access.c

VLC媒体播放程序

                      "%s", p_cdda->cddb.disc->artist);
    playlist_ItemAddInfo( p_item, psz_general_cat,
                        _("CDDB Disc Category"),
                      "%s", CDDB_CATEGORY[p_cdda->cddb.disc->category]);
    playlist_ItemAddInfo( p_item, psz_general_cat, _("Genre"),
                      "%s", p_cdda->cddb.disc->genre);
    if ( p_cdda->cddb.disc->discid ) {
      playlist_ItemAddInfo( p_item, psz_general_cat, _("CDDB Disc ID"),
                        "%x", p_cdda->cddb.disc->discid );
    }
    if (p_cdda->cddb.disc->year != 0) {
      playlist_ItemAddInfo( p_item, psz_general_cat,
                        _("Year"), "%5d", p_cdda->cddb.disc->year );
    }

    if (p_cdda->i_cddb_enabled) {
      cddb_track_t *t=cddb_disc_get_track(p_cdda->cddb.disc,
                                          i_track-1);
      if (t != NULL && t->artist != NULL) {
        playlist_ItemAddInfo( p_item, psz_general_cat,
                          _("Track Artist"), "%s", t->artist );
        playlist_ItemAddInfo( p_item , psz_general_cat,
                          _("Track Title"), "%s",  t->title );
      }
    }

  }
#endif /*HAVE_LIBCDDB*/

  vlc_mutex_unlock( &p_item->lock );
}

static int
CDDAFixupPlayList( input_thread_t *p_input, cdda_data_t *p_cdda,
                   const char *psz_source, bool play_single_track)
{
  int i;
  playlist_t * p_playlist;
  char       * psz_mrl;
  unsigned int psz_mrl_max = strlen(CDDA_MRL_PREFIX) + strlen(psz_source) +
    strlen("@T") + strlen("100") + 1;

#ifdef HAVE_LIBCDDB
  p_cdda->i_cddb_enabled =
    config_GetInt( p_input, MODULE_STRING "-cddb-enabled" );
  if( play_single_track && !p_cdda->i_cddb_enabled ) return 0;
#else
  if( play_single_track ) return 0;
#endif


  psz_mrl = malloc( psz_mrl_max );

  if( psz_mrl == NULL )
    {
      msg_Warn( p_input, "out of memory" );
      return -1;
    }

  p_playlist = (playlist_t *) vlc_object_find( p_input, VLC_OBJECT_PLAYLIST,
                                               FIND_ANYWHERE );
  if( !p_playlist )
    {
      msg_Warn( p_input, "can't find playlist" );
      free(psz_mrl);
      return -1;
    }

#ifdef HAVE_LIBCDDB
  if (p_cdda->i_cddb_enabled)
    GetCDDBInfo(p_input, p_cdda);
  else
    p_cdda->cddb.disc = NULL;
#endif

  InformationCreate(p_input);

  if (play_single_track) {
    /* May fill out more information when the playlist user interface becomes
       more mature.
     */
    CDDACreatePlayListItem(p_input, p_cdda, p_playlist, p_cdda->i_track+1,
                           psz_mrl, psz_mrl_max, psz_source, PLAYLIST_REPLACE,
                           p_playlist->i_index);
  } else {

    playlist_Delete( p_playlist, p_playlist->i_index);

    for( i = 1 ; i <= p_cdda->i_nb_tracks ; i++ )
      {
        CDDACreatePlayListItem(p_input, p_cdda, p_playlist, i, psz_mrl,
                               psz_mrl_max, psz_source, PLAYLIST_APPEND,
                               PLAYLIST_END);
      }

    playlist_Command( p_playlist, PLAYLIST_GOTO, 0 );

  }

  vlc_object_release( p_playlist );
  free(psz_mrl);
  return 0;
}

/****************************************************************************
 * Public functions
 ****************************************************************************/
int
E_(DebugCB)   ( vlc_object_t *p_this, const char *psz_name,
                vlc_value_t oldval, vlc_value_t val, void *p_data )
{
  cdda_data_t *p_cdda;

  if (NULL == p_cdda_input) return VLC_EGENERIC;

  p_cdda = (cdda_data_t *)p_cdda_input->p_access_data;

  if (p_cdda->i_debug & (INPUT_DBG_CALL|INPUT_DBG_EXT)) {
    msg_Dbg( p_cdda_input, "Old debug (x%0x) %d, new debug (x%0x) %d",
             p_cdda->i_debug, p_cdda->i_debug, val.i_int, val.i_int);
  }
  p_cdda->i_debug = val.i_int;
  return VLC_SUCCESS;
}

int
E_(CDDBEnabledCB)   ( vlc_object_t *p_this, const char *psz_name,
                      vlc_value_t oldval, vlc_value_t val, void *p_data )
{
  cdda_data_t *p_cdda;

  if (NULL == p_cdda_input) return VLC_EGENERIC;

  p_cdda = (cdda_data_t *)p_cdda_input->p_access_data;

