269 |
* steps. |
* steps. |
270 |
* |
* |
271 |
* Once the whole data was processed by __calculateCRC(), one should |
* Once the whole data was processed by __calculateCRC(), one should |
272 |
* call __encodeCRC() to get the final CRC result. |
* call __finalizeCRC() to get the final CRC result. |
273 |
* |
* |
274 |
* @param buf - pointer to data the CRC shall be calculated of |
* @param buf - pointer to data the CRC shall be calculated of |
275 |
* @param bufSize - size of the data to be processed |
* @param bufSize - size of the data to be processed |
276 |
* @param crc - variable the CRC sum shall be stored to |
* @param crc - variable the CRC sum shall be stored to |
277 |
*/ |
*/ |
278 |
static void __calculateCRC(unsigned char* buf, int bufSize, uint32_t& crc) { |
static void __calculateCRC(unsigned char* buf, size_t bufSize, uint32_t& crc) { |
279 |
for (int i = 0 ; i < bufSize ; i++) { |
for (size_t i = 0 ; i < bufSize ; i++) { |
280 |
crc = __CRCTable[(crc ^ buf[i]) & 0xff] ^ (crc >> 8); |
crc = __CRCTable[(crc ^ buf[i]) & 0xff] ^ (crc >> 8); |
281 |
} |
} |
282 |
} |
} |
286 |
* |
* |
287 |
* @param crc - variable previously passed to __calculateCRC() |
* @param crc - variable previously passed to __calculateCRC() |
288 |
*/ |
*/ |
289 |
inline static uint32_t __encodeCRC(const uint32_t& crc) { |
inline static void __finalizeCRC(uint32_t& crc) { |
290 |
return crc ^ 0xffffffff; |
crc ^= 0xffffffff; |
291 |
} |
} |
292 |
|
|
293 |
|
|
338 |
* ('wvpl') list chunk |
* ('wvpl') list chunk |
339 |
* @param fileNo - number of an extension file where this sample |
* @param fileNo - number of an extension file where this sample |
340 |
* is located, 0 otherwise |
* is located, 0 otherwise |
341 |
|
* @param index - wave pool index of sample (may be -1 on new sample) |
342 |
*/ |
*/ |
343 |
Sample::Sample(File* pFile, RIFF::List* waveList, file_offset_t WavePoolOffset, unsigned long fileNo) : DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) { |
Sample::Sample(File* pFile, RIFF::List* waveList, file_offset_t WavePoolOffset, unsigned long fileNo, int index) |
344 |
|
: DLS::Sample((DLS::File*) pFile, waveList, WavePoolOffset) |
345 |
|
{ |
346 |
static const DLS::Info::string_length_t fixedStringLengths[] = { |
static const DLS::Info::string_length_t fixedStringLengths[] = { |
347 |
{ CHUNK_ID_INAM, 64 }, |
{ CHUNK_ID_INAM, 64 }, |
348 |
{ 0, 0 } |
{ 0, 0 } |
352 |
FileNo = fileNo; |
FileNo = fileNo; |
353 |
|
|
354 |
__resetCRC(crc); |
__resetCRC(crc); |
355 |
|
// if this is not a new sample, try to get the sample's already existing |
356 |
|
// CRC32 checksum from disk, this checksum will reflect the sample's CRC32 |
357 |
|
// checksum of the time when the sample was consciously modified by the |
358 |
|
// user for the last time (by calling Sample::Write() that is). |
359 |
|
if (index >= 0) { // not a new file ... |
360 |
|
try { |
361 |
|
uint32_t crc = pFile->GetSampleChecksumByIndex(index); |
362 |
|
this->crc = crc; |
363 |
|
} catch (...) {} |
364 |
|
} |
365 |
|
|
366 |
pCk3gix = waveList->GetSubChunk(CHUNK_ID_3GIX); |
pCk3gix = waveList->GetSubChunk(CHUNK_ID_3GIX); |
367 |
if (pCk3gix) { |
if (pCk3gix) { |
1294 |
// if this is the last write, update the checksum chunk in the |
// if this is the last write, update the checksum chunk in the |
1295 |
// file |
// file |
1296 |
if (pCkData->GetPos() == pCkData->GetSize()) { |
if (pCkData->GetPos() == pCkData->GetSize()) { |
1297 |
|
__finalizeCRC(crc); |
1298 |
File* pFile = static_cast<File*>(GetParent()); |
File* pFile = static_cast<File*>(GetParent()); |
1299 |
pFile->SetSampleChecksum(this, __encodeCRC(crc)); |
pFile->SetSampleChecksum(this, crc); |
1300 |
} |
} |
1301 |
return res; |
return res; |
1302 |
} |
} |
1355 |
return pGroup; |
return pGroup; |
1356 |
} |
} |
1357 |
|
