CompletionCallback callback) OVERRIDE;
+  virtual void AssignPictureBuffers(
+      uint32_t no_of_buffers, const PP_PictureBuffer_Dev* buffers) OVERRIDE;
+  virtual void ReusePictureBuffer(int32_t picture_buffer_id) OVERRIDE;
+  virtual int32_t Flush(PP_CompletionCallback callback) OVERRIDE;
+  virtual int32_t Reset(PP_CompletionCallback callback) OVERRIDE;
+  virtual void Destroy() OVERRIDE;
+
+  void FlushACK();

[Ami GONE FROM CHROMIUM, 2011/08/02 00:49:08]

Does proxy stuff not believe in "friend"ship?
(i.e. are these only public so that PPB_VD_P can see them?  if so does making it
a friend help?)

[vrk (LEFT CHROMIUM), 2011/08/03 19:04:30]

Yes.
Yes!
I don't know! Since I don't know of any rule against this, I have made
PPB_VideoDecoder_Proxy a friend of VideoDecoder and made these methods private.

+  void ResetACK();
+  void EndOfBitstreamACK(int32_t buffer_id);
+
+  virtual bool Init(

[Ami GONE FROM CHROMIUM, 2011/08/02 00:49:08]

s/public/protected/

[vrk (LEFT CHROMIUM), 2011/08/03 19:04:30]

n/a removed the overrided method.

+      PP_Resource context_id, const PP_VideoConfigElement* decoder_config);
+
+ private:
+  explicit VideoDecoder(const HostResource& resource);
+  DISALLOW_COPY_AND_ASSIGN(VideoDecoder);
+};
+
+class PPB_VideoDecoder_Proxy : public InterfaceProxy {

[Ami GONE FROM CHROMIUM, 2011/08/02 00:49:08]

None of the other .h files in this dir declare two classes.  Do you have an
opinion on unifying these two vs. not?

[vrk (LEFT CHROMIUM), 2011/08/03 19:04:30]

Talked in person. Not unified but class def moved to .cc file.

+ public:
+  PPB_VideoDecoder_Proxy(Dispatcher* dispatcher, const void* target_interface);
+  virtual ~PPB_VideoDecoder_Proxy();
+
+  static const Info* GetInfo();
+
+  // Creates a VideoDecoder object in the plugin process.
+  static PP_Resource CreateProxyResource(PP_Instance instance,
+    PP_Resource context3d_id, const PP_VideoConfigElement* config);
+
+  // InterfaceProxy implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg);
+
+ private:
+  // Message handlers in the renderer process to receive messages from the
+  // plugin process.
+  void OnMsgCreate(PP_Instance instance, const HostResource& context3d_id,
+                   const std::vector<int32_t>& config, HostResource* result);
+  void OnMsgDecode(
+      const HostResource& decoder,
+      const HostResource& buffer, int32 id, int32 size);
+  void OnMsgAssignPictureBuffers(
+      const HostResource& decoder,
+      const std::vector<PP_PictureBuffer_Dev>& buffers);
+  void OnMsgReusePictureBuffer(
+      const HostResource& decoder,
+      int32 picture_buffer_id);
+  void OnMsgFlush(const HostResource& decoder);
+  void OnMsgReset(const HostResource& decoder);
+  void OnMsgDestroy(const HostResource& decoder);
+
+  void SendMsgEndOfBitstreamACKToPlugin(
+      int32_t result, const HostResource& decoder, int32 id);
+  void SendMsgFlushACKToPlugin(
+      int32_t result, const HostResource& decoder);
+  void SendMsgResetACKToPlugin(
+      int32_t result, const HostResource& decoder);
+
+  // Message handlers in the plugin process to receive messages from the
+  // renderer process.
+  void OnMsgEndOfBitstreamACK(const HostResource& decoder, int32_t pp_error);
+  void OnMsgFlushACK(const HostResource& decoder, int32_t pp_error);
+  void OnMsgResetACK(const HostResource& decoder, int32_t pp_error);
+
+  CompletionCallbackFactory<PPB_VideoDecoder_Proxy,
+                            ProxyNonThreadSafeRefCount> callback_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PPB_VideoDecoder_Proxy);
+};
+
+}  // namespace proxy
+}  // namespace pp
+
+#endif  // PPAPI_PROXY_PPB_VIDEO_DECODER_PROXY_H_