/* 

 * Copyright (C) 2023 Teluu Inc. (http://www.teluu.com)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

 */

#include <stdio.h>

#include <stdint.h>

#include <stdlib.h>

#include <pjlib.h>

#include <pjmedia-codec/h264_packetizer.h>

#if defined(PJMEDIA_HAS_VIDEO) && (PJMEDIA_HAS_VIDEO != 0)

#define kMinInputLength 10

#define kMaxInputLength 5120

pj_pool_factory *mem;

int h264_unpacketizer(const uint8_t *data, size_t size,

                      uint8_t *output, size_t output_size)

{

    int ret = 0;

    pj_pool_t *pool;

    pj_status_t status;

    pjmedia_h264_packetizer_cfg cfg;

    pjmedia_h264_packetizer *pktz;

    unsigned bits_pos = 0;

    pool = pj_pool_create(mem, "h264_test", 1000, 1000, NULL);

    pj_bzero(&cfg, sizeof(cfg));

    cfg.mtu = 1500;

    cfg.unpack_nal_start = 4;

    cfg.mode = PJMEDIA_H264_PACKETIZER_MODE_NON_INTERLEAVED;

    status = pjmedia_h264_packetizer_create(pool, &cfg, &pktz);

    if (status == PJ_SUCCESS) {

        status = pjmedia_h264_unpacketize(pktz, data, size, output,

                                          output_size, &bits_pos);

    }

    pj_pool_release(pool);

    return ret;

}

extern int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)

{

    int ret = 0;

    uint8_t *data;

    uint8_t *output;

    size_t output_size;

    pj_caching_pool caching_pool;

    if (Size < kMinInputLength || Size > kMaxInputLength) {

        return 1;

    }

    /* Add null termination for the data */

    data = (uint8_t *)calloc((Size+1), sizeof(uint8_t));

    memcpy((void *)data, (void *)Data, Size);

    output_size = Size + 32;

    output = (uint8_t *)calloc(output_size, sizeof(uint8_t));

    /* Init */

    pj_init();

    pj_caching_pool_init(&caching_pool, &pj_pool_factory_default_policy, 0);

    pj_log_set_level(0);

    mem = &caching_pool.factory;

    /* Fuzz */

    ret = h264_unpacketizer(data, Size, output, output_size);

    free(data);

    free(output);

    pj_caching_pool_destroy(&caching_pool);

    return ret;

}

#else

extern int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)

{

    PJ_UNUSED_ARG(Data);

    PJ_UNUSED_ARG(Size);

    return 0;

}

#endif