private void SetAudioFormat(libspotify.sp_audioformat format)
{
LogTo.Trace("STDP: SetAudioFormat()");
SetupBuffer(format);
_newFormat(_wave);
_init();
}
private int Session_OnAudioDataArrived(byte[] buffer, libspotify.sp_audioformat format)
{
if ((!_bufferset) || // Buffer hasn't been setup yet
(format.channels != _waveFormat.Channels) || (format.sample_rate != _waveFormat.SampleRate)) // New audio format
{
SetAudioFormat(format);
}
if (buffer.Length == 0)
{
_wave.ClearBuffer();
return(0);
}
// Try to keep buffer mostly full
//if (_wave.BufferedBytes < _wave.BufferLength - 40000) // 40000 samples = ~1s
// _jitter++;
if (buffer.Length > _wave.BufferLength - _wave.BufferedBytes)
{
return(0);
}
_wave.AddSamples(buffer, 0, buffer.Length);
return(buffer.Length);
}
private static int music_delivery(IntPtr sessionPtr, IntPtr formatPtr, IntPtr framesPtr, int num_frame)
{
// API 11 is firing this callback several times after the track ends. num_frame is set to 22050,
// which seems meaninful yet is way out of normal range (usually we get a couple hundred frames or less
// at a time). The buffers are all zeros, this adds a ton of extra silence to the end of the track for
// no reason. Docs don't talk about this new behavior, maybe related to gapless playback??
// Workaround by ignoring any data received after the end_of_track callback; this ignore is done
// in SpotifyTrackDataDataPipe.
if (num_frame == 0)
{
return(0);
}
libspotify.sp_audioformat format = (libspotify.sp_audioformat)Marshal.PtrToStructure(formatPtr, typeof(libspotify.sp_audioformat));
byte[] buffer = new byte[num_frame * sizeof(Int16) * format.channels];
Marshal.Copy(framesPtr, buffer, 0, buffer.Length);
if (Session.OnAudioDataArrived != null)
{
Session.OnAudioDataArrived(format, buffer, num_frame);
}
return(num_frame);
}
private static int music_delivery(IntPtr sessionPtr, IntPtr formatPtr, IntPtr framesPtr, int num_frame)
{
if (num_frame == 0)
{
return(0);
}
libspotify.sp_audioformat format = (libspotify.sp_audioformat)Marshal.PtrToStructure(formatPtr, typeof(libspotify.sp_audioformat));
byte[] buffer = new byte[num_frame * sizeof(Int16) * format.channels];
Marshal.Copy(framesPtr, buffer, 0, buffer.Length);
if (Session.OnAudioDataArrived != null)
{
Session.OnAudioDataArrived(buffer, format, num_frame);
}
if (soundBuffer == null)
{
SetupSoundOutput(format);
}
soundBuffer.AddSamples(buffer, 0, buffer.Length);
return(num_frame);
}
private static int MusicDeliveryCallback(IntPtr sessionPtr, IntPtr formatPtr, IntPtr framesPtr, int num_frames)
{
Session s = GetSession(sessionPtr);
if (s == null)
{
return(0);
}
byte[] samplesBytes = null;
libspotify.sp_audioformat format = (libspotify.sp_audioformat)Marshal.PtrToStructure(formatPtr, typeof(libspotify.sp_audioformat));
if (num_frames > 0)
{
samplesBytes = new byte[num_frames * format.channels * 2];
Marshal.Copy(framesPtr, samplesBytes, 0, samplesBytes.Length);
}
else
{
samplesBytes = new byte[0];
}
MusicDeliveryEventArgs e = new MusicDeliveryEventArgs(format.channels, format.sample_rate, samplesBytes, num_frames);
s.OnMusicDelivery(e);
return(e.ConsumedFrames);
}
private static void SetupSoundOutput(libspotify.sp_audioformat format)
{
const int bitsPerSample = 16;
int blockAlign = (format.channels * (bitsPerSample / 8));
int averageBytesPerSecond = format.sample_rate * blockAlign;
var waveFormat = WaveFormat.CreateCustomFormat(WaveFormatEncoding.Pcm, format.sample_rate, format.channels,
averageBytesPerSecond, blockAlign, bitsPerSample);
soundBuffer = new BufferedWaveProvider(waveFormat);
soundBuffer.BufferDuration = TimeSpan.FromSeconds(10);
waveOut.Init(soundBuffer);
}
private static void SetupBuffer(libspotify.sp_audioformat format)
{
LogTo.Trace("STDP: SetupBuffer()");
_bufferset = true;
if ((_wave != null) && (_waveFormat != null) && // Buffer is already setup
(format.channels == _waveFormat.Channels) && (format.sample_rate == _waveFormat.SampleRate)) // Format is the same
{
LogTo.Trace("Buffer already setup for this waveformat, clearing and continuing");
_wave.ClearBuffer();
return;
}
LogTo.Trace("Buffer not setup for this waveformat");
_waveFormat = new WaveFormat(format.sample_rate, 16, format.channels);
_wave = new BufferedWaveProvider(_waveFormat);
_wave.BufferDuration = TimeSpan.FromSeconds(10);
}
static void Session_OnAudioDataArrived(libspotify.sp_audioformat fmt, byte[] obj, int num_frame)
{
if (audioStreamComplete)
{
return;
}
if (num_frame == 22050 || num_frame > 44100 || num_frame == 0)
{
//This isn't normal. It's trying to write some kind of silence at the end of the file.
audioStreamComplete = true;
staticfmt = fmt;
FinishEncode();
return;
}
buf.Write(obj, 0, obj.Length);
if (frm != null)
{
frm.BeginInvoke((Delegate) new MethodInvoker(() => frm.SetStatus("Fetched " + buf.Length + " bytes")));
}
}
