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mpv/libmpdemux/cddb.c

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/*
* CDDB HTTP protocol
* by Bertrand Baudet <bertrand_baudet@yahoo.com>
* (C) 2002, MPlayer team.
*
* Implementation follow the freedb.howto1.06.txt specification
* from http://freedb.freedb.org
*
* discid computation by Jeremy D. Zawodny
* Copyright (c) 1998-2000 Jeremy D. Zawodny <Jeremy@Zawodny.com>
* Code release under GPL
*
*/
#include "config.h"
#if defined(HAVE_CDDA) && defined(STREAMING)
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <errno.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__bsdi__)
#define SYS_BSD 1
#endif
#if defined(__OpenBSD__)
#define SYS_OBSD 1
#endif
#if defined(__linux__)
#include <linux/cdrom.h>
#elif defined(SYS_BSD)
#include <sys/cdio.h>
#elif defined(SYS_OBSD)
#include <util.h>
#include <sys/cdio.h>
#endif
#include "cdd.h"
#include "../version.h"
#include "stream.h"
#include "network.h"
#define DEFAULT_FREEDB_SERVER "freedb.freedb.org"
#define DEFAULT_CACHE_DIR "/.cddb/"
stream_t* open_cdda(char *dev, char *track);
static cd_toc_t cdtoc[100];
#if defined(__linux__)
int
read_toc(void) {
int drive = open("/dev/cdrom", O_RDONLY | O_NONBLOCK);
struct cdrom_tochdr tochdr;
struct cdrom_tocentry tocentry;
int i;
ioctl(drive, CDROMREADTOCHDR, &tochdr);
for (i = tochdr.cdth_trk0; i <= tochdr.cdth_trk1; i++) {
tocentry.cdte_track = i;
tocentry.cdte_format = CDROM_MSF;
ioctl(drive, CDROMREADTOCENTRY, &tocentry);
cdtoc[i-1].min = tocentry.cdte_addr.msf.minute;
cdtoc[i-1].sec = tocentry.cdte_addr.msf.second;
cdtoc[i-1].frame = tocentry.cdte_addr.msf.frame;
cdtoc[i-1].frame += cdtoc[i-1].min*60*75;
cdtoc[i-1].frame += cdtoc[i-1].sec*75;
}
tocentry.cdte_track = 0xAA;
tocentry.cdte_format = CDROM_MSF;
ioctl(drive, CDROMREADTOCENTRY, &tocentry);
cdtoc[tochdr.cdth_trk1].min = tocentry.cdte_addr.msf.minute;
cdtoc[tochdr.cdth_trk1].sec = tocentry.cdte_addr.msf.second;
cdtoc[tochdr.cdth_trk1].frame = tocentry.cdte_addr.msf.frame;
cdtoc[tochdr.cdth_trk1].frame += cdtoc[tochdr.cdth_trk1].min*60*75;
cdtoc[tochdr.cdth_trk1].frame += cdtoc[tochdr.cdth_trk1].sec*75;
close(drive);
return tochdr.cdth_trk1;
}
#elif defined(SYS_BSD)
int
read_toc(void) {
int drive = open("/dev/acd0c", O_RDONLY | O_NONBLOCK);
struct ioc_toc_header tochdr;
struct ioc_read_toc_single_entry tocentry;
int i;
ioctl(drive, CDIOREADTOCHEADER, &tochdr);
for (i = tochdr.starting_track; i <= tochdr.ending_track; i++) {
tocentry.track = i;
tocentry.address_format = CD_MSF_FORMAT;
ioctl(drive, CDIOREADTOCENTRY, &tocentry);
cdtoc[i-1].min = tocentry.entry.addr.msf.minute;
cdtoc[i-1].sec = tocentry.entry.addr.msf.second;
cdtoc[i-1].frame = tocentry.entry.addr.msf.frame;
cdtoc[i-1].frame += cdtoc[i-1].min*60*75;
cdtoc[i-1].frame += cdtoc[i-1].sec*75;
}
tocentry.track = 0xAA;
tocentry.address_format = CD_MSF_FORMAT;
ioctl(drive, CDIOREADTOCENTRY, &tocentry);
cdtoc[tochdr.ending_track].min = tocentry.entry.addr.msf.minute;
cdtoc[tochdr.ending_track].sec = tocentry.entry.addr.msf.second;
