remoting/codec/video_encoder_helper.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "remoting/codec/video_encoder_helper.h"
   6
   7 #include "remoting/proto/video.pb.h"
   8 #include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
   9 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
  10 #include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
  11
  12 namespace remoting {
  13
  14 VideoEncoderHelper::VideoEncoderHelper() {}
  15
  16 scoped_ptr<VideoPacket> VideoEncoderHelper::CreateVideoPacket(
  17     const webrtc::DesktopFrame& frame) {
  18   return CreateVideoPacketWithUpdatedRegion(frame, frame.updated_region());
  19 }
  20
  21 scoped_ptr<VideoPacket>
  22 VideoEncoderHelper::CreateVideoPacketWithUpdatedRegion(
  23     const webrtc::DesktopFrame& frame,
  24     const webrtc::DesktopRegion& updated_region) {
  25   scoped_ptr<VideoPacket> packet(new VideoPacket());
  26
  27   // Set |screen_width| and |screen_height| iff they have changed.
  28   if (!frame.size().equals(screen_size_)) {
  29     screen_size_ = frame.size();
  30
  31     VideoPacketFormat* format = packet->mutable_format();
  32     format->set_screen_width(screen_size_.width());
  33     format->set_screen_height(screen_size_.height());
  34   }
  35
  36   // Record the list of changed rectangles.
  37   for (webrtc::DesktopRegion::Iterator iter(updated_region);
  38        !iter.IsAtEnd(); iter.Advance()) {
  39     const webrtc::DesktopRect& rect = iter.rect();
  40     Rect* dirty_rect = packet->add_dirty_rects();
  41     dirty_rect->set_x(rect.left());
  42     dirty_rect->set_y(rect.top());
  43     dirty_rect->set_width(rect.width());
  44     dirty_rect->set_height(rect.height());
  45   }
  46
  47   // Record the shape of the frame, if specified.
  48   if (frame.shape()) {
  49     packet->set_use_desktop_shape(true);
  50     for (webrtc::DesktopRegion::Iterator r(*frame.shape());
  51          !r.IsAtEnd(); r.Advance()) {
  52       Rect* rect = packet->add_desktop_shape_rects();
  53       rect->set_x(r.rect().left());
  54       rect->set_y(r.rect().top());
  55       rect->set_width(r.rect().width());
  56       rect->set_height(r.rect().height());
  57     }
  58   }
  59
  60   // Store the capture time and frame DPI.
  61   packet->set_capture_time_ms(frame.capture_time_ms());
  62   if (!frame.dpi().is_zero()) {
  63     packet->mutable_format()->set_x_dpi(frame.dpi().x());
  64     packet->mutable_format()->set_y_dpi(frame.dpi().y());
  65   }
  66
  67   return packet.Pass();
  68 }
  69
  70 }  // namespace remoting