|
1358 |
|
/** |
1359 |
|
* Returns the CRC-32 checksum of the sample's raw wave form data at the |
1360 |
|
* time when this sample's wave form data was modified for the last time |
1361 |
|
* by calling Write(). This checksum only covers the raw wave form data, |
1362 |
|
* not any meta informations like i.e. bit depth or loop points. Since |
1363 |
|
* this method just returns the checksum stored for this sample i.e. when |
1364 |
|
* the gig file was loaded, this method returns immediately. So it does no |
1365 |
|
* recalcuation of the checksum with the currently available sample wave |
1366 |
|
* form data. |
1367 |
|
* |
1368 |
|
* @see VerifyWaveData() |
1369 |
|
*/ |
1370 |
|
uint32_t Sample::GetWaveDataCRC32Checksum() { |
1371 |
|
return crc; |
1372 |
|
} |
1373 |
|
|
1374 |
|
/** |
1375 |
|
* Checks the integrity of this sample's raw audio wave data. Whenever a |
1376 |
|
* Sample's raw wave data is intentionally modified (i.e. by calling |
1377 |
|
* Write() and supplying the new raw audio wave form data) a CRC32 checksum |
1378 |
|
* is calculated and stored/updated for this sample, along to the sample's |
1379 |
|
* meta informations. |
1380 |
|
* |
1381 |
|
* Now by calling this method the current raw audio wave data is checked |
1382 |
|
* against the already stored CRC32 check sum in order to check whether the |
1383 |
|
* sample data had been damaged unintentionally for some reason. Since by |
1384 |
|
* calling this method always the entire raw audio wave data has to be |
1385 |
|
* read, verifying all samples this way may take a long time accordingly. |
1386 |
|
* And that's also the reason why the sample integrity is not checked by |
1387 |
|
* default whenever a gig file is loaded. So this method must be called |
1388 |
|
* explicitly to fulfill this task. |
1389 |
|
* |
1390 |
|
* @param pActually - (optional) if provided, will be set to the actually |
1391 |
|
* calculated checksum of the current raw wave form data, |
1392 |
|
* you can get the expected checksum instead by calling |
1393 |
|
* GetWaveDataCRC32Checksum() |
1394 |
|
* @returns true if sample is OK or false if the sample is damaged |
1395 |
|
* @throws Exception if no checksum had been stored to disk for this |
1396 |
|
* sample yet, or on I/O issues |
1397 |
|
* @see GetWaveDataCRC32Checksum() |
1398 |
|
*/ |
1399 |
|
bool Sample::VerifyWaveData(uint32_t* pActually) { |
1400 |
|
//File* pFile = static_cast<File*>(GetParent()); |
1401 |
|
uint32_t crc = CalculateWaveDataChecksum(); |
1402 |
|
if (pActually) *pActually = crc; |
1403 |
|
return crc == this->crc; |
1404 |
|
} |
1405 |
|
|
1406 |
|
uint32_t Sample::CalculateWaveDataChecksum() { |
1407 |
|
const size_t sz = 20*1024; // 20kB buffer size |
1408 |
|
std::vector<uint8_t> buffer(sz); |
1409 |
|
buffer.resize(sz); |
1410 |
|
|
1411 |
|
const size_t n = sz / FrameSize; |
1412 |
|
SetPos(0); |
1413 |
|
uint32_t crc = 0; |
1414 |
|
__resetCRC(crc); |
1415 |
|
while (true) { |
1416 |
|
file_offset_t nRead = Read(&buffer[0], n); |
1417 |
|
if (nRead <= 0) break; |
1418 |
|
__calculateCRC(&buffer[0], nRead * FrameSize, crc); |
1419 |
|
} |
1420 |
|
__finalizeCRC(crc); |
1421 |
|
return crc; |
1422 |
|
} |
1423 |
|
|
1424 |
Sample::~Sample() { |
Sample::~Sample() { |
1425 |
Instances--; |
Instances--; |
1426 |
if (!Instances && InternalDecompressionBuffer.Size) { |
if (!Instances && InternalDecompressionBuffer.Size) { |
1631 |
EG2Attack = 0.0; |
EG2Attack = 0.0; |
1632 |
EG2Decay1 = 0.005; |
EG2Decay1 = 0.005; |
1633 |
EG2Sustain = 1000; |
EG2Sustain = 1000; |
1634 |
EG2Release = 0.3; |
EG2Release = 60; |
1635 |
LFO2ControlDepth = 0; |
LFO2ControlDepth = 0; |
1636 |
LFO2Frequency = 1.0; |
LFO2Frequency = 1.0; |
1637 |
LFO2InternalDepth = 0; |
LFO2InternalDepth = 0; |
1830 |
|
|
1831 |
