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[performance] ffmpeg ffprobe wrapper improvements (#3225)

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* use a single instance of wazero runtime and compiled modules

* remove test output 🤦

* undo process-{media,emoji} changes

* update test runner to include wazero compilation cache

* sign drone.yml

---------

Co-authored-by: tobi <tobi.smethurst@protonmail.com>
This commit is contained in:
kim 2024-08-23 15:15:35 +00:00 • committed by GitHub
commit 8e5a72ac5c
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10 changed files with 301 additions and 384 deletions
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67
internal/media/ffmpeg/ffprobe.go
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@ -19,65 +19,22 @@ package ffmpeg
import (
"context"
ffprobelib "codeberg.org/gruf/go-ffmpreg/embed/ffprobe"
"codeberg.org/gruf/go-ffmpreg/wasm"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
)
// InitFfprobe initializes the ffprobe WebAssembly instance pool,
// with given maximum limiting the number of concurrent instances.
// ffprobeRunner limits the number of
// ffprobe WebAssembly instances that
// may be concurrently running, in
// order to reduce memory usage.
var ffprobeRunner runner
// InitFfprobe precompiles the ffprobe WebAssembly source into memory and
// prepares the runner to only allow max given concurrent running instances.
func InitFfprobe(ctx context.Context, max int) error {
initCache() // ensure compilation cache initialized
return ffprobePool.Init(ctx, max)
ffprobeRunner.Init(max)
return compileFfprobe(ctx)
}
// Ffprobe runs the given arguments with an instance of ffprobe.
func Ffprobe(ctx context.Context, args wasm.Args) (uint32, error) {
return ffprobePool.Run(ctx, args)
}
var ffprobePool = wasmInstancePool{
inst: wasm.Instantiator{
// WASM module name.
Module: "ffprobe",
// Per-instance WebAssembly runtime (with shared cache).
Runtime: func(ctx context.Context) wazero.Runtime {
// Prepare config with cache.
cfg := wazero.NewRuntimeConfig()
cfg = cfg.WithCoreFeatures(ffprobelib.CoreFeatures)
cfg = cfg.WithCompilationCache(cache)
// Instantiate runtime with our config.
rt := wazero.NewRuntimeWithConfig(ctx, cfg)
// Prepare default "env" host module.
env := rt.NewHostModuleBuilder("env")
// Instantiate "env" module in our runtime.
_, err := env.Instantiate(context.Background())
if err != nil {
panic(err)
}
// Instantiate the wasi snapshot preview 1 in runtime.
_, err = wasi_snapshot_preview1.Instantiate(ctx, rt)
if err != nil {
panic(err)
}
return rt
},
// Per-run module configuration.
Config: wazero.NewModuleConfig,
// Embedded WASM.
Source: ffprobelib.B,
},
func Ffprobe(ctx context.Context, args Args) (uint32, error) {
return ffprobeRunner.Run(ctx, ffprobe, args)
}