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|
static int16_t (*myvoltab)[2][256];
static int16_t (*myinterpoltabq)[32][256][2];
static int16_t (*myinterpoltabq2)[16][256][4];
void mixqSetupAddresses(int16_t (*voltab)[2][256], int16_t (*interpoltabq)[32][256][2], int16_t (*interpoltabq2)[16][256][4])
{
myvoltab=voltab;
myinterpoltabq=interpoltabq;
myinterpoltabq2=interpoltabq2;
}
static void playquiet(int16_t *buf, uint32_t len, struct channel *chan)
{
}
static inline int32_t interp_none8(const struct channel *chan, const uint32_t pos, uint32_t fpos)
{
return chan->realsamp.bit8[pos]<<8;
}
static inline int32_t interp_none16(const struct channel *chan, const uint32_t pos, uint32_t fpos)
{
return chan->realsamp.bit16[pos];
}
static inline int32_t interp_i8(const struct channel *chan, const uint32_t pos, uint32_t fpos)
{
uint8_t cache = fpos>>11;
return myinterpoltabq[0][cache][(uint8_t)chan->realsamp.bit8[pos]][0]
+
myinterpoltabq[0][cache][(uint8_t)chan->realsamp.bit8[pos+1]][1];
}
static inline int32_t interp_i16(const struct channel *chan, const uint32_t pos, uint32_t fpos)
{
uint8_t cache = fpos>>11;
return myinterpoltabq[0][cache][(uint8_t)(chan->realsamp.bit16[pos]>>8)][0]
+
myinterpoltabq[0][cache][(uint8_t)(chan->realsamp.bit16[pos+1]>>8)][1]
+
myinterpoltabq[1][cache][(uint8_t)(chan->realsamp.bit16[pos]&0xff)][0]
+
myinterpoltabq[1][cache][(uint8_t)(chan->realsamp.bit16[pos+1]&0xff)][1];
}
static inline int32_t interp_i28(const struct channel *chan, const uint32_t pos, uint32_t fpos)
{
uint8_t cache = fpos>>12;
return myinterpoltabq2[0][cache][(uint8_t)(chan->realsamp.bit8[pos])][0]
+
myinterpoltabq2[0][cache][(uint8_t)(chan->realsamp.bit8[pos+1])][1]
+
myinterpoltabq2[0][cache][(uint8_t)(chan->realsamp.bit8[pos+2])][2];
}
static inline int32_t interp_i216(const struct channel *chan, const uint32_t pos, uint32_t fpos)
{
uint8_t cache = fpos>>12;
return myinterpoltabq2[0][cache][(uint8_t)(chan->realsamp.bit16[pos]>>8)][0]
+
myinterpoltabq2[0][cache][(uint8_t)(chan->realsamp.bit16[pos+1]>>8)][1]
+
myinterpoltabq2[0][cache][(uint8_t)(chan->realsamp.bit16[pos+2]>>8)][2]
+
myinterpoltabq2[1][cache][(uint8_t)(chan->realsamp.bit16[pos]&0xff)][0]
+
myinterpoltabq2[1][cache][(uint8_t)(chan->realsamp.bit16[pos+1]&0xff)][1]
+
myinterpoltabq2[1][cache][(uint8_t)(chan->realsamp.bit16[pos+2]&0xff)][2];
}
#define MIX_TEMPLATE(NAME, INTERP) \
static void \
NAME(int16_t *buf, \
uint32_t len, \
struct channel *chan) \
{ \
uint32_t pos=chan->pos; \
uint32_t fpos=chan->fpos; \
uint32_t fadd=chan->step&0xffff; \
uint32_t posadd=(int16_t)(chan->step>>16); \
\
while (len) \
{ \
*(buf++) = interp_##INTERP(chan, pos, fpos); \
fpos+=fadd; \
if (fpos&0xffff0000) \
{ \
pos++; \
fpos&=0xffff; \
} \
pos+=posadd; \
len--; \
} \
}
//#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused"
MIX_TEMPLATE(playmono, none8)
MIX_TEMPLATE(playmono16, none16)
MIX_TEMPLATE(playmonoi, i8)
MIX_TEMPLATE(playmonoi16, i16)
MIX_TEMPLATE(playmonoi2, i28)
MIX_TEMPLATE(playmonoi216, i216)
//#pragma GCC diagnostic pop
void mixqPlayChannel(int16_t *buf, uint32_t len, struct channel *chan, int quiet)
{
uint32_t fillen=0;
uint32_t mixlen;
int inloop;
void (*playrout)(int16_t *buf, uint32_t len, struct channel *chan);
if (quiet)
{
playrout=playquiet;
} else {
if (chan->status&MIXQ_INTERPOLATE)
{
if (chan->status&MIXQ_INTERPOLATEMAX)
{
if (chan->status&MIXQ_PLAY16BIT)
{
playrout=playmonoi216;
} else {
playrout=playmonoi2;
