1 /*
2 * Copyright (c) 2019, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 /*
13 * See build_av1_dec_fuzzer.sh for building instructions.
14 */
15
16 #include <stddef.h>
17 #include <stdint.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <algorithm>
21 #include <memory>
22 #include "config/aom_config.h"
23 #include "aom/aom_decoder.h"
24 #include "aom/aomdx.h"
25 #include "aom_ports/mem_ops.h"
26
27 #define IVF_FRAME_HDR_SZ (4 + 8) /* 4 byte size + 8 byte timestamp */
28 #define IVF_FILE_HDR_SZ 32
29
usage_exit(void)30 extern "C" void usage_exit(void) { exit(EXIT_FAILURE); }
31
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)32 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
33 if (size <= IVF_FILE_HDR_SZ) {
34 return 0;
35 }
36
37 aom_codec_iface_t *codec_interface = aom_codec_av1_dx();
38 aom_codec_ctx_t codec;
39 // Set thread count in the range [1, 64].
40 const unsigned int threads = (data[IVF_FILE_HDR_SZ] & 0x3f) + 1;
41 aom_codec_dec_cfg_t cfg = { threads, 0, 0, !FORCE_HIGHBITDEPTH_DECODING };
42 if (aom_codec_dec_init(&codec, codec_interface, &cfg, 0)) {
43 return 0;
44 }
45
46 data += IVF_FILE_HDR_SZ;
47 size -= IVF_FILE_HDR_SZ;
48
49 while (size > IVF_FRAME_HDR_SZ) {
50 size_t frame_size = mem_get_le32(data);
51 size -= IVF_FRAME_HDR_SZ;
52 data += IVF_FRAME_HDR_SZ;
53 frame_size = std::min(size, frame_size);
54
55 const aom_codec_err_t err =
56 aom_codec_decode(&codec, data, frame_size, nullptr);
57 static_cast<void>(err);
58 aom_codec_iter_t iter = nullptr;
59 aom_image_t *img = nullptr;
60 while ((img = aom_codec_get_frame(&codec, &iter)) != nullptr) {
61 }
62 data += frame_size;
63 size -= frame_size;
64 }
65 aom_codec_destroy(&codec);
66 return 0;
67 }
68