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// Copyright (c) 2012 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 "content/browser/media/capture/web_contents_capture_util.h"
#include "base/basictypes.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
namespace content {
bool WebContentsCaptureUtil::IsWebContentsDeviceId(
const std::string& device_id) {
int ignored;
return ExtractTabCaptureTarget(device_id, &ignored, &ignored);
}
bool WebContentsCaptureUtil::ExtractTabCaptureTarget(
const std::string& device_id_param,
int* render_process_id,
int* main_render_frame_id) {
static const char kDeviceScheme[] = "web-contents-media-stream://";
if (!base::StartsWith(device_id_param, kDeviceScheme,
base::CompareCase::SENSITIVE))
return false;
const std::string device_id = device_id_param.substr(
arraysize(kDeviceScheme) - 1);
const size_t sep_pos = device_id.find(':');
if (sep_pos == std::string::npos)
return false;
const base::StringPiece component1(device_id.data(), sep_pos);
size_t end_pos = device_id.find('?');
if (end_pos == std::string::npos)
end_pos = device_id.length();
const base::StringPiece component2(device_id.data() + sep_pos + 1,
end_pos - sep_pos - 1);
return (base::StringToInt(component1, render_process_id) &&
base::StringToInt(component2, main_render_frame_id));
}
bool WebContentsCaptureUtil::IsAutoThrottlingOptionSet(
const std::string& device_id) {
if (!IsWebContentsDeviceId(device_id))
return false;
// Find the option part of the string and just do a naive string compare since
// there are no other options in the |device_id| to account for (at the time
// of this writing).
const size_t option_pos = device_id.find('?');
if (option_pos == std::string::npos)
return false;
const base::StringPiece component(device_id.data() + option_pos,
device_id.length() - option_pos);
static const char kEnableFlag[] = "?throttling=auto";
return component.compare(kEnableFlag) == 0;
}
} // namespace content
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