xref: /aosp_15_r20/external/aac/fuzzer/aac_enc_fuzzer.cpp (revision e54365361535b070c2db7374cec45c159c7d0e7a)

/******************************************************************************
 *
 * 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 <string>
#include "aacenc_lib.h"
#include "src/aacenc.h"

using namespace std;

// IN_AUDIO_DATA, IN_ANCILLRY_DATA and IN_METADATA_SETUP
constexpr size_t kMaxBuffers = 3;

constexpr size_t kMaxOutputBufferSize = 8192;

constexpr uint32_t kMinBitRate = 8000;
constexpr uint32_t kMaxBitRate = 960000;

constexpr int32_t kSampleRates[] = {8000,  11025, 12000, 16000, 22050, 24000,
                                    32000, 44100, 48000, 64000, 88200, 96000};
constexpr size_t kSampleRatesSize = size(kSampleRates);

constexpr CHANNEL_MODE kChannelModes[] = {MODE_1,
                                          MODE_2,
                                          MODE_1_2,
                                          MODE_1_2_1,
                                          MODE_1_2_2,
                                          MODE_1_2_2_1,
                                          MODE_1_2_2_2_1,
                                          MODE_6_1,
                                          MODE_7_1_BACK,
                                          MODE_7_1_TOP_FRONT,
                                          MODE_7_1_REAR_SURROUND,
                                          MODE_7_1_FRONT_CENTER,
                                          MODE_212};
constexpr size_t kChannelModesSize = size(kChannelModes);

constexpr TRANSPORT_TYPE kIdentifiers[] = {
    TT_MP4_RAW, TT_MP4_ADIF, TT_MP4_ADTS, TT_MP4_LATM_MCP1, TT_MP4_LATM_MCP0, TT_MP4_LOAS, TT_DRM};
constexpr size_t kIdentifiersSize = size(kIdentifiers);

constexpr AUDIO_OBJECT_TYPE kAudioObjectTypes[] = {AOT_NONE,        AOT_NULL_OBJECT,
                                                   AOT_AAC_MAIN,    AOT_AAC_LC,
                                                   AOT_AAC_SSR,     AOT_AAC_LTP,
                                                   AOT_SBR,         AOT_AAC_SCAL,
                                                   AOT_TWIN_VQ,     AOT_CELP,
                                                   AOT_HVXC,        AOT_RSVD_10,
                                                   AOT_RSVD_11,     AOT_TTSI,
                                                   AOT_MAIN_SYNTH,  AOT_WAV_TAB_SYNTH,
                                                   AOT_GEN_MIDI,    AOT_ALG_SYNTH_AUD_FX,
                                                   AOT_ER_AAC_LC,   AOT_RSVD_18,
                                                   AOT_ER_AAC_LTP,  AOT_ER_AAC_SCAL,
                                                   AOT_ER_TWIN_VQ,  AOT_ER_BSAC,
                                                   AOT_ER_AAC_LD,   AOT_ER_CELP,
                                                   AOT_ER_HVXC,     AOT_ER_HILN,
                                                   AOT_ER_PARA,     AOT_RSVD_28,
                                                   AOT_PS,          AOT_MPEGS,
                                                   AOT_ESCAPE,      AOT_MP3ONMP4_L1,
                                                   AOT_MP3ONMP4_L2, AOT_MP3ONMP4_L3,
                                                   AOT_RSVD_35,     AOT_RSVD_36,
                                                   AOT_AAC_SLS,     AOT_SLS,
                                                   AOT_ER_AAC_ELD,  AOT_USAC,
                                                   AOT_SAOC,        AOT_LD_MPEGS,
                                                   AOT_MP2_AAC_LC,  AOT_MP2_SBR,
                                                   AOT_DRM_AAC,     AOT_DRM_SBR,
                                                   AOT_DRM_MPEG_PS, AOT_DRM_SURROUND,
                                                   AOT_DRM_USAC};

constexpr size_t kAudioObjectTypesSize = size(kAudioObjectTypes);

constexpr int32_t kSbrRatios[] = {-1, 0, 1, 2};
constexpr size_t kSbrRatiosSize = size(kSbrRatios);

