87 lines
1.5 KiB
Go
87 lines
1.5 KiB
Go
package main
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import (
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"bufio"
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"bytes"
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"fmt"
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"go/format"
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"log"
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"os"
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"os/exec"
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"strings"
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)
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func must(err error) {
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if err == nil {
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return
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}
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log.Fatal(err)
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}
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func main() {
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cmd := exec.Command("ffmpeg", "-muxers")
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outputBytes, err := cmd.Output()
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must(err)
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code := `package formats
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var (
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`
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bufreader := bufio.NewScanner(bytes.NewReader(outputBytes))
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/*File formats:
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D. = Demuxing supported
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.E = Muxing supported
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--
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E 3g2 3GP2 (3GPP2 file format)
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E 3gp 3GP (3GPP file format)*/
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waitingForList := true
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for bufreader.Scan() && waitingForList {
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text := bufreader.Text()
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if text == " --" {
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waitingForList = false
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}
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}
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for bufreader.Scan() {
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text := bufreader.Text()
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demuxingSupported := text[1] == 'D'
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muxingSupported := text[2] == 'E'
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text = text[4:]
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cols := strings.Fields(text)
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ids := strings.Split(cols[0], ",")
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name := strings.Join(cols[1:], " ")
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for _, id := range ids {
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code += fmt.Sprintf(`
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// %s
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Format_%s = %q
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`, name, strings.ToUpper(id), id)
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if demuxingSupported {
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code += fmt.Sprintf(` // %s
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Demux_Format_%s = Format_%s
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`, name, strings.ToUpper(id), strings.ToUpper(id))
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}
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if muxingSupported {
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code += fmt.Sprintf(` // %s
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Mux_Format_%s = Format_%s
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`, name, strings.ToUpper(id), strings.ToUpper(id))
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}
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}
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}
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code += `
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)
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`
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codeBytes, err := format.Source([]byte(code))
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must(err)
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f, err := os.Create("gen_formats.go")
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must(err)
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defer f.Close()
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_, err = f.Write(codeBytes)
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must(err)
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}
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