Move RtpExtension to api/ directory and config.h/.cc to call/.

webrtc/call/rtp_config.h

Index: webrtc/call/rtp_config.h
diff --git a/webrtc/call/rtp_config.h b/webrtc/call/rtp_config.h
new file mode 100644
index 0000000000000000000000000000000000000000..f33103dfb5495d8bd846ded837e56e6c18b6b32a
--- /dev/null
+++ b/webrtc/call/rtp_config.h
@@ -0,0 +1,48 @@
+/*
+ *  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_CALL_RTP_CONFIG_H_
+#define WEBRTC_CALL_RTP_CONFIG_H_
+
+#include <string>
+
+namespace webrtc {
+// Settings for NACK, see RFC 4585 for details.
+struct NackConfig {
+  NackConfig() : rtp_history_ms(0) {}
+  std::string ToString() const;
+  // Send side: the time RTP packets are stored for retransmissions.
+  // Receive side: the time the receiver is prepared to wait for
+  // retransmissions.
+  // Set to '0' to disable.
+  int rtp_history_ms;
+};
+
+// Settings for ULPFEC forward error correction.
+// Set the payload types to '-1' to disable.
+struct UlpfecConfig {
+  UlpfecConfig()
+      : ulpfec_payload_type(-1),
+        red_payload_type(-1),
+        red_rtx_payload_type(-1) {}
+  std::string ToString() const;
+  bool operator==(const UlpfecConfig& other) const;
+
+  // 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;
+};
+}  // namespace webrtc
+#endif  // WEBRTC_CALL_RTP_CONFIG_H_