[FFmpeg-devel] [PATCH] mpeg12.c: add HW acceleration hooks

[Michael Niedermayer]

On Wed, Feb 25, 2009 at 10:47:31PM +0100, Gwenole Beauchesne wrote:
> Le 25 f?vr. 09 ? 20:17, Michael Niedermayer a ?crit :
> 
> >> @@ -1697,6 +1703,20 @@ static int mpeg_decode_slice(Mpeg1Context  
> >> *s1, int mb_y,
> >>
> >>     s->mb_x=0;
> >>
> >> +    if (avctx->hwaccel) {
> >> +        const uint8_t *buf_end, *buf_start = *buf - 4; /* include  
> >> start_code */
> >> +        int start_code = -1;
> >> +        buf_end = ff_find_start_code(buf_start + 2, *buf +  
> >> buf_size, &start_code);
> >> +        if (buf_end < *buf + buf_size)
> >> +            buf_end -= 4;
> >> +        s->resync_mb_x = s->mb_x;
> >> +        s->resync_mb_y = s->mb_y = mb_y;
> >> +        if (avctx->hwaccel->decode_slice(avctx, buf_start, buf_end  
> >> - buf_start) < 0)
> >> +            return DECODE_SLICE_ERROR;
> >> +        *buf = buf_end;
> >> +        return DECODE_SLICE_OK;
> >> +    }
> >> +
> >>     for(;;) {
> >>         int code = get_vlc2(&s->gb, mbincr_vlc.table,  
> >> MBINCR_VLC_BITS, 2);
> >>         if (code < 0){
> >
> > iam still investigating the need for this mess
> 
> (i) determine the end of the slice (and thus its size), (ii) slice  
> vertical position. Granted, for (ii), only s->mb_y = mb_y; is useful.  
> Would the hunk be ok with the others ripped off?

yes

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No snowflake in an avalanche ever feels responsible. -- Voltaire
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