[Android] Upstream all the IPC communications/handlings for stream texture

content/renderer/gpu/stream_texture_host_android.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/stream_texture_host_android.h"
+
+#include "content/common/gpu/client/gpu_channel_host.h"
+#include "content/common/gpu/gpu_messages.h"
+#include "content/renderer/render_thread_impl.h"
+#include "ipc/ipc_message_macros.h"
+
+namespace content {
+
+StreamTextureHost::StreamTextureHost(GpuChannelHost* channel)
+    : route_id_(MSG_ROUTING_NONE),
+      stream_id_(0),
+      listener_(NULL),
+      channel_(channel),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
+  DCHECK(channel);
+}
+
+StreamTextureHost::~StreamTextureHost() {
+  if (channel_.get() && route_id_ != MSG_ROUTING_NONE)
+    channel_->RemoveRoute(route_id_);
+}
+
+bool StreamTextureHost::Initialize(
+    int stream_id, const gfx::Size& initial_size) {
+  if (channel_.get() && stream_id) {
+    if (channel_->Send(new GpuChannelMsg_RegisterStreamTextureProxy(
+      stream_id, initial_size, &route_id_))) {
+      stream_id_ = stream_id;
+      channel_->AddRoute(route_id_, weak_ptr_factory_.GetWeakPtr());
+    }
+    return true;
+  }
+
+  return false;
+}
+
+bool StreamTextureHost::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(StreamTextureHost, message)
+    IPC_MESSAGE_HANDLER(GpuStreamTextureMsg_FrameAvailable,
+                        OnFrameAvailable);
+    IPC_MESSAGE_HANDLER(GpuStreamTextureMsg_MatrixChanged,
+                        OnMatrixChanged);
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  DCHECK(handled);
+  return handled;
+}
+
+void StreamTextureHost::EstablishPeer(
+    content::SurfaceTexturePeer::SurfaceTextureTarget type,

[jam, 2012/07/12 23:57:21]

nit: no need for "content::"

[qinmin, 2012/07/13 00:41:33]

Done.

+    int32 primary_id, int32 secondary_id) {
+  if (channel_.get())

[apatrick_chromium, 2012/07/12 23:51:31]

nit: multiline if body should have braces.

[qinmin, 2012/07/13 00:41:33]

Done.

+    channel_->Send(new GpuChannelMsg_EstablishStreamTexture(
+        stream_id_, type,
+        primary_id, secondary_id));
+}
+void StreamTextureHost::OnChannelError() {
+}
+
+void StreamTextureHost::OnFrameAvailable() {
+  if (listener_)
+    listener_->OnFrameAvailable();
+}
+
+void StreamTextureHost::OnMatrixChanged(
+    const GpuStreamTextureMsg_MatrixChanged_Params& params) {
+  COMPILE_ASSERT(sizeof(params) == sizeof(float) * 16,
+                 bad_GpuStreamTextureMsg_MatrixChanged_Params_format);
+  if (listener_)
+    listener_->OnMatrixChanged((const float*)&params);
+}
+
+}  // namespace content