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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <fuzzer/FuzzedDataProvider.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "opus.h"
#include "opus_types.h"
#include "opus_defines.h"
#define MAX_PACKET (1500)
#define SAMPLES (48000 * 10)
#define MAX_FRAME_SAMP (5760)
static const int sampling_rates[] = {8000, 12000, 16000, 24000, 48000};
static const int channels[] = {1, 2};
static const int applications[] = {OPUS_APPLICATION_AUDIO,
OPUS_APPLICATION_VOIP,
OPUS_APPLICATION_RESTRICTED_LOWDELAY};
static const int frame_sizes_ms_x2[] = {5, 10, 20, 40, 80, 120, 160, 200, 240};
static opus_int16 inbuf[sizeof(opus_int16) * SAMPLES] = {0};
static unsigned char packet[MAX_PACKET + 257];
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
FuzzedDataProvider fdp(data, size);
int err = OPUS_OK;
int num_channels = fdp.PickValueInArray(channels);
int frame_size = fdp.PickValueInArray(frame_sizes_ms_x2);
int sampling_rate = fdp.PickValueInArray(sampling_rates);
int application = fdp.PickValueInArray(applications);
OpusEncoder *enc =
opus_encoder_create(sampling_rate, num_channels, application, &err);
if (err != OPUS_OK || enc == NULL) {
opus_encoder_destroy(enc);
return 0;
}
opus_encoder_ctl(enc, OPUS_SET_COMPLEXITY(fdp.ConsumeIntegralInRange(0, 10)));
opus_encoder_ctl(enc, OPUS_SET_VBR(fdp.ConsumeBool()));
opus_encoder_ctl(enc, OPUS_SET_VBR_CONSTRAINT(fdp.ConsumeBool()));
opus_encoder_ctl(
enc, OPUS_SET_FORCE_CHANNELS(fdp.PickValueInArray({OPUS_AUTO, 1, 2})));
opus_encoder_ctl(enc,
OPUS_SET_MAX_BANDWIDTH(fdp.PickValueInArray(
{OPUS_BANDWIDTH_NARROWBAND, OPUS_BANDWIDTH_MEDIUMBAND,
OPUS_BANDWIDTH_WIDEBAND, OPUS_BANDWIDTH_SUPERWIDEBAND,
OPUS_BANDWIDTH_FULLBAND})));
opus_encoder_ctl(enc, OPUS_SET_INBAND_FEC(fdp.ConsumeBool()));
opus_encoder_ctl(
enc, OPUS_SET_PACKET_LOSS_PERC(fdp.ConsumeIntegralInRange(0, 100)));
opus_encoder_ctl(enc, OPUS_SET_DTX(fdp.ConsumeBool()));
opus_encoder_ctl(enc, OPUS_SET_LSB_DEPTH(fdp.ConsumeIntegralInRange(8, 24)));
opus_encoder_ctl(enc, OPUS_SET_PREDICTION_DISABLED((fdp.ConsumeBool())));
opus_encoder_ctl(enc,
OPUS_SET_SIGNAL(fdp.PickValueInArray(
{OPUS_AUTO, OPUS_SIGNAL_VOICE, OPUS_SIGNAL_MUSIC})));
opus_encoder_ctl(enc,
OPUS_SET_PHASE_INVERSION_DISABLED(((fdp.ConsumeBool()))));
fdp.ConsumeData(inbuf, sizeof(inbuf));
size_t samp_count = 0;
do {
const int frame_size_samples = frame_size * sampling_rate / 2000;
const int len = opus_encode(enc, &inbuf[samp_count * num_channels],
frame_size_samples, packet, MAX_PACKET);
if (len < 0 || len > MAX_PACKET) {
break;
}
samp_count += frame_size;
} while (samp_count < ((SAMPLES / 2) - MAX_FRAME_SAMP));
opus_encoder_destroy(enc);
return 0;
}
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