internal Song(string fileName)
{
Vorbisfile.ov_fopen(fileName, out vorbisFile);
Vorbisfile.vorbis_info fileInfo = Vorbisfile.ov_info(
vorbisFile,
0
);
// TODO: ov_comment() -flibit
Name = Path.GetFileNameWithoutExtension(fileName);
TrackNumber = 0;
Duration = TimeSpan.FromSeconds(
Vorbisfile.ov_time_total(vorbisFile, 0)
);
soundStream = new DynamicSoundEffectInstance(
(int)fileInfo.rate,
(AudioChannels)fileInfo.channels
);
// FIXME: 60 is arbitrary for a 60Hz game -flibit
chunkSize = (int)(fileInfo.rate * fileInfo.channels / 60);
chunkStep = chunkSize / VisualizationData.Size;
IsDisposed = false;
}
internal Song(string fileName)
{
Vorbisfile.ov_fopen(fileName, out vorbisFile);
Vorbisfile.vorbis_info fileInfo = Vorbisfile.ov_info(
vorbisFile,
0
);
// Thanks sizeof(long) -flibit
int fileRate = (int)(fileInfo.rate.ToInt64() & 0xFFFFFFFF);
// TODO: ov_comment() -flibit
Name = Path.GetFileNameWithoutExtension(fileName);
TrackNumber = 0;
Duration = TimeSpan.FromSeconds(
Vorbisfile.ov_time_total(vorbisFile, 0)
);
soundStream = new DynamicSoundEffectInstance(
fileRate,
(AudioChannels)fileInfo.channels
);
// FIXME: I need this to bypass XNA's gain clamp... -flibit
soundStream.INTERNAL_isXACTSource = true;
// FIXME: 60 is arbitrary for a 60Hz game -flibit
chunkSize = (int)(fileRate * fileInfo.channels / 60);
chunkStep = chunkSize / VisualizationData.Size;
IsDisposed = false;
}
public static unsafe SoundEffect Decode(byte *start, byte *end)
{
FakeFile file = new FakeFile {
start = start, position = start, end = end
};
int sampleCount = *(int *)file.position; // <- We encoded this, before the packets start, because Vorbis doesn't know [not sure if this is still true for Ogg, haven't checked -AR]
file.position += 4;
int loopStart = *(int *)file.position;
file.position += 4;
int loopLength = *(int *)file.position;
file.position += 4;
// TODO: Consider modifying vorbisfile binding so we can stackalloc `vf`
IntPtr vf;
Vorbisfile.ov_open_callbacks((IntPtr)(&file), out vf, IntPtr.Zero, IntPtr.Zero, staticCallbacks);
Vorbisfile.vorbis_info info = Vorbisfile.ov_info(vf, 0);
byte[] audioData = new byte[sampleCount * info.channels * 2]; // *2 for 16-bit audio (as required by XNA)
fixed(byte *writeStart = audioData)
{
byte *writePosition = writeStart;
byte *writeEnd = writePosition + audioData.Length;
while (true)
{
int currentSection;
int result = (int)Vorbisfile.ov_read(vf, (IntPtr)writePosition, (int)(writeEnd - writePosition), 0, 2, 1, out currentSection);
if (result == 0) // End of file
{
break;
}
else if (result > 0)
{
writePosition += result;
}
if (writePosition >= writeEnd)
{
break;
}
}
Debug.Assert(writePosition == writeEnd); // <- If this fires, something went terribly wrong. (TODO: Throw exception?)
}
Vorbisfile.ov_clear(ref vf);
return(new SoundEffect(audioData, 0, audioData.Length, (int)info.rate, (AudioChannels)info.channels, loopStart, loopLength));
}
private void Initialize()
{
// The original method refers to long vorbis_info.rate, which has been changed to IntPtr in newer FNA releases.
Vorbisfile.vorbis_info vorbis_info = Vorbisfile.ov_info(vorbisFile, -1);
soundEffect = new DynamicSoundEffectInstance((int)vorbis_info.rate, (vorbis_info.channels == 1) ? AudioChannels.Mono : AudioChannels.Stereo);
Volume = 1f;
ToPrecache.Enqueue(this);
if (ThreadedPrecacher == null)
{
ThreadedPrecacher = new Thread(PrecacheStreams)
{
Priority = ThreadPriority.Lowest
};
ThreadedPrecacher.Start();
}
WakeUpPrecacher.Set();
}
internal Song(string fileName)
{
Vorbisfile.ov_fopen(fileName, out vorbisFile);
Vorbisfile.vorbis_info fileInfo = Vorbisfile.ov_info(
vorbisFile,
0
);
// TODO: ov_comment() -flibit
Name = Path.GetFileNameWithoutExtension(fileName);
TrackNumber = 0;
Duration = TimeSpan.FromSeconds(
Vorbisfile.ov_time_total(vorbisFile, 0)
);
soundStream = new DynamicSoundEffectInstance(
(int)fileInfo.rate,
(AudioChannels)fileInfo.channels
);
IsDisposed = false;
}