cdtoc[tochdr.ending_track].frame = tocentry.entry.addr.msf.frame;
cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].min*60*75;
cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].sec*75;
close(drive);
return tochdr.ending_track;
}
#elif defined(SYS_OBSD)
int
read_toc(void) {
int drive;
struct ioc_toc_header tochdr;
struct ioc_read_toc_entry tocentry;
int i;
char *drivename;
char *realdev;
struct cd_toc_entry toc_buffer;
drivename = getenv("CDROM");
if (!drivename)
drivename = "cd0";
drive = opendev(drivename, O_RDONLY, OPENDEV_PART, &realdev);
if (!drive)
return -1;
ioctl(drive, CDIOREADTOCHEADER, &tochdr);
for (i = tochdr.starting_track; i <= tochdr.ending_track; i++) {
tocentry.starting_track = i;
tocentry.address_format = CD_MSF_FORMAT;
tocentry.data = &toc_buffer;
tocentry.data_len = sizeof(toc_buffer);
ioctl(drive, CDIOREADTOCENTRYS, &tocentry);
cdtoc[i-1].min = toc_buffer.addr.msf.minute;
cdtoc[i-1].sec = toc_buffer.addr.msf.second;
cdtoc[i-1].frame = toc_buffer.addr.msf.frame;
cdtoc[i-1].frame += cdtoc[i-1].min*60*75;
cdtoc[i-1].frame += cdtoc[i-1].sec*75;
}
tocentry.starting_track = 0xAA;
tocentry.address_format = CD_MSF_FORMAT;
ioctl(drive, CDIOREADTOCENTRYS, &tocentry);
cdtoc[tochdr.ending_track].min = toc_buffer.addr.msf.minute;
cdtoc[tochdr.ending_track].sec = toc_buffer.addr.msf.second;
cdtoc[tochdr.ending_track].frame = toc_buffer.addr.msf.frame;
cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].min*60*75;
cdtoc[tochdr.ending_track].frame += cdtoc[tochdr.ending_track].sec*75;
close(drive);
return tochdr.ending_track;
}
#endif
unsigned int
cddb_sum(int n) {
unsigned int ret;
ret = 0;
while (n > 0) {
ret += (n % 10);
n /= 10;
}
return ret;
}
unsigned long
cddb_discid(int tot_trks) {
unsigned int i, t = 0, n = 0;
i = 0;
while (i < (unsigned int)tot_trks) {
n = n + cddb_sum((cdtoc[i].min * 60) + cdtoc[i].sec);
i++;
}
t = ((cdtoc[tot_trks].min * 60) + cdtoc[tot_trks].sec) -
((cdtoc[0].min * 60) + cdtoc[0].sec);
return ((n % 0xff) << 24 | t << 8 | tot_trks);
}
int
cddb_http_request(char *command, int (*reply_parser)(HTTP_header_t*,cddb_data_t*), cddb_data_t *cddb_data) {
char request[4096];
int fd, ret = 0;
URL_t *url;
HTTP_header_t *http_hdr;
if( reply_parser==NULL || command==NULL || cddb_data==NULL ) return -1;
sprintf( request, "http://%s/~cddb/cddb.cgi?cmd=%s%s&proto=%d", cddb_data->freedb_server, command, cddb_data->cddb_hello, cddb_data->freedb_proto_level );
printf("Request[%s]\n", request );
url = url_new(request);
if( url==NULL ) {
printf("Not a valid URL\n");
return -1;
}
fd = http_send_request(url);
if( fd<0 ) {
printf("failed to send the http request\n");
return -1;
}
http_hdr = http_read_response( fd );
if( http_hdr==NULL ) {
printf("Failed to read the http response\n");
return -1;
}
http_debug_hdr(http_hdr);
printf("body=[%s]\n", http_hdr->body );
switch(http_hdr->status_code) {
case 200:
ret = reply_parser(http_hdr, cddb_data);
break;
case 400:
printf("Not Found\n");
break;
default:
printf("Unknown Error code\n");
}
