吴璨
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
package app
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import (
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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)
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func normalizedFFmpegSetting(value string) string {
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value = strings.TrimSpace(value)
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if len(value) >= 2 && value[0] == '"' && value[len(value)-1] == '"' {
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value = strings.TrimSpace(value[1 : len(value)-1])
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}
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return value
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}
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func automaticFFmpeg(value string) bool {
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value = normalizedFFmpegSetting(value)
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if runtime.GOOS == "windows" {
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value = strings.ToLower(value)
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}
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return value == "" || value == "ffmpeg" || value == "ffmpeg.exe"
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}
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func ffmpegExecutableName() string {
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if runtime.GOOS == "windows" {
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return "ffmpeg.exe"
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}
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return "ffmpeg"
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}
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func ffmpegManagedDirectory() string {
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directory := filepath.Join("bin", runtime.GOOS+"-"+runtime.GOARCH, "verified-b6.1.1")
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if absolute, err := filepath.Abs(directory); err == nil {
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return absolute
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}
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return directory
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}
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func ffmpegCandidates(configured, managedDirectory string) []string {
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var candidates []string
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seen := make(map[string]bool)
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add := func(candidate string) {
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path, err := exec.LookPath(candidate)
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if err != nil {
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return
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}
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path, err = filepath.Abs(path)
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if err != nil {
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return
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}
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key := path
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if runtime.GOOS == "windows" {
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key = strings.ToLower(key)
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}
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if !seen[key] {
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seen[key] = true
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candidates = append(candidates, path)
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}
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}
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configured = normalizedFFmpegSetting(configured)
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if !automaticFFmpeg(configured) {
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add(configured)
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return candidates
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}
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name := ffmpegExecutableName()
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for _, directory := range filepath.SplitList(os.Getenv("PATH")) {
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if filepath.IsAbs(directory) {
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add(filepath.Join(directory, name))
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}
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}
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for _, path := range []string{filepath.Join("bin", name), name, filepath.Join(managedDirectory, name), filepath.Join("bin", runtime.GOOS+"-"+runtime.GOARCH, name)} {
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if absolute, err := filepath.Abs(path); err == nil {
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add(absolute)
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}
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}
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return candidates
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}
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