[FFmpeg-devel] [RFC][PATCH] Windows Television (WTV) file system handling (original) (raw)

Michael Niedermayer michaelni
Tue Jan 11 00:33:59 CET 2011

On Sun, Jan 09, 2011 at 05:21:20PM +1100, Peter Ross wrote:

Hi,

The Windows Television (WTV) file format is a more complex beast than initially imagined. WTV is best viewed as a file system. Metadata, seek index tables, and chunked data are stored in separate files within. The fileystem uses a simple hierarchical file allocation table, with standard (4k) and big (256k) sector sizes. Standard FAT concepts apply, like fragmentation and the existence of slack space. The current WTV demuxer is not aware of the file system, and therefore only works on smalls wtv samples (<600MiB) where the files are not fragmented. Most WTV recordings are much larger. e.g. a 3hr HD recording of the tennis results in a 24GiB file and lots of fragmentation. Due to the complexity, I would really appreciate comments on the patch, especially my use of ByteIOContext.

Which part of the ByteIOContext use do you want comments about?

[...]

Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Its not that you shouldnt use gotos but rather that you should write readable code and code with gotos often but not always is less readable -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 198 bytes Desc: Digital signature URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20110111/ea1d604d/attachment.pgp>

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