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fteqw/engine/client/snd_mix.c
Spoike 1bb752b582 sdl2 support. 
hacky rendertarget stuff. not polished. don't use except for testing. feedback desired.
switched file system to use a qofs_t type instead. define FS_64BIT to make it 64bit (standard on 64bit cpus).
rewrote zip support, ditching unzip.c. this provided zip64 support, and unicode in zips.
changed local address enumeration to not be so stupid.
updated ode support a little to match some dp features.
changed fs_cache scheme, to not rebuild needlessly.

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4596 fc73d0e0-1445-4013-8a0c-d673dee63da5
2014-02-07 08:38:40 +00:00

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/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// snd_mix.c -- portable code to mix sounds for snd_dma.c
#include "quakedef.h"
#define PAINTBUFFER_SIZE 2048
float voicevolumemod = 1;
portable_samplegroup_t paintbuffer[PAINTBUFFER_SIZE];
int *snd_p, snd_vol;
short *snd_out;
void S_TransferPaintBuffer(soundcardinfo_t *sc, int endtime)
{
unsigned int out_idx;
unsigned int count;
unsigned int outlimit;
int *p;
int val;
// int snd_vol;
short *pbuf;
int i, numc;
p = (int *) paintbuffer;
count = (endtime - sc->paintedtime) * sc->sn.numchannels;
outlimit = sc->sn.samples;
out_idx = (sc->paintedtime * sc->sn.numchannels) % outlimit;
// snd_vol = (volume.value*voicevolumemod)*256;
numc = sc->sn.numchannels;
pbuf = sc->Lock(sc, &out_idx);
if (!pbuf)
return;
if (sc->sn.samplebits == 16)
{
short *out = (short *) pbuf;
while (count)
{
for (i = 0; i < numc; i++)
{
val = *p;// * snd_vol) >> 8;
p++;
if (val > 0x7fff)
val = 0x7fff;
else if (val < (short)0x8000)
val = (short)0x8000;
out[out_idx] = val;
out_idx = (out_idx + 1) % outlimit;
}
p += MAXSOUNDCHANNELS - numc;
count -= numc;
}
}
else if (sc->sn.samplebits == 8)
{
unsigned char *out = (unsigned char *) pbuf;
while (count)
{
for (i = 0; i < numc; i++)
{
val = *p;// * snd_vol) >> 8;
p++;
if (val > 0x7fff)
val = 0x7fff;
else if (val < (short)0x8000)
val = (short)0x8000;
out[out_idx] = (val>>8) + 128;
out_idx = (out_idx + 1) % outlimit;
}
p += MAXSOUNDCHANNELS - numc;
count -= numc;
}
}
sc->Unlock(sc, pbuf);
}
/*
===============================================================================
CHANNEL MIXING
===============================================================================
*/
static void SND_PaintChannel8_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
static void SND_PaintChannel16_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
static void SND_PaintChannel8_O4I1 (channel_t *ch, sfxcache_t *sc, int count);
static void SND_PaintChannel16_O4I1 (channel_t *ch, sfxcache_t *sc, int count);
static void SND_PaintChannel8_O6I1 (channel_t *ch, sfxcache_t *sc, int count);
static void SND_PaintChannel16_O6I1 (channel_t *ch, sfxcache_t *sc, int count);
static void SND_PaintChannel8_O8I1 (channel_t *ch, sfxcache_t *sc, int count);
static void SND_PaintChannel16_O8I1 (channel_t *ch, sfxcache_t *sc, int count);
static void SND_PaintChannel8_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
static void SND_PaintChannel16_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count);
//NOTE: MAY NOT CALL SYS_ERROR
void S_PaintChannels(soundcardinfo_t *sc, int endtime)
{
int i;
int end;
channel_t *ch;
sfxcache_t scachebuf;
sfxcache_t *scache;
sfx_t *s;
int ltime, count;
int avail;
unsigned int maxlen = ruleset_allow_overlongsounds.ival?0xffffffffu>>PITCHSHIFT:snd_speed*20;
while (sc->paintedtime < endtime)
{
// if paintbuffer is smaller than DMA buffer
end = endtime;
if (endtime - sc->paintedtime > PAINTBUFFER_SIZE)
end = sc->paintedtime + PAINTBUFFER_SIZE;
// clear the paint buffer
Q_memset(paintbuffer, 0, (end - sc->paintedtime) * sizeof(portable_samplegroup_t));
// paint in the channels.
ch = sc->channel;
for (i=0; i<sc->total_chans ; i++, ch++)
{
s = ch->sfx;
if (!s)
continue;
if (!ch->vol[0] && !ch->vol[1] && !ch->vol[2] && !ch->vol[3] && !ch->vol[4] && !ch->vol[5])
{
//does it still make a sound if it cannot be heard?...
