Move StreamConfig into its own file

webrtc/logging/rtc_event_log/rtc_stream_config.h

+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_LOGGING_RTC_EVENT_LOG_RTC_STREAM_CONFIG_H_
+#define WEBRTC_LOGGING_RTC_EVENT_LOG_RTC_STREAM_CONFIG_H_
+
+#include <string>
+#include <vector>
+
+#include "webrtc/api/rtpparameters.h"
+#include "webrtc/common_types.h"
+
+namespace webrtc {
+namespace rtclog {
+
+struct StreamConfig {
+  StreamConfig();
+  ~StreamConfig();
+
+  uint32_t local_ssrc = 0;
+  uint32_t remote_ssrc = 0;
+  uint32_t rtx_ssrc = 0;
+  std::string rsid;
+
+  bool remb = false;
+  std::vector<RtpExtension> rtp_extensions;
+
+  RtcpMode rtcp_mode = RtcpMode::kReducedSize;
+
+  struct Codec {
+    Codec(const std::string& payload_name,
+          int payload_type,
+          int rtx_payload_type);
+
+    std::string payload_name;
+    int payload_type;
+    int rtx_payload_type;
+  };
+
+  std::vector<Codec> codecs;
+};
+
+}  // namespace rtclog
+}  // namespace webrtc
+
+#endif  // WEBRTC_LOGGING_RTC_EVENT_LOG_RTC_STREAM_CONFIG_H_