mpv/stream/stream_cddb.c

/*
 * CDDB HTTP protocol
 *
 * Copyright (C) 2002 Bertrand Baudet <bertrand_baudet@yahoo.com>
 *
 * 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>
 *
 * This file is part of MPlayer.
 *
 * MPlayer 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 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include "osdep/io.h"
#if defined(__MINGW32__) || defined(__CYGWIN__)
#include <windows.h>
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#else
#include <netdb.h>
#include <sys/ioctl.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>

#include "core/mp_msg.h"
#include "core/path.h"

#if defined(__linux__)
#include <linux/cdrom.h>
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
#include <sys/cdio.h>
#elif defined(__MINGW32__) || defined(__CYGWIN__)
#include <ntddcdrm.h>
#elif defined(__bsdi__)
#include <dvd.h>
#elif defined(__APPLE__) || defined(__DARWIN__)
#include <IOKit/storage/IOCDTypes.h>
#include <IOKit/storage/IOCDMediaBSDClient.h>
#include "compat/mpbswap.h"
#endif

#include "cdd.h"
#include "core/mp_common.h"
#include "stream.h"
#include "network.h"
#include "libavutil/common.h"

#define DEFAULT_FREEDB_SERVER "freedb.freedb.org"
#define DEFAULT_CACHE_DIR     "/.cddb/"

typedef struct {
	char cddb_hello[1024];
	unsigned long disc_id;
	unsigned int tracks;
	char *cache_dir;
	char *freedb_server;
	int freedb_proto_level;
	int anonymous;
	char category[100];
	char *xmcd_file;
	size_t xmcd_file_size;
	void *user_data;
} cddb_data_t;

typedef struct {
	unsigned int min, sec, frame;
} cd_toc_t;

static cd_toc_t cdtoc[100];
static int cdtoc_last_track;

static int read_toc(const char *dev)
{
    int first = 0, last = -1;
    int i;
#if defined(__MINGW32__) || defined(__CYGWIN__)
    HANDLE drive;
    DWORD r;
    CDROM_TOC toc;
    char device[10];

    snprintf(device, sizeof(device), "\\\\.\\%s", dev);
    drive = CreateFile(device, GENERIC_READ, FILE_SHARE_READ, NULL,
                       OPEN_EXISTING, 0, 0);

    if (!DeviceIoControl(drive, IOCTL_CDROM_READ_TOC, NULL, 0, &toc,
                         sizeof(CDROM_TOC), &r, 0)) {
        mp_tmsg(MSGT_OPEN, MSGL_ERR, "Failed to read TOC.\n");
        return 0;
    }

    first = toc.FirstTrack - 1; last = toc.LastTrack;
    for (i = first; i <= last; i++) {
        cdtoc[i].min   = toc.TrackData[i].Address[1];
        cdtoc[i].sec   = toc.TrackData[i].Address[2];
        cdtoc[i].frame = toc.TrackData[i].Address[3];
    }
    CloseHandle(drive);

#else
    int drive;
    drive = open(dev, O_RDONLY | O_NONBLOCK);
    if (drive < 0) {
        return drive;
    }

