Add a virtual beamforming audio device on ChromeOS.

media/audio/point.cc

+// Copyright 2015 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 "media/audio/point.h"
+
+#include "base/logging.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+
+namespace media {
+
+std::string PointsToString(const std::vector<Point>& points) {
+  std::string points_string;
+  if (!points.empty()) {
+    for (size_t i = 0; i < points.size() - 1; ++i) {
+      points_string.append(points[i].ToString());
+      points_string.append(", ");
+    }
+    points_string.append(points.back().ToString());
+  }
+  return points_string;
+}
+
+std::vector<Point> ParsePointsFromString(const std::string& points_string) {
+  std::vector<Point> points;
+  if (points_string.empty())
+    return points;
+
+  const auto& tokens =
+      base::SplitString(points_string, base::kWhitespaceASCII,
+                        base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
+  if (tokens.size() < 3 || tokens.size() % 3 != 0) {
+    LOG(ERROR) << "Malformed points string: " << points_string;
+    return points;
+  }
+
+  std::vector<float> float_tokens;
+  float_tokens.reserve(tokens.size());
+  for (const auto& token : tokens) {
+    double float_token;
+    if (!base::StringToDouble(token, &float_token)) {
+      LOG(ERROR) << "Unable to convert token=" << token
+                 << " to double from points string: " << points_string;
+      return points;
+    }
+    float_tokens.push_back(float_token);
+  }
+
+  points.reserve(float_tokens.size() / 3);
+  for (size_t i = 0; i < float_tokens.size(); i += 3) {
+    points.push_back(
+        Point(float_tokens[i + 0], float_tokens[i + 1], float_tokens[i + 2]));
+  }
+
+  return points;
+}
+
+}  // namespace media