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| 1 /* | 1 /* |
| 2 * libjingle | 2 * libjingle |
| 3 * Copyright 2004 Google Inc. | 3 * Copyright 2004 Google Inc. |
| 4 * | 4 * |
| 5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
| 6 * modification, are permitted provided that the following conditions are met: | 6 * modification, are permitted provided that the following conditions are met: |
| 7 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright notice, | 8 * 1. Redistributions of source code must retain the above copyright notice, |
| 9 * this list of conditions and the following disclaimer. | 9 * this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright notice, | 10 * 2. Redistributions in binary form must reproduce the above copyright notice, |
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| 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 */ | 26 */ |
| 27 | 27 |
| 28 #include "talk/session/media/bundlefilter.h" | 28 #include "talk/session/media/bundlefilter.h" |
| 29 | 29 |
| 30 #include "talk/media/base/rtputils.h" | 30 #include "talk/media/base/rtputils.h" |
| 31 #include "webrtc/base/logging.h" | 31 #include "webrtc/base/logging.h" |
| 32 | 32 |
| 33 namespace cricket { | 33 namespace cricket { |
| 34 | 34 |
| 35 static const uint32 kSsrc01 = 0x01; | 35 static const uint32_t kSsrc01 = 0x01; |
| 36 | 36 |
| 37 BundleFilter::BundleFilter() { | 37 BundleFilter::BundleFilter() { |
| 38 } | 38 } |
| 39 | 39 |
| 40 BundleFilter::~BundleFilter() { | 40 BundleFilter::~BundleFilter() { |
| 41 } | 41 } |
| 42 | 42 |
| 43 bool BundleFilter::DemuxPacket(const char* data, size_t len, bool rtcp) { | 43 bool BundleFilter::DemuxPacket(const char* data, size_t len, bool rtcp) { |
| 44 // For rtp packets, we check whether the payload type can be found. | 44 // For rtp packets, we check whether the payload type can be found. |
| 45 // For rtcp packets, we check whether the ssrc can be found or is the special | 45 // For rtcp packets, we check whether the ssrc can be found or is the special |
| 46 // value 1 except for SDES packets which always pass through. Plus, if | 46 // value 1 except for SDES packets which always pass through. Plus, if |
| 47 // |streams_| is empty, we will allow all rtcp packets pass through provided | 47 // |streams_| is empty, we will allow all rtcp packets pass through provided |
| 48 // that they are valid rtcp packets in case that they are for early media. | 48 // that they are valid rtcp packets in case that they are for early media. |
| 49 if (!rtcp) { | 49 if (!rtcp) { |
| 50 // It may not be a RTP packet (e.g. SCTP). | 50 // It may not be a RTP packet (e.g. SCTP). |
| 51 if (!IsRtpPacket(data, len)) | 51 if (!IsRtpPacket(data, len)) |
| 52 return false; | 52 return false; |
| 53 | 53 |
| 54 int payload_type = 0; | 54 int payload_type = 0; |
| 55 if (!GetRtpPayloadType(data, len, &payload_type)) { | 55 if (!GetRtpPayloadType(data, len, &payload_type)) { |
| 56 return false; | 56 return false; |
| 57 } | 57 } |
| 58 return FindPayloadType(payload_type); | 58 return FindPayloadType(payload_type); |
| 59 } | 59 } |
| 60 | 60 |
| 61 // Rtcp packets using ssrc filter. | 61 // Rtcp packets using ssrc filter. |
| 62 int pl_type = 0; | 62 int pl_type = 0; |
| 63 uint32 ssrc = 0; | 63 uint32_t ssrc = 0; |
| 64 if (!GetRtcpType(data, len, &pl_type)) return false; | 64 if (!GetRtcpType(data, len, &pl_type)) return false; |
| 65 if (pl_type == kRtcpTypeSDES) { | 65 if (pl_type == kRtcpTypeSDES) { |
| 66 // SDES packet parsing not supported. | 66 // SDES packet parsing not supported. |
| 67 LOG(LS_INFO) << "SDES packet received for demux."; | 67 LOG(LS_INFO) << "SDES packet received for demux."; |
| 68 return true; | 68 return true; |
| 69 } else { | 69 } else { |
| 70 if (!GetRtcpSsrc(data, len, &ssrc)) return false; | 70 if (!GetRtcpSsrc(data, len, &ssrc)) return false; |
| 71 if (ssrc == kSsrc01) { | 71 if (ssrc == kSsrc01) { |
| 72 // SSRC 1 has a special meaning and indicates generic feedback on | 72 // SSRC 1 has a special meaning and indicates generic feedback on |
| 73 // some systems and should never be dropped. If it is forwarded | 73 // some systems and should never be dropped. If it is forwarded |
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| 85 | 85 |
| 86 bool BundleFilter::AddStream(const StreamParams& stream) { | 86 bool BundleFilter::AddStream(const StreamParams& stream) { |
| 87 if (GetStreamBySsrc(streams_, stream.first_ssrc())) { | 87 if (GetStreamBySsrc(streams_, stream.first_ssrc())) { |
| 88 LOG(LS_WARNING) << "Stream already added to filter"; | 88 LOG(LS_WARNING) << "Stream already added to filter"; |
| 89 return false; | 89 return false; |
| 90 } | 90 } |
| 91 streams_.push_back(stream); | 91 streams_.push_back(stream); |
| 92 return true; | 92 return true; |
| 93 } | 93 } |
| 94 | 94 |
| 95 bool BundleFilter::RemoveStream(uint32 ssrc) { | 95 bool BundleFilter::RemoveStream(uint32_t ssrc) { |
| 96 return RemoveStreamBySsrc(&streams_, ssrc); | 96 return RemoveStreamBySsrc(&streams_, ssrc); |
| 97 } | 97 } |
| 98 | 98 |
| 99 bool BundleFilter::HasStreams() const { | 99 bool BundleFilter::HasStreams() const { |
| 100 return !streams_.empty(); | 100 return !streams_.empty(); |
| 101 } | 101 } |
| 102 | 102 |
| 103 bool BundleFilter::FindStream(uint32 ssrc) const { | 103 bool BundleFilter::FindStream(uint32_t ssrc) const { |
| 104 return ssrc == 0 ? false : GetStreamBySsrc(streams_, ssrc) != nullptr; | 104 return ssrc == 0 ? false : GetStreamBySsrc(streams_, ssrc) != nullptr; |
| 105 } | 105 } |
| 106 | 106 |
| 107 bool BundleFilter::FindPayloadType(int pl_type) const { | 107 bool BundleFilter::FindPayloadType(int pl_type) const { |
| 108 return payload_types_.find(pl_type) != payload_types_.end(); | 108 return payload_types_.find(pl_type) != payload_types_.end(); |
| 109 } | 109 } |
| 110 | 110 |
| 111 void BundleFilter::ClearAllPayloadTypes() { | 111 void BundleFilter::ClearAllPayloadTypes() { |
| 112 payload_types_.clear(); | 112 payload_types_.clear(); |
| 113 } | 113 } |
| 114 | 114 |
| 115 } // namespace cricket | 115 } // namespace cricket |
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