media: gpu process ipc video decoder implementation

chrome/renderer/gpu_video_service_host.cc

+// Copyright (c) 2010 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 "chrome/renderer/gpu_video_service_host.h"
+
+#include "chrome/common/gpu_messages.h"
+#include "chrome/renderer/gpu_video_decoder_host.h"
+#include "chrome/renderer/render_thread.h"
+
+void GpuVideoServiceHost::OnChannelError() {
+  LOG(ERROR) << "GpuVideoServiceHost::OnChannelError";
+  channel_host_.release();
+  router_ = NULL;
+}
+
+void GpuVideoServiceHost::OnMessageReceived(const IPC::Message& msg) {
+#if 0
+  IPC_BEGIN_MESSAGE_MAP(GpuVideoServiceHost, msg)
+    IPC_MESSAGE_UNHANDLED_ERROR()
+  IPC_END_MESSAGE_MAP()
+#endif
+}
+
+scoped_refptr<GpuVideoDecoderHost> GpuVideoServiceHost::CreateVideoDecoder(
+    GpuVideoDecoderHost::EventHandler* event_handler) {
+  DCHECK(RenderThread::current());
+
+  if (!channel_host_.get() || !service_info_.service_available_)
+    return NULL;
+
+  GpuVideoDecoderInfoParam param;
+  if (!channel_host_->Send(new GpuChannelMsg_CreateVideoDecoder(&param))) {
+    LOG(ERROR) << "GpuChannelMsg_CreateVideoDecoder failed";
+    return NULL;
+  }
+
+  scoped_refptr<GpuVideoDecoderHost> gpu_video_decoder_host =
+      new GpuVideoDecoderHost(this, channel_host_, event_handler, param);
+  if (!gpu_video_decoder_host.get()) {
+    if (!channel_host_->Send(
+        new GpuChannelMsg_DestroyVideoDecoder(param.decoder_id_))) {
+      LOG(ERROR) << "GpuChannelMsg_DestroyVideoDecoder failed";
+    }
+    return NULL;
+  }
+
+  router_->AddRoute(gpu_video_decoder_host->my_route_id(),
+                    gpu_video_decoder_host.get());
+  return gpu_video_decoder_host;
+}
+
+void GpuVideoServiceHost::DestroyVideoDecoder(
+    scoped_refptr<GpuVideoDecoderHost> gpu_video_decoder_host) {
+  DCHECK(RenderThread::current());
+
+  if (!channel_host_.get() || !service_info_.service_available_)
+    return;
+
+  DCHECK(gpu_video_decoder_host.get());
+
+  int32 decoder_id = gpu_video_decoder_host->decoder_id();
+  if (!channel_host_->Send(new GpuChannelMsg_DestroyVideoDecoder(decoder_id))) {
+    LOG(ERROR) << "GpuChannelMsg_DestroyVideoDecoder failed";
+  }
+
+  router_->RemoveRoute(gpu_video_decoder_host->my_route_id());
+}
+
+void GpuVideoServiceHost::OnRendererThreadInit(MessageLoop* message_loop) {
+  message_loop_ = message_loop;
+}
+
+void GpuVideoServiceHost::OnGpuChannelConnected(
+    GpuChannelHost* channel_host,
+    MessageRouter* router,
+    IPC::SyncChannel* channel) {
+
+  channel_host_ = channel_host;
+  router_ = router;
+
+  // Get the routing_id of video service in GPU process.
+  service_info_.service_available_ = 0;
+  if (!channel_host_->Send(new GpuChannelMsg_GetVideoService(&service_info_))) {
+    LOG(ERROR) << "GpuChannelMsg_GetVideoService failed";
+  }
+
+  if (service_info_.service_available_)
+    router->AddRoute(service_info_.video_service_host_route_id_, this);
+}
+