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