Enable fire-and-forget Destroy of HW video decoder, and misc other improvements.

content/renderer/gpu/gpu_video_service_host.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.
-
-#include "content/renderer/gpu/gpu_video_service_host.h"
-
-#include "content/common/gpu/gpu_messages.h"
-#include "content/renderer/gpu/gpu_video_decode_accelerator_host.h"
-#include "content/renderer/render_thread.h"
-#include "media/video/video_decode_accelerator.h"
-
-GpuVideoServiceHost::GpuVideoServiceHost()
-    : channel_(NULL),
-      next_decoder_host_id_(0) {
-  DCHECK(RenderThread::current());
-  DCHECK_EQ(RenderThread::current()->message_loop(), MessageLoop::current());
-}
-
-GpuVideoServiceHost::~GpuVideoServiceHost() {
-}
-
-void GpuVideoServiceHost::set_channel(IPC::SyncChannel* channel) {
-  DCHECK(CalledOnValidThread());
-  DCHECK(!channel_);
-  channel_ = channel;
-  if (!on_initialized_.is_null())
-    on_initialized_.Run();
-}
-
-bool GpuVideoServiceHost::OnMessageReceived(const IPC::Message& msg) {
-  DCHECK(CalledOnValidThread());
-  if (!channel_)
-    return false;
-  switch (msg.type()) {
-    case AcceleratedVideoDecoderHostMsg_BitstreamBufferProcessed::ID:
-    case AcceleratedVideoDecoderHostMsg_ProvidePictureBuffers::ID:
-    case AcceleratedVideoDecoderHostMsg_InitializeDone::ID:
-    case AcceleratedVideoDecoderHostMsg_DismissPictureBuffer::ID:
-    case AcceleratedVideoDecoderHostMsg_PictureReady::ID:
-    case AcceleratedVideoDecoderHostMsg_FlushDone::ID:
-    case AcceleratedVideoDecoderHostMsg_ResetDone::ID:
-    case AcceleratedVideoDecoderHostMsg_DestroyDone::ID:
-    case AcceleratedVideoDecoderHostMsg_EndOfStream::ID:
-    case AcceleratedVideoDecoderHostMsg_ErrorNotification::ID:
-      if (router_.RouteMessage(msg))
-        return true;
-      LOG(ERROR) << "AcceleratedVideoDecoderHostMsg cannot be dispatched.";
-    default:
-      return false;
-  }
-}
-
-void GpuVideoServiceHost::OnChannelError() {
-  DCHECK(CalledOnValidThread());
-  channel_ = NULL;
-}
-
-void GpuVideoServiceHost::SetOnInitialized(
-    const base::Closure& on_initialized) {
-  DCHECK(CalledOnValidThread());
-  DCHECK(on_initialized_.is_null());
-  on_initialized_ = on_initialized;
-  if (channel_)
-    on_initialized.Run();
-}
-
-GpuVideoDecodeAcceleratorHost* GpuVideoServiceHost::CreateVideoAccelerator(
-    media::VideoDecodeAccelerator::Client* client,
-    int32 command_buffer_route_id,
-    gpu::CommandBufferHelper* cmd_buffer_helper) {
-  DCHECK(CalledOnValidThread());
-  DCHECK(channel_);
-  return new GpuVideoDecodeAcceleratorHost(
-      &router_, channel_, next_decoder_host_id_++,
-      command_buffer_route_id, cmd_buffer_helper, client);
-}