/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdio.h>#include <stdlib.h>#include <inttypes.h>#include <string.h>#include "libavcodec/avcodec.h"#include "libavutil/error.h"   static int setup_side_data_entry(AVPacket* avpkt){    const uint8_t *data_name = NULL;    int ret = 0, bytes;    uint8_t *extra_data = NULL;      /* get side_data_name string */    data_name = av_packet_side_data_name(AV_PKT_DATA_NEW_EXTRADATA);     /* Allocate a memory bloc */    bytes = strlen(data_name);     if(!(extra_data = av_malloc(bytes))){        ret = AVERROR(ENOMEM);        fprintf(stderr, "Error occurred: %s\n", av_err2str(ret));        exit(1);    }    /* copy side_data_name to extra_data array */    memcpy(extra_data, data_name, bytes);     /* create side data for AVPacket */    ret = av_packet_add_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA,                                        extra_data, bytes);    if(ret < 0){        fprintf(stderr,                "Error occurred in av_packet_add_side_data: %s\n",                av_err2str(ret));    }     return ret;} static int initializations(AVPacket* avpkt){    const static uint8_t* data = "selftest for av_packet_clone(...)";    int ret = 0;     /* initialize avpkt */    av_init_packet(avpkt);     /* set values for avpkt */    avpkt->pts = 17;    avpkt->dts = 2;    avpkt->data = (uint8_t*)data;    avpkt->size = strlen(data);    avpkt->flags = AV_PKT_FLAG_DISCARD;    avpkt->duration = 100;    avpkt->pos = 3;     ret = setup_side_data_entry(avpkt);     return ret;} int main(void){    AVPacket avpkt;    AVPacket *avpkt_clone = NULL;    int ret = 0;     if(initializations(&avpkt) < 0){        printf("failed to initialize variables\n");        return 1;    }    /* test av_packet_clone*/    avpkt_clone = av_packet_clone(&avpkt);     if(!avpkt_clone) {        av_log(NULL, AV_LOG_ERROR,"av_packet_clone failed to clone AVPacket\n");        return 1;    }    /*test av_grow_packet*/    if(av_grow_packet(avpkt_clone, 20) < 0){        av_log(NULL, AV_LOG_ERROR, "av_grow_packet failed\n");        return 1;    }    if(av_grow_packet(avpkt_clone, INT_MAX) == 0){        printf( "av_grow_packet failed to return error "                "when \"grow_by\" parameter is too large.\n" );        ret = 1;    }    /* test size error check in av_new_packet*/    if(av_new_packet(avpkt_clone, INT_MAX) == 0){        printf( "av_new_packet failed to return error "                "when \"size\" parameter is too large.\n" );        ret = 1;    }    /*test size error check in av_packet_from_data*/    if(av_packet_from_data(avpkt_clone, avpkt_clone->data, INT_MAX) == 0){        printf("av_packet_from_data failed to return error "                "when \"size\" parameter is too large.\n" );        ret = 1;    }    /*clean up*/    av_packet_free(&avpkt_clone);    av_packet_unref(&avpkt);      return ret;}