static void byteswap( ARParam *param )
{
ARParam wparam;
int i, j;
byteSwapInt( &(param->xsize), &(wparam.xsize) );
byteSwapInt( &(param->ysize), &(wparam.ysize) );
for( j = 0; j < 3; j++ ) {
for( i = 0; i < 4; i++ ) {
byteSwapDouble( &(param->mat[j][i]), &(wparam.mat[j][i]) );
}
}
for( i = 0; i < 4; i++ ) {
byteSwapDouble( &(param->dist_factor[i]), &(wparam.dist_factor[i]) );
}
*param = wparam;
}
/* Put an int into the byte buffer */
int BbPutInt(PBYTE_BUFFER buff, int i) {
if (buff->position + sizeof(i) > buff->length) {
return 0;
}
i = byteSwapInt(buff, i);
memcpy(&buff->buffer[buff->position], &i, sizeof(i));
buff->position += sizeof(i);
return 1;
}
/* Get an int from the byte buffer */
int BbGetInt(PBYTE_BUFFER buff, int *i) {
if (buff->position + sizeof(*i) > buff->length) {
return 0;
}
memcpy(i, &buff->buffer[buff->position], sizeof(*i));
buff->position += sizeof(*i);
*i = byteSwapInt(buff, *i);
return 1;
}
static void byteswap2( ARSParam *sparam )
{
ARSParam wsparam;
int i, j;
byteSwapInt( &(sparam->xsize), &(wsparam.xsize) );
byteSwapInt( &(sparam->ysize), &(wsparam.ysize) );
for( j = 0; j < 3; j++ ) {
for( i = 0; i < 4; i++ ) {
byteSwapDouble( &(sparam->matL[j][i]), &(wsparam.matL[j][i]) );
byteSwapDouble( &(sparam->matR[j][i]), &(wsparam.matR[j][i]) );
byteSwapDouble( &(sparam->matL2R[j][i]), &(wsparam.matL2R[j][i]) );
}
}
for( i = 0; i < 4; i++ ) {
byteSwapDouble( &(sparam->dist_factorL[i]), &(wsparam.dist_factorL[i]) );
byteSwapDouble( &(sparam->dist_factorR[i]), &(wsparam.dist_factorR[i]) );
}
*sparam = wsparam;
}
int MIDIFile::initMIDIFile(const char* _fileName)
{
m_pFileBuf = loadFile(_fileName, m_fileSize);
if (!m_pFileBuf)
{
printf("something went wrong during file load.\n");
return 1;
}
//1: process header
m_pHeader = (MIDIHeaderInfo*)m_pFileBuf;
int numTracks = byteSwapShort(m_pHeader->tracks);
m_PulsesPerQuarterNote = byteSwapShort(m_pHeader->ticks);
//2: process body
unsigned char* pBody = m_pFileBuf += sizeof(MIDIHeaderInfo);
auto pCurrentTrack = (char*) pBody;
auto pCurrentTrackInfo = (MIDITrackInfo*)pCurrentTrack;
for (int i = 0; i < numTracks; i++)
{
if (pCurrentTrackInfo->id != 0x6b72544d)//magic number: 0xkrTM -> big endian MTrk
{
printf("Fatal Error: MTrk identifier not found when parsing file: %s\n", _fileName);
return 1;
}
MIDITrack currentTrack;
currentTrack.m_pTrackInfo = pCurrentTrackInfo;
currentTrack.m_pBuffer = (unsigned char*)pCurrentTrack + sizeof(MIDITrackInfo);
currentTrack.m_absTime = 0;
currentTrack.m_lastEvent = 0;
m_tracks.push_back(currentTrack);
//increment pCurrentTrack to point to the next track
pCurrentTrack += sizeof(MIDITrackInfo) + byteSwapInt(m_tracks[i].m_pTrackInfo->length);
}
return 0;
}
