cdda2wav.c

刻录光盘的程序

		fprintf(stderr, "overlap:min/max/cur, jitter, percent_done:\n??/??/??/???????   0%%"); \
	else \
		fputs("percent_done:\n  0%", stderr); \
   }

#if defined HAVE_FORK_AND_SHAREDMEM
static void forked_read __PR((void));

/* This function does all audio cdrom reads
 * until there is nothing more to do
 */
static void
forked_read()
{
   unsigned total_unsuccessful_retries = 0;

#if !defined(HAVE_SEMGET) || !defined(USE_SEMAPHORES)
   init_child();
#endif

   minover = global.nsectors;

   PRINT_OVERLAP_INIT
   while (global.iloop) { 

      do_read(get_next_buffer(), &total_unsuccessful_retries);

      define_buffer();

   } /* while (global.iloop) */
   flush_buffers();

   if (total_unsuccessful_retries) {
      fprintf(stderr,"%u unsuccessful matches while reading\n",total_unsuccessful_retries);
   }
}

static void forked_write __PR((void));

static void
forked_write()
{

    /* don't need these anymore.  Good security policy says we get rid
       of them ASAP */
    neverneedroot();
    neverneedgroup();

#if defined(HAVE_SEMGET) && defined(USE_SEMAPHORES)
#else
    init_parent();
#endif

    while (nSamplesDone < nSamplesToDo) {

      /* get oldest buffers */
      
      nSamplesDone = do_write(get_oldest_buffer());

      if (global.parent_died == 0) {
        drop_buffer();
      }

    } /* end while */


    if (global.verbose) {
      if (global.tracktitle[current_track -1] != NULL) {
        fprintf( stderr, "  track %2u '%s' successfully recorded\n",
		current_track, global.tracktitle[current_track-1]);
      } else {
        fprintf( stderr, "  track %2u successfully recorded\n", current_track);
      }
    }
}
#else

/* This function implements the read and write calls in one loop (in case
 * there is no fork/thread_create system call).
 * This means reads and writes have to wait for each other to complete.
 */
static void nonforked_loop __PR((void));

static void
nonforked_loop()
{
    unsigned total_unsuccessful_retries = 0;

    minover = global.nsectors;

    PRINT_OVERLAP_INIT
    while (global.iloop) { 

      do_read(get_next_buffer(), &total_unsuccessful_retries);

      do_write(get_oldest_buffer());

    }

    if (total_unsuccessful_retries) {
      fprintf(stderr,"%u unsuccessful matches while reading\n",total_unsuccessful_retries);
    }

    if (global.verbose) {
      if (global.tracktitle[current_track -1] != NULL) {
        fprintf( stderr, "  track %2u '%s' successfully recorded\n",
		current_track, global.tracktitle[current_track-1]);
      } else {
        fprintf( stderr, "  track %2u successfully recorded\n", current_track);
      }
    }
}
#endif

/* and finally: the MAIN program */
int main( argc, argv )
	int argc;
	char *argv [];
{
  long lSector_p1;
  long sector_offset = 0;
  unsigned long endtrack = 1;
  double rectime = DURATION;
  int cd_index = -1;
  double int_part;
  int littleendian = -1;
  int just_the_toc = 0;
  char int_name[100];
#ifdef  ECHO_TO_SOUNDCARD
  static char user_sound_device[200] = "";
#endif /* ECHO_TO_SOUNDCARD */
  int c;
#ifdef USE_GETOPT_LONG
  int long_option_index=0;
#endif /* USE_GETOPT_LONG */
  int am_i_cdda2wav;
  char * env_p;
  int tracks_included;

  strcpy(int_name, DEF_INTERFACE);
  strcpy(audio_type, AUDIOTYPE);
  save_args(argc, argv);

  /* init global variables */
  init_globals();

  /* When being invoked as list_audio_tracks, just dump a list of
     audio tracks. */
  am_i_cdda2wav = strcmp(argv[0],"list_audio_tracks");
  if (!am_i_cdda2wav) global.verbose = SHOW_JUSTAUDIOTRACKS;

  /* Control those set-id privileges... */
  initsecurity();

  env_p = getenv("CDDA_DEVICE");
  if (env_p != NULL) {
    strncpy( global.dev_name, env_p, sizeof(global.dev_name) );
    global.dev_name[sizeof(global.dev_name)-1]=0;
  }

