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:
FrameIdWrapHelper()61 FrameIdWrapHelper()
62 : largest_frame_id_seen_(kStartFrameId) {}
63
MapTo32bitsFrameId(const uint8 over_the_wire_frame_id)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
GetVideoRtpTimestamp(const base::TimeTicks & time_ticks)87 inline uint32 GetVideoRtpTimestamp(const base::TimeTicks& time_ticks) {
88 base::TimeTicks zero_time;
89 base::TimeDelta recorded_delta = time_ticks - zero_time;
90 // Timestamp is in 90 KHz for video.
91 return static_cast<uint32>(recorded_delta.InMilliseconds() * 90);
92 }
93
94 } // namespace cast
95 } // namespace media
96
97 #endif // MEDIA_CAST_NET_CAST_TRANSPORT_DEFINES_H_
98