Media Remoting: Add mojo interfaces between browser and extension.

chrome/browser/media/cast_remoting_connector_messaging.cc

-// Copyright 2016 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 "chrome/browser/media/cast_remoting_connector_messaging.h"
-
-#include <stdio.h>
-
-#include <limits>
-
-#include "base/strings/string_number_conversions.h"
-
-const char CastRemotingConnectorMessaging::kMessageFieldSeparator = ':';
-const char CastRemotingConnectorMessaging::kStartRemotingMessageFormat[] =
-    "START_CAST_REMOTING:session=%x";
-const char CastRemotingConnectorMessaging::kStartStreamsMessageFormat[] =
-    "START_CAST_REMOTING_STREAMS:session=%x:audio=%c:video=%c";
-const char
-CastRemotingConnectorMessaging::kStartedStreamsMessageFormatPartial[] =
-    "STARTED_CAST_REMOTING_STREAMS:session=%x";
-const char
-CastRemotingConnectorMessaging::kStartedStreamsMessageAudioIdSpecifier[] =
-    ":audio_stream_id=";
-const char
-CastRemotingConnectorMessaging::kStartedStreamsMessageVideoIdSpecifier[] =
-    ":video_stream_id=";
-const char CastRemotingConnectorMessaging::kStopRemotingMessageFormat[] =
-    "STOP_CAST_REMOTING:session=%x";
-const char CastRemotingConnectorMessaging::kStoppedMessageFormat[] =
-    "STOPPED_CAST_REMOTING:session=%x";
-const char CastRemotingConnectorMessaging::kFailedMessageFormat[] =
-    "FAILED_CAST_REMOTING:session=%x";
-
-// static
-bool CastRemotingConnectorMessaging::IsMessageForSession(
-    const std::string& message, const char* format,
-    unsigned int expected_session_id) {
-  unsigned int session_id;
-  if (sscanf(message.c_str(), format, &session_id) == 1)
-    return session_id == expected_session_id;
-  return false;
-}
-
-// static
-int32_t CastRemotingConnectorMessaging::GetStreamIdFromStartedMessage(
-    base::StringPiece message, base::StringPiece specifier) {
-  auto start = message.find(specifier);
-  if (start == std::string::npos)
-    return -1;
-  start += specifier.size();
-  if (start + 1 >= message.size())
-    return -1; // Must be at least one hex digit following the specifier.
-  const auto length = message.find(kMessageFieldSeparator, start) - start;
-  int parsed_value;
-  if (!base::HexStringToInt(message.substr(start, length), &parsed_value) ||
-      parsed_value < 0 ||
-      parsed_value > std::numeric_limits<int32_t>::max()) {
-    return -1; // Non-hex digits, or outside valid range.
-  }
-  return static_cast<int32_t>(parsed_value);
-}