// update '3ewa' chunk with DimensionRegion's current settings |
// update '3ewa' chunk with DimensionRegion's current settings |
1832 |
|
|
1833 |
const uint32_t chunksize = _3ewa->GetNewSize(); |
const uint32_t chunksize = (uint32_t) _3ewa->GetNewSize(); |
1834 |
store32(&pData[0], chunksize); // unknown, always chunk size? |
store32(&pData[0], chunksize); // unknown, always chunk size? |
1835 |
|
|
1836 |
const int32_t lfo3freq = (int32_t) GIG_EXP_ENCODE(LFO3Frequency); |
const int32_t lfo3freq = (int32_t) GIG_EXP_ENCODE(LFO3Frequency); |
3186 |
int step = 1; |
int step = 1; |
3187 |
for (int i = 0 ; i < veldim ; i++) step <<= pDimensionDefinitions[i].bits; |
for (int i = 0 ; i < veldim ; i++) step <<= pDimensionDefinitions[i].bits; |
3188 |
int skipveldim = (step << pDimensionDefinitions[veldim].bits) - step; |
int skipveldim = (step << pDimensionDefinitions[veldim].bits) - step; |
|
int end = step * pDimensionDefinitions[veldim].zones; |
|
3189 |
|
|
3190 |
// loop through all dimension regions for all dimensions except the velocity dimension |
// loop through all dimension regions for all dimensions except the velocity dimension |
3191 |
int dim[8] = { 0 }; |
int dim[8] = { 0 }; |
3192 |
for (int i = 0 ; i < DimensionRegions ; i++) { |
for (int i = 0 ; i < DimensionRegions ; i++) { |
3193 |
|
const int end = i + step * pDimensionDefinitions[veldim].zones; |
3194 |
|
|
3195 |
|
// create a velocity table for all cases where the velocity zone is zero |
3196 |
if (pDimensionRegions[i]->DimensionUpperLimits[veldim] || |
if (pDimensionRegions[i]->DimensionUpperLimits[veldim] || |
3197 |
pDimensionRegions[i]->VelocityUpperLimit) { |
pDimensionRegions[i]->VelocityUpperLimit) { |
3198 |
// create the velocity table |
// create the velocity table |
3223 |
} |
} |
3224 |
} |
} |
3225 |
|
|
3226 |
|
// jump to the next case where the velocity zone is zero |
3227 |
int j; |
int j; |
3228 |
int shift = 0; |
int shift = 0; |
3229 |
for (j = 0 ; j < Dimensions ; j++) { |
for (j = 0 ; j < Dimensions ; j++) { |
3798 |
DimensionRegion* Region::GetDimensionRegionByValue(const uint DimValues[8]) { |
DimensionRegion* Region::GetDimensionRegionByValue(const uint DimValues[8]) { |
3799 |
uint8_t bits; |
uint8_t bits; |
3800 |
int veldim = -1; |
int veldim = -1; |
3801 |
int velbitpos; |
int velbitpos = 0; |
3802 |
int bitpos = 0; |
int bitpos = 0; |
3803 |
int dimregidx = 0; |
int dimregidx = 0; |
3804 |
for (uint i = 0; i < Dimensions; i++) { |
for (uint i = 0; i < Dimensions; i++) { |
3847 |
int Region::GetDimensionRegionIndexByValue(const uint DimValues[8]) { |
int Region::GetDimensionRegionIndexByValue(const uint DimValues[8]) { |
3848 |
uint8_t bits; |
uint8_t bits; |
3849 |
int veldim = -1; |
int veldim = -1; |
3850 |
int velbitpos; |
int velbitpos = 0; |
3851 |
int bitpos = 0; |
int bitpos = 0; |
3852 |
int dimregidx = 0; |
int dimregidx = 0; |
3853 |
for (uint i = 0; i < Dimensions; i++) { |
for (uint i = 0; i < Dimensions; i++) { |
4196 |
// to handle potential future extensions of the header |
// to handle potential future extensions of the header |
4197 |
ckScri->SetPos(sizeof(int32_t) + headerSize); |
ckScri->SetPos(sizeof(int32_t) + headerSize); |
4198 |
// read actual script data |
// read actual script data |
4199 |
uint32_t scriptSize = ckScri->GetSize() - ckScri->GetPos(); |
uint32_t scriptSize = uint32_t(ckScri->GetSize() - ckScri->GetPos()); |
4200 |
data.resize(scriptSize); |
data.resize(scriptSize); |
4201 |
for (int i = 0; i < scriptSize; ++i) |
for (int i = 0; i < scriptSize; ++i) |
4202 |
data[i] = ckScri->ReadUint8(); |
data[i] = ckScri->ReadUint8(); |
4247 |
// recalculate CRC32 check sum |
// recalculate CRC32 check sum |
4248 |
__resetCRC(crc); |
__resetCRC(crc); |
4249 |
__calculateCRC(&data[0], data.size(), crc); |
__calculateCRC(&data[0], data.size(), crc); |
4250 |