#ifdef HAVE_LIBCDDB
  if (p_cdda->i_debug & (INPUT_DBG_CALL|INPUT_DBG_EXT)) {
    msg_Dbg( p_cdda_input, "Old CDDB Enabled (x%0x) %d, new (x%0x) %d",
             p_cdda->i_cddb_enabled, p_cdda->i_cddb_enabled,
             val.i_int, val.i_int);
  }
  p_cdda->i_cddb_enabled = val.i_int;
#endif
  return VLC_SUCCESS;
}

/*FIXME*/
#if PLAYLIST_INTERFACE_IS_FIXED
int
E_(TitleFormatCB)   ( vlc_object_t *p_this, const char *psz_name,
                      vlc_value_t oldval, vlc_value_t val, void *p_data )
{
  cdda_data_t *p_cdda;

  if (NULL == p_cdda_input) return VLC_EGENERIC;

  p_cdda = (cdda_data_t *)p_cdda_input->p_access_data;

  if (p_cdda->i_debug & (INPUT_DBG_CALL|INPUT_DBG_EXT)) {
    msg_Dbg( p_cdda_input, "Old CDDB Enabled (%s), new (%s)",
             oldval.psz_string, val.psz_string);
  }
  ????
  return VLC_SUCCESS;
}
#endif

/*****************************************************************************
 * Open: open cdda
 *****************************************************************************/
int
E_(Open)( vlc_object_t *p_this )
{
    input_thread_t *        p_input = (input_thread_t *)p_this;
    char *                  psz_orig;
    char *                  psz_parser;
    char *                  psz_source;
    cdda_data_t *           p_cdda;
    int                     i;
    int                     i_track = 1;
    cddev_t                 *p_cddev;
    vlc_value_t             val;
    bool                    play_single_track = false;

    /* Set where to log errors messages from libcdio. */
    p_cdda_input = (input_thread_t *)p_this;

    /* parse the options passed in command line : */
    psz_orig = psz_parser = psz_source = strdup( p_input->psz_name );

    if( !psz_orig )
    {
        return( -1 );
    }

    while( *psz_parser && *psz_parser != '@' )
    {
        psz_parser++;
    }

    if( *psz_parser == '@' )
    {
        /* Found options */
        *psz_parser = '\0';
        ++psz_parser;

        if ('T' == *psz_parser || 't' == *psz_parser )
            ++psz_parser;

        i_track = (int)strtol( psz_parser, NULL, 10 );
        i_track = i_track ? i_track : 1;
        play_single_track = true;
    }

    if( !*psz_source ) {
      /* No source specified, so figure it out. */
      if( !p_input->psz_access ) {
        free( psz_orig );
        return -1;
      }
      psz_source = config_GetPsz( p_input, "cd-audio" );

      if( !psz_source || 0==strlen(psz_source) ) {
        /* Scan for a CD-ROM drive with a CD-DA in it. */
        char **cd_drives =
          cdio_get_devices_with_cap(NULL,  CDIO_FS_AUDIO, false);
        if (NULL == cd_drives) return -1;
        if (cd_drives[0] == NULL) {
          cdio_free_device_list(cd_drives);
          return -1;
        }
        psz_source = strdup(cd_drives[0]);
        cdio_free_device_list(cd_drives);
      }
    }

    /* Open CDDA */
    cdio_log_set_handler ( cdio_log_handler );
#ifdef HAVE_LIBCDDB
    cddb_log_set_handler ( cddb_log_handler );
#endif

    if( !(p_cddev = ioctl_Open( p_this, psz_source )) )
    {
        msg_Warn( p_input, "could not open %s", psz_source );
        free( psz_source );
        return VLC_EGENERIC;
    }

    p_cdda = malloc( sizeof(cdda_data_t) );
    if( p_cdda == NULL )
    {
        msg_Err( p_input, "out of memory" );
        free( psz_source );
        return VLC_ENOMEM;
    }

    p_cdda->p_cddev        = p_cddev;
    p_cdda->i_debug        = config_GetInt( p_this, MODULE_STRING "-debug" );
    p_input->p_access_data = (void *)p_cdda;

    dbg_print( (INPUT_DBG_CALL|INPUT_DBG_EXT), "%s", psz_source );

    p_input->i_mtu = CDDA_DATA_ONCE;

