108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "opusfile/config.h"
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#include "opusfile/include/opusfile.h"
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// Opusfile fuzzing wrapper to help with automated fuzz testing. It's based on
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// https://github.com/xiph/opusfile/blob/master/examples/opusfile_example.c
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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int ret, tmp;
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OggOpusFile *of = op_open_memory(data, size, &ret);
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if (!of)
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return 0;
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op_link_count(of);
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int link_index = -1;
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op_pcm_total(of, link_index);
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op_raw_total(of, link_index);
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op_pcm_tell(of);
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op_raw_tell(of);
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ogg_int64_t total_sample_count = 0;
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const int pcm_size = 120 * 48 * 2; // 120ms/ch@48kHz is recommended
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opus_int16 pcm[pcm_size];
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for (;;) {
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ret = op_read_stereo(of, pcm, pcm_size);
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if (ret < 0) {
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break;
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}
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if (op_current_link(of) != link_index) {
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link_index = op_current_link(of);
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op_pcm_total(of, link_index);
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op_raw_total(of, link_index);
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op_pcm_tell(of);
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op_raw_tell(of);
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op_bitrate_instant(of);
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tmp = op_head(of, link_index)->version;
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const OpusTags *tags = op_tags(of, link_index);
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for (int i = 0; i < tags->comments; ++i) {
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// Note: The compare also touches memory allocated for user_comments[i].
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// This is a desired side effect and should be kept even if this
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// comparison is removed.
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if (opus_tagncompare("METADATA_BLOCK_PICTURE", 22,
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tags->user_comments[i]) == 0) {
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OpusPictureTag pic;
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if (opus_picture_tag_parse(&pic, tags->user_comments[i]) >= 0) {
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opus_picture_tag_clear(&pic);
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}
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}
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}
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if (tags->vendor) {
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tmp = tags->vendor[0];
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}
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int binary_suffix_len;
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opus_tags_get_binary_suffix(tags, &binary_suffix_len);
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}
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if (ret == 0) {
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break;
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}
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total_sample_count += ret;
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}
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if (total_sample_count > 0) {
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// Try random-access PCM reads. The number of tests is arbitrary and the
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// offset is designed to be pseudo-random, but deterministic - this is
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// implemented using Lehmer RNG with a minor hack that probably breaks some
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// properties of the RNG (but that is acceptable).
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ogg_int64_t rng_seed = 1307832949LL;
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for (int i = 0; i < 32; ++i) {
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// Derive the next deterministic offset to test and iterate the RNG.
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rng_seed = (rng_seed * 279470273LL);
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const ogg_int64_t offset = rng_seed % total_sample_count;
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rng_seed = rng_seed % 4294967291LL;
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if (op_pcm_seek(of, offset) == 0) {
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tmp = op_read_stereo(of, pcm, pcm_size);
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}
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}
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}
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op_free(of);
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return 0;
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}
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