__encodeCRC(crc); |
__finalizeCRC(crc); |
4251 |
// make sure chunk exists and has the required size |
// make sure chunk exists and has the required size |
4252 |
const int chunkSize = 7*sizeof(int32_t) + Name.size() + data.size(); |
const file_offset_t chunkSize = (file_offset_t) 7*sizeof(int32_t) + Name.size() + data.size(); |
4253 |
if (!pChunk) pChunk = pGroup->pList->AddSubChunk(CHUNK_ID_SCRI, chunkSize); |
if (!pChunk) pChunk = pGroup->pList->AddSubChunk(CHUNK_ID_SCRI, chunkSize); |
4254 |
else pChunk->Resize(chunkSize); |
else pChunk->Resize(chunkSize); |
4255 |
// fill the chunk data to be written to disk |
// fill the chunk data to be written to disk |
4256 |
uint8_t* pData = (uint8_t*) pChunk->LoadChunkData(); |
uint8_t* pData = (uint8_t*) pChunk->LoadChunkData(); |
4257 |
int pos = 0; |
int pos = 0; |
4258 |
store32(&pData[pos], 6*sizeof(int32_t) + Name.size()); // total header size |
store32(&pData[pos], uint32_t(6*sizeof(int32_t) + Name.size())); // total header size |
4259 |
pos += sizeof(int32_t); |
pos += sizeof(int32_t); |
4260 |
store32(&pData[pos], Compression); |
store32(&pData[pos], Compression); |
4261 |
pos += sizeof(int32_t); |
pos += sizeof(int32_t); |
4267 |
pos += sizeof(int32_t); |
pos += sizeof(int32_t); |
4268 |
store32(&pData[pos], crc); |
store32(&pData[pos], crc); |
4269 |
pos += sizeof(int32_t); |
pos += sizeof(int32_t); |
4270 |
store32(&pData[pos], Name.size()); |
store32(&pData[pos], (uint32_t) Name.size()); |
4271 |
pos += sizeof(int32_t); |
pos += sizeof(int32_t); |
4272 |
for (int i = 0; i < Name.size(); ++i, ++pos) |
for (int i = 0; i < Name.size(); ++i, ++pos) |
4273 |
pData[pos] = Name[i]; |
pData[pos] = Name[i]; |
4444 |
EffectSend = 0; |
EffectSend = 0; |
4445 |
Attenuation = 0; |
Attenuation = 0; |
4446 |
FineTune = 0; |
FineTune = 0; |
4447 |
PitchbendRange = 0; |
PitchbendRange = 2; |
4448 |
PianoReleaseMode = false; |
PianoReleaseMode = false; |
4449 |
DimensionKeyRange.low = 0; |
DimensionKeyRange.low = 0; |
4450 |
DimensionKeyRange.high = 0; |
DimensionKeyRange.high = 0; |
4619 |
|
|
4620 |
RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS); |
RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS); |
4621 |
if (!lst3LS) lst3LS = pCkInstrument->AddSubList(LIST_TYPE_3LS); |
if (!lst3LS) lst3LS = pCkInstrument->AddSubList(LIST_TYPE_3LS); |
4622 |
const int slotCount = pScriptRefs->size(); |
const int slotCount = (int) pScriptRefs->size(); |
4623 |
const int headerSize = 3 * sizeof(uint32_t); |
const int headerSize = 3 * sizeof(uint32_t); |
4624 |
const int slotSize = 2 * sizeof(uint32_t); |
const int slotSize = 2 * sizeof(uint32_t); |
4625 |
const int totalChunkSize = headerSize + slotCount * slotSize; |
const int totalChunkSize = headerSize + slotCount * slotSize; |
4655 |
if (pScriptRefs && pScriptRefs->size() > 0) { |
if (pScriptRefs && pScriptRefs->size() > 0) { |
4656 |
RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS); |
RIFF::List* lst3LS = pCkInstrument->GetSubList(LIST_TYPE_3LS); |
4657 |
RIFF::Chunk* ckSCSL = lst3LS->GetSubChunk(CHUNK_ID_SCSL); |
RIFF::Chunk* ckSCSL = lst3LS->GetSubChunk(CHUNK_ID_SCSL); |
4658 |
const int slotCount = pScriptRefs->size(); |
const int slotCount = (int) pScriptRefs->size(); |
4659 |
const int headerSize = 3 * sizeof(uint32_t); |
const int headerSize = 3 * sizeof(uint32_t); |
4660 |
ckSCSL->SetPos(headerSize); |
ckSCSL->SetPos(headerSize); |
4661 |
for (int i = 0; i < slotCount; ++i) { |
for (int i = 0; i < slotCount; ++i) { |
4662 |
uint32_t fileOffset = |
uint32_t fileOffset = uint32_t( |
4663 |
(*pScriptRefs)[i].script->pChunk->GetFilePos() - |
(*pScriptRefs)[i].script->pChunk->GetFilePos() - |
4664 |
(*pScriptRefs)[i].script->pChunk->GetPos() - |
(*pScriptRefs)[i].script->pChunk->GetPos() - |
4665 |
CHUNK_HEADER_SIZE(ckSCSL->GetFile()->GetFileOffsetSize()); |
