bool WaveTrack::InsertSilence(double t, double len)
{
if (len <= 0)
return false;
if (mClips.IsEmpty())
{
// Special case if there is no clip yet
WaveClip* clip = CreateClip();
return clip->InsertSilence(0, len);
}
for (WaveClipList::Node* it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
if (clip->GetStartTime() > t)
clip->Offset(len);
else if (clip->GetEndTime() > t)
{
return clip->InsertSilence(t, len);
}
}
return true;
}
bool WaveTrack::SplitAt(double t)
{
for (WaveClipList::Node* it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip* c = it->GetData();
if (t > c->GetStartTime() && t < c->GetEndTime())
{
WaveClip* newClip = new WaveClip(*c, mDirManager);
if (!c->Clear(t, c->GetEndTime()))
{
delete newClip;
return false;
}
if (!newClip->Clear(c->GetStartTime(), t))
{
delete newClip;
return false;
}
newClip->Offset(t - c->GetStartTime());
mClips.Append(newClip);
return true;
}
}
return true;
}
bool WaveClip::Clear(double t0, double t1)
{
sampleCount s0, s1;
TimeToSamplesClip(t0, &s0);
TimeToSamplesClip(t1, &s1);
if (GetSequence()->Delete(s0, s1-s0))
{
// msmeyer
//
// Delete all cutlines that are within the given area, if any.
//
// Note that when cutlines are active, two functions are used:
// Clear() and ClearAndAddCutLine(). ClearAndAddCutLine() is called
// whenever the user directly calls a command that removes some audio, e.g.
// "Cut" or "Clear" from the menu. This command takes care about recursive
// preserving of cutlines within clips. Clear() is called when internal
// operations want to remove audio. In the latter case, it is the right
// thing to just remove all cutlines within the area.
//
double clip_t0 = t0;
double clip_t1 = t1;
if (clip_t0 < GetStartTime())
clip_t0 = GetStartTime();
if (clip_t1 > GetEndTime())
clip_t1 = GetEndTime();
WaveClipList::compatibility_iterator nextIt;
for (WaveClipList::compatibility_iterator it = mCutLines.GetFirst(); it; it=nextIt)
{
nextIt = it->GetNext();
WaveClip* clip = it->GetData();
double cutlinePosition = mOffset + clip->GetOffset();
if (cutlinePosition >= t0 && cutlinePosition <= t1)
{
// This cutline is within the area, delete it
delete clip;
mCutLines.DeleteNode(it);
} else
if (cutlinePosition >= t1)
{
clip->Offset(clip_t0-clip_t1);
}
}
// Collapse envelope
GetEnvelope()->CollapseRegion(t0, t1);
if (t0 < GetStartTime())
Offset(-(GetStartTime() - t0));
MarkChanged();
return true;
}
return false;
}
void WaveClip::OffsetCutLines(double t0, double len)
{
for (WaveClipList::compatibility_iterator it = mCutLines.GetFirst(); it; it=it->GetNext())
{
WaveClip* cutLine = it->GetData();
if (mOffset + cutLine->GetOffset() >= t0)
cutLine->Offset(len);
}
}
bool WaveClip::Paste(double t0, WaveClip* other)
{
WaveClip* pastedClip;
bool clipNeedsResampling = other->mRate != mRate;
if (clipNeedsResampling)
{
// The other clip's rate is different to our's, so resample
pastedClip = new WaveClip(*other, mSequence->GetDirManager());
if (!pastedClip->Resample(mRate))
{
delete pastedClip;
return false;
}
} else
{
// No resampling needed, just use original clip without making a copy
pastedClip = other;
}
sampleCount s0;
TimeToSamplesClip(t0, &s0);
// Force sample formats to match.
