127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* Copyright (c) 2017 Google Inc. */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "opus.h"
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#include "opus_types.h"
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#define MAX_FRAME_SAMP 5760
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#define MAX_PACKET 1500
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/* 4 bytes: packet length, 4 bytes: encoder final range */
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#define SETUP_BYTE_COUNT 8
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typedef struct {
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int fs;
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int channels;
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} TocInfo;
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static void ParseToc(const uint8_t *toc, TocInfo *const info) {
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const int samp_freqs[5] = {8000, 12000, 16000, 24000, 48000};
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const int bandwidth = opus_packet_get_bandwidth(toc);
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info->fs = samp_freqs[bandwidth - OPUS_BANDWIDTH_NARROWBAND];
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info->channels = opus_packet_get_nb_channels(toc);
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}
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/* Treats the input data as concatenated packets encoded by opus_demo,
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* structured as
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* bytes 0..3: packet length
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* bytes 4..7: encoder final range
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* bytes 8+ : Opus packet, including ToC
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*/
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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OpusDecoder *dec;
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opus_int16 *pcm;
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uint8_t *packet;
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TocInfo toc;
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int i, err;
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/* Not enough data to setup the decoder (+1 for the ToC) */
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if (size < SETUP_BYTE_COUNT + 1) {
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return 0;
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}
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/* Create decoder based on info from the first ToC available */
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ParseToc(&data[SETUP_BYTE_COUNT], &toc);
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dec = opus_decoder_create(toc.fs, toc.channels, &err);
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if (err != OPUS_OK | dec == NULL) {
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return 0;
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}
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pcm = (opus_int16*) malloc(sizeof(*pcm) * MAX_FRAME_SAMP * toc.channels);
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packet = (uint8_t*) calloc(MAX_PACKET, sizeof(*packet));
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i = 0;
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while (1) {
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int len, fec;
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if (i + SETUP_BYTE_COUNT >= size) {
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break;
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}
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len = (opus_uint32) data[i ] << 24 |
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(opus_uint32) data[i + 1] << 16 |
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(opus_uint32) data[i + 2] << 8 |
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(opus_uint32) data[i + 3];
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if (len > MAX_PACKET || len < 0) {
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break;
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}
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/* Bytes 4..7 represent encoder final range, but are unused here.
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* Instead, byte 4 is repurposed to determine if FEC is used. */
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fec = data[i + 4] & 1;
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/* Lost packet */
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if (len == 0) {
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int frame_size;
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opus_decoder_ctl(dec, OPUS_GET_LAST_PACKET_DURATION(&frame_size));
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(void) opus_decode(dec, NULL, size, pcm, frame_size, fec);
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} else {
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if (i + SETUP_BYTE_COUNT + len > size) {
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break;
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}
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memcpy(pcm, &data[i + SETUP_BYTE_COUNT], len);
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(void) opus_decode(dec, data, size, pcm, MAX_FRAME_SAMP, fec);
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}
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i += SETUP_BYTE_COUNT + len;
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}
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opus_decoder_destroy(dec);
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free(pcm);
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free(packet);
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return 0;
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}
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