http_free( http_hdr );
url_free( url );
return ret;
}
int
cddb_read_cache(cddb_data_t *cddb_data) {
char file_name[100];
struct stat stats;
int file_fd, ret;
size_t file_size;
if( cddb_data==NULL || cddb_data->cache_dir==NULL ) return -1;
sprintf( file_name, "%s%08lx", cddb_data->cache_dir, cddb_data->disc_id);
file_fd = open(file_name, O_RDONLY);
if( file_fd<0 ) {
printf("No cache found\n");
return -1;
}
ret = fstat( file_fd, &stats );
if( ret<0 ) {
perror("fstat");
file_size = 4096;
} else {
file_size = stats.st_size;
}
cddb_data->xmcd_file = (char*)malloc(file_size);
if( cddb_data->xmcd_file==NULL ) {
printf("Memory allocation failed\n");
close(file_fd);
return -1;
}
cddb_data->xmcd_file_size = read(file_fd, cddb_data->xmcd_file, file_size);
if( cddb_data->xmcd_file_size!=file_size ) {
printf("Not all the xmcd file has been read\n");
close(file_fd);
return -1;
}
close(file_fd);
return 0;
}
int
cddb_write_cache(cddb_data_t *cddb_data) {
// We have the file, save it for cache.
struct stat file_stat;
char file_name[100];
int file_fd, ret;
int wrote=0;
if( cddb_data==NULL || cddb_data->cache_dir==NULL ) return -1;
// Check if the CDDB cache dir exist
ret = stat( cddb_data->cache_dir, &file_stat );
if( ret<0 ) {
// Directory not present, create it.
ret = mkdir( cddb_data->cache_dir, 0755 );
if( ret<0 ) {
perror("mkdir");
printf("Failed to create directory %s\n", cddb_data->cache_dir );
return -1;
}
}
sprintf( file_name, "%s%08lx", cddb_data->cache_dir, cddb_data->disc_id );
file_fd = creat(file_name, S_IREAD|S_IWRITE);
if( file_fd<0 ) {
perror("create");
return -1;
}
wrote = write(file_fd, cddb_data->xmcd_file, cddb_data->xmcd_file_size);
if( wrote<0 ) {
perror("write");
close(file_fd);
return -1;
}
if( (unsigned int)wrote!=cddb_data->xmcd_file_size ) {
printf("Not all the xmcd file has been written\n");
close(file_fd);
return -1;
}
close(file_fd);
return 0;
}
int
cddb_read_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
unsigned long disc_id;
char category[100];
char *ptr=NULL, *ptr2=NULL;
int ret, status;
if( http_hdr==NULL || cddb_data==NULL ) return -1;
ret = sscanf( http_hdr->body, "%d ", &status);
if( ret!=1 ) {
printf("Parse error\n");
return -1;
}
switch(status) {
case 210:
ret = sscanf( http_hdr->body, "%d %s %08lx", &status, category, &disc_id);
if( ret!=3 ) {
printf("Parse error\n");
return -1;
}
// Check if it's a xmcd database file
ptr = strstr(http_hdr->body, "# xmcd");
if( ptr==NULL ) {
printf("Invalid xmcd database file returned\n");
return -1;
}
// Ok found the beginning of the file
// look for the end
ptr2 = strstr(ptr, "\r\n.\r\n");
if( ptr2==NULL ) {
ptr2 = strstr(ptr, "\n.\n");
if( ptr2==NULL ) {
printf("Unable to find '.'\n");
return -1;
}
}
// Ok found the end
// do a sanity check
if( http_hdr->body_size<(ptr2-ptr) ) {
printf("Unexpected fix me\n");
return -1;
}
cddb_data->xmcd_file = ptr;
cddb_data->xmcd_file_size = ptr2-ptr+2;
cddb_data->xmcd_file[cddb_data->xmcd_file_size] = '\0';
// Avoid the http_free function to free the xmcd file...save a mempcy...
