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1 /* | 1 /* |
2 * libjingle | 2 * Copyright 2011 The WebRTC Project Authors. All rights reserved. |
3 * Copyright 2011 Google Inc. | |
4 * | 3 * |
5 * Redistribution and use in source and binary forms, with or without | 4 * Use of this source code is governed by a BSD-style license |
6 * modification, are permitted provided that the following conditions are met: | 5 * that can be found in the LICENSE file in the root of the source |
7 * | 6 * tree. An additional intellectual property rights grant can be found |
8 * 1. Redistributions of source code must retain the above copyright notice, | 7 * in the file PATENTS. All contributing project authors may |
9 * this list of conditions and the following disclaimer. | 8 * be found in the AUTHORS file in the root of the source tree. |
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 */ | 9 */ |
27 | 10 |
28 // 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 |
29 // 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 |
30 // 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 |
31 // described by one StreamParams object | 14 // described by one StreamParams object |
32 // SsrcGroup is used to describe the relationship between the SSRCs that | 15 // SsrcGroup is used to describe the relationship between the SSRCs that |
33 // are used for this media source. | 16 // are used for this media source. |
34 // 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 |
35 // Let the simulcast elements have SSRC 10, 20, 30. | 18 // Let the simulcast elements have SSRC 10, 20, 30. |
36 // 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 |
37 // SSRC 11,21,31. | 20 // SSRC 11,21,31. |
38 // To describe this 4 SsrcGroups are needed, | 21 // To describe this 4 SsrcGroups are needed, |
39 // 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 |
40 // 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}}} |
41 // Please see RFC 5576. | 24 // Please see RFC 5576. |
42 | 25 |
43 #ifndef TALK_MEDIA_BASE_STREAMPARAMS_H_ | 26 #ifndef WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ |
44 #define TALK_MEDIA_BASE_STREAMPARAMS_H_ | 27 #define WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ |
45 | 28 |
46 #include <algorithm> | 29 #include <algorithm> |
47 #include <set> | 30 #include <set> |
48 #include <string> | 31 #include <string> |
49 #include <vector> | 32 #include <vector> |
50 | 33 |
51 #include "webrtc/base/basictypes.h" | 34 #include "webrtc/base/basictypes.h" |
52 #include "webrtc/base/constructormagic.h" | 35 #include "webrtc/base/constructormagic.h" |
53 | 36 |
54 namespace cricket { | 37 namespace cricket { |
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335 // we can test this function. | 318 // we can test this function. |
336 bool IsOneSsrcStream(const StreamParams& sp); | 319 bool IsOneSsrcStream(const StreamParams& sp); |
337 | 320 |
338 // Checks if |sp| defines parameters for one Simulcast stream. There may be RTX | 321 // Checks if |sp| defines parameters for one Simulcast stream. There may be RTX |
339 // streams associated with the simulcast streams. Leaving as non-static so we | 322 // streams associated with the simulcast streams. Leaving as non-static so we |
340 // can test this function. | 323 // can test this function. |
341 bool IsSimulcastStream(const StreamParams& sp); | 324 bool IsSimulcastStream(const StreamParams& sp); |
342 | 325 |
343 } // namespace cricket | 326 } // namespace cricket |
344 | 327 |
345 #endif // TALK_MEDIA_BASE_STREAMPARAMS_H_ | 328 #endif // WEBRTC_MEDIA_BASE_STREAMPARAMS_H_ |
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