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-rw-r--r--core/qmpmidiread.cpp31
1 files changed, 17 insertions, 14 deletions
diff --git a/core/qmpmidiread.cpp b/core/qmpmidiread.cpp
index 42cb88a..e7d92d3 100644
--- a/core/qmpmidiread.cpp
+++ b/core/qmpmidiread.cpp
@@ -12,6 +12,7 @@ const char* GM1SysX="\xF0\x7E\x7F\x09\x01\xF7";
const char* GM2SysX="\xF0\x7E\x7F\x09\x03\xF7";
const char* GSSysEx="\xF0\x41\x10\x42\x12\x40\x00\x7F\x00\x41\xF7";
const char* XGSysEx="\xF0\x43\x10\x4C\x00\x00\x7E\x00\xF7";
+#define assert(x) if(!(x))this->error(false,"assertion failure @ qmpmidiread.cpp:%d",__LINE__)
void CSMFReader::error(int fatal,const char* format,...)
{
va_list ap;char buf[1024],bufr[1024];
@@ -68,43 +69,44 @@ int CSMFReader::eventReader()//returns 0 if End of Track encountered
if((type&0x0F)==0x0F)//Meta Event
{
char metatype=fgetc(f);
+ uint32_t len=readVL();char* str=NULL;
+ if(len<=1024&&len>0)str=new char[len+8];
+ if(str)fread(str,1,len,f);else fseek(f,len,SEEK_CUR);
+ if(str)str[len]='\0';
switch(metatype)
{
case 0x00://Sequence Number
- fgetc(f);fgetc(f);fgetc(f);
+ assert(len==2||len==0);
break;
case 0x20://Channel Prefix
- fgetc(f);fgetc(f);
+ assert(len==1);
break;
case 0x2F://End of Track
- fgetc(f);
+ assert(len==0);
return 0;
break;
case 0x51://Set Tempo
- p1=readDW();p1&=0x00FFFFFF;
+ assert(len==3);
+ p1=((str[0]&0xffu)<<16u)|(str[1]&0xffu)<<8u|(str[2]&0xffu);
curTrack->appendEvent(SEvent(curid,curt,type,metatype,p1));
break;
case 0x54://SMTPE offset, not handled.
- fgetc(f);fgetc(f);fgetc(f);
- fgetc(f);fgetc(f);fgetc(f);
+ assert(len==5);
break;
case 0x58://Time signature
- fgetc(f);p1=readDW();
+ assert(len==4);
+ p1=((str[0]&0xffu)<<24u)|(str[1]&0xffu)<<16u|(str[2]&0xffu)<<8u|(str[3]&0xffu);
curTrack->appendEvent(SEvent(curid,curt,type,metatype,p1));
break;
case 0x59://Key signature
- fgetc(f);p1=readSW();
+ assert(len==2);
+ p1=(str[0]&0xffu)<<8u|(str[1]&0xffu);
curTrack->appendEvent(SEvent(curid,curt,type,metatype,p1));
break;
case 0x01:case 0x02:case 0x03:
case 0x04:case 0x05:case 0x06:
case 0x07:case 0x7F:default://text-like meta
{
- uint32_t len=readVL(),c;char* str=NULL;
- if(len<=1024&&len>0)str=new char[len+8];
- for(c=0;c<len;++c)
- if(str)str[c]=fgetc(f);else fgetc(f);
- if(str)str[c]='\0';
curTrack->appendEvent(SEvent(curid,curt,type,metatype,0,str));
if(str&&metatype==0x03&&!ret->title)
{
@@ -116,9 +118,9 @@ int CSMFReader::eventReader()//returns 0 if End of Track encountered
ret->copyright=new char[len+8];
strcpy(ret->copyright,str);
}
- if(len<=1024&&len>0)delete[] str;
}
}
+ if(str)delete[] str;
}
else if((type&0x0F)==0x00||(type&0x0F)==0x07)//SysEx
{
@@ -200,6 +202,7 @@ int CSMFReader::chunkReader(int hdrXp)
uint32_t chnklen=readDW();fseek(f,chnklen,SEEK_CUR);return 0;
}
else return trackChunkReader(),1;
+ return 0;
}
CSMFReader::CSMFReader()
{