CHUNK_HEADER_SIZE(ckSCSL->GetFile()->GetFileOffsetSize()) |
4666 |
|
); |
4667 |
ckSCSL->WriteUint32(&fileOffset); |
ckSCSL->WriteUint32(&fileOffset); |
4668 |
// jump over flags entry (containing the bypass flag) |
// jump over flags entry (containing the bypass flag) |
4669 |
ckSCSL->SetPos(sizeof(uint32_t), RIFF::stream_curpos); |
ckSCSL->SetPos(sizeof(uint32_t), RIFF::stream_curpos); |
4723 |
RIFF::List* rgn = lrgn->AddSubList(LIST_TYPE_RGN); |
RIFF::List* rgn = lrgn->AddSubList(LIST_TYPE_RGN); |
4724 |
Region* pNewRegion = new Region(this, rgn); |
Region* pNewRegion = new Region(this, rgn); |
4725 |
pRegions->push_back(pNewRegion); |
pRegions->push_back(pNewRegion); |
4726 |
Regions = pRegions->size(); |
Regions = (uint32_t) pRegions->size(); |
4727 |
// update Region key table for fast lookup |
// update Region key table for fast lookup |
4728 |
UpdateRegionKeyTable(); |
UpdateRegionKeyTable(); |
4729 |
// done |
// done |
4869 |
for (uint s = 0; group->GetScript(s); ++s) { |
for (uint s = 0; group->GetScript(s); ++s) { |
4870 |
Script* script = group->GetScript(s); |
Script* script = group->GetScript(s); |
4871 |
if (script->pChunk) { |
if (script->pChunk) { |
4872 |
uint32_t offset = script->pChunk->GetFilePos() - |
uint32_t offset = uint32_t( |
4873 |
script->pChunk->GetPos() - |
script->pChunk->GetFilePos() - |
4874 |
CHUNK_HEADER_SIZE(script->pChunk->GetFile()->GetFileOffsetSize()); |
script->pChunk->GetPos() - |
4875 |
|
CHUNK_HEADER_SIZE(script->pChunk->GetFile()->GetFileOffsetSize()) |
4876 |
|
); |
4877 |
if (offset == soughtOffset) |
if (offset == soughtOffset) |
4878 |
{ |
{ |
4879 |
_ScriptPooolRef ref; |
_ScriptPooolRef ref; |
4998 |
*/ |
*/ |
4999 |
void Instrument::RemoveScript(Script* pScript) { |
void Instrument::RemoveScript(Script* pScript) { |
5000 |
LoadScripts(); |
LoadScripts(); |
5001 |
for (int i = pScriptRefs->size() - 1; i >= 0; --i) { |
for (ssize_t i = pScriptRefs->size() - 1; i >= 0; --i) { |
5002 |
if ((*pScriptRefs)[i].script == pScript) { |
if ((*pScriptRefs)[i].script == pScript) { |
5003 |
pScriptRefs->erase( pScriptRefs->begin() + i ); |
pScriptRefs->erase( pScriptRefs->begin() + i ); |
5004 |
} |
} |
5020 |
* gigedit. |
* gigedit. |
5021 |
*/ |
*/ |
5022 |
uint Instrument::ScriptSlotCount() const { |
uint Instrument::ScriptSlotCount() const { |
5023 |
return pScriptRefs ? pScriptRefs->size() : scriptPoolFileOffsets.size(); |
return uint(pScriptRefs ? pScriptRefs->size() : scriptPoolFileOffsets.size()); |
5024 |
} |
} |
5025 |
|
|
5026 |
/** @brief Whether script execution shall be skipped. |
/** @brief Whether script execution shall be skipped. |
5444 |
} |
} |
5445 |
} |
} |
5446 |
String name(pRIFF->GetFileName()); |
String name(pRIFF->GetFileName()); |
5447 |
int nameLen = name.length(); |
int nameLen = (int) name.length(); |
5448 |
char suffix[6]; |
char suffix[6]; |
5449 |
if (nameLen > 4 && name.substr(nameLen - 4) == ".gig") nameLen -= 4; |
if (nameLen > 4 && name.substr(nameLen - 4) == ".gig") nameLen -= 4; |
5450 |
|
|
5460 |
__notify_progress(pProgress, subprogress); |
__notify_progress(pProgress, subprogress); |
5461 |
|
|
5462 |
file_offset_t waveFileOffset = wave->GetFilePos(); |
file_offset_t waveFileOffset = wave->GetFilePos(); |
5463 |
pSamples->push_back(new Sample(this, wave, waveFileOffset - wvplFileOffset, fileNo)); |
pSamples->push_back(new Sample(this, wave, waveFileOffset - wvplFileOffset, fileNo, iSampleIndex)); |
5464 |
|
|
5465 |
iSampleIndex++; |
iSampleIndex++; |
5466 |
} |
} |
5698 |
if (!_3crc) return; |
if (!_3crc) return; |
5699 |
|
|
5700 |
// get the index of the sample |
// get the index of the sample |
5701 |
int iWaveIndex = -1; |
int iWaveIndex = GetWaveTableIndexOf(pSample); |
|
File::SampleList::iterator iter = pSamples->begin(); |
|
|