    /* We read the Table Of Content information */
    p_cdda->i_nb_tracks = ioctl_GetTracksMap( VLC_OBJECT(p_input),
                              p_cdda->p_cddev->cdio, &p_cdda->p_sectors );
    if( p_cdda->i_nb_tracks < 0 )
        msg_Err( p_input, "unable to count tracks" );
    else if( p_cdda->i_nb_tracks <= 0 )
        msg_Err( p_input, "no audio tracks found" );

    if( p_cdda->i_nb_tracks <= 0 )
    {
        ioctl_Close( p_cdda->p_cddev );
        free( p_cdda );
        free( psz_source );
        return VLC_EGENERIC;
    }

    if( i_track > p_cdda->i_nb_tracks || i_track < 1 )
        i_track = 1;

    /* Set stream and area data */
    vlc_mutex_lock( &p_input->stream.stream_lock );

    /* Initialize ES structures */
    input_InitStream( p_input, 0 );

    /* cdda input method */
    p_input->stream.i_method = INPUT_METHOD_CDDA;

    p_input->stream.b_pace_control = 1;
    p_input->stream.b_seekable = 1;
    p_input->stream.i_mux_rate = 44100 * 4 / 50;

#define area p_input->stream.pp_areas
    for( i = 1 ; i <= p_cdda->i_nb_tracks ; i++ )
    {
        input_AddArea( p_input, i, 1 );

        /* Absolute start offset and size */
        area[i]->i_start =
            (off_t)p_cdda->p_sectors[i-1] * (off_t)CDIO_CD_FRAMESIZE_RAW;
        area[i]->i_size =
            (off_t)(p_cdda->p_sectors[i] - p_cdda->p_sectors[i-1])
            * (off_t)CDIO_CD_FRAMESIZE_RAW;
    }
#undef area

    CDDAPlay( p_input, i_track);
    vlc_mutex_unlock( &p_input->stream.stream_lock );

    CDDAFixupPlayList(p_input, p_cdda, psz_source, play_single_track);

    p_input->pf_read = CDDARead;
    p_input->pf_seek = CDDASeek;
    p_input->pf_set_area = CDDASetArea;
    p_input->pf_set_program = CDDASetProgram;

    /* Update default_pts to a suitable value for cdda access */
    var_Create( p_input, MODULE_STRING "-caching",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_input, MODULE_STRING "-caching", &val );
    p_input->i_pts_delay = val.i_int * 1000;

    free( psz_source );

    /* Build a WAV header for the output data */
    memset( &p_cdda->waveheader, 0, sizeof(WAVEHEADER) );
    SetWLE( &p_cdda->waveheader.Format, 1 ); /*WAVE_FORMAT_PCM*/
    SetWLE( &p_cdda->waveheader.BitsPerSample, 16);
    p_cdda->waveheader.MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
    p_cdda->waveheader.Length = 0;                     /* we just don't know */
    p_cdda->waveheader.ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
    p_cdda->waveheader.SubChunkID  = VLC_FOURCC('f', 'm', 't', ' ');
    SetDWLE( &p_cdda->waveheader.SubChunkLength, 16);
    SetWLE( &p_cdda->waveheader.Modus, 2);
    SetDWLE( &p_cdda->waveheader.SampleFreq, 44100);
    SetWLE( &p_cdda->waveheader.BytesPerSample,
            2 /*Modus*/ * 16 /*BitsPerSample*/ / 8 );
    SetDWLE( &p_cdda->waveheader.BytesPerSec,
             16 /*BytesPerSample*/ * 44100 /*SampleFreq*/ );
    p_cdda->waveheader.DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
    p_cdda->waveheader.DataLength = 0;                 /* we just don't know */
    p_cdda->i_header_pos = 0;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * CDDAClose: closes cdda
 *****************************************************************************/
void
E_(Close)( vlc_object_t *p_this )
{
    input_thread_t *   p_input = (input_thread_t *)p_this;
    cdda_data_t *p_cdda = (cdda_data_t *)p_input->p_access_data;

    dbg_print( (INPUT_DBG_CALL|INPUT_DBG_EXT), "" );
    ioctl_Close( p_cdda->p_cddev );

    cdio_log_set_handler (uninit_log_handler);

#ifdef HAVE_LIBCDDB
    cddb_log_set_handler (uninit_log_handler);
    if (p_cdda->i_cddb_enabled)
      cddb_disc_destroy(p_cdda->cddb.disc);
#endif

    free( p_cdda->p_sectors );
    free( p_cdda );
    p_cdda_input = NULL;
}