constexpr int32_t kBitRateModes[] = {
    AACENC_BR_MODE_INVALID, AACENC_BR_MODE_CBR,   AACENC_BR_MODE_VBR_1,
    AACENC_BR_MODE_VBR_2,   AACENC_BR_MODE_VBR_3, AACENC_BR_MODE_VBR_4,
    AACENC_BR_MODE_VBR_5,   AACENC_BR_MODE_FF,    AACENC_BR_MODE_SFR};
constexpr size_t kBitRateModesSize = size(kBitRateModes);

constexpr int32_t kGranuleLengths[] = {120, 128, 240, 256, 480, 512, 1024};
constexpr size_t kGranuleLengthsSize = size(kGranuleLengths);

constexpr int32_t kChannelOrder[] = {CH_ORDER_MPEG, CH_ORDER_WAV};
constexpr size_t kChannelOrderSize = size(kChannelOrder);

constexpr int32_t kSignalingModes[] = {-1, 0, 1, 2, 3};
constexpr size_t kSignalingModesSize = size(kSignalingModes);

constexpr int32_t kAudioMuxVer[] = {-1, 0, 1, 2};
constexpr size_t kAudioMuxVerSize = size(kAudioMuxVer);

constexpr int32_t kSbrModes[] = {-1, 0, 1, 2};
constexpr size_t kSbrModesSize = size(kSbrModes);

constexpr AACENC_METADATA_DRC_PROFILE kMetaDataDrcProfiles[] = {
    AACENC_METADATA_DRC_NONE,       AACENC_METADATA_DRC_FILMSTANDARD,
    AACENC_METADATA_DRC_FILMLIGHT,  AACENC_METADATA_DRC_MUSICSTANDARD,
    AACENC_METADATA_DRC_MUSICLIGHT, AACENC_METADATA_DRC_SPEECH,
    AACENC_METADATA_DRC_NOT_PRESENT};
constexpr size_t kMetaDataDrcProfilesSize = size(kMetaDataDrcProfiles);

enum {
    IDX_SBR_MODE = 0,
    IDX_AAC_AOT,
    IDX_SAMPLE_RATE,
    IDX_BIT_RATE_1,
    IDX_BIT_RATE_2,
    IDX_BIT_RATE_3,
    IDX_CHANNEL,
    IDX_IDENTIFIER,
    IDX_SBR_RATIO,
    IDX_METADATA_DRC_PROFILE,
    IDX_METADATA_COMP_PROFILE,
    IDX_METADATA_DRC_TARGET_REF_LEVEL,
    IDX_METADATA_COMP_TARGET_REF_LEVEL,
    IDX_METADATA_PROG_LEVEL_PRESENT,
    IDX_METADATA_PROG_LEVEL,
    IDX_METADATA_PCE_MIXDOWN_IDX_PRESENT,
    IDX_METADATA_ETSI_DMXLVL_PRESENT,
    IDX_METADATA_CENTER_MIX_LEVEL,
    IDX_METADATA_SURROUND_MIX_LEVEL,
    IDX_METADATA_DOLBY_SURROUND_MODE,
    IDX_METADATA_DRC_PRESENTATION_MODE,
    IDX_METADATA_EXT_ANC_DATA_ENABLE,
    IDX_METADATA_EXT_DOWNMIX_LEVEL_ENABLE,
    IDX_METADATA_EXT_DOWNMIX_LEVEL_A,
    IDX_METADATA_EXT_DOWNMIX_LEVEL_B,
    IDX_METADATA_DMX_GAIN_ENABLE,
    IDX_METADATA_DMX_GAIN_5,
    IDX_METADATA_DMX_GAIN_2,
    IDX_METADATA_LFE_DMX_ENABLE,
    IDX_METADATA_LFE_DMX_LEVEL,
    IDX_IN_BUFFER_INDEX_1,
    IDX_IN_BUFFER_INDEX_2,
    IDX_IN_BUFFER_INDEX_3,
    IDX_BIT_RATE_MODE,
    IDX_GRANULE_LENGTH,
    IDX_CHANNELORDER,
    IDX_AFTERBURNER,
    IDX_BANDWIDTH,
    IDX_PEAK_BITRATE,
    IDX_HEADER_PERIOD,
    IDX_SIGNALING_MODE,
    IDX_TPSUBFRAMES,
    IDX_AUDIOMUXVER,
    IDX_PROTECTION,
    IDX_ANCILLARY_BITRATE,
    IDX_METADATA_MODE,
    IDX_LAST
};