File::SampleList::iterator end = pSamples->end(); |
|
|
for (int index = 0; iter != end; ++iter, ++index) { |
|
|
if (*iter == pSample) { |
|
|
iWaveIndex = index; |
|
|
break; |
|
|
} |
|
|
} |
|
5702 |
if (iWaveIndex < 0) throw gig::Exception("Could not update crc, could not find sample"); |
if (iWaveIndex < 0) throw gig::Exception("Could not update crc, could not find sample"); |
5703 |
|
|
5704 |
// write the CRC-32 checksum to disk |
// write the CRC-32 checksum to disk |
5705 |
_3crc->SetPos(iWaveIndex * 8); |
_3crc->SetPos(iWaveIndex * 8); |
5706 |
uint32_t tmp = 1; |
uint32_t one = 1; |
5707 |
_3crc->WriteUint32(&tmp); // unknown, always 1? |
_3crc->WriteUint32(&one); // always 1 |
5708 |
_3crc->WriteUint32(&crc); |
_3crc->WriteUint32(&crc); |
5709 |
} |
} |
5710 |
|
|
5711 |
|
uint32_t File::GetSampleChecksum(Sample* pSample) { |
5712 |
|
// get the index of the sample |
5713 |
|
int iWaveIndex = GetWaveTableIndexOf(pSample); |
5714 |
|
if (iWaveIndex < 0) throw gig::Exception("Could not retrieve reference crc of sample, could not resolve sample's wave table index"); |
5715 |
|
|
5716 |
|
return GetSampleChecksumByIndex(iWaveIndex); |
5717 |
|
} |
5718 |
|
|
5719 |
|
uint32_t File::GetSampleChecksumByIndex(int index) { |
5720 |
|
if (index < 0) throw gig::Exception("Could not retrieve reference crc of sample, invalid wave pool index of sample"); |
5721 |
|
|
5722 |
|
RIFF::Chunk* _3crc = pRIFF->GetSubChunk(CHUNK_ID_3CRC); |
5723 |
|
if (!_3crc) throw gig::Exception("Could not retrieve reference crc of sample, no checksums stored for this file yet"); |
5724 |
|
uint8_t* pData = (uint8_t*) _3crc->LoadChunkData(); |
5725 |
|
if (!pData) throw gig::Exception("Could not retrieve reference crc of sample, no checksums stored for this file yet"); |
5726 |
|
|
5727 |
|
// read the CRC-32 checksum directly from disk |
5728 |
|
size_t pos = index * 8; |
5729 |
|
if (pos + 8 > _3crc->GetNewSize()) |
5730 |
|
throw gig::Exception("Could not retrieve reference crc of sample, could not seek to required position in crc chunk"); |
5731 |
|
|
5732 |
|
uint32_t one = load32(&pData[pos]); // always 1 |
5733 |
|
if (one != 1) |
5734 |
|
throw gig::Exception("Could not retrieve reference crc of sample, because reference checksum table is damaged"); |
5735 |
|
|
5736 |
|
return load32(&pData[pos+4]); |
5737 |
|
} |
5738 |
|
|
5739 |
|
int File::GetWaveTableIndexOf(gig::Sample* pSample) { |
5740 |
|
if (!pSamples) GetFirstSample(); // make sure sample chunks were scanned |
5741 |
|
File::SampleList::iterator iter = pSamples->begin(); |
5742 |
|
File::SampleList::iterator end = pSamples->end(); |
5743 |
|
for (int index = 0; iter != end; ++iter, ++index) |
5744 |
|
if (*iter == pSample) |
5745 |
|
return index; |
5746 |
|
return -1; |
5747 |
|
} |
5748 |
|
|
5749 |
|
/** |
5750 |
|
* Checks whether the file's "3CRC" chunk was damaged. This chunk contains |
5751 |
|
* the CRC32 check sums of all samples' raw wave data. |
5752 |
|
* |
5753 |
|
* @return true if 3CRC chunk is OK, or false if 3CRC chunk is damaged |
5754 |
|
*/ |
5755 |
|
bool File::VerifySampleChecksumTable() { |
5756 |
|
RIFF::Chunk* _3crc = pRIFF->GetSubChunk(CHUNK_ID_3CRC); |
5757 |
|
if (!_3crc) return false; |
5758 |
|
if (_3crc->GetNewSize() <= 0) return false; |
5759 |
|
if (_3crc->GetNewSize() % 8) return false; |
5760 |
|
if (!pSamples) GetFirstSample(); // make sure sample chunks were scanned |
5761 |
|
if (_3crc->GetNewSize() != pSamples->size() * 8) return false; |
5762 |
|
|
5763 |
|
const file_offset_t n = _3crc->GetNewSize() / 8; |
5764 |
|
|
5765 |
|
uint32_t* pData = (uint32_t*) _3crc->LoadChunkData(); |
5766 |
|
if (!pData) return false; |
5767 |
|
|
5768 |
|
for (file_offset_t i = 0; i < n; ++i) { |
5769 |
|
uint32_t one = pData[i*2]; |
5770 |
|
if (one != 1) return false; |
5771 |
|
} |
