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// Copyright 2016 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/test/cyclic_frame_generator.h"
#include "base/base_paths.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/time/default_tick_clock.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "ui/gfx/codec/png_codec.h"
namespace remoting {
namespace test {
namespace {
const int kBarcodeCellWidth = 8;
const int kBarcodeCellHeight = 8;
const int kBarcodeBits = 10;
const int kBarcodeBlackThreshold = 85;
const int kBarcodeWhiteThreshold = 170;
scoped_ptr<webrtc::DesktopFrame> LoadDesktopFrameFromPng(
const base::FilePath& file_path) {
std::string file_content;
if (!base::ReadFileToString(file_path, &file_content))
LOG(FATAL) << "Failed to read " << file_path.MaybeAsASCII()
<< ". Please run remoting/test/data/download.sh";
SkBitmap bitmap;
gfx::PNGCodec::Decode(reinterpret_cast<const uint8_t*>(file_content.data()),
file_content.size(), &bitmap);
scoped_ptr<webrtc::DesktopFrame> frame(new webrtc::BasicDesktopFrame(
webrtc::DesktopSize(bitmap.width(), bitmap.height())));
bitmap.copyPixelsTo(frame->data(),
frame->stride() * frame->size().height(),
frame->stride());
return frame;
}
void DrawRect(webrtc::DesktopFrame* frame,
webrtc::DesktopRect rect,
uint32_t color) {
for (int y = rect.top(); y < rect.bottom(); ++y) {
uint32_t* data = reinterpret_cast<uint32_t*>(
frame->data() + y * frame->stride() +
rect.left() * webrtc::DesktopFrame::kBytesPerPixel);
for (int x = 0; x < rect.width(); ++x) {
data[x] = color;
}
}
}
} // namespace
CyclicFrameGenerator::FrameInfo::FrameInfo() = default;
CyclicFrameGenerator::FrameInfo::FrameInfo(int frame_id,
FrameType type,
base::TimeTicks timestamp)
: frame_id(frame_id), type(type), timestamp(timestamp) {}
// static
scoped_refptr<CyclicFrameGenerator> CyclicFrameGenerator::Create() {
base::FilePath test_data_path;
PathService::Get(base::DIR_SOURCE_ROOT, &test_data_path);
test_data_path = test_data_path.Append(FILE_PATH_LITERAL("remoting"));
test_data_path = test_data_path.Append(FILE_PATH_LITERAL("test"));
test_data_path = test_data_path.Append(FILE_PATH_LITERAL("data"));
std::vector<scoped_ptr<webrtc::DesktopFrame>> frames;
frames.push_back(
LoadDesktopFrameFromPng(test_data_path.AppendASCII("test_frame1.png")));
frames.push_back(
LoadDesktopFrameFromPng(test_data_path.AppendASCII("test_frame2.png")));
return new CyclicFrameGenerator(std::move(frames));
}
CyclicFrameGenerator::CyclicFrameGenerator(
std::vector<scoped_ptr<webrtc::DesktopFrame>> reference_frames)
: reference_frames_(std::move(reference_frames)),
clock_(&default_tick_clock_),
started_time_(clock_->NowTicks()) {
CHECK(!reference_frames_.empty());
screen_size_ = reference_frames_[0]->size();
for (const auto& frame : reference_frames_) {
CHECK(screen_size_.equals(frame->size()))
<< "All reference frames should have the same size.";
}
}
CyclicFrameGenerator::~CyclicFrameGenerator() {}
void CyclicFrameGenerator::SetTickClock(base::TickClock* tick_clock) {
clock_ = tick_clock;
started_time_ = clock_->NowTicks();
}
scoped_ptr<webrtc::DesktopFrame> CyclicFrameGenerator::GenerateFrame(
webrtc::SharedMemoryFactory* shared_memory_factory) {
base::TimeTicks now = clock_->NowTicks();
int reference_frame =
((now - started_time_) / frame_cycle_period_) % reference_frames_.size();
bool cursor_state = ((now - started_time_) / cursor_blink_period_) % 2;
scoped_ptr<webrtc::DesktopFrame> frame(
new webrtc::BasicDesktopFrame(screen_size_));
frame->CopyPixelsFrom(*reference_frames_[reference_frame],
webrtc::DesktopVector(),
webrtc::DesktopRect::MakeSize(screen_size_));
// Render the cursor.
