Support multiple HW video decoders per context.

content/common/gpu/gpu_command_buffer_stub.cc

 // 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.
 
 #if defined(ENABLE_GPU)
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/process_util.h"
 #include "base/shared_memory.h"
@@ skipping 86 matching lines @@
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyVideoDecoder,
                         OnDestroyVideoDecoder)
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_ResizeOffscreenFrameBuffer,
                         OnResizeOffscreenFrameBuffer);
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetWindowSize, OnSetWindowSize);
 #endif  // defined(OS_MACOSX)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
-  // If this message isn't intended for the stub, try to route it to the video
-  // decoder.
-  if (!handled && video_decoder_.get())
-    handled = video_decoder_->OnMessageReceived(message);
-
   DCHECK(handled);
   return handled;
 }
 
 bool GpuCommandBufferStub::Send(IPC::Message* message) {
   return channel_->Send(message);
 }
 
 bool GpuCommandBufferStub::IsScheduled() {
   return !scheduler_.get() || scheduler_->IsScheduled();
@@ skipping 425 matching lines @@
   } else {
     IPC::Message* msg = new GpuCommandBufferMsg_UpdateState(route_id_, state);
     msg->set_unblock(true);
     Send(msg);
   }
 }
 
 void GpuCommandBufferStub::OnCreateVideoDecoder(
     const std::vector<int32>& configs,
     IPC::Message* reply_message) {
-  video_decoder_.reset(
-      new GpuVideoDecodeAccelerator(this, route_id_, this));
-  video_decoder_->Initialize(configs, reply_message);
+  int decoder_route_id = channel_->GenerateRouteID();
+  GpuCommandBufferMsg_CreateVideoDecoder::WriteReplyParams(
+      reply_message, decoder_route_id);
+  GpuVideoDecodeAccelerator* decoder =
+      new GpuVideoDecodeAccelerator(this, decoder_route_id, this);
+  video_decoders_.AddWithID(decoder, decoder_route_id);
+  channel_->AddRoute(decoder_route_id, decoder);
+  decoder->Initialize(configs, reply_message);
 }
 
-void GpuCommandBufferStub::OnDestroyVideoDecoder() {
-  LOG(ERROR) << "GpuCommandBufferStub::OnDestroyVideoDecoder";
-  video_decoder_.reset();
+void GpuCommandBufferStub::OnDestroyVideoDecoder(int decoder_route_id) {
+  channel_->RemoveRoute(decoder_route_id);
+  video_decoders_.Remove(decoder_route_id);
 }
 
 #endif  // defined(ENABLE_GPU)