Add rtppacketuil.h/cc

talk/media/base/rtputils.h

 /*
  * libjingle
  * Copyright 2011 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 12 matching lines @@
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef TALK_MEDIA_BASE_RTPUTILS_H_
 #define TALK_MEDIA_BASE_RTPUTILS_H_
 
 #include "webrtc/base/byteorder.h"
 
+namespace rtc {
+struct PacketTimeUpdateParams;
+}  // namespace rtc
+
 namespace cricket {
 
 const size_t kMinRtpPacketLen = 12;
 const size_t kMaxRtpPacketLen = 2048;
 const size_t kMinRtcpPacketLen = 4;
 
 struct RtpHeader {
   int payload_type;
   int seq_num;
   uint32_t timestamp;
@@ skipping 21 matching lines @@
 
 bool SetRtpSsrc(void* data, size_t len, uint32_t value);
 // Assumes version 2, no padding, no extensions, no csrcs.
 bool SetRtpHeader(void* data, size_t len, const RtpHeader& header);
 
 bool IsRtpPacket(const void* data, size_t len);
 
 // True if |payload type| is 0-127.
 bool IsValidRtpPayloadType(int payload_type);
 
+// Verifies that a packet has a valid RTP header.
+bool ValidateRtpHeader(const uint8_t* rtp,
+                       size_t length,
+                       size_t* header_length);
+
+// Helper method which updates absolute send time extension if present.

[pthatcher1, 2016/01/14 19:34:02]

updates absolute send time => updates the absolute send time

[Sergey Ulanov, 2016/01/14 20:13:10]

Done.

+bool UpdateRtpAbsSendTimeExtension(uint8_t* rtp,
+                                   size_t length,
+                                   int extension_id,
+                                   uint64_t time_us);
+
+// Applies specified |options| to the packet. It updates absolute send time

[pthatcher1, 2016/01/14 19:34:02]

Same here

[Sergey Ulanov, 2016/01/14 20:13:10]

Done.

+// extension header if it is present present then updates HMAC.
+bool ApplyPacketOptions(uint8_t* data,
+                        size_t length,
+                        const rtc::PacketTimeUpdateParams& packet_time_params,
+                        uint64_t time_us);
+
+
 }  // namespace cricket
 
 #endif  // TALK_MEDIA_BASE_RTPUTILS_H_