remoting/host/chromoting_param_traits.cc

// 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/chromoting_param_traits.h"

#include "base/strings/stringprintf.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"

namespace IPC {

// static
void ParamTraits<webrtc::DesktopVector>::Write(Message* m,
                                               const webrtc::DesktopVector& p) {
  m->WriteInt(p.x());
  m->WriteInt(p.y());
}

// static
bool ParamTraits<webrtc::DesktopVector>::Read(const Message* m,
                                              base::PickleIterator* iter,
                                              webrtc::DesktopVector* r) {
  int x, y;
  if (!iter->ReadInt(&x) || !iter->ReadInt(&y))
    return false;
  *r = webrtc::DesktopVector(x, y);
  return true;
}

// static
void ParamTraits<webrtc::DesktopVector>::Log(const webrtc::DesktopVector& p,
                                             std::string* l) {
  l->append(base::StringPrintf("webrtc::DesktopVector(%d, %d)",
                               p.x(), p.y()));
}

// static
void ParamTraits<webrtc::DesktopSize>::Write(Message* m,
                                             const webrtc::DesktopSize& p) {
  m->WriteInt(p.width());
  m->WriteInt(p.height());
}

// static
bool ParamTraits<webrtc::DesktopSize>::Read(const Message* m,
                                            base::PickleIterator* iter,
                                            webrtc::DesktopSize* r) {
  int width, height;
  if (!iter->ReadInt(&width) || !iter->ReadInt(&height))
    return false;
  *r = webrtc::DesktopSize(width, height);
  return true;
}

// static
void ParamTraits<webrtc::DesktopSize>::Log(const webrtc::DesktopSize& p,
                                           std::string* l) {
  l->append(base::StringPrintf("webrtc::DesktopSize(%d, %d)",
                               p.width(), p.height()));
}

// static
void ParamTraits<webrtc::DesktopRect>::Write(Message* m,
                                             const webrtc::DesktopRect& p) {
  m->WriteInt(p.left());
  m->WriteInt(p.top());
  m->WriteInt(p.right());
  m->WriteInt(p.bottom());
}

// static
bool ParamTraits<webrtc::DesktopRect>::Read(const Message* m,
                                            base::PickleIterator* iter,
                                            webrtc::DesktopRect* r) {
  int left, right, top, bottom;
  if (!iter->ReadInt(&left) || !iter->ReadInt(&top) ||
      !iter->ReadInt(&right) || !iter->ReadInt(&bottom)) {
    return false;
  }
  *r = webrtc::DesktopRect::MakeLTRB(left, top, right, bottom);
  return true;
}

// static
void ParamTraits<webrtc::DesktopRect>::Log(const webrtc::DesktopRect& p,
                                           std::string* l) {
  l->append(base::StringPrintf("webrtc::DesktopRect(%d, %d, %d, %d)",
                               p.left(), p.top(), p.right(), p.bottom()));
}

// static
void ParamTraits<webrtc::MouseCursor>::Write(
    Message* m,
    const webrtc::MouseCursor& p) {
  ParamTraits<webrtc::DesktopSize>::Write(m, p.image()->size());

  // Data is serialized in such a way that size is exactly width * height *
  // |kBytesPerPixel|.
  std::string data;
  uint8_t* current_row = p.image()->data();
  for (int y = 0; y < p.image()->size().height(); ++y) {
    data.append(current_row,
                current_row + p.image()->size().width() *
                    webrtc::DesktopFrame::kBytesPerPixel);
    current_row += p.image()->stride();
  }
  m->WriteData(reinterpret_cast<const char*>(p.image()->data()), data.size());

  ParamTraits<webrtc::DesktopVector>::Write(m, p.hotspot());
}

// static
bool ParamTraits<webrtc::MouseCursor>::Read(const Message* m,
                                            base::PickleIterator* iter,
                                            webrtc::MouseCursor* r) {
  webrtc::DesktopSize size;
  if (!ParamTraits<webrtc::DesktopSize>::Read(m, iter, &size) ||
      size.width() <= 0 || size.width() > (SHRT_MAX / 2) ||
      size.height() <= 0 || size.height() > (SHRT_MAX / 2)) {
    return false;
  }

  const int expected_length =
      size.width() * size.height() * webrtc::DesktopFrame::kBytesPerPixel;

  const char* data;
  int data_length;
  if (!iter->ReadData(&data, &data_length) || data_length != expected_length)
    return false;

  webrtc::DesktopVector hotspot;
  if (!ParamTraits<webrtc::DesktopVector>::Read(m, iter, &hotspot))
    return false;

  webrtc::BasicDesktopFrame* image = new webrtc::BasicDesktopFrame(size);
  memcpy(image->data(), data, data_length);

  r->set_image(image);
  r->set_hotspot(hotspot);
  return true;
}

// static
void ParamTraits<webrtc::MouseCursor>::Log(
    const webrtc::MouseCursor& p,
    std::string* l) {
  l->append(base::StringPrintf(
      "webrtc::DesktopRect{image(%d, %d), hotspot(%d, %d)}",
      p.image()->size().width(), p.image()->size().height(),
      p.hotspot().x(), p.hotspot().y()));
}


// static
void ParamTraits<remoting::ScreenResolution>::Write(
    Message* m,
    const remoting::ScreenResolution& p) {
  ParamTraits<webrtc::DesktopSize>::Write(m, p.dimensions());
  ParamTraits<webrtc::DesktopVector>::Write(m, p.dpi());
}

// static
bool ParamTraits<remoting::ScreenResolution>::Read(
    const Message* m,
    base::PickleIterator* iter,
    remoting::ScreenResolution* r) {
  webrtc::DesktopSize size;
  webrtc::DesktopVector dpi;
  if (!ParamTraits<webrtc::DesktopSize>::Read(m, iter, &size) ||
      !ParamTraits<webrtc::DesktopVector>::Read(m, iter, &dpi)) {
    return false;
  }
  if (size.width() < 0 || size.height() < 0 ||
      dpi.x() < 0 || dpi.y() < 0) {
    return false;
  }
  *r = remoting::ScreenResolution(size, dpi);
  return true;
}

// static
void ParamTraits<remoting::ScreenResolution>::Log(
    const remoting::ScreenResolution& p,
    std::string* l) {
  l->append(base::StringPrintf("webrtc::ScreenResolution(%d, %d, %d, %d)",
                               p.dimensions().width(), p.dimensions().height(),
                               p.dpi().x(), p.dpi().y()));
}

}  // namespace IPC