1 /*
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include <fuzzer/FuzzedDataProvider.h>
17
18 #include "include/lc3.h"
19
TestEncoder(FuzzedDataProvider & fdp)20 void TestEncoder(FuzzedDataProvider& fdp) {
21 enum lc3_pcm_format pcm_format =
22 fdp.PickValueInArray({LC3_PCM_FORMAT_S16, LC3_PCM_FORMAT_S24});
23 int dt_us = fdp.PickValueInArray({10000, 7500});
24 int sr_hz =
25 fdp.PickValueInArray({8000, 16000, 24000, 32000, /*44100,*/ 48000});
26 unsigned enc_size = lc3_encoder_size(dt_us, sr_hz);
27 uint16_t output_byte_count = fdp.ConsumeIntegralInRange(20, 400);
28 uint16_t num_frames = lc3_frame_samples(dt_us, sr_hz);
29 uint8_t bytes_per_frame = (pcm_format == LC3_PCM_FORMAT_S16 ? 2 : 4);
30
31 if (fdp.remaining_bytes() < num_frames * bytes_per_frame) {
32 return;
33 }
34
35 std::vector<uint32_t> input_frames(
36 num_frames / (pcm_format == LC3_PCM_FORMAT_S16 ? 2 : 1));
37 fdp.ConsumeData(input_frames.data(), num_frames * bytes_per_frame);
38
39 void* lc3_encoder_mem = nullptr;
40 lc3_encoder_mem = malloc(enc_size);
41 lc3_encoder_t lc3_encoder =
42 lc3_setup_encoder(dt_us, sr_hz, 0, lc3_encoder_mem);
43
44 std::vector<uint8_t> output(output_byte_count);
45 lc3_encode(lc3_encoder, pcm_format, (const int16_t*)input_frames.data(), 1,
46 output.size(), output.data());
47
48 free(lc3_encoder_mem);
49 lc3_encoder_mem = nullptr;
50 return;
51 }
52
TestDecoder(FuzzedDataProvider & fdp)53 void TestDecoder(FuzzedDataProvider& fdp) {
54 enum lc3_pcm_format pcm_format =
55 fdp.PickValueInArray({LC3_PCM_FORMAT_S16, LC3_PCM_FORMAT_S24});
56 int dt_us = fdp.PickValueInArray({10000, 7500});
57 int sr_hz =
58 fdp.PickValueInArray({8000, 16000, 24000, 32000, /*44100,*/ 48000});
59 unsigned dec_size = lc3_decoder_size(dt_us, sr_hz);
60 uint16_t input_byte_count = fdp.ConsumeIntegralInRange(20, 400);
61 uint16_t num_frames = lc3_frame_samples(dt_us, sr_hz);
62
63 if (fdp.remaining_bytes() < input_byte_count) {
64 return;
65 }
66
67 std::vector<uint8_t> input(input_byte_count);
68 fdp.ConsumeData(input.data(), input.size());
69
70 void* lc3_decoder_mem = nullptr;
71 lc3_decoder_mem = malloc(dec_size);
72 lc3_decoder_t lc3_decoder =
73 lc3_setup_decoder(dt_us, sr_hz, 0, lc3_decoder_mem);
74
75 std::vector<uint32_t> output(num_frames /
76 (pcm_format == LC3_PCM_FORMAT_S16 ? 2 : 1));
77 lc3_decode(lc3_decoder, input.data(), input.size(), pcm_format,
78 (int16_t*)output.data(), 1);
79
80 /* Empty input performs PLC (packet loss concealment) */
81 lc3_decode(lc3_decoder, nullptr, 0, pcm_format, (int16_t*)output.data(), 1);
82
83 free(lc3_decoder_mem);
84 lc3_decoder_mem = nullptr;
85 return;
86 }
87
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)88 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
89 FuzzedDataProvider fdp(data, size);
90 TestEncoder(fdp);
91 TestDecoder(fdp);
92 return 0;
93 }