[Ffmpeg-devel] [PATCH] Fix DTS in WAV file playback. (original) (raw)

Måns Rullgård mru
Sat Feb 18 18:30:21 CET 2006

Benjamin Zores writes:

Hi,

The following patch allow playback of WAV files with broken DTS format ID. Currently, DTS codec is supposed to be referenced as 0x2001 but I've never seen a sample with such an ID. Most of DTS samples in WAV are using 0x01 (which is PCM reserved) which is of course a broken behavior, but so is life.

The reason they are made this way is so they can be burned to an audio CD using regular software, and played back using DTS-aware hifi gear. Most burning programs are stupid, and will refuse to burn a file if they believe it contains anything but PCM audio, or will attempt to decode it before burning. This is just an explanation, not an excuse.

So the patch checks for begining of bytestream to match some DTS known-bytestream.

That will do the right thing with some files, but not all. Often there is some other junk before the first DTS frame.

-- M?ns Rullg?rd mru at inprovide.com

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