[FFmpeg-devel] [PATCH] G.729 LSF decoding

[Vladimir Voroshilov]

2009/6/25 Michael Niedermayer <michaelni at gmx.at>:
> On Thu, Jun 25, 2009 at 09:45:59AM +0700, Vladimir Voroshilov wrote:
>> 2009/6/25 Michael Niedermayer <michaelni at gmx.at>:
> [...]
>> @@ -263,6 +282,12 @@ static const int16_t cb_ma_predictor[2][MA_NP][10] = { /* (0.15) */
>> ? ?}
>> ?};
>>
>> +/**
>> + * ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 15 ? ? ? ? 3
>> + * cb_ma_predictor_sum[j][i] = floor( 2 * (1.0 - sum ( cb_ma_predictor_float[j][k][i] ) ) )
>> + * ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?k=0
>
> vertical positions ...

fixed.

>
>
> [...]
>> @@ -169,6 +169,13 @@ static void lsf_decode(int16_t* lsfq, int16_t* past_quantizer_outputs[MA_NP + 1]
>> ? ? ?ff_acelp_reorder_lsf(lsfq, LSFQ_DIFF_MIN, LSFQ_MIN, LSFQ_MAX, 10);
>> ?}
>>
>> +/**
>> + * Restores LSP parameters using data from previous frame
> [...]
>> ?static void lsf_restore_from_previous(int16_t* lsfq,
>
> lsf or lsp ?

:(
Neither first not second (according to spec).
This routine restores past LSP quantizer output using LSF from previous frame.


>
> [...]
> --
> Michael ? ? GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> Awnsering whenever a program halts or runs forever is
> On a turing machine, in general impossible (turings halting problem).
> On any real computer, always possible as a real computer has a finite number
> of states N, and will either halt in less than N cycles or never halt.
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.9 (GNU/Linux)
>
> iD8DBQFKQ0OmYR7HhwQLD6sRAojEAKCIv907HuEbjqUQ9UsRrcSsdI44HACfbU3h
> VPl/oDeucdxHCAsRReh3R98=
> =q6Rp
> -----END PGP SIGNATURE-----
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at mplayerhq.hu
> https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel
>



-- 
Regards,
Vladimir Voroshilov     mailto:voroshil at gmail.com
JID: voroshil at gmail.com, voroshil at jabber.ru
ICQ: 95587719
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0004-Doxy-for-LSF-erasure-case.172.patch
Type: text/x-diff
Size: 2187 bytes
Desc: not available
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20090625/273fff26/attachment.patch>