[MPlayer-dev-eng] [PATCH] [TEST AFILTER] Encode ac3 at runtime using lavc

[Ulion]

2007/11/20, Diego Biurrun <diego at biurrun.de>:
> On Tue, Nov 20, 2007 at 04:38:13PM +0800, Ulion wrote:
> > 2007/11/20, Ulion <ulion2002 at gmail.com>:
> > > >
> > > > Here's the fixed version. Still need peoples familar with encoder or
> > > > ac3 or audio filter give suggestions and helps.
> > >
> > > Missed attachment.
> >
> > Sorry for my mistake in Makefile, fix again.
> >
> > --- DOCS/man/en/mplayer.1     (revision 25106)
> > +++ DOCS/man/en/mplayer.1     (working copy)
> > @@ -4695,6 +4695,30 @@
> > +.B lavcac3enc[=tospdif[:bitrate[:minchn]]]
> > +Encode multi-channel audio to AC-3 at runtime using libavcodec.
> > +Supports input 16-bit little-endian or big-endian format, max 6 channels.
>
> input formats
>
> Try not to use abbreviations, i.e. max --> maximum
>
> > +Need to specify '\-channels N' to make the decoder decode audio into N channels,
> > +then the filter can encode the N channels input to AC-3.
>
> "You need to", please keep lines below 80 characters.
>
> > +.IPs <tospdif>
> > +Output raw AC-3 stream if zero or not set,
> > +output to S/PDIF for passthrough when <tospdif> is set non-zero.
> > +.IPs <bitrate>
> > +The bitrate to encode the A??-3 stream, default 192kbits for 2ch,
>
> Spurious (Chinese?) character, avoid abbreviations.
>
> > +384kbits for more channels if not set.
> > +Either set it with 384 or 384000 to got 384kbits.
>
> s/with/to/, s/got/get/
>
> > +.IPs <minchn>
> > +Minimum channel number of the input audio to use this filter (default: 5).
> > +If input channel number is less than <minchn>, filter will detach itself.
>
> If the input channel number is less than <minchn>, the filter will
> detach itself.
>
> > --- libaf/af_lavcac3enc.c     (revision 0)
> > +++ libaf/af_lavcac3enc.c     (revision 0)
> > @@ -0,0 +1,289 @@
> > +/*
> > + * Audio filter for encoding AC-3 stream at runtime using libavcodec.
>
> Audio filter for runtime AC-3 encoding with libavcodec
>
> > +#ifndef AC3_FRAME_SIZE
> > +#define AC3_FRAME_SIZE 1536
> > +#endif
>
> Is this needed?  Where else is it defined?

ac3.h in libavcodec, but since we do not use it directly, so I define
it if not defined. Other format all fixed as you suggested.

-- 
Ulion
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