BlockArray *WaveTrack::Blockify(sampleType * buffer, sampleCount len)
{
BlockArray *list = new BlockArray();
list->Alloc(10);
if (len == 0)
return list;
int num = (len + (maxSamples - 1)) / maxSamples;
for (int i = 0; i < num; i++) {
WaveBlock *b = NewInitedWaveBlock();
b->start = i * len / num;
b->len = ((i + 1) * len / num) - b->start;
FirstWrite(&buffer[b->start], b, b->len);
list->Add(b);
}
return list;
}
BlockArray *Sequence::Blockify(samplePtr buffer, sampleCount len)
{
BlockArray *list = new BlockArray();
list->Alloc(10);
if (len == 0)
return list;
int num = (len + (mMaxSamples - 1)) / mMaxSamples;
for (int i = 0; i < num; i++) {
SeqBlock *b = new SeqBlock();
b->start = i * len / num;
int newLen = ((i + 1) * len / num) - b->start;
samplePtr bufStart = buffer + (b->start * SAMPLE_SIZE(mSampleFormat));
b->f = mDirManager->NewSimpleBlockFile(bufStart, newLen, mSampleFormat);
list->Add(b);
}
return list;
}
BlockArray *Sequence::Blockify(samplePtr buffer, sampleCount len)
{
BlockArray *list = new BlockArray();
list->Alloc(10);
if (len == 0)
return list;
int num = (len + (mMaxSamples - 1)) / mMaxSamples;
for (int i = 0; i < num; i++) {
SeqBlock *b = NewInitedSeqBlock();
b->start = i * len / num;
b->len = ((i + 1) * len / num) - b->start;
FirstWrite(buffer + (b->start * SAMPLE_SIZE(mSampleFormat)),
b, b->len);
list->Add(b);
}
return list;
}
bool Sequence::Paste(sampleCount s, const Sequence *src)
{
if (s < 0)
s = 0;
if (s >= mNumSamples)
s = mNumSamples;
// Quick check to make sure that it doesn't overflow
if (((double)mNumSamples) + ((double)src->mNumSamples) > wxLL(9223372036854775807))
return false;
BlockArray *srcBlock = src->mBlock;
sampleCount addedLen = src->mNumSamples;
unsigned int srcNumBlocks = srcBlock->Count();
int sampleSize = SAMPLE_SIZE(mSampleFormat);
if (addedLen == 0 || srcNumBlocks == 0)
return true;
unsigned int b = FindBlock(s);
unsigned int numBlocks = mBlock->Count();
if (numBlocks == 0 ||
(s == mNumSamples && mBlock->Item(numBlocks-1)->f->GetLength() >= mMinSamples)) {
// Special case: this track is currently empty, or it's safe to append
// onto the end because the current last block is longer than the
// minimum size
for (unsigned int i = 0; i < srcNumBlocks; i++)
AppendBlock(srcBlock->Item(i));
return ConsistencyCheck(wxT("Paste branch one"));
}
if (b >= 0 && b < numBlocks
&& mBlock->Item(b)->f->GetLength() + addedLen < mMaxSamples) {
// Special case: we can fit all of the new samples inside of
// one block!
samplePtr buffer = NewSamples(mMaxSamples, mSampleFormat);
int splitPoint = s - mBlock->Item(b)->start;
Read(buffer, mSampleFormat, mBlock->Item(b), 0, splitPoint);
src->Get(buffer + splitPoint*sampleSize,
mSampleFormat, 0, addedLen);
Read(buffer + (splitPoint + addedLen)*sampleSize,
mSampleFormat, mBlock->Item(b),
splitPoint, mBlock->Item(b)->f->GetLength() - splitPoint);
SeqBlock *largerBlock = new SeqBlock();
largerBlock->start = mBlock->Item(b)->start;
int largerBlockLen = mBlock->Item(b)->f->GetLength() + addedLen;
if (largerBlockLen > mMaxSamples)
largerBlockLen = mMaxSamples; // Prevent overruns, per NGS report for UmixIt.
