Function tee_write_header

libavformat/tee.c:451–515

}

static int tee_write_header(AVFormatContext *avf)
{
    TeeContext *tee = avf->priv_data;
    unsigned nb_slaves = 0;
    const char *filename = avf->url;
    char **slaves = NULL;
    int ret;

    while (*filename) {
        char *slave = av_get_token(&filename, slave_delim);
        if (!slave) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }
        ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
        if (ret < 0) {
            av_free(slave);
            goto fail;
        }
        if (strspn(filename, slave_delim))
            filename++;
    }

    if (!FF_ALLOCZ_TYPED_ARRAY(tee->slaves, nb_slaves)) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }
    tee->nb_slaves = tee->nb_alive = nb_slaves;

    for (unsigned i = 0; i < nb_slaves; i++) {

        tee->slaves[i].use_fifo = tee->use_fifo;
        ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
        if (ret < 0)
            goto fail;

        if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
            ret = tee_process_slave_failure(avf, i, ret);
            if (ret < 0)
                goto fail;
        } else {
            log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
        }
        av_freep(&slaves[i]);
    }

    for (unsigned i = 0; i < avf->nb_streams; i++) {
        int mapped = 0;
        for (unsigned j = 0; j < tee->nb_slaves; j++)
            if (tee->slaves[j].avf)
                mapped += tee->slaves[j].stream_map[i] >= 0;
        if (!mapped)
            av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
                   "to any slave.\n", i);
    }
    av_free(slaves);
    return 0;