public unsafe static int ov_openFile(VFile f, OggVorbis_File vf)
{
vf.memset();
ov_callbacks callbacks;
callbacks.read_func = Marshal.GetFunctionPointerForDelegate <ov_callbacks.ReadFuncDelegate>(FS_ReadOGG);
callbacks.seek_func = Marshal.GetFunctionPointerForDelegate <ov_callbacks.SeekFuncDelegate>(FS_SeekOGG);
callbacks.close_func = Marshal.GetFunctionPointerForDelegate <ov_callbacks.CloseFuncDelegate>(FS_CloseOGG);
callbacks.tell_func = Marshal.GetFunctionPointerForDelegate <ov_callbacks.TellFuncDelegate>(FS_TellOGG);
return(ov_open_callbacks(f, vf, null, -1, callbacks));
}
unsafe int OpenOGG(string strFileName, out WaveformatEx pwfx)
{
pwfx = default;
mhmmio = fileSystem.OpenFileRead(strFileName);
if (mhmmio == null)
{
return(-1);
}
ISystem.EnterCriticalSection(CRITICAL_SECTION.SECTION_ONE);
var ov = new OggVorbis_File();
if (OggVorbis.ov_openFile(mhmmio, ov) < 0)
{
ISystem.LeaveCriticalSection(CRITICAL_SECTION.SECTION_ONE); fileSystem.CloseFile(mhmmio); mhmmio = null; return(-1);
}
mfileTime = mhmmio.Timestamp;
var vi = ov_info(ov, -1);
mpwfx.Format.nSamplesPerSec = (int)vi->rate;
mpwfx.Format.nChannels = (short)vi->channels;
mpwfx.Format.wBitsPerSample = sizeof(short) * 8;
mdwSize = (int)(ov_pcm_total(ov, -1) * vi->channels); // pcm samples * num channels
mbIsReadingFromMemory = false;
if (SoundSystemLocal.s_realTimeDecoding.Bool)
{
ov_clear(ov);
fileSystem.CloseFile(mhmmio);
mhmmio = null;
mpwfx.Format.wFormatTag = WAVE_FORMAT_TAG.OGG;
mhmmio = fileSystem.OpenFileRead(strFileName);
mMemSize = mhmmio.Length;
}
else
{
ogg = ov;
mpwfx.Format.wFormatTag = WAVE_FORMAT_TAG.PCM;
mMemSize = mdwSize * sizeof(short);
}
pwfx = mpwfx.Format;
ISystem.LeaveCriticalSection(CRITICAL_SECTION.SECTION_ONE);
isOgg = true;
return(0);
}
/// <summary>
/// Reads the audio data in the oggvorbis stream.
/// TODO: Read from stream instead of temp file.
/// </summary>
/// <returns>Raw Audio Buffer</returns>
public override AudioData ReadAudioData()
{
ALFormat format = 0;
int frequency = 0;
AudioData data;
using (MemoryStream mStream = new MemoryStream())
{
vorbis_info info;
OggVorbis_File file = new OggVorbis_File();
int bitstream = 0;
long bytes;
byte[] array = new byte[32768];
string filePath = CreateTempSoundFile();
NativeMethods.ov_fopen(filePath, ref file);
info = (vorbis_info)Marshal.PtrToStructure(NativeMethods.ov_info(ref file, -1), typeof(vorbis_info));
if (info.channels == 1)
{
format = ALFormat.Mono16;
}
else
{
format = ALFormat.Stereo16;
}
frequency = info.rate;
do
{
bytes = NativeMethods.ov_read(ref file, array, array.Length, 0, 2, 1, ref bitstream);
mStream.Write(array, 0, (int)bytes);
} while (bytes > 0);
NativeMethods.ov_clear(ref file);
File.Delete(filePath);
data = new AudioData(mStream.ToArray(), format, frequency);
}
return(data);
}
