title
Products            Buy            Support Forum            Professional            About            Codec Central
 
Page 1 of 2 12 LastLast
Results 1 to 15 of 16

Thread: FLAC & Ogg Vorbis Storage of CDTOC

  1. #1
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    FLAC & Ogg Vorbis Storage of CDTOC

    We have been asked over and over again by individuals / companies to offer storage of a CD TOC (table of contents from Audio CD) in Vorbis Comments, as no standard was forthcoming we have acted in creating a new standard:

    Tag Name:

    CDTOC

    Table of contents stored as a string made up from:

    [audio trackcount]+[first audio track address]+[second audio track address]....

    Track addresses are stored (LBA Address + 150), that is 2 seconds in for the first track.

    Special cases:

    CD Extra discs: the lead out address is added to the end, track count is still just for audio tracks.
    [data][audio] discs: as a normal CD, except on the end is +X[LBA of Data Track + 150]

    Example of ordinary Audio CD:

    Code:
    LBA FirstIndex: 1 last Index: 10
    Type: Audio Track 1  LBA Address: 0  Length: 00:04:08.733
    Type: Audio Track 2  LBA Address: 18655  Length: 00:04:34.760
    Type: Audio Track 3  LBA Address: 39262  Length: 00:04:19.573
    Type: Audio Track 4  LBA Address: 58730  Length: 00:04:14.867
    Type: Audio Track 5  LBA Address: 77845  Length: 00:03:27.960
    Type: Audio Track 6  LBA Address: 93442  Length: 00:03:09.867
    Type: Audio Track 7  LBA Address: 107682  Length: 00:04:02.466
    Type: Audio Track 8  LBA Address: 125867  Length: 00:03:44.040
    Type: Audio Track 9  LBA Address: 142670  Length: 00:04:04.334
    Type: Audio Track 10  LBA Address: 160995  Length: 00:04:37.666
    Type: Lead Out  LBA Address: 181820
    
    ID Tag CDTOC=A+96+4975+99F4+E600+130AB+16D98+1A538+1EC41+22DE4+27579+2C6D2
    Example of CD with Hidden First Track:

    Code:
    LBA FirstIndex: 1 last Index: 10
    Type: Audio Track 1 LBA Address: 8925 Length: 00:05:35.266
    Type: Audio Track 2 LBA Address: 34070 Length: 00:04:25.667
    Type: Audio Track 3 LBA Address: 53995 Length: 00:04:37.267
    Type: Audio Track 4 LBA Address: 74790 Length: 00:03:03.800
    Type: Audio Track 5 LBA Address: 88575 Length: 00:04:23.533
    Type: Audio Track 6 LBA Address: 108340 Length: 00:05:59.733
    Type: Audio Track 7 LBA Address: 135320 Length: 00:04:14.627
    Type: Audio Track 8 LBA Address: 154417 Length: 00:04:05.533
    Type: Audio Track 9 LBA Address: 172832 Length: 00:05:15.374
    Type: Audio Track 10 LBA Address: 196485 Length: 00:08:58.200
    Type: Lead Out LBA Address: 236850
    
    ID Tag CDTOC=A+2373+85AC+D381+124BC+15A95+1A7CA+2112E+25BC7+2A3B6+3001B+39DC8
    Special Case 1, Example of CD Extra CD:

    Code:
    LBA FirstIndex: 1 last Index: 14
    Type: Audio Track 1  LBA Address: 0  Length: 00:04:10.413
    Type: Audio Track 2  LBA Address: 18781  Length: 00:03:39.093
    Type: Audio Track 3  LBA Address: 35213  Length: 00:03:11.534
    Type: Audio Track 4  LBA Address: 49578  Length: 00:04:03.426
    Type: Audio Track 5  LBA Address: 67835  Length: 00:03:36.894
    Type: Audio Track 6  LBA Address: 84102  Length: 00:03:59.080
    Type: Audio Track 7  LBA Address: 102033  Length: 00:04:21.773
    Type: Audio Track 8  LBA Address: 121666  Length: 00:03:21.227
    Type: Audio Track 9  LBA Address: 136758  Length: 00:03:56.213
    Type: Audio Track 10  LBA Address: 154474  Length: 00:04:35.240
    Type: Audio Track 11  LBA Address: 175117  Length: 00:04:04.000
    Type: Audio Track 12  LBA Address: 193417  Length: 00:04:09.947
    Type: Audio Track 13  LBA Address: 212163  Length: 00:03:57.160
    Type: Data Track 14  LBA Address: 229950  Length: 00:11:27.480
    Type: Lead Out  LBA Address: 281511
    
    ID Tag CDTOC=D+96+49F3+8A23+C240+10991+1491C+18F27+1DBD8+216CC+25C00+2ACA3+2F41F+33D59+382D4+44C3D
    
    Notice the +44C3D is the lead out and track count of 13 (even though with last data track there are 14 tracks, so the track starting at 382D4 is a Data track)
    Special Case 2, Example of [data][audio] CD:

