OggVorbis_File ogg; // OggVorbis file
public unsafe virtual void Decode(SoundSample sample, int sampleOffset44k, int sampleCount44k, float *dest)
{
if (sample.objectInfo.wFormatTag != lastFormat || sample != lastSample)
{
ClearDecoder();
}
lastDecodeTime = soundSystemLocal.CurrentSoundTime;
if (failed)
{
UnsafeX.InitBlock(dest, 0, sampleCount44k * sizeof(float)); return;
}
// samples can be decoded both from the sound thread and the main thread for shakes
ISystem.EnterCriticalSection(CRITICAL_SECTION.SECTION_ONE);
var readSamples44k = sample.objectInfo.wFormatTag switch
{
WAVE_FORMAT_TAG.PCM => DecodePCM(sample, sampleOffset44k, sampleCount44k, dest),
WAVE_FORMAT_TAG.OGG => DecodeOGG(sample, sampleOffset44k, sampleCount44k, dest),
_ => 0,
};
ISystem.LeaveCriticalSection(CRITICAL_SECTION.SECTION_ONE);
if (readSamples44k < sampleCount44k)
{
UnsafeX.InitBlock(dest + readSamples44k, 0, (sampleCount44k - readSamples44k) * sizeof(float));
}
}
// Will always return 44kHz samples for the given range, even if it deeply looped or out of the range of the unlooped samples. Handles looping between multiple different
// samples and leadins
public unsafe void GatherChannelSamples(int sampleOffset44k, int sampleCount44k, float *dest)
{
int len;
//Sys_DebugPrintf( "msec:%i sample:%i : %i : %i\n", Sys_Milliseconds(), soundSystemLocal.GetCurrent44kHzTime(), sampleOffset44k, sampleCount44k ); //!@#
var destF = dest;
{
var dest_p = destF;
// negative offset times will just zero fill
if (sampleOffset44k < 0)
{
len = -sampleOffset44k;
if (len > sampleCount44k)
{
len = sampleCount44k;
}
UnsafeX.InitBlock(dest_p, 0, len * sizeof(float));
dest_p += len;
sampleCount44k -= len;
sampleOffset44k += len;
}
// grab part of the leadin sample
var leadin = leadinSample;
if (leadin == null || sampleOffset44k < 0 || sampleCount44k <= 0)
{
UnsafeX.InitBlock(dest_p, 0, sampleCount44k * sizeof(float)); return;
}
if (sampleOffset44k < leadin.LengthIn44kHzSamples)
{
len = leadin.LengthIn44kHzSamples - sampleOffset44k;
if (len > sampleCount44k)
{
len = sampleCount44k;
}
// decode the sample
decoder.Decode(leadin, sampleOffset44k, len, dest_p);
dest_p += len;
sampleCount44k -= len;
sampleOffset44k += len;
}
// if not looping, zero fill any remaining spots
if (soundShader == null || (parms.soundShaderFlags & ISoundSystem.SSF_LOOPING) == 0)
{
UnsafeX.InitBlock(dest_p, 0, sampleCount44k * sizeof(float)); return;
}
// fill the remainder with looped samples
var loop = soundShader.entries[0];
if (loop != null)
{
UnsafeX.InitBlock(dest_p, 0, sampleCount44k * sizeof(float)); return;
}
sampleOffset44k -= leadin.LengthIn44kHzSamples;
while (sampleCount44k > 0)
{
var totalLen = loop.LengthIn44kHzSamples;
sampleOffset44k %= totalLen;
len = totalLen - sampleOffset44k;
if (len > sampleCount44k)
{
len = sampleCount44k;
}
// decode the sample
decoder.Decode(loop, sampleOffset44k, len, dest_p);
dest_p += len;
sampleCount44k -= len;
sampleOffset44k += len;
}
}
}