1 /*
2 * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "test/fuzzers/audio_encoder_fuzzer.h"
12
13 #include <cstring>
14
15 #include "rtc_base/buffer.h"
16 #include "rtc_base/checks.h"
17 #include "test/fuzzers/fuzz_data_helper.h"
18
19 namespace webrtc {
20
21 // This function reads bytes from |data_view|, interprets them as RTP timestamp
22 // and input samples, and sends them for encoding. The process continues until
23 // no more data is available.
FuzzAudioEncoder(rtc::ArrayView<const uint8_t> data_view,std::unique_ptr<AudioEncoder> encoder)24 void FuzzAudioEncoder(rtc::ArrayView<const uint8_t> data_view,
25 std::unique_ptr<AudioEncoder> encoder) {
26 test::FuzzDataHelper data(data_view);
27 const size_t block_size_samples =
28 encoder->SampleRateHz() / 100 * encoder->NumChannels();
29 const size_t block_size_bytes = block_size_samples * sizeof(int16_t);
30 if (data_view.size() / block_size_bytes > 1000) {
31 // If the size of the fuzzer data is more than 1000 input blocks (i.e., more
32 // than 10 seconds), then don't fuzz at all for the fear of timing out.
33 return;
34 }
35
36 rtc::BufferT<int16_t> input_aligned(block_size_samples);
37 rtc::Buffer encoded;
38
39 // Each round in the loop below will need one block of samples + a 32-bit
40 // timestamp from the fuzzer input.
41 const size_t bytes_to_read = block_size_bytes + sizeof(uint32_t);
42 while (data.CanReadBytes(bytes_to_read)) {
43 const uint32_t timestamp = data.Read<uint32_t>();
44 auto byte_array = data.ReadByteArray(block_size_bytes);
45 // Align the data by copying to another array.
46 RTC_DCHECK_EQ(input_aligned.size() * sizeof(int16_t),
47 byte_array.size() * sizeof(uint8_t));
48 memcpy(input_aligned.data(), byte_array.data(), byte_array.size());
49 auto info = encoder->Encode(timestamp, input_aligned, &encoded);
50 }
51 }
52
53 } // namespace webrtc
54