    Code:
        LBA FirstIndex: 1 last Index: 12
          Type: Data Track 1  LBA Address: 0  Length: 00:08:11.386
          Type: Audio Track 2  LBA Address: 36854  Length: 00:05:53.000
          Type: Audio Track 3  LBA Address: 63329  Length: 00:04:29.880
          Type: Audio Track 4  LBA Address: 83570  Length: 00:05:33.494
          Type: Audio Track 5  LBA Address: 108582  Length: 00:05:21.653
          Type: Audio Track 6  LBA Address: 132706  Length: 00:06:07.307
          Type: Audio Track 7  LBA Address: 160254  Length: 00:04:41.693
          Type: Audio Track 8  LBA Address: 181381  Length: 00:04:50.733
          Type: Audio Track 9  LBA Address: 203186  Length: 00:06:08.307
          Type: Audio Track 10  LBA Address: 230809  Length: 00:04:41.360
          Type: Audio Track 11  LBA Address: 251911  Length: 00:06:14.667
          Type: Audio Track 12  LBA Address: 280011  Length: 00:05:14.813
          Type: Lead Out  LBA Address: 303622
    
    CDTOC=B+908C+F7F7+14708+1A8BC+206F8+27294+2C51B+31A48+3862F+3D89D+44661+4A29C+X96
    
    Here the data track is signalled by +X96, which is 96 in Hex (the LBA start address, of 150)
    Incidently this tag is exactly the same as the WM/MCID tag in .wma (as created by Windows Media Player), or the ITOC tag of a Wave LIST tag, EXCEPT for the special cases listed above.
    Last edited by Spoon; 04-03-2008 at 11:14 AM.

  2. #2
    dBpoweramp Guru
    Join Date
    May 2004
    Posts
    1,176

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Spoon, thank you for addressing this. I certainly am no expert on this so I will simply repost Skamp's questions:

    http://www.hydrogenaudio.org/forums/...owtopic=59685*

    Now, I'd like to know how we're supposed to compute FreeDB DiscIDs without a lead-out address? Without first and last track numbers, how are we supposed to compute MusicBrainz DiscIDs? How are we supposed to handle discs with a data track as track 01? Discs with negative LBAs?
    Do we need some more before this is final?

  3. #3
    dBpoweramp Guru
    Join Date
    May 2004
    Posts
    1,176

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Quote Originally Posted by Spoon View Post

    Incidently this tag is exactly the same as the WM/MCID tag in .wma (as created by Windows Media Player), or the ITOC tag of a Wave LIST tag.
    Do we need an extended CD TOC (CDTOC+) to cover these extra issues. So we could have two tag fields, one that is consistent with WMP and one that includes the extra info.

  4. #4
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    This thread is about FLAC and Ogg CD TOC, existing WMA and Wave tags are not included.

  5. #5
    dBpoweramp Guru
    Join Date
    May 2004
    Posts
    1,176

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Quote Originally Posted by Spoon View Post
    This thread is about FLAC and Ogg CD TOC, existing WMA and Wave tags are not included.
    I know. My reference to WMP was related the FLAC specs you introduced being consistent with the current MS implementation, which I thought was one of your goals.

  6. #6
    dBpoweramp Guru
    Join Date
    Feb 2007
    Posts
    793

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Are there other bits that could be considered -- like CD-Text, or Pre-Emphasis or HDCD?

    (Pardon my ignorance.)

  7. #7
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    CD Text is saved in ID Tags, HDCD should be diecoded to 24 bit on ripping, Pre-Emph should also have the de-emph applied on ripping.

  8. #8
    dBpoweramp Guru
    Join Date
    Feb 2007
    Posts
    793

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Quote Originally Posted by Spoon View Post
    Pre-Emph should also have the de-emph applied on ripping.
    E.T.A. in dBpoweramp? ;-)

  9. #9
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    A while (it has missed R13).

  10. #10
    dBpoweramp Guru
    Join Date
    Feb 2007
    Posts
    793

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Bumping an old thread I know, but: This TOC is incomplete as far as index points go. Is that the only information missing compared e.g. to a cuesheet?

  11. #11
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Index points are not in the TOC, they are subchannel.

  12. #12
    dBpoweramp Guru
    Join Date
    May 2004
    Posts
    1,176

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Quote Originally Posted by Spoon View Post
    Pre-Emph should also have the de-emph applied on ripping.
    want to echo porcus' question above, will dBpoweramp soon set a flag for this or de-emph at ripping?

  13. #13
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    >will dBpoweramp soon set a flag for this or de-emph at ripping?

    I will add as a wish request for r14.2

  14. #14

    Join Date
    Mar 2014
    Posts
    2

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    Hello!

    Can I ask you what program create this data? I want to get the text file with it.

    I'm using cdrdao read-toc command, but it write looks like this:

    CD_DA


    // Track 1
    TRACK AUDIO
    NO COPY
    NO PRE_EMPHASIS
    TWO_CHANNEL_AUDIO
    FILE "data.wav" 0 09:24:30


    // Track 2
    TRACK AUDIO
    NO COPY
    NO PRE_EMPHASIS
    TWO_CHANNEL_AUDIO
    FILE "data.wav" 09:24:30 05:42:43
    It's good, but I want more detailed information, looks like cdrdao's cmd echo text. I tried to write its result in file, but it's empy(

    Thanks!
    Last edited by Acuna; 03-14-2014 at 12:37 PM.

  15. #15
    Administrator
    Join Date
    Apr 2002
    Posts
    38,267

    Re: FLAC & Ogg Vorbis Storage of CDTOC

    dBpoweramp writes this information.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •