// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package ffmpeg

import (
	"os"

	"github.com/tetratelabs/wazero"
)

// shared WASM compilation cache.
var cache wazero.CompilationCache

func initCache() {
	if cache != nil {
		return
	}

	if dir := os.Getenv("WAZERO_COMPILATION_CACHE"); dir != "" {
		var err error

		// Use on-filesystem compilation cache given by env.
		cache, err = wazero.NewCompilationCacheWithDir(dir)
		if err != nil {
			panic(err)
		}
	} else {
		// Use in-memory compilation cache.
		cache = wazero.NewCompilationCache()
	}
}