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      1 #pragma once
      2 
      3 /*
      4  * Copyright (C) 2017 The Android Open Source Project
      5  *
      6  * Licensed under the Apache License, Version 2.0 (the "License");
      7  * you may not use this file except in compliance with the License.
      8  * You may obtain a copy of the License at
      9  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing, software
     13  * distributed under the License is distributed on an "AS IS" BASIS,
     14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15  * See the License for the specific language governing permissions and
     16  * limitations under the License.
     17  */
     18 
     19 #include <array>
     20 #include <cstdint>
     21 #include <utility>
     22 #include <vector>
     23 
     24 #include "common/libs/utils/size_utils.h"
     25 #include "common/libs/tcp_socket/tcp_socket.h"
     26 #include "common/vsoc/lib/screen_region_view.h"
     27 #include "host/libs/config/cuttlefish_config.h"
     28 
     29 namespace cvd {
     30 namespace vnc {
     31 
     32 // TODO(haining) when the hwcomposer gives a sequence number type, use that
     33 // instead. It might just work to replace this class with a type alias
     34 // using StripeSeqNumber = whatever_the_hwcomposer_uses;
     35 class StripeSeqNumber {
     36  public:
     37   StripeSeqNumber() = default;
     38   explicit StripeSeqNumber(std::uint64_t t) : t_{t} {}
     39   bool operator<(const StripeSeqNumber& other) const { return t_ < other.t_; }
     40 
     41   bool operator<=(const StripeSeqNumber& other) const { return t_ <= other.t_; }
     42 
     43  private:
     44   std::uint64_t t_{};
     45 };
     46 
     47 constexpr int32_t kJpegMaxQualityEncoding = -23;
     48 constexpr int32_t kJpegMinQualityEncoding = -32;
     49 
     50 enum class ScreenOrientation { Portrait, Landscape };
     51 constexpr int kNumOrientations = 2;
     52 
     53 struct Stripe {
     54   int index = -1;
     55   std::uint64_t frame_id{};
     56   std::uint16_t x{};
     57   std::uint16_t y{};
     58   std::uint16_t width{};
     59   std::uint16_t stride{};
     60   std::uint16_t height{};
     61   Message raw_data{};
     62   Message jpeg_data{};
     63   StripeSeqNumber seq_number{};
     64   ScreenOrientation orientation{};
     65 };
     66 
     67 inline constexpr int BytesPerPixel() {
     68   return sizeof(vsoc::screen::ScreenRegionView::Pixel);
     69 }
     70 
     71 // The width of the screen regardless of orientation. Does not change.
     72 inline int ActualScreenWidth() {
     73   return vsoc::CuttlefishConfig::Get()->x_res();
     74 }
     75 
     76 // The length of the screen stride regardless of orientation. Does not change.
     77 inline int ActualScreenStride() {
     78   return AlignToPowerOf2(ActualScreenWidth() * BytesPerPixel(), 4);
     79 }
     80 
     81 // The height of the screen regardless of orientation. Does not change.
     82 inline int ActualScreenHeight() {
     83   return vsoc::CuttlefishConfig::Get()->y_res();
     84 }
     85 
     86 inline int ScreenSizeInBytes() {
     87   return ActualScreenWidth() * ActualScreenHeight() * BytesPerPixel();
     88 }
     89 
     90 }  // namespace vnc
     91 }  // namespace cvd
     92