media/audio/point.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/audio/point.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/string_split.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/stringprintf.h"
  12
  13 namespace media {
  14
  15 std::string PointsToString(const std::vector<Point>& points) {
  16   std::string points_string;
  17   if (!points.empty()) {
  18     for (size_t i = 0; i < points.size() - 1; ++i) {
  19       points_string.append(points[i].ToString());
  20       points_string.append(", ");
  21     }
  22     points_string.append(points.back().ToString());
  23   }
  24   return points_string;
  25 }
  26
  27 std::vector<Point> ParsePointsFromString(const std::string& points_string) {
  28   std::vector<Point> points;
  29   if (points_string.empty())
  30     return points;
  31
  32   const auto& tokens =
  33       base::SplitString(points_string, base::kWhitespaceASCII,
  34                         base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
  35   if (tokens.size() < 3 || tokens.size() % 3 != 0) {
  36     LOG(ERROR) << "Malformed points string: " << points_string;
  37     return points;
  38   }
  39
  40   std::vector<float> float_tokens;
  41   float_tokens.reserve(tokens.size());
  42   for (const auto& token : tokens) {
  43     double float_token;
  44     if (!base::StringToDouble(token, &float_token)) {
  45       LOG(ERROR) << "Unable to convert token=" << token
  46                  << " to double from points string: " << points_string;
  47       return points;
  48     }
  49     float_tokens.push_back(float_token);
  50   }
  51
  52   points.reserve(float_tokens.size() / 3);
  53   for (size_t i = 0; i < float_tokens.size(); i += 3) {
  54     points.push_back(
  55         Point(float_tokens[i + 0], float_tokens[i + 1], float_tokens[i + 2]));
  56   }
  57
  58   return points;
  59 }
  60
  61 }  // namespace media