Add content::SurfaceCapturer

content/common/gpu/client/gl_surface_capturer_host.cc

+// Copyright (c) 2013 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/common/gpu/client/gl_surface_capturer_host.h"
+
+#include "content/common/gpu/client/gpu_channel_host.h"
+#include "content/common/gpu/gpu_messages.h"
+#include "ipc/ipc_message_macros.h"
+
+namespace content {
+
+namespace {
+
+enum {
+  kNumCaptureBuffers = 2,
+  kMaxCaptureSize = 4096,
+};
+
+}  // anonymous namespace
+
+GLSurfaceCapturerHost::GLSurfaceCapturerHost(int32 capturer_route_id,
+                                             SurfaceCapturer::Client* client,
+                                             CommandBufferProxyImpl* impl)
+    : thread_checker_(),
+      capturer_route_id_(capturer_route_id),
+      weak_this_factory_(this),
+      client_ptr_factory_(client),
+      client_(client),
+      impl_(impl),
+      channel_(impl_->channel()),
+      next_frame_id_(0) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  channel_->AddRoute(capturer_route_id_, weak_this_factory_.GetWeakPtr());
+  impl_->AddDeletionObserver(this);
+}
+
+void GLSurfaceCapturerHost::OnChannelError() {
+  DLOG(ERROR) << "OnChannelError()";
+  DCHECK(thread_checker_.CalledOnValidThread());
+  OnNotifyError(kPlatformFailureError);
+  if (channel_) {
+    weak_this_factory_.InvalidateWeakPtrs();
+    channel_->RemoveRoute(capturer_route_id_);
+    channel_ = NULL;
+  }
+}
+
+bool GLSurfaceCapturerHost::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(GLSurfaceCapturerHost, message)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerHostMsg_NotifyCaptureParameters,
+                        OnNotifyCaptureParameters)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerHostMsg_NotifyCopyCaptureDone,
+                        OnNotifyCopyCaptureDone)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerHostMsg_NotifyError, OnNotifyError)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void GLSurfaceCapturerHost::Initialize(media::VideoFrame::Format format) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  Send(new SurfaceCapturerMsg_Initialize(capturer_route_id_, format));
+}
+
+void GLSurfaceCapturerHost::TryCapture() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  Send(new SurfaceCapturerMsg_TryCapture(capturer_route_id_));
+}
+
+void GLSurfaceCapturerHost::CopyCaptureToVideoFrame(
+    const scoped_refptr<media::VideoFrame>& frame) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (!channel_)
+    return;
+  if (!base::SharedMemory::IsHandleValid(frame->shared_memory_handle())) {
+    DLOG(ERROR) << "CopyCaptureToVideoFrame(): cannot capture to frame not "
+                   "backed by shared memory";
+    OnNotifyError(kPlatformFailureError);
+    return;
+  }
+  base::SharedMemoryHandle handle =
+      channel_->ShareToGpuProcess(frame->shared_memory_handle());
+  if (!base::SharedMemory::IsHandleValid(frame->shared_memory_handle())) {
+    DLOG(ERROR) << "CopyCaptureToVideoFrame(): failed to duplicate buffer "
+                   "handle for GPU process";
+    OnNotifyError(kPlatformFailureError);
+    return;
+  }
+
+  const size_t plane_count = media::VideoFrame::NumPlanes(frame->format());
+  size_t frame_size = 0;
+  for (size_t i = 0; i < plane_count; ++i) {
+    DCHECK_EQ(reinterpret_cast<void*>(frame->data(i)),
+              reinterpret_cast<void*>((frame->data(0) + frame_size)))
+        << "plane=" << i;
+    frame_size += frame->stride(i) * frame->rows(i);
+  }
+
+  Send(new SurfaceCapturerMsg_CopyCaptureToVideoFrame(
+      capturer_route_id_, next_frame_id_, handle, frame_size));
+  frame_map_[next_frame_id_] = frame;
+  next_frame_id_ = (next_frame_id_ + 1) & 0x3FFFFFFF;
+}
+
+void GLSurfaceCapturerHost::Destroy() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  client_ = NULL;

[piman, 2013/08/28 21:59:44]

client_ptr_factory_.InvalidateWeakPtrs()
(but see below).

