media/cast/net/cast_transport_defines.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_CAST_NET_CAST_TRANSPORT_DEFINES_H_
   6 #define MEDIA_CAST_NET_CAST_TRANSPORT_DEFINES_H_
   7
   8 #include <stdint.h>
   9
  10 #include <map>
  11 #include <set>
  12 #include <string>
  13
  14 #include "base/basictypes.h"
  15 #include "base/time/time.h"
  16
  17 namespace media {
  18 namespace cast {
  19
  20 // TODO(mikhal): Implement and add more types.
  21 enum CastTransportStatus {
  22   TRANSPORT_AUDIO_UNINITIALIZED = 0,
  23   TRANSPORT_VIDEO_UNINITIALIZED,
  24   TRANSPORT_AUDIO_INITIALIZED,
  25   TRANSPORT_VIDEO_INITIALIZED,
  26   TRANSPORT_INVALID_CRYPTO_CONFIG,
  27   TRANSPORT_SOCKET_ERROR,
  28   CAST_TRANSPORT_STATUS_LAST = TRANSPORT_SOCKET_ERROR
  29 };
  30
  31 const size_t kMaxIpPacketSize = 1500;
  32 // Each uint16 represents one packet id within a cast frame.
  33 typedef std::set<uint16> PacketIdSet;
  34 // Each uint8 represents one cast frame.
  35 typedef std::map<uint8, PacketIdSet> MissingFramesAndPacketsMap;
  36
  37 // Rtcp defines.
  38
  39 enum RtcpPacketFields {
  40   kPacketTypeLow = 194,  // SMPTE time-code mapping.
  41   kPacketTypeSenderReport = 200,
  42   kPacketTypeReceiverReport = 201,
  43   kPacketTypeApplicationDefined = 204,
  44   kPacketTypeGenericRtpFeedback = 205,
  45   kPacketTypePayloadSpecific = 206,
  46   kPacketTypeXr = 207,
  47   kPacketTypeHigh = 210,  // Port Mapping.
  48 };
  49
  50 // Each uint16 represents one packet id within a cast frame.
  51 typedef std::set<uint16> PacketIdSet;
  52 // Each uint8 represents one cast frame.
  53 typedef std::map<uint8, PacketIdSet> MissingFramesAndPacketsMap;
  54
  55 class FrameIdWrapHelperTest;
  56
  57 // TODO(miu): UGLY IN-LINE DEFINITION IN HEADER FILE!  Move to appropriate
  58 // location, separated into .h and .cc files.
  59 class FrameIdWrapHelper {
  60  public:
  61   FrameIdWrapHelper()
  62       : largest_frame_id_seen_(kStartFrameId) {}
  63
  64   uint32 MapTo32bitsFrameId(const uint8 over_the_wire_frame_id) {
  65     uint32 ret = (largest_frame_id_seen_ & ~0xff) | over_the_wire_frame_id;
  66     // Add 1000 to both sides to avoid underflows.
  67     if (1000 + ret - largest_frame_id_seen_ > 1000 + 127) {
  68       ret -= 0x100;
  69     } else if (1000 + ret - largest_frame_id_seen_ < 1000 - 128) {
  70       ret += 0x100;
  71     }
  72     if (1000 + ret - largest_frame_id_seen_ > 1000) {
  73       largest_frame_id_seen_ = ret;
  74     }
  75     return ret;
  76   }
  77
  78  private:
  79   friend class FrameIdWrapHelperTest;
  80   static const uint32 kStartFrameId = UINT32_C(0xffffffff);
  81
  82   uint32 largest_frame_id_seen_;
  83
  84   DISALLOW_COPY_AND_ASSIGN(FrameIdWrapHelper);
  85 };
  86
  87 }  // namespace cast
  88 }  // namespace media
  89
  90 #endif  // MEDIA_CAST_NET_CAST_TRANSPORT_DEFINES_H_