77 lines
1.6 KiB
Go
77 lines
1.6 KiB
Go
package generator
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"segmenta/pkg/handler"
|
|
"sync"
|
|
)
|
|
|
|
const AppName = "segmenta"
|
|
const DefaultPlaylistFilename = "playlist.m3u8"
|
|
|
|
// Generator generates assets for a given stream. The default implementation
|
|
// segments using FFMPEG.
|
|
type FFMPEGGenerator struct {
|
|
name string
|
|
src io.Reader
|
|
handlers map[handler.Handler]bool
|
|
}
|
|
|
|
func NewFFMPEGGenerator(name string, src io.Reader) *FFMPEGGenerator {
|
|
return &FFMPEGGenerator{
|
|
name: name,
|
|
src: src,
|
|
handlers: make(map[handler.Handler]bool),
|
|
}
|
|
}
|
|
|
|
func (g *FFMPEGGenerator) Generate() error {
|
|
// first, create a temporary directory.
|
|
prefix := fmt.Sprintf("%s-%s", AppName, g.name)
|
|
tmpdir, err := ioutil.TempDir("", prefix)
|
|
if err != nil {
|
|
return fmt.Errorf("ffmpeg: error initializing TempDir: %v", tmpdir)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
|
|
playlist := filepath.Join(tmpdir, DefaultPlaylistFilename)
|
|
|
|
var wg sync.WaitGroup
|
|
|
|
go g.doFFMPEG(&wg, playlist)
|
|
|
|
wg.Add(1)
|
|
wg.Wait()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (g *FFMPEGGenerator) AddHandler(h handler.Handler) {
|
|
g.handlers[h] = true
|
|
}
|
|
|
|
func (g *FFMPEGGenerator) RemoveHandler(h handler.Handler) {
|
|
delete(g.handlers, h)
|
|
}
|
|
|
|
// TODO should wg be passed in a Context?
|
|
func (g *FFMPEGGenerator) doFFMPEG(wg *sync.WaitGroup, dest string) {
|
|
defer wg.Done()
|
|
|
|
cmd := exec.Command("ffmpeg", "-re", "-i", "-", "-f", "hls", "-t", "10", dest)
|
|
cmd.Stdin = g.src
|
|
|
|
if err := cmd.Run(); err != nil {
|
|
// TODO: error handling
|
|
log.Fatalf("ffmpeg: error running cmd: %v", err)
|
|
}
|
|
|
|
fmt.Println("ffmpeg: exited")
|
|
}
|