Rename Capturer to VideoFrameCapturer.

remoting/host/video_frame_capturer_fake.cc

+// Copyright (c) 2012 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/video_frame_capturer_fake.h"
+
+#include "remoting/base/capture_data.h"
+
+namespace remoting {
+
+// VideoFrameCapturerFake 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 = 800;
+static const int kHeight = 600;
+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);
+
+static const int kBytesPerPixel = 4;  // 32 bit RGB is 4 bytes per pixel.
+
+VideoFrameCapturerFake::VideoFrameCapturerFake()
+    : bytes_per_row_(0),
+      box_pos_x_(0),
+      box_pos_y_(0),
+      box_speed_x_(kSpeed),
+      box_speed_y_(kSpeed),
+      current_buffer_(0),
+      pixel_format_(media::VideoFrame::RGB32) {
+  ScreenConfigurationChanged();
+}
+
+VideoFrameCapturerFake::~VideoFrameCapturerFake() {
+}
+
+void VideoFrameCapturerFake::Start(const CursorShapeChangedCallback& callback) {
+}
+
+void VideoFrameCapturerFake::Stop() {
+}
+
+void VideoFrameCapturerFake::ScreenConfigurationChanged() {
+  size_ = SkISize::Make(kWidth, kHeight);
+  bytes_per_row_ = size_.width() * kBytesPerPixel;
+  pixel_format_ = media::VideoFrame::RGB32;
+
+  // Create memory for the buffers.
+  int buffer_size = size_.height() * bytes_per_row_;
+  for (int i = 0; i < kNumBuffers; i++) {
+    buffers_[i].reset(new uint8[buffer_size]);
+  }
+}
+
+media::VideoFrame::Format VideoFrameCapturerFake::pixel_format() const {
+  return pixel_format_;
+}
+
+void VideoFrameCapturerFake::ClearInvalidRegion() {
+  helper_.ClearInvalidRegion();
+}
+
+void VideoFrameCapturerFake::InvalidateRegion(const SkRegion& invalid_region) {
+  helper_.InvalidateRegion(invalid_region);
+}
+
+void VideoFrameCapturerFake::InvalidateScreen(const SkISize& size) {
+  helper_.InvalidateScreen(size);
+}
+
+void VideoFrameCapturerFake::InvalidateFullScreen() {
+  helper_.InvalidateFullScreen();
+}
+
+void VideoFrameCapturerFake::CaptureInvalidRegion(
+    const CaptureCompletedCallback& callback) {
+  GenerateImage();
+  InvalidateScreen(size_);
+
+  SkRegion invalid_region;
+  helper_.SwapInvalidRegion(&invalid_region);
+
+  DataPlanes planes;
+  planes.data[0] = buffers_[current_buffer_].get();
+  current_buffer_ = (current_buffer_ + 1) % kNumBuffers;
+  planes.strides[0] = bytes_per_row_;
+
+  scoped_refptr<CaptureData> capture_data(new CaptureData(planes,
+                                                          size_,
+                                                          pixel_format_));
+  capture_data->mutable_dirty_region() = invalid_region;
+
+  helper_.set_size_most_recent(capture_data->size());
+
+  callback.Run(capture_data);
+}
+
+const SkISize& VideoFrameCapturerFake::size_most_recent() const {
+  return helper_.size_most_recent();
+}
+
+void VideoFrameCapturerFake::GenerateImage() {
+  memset(buffers_[current_buffer_].get(), 0xff,
+         size_.width() * size_.height() * kBytesPerPixel);
+
+  uint8* row = buffers_[current_buffer_].get() +
+      (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_;
+  }
+}
+
+}  // namespace remoting