[sheu, 2013/08/28 22:20:18]

Done.

+  Send(new SurfaceCapturerMsg_Destroy(capturer_route_id_));
+}
+
+void GLSurfaceCapturerHost::OnWillDeleteImpl() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  impl_ = NULL;
+  OnChannelError();
+}
+
+GLSurfaceCapturerHost::~GLSurfaceCapturerHost() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  weak_this_factory_.InvalidateWeakPtrs();
+  if (channel_)
+    channel_->RemoveRoute(capturer_route_id_);
+  if (impl_)
+    impl_->RemoveDeletionObserver(this);
+}
+
+void GLSurfaceCapturerHost::NotifyError(Error error) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  base::MessageLoopProxy::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&SurfaceCapturer::Client::NotifyError,

[piman, 2013/08/28 21:59:44]

Why not PostTask(&GLSurfaceCapturerHost::OnNotifyError,
weak_this_factory_.GetWeakPtr(), error) ?
That way you don't need client_ptr_factory_

[sheu, 2013/08/28 22:20:18]

Done.

+                 client_ptr_factory_.GetWeakPtr(),
+                 error));
+}
+
+void GLSurfaceCapturerHost::OnNotifyCaptureParameters(
+    const gfx::Size& buffer_size,
+    const gfx::Rect& visible_rect) {
+  DVLOG(2) << "OnNotifyCaptureParameters(): "
+              "buffer_size=" << buffer_size.ToString()
+           << ", visible_rect=" << visible_rect.ToString();
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (buffer_size.width() < 1 || buffer_size.width() > kMaxCaptureSize ||
+      buffer_size.height() < 1 || buffer_size.height() > kMaxCaptureSize ||
+      visible_rect.x() < 0 || visible_rect.x() > kMaxCaptureSize - 1 ||
+      visible_rect.y() < 0 || visible_rect.y() > kMaxCaptureSize - 1 ||
+      visible_rect.width() < 1 || visible_rect.width() > kMaxCaptureSize ||
+      visible_rect.height() < 1 || visible_rect.height() > kMaxCaptureSize) {
+    DLOG(ERROR) << "OnNotifyCaptureParameters(): parameters out of bounds: "
+                   "buffer_size=" << buffer_size.ToString()
+                << ", visible_rect=" << visible_rect.ToString();
+    OnNotifyError(kPlatformFailureError);
+    return;
+  }
+  if (client_)
+    client_->NotifyCaptureParameters(buffer_size, visible_rect);
+}
+
+void GLSurfaceCapturerHost::OnNotifyCopyCaptureDone(int32 frame_id) {
+  DVLOG(3) << "OnNotifyCopyCaptureDone(): frame_id=" << frame_id;
+  DCHECK(thread_checker_.CalledOnValidThread());
+  FrameMap::iterator iter = frame_map_.find(frame_id);
+  if (iter == frame_map_.end()) {
+    DLOG(ERROR) << "OnNotifyCopyCaptureDone(): invalid frame_id=" << frame_id;
+    OnNotifyError(kPlatformFailureError);
+    return;
+  }
+  if (client_)
+    client_->NotifyCopyCaptureDone(iter->second);
+  frame_map_.erase(iter);
+}
+
+void GLSurfaceCapturerHost::OnNotifyError(Error error) {
+  DVLOG(2) << "OnNotifyError(): error=" << error;
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (client_) {
+    client_->NotifyError(error);
+    client_ = NULL;
+    client_ptr_factory_.InvalidateWeakPtrs();
+  }
+}
+
+void GLSurfaceCapturerHost::Send(IPC::Message* message) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  uint32 type = message->type();
+  if (!channel_) {
+    DLOG(ERROR) << "Send(): no channel";
+    delete message;
+    NotifyError(kPlatformFailureError);
+  } else if (!channel_->Send(message)) {
+    DLOG(ERROR) << "Send(): failed: message->type()=" << type;
+    NotifyError(kPlatformFailureError);
+  }
+}
+
+}  // namespace content