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C219: new sample format (work in progress)

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This commit is contained in:
tildearrow 2023-08-28 20:31:22 -05:00
parent 9cb239438e
commit a5f351c232
8 changed files with 146 additions and 49 deletions
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7
src/engine/platform/c140.cpp
View file

@ -575,13 +575,12 @@ void DivPlatformC140::renderSamples(int sysID) {
length=getSampleMemCapacity()-memPos;
logW("out of C219 memory for sample %d!",i);
}
if (s->depth==DIV_SAMPLE_DEPTH_MULAW) {
if (s->depth==DIV_SAMPLE_DEPTH_C219) {
for (unsigned int i=0; i<length; i++) {
if (i>=s->lengthMuLaw) {
if (i>=s->lengthC219) {
sampleMem[i+memPos]=0;
} else {
unsigned char x=s->dataMuLaw[i]^0xff;
sampleMem[i+memPos]=x;
sampleMem[i+memPos]=s->dataC219[i];
}
}
} else {

43
src/engine/platform/lynx.cpp
View file

@ -19,6 +19,7 @@
#include "lynx.h"
#include "../engine.h"
#include "../bsr.h"
#include <math.h>
#define rWrite(a,v) {if (!skipRegisterWrites) {mikey->write(a,v); if (dumpWrites) {addWrite(a,v);}}}
@ -36,48 +37,6 @@
#define CHIP_DIVIDER 64
#define CHIP_FREQBASE 16000000
#if defined( _MSC_VER )
#include <intrin.h>
static int bsr(uint16_t v) {
unsigned long idx;
if (_BitScanReverse(&idx,(unsigned long)v)) {
return idx;
}
else {
return -1;
}
}
#elif defined( __GNUC__ )
static int bsr(uint16_t v)
{
if (v) {
return 32 - __builtin_clz(v);
}
else{
return -1;
}
}
#else
static int bsr(uint16_t v)
{
uint16_t mask = 0x8000;
for (int i = 15; i >= 0; --i) {
if (v&mask)
return (int)i;
mask>>=1;
}
return -1;
}
#endif
static int32_t clamp(int32_t v, int32_t lo, int32_t hi)
{
return v<lo?lo:(v>hi?hi:v);