Add FlexfecReceiveStream.

webrtc/config.h

 /*
  *  Copyright (c) 2013 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.
  */
 
 // TODO(pbos): Move Config from common.h to here.
 
 #ifndef WEBRTC_CONFIG_H_
 #define WEBRTC_CONFIG_H_
 
 #include <string>
 #include <vector>
 
+#include "webrtc/base/basictypes.h"
 #include "webrtc/base/optional.h"
 #include "webrtc/base/refcount.h"
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/common_types.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 // Settings for NACK, see RFC 4585 for details.
 struct NackConfig {
@@ skipping 17 matching lines @@
   // Payload type used for ULPFEC packets.
   int ulpfec_payload_type;
 
   // Payload type used for RED packets.
   int red_payload_type;
 
   // RTX payload type for RED payload.
   int red_rtx_payload_type;
 };
 
+// Settings for FlexFEC forward error correction.
+// Set the payload type to '-1' to disable.
+struct FlexfecConfig {
+  FlexfecConfig()
+      : flexfec_payload_type(-1), flexfec_ssrc(0), protected_media_ssrc(0) {}
+  std::string ToString() const;
+
+  // Payload type of FlexFEC.
+  int flexfec_payload_type;
+
+  // SSRC of FlexFEC stream.
+  uint32_t flexfec_ssrc;
+
+  // SSRC of the single media stream that is protected.
+  uint32_t protected_media_ssrc;

[stefan-webrtc, 2016/10/17 17:56:04]

Should we make this a vector already now to avoid having to change the API
later?

[brandtr, 2016/10/18 14:31:18]

Yes, that seems like a good idea. Done.

+};
+
 // RTP header extension, see RFC 5285.
 struct RtpExtension {
   RtpExtension() : id(0) {}
   RtpExtension(const std::string& uri, int id) : uri(uri), id(id) {}
   std::string ToString() const;
   bool operator==(const RtpExtension& rhs) const {
     return uri == rhs.uri && id == rhs.id;
   }
   static bool IsSupportedForAudio(const std::string& uri);
   static bool IsSupportedForVideo(const std::string& uri);
@@ skipping 165 matching lines @@
 
 class DecoderSpecificSettings {
  public:
   virtual ~DecoderSpecificSettings() {}
   rtc::Optional<VideoDecoderH264Settings> h264_extra_settings;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CONFIG_H_