  /* command options parsing */
#ifdef USE_GETOPT_LONG
  while ( (c = getopt_long (argc,argv,optstring,options,&long_option_index)) 
		!= EOF)
#else
  while ( (c = getopt(argc, argv, optstring)) != EOF )
#endif /* USE_GETOPT_LONG */
	{
    switch (c) {
      case 'D':    /* override device */
        strncpy( global.dev_name, optarg, sizeof(global.dev_name) );
        global.dev_name[sizeof(global.dev_name)-1]=0;
	break;
      case 'A':    /* override device */
        strncpy( global.aux_name, optarg, sizeof(global.aux_name) );
        global.aux_name[sizeof(global.aux_name)-1]=0;
	break;
      case 'I':    /* override interface */
	strncpy( int_name, optarg, sizeof(int_name) );
        int_name[sizeof(int_name)-1]=0;
	break;
#ifdef  ECHO_TO_SOUNDCARD
      case 'K':    /* override sound device */
	strncpy( user_sound_device, optarg, sizeof(user_sound_device) );
        user_sound_device[sizeof(user_sound_device)-1]=0;
	break;
#endif /* ECHO_TO_SOUNDCARD */

      /* the following options are relevant to 'cdda2wav' only */
#ifdef MD5_SIGNATURES
      case 'M':
        if (!am_i_cdda2wav) break;
	global.md5blocksize = strtoul( optarg, NULL, 10 );
        break;
#endif
      case 'O':    /* override audio type */
        if (!am_i_cdda2wav) break;
	strncpy( audio_type, optarg, 4);
        audio_type[sizeof(audio_type)-1]=0;
	break;
      case 'C':    /* override input endianess */
        if (!am_i_cdda2wav) break;
	if (strcasecmp(optarg, "little") == 0) {
	   littleendian = 1;
	} else 
	if (strcasecmp(optarg, "big") == 0) {
	   littleendian = 0;
	} else 
	if (strcasecmp(optarg, "guess") == 0) {
	   littleendian = -2;
	} else {
	   usage2("wrong parameter '%s' for option -C", optarg);
	}
	break;
      case 'E':    /* override output endianess */
        if (!am_i_cdda2wav) break;
	if (strcasecmp(optarg, "little") == 0) {
	   global.outputendianess = LITTLE;
	} else 
	if (strcasecmp(optarg, "big") == 0) {
	   global.outputendianess = BIG;
	} else {
	   usage2("wrong parameter '%s' for option -E", optarg);
	}
	break;
      case 'c':    /* override channels */
        if (!am_i_cdda2wav) break;
	if (optarg[0] == 's') {
		global.channels = 2;
		global.swapchannels = 1;
	} else {
		global.channels = strtol( optarg, NULL, 10);
	}
	break;
      case 'S':    /* override drive speed */
        if (!am_i_cdda2wav) break;
	global.userspeed = strtoul( optarg, NULL, 10);
	break;
      case 'l':    /* install a ring buffer with 'buffers' elements */
        if (!am_i_cdda2wav) break;
        global.buffers = strtoul( optarg, NULL, 10);
        break;
      case 'b':    /* override bits */
        if (!am_i_cdda2wav) break;
	bits = strtol( optarg, NULL, 10);
	break;
      case 'r':    /* override rate */
        if (!am_i_cdda2wav) break;
	rate = strtol( optarg, NULL, 10);
	break;
      case 'a':    /* override rate */
        if (!am_i_cdda2wav) break;
	if (strtod( optarg, NULL ) != 0.0)
	    rate = 44100.0 / strtod( optarg, NULL );
	else {
	    fprintf(stderr, "-a requires a nonzero, positive divider.\n");
	    exit ( 1 );
	}
	break;
      case 't':    /* override start track */
        if (!am_i_cdda2wav) break;
	{
	char * endptr;
	char * endptr2;
	track = strtoul( optarg, &endptr, 10 );
	endtrack = strtoul( endptr, &endptr2, 10 );
	if (endptr2 == endptr)
		endtrack = track;
	break;
	}
      case 'i':    /* override start index */
        if (!am_i_cdda2wav) break;
	cd_index = strtoul( optarg, NULL, 10);
	break;
      case 'd':    /* override recording time */
        if (!am_i_cdda2wav) break;
	/* we accept multiple formats now */
	{ char *end_ptr = NULL;
	  rectime = strtod( optarg, &end_ptr );
	  if (*end_ptr == '\0') {
	  } else if (*end_ptr == 'f') {
	    rectime = rectime / 75.0;
	/* TODO: add an absolute end of recording. */
#if	0
	  } else if (*end_ptr == 'F') {
	    rectime = rectime / 75.0;
#endif
	  } else
	    rectime = -1.0;
	}
	break;
      case 'o':    /* override offset */
        if (!am_i_cdda2wav) break;
	sector_offset = strtol( optarg, NULL, 10);
	break;
      case 'n':    /* read sectors per request */
        if (!am_i_cdda2wav) break;
	global.nsectors = strtoul( optarg, NULL, 10);
	break;

