// Opens a wave file for reading
public int Open(string strFileName, out WaveformatEx pwfx)
{
pwfx = default;
mbIsReadingFromMemory = false;
mpbData = null;
mpbDataCur = 0;
if (strFileName == null)
{
return(-1);
}
var name = strFileName;
// note: used to only check for .wav when making a build
name = PathX.SetFileExtension(name, ".ogg");
if (fileSystem.ReadFile(name, out var _) != -1)
{
return(OpenOGG(name, out pwfx));
}
mpwfx = default;
mhmmio = fileSystem.OpenFileRead(strFileName);
if (mhmmio == null)
{
mdwSize = 0; return(-1);
}
if (mhmmio.Length <= 0)
{
mhmmio = null; return(-1);
}
if (ReadMMIO() != 0)
{
Close(); return(-1);
} // ReadMMIO will fail if its an not a wave file
mfileTime = mhmmio.Timestamp;
if (ResetFile() != 0)
{
Close(); return(-1);
}
// After the reset, the size of the wav file is mck.cksize so store it now
mdwSize = (int)(mck.cksize / sizeof(short));
mMemSize = (int)mck.cksize;
if (mck.cksize != 0xffffffff)
{
pwfx = mpwfx.Format; return(0);
}
return(-1);
}
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);
}