/*

 * Copyright (c) 2023 Huawei Device Co., Ltd.

 * 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 <cstddef>

#include <cstdint>

#include <fcntl.h>

#include <unistd.h>

#include <sys/stat.h>

#include "securec.h"

#include <fuzzer/FuzzedDataProvider.h>

#include <iostream>

#include "demuxer_sample.h"



#define FUZZ_PROJECT_NAME "demuxer_fuzzer"

using namespace std;

using namespace OHOS::Media;

namespace OHOS {

const char *CAF_PATH = "/data/test/fuzz_create.caf";

const int64_t EXPECT_SIZE = 90;

const size_t URI_BUFFER_SIZE = 21;

const int64_t URI_COUNT = 20;

const char FLAG = '\0';

const size_t LANGUAGE_BUFFER_SIZE = 3;

const size_t LANGUAGE_COUNT = 2;

bool CheckDataValidity(FuzzedDataProvider *fdp, size_t dataSize)

{

    if (dataSize <= EXPECT_SIZE) {

        return false;

    }

    int32_t fd = open(CAF_PATH, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);

    if (fd < 0) {

        return false;

    }

    uint8_t *pstream = nullptr;

    uint16_t framesize = dataSize - EXPECT_SIZE;

    pstream = (uint8_t *)malloc(framesize * sizeof(uint8_t));

    if (!pstream) {

        std::cerr << "Memory alloction failed" << std::endl;

        close(fd);

        return false;

    }

    fdp->ConsumeData(pstream, framesize);

    int len = write(fd, pstream, framesize);

    if (len <= 0) {

        close(fd);

        free(pstream);

        pstream = nullptr;

        return false;

    }

    close(fd);

    free(pstream);

    pstream = nullptr;

    return true;

}

bool DemuxerFuzzTest(const uint8_t *data, size_t size)

{

    FuzzedDataProvider fdp(data, size);

    if (!CheckDataValidity(&fdp, size)) {

        return false;

    }

    struct Params params;

    params.time = fdp.ConsumeIntegral<int64_t>();

    char *uri = new char[URI_BUFFER_SIZE];

    if (strncpy_s(uri, URI_BUFFER_SIZE, fdp.ConsumeBytesAsString(URI_COUNT).c_str(), URI_COUNT) != 0) {

        delete[] uri;

        return false;

    }

    uri[URI_COUNT] = FLAG;

    params.setTrackType = fdp.ConsumeIntegral<int64_t>();

    params.setDuration = fdp.ConsumeIntegral<int64_t>();

    params.setHeight = fdp.ConsumeIntegral<int64_t>();

    params.setFrameRate = fdp.ConsumeIntegral<int64_t>();

    char *setLanguage = new char[LANGUAGE_BUFFER_SIZE];

    if (strncpy_s(setLanguage, LANGUAGE_BUFFER_SIZE, fdp.ConsumeBytesAsString(LANGUAGE_COUNT).c_str(),

        LANGUAGE_COUNT) != 0) {

        delete[] uri;

        delete[] setLanguage;

        return false;

    }

    setLanguage[LANGUAGE_COUNT] = FLAG;

    params.setCodecConfigSize = fdp.ConsumeIntegral<uint8_t>();

    params.sampleRate = fdp.ConsumeIntegral<int32_t>();

    params.channelCount = fdp.ConsumeIntegral<int32_t>();

    params.setVideoHeight = fdp.ConsumeIntegral<int32_t>();

    params.setVideoWidth = fdp.ConsumeIntegral<int32_t>();

    uint32_t createSize = fdp.ConsumeIntegral<uint32_t>();

    shared_ptr<DemuxerSample> demuxerSample = make_shared<DemuxerSample>();

    demuxerSample->filePath = CAF_PATH;

    demuxerSample->RunNormalDemuxerApi11(createSize, uri, setLanguage, params);

    delete[] uri;

    delete[] setLanguage;

    int ret = remove(CAF_PATH);

    if (ret != 0) {

        return false;

    }

    return true;

}

} // namespace OHOS



/* Fuzzer entry point */

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    /* Run your code on data */

    OHOS::DemuxerFuzzTest(data, size);

    return 0;

}