template <typename type1, typename type2, typename type3>
auto generateNumberInRangeFromData(type1 data, type2 min, type3 max) -> decltype(max) {
    return (data % (1 + max - min)) + min;
}

class Codec {
   public:
    ~Codec() { deInitEncoder(); }
    bool initEncoder(uint8_t **dataPtr, size_t *sizePtr);
    void encodeFrames(const uint8_t *data, size_t size);
    void deInitEncoder();

   private:
    template <typename type1, typename type2, typename type3>
    void setAACParam(type1 data, const AACENC_PARAM aacParam, type2 min, type2 max,
                     const type3 *array = nullptr);
    void setupMetaData(uint8_t *data);

    HANDLE_AACENCODER mEncoder = nullptr;
    AACENC_MetaData mMetaData = {};
    uint32_t mInBufferIdx_1 = 0;
    uint32_t mInBufferIdx_2 = 0;
    uint32_t mInBufferIdx_3 = 0;
};

void Codec::setupMetaData(uint8_t *data) {
    uint32_t drcProfileIndex = generateNumberInRangeFromData(data[IDX_METADATA_DRC_PROFILE], 0,
                                                             kMetaDataDrcProfilesSize - 1);
    AACENC_METADATA_DRC_PROFILE drcProfile = kMetaDataDrcProfiles[drcProfileIndex];
    mMetaData.drc_profile = drcProfile;

    uint32_t compProfileIndex = generateNumberInRangeFromData(data[IDX_METADATA_COMP_PROFILE], 0,
                                                              kMetaDataDrcProfilesSize - 1);
    AACENC_METADATA_DRC_PROFILE compProfile = kMetaDataDrcProfiles[compProfileIndex];
    mMetaData.comp_profile = compProfile;

    INT drcTargetRefLevel =
        generateNumberInRangeFromData(data[IDX_METADATA_DRC_TARGET_REF_LEVEL], 0, UINT8_MAX);
    mMetaData.drc_TargetRefLevel = drcTargetRefLevel;

    INT compTargetRefLevel =
        generateNumberInRangeFromData(data[IDX_METADATA_COMP_TARGET_REF_LEVEL], 0, UINT8_MAX);
    mMetaData.comp_TargetRefLevel = compTargetRefLevel;

    INT isProgRefLevelPresent =
        generateNumberInRangeFromData(data[IDX_METADATA_PROG_LEVEL_PRESENT], 0, 1);
    mMetaData.prog_ref_level_present = isProgRefLevelPresent;

    INT progRefLevel = generateNumberInRangeFromData(data[IDX_METADATA_PROG_LEVEL], 0, UINT8_MAX);
    mMetaData.prog_ref_level = progRefLevel;

    UCHAR isPCEMixdownIdxPresent =
        generateNumberInRangeFromData(data[IDX_METADATA_PCE_MIXDOWN_IDX_PRESENT], 0, 1);
    mMetaData.PCE_mixdown_idx_present = isPCEMixdownIdxPresent;

    UCHAR isETSIDmxLvlPresent =
        generateNumberInRangeFromData(data[IDX_METADATA_ETSI_DMXLVL_PRESENT], 0, 1);
    mMetaData.ETSI_DmxLvl_present = isETSIDmxLvlPresent;

    SCHAR centerMixLevel = generateNumberInRangeFromData(data[IDX_METADATA_CENTER_MIX_LEVEL], 0, 7);
    mMetaData.centerMixLevel = centerMixLevel;

    SCHAR surroundMixLevel =
        generateNumberInRangeFromData(data[IDX_METADATA_SURROUND_MIX_LEVEL], 0, 7);
    mMetaData.surroundMixLevel = surroundMixLevel;

    UCHAR dolbySurroundMode =
        generateNumberInRangeFromData(data[IDX_METADATA_DOLBY_SURROUND_MODE], 0, 2);
    mMetaData.dolbySurroundMode = dolbySurroundMode;