       /*-------------- RS 98 -------------*/
      case 'p':    /* specify playback pitch rate */
        global.playback_rate = strtol( optarg, NULL, 10);
        RestrictPlaybackRate( global.playback_rate );
        global.need_hostorder = 1;
        break;
      case 'P':    /* set initial overlap sectors */
        if (!am_i_cdda2wav) break;
	global.useroverlap = strtol( optarg, NULL, 10);
	break;

      case 's':    /* stereo */
        if (!am_i_cdda2wav) break;
	global.channels = 2;
	break;
      case 'm':    /* mono */
        if (!am_i_cdda2wav) break;
	global.channels = 1;
        global.need_hostorder = 1;
	break;
      case 'x':    /* max */
        if (!am_i_cdda2wav) break;
	global.channels = 2; bits = 16; rate = 44100;
	break;
      case 'w':    /* wait for some audio intensity */
        if (!am_i_cdda2wav) break;
	waitforsignal = 1;
	break;
      case 'F':    /* find extreme amplitudes */
        if (!am_i_cdda2wav) break;
	global.findminmax = 1;
        global.need_hostorder = 1;
	break;
      case 'G':    /* find if mono */
        if (!am_i_cdda2wav) break;
	global.findmono = 1;
	break;
      case 'e':	   /* echo to soundcard */
        if (!am_i_cdda2wav) break;
#ifdef	ECHO_TO_SOUNDCARD
	global.echo = 1;
        global.need_hostorder = 1;
#else
	fprintf(stderr, "There is no sound support compiled into %s.\n",argv[0]);
#endif
	break;	
      case 'v':    /* tell us more */
        if (!am_i_cdda2wav) break;
	global.verbose = strtol( optarg, NULL, 10);
	break;
      case 'q':    /* be quiet */
        if (!am_i_cdda2wav) break;
	global.quiet = 1;
	global.verbose = 0;
	break;
      case 'N':    /* don't write to file */
        if (!am_i_cdda2wav) break;
	global.no_file = 1;
	global.no_infofile = 1;
	global.no_cddbfile = 1;
	break;
      case 'J':    /* information only */
        if (!am_i_cdda2wav) break;
	global.verbose = SHOW_MAX;
	just_the_toc = 1;
	bulk = 1;
	break;
      case 'g':	   /* screen output formatted for guis */
        if (!am_i_cdda2wav) break;
#ifdef	Thomas_will_es
	global.no_file = 1;
	global.no_infofile = 1;
	global.no_cddbfile = 1;
	global.verbose = SHOW_MAX;
#endif
	global.gui = 1;
	break;
      case 'Q':   /* silent scsi mode */
	global.scsi_silent = 1;
	break;
      case 'H':    /* don't write extra files */
        if (!am_i_cdda2wav) break;
	global.no_infofile = 1;
	global.no_cddbfile = 1;
	break;
      case 'B':    /* bulk transfer */
        if (!am_i_cdda2wav) break;
	bulk = 1;
	break;
      case 'T':    /* do deemphasis on the samples */
        if (!am_i_cdda2wav) break;
	global.deemphasize = 1;
        global.need_hostorder = 1;
	break;
      case 'R':    /* list available rates */
        if (!am_i_cdda2wav) break;
	{ int ii;
	  fprintf(stderr, "Cdda2wav version %s: available rates are:\nRate   Divider      Rate   Divider      Rate   Divider      Rate   Divider\n", VERSION );
	  for (ii = 1; ii <= 44100 / 880 / 2; ii++) {
	    long i2 = ii;
	    fprintf(stderr, "%-7g  %2ld         %-7g  %2ld.5       ",
                    44100.0/i2,i2,44100/(i2+0.5),i2);
	    i2 += 25;
	    fprintf(stderr, "%-7g  %2ld         %-7g  %2ld.5\n",
                    44100.0/i2,i2,44100/(i2+0.5),i2);
	    i2 -= 25;
	  }
	}
	exit(0);
	break;
      case 'V':
        if (!am_i_cdda2wav) break;
	global.scsi_verbose++;	/* XXX nach open_scsi() scgp->verbose = .. !!!! */
	break;
      case 'h':
	usage();
	break;
      default:
#ifdef USE_GETOPT_LONG
	fputs ("use cdda2wav --help to get more information.\n", stderr);
#else
	fputs ("use cdda2wav -h to get more information.\n", stderr);
#endif
	exit (1);
    }
  }

  /* check all parameters */
  if (global.verbose < 0 || global.verbose > SHOW_MAX) {
    usage2("Incorrect verbose level setting: %d",global.verbose);
  }
  if (global.verbose == 0) global.quiet = 1;

  if ( rectime < 0.0 ) {
    usage2("Incorrect recording time setting: %d.%02d",
			(int)rectime, (int)(rectime*100+0.5) % 100);
  }

  if ( global.channels != 1 && global.channels != 2 ) {
    usage2("Incorrect channel setting: %d",global.channels);
  }