// SND_PaintChannelFrom8
static void PaintChannelFrom8(channel_t ch, sfxcache_t sc, int count)
{
if (ch.leftvol > 255)
{
ch.leftvol = 255;
}
if (ch.rightvol > 255)
{
ch.rightvol = 255;
}
int lscale = ch.leftvol >> 3;
int rscale = ch.rightvol >> 3;
byte[] sfx = sc.data;
int offset = ch.pos;
for (int i = 0; i < count; i++)
{
int data = sfx[offset + i];
_PaintBuffer[i].left += _ScaleTable[lscale, data];
_PaintBuffer[i].right += _ScaleTable[rscale, data];
}
ch.pos += count;
}
// S_SoundList
static void SoundList()
{
int total = 0;
for (int i = 0; i < _NumSfx; i++)
{
sfx_t sfx = _KnownSfx[i];
sfxcache_t sc = (sfxcache_t)Cache.Check(sfx.cache);
if (sc == null)
{
continue;
}
int size = sc.length * sc.width * (sc.stereo + 1);
total += size;
if (sc.loopstart >= 0)
{
Con.Print("L");
}
else
{
Con.Print(" ");
}
Con.Print("({0:d2}b) {1:g6} : {2}\n", sc.width * 8, size, sfx.name);
}
Con.Print("Total resident: {0}\n", total);
}
// S_LoadSound
static sfxcache_t LoadSound(sfx_t s)
{
// see if still in memory
sfxcache_t sc = (sfxcache_t)Cache.Check(s.cache);
if (sc != null)
{
return(sc);
}
// load it in
string namebuffer = "sound/" + s.name;
byte[] data = Common.LoadFile(namebuffer);
if (data == null)
{
Con.Print("Couldn't load {0}\n", namebuffer);
return(null);
}
wavinfo_t info = GetWavInfo(s.name, data);
if (info.channels != 1)
{
Con.Print("{0} is a stereo sample\n", s.name);
return(null);
}
float stepscale = info.rate / (float)_shm.speed;
int len = (int)(info.samples / stepscale);
len *= info.width * info.channels;
s.cache = Cache.Alloc(len, s.name);
if (s.cache == null)
{
return(null);
}
sc = new sfxcache_t();
sc.length = info.samples;
sc.loopstart = info.loopstart;
sc.speed = info.rate;
sc.width = info.width;
sc.stereo = info.channels;
s.cache.data = sc;
ResampleSfx(s, sc.speed, sc.width, new ByteArraySegment(data, info.dataofs));
return(sc);
}
// SND_PaintChannelFrom16
static void PaintChannelFrom16(channel_t ch, sfxcache_t sc, int count)
{
int leftvol = ch.leftvol;
int rightvol = ch.rightvol;
byte[] sfx = sc.data;
int offset = ch.pos * 2; // sfx = (signed short *)sc->data + ch->pos;
for (int i = 0; i < count; i++)
{
int data = (short)((ushort)sfx[offset] + ((ushort)sfx[offset + 1] << 8)); // Uze: check is this is right!!!
int left = (data * leftvol) >> 8;
int right = (data * rightvol) >> 8;
_PaintBuffer[i].left += left;
_PaintBuffer[i].right += right;
offset += 2;
}
ch.pos += count;
}
// S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation)
public static void StaticSound(sfx_t sfx, ref Vector3 origin, float vol, float attenuation)
{
if (sfx == null)
{
return;
}
if (_TotalChannels == MAX_CHANNELS)
{
Con.Print("total_channels == MAX_CHANNELS\n");
return;
}
channel_t ss = _Channels[_TotalChannels];
_TotalChannels++;
sfxcache_t sc = LoadSound(sfx);
if (sc == null)
{
return;
}
if (sc.loopstart == -1)
{
Con.Print("Sound {0} not looped\n", sfx.name);
return;
}
ss.sfx = sfx;
ss.origin = origin;
ss.master_vol = (int)vol;
ss.dist_mult = (attenuation / 64) / _SoundNominalClipDist;
ss.end = _PaintedTime + sc.length;
Spatialize(ss);
}
// S_PaintChannels
static void PaintChannels(int endtime)
{
while (_PaintedTime < endtime)
{
// if paintbuffer is smaller than DMA buffer
int end = endtime;
if (endtime - _PaintedTime > PAINTBUFFER_SIZE)
{
end = _PaintedTime + PAINTBUFFER_SIZE;
}
// clear the paint buffer
Array.Clear(_PaintBuffer, 0, end - _PaintedTime);
// paint in the channels.
for (int i = 0; i < _TotalChannels; i++)
{
channel_t ch = _Channels[i];
if (ch.sfx == null)
{
continue;
}
if (ch.leftvol == 0 && ch.rightvol == 0)
{
continue;
}
sfxcache_t sc = LoadSound(ch.sfx);
if (sc == null)
{
continue;
}
int count, ltime = _PaintedTime;
while (ltime < end)
{
// paint up to end
if (ch.end < end)
{
count = ch.end - ltime;
}
else
{
count = end - ltime;
}
if (count > 0)
{
if (sc.width == 1)
{
PaintChannelFrom8(ch, sc, count);
}
else
{
PaintChannelFrom16(ch, sc, count);
}
ltime += count;
}
// if at end of loop, restart
if (ltime >= ch.end)
{
if (sc.loopstart >= 0)
{
ch.pos = sc.loopstart;
ch.end = ltime + sc.length - ch.pos;
}
else
{ // channel just stopped
ch.sfx = null;
break;
}
}
}
}
// transfer out according to DMA format
TransferPaintBuffer(end);
_PaintedTime = end;
}
}
// ResampleSfx
static void ResampleSfx(sfx_t sfx, int inrate, int inwidth, ByteArraySegment data)
{
sfxcache_t sc = (sfxcache_t)Cache.Check(sfx.cache);
if (sc == null)
{
return;
}
float stepscale = (float)inrate / _shm.speed; // this is usually 0.5, 1, or 2
int outcount = (int)(sc.length / stepscale);
sc.length = outcount;
if (sc.loopstart != -1)
{
sc.loopstart = (int)(sc.loopstart / stepscale);
}
sc.speed = _shm.speed;
if (_LoadAs8bit.Value != 0)
{
sc.width = 1;
}
else
{
sc.width = inwidth;
}
sc.stereo = 0;
sc.data = new byte[outcount * sc.width]; // uze: check this later!!!
// resample / decimate to the current source rate
byte[] src = data.Data;
if (stepscale == 1 && inwidth == 1 && sc.width == 1)
{
// fast special case
for (int i = 0; i < outcount; i++)
{
int v = src[data.StartIndex + i] - 128;
sc.data[i] = (byte)((sbyte)v); //((signed char *)sc.data)[i] = (int)( (unsigned char)(data[i]) - 128);
}
}
else
{
// general case
int samplefrac = 0;
int fracstep = (int)(stepscale * 256);
int sample;
short[] sa = new short[1];
for (int i = 0; i < outcount; i++)
{
int srcsample = samplefrac >> 8;
samplefrac += fracstep;
if (inwidth == 2)
{
Buffer.BlockCopy(src, data.StartIndex + srcsample * 2, sa, 0, 2);
sample = Common.LittleShort(sa[0]);// ((short *)data)[srcsample] );
}
else
{
sample = (int)(src[data.StartIndex + srcsample] - 128) << 8;
//sample = (int)( (unsigned char)(data[srcsample]) - 128) << 8;
}
if (sc.width == 2)
{
sa[0] = (short)sample;
Buffer.BlockCopy(sa, 0, sc.data, i * 2, 2); //((short *)sc->data)[i] = sample;
}
else
{
sc.data[i] = (byte)(sbyte)(sample >> 8); //((signed char *)sc->data)[i] = sample >> 8;
}
}
}
}
// S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation)
public static void StartSound(int entnum, int entchannel, sfx_t sfx, ref Vector3 origin, float fvol, float attenuation)
{
if (!_SoundStarted || sfx == null)
{
return;
}
if (_NoSound.Value != 0)
{
return;
}
int vol = (int)(fvol * 255);
// pick a channel to play on
channel_t target_chan = PickChannel(entnum, entchannel);
if (target_chan == null)
{
return;
}
// spatialize
//memset (target_chan, 0, sizeof(*target_chan));
target_chan.origin = origin;
target_chan.dist_mult = attenuation / _SoundNominalClipDist;
target_chan.master_vol = vol;
target_chan.entnum = entnum;
target_chan.entchannel = entchannel;
Spatialize(target_chan);
if (target_chan.leftvol == 0 && target_chan.rightvol == 0)
{
return; // not audible at all
}
// new channel
sfxcache_t sc = LoadSound(sfx);
if (sc == null)
{
target_chan.sfx = null;
return; // couldn't load the sound's data
}
target_chan.sfx = sfx;
target_chan.pos = 0;
target_chan.end = _PaintedTime + sc.length;
// if an identical sound has also been started this frame, offset the pos
// a bit to keep it from just making the first one louder
for (int i = Ambients.NUM_AMBIENTS; i < Ambients.NUM_AMBIENTS + MAX_DYNAMIC_CHANNELS; i++)
{
channel_t check = _Channels[i];
if (check == target_chan)
{
continue;
}
if (check.sfx == sfx && check.pos == 0)
{
int skip = Sys.Random((int)(0.1 * _shm.speed));// rand() % (int)(0.1 * shm->speed);
if (skip >= target_chan.end)
{
skip = target_chan.end - 1;
}
target_chan.pos += skip;
target_chan.end -= skip;
break;
}
}
}