Hi Thomas, is there also a fixed point implementation available from mpglib or mpg123?? Or is this SHARP DSP already in fixed point?
cheers Robert -------- Original-Nachricht -------- Datum: Thu, 18 Jan 2007 01:37:45 +0100 Von: Thomas Orgis <[EMAIL PROTECTED]> An: mp3encoder@minnie.tuhs.org CC: Betreff: Re: [mp3encoder] mpglib/mpg123 MP3 Decoding > Am Tue, 16 Jan 2007 13:08:21 +0100 > schrieb "Robert Leiking" <[EMAIL PROTECTED]>: > > > > There already was an attempt to make mpglib work on a SHARC 32bit DSP, > > Maybe you could give me some more information about this stuff: > > Well, we started working on a branch of mpglib for this dsp. Including > giving the result as 32bit float instead of converting to integers... > Not too much changes were needed, actually. There were some bugs that > arised from the fact that every data type on this dsp was 32 bits wide. > Well, you can see what happened there via > > http://mpg123.de/cgi-bin/viewvc.cgi/mpglib/sharc_dsp/ > > > > > > What do this members of the structure mp3data_struct in mpglib.h > mean:"ssize, dsize, bsize, bsnum"? > > > > > > In this structure: Does "framesize","fsizeold" represent the number of > samples within one mp3 frame (1152 for a Mp3 file, right?) or does it mean > the length of a frame in bytes? > > > > > These are for the frame data size. The number of of samples is normally > 1152, but can be 576 or 384 ... that number should be the same throughout a > file. > Frame data size depends on the bitrate and can vary for VBR files (which > consist of frames with differing bitrate values), short: > > fr->framesize = (long) tabsel_123[fr->lsf][2][fr->bitrate_index] * > 144000; > > ;-) > > Alrighty then, > > Thomas. > > -- > Thomas Orgis - Source Mage GNU/Linux Developer > (http://www.sourcemage.org) OrgisNetzOrganisation ---)=- > http://orgis.org GPG public key: http://thomas.orgis.org/public_key > _______________________________________________ > mp3encoder mailing list > mp3encoder@minnie.tuhs.org > https://minnie.tuhs.org/mailman/listinfo/mp3encoder -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org https://minnie.tuhs.org/mailman/listinfo/mp3encoder
