[chore] pull in go-ffmpreg v0.4.1 (#3485)

* pull in go-ffmpreg v0.4.1

* bring back GTS_WAZERO_COMPILATION_CACHE

vendor/codeberg.org/gruf/go-ffmpreg/wasm/runtime.go

@@ -0,0 +1,67 @@
+package wasm
+
+import (
+	"context"
+
+	"github.com/tetratelabs/wazero"
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
+)
+
+// CoreFeatures are the WebAssembly Core specification
+// features our embedded binaries are compiled with.
+const CoreFeatures = api.CoreFeatureSIMD |
+	api.CoreFeatureBulkMemoryOperations |
+	api.CoreFeatureNonTrappingFloatToIntConversion |
+	api.CoreFeatureMutableGlobal |
+	api.CoreFeatureReferenceTypes |
+	api.CoreFeatureSignExtensionOps
+
+// NewRuntime returns a new WebAssembly wazero.Runtime compatible with go-ffmpreg.
+func NewRuntime(ctx context.Context, cfg wazero.RuntimeConfig) (wazero.Runtime, error) {
+	var err error
+
+	if cfg == nil {
+		// Ensure runtime config is set.
+		cfg = wazero.NewRuntimeConfig()
+	}
+
+	// Set core features ffmpeg compiled with.
+	cfg = cfg.WithCoreFeatures(CoreFeatures)
+
+	// Instantiate runtime with prepared config.
+	rt := wazero.NewRuntimeWithConfig(ctx, cfg)
+
+	// Prepare default "env" host module.
+	env := rt.NewHostModuleBuilder("env")
+
+	// Register setjmp host function.
+	env = env.NewFunctionBuilder().
+		WithGoModuleFunction(
+			api.GoModuleFunc(setjmp),
+			[]api.ValueType{api.ValueTypeI32},
+			[]api.ValueType{api.ValueTypeI32},
+		).Export("setjmp")
+
+	// Register longjmp host function.
+	env = env.NewFunctionBuilder().
+		WithGoModuleFunction(
+			api.GoModuleFunc(longjmp),
+			[]api.ValueType{api.ValueTypeI32, api.ValueTypeI32},
+			[]api.ValueType{},
+		).Export("longjmp")
+
+	// Instantiate "env" module.
+	_, err = env.Instantiate(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	// Instantiate the wasi snapshot preview 1 in runtime.
+	_, err = wasi_snapshot_preview1.Instantiate(ctx, rt)
+	if err != nil {
+		return nil, err
+	}
+
+	return rt, nil
+}