[File] [PATCH] of Magdir/audio for encrypted Garmin Voice Processing Module (*.vpm)

[Christos Zoulas]

On Jan 4,  4:13am, joerg.jen.der.ek at gmx.net (=?UTF-8?Q?J=c3=b6rg_Jenderek?=) wrote:
-- Subject: [File] [PATCH] of Magdir/audio for encrypted Garmin Voice Process

| Hello,
| 
| some days ago i run file command version 5.35 on Garmin Voice Processing
| Module (*.vpm). Some are only described as "data".
| 
| Unfortunately there seems to exist at least 3 variants of Garmin VPM. In
| one variant Garmin Voice Processing Module is stored in a container
| format usually used for geographical cards. This IMG file format with
| reference is handled by Magdir/map some days ago. The other format start
| with magic "AUDIMG" and is already handled by Magdir/audio. This format
|  for non text-to-speech (TTS) contain hundreds of WAV audios. For every
| phrase like "turn left" a wav file is stored. This is visible by looking
| fo and counting magic RIFF (handled by Magdir/riff). Some clever
| programmers like "turboccc" recognize this and build their own audio
| tools to manipulate VPM files. Apparently Garmin do not like this and
| started to switch to an encrypted variant. This is visible when the VPM
| file does not contain any human readable string any more. Luckily such
| encrypted examples seem to start with the same byte sequence. This is
| now expressed by additional magic lines in Magdir/audio like
|  0 ubequad 0xa141190fecc8ced6 Garmin Voice Processing Module (encrypted)
|  !:mime	audio/x-vpm-garmin
|  !:ext	vpm
| Unfortunately there does not exist any web site about the encrypted VPM
| variant. But when you buy or download additional voices for the Garmin
| navigation devices like DrNightmare, Elfred, Yeti, these VPM files are
| encrypted. Garmin itself offer a software with name Voice Studio. This
| tool lets you create custom voices for your navigation device and stores
| the result as an encrypted VPM. So i add the product web site as URL.
| 
| After applying the above mentioned modifications by patch
| file-5.35-audio-garmin.diff then all inspected examples are now
| described by Magdir/audio like:
| 
| Deutsch__Marie.vpm:           Garmin Voice Processing Module (encrypted)
| DrNightmare.vpm:              Garmin Voice Processing Module (encrypted)
| Elfred.vpm:                   Garmin Voice Processing Module (encrypted)
| English_British_James.vpm:    Garmin Voice Processing Module (encrypted)
| English_British_Kate.vpm:     Garmin Voice Processing Module (encrypted)
| TeamGarmin-DaveZabriskie.vpm: Garmin Voice Processing Module (encrypted)
| test.vpm:                     Garmin Voice Processing Module (encrypted)
| test2garmin.vpm:              Garmin Voice Processing Module (encrypted)
| Turkce__Ipek.vpm:             Garmin Voice Processing Module (encrypted)
| Yeti.vpm:                     Garmin Voice Processing Module (encrypted)
| 
| I hope my diff file can be applied in future version of file utility.

Applied, thanks!

Happy New Year.

christos