| /* |
| * Copyright (c) 2012 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. |
| */ |
| |
| #include "typedefs.h" |
| |
| namespace webrtc { |
| |
| // Packet mask size in bytes (L bit is set). |
| static const int kMaskSizeLBitSet = 6; |
| // Packet mask size in bytes (L bit is cleared). |
| static const int kMaskSizeLBitClear = 2; |
| |
| namespace internal { |
| |
| /** |
| * Returns an array of packet masks. The mask of a single FEC packet |
| * corresponds to a number of mask bytes. The mask indicates which |
| * media packets should be protected by the FEC packet. |
| |
| * \param[in] numMediaPackets The number of media packets to protect. |
| * [1, maxMediaPackets]. |
| * \param[in] numFecPackets The number of FEC packets which will |
| * be generated. [1, numMediaPackets]. |
| * \param[in] numImpPackets The number of important packets. |
| * [0, numMediaPackets]. |
| * numImpPackets = 0 is the equal |
| * protection scenario. |
| * \param[in] useUnequalProtection Enables unequal protection: allocates |
| * more protection to the numImpPackets. |
| * \param[out] packetMask A pointer to hold the packet mask array, |
| * of size: |
| * numFecPackets * "number of mask bytes". |
| */ |
| void GeneratePacketMasks(int numMediaPackets, |
| int numFecPackets, |
| int numImpPackets, |
| bool useUnequalProtection, |
| uint8_t* packetMask); |
| |
| } // namespace internal |
| } // namespace webrtc |