    UCHAR drcPresentationMode =
        generateNumberInRangeFromData(data[IDX_METADATA_DRC_PRESENTATION_MODE], 0, 2);
    mMetaData.drcPresentationMode = drcPresentationMode;

    UCHAR extAncDataEnable =
        generateNumberInRangeFromData(data[IDX_METADATA_EXT_ANC_DATA_ENABLE], 0, 1);
    mMetaData.ExtMetaData.extAncDataEnable = extAncDataEnable;

    UCHAR extDownmixLevelEnable =
        generateNumberInRangeFromData(data[IDX_METADATA_EXT_DOWNMIX_LEVEL_ENABLE], 0, 1);
    mMetaData.ExtMetaData.extDownmixLevelEnable = extDownmixLevelEnable;

    UCHAR extDownmixLevel_A =
        generateNumberInRangeFromData(data[IDX_METADATA_EXT_DOWNMIX_LEVEL_A], 0, 7);
    mMetaData.ExtMetaData.extDownmixLevel_A = extDownmixLevel_A;

    UCHAR extDownmixLevel_B =
        generateNumberInRangeFromData(data[IDX_METADATA_EXT_DOWNMIX_LEVEL_B], 0, 7);
    mMetaData.ExtMetaData.extDownmixLevel_B = extDownmixLevel_B;

    UCHAR dmxGainEnable = generateNumberInRangeFromData(data[IDX_METADATA_DMX_GAIN_ENABLE], 0, 1);
    mMetaData.ExtMetaData.dmxGainEnable = dmxGainEnable;

    INT dmxGain5 = generateNumberInRangeFromData(data[IDX_METADATA_DMX_GAIN_5], 0, UINT8_MAX);
    mMetaData.ExtMetaData.dmxGain5 = dmxGain5;

    INT dmxGain2 = generateNumberInRangeFromData(data[IDX_METADATA_DMX_GAIN_2], 0, UINT8_MAX);
    mMetaData.ExtMetaData.dmxGain2 = dmxGain2;

    UCHAR lfeDmxEnable = generateNumberInRangeFromData(data[IDX_METADATA_LFE_DMX_ENABLE], 0, 1);
    mMetaData.ExtMetaData.lfeDmxEnable = lfeDmxEnable;

    UCHAR lfeDmxLevel = generateNumberInRangeFromData(data[IDX_METADATA_LFE_DMX_LEVEL], 0, 15);
    mMetaData.ExtMetaData.lfeDmxLevel = lfeDmxLevel;
}

template <typename type1, typename type2, typename type3>
void Codec::setAACParam(type1 data, const AACENC_PARAM aacParam, type2 min, type2 max,
                        const type3 *array) {
    auto value = 0;
    if (array) {
        uint32_t index = generateNumberInRangeFromData(data, min, max);
        value = array[index];
    } else {
        value = generateNumberInRangeFromData(data, min, max);
    }
    aacEncoder_SetParam(mEncoder, aacParam, value);
    (void)aacEncoder_GetParam(mEncoder, aacParam);
}

bool Codec::initEncoder(uint8_t **dataPtr, size_t *sizePtr) {
    uint8_t *data = *dataPtr;

    if (AACENC_OK != aacEncOpen(&mEncoder, 0, 0)) {
        return false;
    }

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_SBR_MODE], AACENC_SBR_MODE, 0, kSbrModesSize - 1,
                                          kSbrModes);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_SBR_RATIO], AACENC_SBR_RATIO, 0,
                                          kSbrRatiosSize - 1, kSbrRatios);

    setAACParam<uint8_t, size_t, AUDIO_OBJECT_TYPE>(data[IDX_AAC_AOT], AACENC_AOT, 0,
                                                    kAudioObjectTypesSize - 1, kAudioObjectTypes);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_SAMPLE_RATE], AACENC_SAMPLERATE, 0,
                                          kSampleRatesSize - 1, kSampleRates);

    uint32_t tempValue =
        (data[IDX_BIT_RATE_1] << 16) | (data[IDX_BIT_RATE_2] << 8) | data[IDX_BIT_RATE_3];
    setAACParam<uint8_t, uint32_t, uint32_t>(tempValue, AACENC_BITRATE, kMinBitRate, kMaxBitRate);

