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// 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/codec/video_encoder_verbatim.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "base/time/time.h"
#include "remoting/base/util.h"
#include "remoting/proto/video.pb.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
namespace remoting {
static const int kPacketSize = 1024 * 1024;
VideoEncoderVerbatim::VideoEncoderVerbatim() {}
VideoEncoderVerbatim::~VideoEncoderVerbatim() {}
scoped_ptr<VideoPacket> VideoEncoderVerbatim::Encode(
const webrtc::DesktopFrame& frame) {
CHECK(frame.data());
base::Time encode_start_time = base::Time::Now();
scoped_ptr<VideoPacket> packet(new VideoPacket());
VideoPacketFormat* format = packet->mutable_format();
format->set_encoding(VideoPacketFormat::ENCODING_VERBATIM);
if (!frame.size().equals(screen_size_)) {
screen_size_ = frame.size();
format->set_screen_width(screen_size_.width());
format->set_screen_height(screen_size_.height());
}
// Calculate output size.
size_t output_size = 0;
for (webrtc::DesktopRegion::Iterator iter(frame.updated_region());
!iter.IsAtEnd(); iter.Advance()) {
const webrtc::DesktopRect& rect = iter.rect();
output_size += rect.width() * rect.height() *
webrtc::DesktopFrame::kBytesPerPixel;
}
uint8_t* out = GetOutputBuffer(packet.get(), output_size);
const int in_stride = frame.stride();
// Store all changed rectangles in the packet.
for (webrtc::DesktopRegion::Iterator iter(frame.updated_region());
!iter.IsAtEnd(); iter.Advance()) {
const webrtc::DesktopRect& rect = iter.rect();
const int row_size = webrtc::DesktopFrame::kBytesPerPixel * rect.width();
const uint8_t* in = frame.data() + rect.top() * in_stride +
rect.left() * webrtc::DesktopFrame::kBytesPerPixel;
for (int y = rect.top(); y < rect.top() + rect.height(); ++y) {
memcpy(out, in, row_size);
out += row_size;
in += in_stride;
}
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());
}
packet->set_capture_time_ms(frame.capture_time_ms());
packet->set_encode_time_ms(
(base::Time::Now() - encode_start_time).InMillisecondsRoundedUp());
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();
}
uint8_t* VideoEncoderVerbatim::GetOutputBuffer(VideoPacket* packet,
size_t size) {
packet->mutable_data()->resize(size);
return reinterpret_cast<uint8_t*>(string_as_array(packet->mutable_data()));
}
} // namespace remoting
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