public void start()
{
if (running)
{
Logging.warn("Audio player is already running.");
return;
}
running = true;
AudioAttributes aa = new AudioAttributes.Builder()
.SetContentType(AudioContentType.Speech)
.SetLegacyStreamType(Stream.VoiceCall)
.SetFlags(AudioFlags.LowLatency)
.SetUsage(AudioUsageKind.VoiceCommunication)
.Build();
AudioFormat af = new AudioFormat.Builder()
.SetSampleRate(44100)
.SetChannelMask(ChannelOut.Mono)
.SetEncoding(Encoding.Pcm16bit)
.Build();
audioPlayer = new AudioTrack(aa, af, AudioTrack.GetMinBufferSize(44100, ChannelOut.Mono, Encoding.Pcm16bit) * 100, AudioTrackMode.Stream, 0);
audioPlayer.SetVolume(0.8f);
audioPlayer.Play();
}
private void initPlayer()
{
Encoding encoding = Encoding.Pcm16bit;
// Prepare player
AudioAttributes aa = new AudioAttributes.Builder()
.SetContentType(AudioContentType.Speech)
.SetLegacyStreamType(Stream.VoiceCall)
.SetFlags(AudioFlags.LowLatency)
.SetUsage(AudioUsageKind.VoiceCommunication)
.Build();
AudioFormat af = new AudioFormat.Builder()
.SetSampleRate(44100)
.SetChannelMask(ChannelOut.Mono)
.SetEncoding(encoding)
.Build();
bufferSize = AudioTrack.GetMinBufferSize(44100, ChannelOut.Mono, encoding) * 10;
audioPlayer = new AudioTrack(aa, af, bufferSize, AudioTrackMode.Stream, 0);
// TODO implement dynamic volume control
AudioManager am = (AudioManager)MainActivity.Instance.GetSystemService(Context.AudioService);
audioPlayer.SetVolume(am.GetStreamVolume(Stream.VoiceCall));
audioPlayer.Play();
}
