content/browser/media/capture/web_contents_capture_util.cc

   1 // Copyright (c) 2012 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 "content/browser/media/capture/web_contents_capture_util.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/string_piece.h"
  10 #include "base/strings/string_util.h"
  11
  12 namespace content {
  13
  14 bool WebContentsCaptureUtil::IsWebContentsDeviceId(
  15     const std::string& device_id) {
  16   int ignored;
  17   return ExtractTabCaptureTarget(device_id, &ignored, &ignored);
  18 }
  19
  20 bool WebContentsCaptureUtil::ExtractTabCaptureTarget(
  21     const std::string& device_id_param,
  22     int* render_process_id,
  23     int* main_render_frame_id) {
  24   static const char kDeviceScheme[] = "web-contents-media-stream://";
  25   if (!StartsWithASCII(device_id_param, kDeviceScheme, true))
  26     return false;
  27
  28   const std::string device_id = device_id_param.substr(
  29       arraysize(kDeviceScheme) - 1);
  30
  31   const size_t sep_pos = device_id.find(':');
  32   if (sep_pos == std::string::npos)
  33     return false;
  34
  35   const base::StringPiece component1(device_id.data(), sep_pos);
  36   const base::StringPiece component2(device_id.data() + sep_pos + 1,
  37                                      device_id.length() - sep_pos - 1);
  38
  39   return (base::StringToInt(component1, render_process_id) &&
  40           base::StringToInt(component2, main_render_frame_id));
  41 }
  42
  43 }  // namespace content