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/**
* JASSeqReader.cpp
*
*/
#include "JSystem/JSystem.h" // IWYU pragma: keep
#include "JSystem/JAudio2/JASSeqReader.h"
void JASSeqReader::init() {
mBase = 0;
mCurPos = 0;
mCurStackDepth = 0;
for (int i = 0; i < JAS_SEQ_STACK_SIZE; i++) {
mReturnAddr[i] = NULL;
mLoopCount[i] = 0;
}
}
void JASSeqReader::init(void* base) {
mBase = (u8*)base;
mCurPos = mBase;
mCurStackDepth = 0;
for (int i = 0; i < JAS_SEQ_STACK_SIZE; i++) {
mReturnAddr[i] = NULL;
mLoopCount[i] = 0;
}
}
bool JASSeqReader::call(u32 param_0) {
if (mCurStackDepth >= JAS_SEQ_STACK_SIZE) {
JUT_WARN(42, "%s", "Cannot exec call command");
return false;
}
mReturnAddr[mCurStackDepth++] = (u16*)mCurPos;
mCurPos = mBase + param_0;
return true;
}
bool JASSeqReader::loopStart(u32 param_0) {
if (JAS_SEQ_STACK_SIZE <= mCurStackDepth) {
JUT_WARN(53, "%s", "Cannot exec loopStart command");
return false;
}
mReturnAddr[mCurStackDepth] = (u16*)mCurPos;
mLoopCount[mCurStackDepth++] = param_0;
return true;
}
bool JASSeqReader::loopEnd() {
if (mCurStackDepth == 0) {
JUT_WARN(65, "%s", "cannot loopE for call-stack is NULL");
return false;
}
u16 tmp = mLoopCount[mCurStackDepth - 1];
if (tmp != 0) {
tmp--;
}
if (!tmp) {
mCurStackDepth--;
return true;
}
mLoopCount[mCurStackDepth - 1] = tmp;
mCurPos = (u8*)mReturnAddr[mCurStackDepth - 1];
return true;
}
bool JASSeqReader::ret() {
if (mCurStackDepth == 0) {
return false;
}
mCurPos = (u8*)mReturnAddr[--mCurStackDepth];
return true;
}
int JASSeqReader::readMidiValue() {
int byte = readByte();
if (!(byte & 0x80)) {
return byte;
}
byte &= 0x7f;
int i = 0;
while (true) {
if (2 < i) {
JUT_WARN(100, "%s", "readMidiValue: Too large value");
return 0;
}
u8 newByte = readByte();
byte = byte << 7;
byte |= newByte & 0x7f;
if (!(newByte & 0x80)) {
break;
}
i++;
}
return byte;
}
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