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New interpolating mixer routines

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1909
This commit is contained in:
Sjoerd van der Berg 2004-08-23 08:11:58 +00:00
parent 27a331e73d
commit 7bbec56bed
6 changed files with 76 additions and 66 deletions
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27
src/hardware/disney.cpp
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@ -22,9 +22,6 @@
#include "mixer.h"
#include "pic.h"
#include "setup.h"
#include "programs.h"
#define DISNEY_BASE 0x0378
@ -35,11 +32,15 @@ static struct {
Bit8u status;
Bit8u control;
Bit8u buffer[DISNEY_SIZE];
Bitu used;
MIXER_Channel * chan;
Bitu used;Bitu last_used;
MixerChannel * chan;
} disney;
static void disney_write(Bitu port,Bitu val,Bitu iolen) {
if (!disney.last_used) {
disney.chan->Enable(true);
}
disney.last_used=PIC_Ticks;
switch (port-DISNEY_BASE) {
case 0: /* Data Port */
disney.data=val;
@ -80,18 +81,21 @@ static Bitu disney_read(Bitu port,Bitu iolen) {
}
static void DISNEY_CallBack(Bit8u * stream,Bit32u len) {
static void DISNEY_CallBack(Bitu len) {
if (!len) return;
if (disney.used>len) {
memcpy(stream,disney.buffer,len);
disney.chan->AddSamples_m8(len,disney.buffer);
memmove(disney.buffer,&disney.buffer[len],disney.used-len);
disney.used-=len;
return;
} else {
memcpy(stream,disney.buffer,disney.used);
memset(stream+disney.used,0x80,len-disney.used);
disney.chan->AddSamples_m8(disney.used,disney.buffer);
disney.chan->AddSilence();
disney.used=0;
}
if (disney.last_used+5000<PIC_Ticks) {
disney.last_used=0;
disney.chan->Enable(false);
}
}
@ -104,11 +108,10 @@ void DISNEY_Init(Section* sec) {
IO_RegisterReadHandler(DISNEY_BASE,disney_read,IO_MB,3);
disney.chan=MIXER_AddChannel(&DISNEY_CallBack,7000,"DISNEY");
MIXER_SetMode(disney.chan,MIXER_8MONO);
MIXER_Enable(disney.chan,true);
disney.status=0x84;
disney.control=0;
disney.used=0;
disney.last_used=0;
}