//technically no...
//this code is hacky.
if (!s->decoder.decodedata && s->decoder.buf)
{
scache = s->decoder.buf;
ch->pos += (end-sc->paintedtime)*ch->rate;
if (ch->pos > scache->length)
{
ch->pos = 0;
if (scache->loopstart != -1)
ch->pos = scache->loopstart<<PITCHSHIFT;
else if (!ch->looping)
{
ch->sfx = NULL;
if (s->decoder.abort)
{
if (!S_IsPlayingSomewhere(s))
s->decoder.abort(s);
}
}
}
}
continue;
}
ltime = sc->paintedtime;
while (ltime < end)
{
if (s->decoder.decodedata)
scache = s->decoder.decodedata(s, &scachebuf, ch->pos>>PITCHSHIFT, 1 + (((end - ltime) * ch->rate)>>PITCHSHIFT)); /*1 for luck - balances audio termination below*/
else
scache = s->decoder.buf;
if (!scache)
{
ch->sfx = NULL;
break;
}
// find how many samples till the sample ends (clamp max length)
avail = scache->length;
if (avail > maxlen)
avail = snd_speed*10;
avail = (((int)(scache->soundoffset + avail)<<PITCHSHIFT) - ch->pos) / ch->rate;
// mix the smaller of how much is available or the time left
count = min(avail, end - ltime);
if (avail < 0)
{
Sys_Printf("sound already past end of buffer\n");
avail = 0;
count = 0;
}
if (count > 0)
{
if (ch->pos < 0) //sounds with a pos of 0 are delay-start sounds
{
//don't progress past 0, so it actually starts properly at the right time with no clicks or anything
if (count > (-ch->pos+255)>>PITCHSHIFT)
count = ((-ch->pos+255)>>PITCHSHIFT);
ltime += count;
ch->pos += count*ch->rate;
continue;
}
if (scache->width == 1)
{
if (scache->numchannels==2)
SND_PaintChannel8_O2I2(ch, scache, ltime-sc->paintedtime, count);
else if (sc->sn.numchannels <= 2)
SND_PaintChannel8_O2I1(ch, scache, ltime-sc->paintedtime, count);
else if (sc->sn.numchannels <= 4)
SND_PaintChannel8_O4I1(ch, scache, count);
else if (sc->sn.numchannels <= 6)
SND_PaintChannel8_O6I1(ch, scache, count);
else
SND_PaintChannel8_O8I1(ch, scache, count);
}
else
{
if (scache->numchannels==2)
SND_PaintChannel16_O2I2(ch, scache, ltime-sc->paintedtime, count);
else if (sc->sn.numchannels <= 2)
SND_PaintChannel16_O2I1(ch, scache, ltime-sc->paintedtime, count);
else if (sc->sn.numchannels <= 4)
SND_PaintChannel16_O4I1(ch, scache, count);
else if (sc->sn.numchannels <= 6)
SND_PaintChannel16_O6I1(ch, scache, count);
else
SND_PaintChannel16_O8I1(ch, scache, count);
}
ltime += count;
ch->pos += ch->rate * count;
}
if (count == avail)
{
if (scache->loopstart != -1) /*some wavs contain a loop offset directly in the sound file, such samples loop even if a non-looping builtin was used*/
{
if (scache->length <= scache->loopstart)
break;
ch->pos &= ~((-1)<<PITCHSHIFT); /*clear out all but the subsample offset*/
ch->pos += scache->loopstart<<PITCHSHIFT;
if (!scache->length)
{
scache->loopstart=-1;
break;
}
}
else if (ch->looping && scache->length) /*(static)channels which are explicitly looping always loop from the start*/
{
/*restart it*/
ch->pos = 0;
}
else
{ // channel just stopped
ch->sfx = NULL;
if (s->decoder.abort)
{
if (!S_IsPlayingSomewhere(s))
s->decoder.abort(s);
}
break;
}
}
}
}
// transfer out according to DMA format
S_TransferPaintBuffer(sc, end);
sc->paintedtime = end;
}
}
static void SND_PaintChannel8_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
{
int data;
signed char *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
if (ch->rate != (1<<PITCHSHIFT))
{
sfx = (signed char *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[starttime+i].s[0] += ch->vol[0] * data;
paintbuffer[starttime+i].s[1] += ch->vol[1] * data;
}
}
else
{
sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
data = sfx[i];
paintbuffer[starttime+i].s[0] += ch->vol[0] * data;
paintbuffer[starttime+i].s[1] += ch->vol[1] * data;
