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gerrit.openfyde.cn / webrtc.googlesource.com / src / 28e20752806a492f5a6a5d343c02f9556f39b1cd / . / talk / media / base / constants.h
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henrike@webrtc.org28e20752013-07-10 00:45:36 +0000[diff] [blame^]1/*
2 * libjingle
3 * Copyright 2012 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
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.
15 *
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.
26 */
27
28#ifndef TALK_MEDIA_BASE_CONSTANTS_H_
29#define TALK_MEDIA_BASE_CONSTANTS_H_
30
31#include <string>
32
33// This file contains constants related to media.
34
35namespace cricket {
36
37extern const int kVideoCodecClockrate;
38extern const int kDataCodecClockrate;
39extern const int kDataMaxBandwidth; // bps
40
41// Default CPU thresholds.
42extern const float kHighSystemCpuThreshold;
43extern const float kLowSystemCpuThreshold;
44extern const float kProcessCpuThreshold;
45
46extern const char* kRtxCodecName;
47
48// Codec parameters
49extern const int kWildcardPayloadType;
50extern const char* kCodecParamAssociatedPayloadType;
51
52extern const char* kOpusCodecName;
53
54// Attribute parameters
55extern const char* kCodecParamPTime;
56extern const char* kCodecParamMaxPTime;
57// fmtp parameters
58extern const char* kCodecParamMinPTime;
59extern const char* kCodecParamSPropStereo;
60extern const char* kCodecParamStereo;
61extern const char* kCodecParamUseInbandFec;
62extern const char* kCodecParamSctpProtocol;
63extern const char* kCodecParamSctpStreams;
64
65extern const char* kParamValueTrue;
66// Parameters are stored as parameter/value pairs. For parameters who do not
67// have a value, |kParamValueEmpty| should be used as value.
68extern const char* kParamValueEmpty;
69
70// opus parameters.
71// Default value for maxptime according to
72// http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
73extern const int kOpusDefaultMaxPTime;
74extern const int kOpusDefaultPTime;
75extern const int kOpusDefaultMinPTime;
76extern const int kOpusDefaultSPropStereo;
77extern const int kOpusDefaultStereo;
78extern const int kOpusDefaultUseInbandFec;
79// Prefered values in this code base. Note that they may differ from the default
80// values in http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03
81// Only frames larger or equal to 10 ms are currently supported in this code
82// base.
83extern const int kPreferredMaxPTime;
84extern const int kPreferredMinPTime;
85extern const int kPreferredSPropStereo;
86extern const int kPreferredStereo;
87extern const int kPreferredUseInbandFec;
88
89// rtcp-fb messages according to RFC 4585
90extern const char* kRtcpFbParamNack;
91// rtcp-fb messages according to
92// http://tools.ietf.org/html/draft-alvestrand-rmcat-remb-00
93extern const char* kRtcpFbParamRemb;
94// ccm submessages according to RFC 5104
95extern const char* kRtcpFbParamCcm;
96extern const char* kRtcpFbCcmParamFir;
97// Google specific parameters
98extern const char* kCodecParamMaxBitrate;
99extern const char* kCodecParamMinBitrate;
100extern const char* kCodecParamMaxQuantization;
101
102// We put the data codec names here so callers of
103// DataEngine::CreateChannel don't have to import rtpdataengine.h or
104// sctpdataengine.h to get the codec names they want to pass in.
105extern const int kGoogleRtpDataCodecId;
106extern const char kGoogleRtpDataCodecName[];
107
108// TODO(pthatcher): Find an id that won't conflict with anything. On
109// the other hand, it really shouldn't matter since the id won't be
110// used on the wire.
111extern const int kGoogleSctpDataCodecId;
112extern const char kGoogleSctpDataCodecName[];
113
114extern const char kComfortNoiseCodecName[];
115
116} // namespace cricket
117
118#endif // TALK_MEDIA_BASE_CONSTANTS_H_