Function concat_parse_script

libavformat/concatdec.c:461–659

};

static int concat_parse_script(AVFormatContext *avf)
{
    ConcatContext *cat = avf->priv_data;
    unsigned nb_files_alloc = 0;
    AVBPrint bp;
    uint8_t *cursor, *keyword;
    ConcatFile *file = NULL;
    AVStream *stream = NULL;
    AVChapter *chapter = NULL;
    unsigned line = 0, arg;
    const ParseSyntax *dir;
    char *arg_kw[MAX_ARGS];
    char *arg_str[MAX_ARGS] = { 0 };
    int64_t arg_int[MAX_ARGS];
    int ret;

    av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);

    while ((ret = ff_read_line_to_bprint_overwrite(avf->pb, &bp)) >= 0) {
        line++;
        cursor = bp.str;
        keyword = get_keyword(&cursor);
        if (!*keyword || *keyword == '#')
            continue;
        for (dir = syntax; dir < syntax + FF_ARRAY_ELEMS(syntax); dir++)
            if (!strcmp(dir->keyword, keyword))
                break;
        if (dir >= syntax + FF_ARRAY_ELEMS(syntax)) {
            av_log(avf, AV_LOG_ERROR, "Line %d: unknown keyword '%s'\n",
                   line, keyword);
            FAIL(AVERROR_INVALIDDATA);
        }

        /* Flags check */
        if ((dir->flags & NEEDS_UNSAFE) && cat->safe) {
            av_log(avf, AV_LOG_ERROR, "Line %d: %s not allowed if safe\n", line, keyword);
            FAIL(AVERROR_INVALIDDATA);
        }
        if ((dir->flags & NEEDS_FILE) && !cat->nb_files) {
            av_log(avf, AV_LOG_ERROR, "Line %d: %s without file\n", line, keyword);
            FAIL(AVERROR_INVALIDDATA);
        }
        if ((dir->flags & NEEDS_STREAM) && !avf->nb_streams) {
            av_log(avf, AV_LOG_ERROR, "Line %d: %s without stream\n", line, keyword);
            FAIL(AVERROR_INVALIDDATA);
        }

        /* Arguments parsing */
        for (arg = 0; arg < FF_ARRAY_ELEMS(dir->args) && dir->args[arg]; arg++) {
            switch (dir->args[arg]) {
            case 'd': /* duration */
                arg_kw[arg] = get_keyword(&cursor);
                ret = av_parse_time(&arg_int[arg], arg_kw[arg], 1);
                if (ret < 0) {
                    av_log(avf, AV_LOG_ERROR, "Line %d: invalid duration '%s'\n",
                           line, arg_kw[arg]);
                    goto fail;
                }