#if defined(__linux__) || defined(__bsdi__)
    {
        struct cdrom_tochdr tochdr;
        ioctl(drive, CDROMREADTOCHDR, &tochdr);
        first = tochdr.cdth_trk0 - 1; last = tochdr.cdth_trk1;
    }
    for (i = first; i <= last; i++) {
        struct cdrom_tocentry tocentry;
        tocentry.cdte_track  = (i == last) ? 0xAA : i + 1;
        tocentry.cdte_format = CDROM_MSF;
        ioctl(drive, CDROMREADTOCENTRY, &tocentry);
        cdtoc[i].min   = tocentry.cdte_addr.msf.minute;
        cdtoc[i].sec   = tocentry.cdte_addr.msf.second;
        cdtoc[i].frame = tocentry.cdte_addr.msf.frame;
    }
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
    {
        struct ioc_toc_header tochdr;
        ioctl(drive, CDIOREADTOCHEADER, &tochdr);
        first = tochdr.starting_track - 1; last = tochdr.ending_track;
    }
    for (i = first; i <= last; i++) {
        struct ioc_read_toc_single_entry tocentry;
        tocentry.track          = (i == last) ? 0xAA : i + 1;
        tocentry.address_format = CD_MSF_FORMAT;
        ioctl(drive, CDIOREADTOCENTRY, &tocentry);
        cdtoc[i].min   = tocentry.entry.addr.msf.minute;
        cdtoc[i].sec   = tocentry.entry.addr.msf.second;
        cdtoc[i].frame = tocentry.entry.addr.msf.frame;
    }
#elif defined(__NetBSD__) || defined(__OpenBSD__)
    {
        struct ioc_toc_header tochdr;
        ioctl(drive, CDIOREADTOCHEADER, &tochdr);
        first = tochdr.starting_track - 1; last = tochdr.ending_track;
    }
    for (i = first; i <= last; i++) {
        struct ioc_read_toc_entry tocentry;
        struct cd_toc_entry toc_buffer;
        tocentry.starting_track = (i == last) ? 0xAA : i + 1;
        tocentry.address_format = CD_MSF_FORMAT;
        tocentry.data           = &toc_buffer;
        tocentry.data_len       = sizeof(toc_buffer);
        ioctl(drive, CDIOREADTOCENTRYS, &tocentry);
        cdtoc[i].min   = toc_buffer.addr.msf.minute;
        cdtoc[i].sec   = toc_buffer.addr.msf.second;
        cdtoc[i].frame = toc_buffer.addr.msf.frame;
    }
#elif defined(__APPLE__) || defined(__DARWIN__)
    {
        dk_cd_read_toc_t tochdr;
        uint8_t buf[4];
        uint8_t buf2[100 * sizeof(CDTOCDescriptor) + sizeof(CDTOC)];
        memset(&tochdr, 0, sizeof(tochdr));
        tochdr.bufferLength = sizeof(buf);
        tochdr.buffer       = &buf;
        if (!ioctl(drive, DKIOCCDREADTOC, &tochdr)
            && tochdr.bufferLength == sizeof(buf)) {
            first = buf[2] - 1;
            last  = buf[3];
        }
        if (last >= 0) {
            memset(&tochdr, 0, sizeof(tochdr));
            tochdr.bufferLength = sizeof(buf2);
            tochdr.buffer       = &buf2;
            tochdr.format       = kCDTOCFormatTOC;
            if (ioctl(drive, DKIOCCDREADTOC, &tochdr)
                || tochdr.bufferLength < sizeof(CDTOC))
                last = -1;
        }
        if (last >= 0) {
            CDTOC *cdToc = (CDTOC *)buf2;
            CDTrackInfo lastTrack;
            dk_cd_read_track_info_t trackInfoParams;
            for (i = first; i < last; ++i) {
                CDMSF msf = CDConvertTrackNumberToMSF(i + 1, cdToc);
                cdtoc[i].min   = msf.minute;
                cdtoc[i].sec   = msf.second;
                cdtoc[i].frame = msf.frame;
            }
            memset(&trackInfoParams, 0, sizeof(trackInfoParams));
            trackInfoParams.addressType  = kCDTrackInfoAddressTypeTrackNumber;
            trackInfoParams.bufferLength = sizeof(lastTrack);
            trackInfoParams.address      = last;
            trackInfoParams.buffer       = &lastTrack;
            if (!ioctl(drive, DKIOCCDREADTRACKINFO, &trackInfoParams)) {
                CDMSF msf = CDConvertLBAToMSF(be2me_32(lastTrack.trackStartAddress)
                            + be2me_32(lastTrack.trackSize));
                cdtoc[last].min   = msf.minute;
                cdtoc[last].sec   = msf.second;
                cdtoc[last].frame = msf.frame;
            }
        }
    }
#endif
    close(drive);
#endif
    for (i = first; i <= last; i++)
        cdtoc[i].frame += (cdtoc[i].min * 60 + cdtoc[i].sec) * 75;
    return last;
}