}
}
}
static void SND_PaintChannel8_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
{
// int data;
signed char *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
if (ch->rate != (1<<PITCHSHIFT))
{
sfx = (signed char *)sc->data;
for (i=0 ; i<count ; i++)
{
paintbuffer[starttime+i].s[0] += ch->vol[0] * sfx[(pos>>(PITCHSHIFT-1))&~1];
paintbuffer[starttime+i].s[1] += ch->vol[1] * sfx[(pos>>(PITCHSHIFT-1))|1];
pos += ch->rate;
}
}
else
{
sfx = (signed char *)sc->data + (pos>>PITCHSHIFT)*2;
for (i=0 ; i<count ; i++)
{
paintbuffer[starttime+i].s[0] += ch->vol[0] * sfx[(i<<1)];
paintbuffer[starttime+i].s[1] += ch->vol[1] * sfx[(i<<1)+1];
}
}
}
static void SND_PaintChannel8_O4I1 (channel_t *ch, sfxcache_t *sc, int count)
{
signed char *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
if (ch->rate != (1<<PITCHSHIFT))
{
signed char data;
sfx = (signed char *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[i].s[0] += ch->vol[0] * data;
paintbuffer[i].s[1] += ch->vol[1] * data;
paintbuffer[i].s[2] += ch->vol[2] * data;
paintbuffer[i].s[3] += ch->vol[3] * data;
}
}
else
{
sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
}
}
}
static void SND_PaintChannel8_O6I1 (channel_t *ch, sfxcache_t *sc, int count)
{
signed char *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
if (ch->rate != (1<<PITCHSHIFT))
{
signed char data;
sfx = (signed char *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[i].s[0] += ch->vol[0] * data;
paintbuffer[i].s[1] += ch->vol[1] * data;
paintbuffer[i].s[2] += ch->vol[2] * data;
paintbuffer[i].s[3] += ch->vol[3] * data;
paintbuffer[i].s[4] += ch->vol[4] * data;
paintbuffer[i].s[5] += ch->vol[5] * data;
}
}
else
{
sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
paintbuffer[i].s[4] += ch->vol[4] * sfx[i];
paintbuffer[i].s[5] += ch->vol[5] * sfx[i];
}
}
}
static void SND_PaintChannel8_O8I1 (channel_t *ch, sfxcache_t *sc, int count)
{
signed char *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
if (ch->rate != (1<<PITCHSHIFT))
{
signed char data;
sfx = (signed char *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[i].s[0] += ch->vol[0] * data;
paintbuffer[i].s[1] += ch->vol[1] * data;
paintbuffer[i].s[2] += ch->vol[2] * data;
paintbuffer[i].s[3] += ch->vol[3] * data;
paintbuffer[i].s[4] += ch->vol[4] * data;
paintbuffer[i].s[5] += ch->vol[5] * data;
paintbuffer[i].s[6] += ch->vol[6] * data;
paintbuffer[i].s[7] += ch->vol[7] * data;
}
}
else
{
sfx = (signed char *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
paintbuffer[i].s[0] += ch->vol[0] * sfx[i];
paintbuffer[i].s[1] += ch->vol[1] * sfx[i];
paintbuffer[i].s[2] += ch->vol[2] * sfx[i];
paintbuffer[i].s[3] += ch->vol[3] * sfx[i];
paintbuffer[i].s[4] += ch->vol[4] * sfx[i];
paintbuffer[i].s[5] += ch->vol[5] * sfx[i];
paintbuffer[i].s[6] += ch->vol[6] * sfx[i];
paintbuffer[i].s[7] += ch->vol[7] * sfx[i];
}
}
}
static void SND_PaintChannel16_O2I1 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
{
int data;
int left, right;
int leftvol, rightvol;
signed short *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
leftvol = ch->vol[0];
rightvol = ch->vol[1];
if (ch->rate != (1<<PITCHSHIFT))
{
signed short data;
sfx = (signed short *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[starttime+i].s[0] += (leftvol * data)>>8;
paintbuffer[starttime+i].s[1] += (rightvol * data)>>8;
}
}
else
{
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
data = sfx[i];
left = (data * leftvol) >> 8;
right = (data * rightvol) >> 8;
paintbuffer[starttime+i].s[0] += left;
paintbuffer[starttime+i].s[1] += right;
}
}
}