largerBlock->f =
mDirManager->NewSimpleBlockFile(buffer, largerBlockLen, mSampleFormat);
mDirManager->Deref(mBlock->Item(b)->f);
delete mBlock->Item(b);
mBlock->Item(b) = largerBlock;
for (unsigned int i = b + 1; i < numBlocks; i++)
mBlock->Item(i)->start += addedLen;
mNumSamples += addedLen;
DeleteSamples(buffer);
return ConsistencyCheck(wxT("Paste branch two"));
}
// Case two: if we are inserting four or fewer blocks,
// it's simplest to just lump all the data together
// into one big block along with the split block,
// then resplit it all
unsigned int i;
BlockArray *newBlock = new BlockArray();
newBlock->Alloc(numBlocks + srcNumBlocks + 2);
int newNumBlocks = 0;
for (i = 0; i < b; i++) {
newBlock->Add(mBlock->Item(i));
newNumBlocks++;
}
SeqBlock *splitBlock = mBlock->Item(b);
sampleCount splitLen = mBlock->Item(b)->f->GetLength();
int splitPoint = s - splitBlock->start;
if (srcNumBlocks <= 4) {
sampleCount sum = splitLen + addedLen;
samplePtr sumBuffer = NewSamples(sum, mSampleFormat);
Read(sumBuffer, mSampleFormat, splitBlock, 0, splitPoint);
src->Get(sumBuffer + splitPoint * sampleSize,
mSampleFormat,
0, addedLen);
Read(sumBuffer + (splitPoint + addedLen) * sampleSize, mSampleFormat,
splitBlock, splitPoint,
splitBlock->f->GetLength() - splitPoint);
BlockArray *split = Blockify(sumBuffer, sum);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += splitBlock->start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
DeleteSamples(sumBuffer);
} else {
// The final case is that we're inserting at least five blocks.
// We divide these into three groups: the first two get merged
// with the first half of the split block, the middle ones get
// copied in as is, and the last two get merged with the last
// half of the split block.
sampleCount srcFirstTwoLen =
srcBlock->Item(0)->f->GetLength() + srcBlock->Item(1)->f->GetLength();
sampleCount leftLen = splitPoint + srcFirstTwoLen;
samplePtr leftBuffer = NewSamples(leftLen, mSampleFormat);
Read(leftBuffer, mSampleFormat, splitBlock, 0, splitPoint);
src->Get(leftBuffer + splitPoint*sampleSize,
mSampleFormat, 0, srcFirstTwoLen);
BlockArray *split = Blockify(leftBuffer, leftLen);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += splitBlock->start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
DeleteSamples(leftBuffer);
for (i = 2; i < srcNumBlocks - 2; i++) {
SeqBlock *insertBlock = new SeqBlock();
insertBlock->start = srcBlock->Item(i)->start + s;
insertBlock->f = mDirManager->CopyBlockFile(srcBlock->Item(i)->f);
if (!insertBlock->f) {
// TODO error: Could not paste! (Out of disk space?)
return false;
}
newBlock->Add(insertBlock);
newNumBlocks++;
}
sampleCount srcLastTwoLen =
srcBlock->Item(srcNumBlocks - 2)->f->GetLength() +
srcBlock->Item(srcNumBlocks - 1)->f->GetLength();
sampleCount rightSplit = splitBlock->f->GetLength() - splitPoint;
sampleCount rightLen = rightSplit + srcLastTwoLen;
samplePtr rightBuffer = NewSamples(rightLen, mSampleFormat);
sampleCount lastStart = srcBlock->Item(srcNumBlocks - 2)->start;
src->Get(rightBuffer, mSampleFormat,
lastStart, srcLastTwoLen);
Read(rightBuffer + srcLastTwoLen * sampleSize, mSampleFormat,
splitBlock, splitPoint, rightSplit);
sampleCount pos = s + lastStart;
split = Blockify(rightBuffer, rightLen);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += pos;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
DeleteSamples(rightBuffer);
}
mDirManager->Deref(splitBlock->f);
delete splitBlock;
// Copy remaining blocks to new block array and
// swap the new block array in for the old
for (i = b + 1; i < numBlocks; i++) {
mBlock->Item(i)->start += addedLen;
newBlock->Add(mBlock->Item(i));
newNumBlocks++;
}
delete mBlock;
mBlock = newBlock;
mNumSamples += addedLen;
return ConsistencyCheck(wxT("Paste branch three"));
}
bool Sequence::Delete(sampleCount start, sampleCount len)
{
if (len == 0)
return true;
if (len < 0 || start < 0 || start >= mNumSamples)
return false;
//TODO: add a ref-deref mechanism to SeqBlock/BlockArray so we don't have to make this a critical section.
