Exemplo n.º 1
0
Arquivo: mix.go Projeto: go-mix/mix
// SetFire to represent a single audio source playing at a specific time in the future (in time.Duration from play start), with sustain time.Duration, volume from 0 to 1, and pan from -1 to +1
func SetFire(source string, begin time.Duration, sustain time.Duration, volume float64, pan float64) *fire.Fire {
	mixPrepareSource(mixSourcePrefix + source)
	beginTz := spec.Tz(begin.Nanoseconds() / masterTzDur.Nanoseconds())
	var endTz spec.Tz
	if sustain != 0 {
		endTz = beginTz + spec.Tz(sustain.Nanoseconds()/masterTzDur.Nanoseconds())
	}
	f := fire.New(mixSourcePrefix+source, beginTz, endTz, volume, pan)
	mixReadyFires = append(mixReadyFires, f)
	return f
}
Exemplo n.º 2
0
func TestBase(t *testing.T) {
	testLengthTz := spec.Tz(100)
	src := "sound.wav"
	bgnTz := spec.Tz(5984)
	endTz := bgnTz + testLengthTz
	vol := float64(1)
	pan := float64(0)
	fire := New(src, bgnTz, endTz, vol, pan)
	// before start:
	assert.Equal(t, spec.Tz(0), fire.At(bgnTz-2))
	assert.Equal(t, spec.Tz(0), fire.At(bgnTz-1))
	assert.Equal(t, fireStateReady, fire.state)
	assert.Equal(t, true, fire.IsAlive())
	// start:
	assert.Equal(t, spec.Tz(0), fire.At(bgnTz))
	assert.Equal(t, fireStatePlay, fire.state)
	assert.Equal(t, true, fire.IsAlive())
	// after start / before end:
	for n := spec.Tz(1); n < testLengthTz; n++ {
		assert.Equal(t, spec.Tz(n), fire.At(bgnTz+n))
	}
	// end:
	assert.Equal(t, testLengthTz, fire.At(endTz))
	assert.Equal(t, fireStateDone, fire.state)
	assert.Equal(t, false, fire.IsAlive())
	// after end:
	assert.Equal(t, spec.Tz(0), fire.At(endTz+1))
}
Exemplo n.º 3
0
Arquivo: mix.go Projeto: go-mix/mix
// Configure the mixer frequency, format, channels & sample rate.
func Configure(s spec.AudioSpec) {
	masterSpec = &s
	masterFreq = float64(s.Freq)
	masterTzDur = time.Second / time.Duration(masterFreq)
	masterCycleDurTz = spec.Tz(masterFreq)
	source.Configure(s)
}
Exemplo n.º 4
0
Arquivo: mix.go Projeto: go-mix/mix
// OutputContinueTo to  mix and output as []byte via stdout, up to a specified duration-since-start
func OutputContinueTo(t time.Duration) {
	deltaDur := t - outputToDur
	deltaTz := spec.Tz(masterFreq * float64((deltaDur)/time.Second))
	debug.Printf("mix.OutputContinueTo(%+v) deltaDur:%+v nowTz:%+v deltaTz:%+v begin...", t, deltaDur, nowTz, deltaTz)
	bind.OutputNext(deltaTz)
	outputToDur = t
	debug.Printf("mix.OutputContinueTo(%+v) ...done! nowTz:%+v outputToDur:%+v", t, nowTz, outputToDur)
}
Exemplo n.º 5
0
func GetLength(src string) spec.Tz {
	source := Get(src)
	if source != nil {
		return source.Length()
	} else {
		return spec.Tz(0)
	}
}
Exemplo n.º 6
0
func testSourceAssertSound(t *testing.T, source *Source, channels int) (totalSoundMovement sample.Value) {
	for tz := spec.Tz(0); tz < source.Length(); tz++ {
		smp := source.SampleAt(tz, 1, 0)
		assert.Equal(t, channels, len(smp))
		for c := 0; c < channels; c++ {
			totalSoundMovement += smp[c].Abs()
		}
	}
	return
}
Exemplo n.º 7
0
Arquivo: source.go Projeto: go-mix/mix
func (s *Source) load() {
	s.state = LOADING
	s.sample, s.audioSpec = bind.LoadWAV(s.URL)
	if s.audioSpec == nil {
		// TODO: handle errors loading file
		debug.Printf("could not load WAV %s\n", s.URL)
	}
	s.maxTz = spec.Tz(len(s.sample))
	s.state = READY
}
Exemplo n.º 8
0
Arquivo: mix.go Projeto: go-mix/mix
// GetCycleDurationTz sets the duration of a mix cycle.
func SetCycleDuration(d time.Duration) {
	if masterFreq == 0 {
		panic("Must specify mixing frequency before setting cycle duration!")
	}
	masterCycleDurTz = spec.Tz((d / time.Second) * time.Duration(masterFreq))
}
Exemplo n.º 9
0
func TestSetGetMixCycleDuration(t *testing.T) {
	testAPISetup()
	SetMixCycleDuration(2 * time.Second)
	assert.Equal(t, spec.Tz(88200), mix.GetCycleDurationTz())
}
Exemplo n.º 10
0
Arquivo: writer.go Projeto: go-mix/mix
func OutputNext(numSamples spec.Tz) (err error) {
	for n := spec.Tz(0); n < numSamples; n++ {
		writer.Write(sample.OutNextBytes())
	}
	return
}