[FFmpeg-devel] [PATCH] VP56: 32-byte align picture width

[Aurelien Jacobs]

On Sun, 13 Jul 2008 14:13:39 +0100
Mans Rullgard <mans at mansr.com> wrote:

> The VP5/6 decoder calls put_pixels16() on the chroma planes, so these
> need 16-byte alignment.  Setting luma alignment to 32 achieves this,
> although alignment of 16 is sufficient for the luma plane.
> ---
>  libavcodec/utils.c |    7 ++++++-
>  1 files changed, 6 insertions(+), 1 deletions(-)
> 
> diff --git a/libavcodec/utils.c b/libavcodec/utils.c
> index 5d9ee33..819548c 100644
> --- a/libavcodec/utils.c
> +++ b/libavcodec/utils.c
> @@ -127,7 +127,12 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
>      case PIX_FMT_YUVJ422P:
>      case PIX_FMT_YUVJ444P:
>      case PIX_FMT_YUVA420P:
> -        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
> +        //FIXME check for non mpeg style codecs and use less alignment
> +        if (s->codec_id == CODEC_ID_VP5 || s->codec_id == CODEC_ID_VP6 ||
> +            s->codec_id == CODEC_ID_VP6F)

You could also add VP6A here.
Except that, this looks a bit ugly, but I have no better idea.

Aurel