5772 |
|
|
5773 |
|
return true; |
5774 |
|
} |
5775 |
|
|
5776 |
|
/** |
5777 |
|
* Recalculates CRC32 checksums for all samples and rebuilds this gig |
5778 |
|
* file's checksum table with those new checksums. This might usually |
5779 |
|
* just be necessary if the checksum table was damaged. |
5780 |
|
* |
5781 |
|
* @e IMPORTANT: The current implementation of this method only works |
5782 |
|
* with files that have not been modified since it was loaded, because |
5783 |
|
* it expects that no externally caused file structure changes are |
5784 |
|
* required! |
5785 |
|
* |
5786 |
|
* Due to the expectation above, this method is currently protected |
5787 |
|
* and actually only used by the command line tool "gigdump" yet. |
5788 |
|
* |
5789 |
|
* @returns true if Save() is required to be called after this call, |
5790 |
|
* false if no further action is required |
5791 |
|
*/ |
5792 |
|
bool File::RebuildSampleChecksumTable() { |
5793 |
|
// make sure sample chunks were scanned |
5794 |
|
if (!pSamples) GetFirstSample(); |
5795 |
|
|
5796 |
|
bool bRequiresSave = false; |
5797 |
|
|
5798 |
|
// make sure "3CRC" chunk exists with required size |
5799 |
|
RIFF::Chunk* _3crc = pRIFF->GetSubChunk(CHUNK_ID_3CRC); |
5800 |
|
if (!_3crc) { |
5801 |
|
_3crc = pRIFF->AddSubChunk(CHUNK_ID_3CRC, pSamples->size() * 8); |
5802 |
|
// the order of einf and 3crc is not the same in v2 and v3 |
5803 |
|
RIFF::Chunk* einf = pRIFF->GetSubChunk(CHUNK_ID_EINF); |
5804 |
|
if (einf && pVersion && pVersion->major == 3) pRIFF->MoveSubChunk(_3crc, einf); |
5805 |
|
bRequiresSave = true; |
5806 |
|
} else if (_3crc->GetNewSize() != pSamples->size() * 8) { |
5807 |
|
_3crc->Resize(pSamples->size() * 8); |
5808 |
|
bRequiresSave = true; |
5809 |
|
} |
5810 |
|
|
5811 |
|
if (bRequiresSave) { // refill CRC table for all samples in RAM ... |
5812 |
|
uint32_t* pData = (uint32_t*) _3crc->LoadChunkData(); |
5813 |
|
{ |
5814 |
|
File::SampleList::iterator iter = pSamples->begin(); |
5815 |
|
File::SampleList::iterator end = pSamples->end(); |
5816 |
|
for (; iter != end; ++iter) { |
5817 |
|
gig::Sample* pSample = (gig::Sample*) *iter; |
5818 |
|
int index = GetWaveTableIndexOf(pSample); |
5819 |
|
if (index < 0) throw gig::Exception("Could not rebuild crc table for samples, wave table index of a sample could not be resolved"); |
5820 |
|
pData[index*2] = 1; // always 1 |
5821 |
|
pData[index*2+1] = pSample->CalculateWaveDataChecksum(); |
5822 |
|
} |
5823 |
|
} |
5824 |
|
} else { // no file structure changes necessary, so directly write to disk and we are done ... |
5825 |
|
// make sure file is in write mode |
5826 |
|
pRIFF->SetMode(RIFF::stream_mode_read_write); |
5827 |
|
{ |
5828 |
|
File::SampleList::iterator iter = pSamples->begin(); |
5829 |
|
File::SampleList::iterator end = pSamples->end(); |
5830 |
|
for (; iter != end; ++iter) { |
5831 |
|
gig::Sample* pSample = (gig::Sample*) *iter; |
5832 |
|
int index = GetWaveTableIndexOf(pSample); |
5833 |
|
if (index < 0) throw gig::Exception("Could not rebuild crc table for samples, wave table index of a sample could not be resolved"); |
5834 |
|
pSample->crc = pSample->CalculateWaveDataChecksum(); |
5835 |
|
SetSampleChecksum(pSample, pSample->crc); |
5836 |
|
} |
5837 |
|
} |
5838 |
|
} |
5839 |
|
|
5840 |
|
return bRequiresSave; |
5841 |
|
} |
5842 |
|
|
5843 |
Group* File::GetFirstGroup() { |
Group* File::GetFirstGroup() { |
5844 |
if (!pGroups) LoadGroups(); |
if (!pGroups) LoadGroups(); |
5845 |
// there must always be at least one group |
// there must always be at least one group |
6157 |
// Note that there are several fields with unknown use. These |
// Note that there are several fields with unknown use. These |
6158 |
// are set to zero. |
// are set to zero. |
6159 |
|
|
6160 |
int sublen = pSamples->size() / 8 + 49; |
