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• aarch64 : hevc : Specialize put_hevc_\type\()_h*_8_neon for horizontal looping

  24 mars 2024, par Martin Storsjö

  aarch64 : hevc : Specialize put_hevc_\type\()_h*_8_neon for horizontal looping
  For widths of 32 pixels and more, loop first horizontally,
  
  then vertically.
  Previously, this function would process a 16 pixel wide slice
  
  of the block, looping vertically. After processing the whole
  
  height, it would backtrack and process the next 16 pixel wide
  
  slice.
  When doing 8tap filtering horizontally, the function must load
  
  7 more pixels (in practice, 8) following the actual inputs, and
  
  this was done for each slice.
  By iterating first horizontally throughout each line, then
  
  vertically, we access data in a more cache friendly order, and
  
  we don't need to reload data unnecessarily.
  Keep the original order in put_hevc_\type\()_h12_8_neon ; the
  
  only suboptimal case there is for width=24. But specializing
  
  an optimal variant for that would require more code, which
  
  might not be worth it.
  For the h16 case, this implementation would give a slowdown,
  
  as it now loads the first 8 pixels separately from the rest, but
  
  for larger widths, it is a gain. Therefore, keep the h16 case
  
  as it was (but remove the outer loop), and create a new specialized
  
  version for horizontal looping with 16 pixels at a time.
  Before :                  Cortex A53      A72      A73  Graviton 3
  
  put_hevc_qpel_h16_8_neon :     710.5    667.7    692.5   211.0
  
  put_hevc_qpel_h32_8_neon :    2791.5   2643.5   2732.0   883.5
  
  put_hevc_qpel_h64_8_neon :   10954.0  10657.0  10874.2  3241.5
  
  After :
  
  put_hevc_qpel_h16_8_neon :     697.5    663.5    705.7   212.5
  
  put_hevc_qpel_h32_8_neon :    2767.2   2684.5   2791.2   920.5
  
  put_hevc_qpel_h64_8_neon :   10559.2  10471.5  10932.2  3051.7
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavcodec/aarch64/hevcdsp_init_aarch64.c
  • [DH] libavcodec/aarch64/hevcdsp_qpel_neon.S

• avcodec/dxvenc, hap(dec|enc) : Move TextureDSPContext to stack

  24 janvier 2024, par Andreas Rheinhardt

  avcodec/dxvenc, hap(dec|enc) : Move TextureDSPContext to stack
  Only used during init.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/dxvenc.c
  • [DH] libavcodec/hap.h
  • [DH] libavcodec/hapdec.c
  • [DH] libavcodec/hapenc.c

• Error : Error : Cannot find module '@ffmpeg.wasm/core-mt' Require stack :

  30 septembre 2023, par James

  I'm getting this error "Error : Error : Cannot find module '@ffmpeg.wasm/core-mt', When my code is deployed on Vercel (Node.js + TypeScript) Does I get confused because when I try to run the same code on my local machine it works fine

  


  But as I deploy it on Vercel it gives that error. Obviously, i do have "@ffmpeg.wasm/core-mt" installed as said in the package https://github.com/FFmpeg-wasm/FFmpeg.wasm#installation So how do I fix it ?

  


  I'm currently using it like this

  


  import { FFmpeg } from "@ffmpeg.wasm/main";

async function myFunction() {
    const ffmpeg = await FFmpeg.create({
        core: "@ffmpeg.wasm/core-mt",
        log: true,
    });
}


  


  However, in the docs, i see doing like this

  


    import { FFmpeg } from "@ffmpeg.wasm/main";
    
     const ffmpeg = await FFmpeg.create({
            core: "@ffmpeg.wasm/core-mt",
            log: true,
        });

    async function myFunction() {
        // use ffmpeg here
    }


  


  But then i start getting errors like "top-level 'await' expressions are only allowed when the 'module' option is set to 'es2022', 'esnext', 'system', 'node16', or 'nodenext', and the 'target' option is set to 'es2017' or higher."

  


  I tried a couple of StackOverflow solutions but nothing works in my case. So what should I do ?

  


  tsconfig.json :

  


  {
    "compilerOptions": {
     "module": "CommonJS",
     "esModuleInterop": true,
      "allowSyntheticDefaultImports": true,
      "target": "es2017",
      "noImplicitAny": true,
      "moduleResolution": "node",
      "sourceMap": true,
      "outDir": "dist",
      "baseUrl": ".",
      "paths": {
        "*": ["node_modules/*", "src/types/*"]
      }
    },
    "include": ["./src/**/*", "src/firebase/serviceAccountKey.ts"]
  }