http_hdr->body = NULL;
http_hdr->body_size = 0;
return cddb_write_cache(cddb_data);
default:
printf("Unhandled code\n");
}
return 0;
}
int
cddb_request_titles(cddb_data_t *cddb_data) {
char command[1024];
sprintf( command, "cddb+read+%s+%08lx", cddb_data->category, cddb_data->disc_id);
return cddb_http_request(command, cddb_read_parse, cddb_data);
}
int
cddb_query_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
char album_title[100];
char *ptr = NULL;
int ret, status;
ret = sscanf( http_hdr->body, "%d ", &status);
if( ret!=1 ) {
printf("Parse error\n");
return -1;
}
switch(status) {
case 200:
// Found exact match
ret = sscanf(http_hdr->body, "%d %s %08lx %s", &status, cddb_data->category, &(cddb_data->disc_id), album_title);
if( ret!=4 ) {
printf("Parse error\n");
return -1;
}
ptr = strstr(http_hdr->body, album_title);
if( ptr!=NULL ) {
char *ptr2;
int len;
ptr2 = strstr(ptr, "\n");
if( ptr2==NULL ) {
len = (http_hdr->body_size)-(ptr-(http_hdr->body));
} else {
len = ptr2-ptr+1;
}
strncpy(album_title, ptr, len);
album_title[len-2]='\0';
}
printf("Parse OK, found: %s\n", album_title);
return cddb_request_titles(cddb_data);
case 202:
// No match found
printf("Album not found\n");
break;
case 210:
// Found exact matches, list follows
ptr = strstr(http_hdr->body, "\n");
if( ptr==NULL ) {
printf("Unable to find end of line\n");
return -1;
}
ptr++;
// We have a list of exact matches, so which one do
// we use? So let's take the first one.
ret = sscanf(ptr, "%s %08lx %s", cddb_data->category, &(cddb_data->disc_id), album_title);
if( ret!=3 ) {
printf("Parse error\n");
return -1;
}
ptr = strstr(http_hdr->body, album_title);
if( ptr!=NULL ) {
char *ptr2;
int len;
ptr2 = strstr(ptr, "\n");
if( ptr2==NULL ) {
len = (http_hdr->body_size)-(ptr-(http_hdr->body));
} else {
len = ptr2-ptr+1;
}
strncpy(album_title, ptr, len);
album_title[len-2]='\0';
}
printf("Parse OK, found: %s\n", album_title);
return cddb_request_titles(cddb_data);
/*
body=[210 Found exact matches, list follows (until terminating `.')
misc c711930d Santana / Supernatural
rock c711930d Santana / Supernatural
blues c711930d Santana / Supernatural
.]
*/
case 211:
// Found inexact matches, list follows
printf("No exact matches found, list follows\n");
break;
default:
printf("Unhandled code\n");
}
return -1;
}
int
cddb_proto_level_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
int max;
int ret, status;
char *ptr;
ret = sscanf( http_hdr->body, "%d ", &status);
if( ret!=1 ) {
printf("Parse error\n");
return -1;
}
switch(status) {
case 210:
ptr = strstr(http_hdr->body, "max proto:");
if( ptr==NULL ) {
printf("Parse error\n");
return -1;
}
ret = sscanf(ptr, "max proto: %d", &max);
if( ret!=1 ) {
printf("Parse error\n");
return -1;
}
cddb_data->freedb_proto_level = max;
return 0;
default:
printf("Unhandled code\n");
}
return -1;
}
int
cddb_get_proto_level(cddb_data_t *cddb_data) {
return cddb_http_request("stat", cddb_proto_level_parse, cddb_data);
}
int
cddb_freedb_sites_parse(HTTP_header_t *http_hdr, cddb_data_t *cddb_data) {
int ret, status;
ret = sscanf( http_hdr->body, "%d ", &status);
if( ret!=1 ) {
printf("Parse error\n");
return -1;
}
switch(status) {
case 210:
// TODO: Parse the sites
ret = cddb_data->anonymous; // For gcc complaining about unused parameter.
