Function opt_match_per_stream

fftools/ffmpeg_opt.c:181–229

}

static unsigned opt_match_per_stream(void *logctx, enum OptionType type,
                                     const SpecifierOptList *sol,
                                     AVFormatContext *fc, AVStream *st)
{
    int matches = 0, match_idx = -1;

    av_assert0((type == sol->type) || !sol->nb_opt);

    for (int i = 0; i < sol->nb_opt; i++) {
        const StreamSpecifier *ss = &sol->opt[i].stream_spec;

        if (stream_specifier_match(ss, fc, st, logctx)) {
            match_idx = i;
            matches++;
        }
    }

    if (matches > 1 && sol->opt_canon) {
        const SpecifierOpt *so = &sol->opt[match_idx];
        const char *spec = so->specifier && so->specifier[0] ? so->specifier : "";

        char namestr[128] = "";
        char optval_buf[32];
        const char *optval = optval_buf;

        snprintf(namestr, sizeof(namestr), "-%s", sol->opt_canon->name);
        if (sol->opt_canon->flags & OPT_HAS_ALT) {
            const char * const *names_alt = sol->opt_canon->u1.names_alt;
            for (int i = 0; names_alt[i]; i++)
                av_strlcatf(namestr, sizeof(namestr), "/-%s", names_alt[i]);
        }

        switch (sol->type) {
        case OPT_TYPE_STRING: optval = so->u.str;                                             break;
        case OPT_TYPE_INT:    snprintf(optval_buf, sizeof(optval_buf), "%d", so->u.i);        break;
        case OPT_TYPE_INT64:  snprintf(optval_buf, sizeof(optval_buf), "%"PRId64, so->u.i64); break;
        case OPT_TYPE_FLOAT:  snprintf(optval_buf, sizeof(optval_buf), "%f", so->u.f);        break;
        case OPT_TYPE_DOUBLE: snprintf(optval_buf, sizeof(optval_buf), "%f", so->u.dbl);      break;
        default: av_assert0(0);
        }

        av_log(logctx, AV_LOG_WARNING, "Multiple %s options specified for "
               "stream %d, only the last option '-%s%s%s %s' will be used.\n",
               namestr, st->index, sol->opt_canon->name, spec[0] ? ":" : "",
               spec, optval);
    }

    return match_idx + 1;
}

#define OPT_MATCH_PER_STREAM(name, type, opt_type, m)                                   \
void opt_match_per_stream_ ## name(void *logctx, const SpecifierOptList *sol,           \