1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
// 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/>.
//go:build !nowasm
package ffmpeg
import (
"context"
"os"
ffmpeglib "codeberg.org/gruf/go-ffmpreg/embed/ffmpeg"
ffprobelib "codeberg.org/gruf/go-ffmpreg/embed/ffprobe"
"codeberg.org/gruf/go-ffmpreg/wasm"
"github.com/tetratelabs/wazero"
)
var (
// shared WASM runtime instance.
runtime wazero.Runtime
// ffmpeg / ffprobe compiled WASM.
ffmpeg wazero.CompiledModule
ffprobe wazero.CompiledModule
)
// compileFfmpeg ensures the ffmpeg WebAssembly has been
// pre-compiled into memory. If already compiled is a no-op.
func compileFfmpeg(ctx context.Context) error {
if ffmpeg != nil {
return nil
}
// Ensure runtime already initialized.
if err := initRuntime(ctx); err != nil {
return err
}
// Compile the ffmpeg WebAssembly module into memory.
cmod, err := runtime.CompileModule(ctx, ffmpeglib.B)
if err != nil {
return err
}
// Set module.
ffmpeg = cmod
return nil
}
// compileFfprobe ensures the ffprobe WebAssembly has been
// pre-compiled into memory. If already compiled is a no-op.
func compileFfprobe(ctx context.Context) error {
if ffprobe != nil {
return nil
}
// Ensure runtime already initialized.
if err := initRuntime(ctx); err != nil {
return err
}
// Compile the ffprobe WebAssembly module into memory.
cmod, err := runtime.CompileModule(ctx, ffprobelib.B)
if err != nil {
return err
}
// Set module.
ffprobe = cmod
return nil
}
// initRuntime initializes the global wazero.Runtime,
// if already initialized this function is a no-op.
func initRuntime(ctx context.Context) (err error) {
if runtime != nil {
return nil
}
// Create new runtime config.
cfg := wazero.NewRuntimeConfig()
if dir := os.Getenv("GTS_WAZERO_COMPILATION_CACHE"); dir != "" {
// Use on-filesystem compilation cache given by env.
cache, err := wazero.NewCompilationCacheWithDir(dir)
if err != nil {
return err
}
// Update runtime config with cache.
cfg = cfg.WithCompilationCache(cache)
}
// Initialize new runtime from config.
runtime, err = wasm.NewRuntime(ctx, cfg)
return
}
|