static void SND_PaintChannel16_O2I2 (channel_t *ch, sfxcache_t *sc, int starttime, int count)
{
int leftvol, rightvol;
signed short *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
leftvol = ch->vol[0];
rightvol = ch->vol[1];
if (ch->rate != (1<<PITCHSHIFT))
{
signed short l, r;
sfx = (signed short *)sc->data;
for (i=0 ; i<count ; i++)
{
l = sfx[(pos>>(PITCHSHIFT-1))&~1];
r = sfx[(pos>>(PITCHSHIFT-1))|1];
pos += ch->rate;
paintbuffer[starttime+i].s[0] += (ch->vol[0] * l)>>8;
paintbuffer[starttime+i].s[1] += (ch->vol[1] * r)>>8;
}
}
else
{
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT)*2;
for (i=0 ; i<count ; i++)
{
paintbuffer[starttime+i].s[0] += (*sfx++ * leftvol) >> 8;
paintbuffer[starttime+i].s[1] += (*sfx++ * rightvol) >> 8;
}
}
}
static void SND_PaintChannel16_O4I1 (channel_t *ch, sfxcache_t *sc, int count)
{
int vol[4];
signed short *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
vol[0] = ch->vol[0];
vol[1] = ch->vol[1];
vol[2] = ch->vol[2];
vol[3] = ch->vol[3];
if (ch->rate != (1<<PITCHSHIFT))
{
signed short data;
sfx = (signed short *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[i].s[0] += (vol[0] * data)>>8;
paintbuffer[i].s[1] += (vol[1] * data)>>8;
paintbuffer[i].s[2] += (vol[2] * data)>>8;
paintbuffer[i].s[3] += (vol[3] * data)>>8;
}
}
else
{
sfx = (signed short *)sc->data + pos;
for (i=0 ; i<count ; i++)
{
paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
}
}
}
static void SND_PaintChannel16_O6I1 (channel_t *ch, sfxcache_t *sc, int count)
{
int vol[6];
signed short *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
vol[0] = ch->vol[0];
vol[1] = ch->vol[1];
vol[2] = ch->vol[2];
vol[3] = ch->vol[3];
vol[4] = ch->vol[4];
vol[5] = ch->vol[5];
if (ch->rate != (1<<PITCHSHIFT))
{
signed short data;
sfx = (signed short *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[i].s[0] += (vol[0] * data)>>8;
paintbuffer[i].s[1] += (vol[1] * data)>>8;
paintbuffer[i].s[2] += (vol[2] * data)>>8;
paintbuffer[i].s[3] += (vol[3] * data)>>8;
paintbuffer[i].s[4] += (vol[4] * data)>>8;
paintbuffer[i].s[5] += (vol[5] * data)>>8;
}
}
else
{
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
paintbuffer[i].s[4] += (sfx[i] * vol[4]) >> 8;
paintbuffer[i].s[5] += (sfx[i] * vol[5]) >> 8;
}
}
}
static void SND_PaintChannel16_O8I1 (channel_t *ch, sfxcache_t *sc, int count)
{
int vol[8];
signed short *sfx;
int i;
unsigned int pos = ch->pos-(sc->soundoffset<<PITCHSHIFT);
vol[0] = ch->vol[0];
vol[1] = ch->vol[1];
vol[2] = ch->vol[2];
vol[3] = ch->vol[3];
vol[4] = ch->vol[4];
vol[5] = ch->vol[5];
vol[6] = ch->vol[6];
vol[7] = ch->vol[7];
if (ch->rate != (1<<PITCHSHIFT))
{
signed short data;
sfx = (signed short *)sc->data;
for (i=0 ; i<count ; i++)
{
data = sfx[pos>>PITCHSHIFT];
pos += ch->rate;
paintbuffer[i].s[0] += (vol[0] * data)>>8;
paintbuffer[i].s[1] += (vol[1] * data)>>8;
paintbuffer[i].s[2] += (vol[2] * data)>>8;
paintbuffer[i].s[3] += (vol[3] * data)>>8;
paintbuffer[i].s[4] += (vol[4] * data)>>8;
paintbuffer[i].s[5] += (vol[5] * data)>>8;
paintbuffer[i].s[6] += (vol[6] * data)>>8;
paintbuffer[i].s[7] += (vol[7] * data)>>8;
}
}
else
{
sfx = (signed short *)sc->data + (pos>>PITCHSHIFT);
for (i=0 ; i<count ; i++)
{
paintbuffer[i].s[0] += (sfx[i] * vol[0]) >> 8;
paintbuffer[i].s[1] += (sfx[i] * vol[1]) >> 8;
paintbuffer[i].s[2] += (sfx[i] * vol[2]) >> 8;
paintbuffer[i].s[3] += (sfx[i] * vol[3]) >> 8;
paintbuffer[i].s[4] += (sfx[i] * vol[4]) >> 8;
paintbuffer[i].s[5] += (sfx[i] * vol[5]) >> 8;
paintbuffer[i].s[6] += (sfx[i] * vol[6]) >> 8;
paintbuffer[i].s[7] += (sfx[i] * vol[7]) >> 8;
}
}
}
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