    setAACParam<uint8_t, size_t, CHANNEL_MODE>(data[IDX_CHANNEL], AACENC_CHANNELMODE, 0,
                                               kChannelModesSize - 1, kChannelModes);

    setAACParam<uint8_t, size_t, TRANSPORT_TYPE>(data[IDX_IDENTIFIER], AACENC_TRANSMUX, 0,
                                                 kIdentifiersSize - 1, kIdentifiers);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_BIT_RATE_MODE], AACENC_BITRATEMODE, 0,
                                          kBitRateModesSize - 1, kBitRateModes);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_GRANULE_LENGTH], AACENC_GRANULE_LENGTH, 0,
                                          kGranuleLengthsSize - 1, kGranuleLengths);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_CHANNELORDER], AACENC_CHANNELORDER, 0,
                                          kChannelOrderSize - 1, kChannelOrder);

    setAACParam<uint8_t, int32_t, int32_t>(data[IDX_AFTERBURNER], AACENC_AFTERBURNER, 0, 1);

    setAACParam<uint8_t, int32_t, int32_t>(data[IDX_BANDWIDTH], AACENC_BANDWIDTH, 0, 1);

    setAACParam<uint8_t, uint32_t, uint32_t>(data[IDX_PEAK_BITRATE], AACENC_PEAK_BITRATE,
                                             kMinBitRate, kMinBitRate);

    setAACParam<uint8_t, uint32_t, uint32_t>(data[IDX_HEADER_PERIOD], AACENC_HEADER_PERIOD, 0,
                                             UINT8_MAX);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_SIGNALING_MODE], AACENC_SIGNALING_MODE, 0,
                                          kSignalingModesSize - 1, kSignalingModes);

    setAACParam<uint8_t, uint32_t, uint32_t>(data[IDX_TPSUBFRAMES], AACENC_TPSUBFRAMES, 0,
                                             UINT8_MAX);

    setAACParam<uint8_t, size_t, int32_t>(data[IDX_AUDIOMUXVER], AACENC_AUDIOMUXVER, 0,
                                          kAudioMuxVerSize - 1, kAudioMuxVer);

    setAACParam<uint8_t, uint32_t, uint32_t>(data[IDX_PROTECTION], AACENC_PROTECTION, 0, 1);

    setAACParam<uint8_t, uint32_t, uint32_t>(data[IDX_ANCILLARY_BITRATE], AACENC_ANCILLARY_BITRATE,
                                             0, kMaxBitRate);

    setAACParam<uint8_t, uint32_t, uint32_t>(data[IDX_METADATA_MODE], AACENC_METADATA_MODE, 0, 3);

    AACENC_InfoStruct encInfo;
    aacEncInfo(mEncoder, &encInfo);

    mInBufferIdx_1 = generateNumberInRangeFromData(data[IDX_IN_BUFFER_INDEX_1], 0, kMaxBuffers - 1);
    mInBufferIdx_2 = generateNumberInRangeFromData(data[IDX_IN_BUFFER_INDEX_2], 0, kMaxBuffers - 1);
    mInBufferIdx_3 = generateNumberInRangeFromData(data[IDX_IN_BUFFER_INDEX_3], 0, kMaxBuffers - 1);

    setupMetaData(data);

    // Not re-using the data which was used for configuration for encoding
    *dataPtr += IDX_LAST;
    *sizePtr -= IDX_LAST;

    return true;
}

static void deleteBuffers(uint8_t **buffers, size_t size) {
    for (size_t n = 0; n < size; ++n) {
        delete[] buffers[n];
    }
    delete[] buffers;
}

void Codec::encodeFrames(const uint8_t *data, size_t size) {
    uint8_t *audioData = (uint8_t *)data;
    uint8_t *ancData = (uint8_t *)data;
    size_t audioSize = size;
    size_t ancSize = size;

    while ((audioSize > 0) && (ancSize > 0)) {
        AACENC_InArgs inargs;
        memset(&inargs, 0, sizeof(inargs));
        inargs.numInSamples = audioSize / sizeof(int16_t);
        inargs.numAncBytes = ancSize;