return 0;
case 401:
printf("No sites information available\n");
break;
default:
printf("Unhandled code\n");
}
return -1;
}
int
cddb_get_freedb_sites(cddb_data_t *cddb_data) {
return cddb_http_request("sites", cddb_freedb_sites_parse, cddb_data);
}
void
cddb_create_hello(cddb_data_t *cddb_data) {
char host_name[51];
char *user_name;
if( cddb_data->anonymous ) { // Default is anonymous
/* Note from Eduardo P<>rez Ureta <eperez@it.uc3m.es> :
* We don't send current user/host name in hello to prevent spam.
* Software that sends this is considered spyware
* that most people don't like.
*/
user_name = "anonymous";
strcpy(host_name, "localhost");
} else {
if( gethostname(host_name, 50)<0 ) {
strcpy(host_name, "localhost");
}
user_name = getenv("LOGNAME");
}
sprintf( cddb_data->cddb_hello, "&hello=%s+%s+%s+%s", user_name, host_name, "MPlayer", VERSION );
}
int
cddb_retrieve(cddb_data_t *cddb_data) {
char offsets[1024], command[1024];
char *ptr;
unsigned int i, time_len;
int ret;
ptr = offsets;
for( i=0; i<cddb_data->tracks ; i++ ) {
ptr += sprintf(ptr, "%d+", cdtoc[i].frame );
}
time_len = (cdtoc[cddb_data->tracks].frame)/75;
cddb_data->freedb_server = DEFAULT_FREEDB_SERVER;
cddb_data->freedb_proto_level = 1;
cddb_data->xmcd_file = NULL;
cddb_create_hello(cddb_data);
if( cddb_get_proto_level(cddb_data)<0 ) {
printf("Failed to get the protocol level\n");
return -1;
}
//cddb_get_freedb_sites(&cddb_data);
sprintf(command, "cddb+query+%08lx+%d+%s%d", cddb_data->disc_id, cddb_data->tracks, offsets, time_len );
ret = cddb_http_request(command, cddb_query_parse, cddb_data);
if( ret<0 ) return -1;
if( cddb_data->cache_dir!=NULL ) {
free(cddb_data->cache_dir);
}
return 0;
}
int
cddb_resolve(char **xmcd_file) {
char cddb_cache_dir[] = DEFAULT_CACHE_DIR;
char *home_dir = NULL;
cddb_data_t cddb_data;
cddb_data.tracks = read_toc();
cddb_data.disc_id = cddb_discid(cddb_data.tracks);
cddb_data.anonymous = 1; // Don't send user info by default
// Check if there is a CD in the drive
// FIXME: That's not really a good way to check
if( cddb_data.disc_id==8256 ) {
printf("No CD in the drive\n");
return -1;
}
home_dir = getenv("HOME");
if( home_dir==NULL ) {
cddb_data.cache_dir = NULL;
} else {
cddb_data.cache_dir = (char*)malloc(strlen(home_dir)+strlen(cddb_cache_dir)+1);
if( cddb_data.cache_dir==NULL ) {
printf("Memory allocation failed\n");
return -1;
}
sprintf(cddb_data.cache_dir, "%s%s", home_dir, cddb_cache_dir );
}
// Check for a cached file
if( cddb_read_cache(&cddb_data)<0 ) {
// No Cache found
if( cddb_retrieve(&cddb_data)<0 ) {
return -1;
}
}
if( cddb_data.xmcd_file!=NULL ) {
// printf("%s\n", cddb_data.xmcd_file );
*xmcd_file = cddb_data.xmcd_file;
return 0;
}
return -1;
}
/*******************************************************************************************************************
*
* xmcd parser
*
