//=========================================================================
// FILENAME : tagutils-opus.c
// DESCRIPTION  : Opus metadata reader
//=========================================================================

static int
_get_opusfileinfo(char *filename, struct song_metadata *psong)
{
    OggOpusFile *opusfile;
    const OpusTags *tags;
    char **comment;
    int *commentlen;
    int j, e;


    opusfile = op_open_file (filename, &e);
    if(!opusfile)
    {
        DPRINTF(E_WARN, L_SCANNER,
            "Error opening input file \"%s\": %s\n", filename, opus_strerror(e));
        return -1;
    }

    DPRINTF(E_MAXDEBUG, L_SCANNER, "Processing file \"%s\"...\n", filename);

    psong->song_length = op_pcm_total (opusfile, -1);
    if (psong->song_length < 0)
    {
        DPRINTF(E_WARN, L_SCANNER,
                "Unable to obtain length of %s\n", filename);
        psong->song_length = 0;
    } else
        /* Sample rate is always 48k, so length in ms is just samples/48 */
        psong->song_length /= 48;

    /* Note that this gives only the first link's channel count. */
    psong->channels = op_channel_count (opusfile, -1);

    psong->samplerate = 48000;
    psong->bitrate = op_bitrate (opusfile, -1);

    tags = op_tags (opusfile, -1);

    if (!tags)
    {
        DPRINTF(E_WARN, L_SCANNER, "Unable to obtain tags from %s\n",
                filename);
        return -1;
    }

    comment = tags->user_comments;
    commentlen = tags->comment_lengths; 

    for (j = 0; j < tags->comments; j++)
        vc_scan (psong, *(comment++), *(commentlen++));

    op_free (opusfile);
    return 0;
}