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// Copyright 2014 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/codec/video_encoder_helper.h"
#include "remoting/proto/video.pb.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
namespace remoting {
VideoEncoderHelper::VideoEncoderHelper() {}
scoped_ptr<VideoPacket> VideoEncoderHelper::CreateVideoPacket(
const webrtc::DesktopFrame& frame) {
return CreateVideoPacketWithUpdatedRegion(frame, frame.updated_region());
}
scoped_ptr<VideoPacket>
VideoEncoderHelper::CreateVideoPacketWithUpdatedRegion(
const webrtc::DesktopFrame& frame,
const webrtc::DesktopRegion& updated_region) {
scoped_ptr<VideoPacket> packet(new VideoPacket());
// Set |screen_width| and |screen_height| iff they have changed.
if (!frame.size().equals(screen_size_)) {
screen_size_ = frame.size();
VideoPacketFormat* format = packet->mutable_format();
format->set_screen_width(screen_size_.width());
format->set_screen_height(screen_size_.height());
}
// Record the list of changed rectangles.
for (webrtc::DesktopRegion::Iterator iter(updated_region);
!iter.IsAtEnd(); iter.Advance()) {
const webrtc::DesktopRect& rect = iter.rect();
Rect* dirty_rect = packet->add_dirty_rects();
dirty_rect->set_x(rect.left());
dirty_rect->set_y(rect.top());
dirty_rect->set_width(rect.width());
dirty_rect->set_height(rect.height());
}
// Record the shape of the frame, if specified.
if (frame.shape()) {
packet->set_use_desktop_shape(true);
for (webrtc::DesktopRegion::Iterator r(*frame.shape());
!r.IsAtEnd(); r.Advance()) {
Rect* rect = packet->add_desktop_shape_rects();
rect->set_x(r.rect().left());
rect->set_y(r.rect().top());
rect->set_width(r.rect().width());
rect->set_height(r.rect().height());
}
}
// Store the capture time and frame DPI.
packet->set_capture_time_ms(frame.capture_time_ms());
if (!frame.dpi().is_zero()) {
packet->mutable_format()->set_x_dpi(frame.dpi().x());
packet->mutable_format()->set_y_dpi(frame.dpi().y());
}
return packet.Pass();
}
} // namespace remoting
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