Add packetization and coding/decoding of feedback message format.

webrtc/modules/rtp_rtcp/source/byte_io.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 32 matching lines @@
 namespace webrtc {
 
 // Class for reading integers from a sequence of bytes.
 // T = type of integer, B = bytes to read, is_signed = true if signed integer
 // If is_signed is true and B < sizeof(T), sign extension might be needed
 template<typename T, unsigned int B = sizeof(T),
     bool is_signed = std::numeric_limits<T>::is_signed>
 class ByteReader {
  public:
   static T ReadBigEndian(const uint8_t* data) {
+    static_assert(B <= sizeof(T), "Target size too large");
     if (is_signed && B < sizeof(T)) {
       return SignExtend(InternalReadBigEndian(data));
     }
     return InternalReadBigEndian(data);
   }
 
   static T ReadLittleEndian(const uint8_t* data) {
+    static_assert(B <= sizeof(T), "Target size too large");
     if (is_signed && B < sizeof(T)) {
       return SignExtend(InternalReadLittleEndian(data));
     }
     return InternalReadLittleEndian(data);
   }
 
  private:
   static T InternalReadBigEndian(const uint8_t* data) {
     T val(0);
     for (unsigned int i = 0; i < B; ++i) {
@@ skipping 29 matching lines @@
     return val;
   }
 };
 
 // Class for writing integers to a sequence of bytes
 // T = type of integer, B = bytes to write
 template<typename T, unsigned int B = sizeof(T)>
 class ByteWriter {
  public:
   static void WriteBigEndian(uint8_t* data, T val) {
+    static_assert(B <= sizeof(T), "Target size too large");
     for (unsigned int i = 0; i < B; ++i) {
       data[i] = val >> ((B - 1 - i) * 8);
     }
   }
 
   static void WriteLittleEndian(uint8_t* data, T val) {
+    static_assert(B <= sizeof(T), "Target size too large");
     for (unsigned int i = 0; i < B; ++i) {
       data[i] = val >> (i * 8);
     }
   }
 };
 
 
 // -------- Below follows specializations for B in { 2, 4, 8 } --------
 
 
@@ skipping 104 matching lines @@
     data[4] = val >> 32;
     data[5] = val >> 40;
     data[6] = val >> 48;
     data[7] = val >> 56;
   }
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_BYTE_IO_H_