webrtc::DesktopRect cursor_rect =
webrtc::DesktopRect::MakeXYWH(20, 20, 2, 20);
if (cursor_state) {
DrawRect(frame.get(), cursor_rect, 0);
}
if (last_reference_frame_ != reference_frame) {
// The whole frame has changed.
frame->mutable_updated_region()->AddRect(
webrtc::DesktopRect::MakeSize(screen_size_));
last_frame_type_ = FrameType::FULL;
} else if (last_cursor_state_ != cursor_state) {
// Cursor state has changed.
frame->mutable_updated_region()->AddRect(cursor_rect);
last_frame_type_ = FrameType::CURSOR;
} else {
// No changes.
last_frame_type_ = FrameType::EMPTY;
}
// Increment frame_id for non-empty frames.
int frame_id = (last_frame_type_ == FrameType::EMPTY) ? last_frame_id_
: last_frame_id_ + 1;
// Render barcode.
if (draw_barcode_) {
uint32_t value = static_cast<uint32_t>(frame_id);
CHECK(value < (1U << kBarcodeBits));
for (int i = 0; i < kBarcodeBits; ++i) {
DrawRect(frame.get(), webrtc::DesktopRect::MakeXYWH(i * kBarcodeCellWidth,
0, kBarcodeCellWidth,
kBarcodeCellHeight),
(value & 1) ? 0xffffffff : 0xff000000);
value >>= 1;
}
if (frame_id != last_frame_id_) {
frame->mutable_updated_region()->AddRect(webrtc::DesktopRect::MakeXYWH(
0, 0, kBarcodeCellWidth * kBarcodeBits, kBarcodeCellHeight));
}
}
// Add non-empty frames to |generated_frames_info_|.
if (last_frame_type_ != FrameType::EMPTY) {
generated_frames_info_[frame_id] =
FrameInfo(frame_id, last_frame_type_, clock_->NowTicks());
}
last_reference_frame_ = reference_frame;
last_cursor_state_ = cursor_state;
last_frame_id_ = frame_id;
return frame;
}
CyclicFrameGenerator::FrameInfo CyclicFrameGenerator::IdentifyFrame(
webrtc::DesktopFrame* frame) {
CHECK(draw_barcode_);
int frame_id = 0;
for (int i = kBarcodeBits - 1; i >= 0; --i) {
// Sample barcode in the center of the cell for each bit.
int x = i * kBarcodeCellWidth + kBarcodeCellWidth / 2;
int y = kBarcodeCellHeight / 2;
uint8_t* data = (frame->data() + y * frame->stride() +
x * webrtc::DesktopFrame::kBytesPerPixel);
int b = data[0];
int g = data[1];
int r = data[2];
bool bit = 0;
if (b > kBarcodeWhiteThreshold && g > kBarcodeWhiteThreshold &&
r > kBarcodeWhiteThreshold) {
bit = 1;
} else if (b < kBarcodeBlackThreshold && g < kBarcodeBlackThreshold &&
r < kBarcodeBlackThreshold) {
bit = 0;
} else {
LOG(FATAL) << "Invalid barcode.";
}
frame_id <<= 1;
if (bit)
frame_id |= 1;
}
if (!generated_frames_info_.count(frame_id))
LOG(FATAL) << "Barcode contains unknown frame_id: " << frame_id;
return generated_frames_info_[frame_id];
}
} // namespace test
} // namespace remoting
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