Function of_add_attachments

fftools/ffmpeg_mux_init.c:1902–1983

}

static int of_add_attachments(Muxer *mux, const OptionsContext *o)
{
    MuxStream *ms;
    OutputStream *ost;
    int err;

    for (int i = 0; i < o->nb_attachments; i++) {
        AVIOContext *pb;
        uint8_t *attachment;
        char *attachment_filename;
        const char *p;
        int64_t len;

        if ((err = avio_open2(&pb, o->attachments[i], AVIO_FLAG_READ, &int_cb, NULL)) < 0) {
            av_log(mux, AV_LOG_FATAL, "Could not open attachment file %s.\n",
                   o->attachments[i]);
            return err;
        }
        if ((len = avio_size(pb)) <= 0) {
            av_log(mux, AV_LOG_FATAL, "Could not get size of the attachment %s.\n",
                   o->attachments[i]);
            err = len ? len : AVERROR_INVALIDDATA;
            goto read_fail;
        }
        if (len > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
            av_log(mux, AV_LOG_FATAL, "Attachment %s too large.\n",
                   o->attachments[i]);
            err = AVERROR(ERANGE);
            goto read_fail;
        }

        attachment = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE);
        if (!attachment) {
            err = AVERROR(ENOMEM);
            goto read_fail;
        }

        err = avio_read(pb, attachment, len);
        if (err < 0)
            av_log(mux, AV_LOG_FATAL, "Error reading attachment file %s: %s\n",
                   o->attachments[i], av_err2str(err));
        else if (err != len) {
            av_log(mux, AV_LOG_FATAL, "Could not read all %"PRId64" bytes for "
                   "attachment file %s\n", len, o->attachments[i]);
            err = AVERROR(EIO);
        }

read_fail:
        avio_closep(&pb);
        if (err < 0)
            return err;

        memset(attachment + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);

        av_log(mux, AV_LOG_VERBOSE, "Creating attachment stream from file %s\n",
               o->attachments[i]);

        attachment_filename = av_strdup(o->attachments[i]);