/
output.go
59 lines (48 loc) · 1.19 KB
/
output.go
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package main
import (
"fmt"
"io"
"os"
"github.com/hajimehoshi/go-mp3"
"github.com/hajimehoshi/oto"
)
// Default stdout for testing purposes
type stdOut struct{}
func (so stdOut) Write(p []byte) (n int, err error) {
adhanType := string(p)
fmt.Println(adhanType)
return len(p), nil
}
// mp3Player is primarily used to implement interface output mp3 to audio output device
type mp3Player struct{}
// Write outputs the reads the mp3 adhan file (passed in as filename) and outputs mp3 to audio device using `oto` and `go-mp3`
func (mp mp3Player) Write(p []byte) (n int, err error) {
var filename string
switch string(p) {
case "Fajr":
filename = "mp3/adhan-fajr.mp3"
default:
filename = "mp3/adhan-turkish.mp3"
}
adhanF, err := os.Open(filename)
if err != nil {
return 0, err
}
defer adhanF.Close()
decoder, err := mp3.NewDecoder(adhanF)
if err != nil {
return 0, err
}
c, err := oto.NewContext(decoder.SampleRate(), 2, 2, 8192)
if err != nil {
return 0, err
}
defer c.Close()
player := c.NewPlayer()
defer player.Close()
fmt.Printf("playing bytes: %d[bytes]\n", decoder.Length())
if _, err := io.Copy(player, decoder); err != nil {
return 0, err
}
return len(p), nil
}