//On-demand threads iterate over the mBlocks and the GUI thread deletes them, so for now put a mutex here over
//both functions,
LockDeleteUpdateMutex();
unsigned int numBlocks = mBlock->Count();
unsigned int newNumBlocks = 0;
unsigned int b0 = FindBlock(start);
unsigned int b1 = FindBlock(start + len - 1);
int sampleSize = SAMPLE_SIZE(mSampleFormat);
// Special case: if the samples to delete are all within a single
// block and the resulting length is not too small, perform the
// deletion within this block:
if (b0 == b1 && mBlock->Item(b0)->f->GetLength() - len >= mMinSamples) {
SeqBlock *b = mBlock->Item(b0);
sampleCount pos = start - b->start;
sampleCount newLen = b->f->GetLength() - len;
samplePtr buffer = NewSamples(newLen, mSampleFormat);
Read(buffer, mSampleFormat, b, 0, pos);
Read(buffer + (pos * sampleSize), mSampleFormat,
b, pos + len, newLen - pos);
SeqBlock *newBlock = new SeqBlock();
newBlock->start = b->start;
newBlock->f =
mDirManager->NewSimpleBlockFile(buffer, newLen, mSampleFormat);
mBlock->Item(b0) = newBlock;
for (unsigned int j = b0 + 1; j < numBlocks; j++)
mBlock->Item(j)->start -= len;
DeleteSamples(buffer);
mDirManager->Deref(b->f);
delete b;
mNumSamples -= len;
UnlockDeleteUpdateMutex();
return ConsistencyCheck(wxT("Delete - branch one"));
}
// Create a new array of blocks
BlockArray *newBlock = new BlockArray();
newBlock->Alloc(numBlocks - (b1 - b0) + 2);
// Copy the blocks before the deletion point over to
// the new array
unsigned int i;
for (i = 0; i < b0; i++) {
newBlock->Add(mBlock->Item(i));
newNumBlocks++;
}
// First grab the samples in block b0 before the deletion point
// into preBuffer. If this is enough samples for its own block,
// or if this would be the first block in the array, write it out.
// Otherwise combine it with the previous block (splitting them
// 50/50 if necessary).
SeqBlock *preBlock = mBlock->Item(b0);
sampleCount preBufferLen = start - preBlock->start;
if (preBufferLen) {
if (preBufferLen >= mMinSamples || b0 == 0) {
SeqBlock *insBlock = new SeqBlock();
insBlock->start = preBlock->start;
samplePtr preBuffer = NewSamples(preBufferLen, mSampleFormat);
Read(preBuffer, mSampleFormat, preBlock, 0, preBufferLen);
insBlock->f =
mDirManager->NewSimpleBlockFile(preBuffer, preBufferLen, mSampleFormat);
DeleteSamples(preBuffer);
newBlock->Add(insBlock);
newNumBlocks++;
if (b0 != b1) {
mDirManager->Deref(preBlock->f);
delete preBlock;
}
} else {
SeqBlock *prepreBlock = mBlock->Item(b0 - 1);
sampleCount prepreLen = prepreBlock->f->GetLength();
sampleCount sum = prepreLen + preBufferLen;
samplePtr sumBuffer = NewSamples(sum, mSampleFormat);
Read(sumBuffer, mSampleFormat, prepreBlock, 0, prepreLen);
Read(sumBuffer + prepreLen*sampleSize, mSampleFormat,
preBlock, 0, preBufferLen);
BlockArray *split = Blockify(sumBuffer, sum);
split->Item(0)->start += prepreBlock->start;
newBlock->Item(b0 - 1) = split->Item(0);
for (i = 1; i < split->Count(); i++) {
split->Item(i)->start += prepreBlock->start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
DeleteSamples(sumBuffer);
mDirManager->Deref(prepreBlock->f);
delete prepreBlock;
if (b0 != b1) {
mDirManager->Deref(preBlock->f);
delete preBlock;
}
}
} else {
// The sample where we begin deletion happens to fall
// right on the beginning of a block.
