| /* |
| * Copyright (c) 2019, Alliance for Open Media. All rights reserved. |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| /* |
| * See build_av1_dec_fuzzer.sh for building instructions. |
| */ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <algorithm> |
| #include <memory> |
| #include "config/aom_config.h" |
| #include "aom/aom_decoder.h" |
| #include "aom/aomdx.h" |
| #include "aom_ports/mem_ops.h" |
| |
| #define IVF_FRAME_HDR_SZ (4 + 8) /* 4 byte size + 8 byte timestamp */ |
| #define IVF_FILE_HDR_SZ 32 |
| |
| extern "C" void usage_exit(void) { exit(EXIT_FAILURE); } |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { |
| if (size <= IVF_FILE_HDR_SZ) { |
| return 0; |
| } |
| |
| // Abusing the four unused bytes at the end of the IVF file header as a source |
| // of random bits. |
| unsigned int tile_mode = (data[IVF_FILE_HDR_SZ - 1] & 2) != 0; |
| unsigned int ext_tile_debug = (data[IVF_FILE_HDR_SZ - 1] & 4) != 0; |
| unsigned int is_annexb = (data[IVF_FILE_HDR_SZ - 1] & 8) != 0; |
| int output_all_layers = (data[IVF_FILE_HDR_SZ - 1] & 0x10) != 0; |
| int operating_point = data[IVF_FILE_HDR_SZ - 2] & 0x1F; |
| |
| aom_codec_iface_t *codec_interface = aom_codec_av1_dx(); |
| aom_codec_ctx_t codec; |
| // Set thread count in the range [1, 64]. |
| const unsigned int threads = (data[IVF_FILE_HDR_SZ] & 0x3f) + 1; |
| aom_codec_dec_cfg_t cfg = { threads, 0, 0, !FORCE_HIGHBITDEPTH_DECODING }; |
| if (aom_codec_dec_init(&codec, codec_interface, &cfg, 0)) { |
| return 0; |
| } |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1_SET_TILE_MODE, tile_mode); |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_EXT_TILE_DEBUG, ext_tile_debug); |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_SET_IS_ANNEXB, is_annexb); |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_SET_OUTPUT_ALL_LAYERS, |
| output_all_layers); |
| AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1D_SET_OPERATING_POINT, |
| operating_point); |
| |
| data += IVF_FILE_HDR_SZ; |
| size -= IVF_FILE_HDR_SZ; |
| |
| while (size > IVF_FRAME_HDR_SZ) { |
| size_t frame_size = mem_get_le32(data); |
| size -= IVF_FRAME_HDR_SZ; |
| data += IVF_FRAME_HDR_SZ; |
| frame_size = std::min(size, frame_size); |
| |
| aom_codec_stream_info_t stream_info; |
| stream_info.is_annexb = is_annexb; |
| aom_codec_err_t err = |
| aom_codec_peek_stream_info(codec_interface, data, size, &stream_info); |
| static_cast<void>(err); |
| |
| err = aom_codec_decode(&codec, data, frame_size, nullptr); |
| static_cast<void>(err); |
| aom_codec_iter_t iter = nullptr; |
| aom_image_t *img = nullptr; |
| while ((img = aom_codec_get_frame(&codec, &iter)) != nullptr) { |
| } |
| data += frame_size; |
| size -= frame_size; |
| } |
| aom_codec_destroy(&codec); |
| return 0; |
| } |