Refactoring: Use enum for RtpPayloadType.

media/cast/net/cast_transport_config.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_CAST_NET_CAST_TRANSPORT_CONFIG_H_
 #define MEDIA_CAST_NET_CAST_TRANSPORT_CONFIG_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 12 matching lines @@
   CODEC_UNKNOWN,
   CODEC_AUDIO_OPUS,
   CODEC_AUDIO_PCM16,
   CODEC_AUDIO_AAC,
   CODEC_VIDEO_FAKE,
   CODEC_VIDEO_VP8,
   CODEC_VIDEO_H264,
   CODEC_LAST = CODEC_VIDEO_H264
 };
 
+// Describes the content being transported over RTP streams.
+enum class RtpPayloadType {
+  UNKNOWN = -1,
+
+  // Cast Streaming will encode raw audio frames using one of its available
+  // codec implementations, and transport encoded data in the RTP stream.
+  FIRST = 96,
+  AUDIO_OPUS = 96,
+  AUDIO_AAC = 97,
+  AUDIO_PCM16 = 98,
+
+  // Audio frame data is not modified, and should be transported reliably and
+  // in-sequence. No assumptions about the data can be made.
+  REMOTE_AUDIO = 99,
+
+  AUDIO_LAST = REMOTE_AUDIO,
+
+  // Cast Streaming will encode raw video frames using one of its available
+  // codec implementations, and transport encoded data in the RTP stream.
+  VIDEO_VP8 = 100,
+  VIDEO_H264 = 101,
+
+  // Video frame data is not modified, and should be transported reliably and
+  // in-sequence. No assumptions about the data can be made.
+  REMOTE_VIDEO = 102,
+
+  LAST = REMOTE_VIDEO
+};
+
 struct CastTransportRtpConfig {
   CastTransportRtpConfig();
   ~CastTransportRtpConfig();
 
   // Identifier refering to this sender.
   uint32_t ssrc;
 
   // Identifier for incoming RTCP traffic.
   uint32_t feedback_ssrc;
 
   // RTP payload type enum: Specifies the type/encoding of frame data.
-  int rtp_payload_type;
+  RtpPayloadType rtp_payload_type;
 
   // The AES crypto key and initialization vector.  Each of these strings
   // contains the data in binary form, of size kAesKeySize.  If they are empty
   // strings, crypto is not being used.
   std::string aes_key;
   std::string aes_iv_mask;
 };
 
 // A combination of metadata and data for one encoded frame.  This can contain
 // audio data or video data or other.
@@ skipping 132 matching lines @@
          lhs.ntp_fraction == rhs.ntp_fraction &&
          lhs.rtp_timestamp == rhs.rtp_timestamp &&
          lhs.send_packet_count == rhs.send_packet_count &&
          lhs.send_octet_count == rhs.send_octet_count;
 }
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_CAST_TRANSPORT_CONFIG_H_