public void PlaySound(int samplingRate, byte[] pcmData)
{
if (previousAudioTrack != null)
{
previousAudioTrack.Stop();
previousAudioTrack.Release();
}
AudioTrack audioTrack = new AudioTrack(Stream.Music,
samplingRate,
ChannelOut.Mono,
Android.Media.Encoding.Pcm16bit,
pcmData.Length * sizeof(short),
AudioTrackMode.Static);
audioTrack.Write(pcmData, 0, pcmData.Length);
audioTrack.Play();
previousAudioTrack = audioTrack;
}
protected void PlayAudioTrack()
{
audioTrack = new AudioTrack (
// Stream type
Android.Media.Stream.Music,
// Frequency
11025,
// Mono or stereo
ChannelConfiguration.Mono,
// Audio encoding
Android.Media.Encoding.Pcm16bit,
// Length of the audio clip.
buffer.Length,
// Mode. Stream or static.
AudioTrackMode.Stream);
audioTrack.Play ();
audioTrack.Write (buffer, 0, buffer.Length);
}
protected Task PlayAudioTrackAsync()
{
return new Task(() => {
audioTrack = new AudioTrack (
// Stream type
Android.Media.Stream.Music,
// Frequency
44100,
// Mono or stereo
ChannelConfiguration.Mono,
// Audio encoding
Android.Media.Encoding.Pcm16bit,
// Length of the audio clip.
RecordAudio.fullAudioBuffer.Count,
// Mode. Stream or static.
AudioTrackMode.Stream);
audioTrack.Play ();
audioTrack.Write(RecordAudio.fullAudioBuffer.ToArray(), 0, RecordAudio.fullAudioBuffer.Count);
});
}
private void PlayMetronome()
{
const int amp = 10000;
double twopi = 8*Math.Atan(1.0);
const double fr = 440.0;
double ph = 0.0;
int lastBpm = metronCurrentBpm;
Animation anim = new AlphaAnimation(0.5f, 1.0f);
anim.Duration = (60000/metronCurrentBpm)/2;
anim.StartOffset = 0;
anim.RepeatMode = RepeatMode.Reverse;
anim.RepeatCount = Animation.Infinite;
RunOnUiThread(() => { metronBpmText.StartAnimation(anim); });
metronAudioTrack = new AudioTrack(Android.Media.Stream.Music, 44100, ChannelOut.Mono,
Encoding.Pcm16bit, metronBuffSize, AudioTrackMode.Stream);
metronAudioTrack.Play();
while (reading)
{
Thread.Sleep(60000/metronCurrentBpm);
if (lastBpm != metronCurrentBpm)
{
// The BPM has changed - change the animation speed!
lastBpm = metronCurrentBpm;
anim.Duration = (60000/metronCurrentBpm)/2;
RunOnUiThread(() =>
{
metronBpmText.ClearAnimation();
metronBpmText.StartAnimation(anim);
});
}
for (int i = 0; i < metronAudioBuffer.Length; i++)
{
metronAudioBuffer[i] = (short) (amp*Math.Sin(ph));
ph += twopi*fr/44100;
}
metronAudioTrack.Write(metronAudioBuffer, 0, metronAudioBuffer.Length);
}
metronAudioTrack.Stop();
metronAudioTrack.Release();
RunOnUiThread(() => { metronBpmText.ClearAnimation(); });
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate (bundle);
// Set our view from the "main" layout resource
SetContentView (Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button buttonRec = FindViewById<Button> (Resource.Id.myButton);
Button buttonPlay = FindViewById<Button> (Resource.Id.btnPlay);
ar = findAudioRecord ();
audioBuffer = new Int16[bufferSize];
//ar.Release ();
buttonRec.Click += delegate {
ar.StartRecording();
while (true) {
try
{
// Keep reading the buffer
//while there is audio input.
ar.Read(
audioBuffer,
0,
audioBuffer.Length);
if(count++ > audioBuffer.Length)
{
ar.Stop();
break;
}
// Write out the audio file.
}
catch (Exception ex)
{
Console.Out.WriteLine(ex.Message);
break;
}
}
};
buttonPlay.Click += (sender, e) =>
{
int minimumBufferSize = AudioTrack.GetMinBufferSize(ar.SampleRate, ChannelOut.Mono, Android.Media.Encoding.Pcm16bit);
audioTrack = new AudioTrack(
// Stream type
Android.Media.Stream.Music,
// Frequency
ar.SampleRate,
// Mono or stereo
ChannelConfiguration.Mono,
// Audio encoding
Android.Media.Encoding.Pcm16bit,
// Length of the audio clip.
(minimumBufferSize < audioBuffer.Length ? audioBuffer.Length : minimumBufferSize),
// Mode. Stream or static.
AudioTrackMode.Static);
audioTrack.Play();
audioTrack.Write(audioBuffer, 0, audioBuffer.Length);
};
}
void WriteValue(AudioTrack at, byte[] val, int times = 1)
{
for (int i = 0; i < times; i++)
at.Write(val, 0, val.Length);
}
private void Click_Play(object sender, EventArgs e)
{
if (_isPlaying)
{
_audioTrack.Stop();
_isPlaying = false;
_play.SetImageResource(Resource.Drawable.play);
return;
}
_play.SetImageResource(Resource.Drawable.stop);
var byteArr = _audioData.ToArray();
int sampleRate = 0;
Android.Media.Encoding audioFormat = Android.Media.Encoding.Pcm16bit;
ChannelOut channelConfig = ChannelOut.Stereo;
int bufferLength = 0;
_audioTrack = AudioHelper.FindAudioTrack(ref sampleRate, ref audioFormat, ref channelConfig, ref bufferLength);
_isPlaying = true;
(new TaskFactory()).StartNew(() =>
{
_audioTrack.Play();
_audioTrack.Write(byteArr, 0, byteArr.Length);
_activity.RunOnUiThread(() =>
{
_isPlaying = false;
_play.SetImageResource(Resource.Drawable.play);
});
});
}
