1 /* 2 * libjingle 3 * Copyright 2011 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_RTPUTILS_H_ 29 #define TALK_MEDIA_BASE_RTPUTILS_H_ 30 31 #include "webrtc/base/byteorder.h" 32 33 namespace cricket { 34 35 const size_t kMinRtpPacketLen = 12; 36 const size_t kMaxRtpPacketLen = 2048; 37 const size_t kMinRtcpPacketLen = 4; 38 39 struct RtpHeader { 40 int payload_type; 41 int seq_num; 42 uint32 timestamp; 43 uint32 ssrc; 44 }; 45 46 enum RtcpTypes { 47 kRtcpTypeSR = 200, // Sender report payload type. 48 kRtcpTypeRR = 201, // Receiver report payload type. 49 kRtcpTypeSDES = 202, // SDES payload type. 50 kRtcpTypeBye = 203, // BYE payload type. 51 kRtcpTypeApp = 204, // APP payload type. 52 kRtcpTypeRTPFB = 205, // Transport layer Feedback message payload type. 53 kRtcpTypePSFB = 206, // Payload-specific Feedback message payload type. 54 }; 55 56 bool GetRtpVersion(const void* data, size_t len, int* version); 57 bool GetRtpPayloadType(const void* data, size_t len, int* value); 58 bool GetRtpSeqNum(const void* data, size_t len, int* value); 59 bool GetRtpTimestamp(const void* data, size_t len, uint32* value); 60 bool GetRtpSsrc(const void* data, size_t len, uint32* value); 61 bool GetRtpHeaderLen(const void* data, size_t len, size_t* value); 62 bool GetRtcpType(const void* data, size_t len, int* value); 63 bool GetRtcpSsrc(const void* data, size_t len, uint32* value); 64 bool GetRtpHeader(const void* data, size_t len, RtpHeader* header); 65 66 // Assumes marker bit is 0. 67 bool SetRtpHeaderFlags( 68 void* data, size_t len, 69 bool padding, bool extension, int csrc_count); 70 bool SetRtpPayloadType(void* data, size_t len, int value); 71 bool SetRtpSeqNum(void* data, size_t len, int value); 72 bool SetRtpTimestamp(void* data, size_t len, uint32 value); 73 bool SetRtpSsrc(void* data, size_t len, uint32 value); 74 // Assumes version 2, no padding, no extensions, no csrcs. 75 bool SetRtpHeader(void* data, size_t len, const RtpHeader& header); 76 77 bool IsRtpPacket(const void* data, size_t len); 78 } // namespace cricket 79 80 #endif // TALK_MEDIA_BASE_RTPUTILS_H_ 81