int sublen = int(pSamples->size() / 8 + 49); |
6161 |
int einfSize = (Instruments + 1) * sublen; |
int einfSize = (Instruments + 1) * sublen; |
6162 |
|
|
6163 |
RIFF::Chunk* einf = pRIFF->GetSubChunk(CHUNK_ID_EINF); |
RIFF::Chunk* einf = pRIFF->GetSubChunk(CHUNK_ID_EINF); |
6230 |
store32(&pData[(instrumentIdx + 1) * sublen + 24], nbloops); |
store32(&pData[(instrumentIdx + 1) * sublen + 24], nbloops); |
6231 |
// next 8 bytes unknown |
// next 8 bytes unknown |
6232 |
store32(&pData[(instrumentIdx + 1) * sublen + 36], instrumentIdx); |
store32(&pData[(instrumentIdx + 1) * sublen + 36], instrumentIdx); |
6233 |
store32(&pData[(instrumentIdx + 1) * sublen + 40], pSamples->size()); |
store32(&pData[(instrumentIdx + 1) * sublen + 40], (uint32_t) pSamples->size()); |
6234 |
// next 4 bytes unknown |
// next 4 bytes unknown |
6235 |
|
|
6236 |
totnbregions += instrument->Regions; |
totnbregions += instrument->Regions; |
6248 |
store32(&pData[24], totnbloops); |
store32(&pData[24], totnbloops); |
6249 |
// next 8 bytes unknown |
// next 8 bytes unknown |
6250 |
// next 4 bytes unknown, not always 0 |
// next 4 bytes unknown, not always 0 |
6251 |
store32(&pData[40], pSamples->size()); |
store32(&pData[40], (uint32_t) pSamples->size()); |
6252 |
// next 4 bytes unknown |
// next 4 bytes unknown |
6253 |
} |
} |
6254 |
|
|
6255 |
// update 3crc chunk |
// update 3crc chunk |
6256 |
|
|
6257 |
// The 3crc chunk contains CRC-32 checksums for the |
// The 3crc chunk contains CRC-32 checksums for the |
6258 |
// samples. The actual checksum values will be filled in |
// samples. When saving a gig file to disk, we first update the 3CRC |
6259 |
// later, by Sample::Write. |
// chunk here (in RAM) with the old crc values which we read from the |
6260 |
|
// 3CRC chunk when we opened the file (available with gig::Sample::crc |
6261 |
|
// member variable). This step is required, because samples might have |
6262 |
|
// been deleted by the user since the file was opened, which in turn |
6263 |
|
// changes the order of the (i.e. old) checksums within the 3crc chunk. |
6264 |
|
// If a sample was conciously modified by the user (that is if |
6265 |
|
// Sample::Write() was called later on) then Sample::Write() will just |
6266 |
|
// update the respective individual checksum(s) directly on disk and |
6267 |
|
// leaves all other sample checksums untouched. |
6268 |
|
|
6269 |
RIFF::Chunk* _3crc = pRIFF->GetSubChunk(CHUNK_ID_3CRC); |
RIFF::Chunk* _3crc = pRIFF->GetSubChunk(CHUNK_ID_3CRC); |
6270 |
if (_3crc) { |
if (_3crc) { |
6271 |
_3crc->Resize(pSamples->size() * 8); |
_3crc->Resize(pSamples->size() * 8); |
6272 |
} else if (newFile) { |
} else /*if (newFile)*/ { |
6273 |
_3crc = pRIFF->AddSubChunk(CHUNK_ID_3CRC, pSamples->size() * 8); |
_3crc = pRIFF->AddSubChunk(CHUNK_ID_3CRC, pSamples->size() * 8); |
|
_3crc->LoadChunkData(); |
|
|
|
|
6274 |
// the order of einf and 3crc is not the same in v2 and v3 |
// the order of einf and 3crc is not the same in v2 and v3 |
6275 |
if (einf && pVersion && pVersion->major == 3) pRIFF->MoveSubChunk(_3crc, einf); |
if (einf && pVersion && pVersion->major == 3) pRIFF->MoveSubChunk(_3crc, einf); |
6276 |
} |
} |
6277 |
|
{ // must be performed in RAM here ... |
6278 |
|
uint32_t* pData = (uint32_t*) _3crc->LoadChunkData(); |
6279 |
|
if (pData) { |
6280 |
|
File::SampleList::iterator iter = pSamples->begin(); |
6281 |
|
File::SampleList::iterator end = pSamples->end(); |
6282 |
|
for (int index = 0; iter != end; ++iter, ++index) { |
6283 |
|
gig::Sample* pSample = (gig::Sample*) *iter; |
6284 |
|
pData[index*2] = 1; // always 1 |
6285 |
|
pData[index*2+1] = pSample->crc; |
6286 |
|
} |
6287 |
|
} |
6288 |
|
} |
6289 |
} |
} |
6290 |
|
|
6291 |
void File::UpdateFileOffsets() { |
void File::UpdateFileOffsets() { |