[FFmpeg-devel] [PATCH] Patch cleanup for MPEG 1 & 2 optimizations

Keiji Costantini lists
Wed Apr 16 22:31:34 CEST 2008

Benoit Fouet ha scritto:
> Hi,
> strites wrote:
>> diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
>> index c128949..ba0e73b 100644
>> --- a/libavcodec/mpegvideo.c
>> +++ b/libavcodec/mpegvideo.c
>> @@ -1978,6 +1978,7 @@ skip_idct:
>>      }
>>  }
>> +av_always_inline
>>  void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]){
> what exactly is the point of this hunk ??

I corrected that and got actually a speed gain.

bench: utime=27.487s
bench: utime=27.478s
bench: utime=27.673s
bench: utime=27.264s
bench: utime=27.556s
bench: utime=27.537s
bench: utime=27.576s
bench: utime=27.458s
bench: utime=27.709s
bench: utime=27.484s

real    4m37.847s
user    4m35.313s
sys     0m2.490s

bench: utime=27.391s
bench: utime=27.103s
bench: utime=27.199s
bench: utime=27.262s
bench: utime=27.435s
bench: utime=27.236s
bench: utime=27.312s
bench: utime=27.042s
bench: utime=27.127s
bench: utime=27.204s

real    4m34.983s
user    4m32.403s
sys     0m2.541s

bench: utime=28.886s
bench: utime=29.079s
bench: utime=29.128s
bench: utime=29.020s
bench: utime=28.906s
bench: utime=28.941s
bench: utime=29.102s
bench: utime=29.559s
bench: utime=28.999s
bench: utime=29.599s

real    4m54.070s
user    4m51.314s
sys     0m2.715s

bench: utime=28.640s
bench: utime=28.692s
bench: utime=28.825s
bench: utime=28.803s
bench: utime=28.710s
bench: utime=28.635s
bench: utime=28.729s
bench: utime=28.653s
bench: utime=28.583s
bench: utime=29.098s

real    4m49.949s
user    4m47.455s
sys     0m2.449s

So it seems that there is a speed gain.

So, I have condensed the three code patches in one, and added a new 
patch. These are to be considered substitution of my previous 
non-cosmetics patches.

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