/**
\brief Reads TOC from CD in the given device and prints the number of tracks
       and the length of each track in minute:second:frame format.
\param *dev the device to analyse
\return if the command line -identify is given, returns the last track of
        the TOC or -1 if the TOC can't be read,
        otherwise just returns 0 and let cddb_resolve the TOC
*/
int cdd_identify(const char *dev)
{
    cdtoc_last_track = 0;
    if (mp_msg_test(MSGT_IDENTIFY, MSGL_INFO)) {
        int i, min, sec, frame;
        cdtoc_last_track = read_toc(dev);
        if (cdtoc_last_track < 0) {
            mp_tmsg(MSGT_OPEN, MSGL_ERR, "Failed to open %s device.\n", dev);
            return -1;
        }
        mp_msg(MSGT_GLOBAL, MSGL_INFO, "ID_CDDA_TRACKS=%d\n", cdtoc_last_track);
        for (i = 1; i <= cdtoc_last_track; i++) {
            frame  = cdtoc[i].frame - cdtoc[i-1].frame;
            sec    = frame / 75;
            frame -= sec * 75;
            min    = sec / 60;
            sec   -= min * 60;
            mp_msg(MSGT_IDENTIFY, MSGL_INFO,
                   "ID_CDDA_TRACK_%d_MSF=%02d:%02d:%02d\n", i, min, sec, frame);
        }
    }
    return cdtoc_last_track;
}

static unsigned int cddb_sum(int n)
{
    unsigned int ret;

    ret = 0;
    while (n > 0) {
        ret += (n % 10);
        n   /= 10;
    }
    return ret;
}

static 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;
}



static 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;

    snprintf(request, sizeof(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);
    mp_msg(MSGT_OPEN, MSGL_INFO,"Request[%s]\n", request);

    url = url_new(request);
    if (url == NULL) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "not a valid URL\n");
        return -1;
    }

    fd = http_send_request(url,0);
    if (fd < 0) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Failed to send the HTTP request.\n");
        return -1;
    }

    http_hdr = http_read_response(fd);
    if (http_hdr == NULL) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Failed to read the HTTP response.\n");
        return -1;
    }

    http_debug_hdr(http_hdr);
    mp_msg(MSGT_OPEN, MSGL_INFO,"body=[%s]\n", http_hdr->body);

    switch (http_hdr->status_code) {
    case 200:
        ret = reply_parser(http_hdr, cddb_data);
        break;
    case 400:
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Not Found.\n");
        break;
    default:
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "unknown error code\n");
    }

    http_free(http_hdr);
    url_free(url);

    return ret;
}

static 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;

    snprintf(file_name, sizeof(file_name), "%s%08lx", cddb_data->cache_dir, cddb_data->disc_id);

    file_fd = open(file_name, O_RDONLY | O_BINARY);
    if (file_fd < 0) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "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 < UINT_MAX ? stats.st_size : UINT_MAX - 1;
    }

    cddb_data->xmcd_file = malloc(file_size + 1);
    if (cddb_data->xmcd_file == NULL) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "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) {
        mp_tmsg(MSGT_DEMUX, MSGL_WARN, "Not all the xmcd file has been read.\n");
        close(file_fd);
        return -1;
    }
    cddb_data->xmcd_file[cddb_data->xmcd_file_size] = 0;

    close(file_fd);

    return 0;
}

static int cddb_write_cache(cddb_data_t *cddb_data)
{
    // We have the file, save it for cache.
    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
    if (!mp_path_exists(cddb_data->cache_dir)) {
        // Directory not present, create it.
        ret = mkdir(cddb_data->cache_dir, 0755);
#ifdef __MINGW32__
        if (ret < 0 && errno != EEXIST) {
#else
        if (ret < 0) {
#endif
            perror("mkdir");
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Failed to create directory %s.\n",
                    cddb_data->cache_dir);
            return -1;
        }
    }

    snprintf(file_name, sizeof(file_name), "%s%08lx", cddb_data->cache_dir, cddb_data->disc_id);

