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97 lines
2.8 KiB
97 lines
2.8 KiB
4 months ago
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/******************************************************************************
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*
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* Copyright (C) 2020 The Android Open Source Project
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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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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#include <stdint.h>
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#include <string.h>
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#include <algorithm>
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#include "gsm.h"
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constexpr size_t kGsmInNumSamples = 160;
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constexpr size_t kGsmInBufferSize = kGsmInNumSamples * sizeof(gsm_signal);
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enum { IDX_VERBOSITY, IDX_FAST, IDX_LTP_CUT, IDX_WAV49, IDX_LAST };
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class Codec {
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public:
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Codec() = default;
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~Codec() { deInitEncoder(); }
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bool initEncoder();
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void encodeFrames(uint8_t *data, size_t size);
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void deInitEncoder();
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private:
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gsm mGsm = nullptr;
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};
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bool Codec::initEncoder() {
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mGsm = gsm_create();
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return mGsm ? true : false;
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}
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void Codec::encodeFrames(uint8_t *data, size_t size) {
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int32_t verbosity = data[IDX_VERBOSITY] & 0x01;
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int32_t fast = data[IDX_FAST] & 0x01;
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int32_t ltp_cut = data[IDX_LTP_CUT] & 0x01;
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int32_t wav49 = data[IDX_WAV49] & 0x01;
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gsm_option(mGsm, GSM_OPT_VERBOSE, &verbosity);
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gsm_option(mGsm, GSM_OPT_FAST, &fast);
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gsm_option(mGsm, GSM_OPT_LTP_CUT, <p_cut);
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gsm_option(mGsm, GSM_OPT_WAV49, &wav49);
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data += IDX_LAST;
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size -= IDX_LAST;
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while (size > 0) {
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gsm_signal tmpData[kGsmInNumSamples];
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gsm_frame out;
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size_t frameSize = std::min(size, kGsmInBufferSize);
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memcpy(tmpData, data, frameSize);
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if (frameSize < kGsmInBufferSize) {
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memset(reinterpret_cast<uint8_t *>(tmpData) + frameSize, data[0],
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kGsmInBufferSize - frameSize);
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}
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gsm_encode(mGsm, tmpData, out);
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data += frameSize;
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size -= frameSize;
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}
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}
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void Codec::deInitEncoder() {
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if (mGsm) {
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gsm_destroy(mGsm);
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mGsm = nullptr;
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}
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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if (size < IDX_LAST) {
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return 0;
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}
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Codec *codec = new Codec();
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if (!codec) {
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return 0;
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}
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if (codec->initEncoder()) {
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codec->encodeFrames(const_cast<uint8_t *>(data), size);
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}
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delete codec;
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return 0;
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}
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