*******************************************************************************************************************/
char*
xmcd_parse_dtitle(cd_info_t *cd_info, char *line) {
char *ptr, *album;
ptr = strstr(line, "DTITLE=");
if( ptr!=NULL ) {
ptr += 7;
album = strstr(ptr, "/");
if( album==NULL ) return NULL;
cd_info->album = (char*)malloc(strlen(album+2)+1);
if( cd_info->album==NULL ) {
return NULL;
}
strcpy( cd_info->album, album+2 );
album--;
album[0] = '\0';
cd_info->artist = (char*)malloc(strlen(ptr)+1);
if( cd_info->artist==NULL ) {
return NULL;
}
strcpy( cd_info->artist, ptr );
}
return ptr;
}
char*
xmcd_parse_dgenre(cd_info_t *cd_info, char *line) {
char *ptr;
ptr = strstr(line, "DGENRE=");
if( ptr!=NULL ) {
ptr += 7;
cd_info->genre = (char*)malloc(strlen(ptr)+1);
if( cd_info->genre==NULL ) {
return NULL;
}
strcpy( cd_info->genre, ptr );
}
return ptr;
}
char*
xmcd_parse_ttitle(cd_info_t *cd_info, char *line) {
unsigned int track_nb;
unsigned long sec, off;
char *ptr;
ptr = strstr(line, "TTITLE");
if( ptr!=NULL ) {
ptr += 6;
// Here we point to the track number
track_nb = atoi(ptr);
ptr = strstr(ptr, "=");
if( ptr==NULL ) return NULL;
ptr++;
sec = cdtoc[track_nb].frame;
off = cdtoc[track_nb+1].frame-sec+1;
cd_info_add_track( cd_info, ptr, track_nb+1, (unsigned int)(off/(60*75)), (unsigned int)((off/75)%60), (unsigned int)(off%75), sec, off );
}
return ptr;
}
cd_info_t*
cddb_parse_xmcd(char *xmcd_file) {
cd_info_t *cd_info = NULL;
int length, pos = 0;
char *ptr, *ptr2;
unsigned int audiolen;
if( xmcd_file==NULL ) return NULL;
cd_info = cd_info_new();
if( cd_info==NULL ) {
return NULL;
}
length = strlen(xmcd_file);
ptr = xmcd_file;
while( ptr!=NULL && pos<length ) {
// Read a line
ptr2 = ptr;
while( ptr2[0]!='\0' && ptr2[0]!='\r' && ptr2[0]!='\n' ) ptr2++;
if( ptr2[0]=='\0' ) {
break;
}
ptr2[0] = '\0';
// Ignore comments
if( ptr[0]!='#' ) {
// Search for the album title
if( xmcd_parse_dtitle(cd_info, ptr) );
// Search for the genre
else if( xmcd_parse_dgenre(cd_info, ptr) );
// Search for a track title
else if( xmcd_parse_ttitle(cd_info, ptr) );
}
if( ptr2[1]=='\n' ) ptr2++;
pos = (ptr2+1)-ptr;
ptr = ptr2+1;
}
audiolen = cdtoc[cd_info->nb_tracks].frame-cdtoc[0].frame;
cd_info->min = (unsigned int)(audiolen/(60*75));
cd_info->sec = (unsigned int)((audiolen/75)%60);
cd_info->msec = (unsigned int)(audiolen%75);
return cd_info;
}
stream_t*
cddb_open(char *dev, char *track) {
stream_t *stream;
cd_info_t *cd_info = NULL;
cdda_priv *priv;
char *xmcd_file = NULL;
int ret;
ret = cddb_resolve(&xmcd_file);
if( ret<0 ) {
return NULL;
}
if( ret==0 ) {
cd_info = cddb_parse_xmcd(xmcd_file);
free(xmcd_file);
}
stream = open_cdda(dev, track);
priv = ((cdda_priv*)(stream->priv));
if( cd_info!=NULL ) {
cd_info_free(priv->cd_info);
priv->cd_info = cd_info;
}
cd_info_debug( cd_info );
return stream;
}
#endif
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