    file_fd = creat(file_name, S_IRUSR | S_IWUSR);
    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) {
        mp_tmsg(MSGT_DEMUX, MSGL_WARN, "Not all of the xmcd file has been written.\n");
        close(file_fd);
        return -1;
    }

    close(file_fd);

    return 0;
}

static 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) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
        return -1;
    }

    switch (status) {
    case 210:
        ret = sscanf(http_hdr->body, "%d %99s %08lx", &status,
                     category, &disc_id);
        if (ret != 3) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
            return -1;
        }
        // Check if it's a xmcd database file
        ptr = strstr(http_hdr->body, "# xmcd");
        if (ptr == NULL) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR,
                    "Invalid xmcd database file returned.\n");
            return -1;
        }
        ptr = strdup(ptr);
        // Ok found the beginning of the file
        // look for the end
        ptr2 = strstr(ptr, "\n.\r\n");
        if (!ptr2)
            ptr2 = strstr(ptr, "\n.\n");
        if (ptr2) {
            ptr2++;
        } else {
            mp_msg(MSGT_DEMUX, MSGL_FIXME, "Unable to find '.'\n");
            ptr2 = ptr + strlen(ptr); //return -1;
        }
        // Ok found the end
        // do a sanity check
        if (http_hdr->body_size < (unsigned int)(ptr2 - ptr)) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "unexpected FIXME\n");
            return -1;
        }
        cddb_data->xmcd_file                            = ptr;
        cddb_data->xmcd_file_size                       = ptr2 - ptr;
        cddb_data->xmcd_file[cddb_data->xmcd_file_size] = '\0';
        return cddb_write_cache(cddb_data);
    default:
        mp_tmsg(MSGT_DEMUX, MSGL_FIXME, "unhandled code\n");
    }
    return 0;
}

static int cddb_request_titles(cddb_data_t *cddb_data)
{
    char command[1024];
    snprintf(command, sizeof(command), "cddb+read+%s+%08lx",
            cddb_data->category, cddb_data->disc_id);
    return cddb_http_request(command, cddb_read_parse, cddb_data);
}

static int cddb_parse_matches_list(HTTP_header_t *http_hdr, cddb_data_t *cddb_data)
{
    char album_title[100];
    char *ptr = NULL;
    int ret;

    ptr = strstr(http_hdr->body, "\n");
    if (ptr == NULL) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Unable to find end of line.\n");
        return -1;
    }
    ptr++;
    // We have a list of exact/inexact matches, so which one do we use?
    // So let's take the first one.
    ret = sscanf(ptr, "%99s %08lx %99s", cddb_data->category,
                 &(cddb_data->disc_id), album_title);
    if (ret != 3) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
        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;
        }
        len = FFMIN(sizeof(album_title) - 1, len);
        strncpy(album_title, ptr, len);
        album_title[len]='\0';
    }
    mp_tmsg(MSGT_DEMUX, MSGL_STATUS, "Parse OK, found: %s\n", album_title);
    return 0;
}

static 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) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
        return -1;
    }

    switch (status) {
    case 200:
        // Found exact match
        ret = sscanf(http_hdr->body, "%d %99s %08lx %99s", &status,
                     cddb_data->category, &(cddb_data->disc_id), album_title);
        if (ret != 4) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
            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;
            }
            len = FFMIN(sizeof(album_title) - 1, len);
            strncpy(album_title, ptr, len);
            album_title[len]='\0';
        }
        mp_tmsg(MSGT_DEMUX, MSGL_STATUS, "Parse OK, found: %s\n", album_title);
        return cddb_request_titles(cddb_data);
    case 202:
        // No match found
        mp_tmsg(MSGT_DEMUX, MSGL_WARN, "Album not found.\n");
        break;
    case 210:
        // Found exact matches, list follows
        cddb_parse_matches_list(http_hdr, cddb_data);
        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
        cddb_parse_matches_list(http_hdr, cddb_data);
        return cddb_request_titles(cddb_data);
    case 500:
        mp_tmsg(MSGT_DEMUX, MSGL_FIXME,
                "Server returns: Command syntax error\n");
        break;
    default:
        mp_tmsg(MSGT_DEMUX, MSGL_FIXME, "unhandled code\n");
    }
    return -1;
}