        void *buffers[] = {(void *)audioData, (void *)ancData, &mMetaData};
        INT bufferIds[] = {IN_AUDIO_DATA, IN_ANCILLRY_DATA, IN_METADATA_SETUP};
        INT bufferSizes[] = {static_cast<INT>(audioSize), static_cast<INT>(ancSize),
                             static_cast<INT>(sizeof(mMetaData))};
        INT bufferElSizes[] = {sizeof(int16_t), sizeof(UCHAR), sizeof(AACENC_MetaData)};

        void *inBuffer[kMaxBuffers] = {};
        INT inBufferIds[kMaxBuffers] = {};
        INT inBufferSize[kMaxBuffers] = {};
        INT inBufferElSize[kMaxBuffers] = {};
        for (int32_t buffer = 0; buffer < kMaxBuffers; ++buffer) {
            uint32_t Idxs[] = {mInBufferIdx_1, mInBufferIdx_2, mInBufferIdx_3};
            inBuffer[buffer] = buffers[Idxs[buffer]];
            inBufferIds[buffer] = bufferIds[Idxs[buffer]];
            inBufferSize[buffer] = bufferSizes[Idxs[buffer]];
            inBufferElSize[buffer] = bufferElSizes[Idxs[buffer]];
        }

        AACENC_BufDesc inBufDesc;
        inBufDesc.numBufs = kMaxBuffers;
        inBufDesc.bufs = (void **)&inBuffer;
        inBufDesc.bufferIdentifiers = inBufferIds;
        inBufDesc.bufSizes = inBufferSize;
        inBufDesc.bufElSizes = inBufferElSize;

        uint8_t **outPtrRef = new uint8_t *[kMaxBuffers];
        for (int32_t buffer = 0; buffer < kMaxBuffers; ++buffer) {
            outPtrRef[buffer] = new uint8_t[kMaxOutputBufferSize];
        }

        void *outBuffer[kMaxBuffers];
        INT outBufferIds[kMaxBuffers];
        INT outBufferSize[kMaxBuffers];
        INT outBufferElSize[kMaxBuffers];

        for (int32_t buffer = 0; buffer < kMaxBuffers; ++buffer) {
            outBuffer[buffer] = outPtrRef[buffer];
            outBufferIds[buffer] = OUT_BITSTREAM_DATA;
            outBufferSize[buffer] = (INT)kMaxOutputBufferSize;
            outBufferElSize[buffer] = sizeof(UCHAR);
        }

        AACENC_BufDesc outBufDesc;
        outBufDesc.numBufs = kMaxBuffers;
        outBufDesc.bufs = (void **)&outBuffer;
        outBufDesc.bufferIdentifiers = outBufferIds;
        outBufDesc.bufSizes = outBufferSize;
        outBufDesc.bufElSizes = outBufferElSize;

        AACENC_OutArgs outargs = {};
        aacEncEncode(mEncoder, &inBufDesc, &outBufDesc, &inargs, &outargs);

        if (outargs.numOutBytes == 0) {
            if (audioSize > 0) {
                ++audioData;
                --audioSize;
            }
            if (ancSize > 0) {
                ++ancData;
                --ancSize;
            }
        } else {
            size_t audioConsumed = outargs.numInSamples * sizeof(int16_t);
            audioData += audioConsumed;
            audioSize -= audioConsumed;

            size_t ancConsumed = outargs.numAncBytes;
            ancData += ancConsumed;
            ancSize -= ancConsumed;
        }
        deleteBuffers(outPtrRef, kMaxBuffers);

        // break out of loop if only metadata was sent in all the input buffers
        // as sending it multiple times in a loop is redundant.
        if ((mInBufferIdx_1 == kMaxBuffers - 1) && (mInBufferIdx_2 == kMaxBuffers - 1) &&
            (mInBufferIdx_3 == kMaxBuffers - 1)) {
            break;
        }
    }
}

void Codec::deInitEncoder() { aacEncClose(&mEncoder); }

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
    if (size < IDX_LAST) {
        return 0;
    }
    Codec encoder;
    if (encoder.initEncoder(const_cast<uint8_t **>(&data), &size)) {
        encoder.encodeFrames(data, size);
    }
    return 0;
}