Function seek_test

tests/api/api-seek-test.c:186–293

}

static int seek_test(const char *input_filename, const char *start, const char *end)
{
    const AVCodec *codec = NULL;
    AVCodecContext *ctx= NULL;
    AVCodecParameters *origin_par = NULL;
    AVPacket *pkt = NULL;
    AVFrame *fr = NULL;
    AVFormatContext *fmt_ctx = NULL;
    int video_stream;
    int result;
    int i, j;
    long int start_ts, end_ts;

    size_of_array = 0;
    number_of_elements = 0;
    crc_array = NULL;
    pts_array = NULL;

    result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
    if (result < 0) {
        av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
        return result;
    }

    result = avformat_find_stream_info(fmt_ctx, NULL);
    if (result < 0) {
        av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
        goto end;
    }

    start_ts = read_seek_range(start);
    end_ts = read_seek_range(end);
    if ((start_ts < 0) || (end_ts < 0)) {
        result = -1;
        goto end;
    }

    //TODO: add ability to work with audio format
    video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
    if (video_stream < 0) {
      av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
      result = video_stream;
      goto end;
    }

    origin_par = fmt_ctx->streams[video_stream]->codecpar;

    codec = avcodec_find_decoder(origin_par->codec_id);
    if (!codec) {
        av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
        result = AVERROR_DECODER_NOT_FOUND;
        goto end;
    }

    ctx = avcodec_alloc_context3(codec);
    if (!ctx) {
        av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n");
        result = AVERROR(ENOMEM);