[performance] ffmpeg ffprobe wrapper improvements (#3225)

* 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>

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

@@ -1,129 +0,0 @@
-package wasm
-
-import (
-	"context"
-	"errors"
-	"io"
-
-	"github.com/tetratelabs/wazero"
-	"github.com/tetratelabs/wazero/sys"
-)
-
-type Args struct {
-	// Optional further module configuration function.
-	// (e.g. to mount filesystem dir, set env vars, etc).
-	Config func(wazero.ModuleConfig) wazero.ModuleConfig
-
-	// Standard FDs.
-	Stdin  io.Reader
-	Stdout io.Writer
-	Stderr io.Writer
-
-	// CLI args.
-	Args []string
-}
-
-type Instantiator struct {
-	// Module ...
-	Module string
-
-	// Runtime ...
-	Runtime func(context.Context) wazero.Runtime
-
-	// Config ...
-	Config func() wazero.ModuleConfig
-
-	// Source ...
-	Source []byte
-}
-
-func (inst *Instantiator) New(ctx context.Context) (*Instance, error) {
-	switch {
-	case inst.Module == "":
-		panic("missing module name")
-	case inst.Runtime == nil:
-		panic("missing runtime instantiator")
-	case inst.Config == nil:
-		panic("missing module configuration")
-	case len(inst.Source) == 0:
-		panic("missing module source")
-	}
-
-	// Create new host runtime.
-	rt := inst.Runtime(ctx)
-
-	// Compile guest module from WebAssembly source.
-	mod, err := rt.CompileModule(ctx, inst.Source)
-	if err != nil {
-		return nil, err
-	}
-
-	return &Instance{
-		inst: inst,
-		wzrt: rt,
-		cmod: mod,
-	}, nil
-}
-
-// Instance ...
-//
-// NOTE: Instance is NOT concurrency
-// safe. One at a time please!!
-type Instance struct {
-	inst *Instantiator
-	wzrt wazero.Runtime
-	cmod wazero.CompiledModule
-}
-
-func (inst *Instance) Run(ctx context.Context, args Args) (uint32, error) {
-	if inst.inst == nil {
-		panic("not initialized")
-	}
-
-	// Check instance open.
-	if inst.IsClosed() {
-		return 0, errors.New("instance closed")
-	}
-
-	// Prefix binary name as argv0 to args.
-	cargs := make([]string, len(args.Args)+1)
-	copy(cargs[1:], args.Args)
-	cargs[0] = inst.inst.Module
-
-	// Create base module config.
-	modcfg := inst.inst.Config()
-	modcfg = modcfg.WithName(inst.inst.Module)
-	modcfg = modcfg.WithArgs(cargs...)
-	modcfg = modcfg.WithStdin(args.Stdin)
-	modcfg = modcfg.WithStdout(args.Stdout)
-	modcfg = modcfg.WithStderr(args.Stderr)
-
-	if args.Config != nil {
-		// Pass through config fn.
-		modcfg = args.Config(modcfg)
-	}
-
-	// Instantiate the module from precompiled wasm module data.
-	mod, err := inst.wzrt.InstantiateModule(ctx, inst.cmod, modcfg)
-	switch err := err.(type) {
-	case nil:
-		return 0, mod.Close(ctx)
-	case *sys.ExitError:
-		return err.ExitCode(), nil
-	default:
-		return 0, err
-	}
-}
-
-func (inst *Instance) IsClosed() bool {
-	return (inst.wzrt == nil || inst.cmod == nil)
-}
-
-func (inst *Instance) Close(ctx context.Context) error {
-	if inst.IsClosed() {
-		return nil
-	}
-	err1 := inst.cmod.Close(ctx)
-	err2 := inst.wzrt.Close(ctx)
-	return errors.Join(err1, err2)
-}