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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 <stddef.h>
#include <algorithm>
#include <memory>
#include <random>
#include "../celt/mathops.h"
#include "../celt/os_support.h"
#include "opus.h"
#include "opus_defines.h"
#include "opus_multistream.h"
#include "opus_projection.h"
#include "opus_types.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
FuzzedDataProvider fdp(data, size);
const int frame_size_ms_x2 =
fdp.PickValueInArray({5, 10, 20, 40, 80, 120, 160, 200, 240});
const opus_int32 frequency = fdp.PickValueInArray({8, 12, 16, 24, 48}) * 1000;
const int frame_size = frame_size_ms_x2 * frequency / 2000;
const opus_int32 nb_channels = fdp.ConsumeIntegralInRange(0, 255);
const int streams = fdp.ConsumeIntegralInRange(0, 255);
const int coupled_streams = fdp.ConsumeIntegralInRange(0, 255);
const bool use_fec = fdp.ConsumeBool();
const bool use_float = fdp.ConsumeBool();
unsigned char *mapping = (unsigned char *)malloc(nb_channels);
if (!mapping) {
return 0;
}
for (unsigned char x = 0; x < nb_channels; ++x) {
mapping[x] = fdp.ConsumeIntegralInRange(0, 255);
}
int err = OPUS_OK;
OpusMSDecoder *const decoder = opus_multistream_decoder_create(
frequency, nb_channels, streams, coupled_streams, mapping, &err);
free(mapping);
if (decoder == nullptr || err != OPUS_OK) {
return 0;
}
auto payload = fdp.ConsumeRemainingBytes<unsigned char>();
const opus_int16 payload_size =
std::min((const unsigned long)SHRT_MAX, payload.size());
if (use_float) {
float *pcm = (float *)opus_alloc(sizeof(float) * frame_size * nb_channels);
if (pcm == NULL) {
goto end;
}
const int foo = opus_multistream_decode_float(
decoder, payload.data(), payload_size, pcm, frame_size, use_fec);
(void)foo;
opus_free(pcm);
} else {
opus_int16 *pcm =
(opus_int16 *)opus_alloc(sizeof(opus_int16) * frame_size * nb_channels);
if (pcm == NULL) {
goto end;
}
const int foo = opus_multistream_decode(
decoder, payload.data(), payload_size, pcm, frame_size, use_fec);
(void)foo;
opus_free(pcm);
}
end:
opus_multistream_decoder_destroy(decoder);
return 0;
}
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