blob: ce9d8fdbc8dd8d6d47f6f2303fcfb28cf88efe83 [file] [log] [blame]
/*
* Copyright (c) 2015 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 <memory>
#include "modules/include/module_common_types_public.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/rtp_rtcp/source/fec_test_helper.h"
#include "modules/rtp_rtcp/source/ulpfec_generator.h"
#include "rtc_base/checks.h"
namespace webrtc {
namespace {
constexpr uint8_t kFecPayloadType = 96;
constexpr uint8_t kRedPayloadType = 97;
} // namespace
void FuzzOneInput(const uint8_t* data, size_t size) {
UlpfecGenerator generator;
size_t i = 0;
if (size < 4)
return;
FecProtectionParams params = {
data[i++] % 128, static_cast<int>(data[i++] % 10), kFecMaskBursty};
generator.SetFecParameters(params);
uint16_t seq_num = data[i++];
uint16_t prev_seq_num = 0;
while (i + 3 < size) {
size_t rtp_header_length = data[i++] % 10 + 12;
size_t payload_size = data[i++] % 10;
if (i + payload_size + rtp_header_length + 2 > size)
break;
std::unique_ptr<uint8_t[]> packet(
new uint8_t[payload_size + rtp_header_length]);
memcpy(packet.get(), &data[i], payload_size + rtp_header_length);
// Make sure sequence numbers are increasing.
ByteWriter<uint16_t>::WriteBigEndian(&packet[2], seq_num++);
i += payload_size + rtp_header_length;
const bool protect = data[i++] % 2 == 1;
// Check the sequence numbers are monotonic. In rare case the packets number
// may loop around and in the same FEC-protected group the packet sequence
// number became out of order.
if (protect && IsNewerSequenceNumber(seq_num, prev_seq_num) &&
seq_num < prev_seq_num + kUlpfecMaxMediaPackets) {
generator.AddRtpPacketAndGenerateFec(packet.get(), payload_size,
rtp_header_length);
prev_seq_num = seq_num;
}
const size_t num_fec_packets = generator.NumAvailableFecPackets();
if (num_fec_packets > 0) {
std::vector<std::unique_ptr<RedPacket>> fec_packets =
generator.GetUlpfecPacketsAsRed(kRedPayloadType, kFecPayloadType,
100);
RTC_CHECK_EQ(num_fec_packets, fec_packets.size());
}
}
}
} // namespace webrtc