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1 /* | 1 /* |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 // This file contains structures for describing SSRCs from a media source such | 11 // This file contains structures for describing SSRCs from a media source such |
12 // as a MediaStreamTrack when it is sent across an RTP session. Multiple media | 12 // as a MediaStreamTrack when it is sent across an RTP session. Multiple media |
13 // sources may be sent across the same RTP session, each of them will be | 13 // sources may be sent across the same RTP session, each of them will be |
14 // described by one StreamParams object | 14 // described by one StreamParams object |
15 // SsrcGroup is used to describe the relationship between the SSRCs that | 15 // SsrcGroup is used to describe the relationship between the SSRCs that |
16 // are used for this media source. | 16 // are used for this media source. |
17 // E.x: Consider a source that is sent as 3 simulcast streams | 17 // E.x: Consider a source that is sent as 3 simulcast streams |
18 // Let the simulcast elements have SSRC 10, 20, 30. | 18 // Let the simulcast elements have SSRC 10, 20, 30. |
19 // Let each simulcast element use FEC and let the protection packets have | 19 // Let each simulcast element use FEC and let the protection packets have |
20 // SSRC 11,21,31. | 20 // SSRC 11,21,31. |
21 // To describe this 4 SsrcGroups are needed, | 21 // To describe this 4 SsrcGroups are needed, |
22 // StreamParams would then contain ssrc = {10,11,20,21,30,31} and | 22 // StreamParams would then contain ssrc = {10,11,20,21,30,31} and |
23 // ssrc_groups = {{SIM,{10,20,30}, {FEC,{10,11}, {FEC, {20,21}, {FEC {30,31}}} | 23 // ssrc_groups = {{SIM,{10,20,30}, {FEC,{10,11}, {FEC, {20,21}, {FEC {30,31}}} |
24 // Please see RFC 5576. | 24 // Please see RFC 5576. |
25 | 25 |
26 #ifndef WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ | 26 #ifndef WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ |
27 #define WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ | 27 #define WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ |
28 | 28 |
| 29 #include <stdint.h> |
| 30 |
29 #include <algorithm> | 31 #include <algorithm> |
30 #include <set> | 32 #include <set> |
31 #include <string> | 33 #include <string> |
32 #include <vector> | 34 #include <vector> |
33 | 35 |
34 #include "webrtc/base/basictypes.h" | |
35 #include "webrtc/base/constructormagic.h" | 36 #include "webrtc/base/constructormagic.h" |
36 | 37 |
37 namespace cricket { | 38 namespace cricket { |
38 | 39 |
39 extern const char kFecSsrcGroupSemantics[]; | 40 extern const char kFecSsrcGroupSemantics[]; |
40 extern const char kFecFrSsrcGroupSemantics[]; | 41 extern const char kFecFrSsrcGroupSemantics[]; |
41 extern const char kFidSsrcGroupSemantics[]; | 42 extern const char kFidSsrcGroupSemantics[]; |
42 extern const char kSimSsrcGroupSemantics[]; | 43 extern const char kSimSsrcGroupSemantics[]; |
43 | 44 |
44 struct SsrcGroup { | 45 struct SsrcGroup { |
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307 bool IsOneSsrcStream(const StreamParams& sp); | 308 bool IsOneSsrcStream(const StreamParams& sp); |
308 | 309 |
309 // Checks if |sp| defines parameters for one Simulcast stream. There may be RTX | 310 // Checks if |sp| defines parameters for one Simulcast stream. There may be RTX |
310 // streams associated with the simulcast streams. Leaving as non-static so we | 311 // streams associated with the simulcast streams. Leaving as non-static so we |
311 // can test this function. | 312 // can test this function. |
312 bool IsSimulcastStream(const StreamParams& sp); | 313 bool IsSimulcastStream(const StreamParams& sp); |
313 | 314 |
314 } // namespace cricket | 315 } // namespace cricket |
315 | 316 |
316 #endif // WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ | 317 #endif // WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ |
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