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From: James Almer <jamrial@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: Re: [FFmpeg-devel] [PATCH 5/7] avcodec/vc2enc: Avoid relocations for short strings
Date: Tue, 28 May 2024 00:07:41 -0300
Message-ID: <38e60694-4024-413a-81d8-dfd2c7a7c680@gmail.com> (raw)
In-Reply-To: <AS8P250MB0744309AA8FCF83F7753405E8FF12@AS8P250MB0744.EURP250.PROD.OUTLOOK.COM>

On 5/27/2024 11:49 PM, Andreas Rheinhardt wrote:
> These strings are so short that they can be put directly
> into the containing structure, avoiding the pointer
> and putting it into .rodata.
> Also use chars for interlaced and level while at it, as
> these are so small.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
> ---
>   libavcodec/vc2enc.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/libavcodec/vc2enc.c b/libavcodec/vc2enc.c
> index 3285218724..8b9641916a 100644
> --- a/libavcodec/vc2enc.c
> +++ b/libavcodec/vc2enc.c
> @@ -41,8 +41,9 @@
>   typedef struct VC2BaseVideoFormat {
>       enum AVPixelFormat pix_fmt;
>       AVRational time_base;
> -    int width, height, interlaced, level;
> -    const char *name;
> +    int width, height;
> +    char interlaced, level;

Use a fixed size type like uint8_t and not char. Neither of these values 
are characters (interlace should strictly speaking be a bool, but afaict 
that's not portable).

> +    char name[13];
>   } VC2BaseVideoFormat;
>   
>   static const VC2BaseVideoFormat base_video_fmts[] = {
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  reply	other threads:[~2024-05-28  3:07 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-28  2:47 [FFmpeg-devel] [PATCH 1/7] avcodec/vc2enc: Avoid void* where possible Andreas Rheinhardt
2024-05-28  2:49 ` [FFmpeg-devel] [PATCH 2/7] avcodec/vc2enc: Constify slices->main context pointers Andreas Rheinhardt
2024-05-28  2:49 ` [FFmpeg-devel] [PATCH 3/7] avcodec/vc2enc: Remove superfluous error message Andreas Rheinhardt
2024-05-28  2:49 ` [FFmpeg-devel] [PATCH 4/7] avcodec/vc2enc: Fix slice length Andreas Rheinhardt
2024-05-28  2:49 ` [FFmpeg-devel] [PATCH 5/7] avcodec/vc2enc: Avoid relocations for short strings Andreas Rheinhardt
2024-05-28  3:07   ` James Almer [this message]
2024-05-28  6:38     ` Rémi Denis-Courmont
2024-05-28 14:25   ` Lynne via ffmpeg-devel
2024-05-28  2:49 ` [FFmpeg-devel] [PATCH 6/7] avcodec/vc2enc: Move transient PutBitContext from ctx to stack Andreas Rheinhardt
2024-05-28  2:49 ` [FFmpeg-devel] [PATCH 7/7] avcodec/vc2enc: Use already available AVPixFmtDescriptor Andreas Rheinhardt
2024-05-30 18:53 ` [FFmpeg-devel] [PATCH 1/7] avcodec/vc2enc: Avoid void* where possible Andreas Rheinhardt

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