3 * Copyright 2012 Google Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef TALK_MEDIA_BASE_CONSTANTS_H_
29 #define TALK_MEDIA_BASE_CONSTANTS_H_
33 // This file contains constants related to media.
37 extern const int kVideoCodecClockrate;
38 extern const int kDataCodecClockrate;
39 extern const int kDataMaxBandwidth; // bps
41 // Default CPU thresholds.
42 extern const float kHighSystemCpuThreshold;
43 extern const float kLowSystemCpuThreshold;
44 extern const float kProcessCpuThreshold;
46 extern const char kRtxCodecName[];
49 extern const int kWildcardPayloadType;
50 extern const char kCodecParamAssociatedPayloadType[];
52 extern const char kOpusCodecName[];
54 // Attribute parameters
55 extern const char kCodecParamPTime[];
56 extern const char kCodecParamMaxPTime[];
58 extern const char kCodecParamMinPTime[];
59 extern const char kCodecParamSPropStereo[];
60 extern const char kCodecParamStereo[];
61 extern const char kCodecParamUseInbandFec[];
62 extern const char kCodecParamMaxAverageBitrate[];
63 extern const char kCodecParamSctpProtocol[];
64 extern const char kCodecParamSctpStreams[];
66 extern const char kParamValueTrue[];
67 // Parameters are stored as parameter/value pairs. For parameters who do not
68 // have a value, |kParamValueEmpty| should be used as value.
69 extern const char kParamValueEmpty[];
72 // Default value for maxptime according to
73 // http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
74 extern const int kOpusDefaultMaxPTime;
75 extern const int kOpusDefaultPTime;
76 extern const int kOpusDefaultMinPTime;
77 extern const int kOpusDefaultSPropStereo;
78 extern const int kOpusDefaultStereo;
79 extern const int kOpusDefaultUseInbandFec;
80 // Prefered values in this code base. Note that they may differ from the default
81 // values in http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
82 // Only frames larger or equal to 10 ms are currently supported in this code
84 extern const int kPreferredMaxPTime;
85 extern const int kPreferredMinPTime;
86 extern const int kPreferredSPropStereo;
87 extern const int kPreferredStereo;
88 extern const int kPreferredUseInbandFec;
90 // rtcp-fb messages according to RFC 4585
91 extern const char kRtcpFbParamNack[];
92 extern const char kRtcpFbNackParamPli[];
93 // rtcp-fb messages according to
94 // http://tools.ietf.org/html/draft-alvestrand-rmcat-remb-00
95 extern const char kRtcpFbParamRemb[];
96 // ccm submessages according to RFC 5104
97 extern const char kRtcpFbParamCcm[];
98 extern const char kRtcpFbCcmParamFir[];
99 // Google specific parameters
100 extern const char kCodecParamMaxBitrate[];
101 extern const char kCodecParamMinBitrate[];
102 extern const char kCodecParamStartBitrate[];
103 extern const char kCodecParamMaxQuantization[];
104 extern const char kCodecParamPort[];
106 // We put the data codec names here so callers of
107 // DataEngine::CreateChannel don't have to import rtpdataengine.h or
108 // sctpdataengine.h to get the codec names they want to pass in.
109 extern const int kGoogleRtpDataCodecId;
110 extern const char kGoogleRtpDataCodecName[];
112 // TODO(pthatcher): Find an id that won't conflict with anything. On
113 // the other hand, it really shouldn't matter since the id won't be
115 extern const int kGoogleSctpDataCodecId;
116 extern const char kGoogleSctpDataCodecName[];
118 extern const char kComfortNoiseCodecName[];
120 // Extension header for audio levels, as defined in
121 // http://tools.ietf.org/html/draft-ietf-avtext-client-to-mixer-audio-level-03
122 extern const int kRtpAudioLevelHeaderExtensionDefaultId;
123 extern const char kRtpAudioLevelHeaderExtension[];
125 // Extension header for RTP timestamp offset, see RFC 5450 for details:
126 // http://tools.ietf.org/html/rfc5450
127 extern const int kRtpTimestampOffsetHeaderExtensionDefaultId;
128 extern const char kRtpTimestampOffsetHeaderExtension[];
130 // Extension header for absolute send time, see url for details:
131 // http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
132 extern const int kRtpAbsoluteSenderTimeHeaderExtensionDefaultId;
133 extern const char kRtpAbsoluteSenderTimeHeaderExtension[];
135 extern const int kNumDefaultUnsignalledVideoRecvStreams;
136 } // namespace cricket
138 #endif // TALK_MEDIA_BASE_CONSTANTS_H_