if (b0 != b1) {
mDirManager->Deref(mBlock->Item(b0)->f);
delete mBlock->Item(b0);
}
}
// Next, delete blocks strictly between b0 and b1
for (i = b0 + 1; i < b1; i++) {
mDirManager->Deref(mBlock->Item(i)->f);
delete mBlock->Item(i);
}
// Now, symmetrically, grab the samples in block b1 after the
// deletion point into postBuffer. If this is enough samples
// for its own block, or if this would be the last block in
// the array, write it out. Otherwise combine it with the
// subsequent block (splitting them 50/50 if necessary).
SeqBlock *postBlock = mBlock->Item(b1);
sampleCount postBufferLen =
(postBlock->start + postBlock->f->GetLength()) - (start + len);
if (postBufferLen) {
if (postBufferLen >= mMinSamples || b1 == numBlocks - 1) {
SeqBlock *insBlock = new SeqBlock();
insBlock->start = start;
samplePtr postBuffer = NewSamples(postBufferLen, mSampleFormat);
sampleCount pos = (start + len) - postBlock->start;
Read(postBuffer, mSampleFormat, postBlock, pos, postBufferLen);
insBlock->f =
mDirManager->NewSimpleBlockFile(postBuffer, postBufferLen, mSampleFormat);
DeleteSamples(postBuffer);
newBlock->Add(insBlock);
newNumBlocks++;
mDirManager->Deref(postBlock->f);
delete postBlock;
} else {
SeqBlock *postpostBlock = mBlock->Item(b1 + 1);
sampleCount postpostLen = postpostBlock->f->GetLength();
sampleCount sum = postpostLen + postBufferLen;
samplePtr sumBuffer = NewSamples(sum, mSampleFormat);
sampleCount pos = (start + len) - postBlock->start;
Read(sumBuffer, mSampleFormat, postBlock, pos, postBufferLen);
Read(sumBuffer + (postBufferLen * sampleSize), mSampleFormat,
postpostBlock, 0, postpostLen);
BlockArray *split = Blockify(sumBuffer, sum);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
b1++;
DeleteSamples(sumBuffer);
mDirManager->Deref(postpostBlock->f);
delete postpostBlock;
mDirManager->Deref(postBlock->f);
delete postBlock;
}
} else {
// The sample where we begin deletion happens to fall
// right on the end of a block.
mDirManager->Deref(mBlock->Item(b1)->f);
delete mBlock->Item(b1);
}
// Copy the remaining blocks over from the old array
for (i = b1 + 1; i < numBlocks; i++) {
mBlock->Item(i)->start -= len;
newBlock->Add(mBlock->Item(i));
newNumBlocks++;
}
// Substitute our new array for the old one
delete mBlock;
mBlock = newBlock;
// Update total number of samples and do a consistency check.
mNumSamples -= len;
UnlockDeleteUpdateMutex();
return ConsistencyCheck(wxT("Delete - branch two"));
}
void WaveTrack::Paste(double t, VTrack * src)
{
wxASSERT(src->GetKind() == WaveTrack::Wave);
envelope.ExpandRegion(t, src->GetMaxLen());
#if wxUSE_THREADS
wxMutexLocker lock(*blockMutex);
#endif
sampleCount s = (sampleCount) ((t - tOffset) * rate + 0.5);
if (s < 0)
s = 0;
if (s >= numSamples)
s = numSamples;
BlockArray *srcBlock = ((WaveTrack *) src)->GetBlockArray();
int addedLen = ((WaveTrack *) src)->numSamples;
int srcNumBlocks = srcBlock->Count();
if (addedLen == 0 || srcNumBlocks == 0)
return;
int b = FindBlock(s);
int numBlocks = block->Count();
if (numBlocks == 0) {
// Special case: this track is currently empty.
