routing/speed_camera_ser_des.cpp - master - githubmirror/omim

routing/speed_camera_ser_des.cpp

55 строк2 KB

Vladimir Byko-Ianko

[routing] Maxspeed section format changed. elias_fano variant.

23 ноя 2018, 17:58

23 ноя 2018, 17:589772522

#include "routing/speed_camera_ser_des.hpp"

#include "coding/point_coding.hpp"
#include "coding/varint.hpp"

#include "base/assert.hpp"

namespace routing
{
uint32_t constexpr SpeedCameraMwmHeader::kLatestVersion;

void SerializeSpeedCamera(FileWriter & writer, routing::SpeedCameraMetadata const & data,
                          uint32_t & prevFeatureId)
{
  CHECK_EQUAL(data.m_ways.size(), 1, ());

  auto const & way = data.m_ways.back();
  auto featureId = way.m_featureId;
  CHECK_GREATER_OR_EQUAL(featureId, prevFeatureId, ());

  uint32_t const saveFeatureId = featureId;
  featureId -= prevFeatureId;  // delta coding
  prevFeatureId = saveFeatureId;

  WriteVarUint(writer, featureId);
  WriteVarUint(writer, way.m_segmentId);

  uint32_t const coef = DoubleToUint32(way.m_coef, 0.0 /* min */, 1.0 /* max */, 32 /* bits */);
  WriteToSink(writer, coef);

  WriteToSink(writer, data.m_maxSpeedKmPH);

  auto const direction = static_cast<uint8_t>(data.m_direction);
  WriteToSink(writer, direction);

  // TODO (@gmoryes) add implementation of this feature
  // List of time conditions will be saved here. For example:
  //    "maxspeed:conditional": "60 @ (23:00-05:00)"
  //                       or
  //    "60 @ (Su 00:00-24:00; Mo-Sa 00:00-06:00,22:30-24:00)"
  // We store number of conditions first, then each condition in 3 bytes:
  //    1. Type of condition (day, hour, month) + start value of range.
  //    2. End value of range.
  //    3. SpeedMacro in this time range.
  WriteVarInt(writer, 0 /* number of time conditions */);
}

std::string DebugPrint(SegmentCoord const & segment)
{
  std::stringstream ss;
  ss << "SegmentCoord [ m_featureId == " << segment.m_featureId
     << ", m_segmentId == " << segment.m_segmentId << "]";
  return ss.str();
}
}  // namespace routing