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.
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11 * this list of conditions and the following disclaimer in the documentation
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14 * derived from this software without specific prior written permission.
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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[];
47 extern const char kRedCodecName[];
48 extern const char kUlpfecCodecName[];
51 extern const int kWildcardPayloadType;
52 extern const char kCodecParamAssociatedPayloadType[];
54 extern const char kOpusCodecName[];
56 // Attribute parameters
57 extern const char kCodecParamPTime[];
58 extern const char kCodecParamMaxPTime[];
60 extern const char kCodecParamMinPTime[];
61 extern const char kCodecParamSPropStereo[];
62 extern const char kCodecParamStereo[];
63 extern const char kCodecParamUseInbandFec[];
64 extern const char kCodecParamMaxAverageBitrate[];
65 extern const char kCodecParamMaxPlaybackRate[];
66 extern const char kCodecParamSctpProtocol[];
67 extern const char kCodecParamSctpStreams[];
69 extern const char kParamValueTrue[];
70 // Parameters are stored as parameter/value pairs. For parameters who do not
71 // have a value, |kParamValueEmpty| should be used as value.
72 extern const char kParamValueEmpty[];
75 // Default value for maxptime according to
76 // http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
77 extern const int kOpusDefaultMaxPTime;
78 extern const int kOpusDefaultPTime;
79 extern const int kOpusDefaultMinPTime;
80 extern const int kOpusDefaultSPropStereo;
81 extern const int kOpusDefaultStereo;
82 extern const int kOpusDefaultUseInbandFec;
83 extern const int kOpusDefaultMaxPlaybackRate;
85 // Prefered values in this code base. Note that they may differ from the default
86 // values in http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
87 // Only frames larger or equal to 10 ms are currently supported in this code
89 extern const int kPreferredMaxPTime;
90 extern const int kPreferredMinPTime;
91 extern const int kPreferredSPropStereo;
92 extern const int kPreferredStereo;
93 extern const int kPreferredUseInbandFec;
95 // rtcp-fb messages according to RFC 4585
96 extern const char kRtcpFbParamNack[];
97 extern const char kRtcpFbNackParamPli[];
98 // rtcp-fb messages according to
99 // http://tools.ietf.org/html/draft-alvestrand-rmcat-remb-00
100 extern const char kRtcpFbParamRemb[];
101 // ccm submessages according to RFC 5104
102 extern const char kRtcpFbParamCcm[];
103 extern const char kRtcpFbCcmParamFir[];
104 // Google specific parameters
105 extern const char kCodecParamMaxBitrate[];
106 extern const char kCodecParamMinBitrate[];
107 extern const char kCodecParamStartBitrate[];
108 extern const char kCodecParamMaxQuantization[];
109 extern const char kCodecParamPort[];
111 // We put the data codec names here so callers of
112 // DataEngine::CreateChannel don't have to import rtpdataengine.h or
113 // sctpdataengine.h to get the codec names they want to pass in.
114 extern const int kGoogleRtpDataCodecId;
115 extern const char kGoogleRtpDataCodecName[];
117 // TODO(pthatcher): Find an id that won't conflict with anything. On
118 // the other hand, it really shouldn't matter since the id won't be
120 extern const int kGoogleSctpDataCodecId;
121 extern const char kGoogleSctpDataCodecName[];
123 extern const char kComfortNoiseCodecName[];
125 // Extension header for audio levels, as defined in
126 // http://tools.ietf.org/html/draft-ietf-avtext-client-to-mixer-audio-level-03
127 extern const int kRtpAudioLevelHeaderExtensionDefaultId;
128 extern const char kRtpAudioLevelHeaderExtension[];
130 // Extension header for RTP timestamp offset, see RFC 5450 for details:
131 // http://tools.ietf.org/html/rfc5450
132 extern const int kRtpTimestampOffsetHeaderExtensionDefaultId;
133 extern const char kRtpTimestampOffsetHeaderExtension[];
135 // Extension header for absolute send time, see url for details:
136 // http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
137 extern const int kRtpAbsoluteSenderTimeHeaderExtensionDefaultId;
138 extern const char kRtpAbsoluteSenderTimeHeaderExtension[];
140 extern const int kNumDefaultUnsignalledVideoRecvStreams;
141 } // namespace cricket
143 #endif // TALK_MEDIA_BASE_CONSTANTS_H_