/*
Copyright (C) 2005, 2008, 2009, 2011 Rocky Bernstein <rocky@gnu.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
# define __CDIO_CONFIG_H__ 1
#endif
#include <cdio/cdio.h>
#include <cdio/audio.h>
#include "cddb.h"
cddb_opts_t cddb_opts;
/*!
Returns the sum of the decimal digits in a number. Eg. 1955 = 20
*/
static int
cddb_dec_digit_sum(int n)
{
int ret=0;
for (;;) {
ret += n%10;
n = n/10;
if (!n) return ret;
}
}
/*!
Compute the CDDB disk ID for an Audio disk. This is a funny checksum
consisting of the concatenation of 3 things:
the sum of the decimal digits of sizes of all tracks,
the total length of the disk, and
the number of tracks.
*/
uint32_t
cddb_discid(CdIo_t *p_cdio, track_t i_tracks)
{
int i,t,n=0;
msf_t start_msf;
msf_t msf;
for (i = 1; i <= i_tracks; i++) {
cdio_get_track_msf(p_cdio, i, &msf);
n += cddb_dec_digit_sum(cdio_audio_get_msf_seconds(&msf));
}
cdio_get_track_msf(p_cdio, 1, &start_msf);
cdio_get_track_msf(p_cdio, CDIO_CDROM_LEADOUT_TRACK, &msf);
t = cdio_audio_get_msf_seconds(&msf)-cdio_audio_get_msf_seconds(&start_msf);
return ((n % 0xff) << 24 | t << 8 | i_tracks);
}
#ifdef HAVE_CDDB
bool
init_cddb(CdIo_t *p_cdio, cddb_conn_t **pp_conn, cddb_disc_t **pp_cddb_disc,
error_fn_t errmsg, track_t i_first_track, track_t i_tracks,
int *i_cddb_matches)
{
track_t i;
*pp_conn = cddb_new();
*pp_cddb_disc = NULL;
if (!*pp_conn) {
errmsg("unable to initialize libcddb");
return false;
}
if (NULL == cddb_opts.email)
cddb_set_email_address(*pp_conn, "me@home");
else
cddb_set_email_address(*pp_conn, cddb_opts.email);
if (NULL == cddb_opts.server)
cddb_set_server_name(*pp_conn, "freedb.freedb.org");
else
cddb_set_server_name(*pp_conn, cddb_opts.server);
if (cddb_opts.timeout >= 0)
cddb_set_timeout(*pp_conn, cddb_opts.timeout);
cddb_set_server_port(*pp_conn, cddb_opts.port);
if (cddb_opts.http)
cddb_http_enable(*pp_conn);
else
cddb_http_disable(*pp_conn);
if (NULL != cddb_opts.cachedir)
cddb_cache_set_dir(*pp_conn, cddb_opts.cachedir);
if (cddb_opts.disable_cache)
cddb_cache_disable(*pp_conn);
*pp_cddb_disc = cddb_disc_new();
if (!*pp_cddb_disc) {
errmsg("unable to create CDDB disc structure");
cddb_destroy(*pp_conn);
return false;
}
for(i = 0; i < i_tracks; i++) {
cddb_track_t *t = cddb_track_new();
cddb_track_set_frame_offset(t,
cdio_get_track_lba(p_cdio, i+i_first_track));
cddb_disc_add_track(*pp_cddb_disc, t);
}
cddb_disc_set_length(*pp_cddb_disc,
cdio_get_track_lba(p_cdio, CDIO_CDROM_LEADOUT_TRACK)
/ CDIO_CD_FRAMES_PER_SEC);
if (!cddb_disc_calc_discid(*pp_cddb_disc)) {
errmsg("libcddb calc discid failed.");
cddb_destroy(*pp_conn);
return false;
}
*i_cddb_matches = cddb_query(*pp_conn, *pp_cddb_disc);
if (-1 == *i_cddb_matches)
errmsg(cddb_error_str(cddb_errno(*pp_conn)));
cddb_read(*pp_conn, *pp_cddb_disc);
return true;
}
#endif /*HAVE_CDDB*/