static 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) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
        return -1;
    }

    switch (status) {
    case 210:
        ptr = strstr(http_hdr->body, "max proto:");
        if (ptr == NULL) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
            return -1;
        }
        ret = sscanf(ptr, "max proto: %d", &max);
        if (ret != 1) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "parse error");
            return -1;
        }
        cddb_data->freedb_proto_level = max;
        return 0;
    default:
        mp_tmsg(MSGT_DEMUX, MSGL_FIXME, "unhandled code\n");
    }
    return -1;
}

static int cddb_get_proto_level(cddb_data_t *cddb_data)
{
    return cddb_http_request("stat", cddb_proto_level_parse, cddb_data);
}

static 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 Pérez 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");
    }
    snprintf(cddb_data->cddb_hello, sizeof(cddb_data->cddb_hello),
            "&hello=%s+%s+%s",
            user_name, host_name, mplayer_version);
}

static 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++) {
        unsigned space = sizeof(offsets) - (ptr - offsets);
        if (space < 40) break;
        ptr += snprintf(ptr, space, "%d+", cdtoc[i].frame);
    }
    ptr[0] = 0;
    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) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Failed to get the protocol level.\n");
        return -1;
    }

    snprintf(command, sizeof(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;

    free(cddb_data->cache_dir);
    return 0;
}

int cddb_resolve(const char *dev, char **xmcd_file)
{
    char cddb_cache_dir[] = DEFAULT_CACHE_DIR;
    char *home_dir = NULL;
    cddb_data_t cddb_data;
    void *talloc_ctx = talloc_new(NULL);

    if (cdtoc_last_track <= 0) {
        cdtoc_last_track = read_toc(dev);
        if (cdtoc_last_track < 0) {
            mp_tmsg(MSGT_OPEN, MSGL_ERR, "Failed to open %s device.\n", dev);
            return -1;
        }
    }
    cddb_data.tracks    = cdtoc_last_track;
    cddb_data.disc_id   = cddb_discid(cddb_data.tracks);
    cddb_data.anonymous = 1;    // Don't send user info by default

    mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CDDB_DISCID=%08lx\n",
           cddb_data.disc_id);

    // Check if there is a CD in the drive
    // FIXME: That's not really a good way to check
    if (cddb_data.disc_id == 0) {
        mp_tmsg(MSGT_DEMUX, MSGL_ERR, "No CD in the drive.\n");
        return -1;
    }

    home_dir = getenv("HOME");
#ifdef __MINGW32__
    if (home_dir == NULL)
        home_dir = getenv("USERPROFILE");
    if (home_dir == NULL)
        home_dir = getenv("HOMEPATH");
    // Last resort, store the cddb cache in the mplayer directory
    if (home_dir == NULL)
        home_dir = (char *)talloc_steal(talloc_ctx,
                                        mp_find_user_config_file(""));
#endif
    if (home_dir == NULL) {
        cddb_data.cache_dir = NULL;
    } else {
        unsigned len = strlen(home_dir) + strlen(cddb_cache_dir) + 1;
        cddb_data.cache_dir = malloc(len);
        if (cddb_data.cache_dir == NULL) {
            mp_tmsg(MSGT_DEMUX, MSGL_ERR, "Memory allocation failed.\n");
            talloc_free(talloc_ctx);
            return -1;
        }
        snprintf(cddb_data.cache_dir, len, "%s%s", home_dir, cddb_cache_dir);
    }
    talloc_free(talloc_ctx);

    // 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 *
 ***************/
static 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 = 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 = malloc(strlen(ptr) + 1);
        if (cd_info->artist == NULL) {
            return NULL;
        }
        strcpy(cd_info->artist, ptr);
    }
    return ptr;
}

static 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 = malloc(strlen(ptr)+1);
        if (cd_info->genre == NULL) {
            return NULL;
        }
        strcpy(cd_info->genre, ptr);
    }
    return ptr;
}

static 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;
    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;
    }

    unsigned int 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;
}