Remove screen capturers from media/video/capture/screen.

Screen capturers have been moved to webrtc. This change 
switches chromoting and getUserMedia() to the new copy of the 
capturers in webrtc and removes old copy from media.

TBR=jschuh@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15692018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204966 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 128 insertions, 0 deletions

diff --git a/remoting/host/screen_capturer_fake.cc b/remoting/host/screen_capturer_fake.cc
new file mode 100644
index 0000000..0a6707c
--- /dev/null
+++ b/remoting/host/screen_capturer_fake.cc
@@ -0,0 +1,128 @@
+// Copyright 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 "remoting/host/screen_capturer_fake.h"
+
+#include "base/logging.h"
+#include "base/time.h"
+#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
+
+namespace remoting {
+
+// ScreenCapturerFake generates a white picture of size kWidth x kHeight
+// with a rectangle of size kBoxWidth x kBoxHeight. The rectangle moves kSpeed
+// pixels per frame along both axes, and bounces off the sides of the screen.
+static const int kWidth = ScreenCapturerFake::kWidth;
+static const int kHeight = ScreenCapturerFake::kHeight;
+static const int kBoxWidth = 140;
+static const int kBoxHeight = 140;
+static const int kSpeed = 20;
+
+COMPILE_ASSERT(kBoxWidth < kWidth && kBoxHeight < kHeight, bad_box_size);
+COMPILE_ASSERT((kBoxWidth % kSpeed == 0) && (kWidth % kSpeed == 0) &&
+               (kBoxHeight % kSpeed == 0) && (kHeight % kSpeed == 0),
+               sizes_must_be_multiple_of_kSpeed);
+
+ScreenCapturerFake::ScreenCapturerFake()
+    : callback_(NULL),
+      mouse_shape_observer_(NULL),
+      bytes_per_row_(0),
+      box_pos_x_(0),
+      box_pos_y_(0),
+      box_speed_x_(kSpeed),
+      box_speed_y_(kSpeed) {
+  ScreenConfigurationChanged();
+}
+
+ScreenCapturerFake::~ScreenCapturerFake() {
+}
+
+void ScreenCapturerFake::Start(Callback* callback) {
+  DCHECK(!callback_);
+  DCHECK(callback);
+  callback_ = callback;
+}
+
+void ScreenCapturerFake::Capture(const webrtc::DesktopRegion& region) {
+  base::Time capture_start_time = base::Time::Now();
+
+  queue_.MoveToNextFrame();
+
+  if (!queue_.current_frame()) {
+    int buffer_size = size_.height() * bytes_per_row_;
+    webrtc::SharedMemory* shared_memory =
+        callback_->CreateSharedMemory(buffer_size);
+    scoped_ptr<webrtc::DesktopFrame> frame;
+    webrtc::DesktopSize frame_size(size_.width(), size_.height());
+    if (shared_memory) {
+      frame.reset(new webrtc::SharedMemoryDesktopFrame(
+          frame_size, bytes_per_row_, shared_memory));
+    } else {
+      frame.reset(new webrtc::BasicDesktopFrame(frame_size));
+    }
+    queue_.ReplaceCurrentFrame(frame.release());
+  }
+
+  DCHECK(queue_.current_frame());
+  GenerateImage();
+
+  queue_.current_frame()->mutable_updated_region()->SetRect(
+      webrtc::DesktopRect::MakeSize(size_));
+  queue_.current_frame()->set_capture_time_ms(
+      (base::Time::Now() - capture_start_time).InMillisecondsRoundedUp());
+
+  callback_->OnCaptureCompleted(queue_.current_frame()->Share());
+}
+
+void ScreenCapturerFake::SetMouseShapeObserver(
+      MouseShapeObserver* mouse_shape_observer) {
+  DCHECK(!mouse_shape_observer_);
+  DCHECK(mouse_shape_observer);
+  mouse_shape_observer_ = mouse_shape_observer;
+}
+
+void ScreenCapturerFake::GenerateImage() {
+  webrtc::DesktopFrame* frame = queue_.current_frame();
+
+  const int kBytesPerPixel = webrtc::DesktopFrame::kBytesPerPixel;
+
+  memset(frame->data(), 0xff,
+         size_.width() * size_.height() * kBytesPerPixel);
+
+  uint8* row = frame->data() +
+      (box_pos_y_ * size_.width() + box_pos_x_) * kBytesPerPixel;
+
+  box_pos_x_ += box_speed_x_;
+  if (box_pos_x_ + kBoxWidth >= size_.width() || box_pos_x_ == 0)
+    box_speed_x_ = -box_speed_x_;
+
+  box_pos_y_ += box_speed_y_;
+  if (box_pos_y_ + kBoxHeight >= size_.height() || box_pos_y_ == 0)
+    box_speed_y_ = -box_speed_y_;
+
+  // Draw rectangle with the following colors in its corners:
+  //     cyan....yellow
+  //     ..............
+  //     blue.......red
+  for (int y = 0; y < kBoxHeight; ++y) {
+    for (int x = 0; x < kBoxWidth; ++x) {
+      int r = x * 255 / kBoxWidth;
+      int g = y * 255 / kBoxHeight;
+      int b = 255 - (x * 255 / kBoxWidth);
+      row[x * kBytesPerPixel] = r;
+      row[x * kBytesPerPixel + 1] = g;
+      row[x * kBytesPerPixel + 2] = b;
+      row[x * kBytesPerPixel + 3] = 0xff;
+    }
+    row += bytes_per_row_;
+  }
+}
+
+void ScreenCapturerFake::ScreenConfigurationChanged() {
+  size_.set(kWidth, kHeight);
+  queue_.Reset();
+  bytes_per_row_ = size_.width() * webrtc::DesktopFrame::kBytesPerPixel;
+}
+
+}  // namespace remoting