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
12namespace content {
13
14bool WebContentsCaptureUtil::IsWebContentsDeviceId(
15    const std::string& device_id) {
16  int ignored;
17  return ExtractTabCaptureTarget(device_id, &ignored, &ignored);
18}
19
20bool 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
44