for (int i = 0; i < srcNumBlocks; i++)
AppendBlock(srcBlock->Item(i));
envelope.SetTrackLen(numSamples / rate);
ConsistencyCheck("Paste branch one");
return;
}
if (b >= 0 && b < numBlocks
&& block->Item(b)->len + addedLen < maxSamples) {
// Special case: we can fit all of the new samples inside of
// one block!
sampleType *buffer = new sampleType[maxSamples];
int splitPoint = s - block->Item(b)->start;
Read(buffer, block->Item(b), 0, splitPoint);
((WaveTrack *) src)->Get(&buffer[splitPoint], 0, addedLen);
Read(&buffer[splitPoint + addedLen], block->Item(b),
splitPoint, block->Item(b)->len - splitPoint);
WaveBlock *largerBlock = new WaveBlock();
largerBlock->start = block->Item(b)->start;
largerBlock->len = block->Item(b)->len + addedLen;
largerBlock->f = dirManager->NewBlockFile();
bool inited = InitBlock(largerBlock);
wxASSERT(inited);
FirstWrite(buffer, largerBlock, largerBlock->len);
dirManager->Deref(block->Item(b)->f);
delete block->Item(b);
block->Item(b) = largerBlock;
for (int i = b + 1; i < numBlocks; i++)
block->Item(i)->start += addedLen;
numSamples += addedLen;
delete[]buffer;
envelope.SetTrackLen(numSamples / rate);
ConsistencyCheck("Paste branch two");
return;
}
// Case two: if we are inserting four or fewer blocks,
// it's simplest to just lump all the data together
// into one big block along with the split block,
// then resplit it all
int i;
BlockArray *newBlock = new BlockArray();
newBlock->Alloc(numBlocks + srcNumBlocks + 2);
int newNumBlocks = 0;
for (i = 0; i < b; i++) {
newBlock->Add(block->Item(i));
newNumBlocks++;
}
WaveBlock *splitBlock = block->Item(b);
sampleCount splitLen = block->Item(b)->len;
int splitPoint = s - splitBlock->start;
if (srcNumBlocks <= 4) {
sampleCount sum = splitLen + addedLen;
sampleType *sumBuffer = new sampleType[sum];
Read(sumBuffer, splitBlock, 0, splitPoint);
((WaveTrack *) src)->Get(&sumBuffer[splitPoint], 0, addedLen);
Read(&sumBuffer[splitPoint + addedLen], splitBlock,
splitPoint, splitBlock->len - splitPoint);
BlockArray *split = Blockify(sumBuffer, sum);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += splitBlock->start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
delete[]sumBuffer;
} else {
// The final case is that we're inserting at least five blocks.
// We divide these into three groups: the first two get merged
// with the first half of the split block, the middle ones get
// copied in as is, and the last two get merged with the last
// half of the split block.
