[FFmpeg-devel] [PATCH] VAAPI: Fix MPEG-4 decoding of video clips with B-frames

[Michael Niedermayer]

On Tue, Apr 13, 2010 at 09:12:06AM +0200, Gwenole Beauchesne wrote:
> Hi,
>
> This patch fixes MPEG-4 decoding of video clips with B-frames. This works 
> on NVIDIA HW but GMA500 seems to require this addition, which looks weird 
> to me:
>
> --- a/libavcodec/vaapi_mpeg4.c
> +++ b/libavcodec/vaapi_mpeg4.c
> @@ -91,9 +91,11 @@ static int vaapi_mpeg4_start_frame(AVCodecContext 
> *avctx, av_unused const uint8_
>      pic_param->TRB                                      = s->pb_time;
>      pic_param->TRD                                      = s->pp_time;
>
> -    if (s->pict_type == FF_B_TYPE)
> -        pic_param->backward_reference_picture = 
> ff_vaapi_get_surface_id(&s->next_picture);
> -    if (s->pict_type != FF_I_TYPE)
> +    if (s->pict_type == FF_B_TYPE) {
> +        pic_param->forward_reference_picture  = 
> ff_vaapi_get_surface_id(&s->next_picture);
> +        pic_param->backward_reference_picture = 
> ff_vaapi_get_surface_id(&s->last_picture);
> +    }
> +    else if (s->pict_type != FF_I_TYPE)
>          pic_param->forward_reference_picture  = 
> ff_vaapi_get_surface_id(&s->last_picture);

patch mangled

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

Into a blind darkness they enter who follow after the Ignorance,
they as if into a greater darkness enter who devote themselves
to the Knowledge alone. -- Isha Upanishad
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20100413/6332476c/attachment.pgp>