示例#1
0
func Main(ctx sound.Context, channels ...chan float64) {
	flag.Parse()
	runtime.GOMAXPROCS(NumThreads)

	// Make a copy of the argument array before we modify it.
	channels2 := make([]chan float64, len(channels))
	copy(channels2, channels)
	channels = channels2

	// Measure the duration of the first channel
	var durationStream chan float64
	channels[0], durationStream = ctx.Fork2(channels[0])
	durationChan := make(chan time.Duration, 1)
	go func() {
		durationChan <- ctx.Duration(durationStream)
	}()

	so := getOutput(ctx)

	// Write the output
	startTime := time.Now()
	err := so.Write(ctx.SampleRate, channels)
	endTime := time.Now()

	if err != nil {
		fmt.Printf("Error: %s\n", err.Error())
	}

	outSecs := float64(<-durationChan) / float64(time.Second)
	realSecs := float64(endTime.Sub(startTime)) / float64(time.Second)
	fmt.Printf("Generated %.3f seconds of audio in %.3f seconds (ratio %.3f).\n", outSecs, realSecs, outSecs/realSecs)
}