sampleCount srcFirstTwoLen =
srcBlock->Item(0)->len + srcBlock->Item(1)->len;
sampleCount leftLen = splitPoint + srcFirstTwoLen;
sampleType *leftBuffer = new sampleType[leftLen];
Read(leftBuffer, splitBlock, 0, splitPoint);
((WaveTrack *) src)->Get(&leftBuffer[splitPoint], 0, srcFirstTwoLen);
BlockArray *split = Blockify(leftBuffer, leftLen);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += splitBlock->start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
delete[]leftBuffer;
for (i = 2; i < srcNumBlocks - 2; i++) {
WaveBlock *insertBlock = new WaveBlock();
insertBlock->start = srcBlock->Item(i)->start + s;
insertBlock->len = srcBlock->Item(i)->len;
insertBlock->min = srcBlock->Item(i)->min;
insertBlock->max = srcBlock->Item(i)->max;
insertBlock->f = dirManager->CopyBlockFile(srcBlock->Item(i)->f);
if (!insertBlock->f) {
wxMessageBox("Could not paste! (Out of disk space?)");
}
newBlock->Add(insertBlock);
newNumBlocks++;
}
sampleCount srcLastTwoLen =
srcBlock->Item(srcNumBlocks - 2)->len +
srcBlock->Item(srcNumBlocks - 1)->len;
sampleCount rightSplit = splitBlock->len - splitPoint;
sampleCount rightLen = rightSplit + srcLastTwoLen;
sampleType *rightBuffer = new sampleType[rightLen];
sampleCount lastStart = srcBlock->Item(srcNumBlocks - 2)->start;
((WaveTrack *) src)->Get(rightBuffer, lastStart, srcLastTwoLen);
Read(&rightBuffer[srcLastTwoLen], splitBlock, splitPoint,
rightSplit);
sampleCount pos = s + lastStart;
split = Blockify(rightBuffer, rightLen);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += pos;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
delete[]rightBuffer;
}
dirManager->Deref(splitBlock->f);
delete splitBlock;
// Copy remaining blocks to new block array and
// swap the new block array in for the old
for (i = b + 1; i < numBlocks; i++) {
block->Item(i)->start += addedLen;
newBlock->Add(block->Item(i));
newNumBlocks++;
}
delete block;
block = newBlock;
numSamples += addedLen;
envelope.SetTrackLen(numSamples / rate);
ConsistencyCheck("Paste branch three");
}
void WaveTrack::Delete(sampleCount start, sampleCount len)
{
if (len == 0)
return;
int numBlocks = block->Count();
int newNumBlocks = 0;
#if wxUSE_THREADS
wxMutexLocker lock(*blockMutex);
#endif
int b0 = FindBlock(start);
int b1 = FindBlock(start + len - 1);
// Special case: if the samples to delete are all within a single
// block and the resulting length is not too small, perform the
// deletion within this block:
if (b0 == b1 && block->Item(b0)->len - len >= minSamples) {
WaveBlock *b = block->Item(b0);
sampleCount pos = start - b->start;
sampleCount newLen = b->len - len;
sampleType *buffer = new sampleType[newLen];
Read(buffer, b, 0, pos);
Read(&buffer[pos], b, pos + len, newLen - pos);
WaveBlock *newBlock = NewInitedWaveBlock();
newBlock->start = b->start;
newBlock->len = newLen;
FirstWrite(buffer, newBlock, newLen);
block->Item(b0) = newBlock;
for (int j = b0 + 1; j < numBlocks; j++)
block->Item(j)->start -= len;
delete[]buffer;
dirManager->Deref(b->f);
delete b;
numSamples -= len;
envelope.SetTrackLen(numSamples / rate);
ConsistencyCheck("Delete - branch one");
return;
}
// Create a new array of blocks
BlockArray *newBlock = new BlockArray();
newBlock->Alloc(numBlocks - (b1 - b0) + 2);
// Copy the blocks before the deletion point over to
// the new array
int i;
for (i = 0; i < b0; i++) {
newBlock->Add(block->Item(i));
newNumBlocks++;
}
// First grab the samples in block b0 before the deletion point
// into preBuffer. If this is enough samples for its own block,
// or if this would be the first block in the array, write it out.
// Otherwise combine it with the previous block (splitting them
// 50/50 if necessary).
