[FFmpeg-devel] [PATCH] avfilter/vf_convolution: add 16-column operation for filter_column() to prepare for x86 SIMD.

[徐鋆]

Hi, Steven

----- 原始邮件 -----
发件人: "Steven Liu" <lq at chinaffmpeg.org>
收件人: "FFmpeg development discussions and patches" <ffmpeg-devel at ffmpeg.org>
抄送: "Steven Liu" <lq at chinaffmpeg.org>
发送时间: 星期一, 2019年 12 月 02日 上午 10:44:48
主题: Re: [FFmpeg-devel] [PATCH] avfilter/vf_convolution: add 16-column operation for filter_column() to prepare for x86 SIMD.

> 在 2019年12月2日，10:42，徐鋆 <xujunzz at sjtu.edu.cn> 写道：
> 
> I'm sorry not to reply in time.
> 
> The performance of this C code is about 10% better than the existing C code.
> 
> It will have a bigger improvement after X86 SIMD optimizations.

1. How to test?
1. 怎么测试的?
1. どうやってテストしたの?

I tested using this command:

./ffmpeg_g -s 1280*720 -pix_fmt yuv420p -i test.yuv -vf convolution="1 2 3 4 5 6 7 8 9:1 2 3 4 5 6 7 8 9:1 2 3 4 5 6 7 8 9:1 2 3 4 5 6 7 8 9:1/45:1/45:1/45:1/45:1:2:3:4:column:column:column:column" -an -vframes 2000 -f null /dev/null 

The FPS increases from 329 to 365 on my local machine.

2. Don’t TOP-Posting: https://en.wikipedia.org/wiki/Top-posting
2. 回邮件要在你回的那一条的下面回复，别再最上面回复，人家看不懂你是针对的哪一条
2. 返信メールは、あなたが返信した項目の下にある。一番上に返信しないと、あなたが何を狙っているのか分からない

Thank you for reminding me. I'm new here. Forgive me for not knowing the rules:)

> 
> Xu Jun
> 
> ----- 原始邮件 -----
> 发件人: "Carl Eugen Hoyos" <ceffmpeg at gmail.com>
> 收件人: "FFmpeg development discussions and patches" <ffmpeg-devel at ffmpeg.org>
> 发送时间: 星期四, 2019年 11 月 28日 上午 12:19:44
> 主题: Re: [FFmpeg-devel] [PATCH] avfilter/vf_convolution: add 16-column operation for filter_column() to prepare for x86 SIMD.
> 
> Am Mi., 27. Nov. 2019 um 15:56 Uhr schrieb <xujunzz at sjtu.edu.cn>:
> 
>> From: Xu Jun <xujunzz at sjtu.edu.cn>
>> 
>> In order to add x86 SIMD for filter_column(), I write a C function which processes 16 columns at a time.
> 
> How does this perform compared to the existing C code?
> 
> Carl Eugen
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> -- 
> 敬颂钧安, 
> 徐鋆 
> 电子信息与电气工程学院 
> 上海交通大学 
> 邮箱：xujunzz at sjtu.edu.cn 
> 地址：上海市闵行区东川路800号 
> 
> Yours sincerely, 
> Xylem（Jun Xu） 
> School of Electronic, Information and Electrical Engineering 
> Shanghai Jiao Tong University 
> Email: xujunzz at sjtu.edu.cn 
> No. 800, Dongchuan Road, Minhang District, Shanghai 200240, China 
> 
> 宜しくお愿いたします 
> 徐鋆 
> 電子情報と電気工程学院 
> 上海交通大学 
> メールアドレス ：xujunzz at sjtu.edu.cn 
> 住所：上海市閔行区ドンチュワンルー800号
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Thanks
Steven





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-- 
敬颂钧安, 
徐鋆 
电子信息与电气工程学院 
上海交通大学 
邮箱：xujunzz at sjtu.edu.cn 
地址：上海市闵行区东川路800号 

Yours sincerely, 
Xu Jun
School of Electronic, Information and Electrical Engineering 
Shanghai Jiao Tong University 
Email: xujunzz at sjtu.edu.cn 
No. 800, Dongchuan Road, Minhang District, Shanghai 200240, China 

宜しくお愿いたします 
徐鋆 
電子情報と電気工程学院 
上海交通大学 
メールアドレス ：xujunzz at sjtu.edu.cn 
住所：上海市閔行区ドンチュワンルー800号