Add content::SurfaceCapturer

content/common/gpu/media/gl_surface_capturer.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/media/gl_surface_capturer.h"
+
+#include "base/message_loop/message_loop_proxy.h"
+#include "content/common/gpu/gpu_channel.h"
+#include "content/common/gpu/gpu_messages.h"
+#include "ipc/ipc_message_macros.h"
+
+namespace content {
+
+namespace {
+
+enum {
+  kMaxCaptureSize = 4096,
+};
+
+}  // anonymous namespace
+
+GLSurfaceCapturer::GLSurfaceCapturer(int32 route_id, GpuCommandBufferStub* stub)
+    : thread_checker_(),
+      route_id_(route_id),
+      stub_(stub),
+      output_format_(media::VideoFrame::INVALID) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  stub_->AddDestructionObserver(this);
+  stub_->channel()->AddRoute(route_id_, this);
+}
+
+GLSurfaceCapturer::~GLSurfaceCapturer() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (surface_capturer_)
+    surface_capturer_.release()->Destroy();
+
+  stub_->channel()->RemoveRoute(route_id_);
+  stub_->RemoveDestructionObserver(this);
+}
+
+bool GLSurfaceCapturer::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(GLSurfaceCapturer, message)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerMsg_Initialize, OnInitialize)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerMsg_TryCapture, OnTryCapture)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerMsg_CopyCaptureToVideoFrame,
+                        OnCopyCaptureToVideoFrame)
+    IPC_MESSAGE_HANDLER(SurfaceCapturerMsg_Destroy, OnDestroy)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void GLSurfaceCapturer::NotifyCaptureParameters(const gfx::Size& buffer_size,
+                                                const gfx::Rect& visible_rect) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (buffer_size.width() > kMaxCaptureSize ||

[Cris Neckar, 2013/08/26 22:40:03]

Aren't these signed ints underneath. Negatives would be bad here too..

[sheu, 2013/08/27 01:20:03]

Done.

+      buffer_size.height() > kMaxCaptureSize ||
+      visible_rect.x() > kMaxCaptureSize ||
+      visible_rect.y() > kMaxCaptureSize ||
+      visible_rect.width() > kMaxCaptureSize ||
+      visible_rect.height() > kMaxCaptureSize) {
+    DLOG(ERROR) << "NotifyCaptureParameters(): parameters out of bounds: "
+                   "buffer_size=" << buffer_size.ToString()
+                << ", visible_rect=" << visible_rect.ToString();
+    NotifyError(SurfaceCapturer::kInvalidArgumentError);
+    return;
+  }
+  output_buffer_size_ = buffer_size;
+  output_visible_rect_ = visible_rect;
+  Send(new SurfaceCapturerHostMsg_NotifyCaptureParameters(
+      route_id_, buffer_size, visible_rect));
+}
+
+void GLSurfaceCapturer::NotifyCopyCaptureDone(
+    const scoped_refptr<media::VideoFrame>& frame) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  FrameIdMap::iterator iter = frame_id_map_.find(frame);
+  if (iter == frame_id_map_.end()) {
+    DLOG(ERROR) << "NotifyCopyCaptureDone(): invalid frame";
+    NotifyError(SurfaceCapturer::kInvalidArgumentError);
+    return;
+  }
+  Send(new SurfaceCapturerHostMsg_NotifyCopyCaptureDone(route_id_,
+                                                        iter->second));
+  frame_id_map_.erase(iter);
+}
+
+void GLSurfaceCapturer::NotifyError(SurfaceCapturer::Error error) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  Send(new SurfaceCapturerHostMsg_NotifyError(route_id_, error));
+}
+
+void GLSurfaceCapturer::OnWillDestroyStub() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  delete this;
+}
+
+void GLSurfaceCapturer::OnInitialize(media::VideoFrame::Format format) {
+  DVLOG(2) << "OnInitialize(): format=" << format;
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!surface_capturer_);
+
+  // TODO(sheu): actually create a surface capturer.
+
+  if (!surface_capturer_) {
+    NOTIMPLEMENTED() << "OnInitialize(): GL surface capturing not available";
+    NotifyError(SurfaceCapturer::kPlatformFailureError);
+    return;
+  }
+
+  output_format_ = format;
+  surface_capturer_->Initialize(output_format_);
+}
+
+void GLSurfaceCapturer::OnTryCapture() {
+  DVLOG(3) << "OnTryCapture()";
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (!surface_capturer_)
+    return;
+  surface_capturer_->TryCapture();
+}
+
+static void DeleteShm(scoped_ptr<base::SharedMemory> shm) {
+  // Just let shm fall out of scope.
+}
+
+void GLSurfaceCapturer::OnCopyCaptureToVideoFrame(
+    int32 frame_id,
+    base::SharedMemoryHandle buffer_shm,
+    uint32_t buffer_size) {
+  DVLOG(3) << "OnCopyCaptureToVideoFrame(): frame_id=" << frame_id
+           << ", buffer_size=" << buffer_size;
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (!surface_capturer_)
+    return;
+  if (frame_id < 0) {
+    DLOG(ERROR) << "OnCopyCaptureToVideoFrame(): invalid frame_id=" << frame_id;
+    NotifyError(SurfaceCapturer::kPlatformFailureError);
+    return;
+  }
+
+  scoped_ptr<base::SharedMemory> shm(new base::SharedMemory(buffer_shm, false));
+  if (!shm->Map(buffer_size)) {
+    DLOG(ERROR) << "OnCopyCaptureToVideoFrame(): could not map "
+                   "frame_id=" << frame_id;
+    NotifyError(SurfaceCapturer::kPlatformFailureError);
+    return;
+  }
+  scoped_refptr<media::VideoFrame> frame =
+      media::VideoFrame::WrapExternalSharedMemory(
+          output_format_,
+          output_buffer_size_,
+          output_visible_rect_,
+          output_visible_rect_.size(),
+          reinterpret_cast<uint8*>(shm->memory()),
+          buffer_size,
+          buffer_shm,
+          base::TimeDelta(),
+          base::Bind(&DeleteShm, base::Passed(&shm)));
+  if (!frame) {
+    DLOG(ERROR) << "OnCopyCaptureToVideoFrame(): could not create frame for"
+                   "frame_id=" << frame_id;
+    NotifyError(SurfaceCapturer::kPlatformFailureError);
+    return;
+  }
+  frame_id_map_[frame] = frame_id;
+  surface_capturer_->CopyCaptureToVideoFrame(frame);
+}
+
+void GLSurfaceCapturer::OnDestroy() {
+  DVLOG(2) << "OnDestroy()";
+  DCHECK(thread_checker_.CalledOnValidThread());
+  delete this;
+}
+
+void GLSurfaceCapturer::Send(IPC::Message* message) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  uint32 type = message->type();
+  if (!stub_->channel()->Send(message)) {
+    DLOG(ERROR) << "Send(): send failed: message->type()=" << type;
+    NotifyError(SurfaceCapturer::kPlatformFailureError);
+  }
+}
+
+}  // namespace content