First test of Delphi Wrapper (MP4)

hamsen

Newbie

Beiträge: 42

First test of Delphi Wrapper (MP4)

« am: Februar 19, 2010, 06:20:56 »

I have tested reading MP4 files using Delphi.
These are my comments:

1) AUDIOAnalyzeFileW returns a boolean, should return smallInt.
2) MP4_CDSETNUMBER looks for ' dsk', should look for 'disk'.
3) Picturehandling should include a posibility to check for picturetype or change the fileextension of the passed filename. Otherwise special handling afterwards is necessary.
4) The atom 'cpil' can also contain the value 'true'.
5) No userdefined tagnames. The MP4 atom system has a number of predefined tags (all 4 bytes). But you are free to make them as long as you wish. Therefore it would be simpler and more flexible to do it like this:

a) MP4TextFrameW['disk']
b) MP4TextFrameW['©alb']
c) MP4TextFrameW['replaygain_track_gain']
etc.

6) Reading the picture works fine.

Regards
Thomas


	Gespeichert

audioxp

Newbie

Beiträge: 39

Re: First test of Delphi Wrapper (MP4)

« Antworten #1 am: Februar 20, 2010, 04:02:30 »

Concerning "AudioAnalyzeFileW": I've changed the datatype (in the wrapper) from smallint to boolean, because it is more "native" to work with boolean than this "-1" stuff. This is also the case for some more functions that return simply "-1=true, 0=false.
Thought this would make it easier; if you don't like it, feel free to change the wrapper :-)

The other issues belong to Stefan, I think...

Best regards
Ulrich (I've coded the current version of the wrapper)