}
} else {
if (chan->status&MIXQ_PLAY16BIT)
{
playrout=playmonoi16;
} else {
playrout=playmonoi;
}
}
} else {
if (chan->status&MIXQ_PLAY16BIT)
{
playrout=playmono16;
} else {
playrout=playmono;
}
}
}
mixqPlayChannel_bigloop:
inloop=0;
mixlen=len;
if (chan->step)
{
uint32_t abs_step; /* abs of chan->step */
uint32_t data_left;
uint16_t data_left_fraction;
if (chan->step<0)
{
abs_step=-chan->step;
data_left = chan->pos;
data_left_fraction = chan->fpos;
if (chan->status&MIXQ_LOOPED)
{
if (chan->pos >= chan->loopstart)
{
data_left -= chan->loopstart;
inloop = 1;
}
}
} else {
abs_step=chan->step;
data_left = chan->length - chan->pos - (!chan->fpos);
data_left_fraction = -chan->fpos;
if (chan->status&MIXQ_LOOPED)
{
if (chan->pos < chan->loopend)
{
data_left -= chan->length - chan->loopend;
inloop = 1;
}
}
}
/* data_left should now be the end of the loop envelope */
{
/* fprintf(stderr, "Samples available to use: %d/0x%08x\n", data_left, data_left_fraction); */
uint64_t tmppos=((((uint64_t)data_left)<<16)|data_left_fraction)+((uint32_t)abs_step)-1;
/* fprintf(stderr, "Samples available to use hidef: %lld/0x%012llx\n", tmppos, tmppos);*/
if ((tmppos>>32)<abs_step)
{/* this is the safe check to avoid overflow in div */
uint32_t tmplen;
tmplen=tmppos/abs_step;
/* fprintf(stderr, "Samples at current playrate would be output into %d samples\n", tmplen); */
if (mixlen>=tmplen)
{
/* fprintf(stderr, "world wants more data than we can provide, limit output\n");*/
mixlen=tmplen;
if (!inloop)
{
/* fprintf(stderr, "We are not in loop, configure fillen\n");*/
chan->status&=~MIXQ_PLAYING;
fillen=(len-tmplen); /* the gap that is left */
len=mixlen;
}
}
}
}
}
playrout(buf, mixlen, chan);
buf+=mixlen;
len-=mixlen;
{
int64_t tmp64=((int64_t)chan->step)*mixlen + (uint16_t)chan->fpos;
chan->fpos=tmp64&0xffff;
chan->pos+=(tmp64>>16);
}
if (inloop)
{
int32_t mypos = chan->pos; /* eax */
if (chan->step<0)
{
if (mypos>=(int32_t)chan->loopstart)
return;
if (!(chan->status&MIXQ_PINGPONGLOOP))
{
mypos+=chan->replen;
} else {
chan->step=-chan->step;
if ((chan->fpos=-chan->fpos))
mypos++;
mypos=chan->loopstart+chan->loopstart-mypos;
}
} else {
if (mypos<chan->loopend)
return;
if (!(chan->status&MIXQ_PINGPONGLOOP))
{
mypos-=chan->replen;
} else {
chan->step=-chan->step;
if ((chan->fpos=-chan->fpos))
mypos++;
mypos=chan->loopend+chan->loopend-mypos;
}
}
chan->pos=mypos;
if (len)
goto mixqPlayChannel_bigloop;
}
if (fillen)
{
int16_t sample;
int count;
chan->pos=chan->length;
if (!(chan->status&MIXQ_PLAY16BIT))
{
sample=chan->realsamp.bit8[chan->pos]<<8;
} else {
sample=chan->realsamp.bit16[chan->pos];
}
for (count=0;count<fillen;count++)
*(buf++)=sample;
}
}
void mixqAmplifyChannel(int32_t *buf, int16_t *src, uint32_t len, int32_t vol, uint32_t step)
{
while (len)
{
(*buf) += myvoltab[vol][0][(uint8_t)((*src)>>8)] + myvoltab[vol][1][(uint8_t)((*src)&0xff)];
src++;
len--;
buf+=step/sizeof(uint32_t);
}
}
void mixqAmplifyChannelUp(int32_t *buf, int16_t *src, uint32_t len, int32_t vol, uint32_t step)
{
while (len)
{
(*buf) += myvoltab[vol][0][(uint8_t)((*src)>>8)] + myvoltab[vol][1][(uint8_t)((*src)&0xff)];
src++;
vol++;
len--;
buf+=step/sizeof(uint32_t);
}
}
void mixqAmplifyChannelDown(int32_t *buf, int16_t *src, uint32_t len, int32_t vol, uint32_t step)
{
while (len)
{
(*buf) += myvoltab[vol][0][(uint8_t)((*src)>>8)] + myvoltab[vol][1][(uint8_t)((*src)&0xff)];
src++;
vol--;
len--;
buf+=step/sizeof(uint32_t);
}
}
|