WaveBlock *preBlock = block->Item(b0);
sampleCount preBufferLen = start - preBlock->start;
if (preBufferLen) {
if (preBufferLen >= minSamples || b0 == 0) {
WaveBlock *insBlock = NewInitedWaveBlock();
insBlock->len = preBufferLen;
insBlock->start = preBlock->start;
sampleType *preBuffer = new sampleType[preBufferLen];
Read(preBuffer, preBlock, 0, preBufferLen);
FirstWrite(preBuffer, insBlock, preBufferLen);
delete[]preBuffer;
newBlock->Add(insBlock);
newNumBlocks++;
if (b0 != b1) {
dirManager->Deref(preBlock->f);
delete preBlock;
}
} else {
WaveBlock *prepreBlock = block->Item(b0 - 1);
sampleCount prepreLen = prepreBlock->len;
sampleCount sum = prepreLen + preBufferLen;
sampleType *sumBuffer = new sampleType[sum];
Read(sumBuffer, prepreBlock, 0, prepreLen);
Read(&sumBuffer[prepreLen], preBlock, 0, preBufferLen);
BlockArray *split = Blockify(sumBuffer, sum);
split->Item(0)->start += prepreBlock->start;
newBlock->Item(b0 - 1) = split->Item(0);
for (i = 1; i < split->Count(); i++) {
split->Item(i)->start += prepreBlock->start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
delete[]sumBuffer;
dirManager->Deref(prepreBlock->f);
delete prepreBlock;
if (b0 != b1) {
dirManager->Deref(preBlock->f);
delete preBlock;
}
}
} else {
// The sample where we begin deletion happens to fall
// right on the beginning of a block.
if (b0 != b1) {
dirManager->Deref(block->Item(b0)->f);
delete block->Item(b0);
}
}
// Next, delete blocks strictly between b0 and b1
for (i = b0 + 1; i < b1; i++) {
dirManager->Deref(block->Item(i)->f);
delete block->Item(i);
}
// Now, symmetrically, grab the samples in block b1 after the
// deletion point into postBuffer. If this is enough samples
// for its own block, or if this would be the last block in
// the array, write it out. Otherwise combine it with the
// subsequent block (splitting them 50/50 if necessary).
WaveBlock *postBlock = block->Item(b1);
sampleCount postBufferLen =
(postBlock->start + postBlock->len) - (start + len);
if (postBufferLen) {
if (postBufferLen >= minSamples || b1 == numBlocks - 1) {
WaveBlock *insBlock = NewInitedWaveBlock();
insBlock->len = postBufferLen;
insBlock->start = start;
sampleType *postBuffer = new sampleType[postBufferLen];
sampleCount pos = (start + len) - postBlock->start;
Read(postBuffer, postBlock, pos, postBufferLen);
FirstWrite(postBuffer, insBlock, postBufferLen);
delete[]postBuffer;
newBlock->Add(insBlock);
newNumBlocks++;
dirManager->Deref(postBlock->f);
delete postBlock;
} else {
WaveBlock *postpostBlock = block->Item(b1 + 1);
sampleCount postpostLen = postpostBlock->len;
sampleCount sum = postpostLen + postBufferLen;
sampleType *sumBuffer = new sampleType[sum];
sampleCount pos = (start + len) - postBlock->start;
Read(sumBuffer, postBlock, pos, postBufferLen);
Read(&sumBuffer[postBufferLen], postpostBlock, 0, postpostLen);
BlockArray *split = Blockify(sumBuffer, sum);
for (i = 0; i < split->Count(); i++) {
split->Item(i)->start += start;
newBlock->Add(split->Item(i));
newNumBlocks++;
}
delete split;
b1++;
delete[]sumBuffer;
dirManager->Deref(postpostBlock->f);
delete postpostBlock;
dirManager->Deref(postBlock->f);
delete postBlock;
}
} else {
// The sample where we begin deletion happens to fall
// right on the end of a block.
if (b0 != b1) {
dirManager->Deref(block->Item(b1)->f);
delete block->Item(b1);
}
}
// Copy the remaining blocks over from the old array
for (i = b1 + 1; i < numBlocks; i++) {
block->Item(i)->start -= len;
newBlock->Add(block->Item(i));
newNumBlocks++;
}
// Substitute our new array for the old one
delete block;
block = newBlock;
// Update total number of samples, update the envelope,
// and do a consistency check.
numSamples -= len;
envelope.SetTrackLen(numSamples / rate);
ConsistencyCheck("Delete - branch two");
}