Activity

1. dreampiggy commented on Oct 14, 2022

   

   dreampiggy

   on Oct 14, 2022

   Last edited by dreampiggy

   Collaborator

   More actions

   See: #7

   Actually, before v0.5.0 (which is originally written by me), it use avifImageYUVToRGB to convert it, exactly what you think. And code is simple.

   But @ledyba-z create that PR and use vImage for conversion and provide the performance result, so I merge it and release the new version.

   And then, since @ledyba-z no longer maintain this repo and write his own AVIF decoder (!), so I maintained this code and get updated to libavif's API break, until now 😂
2. dreampiggy commented on Oct 14, 2022

   

   dreampiggy

   on Oct 14, 2022

   Last edited by dreampiggy

   Collaborator

   More actions

   Currently YUV<->RGB may loss detail and slow if you just use CPU to do conversion.

   There are two available open source project used by libavif for RGB to YUV conversion, one is libyuv, another is sharpyuv (Both from Google), or use Apple's vImage to convert.
3. dreampiggy

   added

   questionFurther information is requestedFurther information is requested

   on Oct 14, 2022
4. dreampiggy commented on Oct 14, 2022

   

   dreampiggy

   on Oct 14, 2022

   Last edited by dreampiggy

   Collaborator

   More actions

   If you think there are performance regression, I can provide a option in AVIFCoder to let you customize, like :

   typedef enum RGBYUVConversion {
       case vImage,
       case libyuv,
       case sharpyuv
   } RGBYUVConversion;
   
   @interface SDImageAVIFCoder
   // Control the default RGB to YUV conversion, defaults to vImage (which is fast on Apple platforms)
   @class (assign) BOOL RGBYUVConversion defaultConversion; 
   @end
   

   👀React with 👀1Reacted by DreamPiggy
6. ledyba-z commented on Oct 17, 2022

   

   ledyba-z

   on Oct 17, 2022

   Last edited by ledyba-z

   Collaborator

   More actions

   Ah, yes. vImage frameworks can convert YUV to RGB about 100x faster than naive CPU code.

   @dreampiggy Hi, I have quit my job on link-u, which is a manga company, and moved to a energy company.
   But I am still interested in maintaining, so feel free to mention when something happen to vImage codes!

   👍React with 👍3Reacted by DreamPiggy, Lakr and Ysy

   🎉React with 🎉2Reacted by DreamPiggy and zhhz