if (pastedClip->mSequence->GetSampleFormat() != mSequence->GetSampleFormat())
pastedClip->ConvertToSampleFormat(mSequence->GetSampleFormat());
bool result = false;
if (mSequence->Paste(s0, pastedClip->mSequence))
{
MarkChanged();
mEnvelope->Paste((double)s0/mRate + mOffset, pastedClip->mEnvelope);
mEnvelope->RemoveUnneededPoints();
OffsetCutLines(t0, pastedClip->GetEndTime() - pastedClip->GetStartTime());
// Paste cut lines contained in pasted clip
for (WaveClipList::compatibility_iterator it = pastedClip->mCutLines.GetFirst(); it; it=it->GetNext())
{
WaveClip* cutline = it->GetData();
WaveClip* newCutLine = new WaveClip(*cutline,
mSequence->GetDirManager());
newCutLine->Offset(t0 - mOffset);
mCutLines.Append(newCutLine);
}
result = true;
}
if (clipNeedsResampling)
{
// Clip was constructed as a copy, so delete it
delete pastedClip;
}
return result;
}
bool WaveClip::ClearAndAddCutLine(double t0, double t1)
{
if (t0 > GetEndTime() || t1 < GetStartTime())
return true; // time out of bounds
WaveClip *newClip = new WaveClip(mSequence->GetDirManager(),
mSequence->GetSampleFormat(),
mRate);
double clip_t0 = t0;
double clip_t1 = t1;
if (clip_t0 < GetStartTime())
clip_t0 = GetStartTime();
if (clip_t1 > GetEndTime())
clip_t1 = GetEndTime();
if (!newClip->CreateFromCopy(clip_t0, clip_t1, this))
return false;
newClip->SetOffset(clip_t0-mOffset);
// Sort out cutlines that belong to the new cutline
WaveClipList::compatibility_iterator nextIt;
for (WaveClipList::compatibility_iterator it = mCutLines.GetFirst(); it; it=nextIt)
{
nextIt = it->GetNext();
WaveClip* clip = it->GetData();
double cutlinePosition = mOffset + clip->GetOffset();
if (cutlinePosition >= t0 && cutlinePosition <= t1)
{
clip->SetOffset(cutlinePosition - newClip->GetOffset() - mOffset);
newClip->mCutLines.Append(clip);
mCutLines.DeleteNode(it);
} else
if (cutlinePosition >= t1)
{
clip->Offset(clip_t0-clip_t1);
}
}
// Clear actual audio data
sampleCount s0, s1;
TimeToSamplesClip(t0, &s0);
TimeToSamplesClip(t1, &s1);
if (GetSequence()->Delete(s0, s1-s0))
{
// Collapse envelope
GetEnvelope()->CollapseRegion(t0, t1);
if (t0 < GetStartTime())
Offset(-(GetStartTime() - t0));
MarkChanged();
mCutLines.Append(newClip);
return true;
} else
{
delete newClip;
return false;
}
}
bool WaveTrack::HandleClear(double t0, double t1,
bool addCutLines, bool split)
{
if (t1 < t0)
return false;
WaveClipList::Node* it;
WaveClipList clipsToDelete;
WaveClipList clipsToAdd;
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
if (t0 <= clip->GetStartTime() && t1 >= clip->GetEndTime())
{
// Whole clip must be deleted - remember this
clipsToDelete.Append(clip);
} else
if (t1 > clip->GetStartTime() && t0 < clip->GetEndTime())
{
// Clip data is affected by command
if (addCutLines)
{
if (!clip->ClearAndAddCutLine(t0,t1))
return false;
} else
{
if (split) {
// Three cases:
if (t0 <= clip->GetStartTime()) {
// Delete from the left edge
clip->Clear(clip->GetStartTime(), t1);
clip->Offset(t1-clip->GetStartTime());
} else
if (t1 >= clip->GetEndTime()) {
// Delete to right edge
clip->Clear(t0, clip->GetEndTime());
} else
{
// Delete in the middle of the clip...we actually create two
// new clips out of the left and right halves...
WaveClip *left = new WaveClip(*clip, mDirManager);
left->Clear(t0, clip->GetEndTime());
clipsToAdd.Append(left);
WaveClip *right = new WaveClip(*clip, mDirManager);
right->Clear(clip->GetStartTime(), t1);
right->Offset(t1-clip->GetStartTime());
clipsToAdd.Append(right);
clipsToDelete.Append(clip);
}
}
else {
if (!clip->Clear(t0,t1))
return false;
}
}
} else
if (clip->GetStartTime() >= t1)
{
// Clip is "behind" the region -- offset it unless we're splitting
if (!split)
clip->Offset(-(t1-t0));
}
}
for (it=clipsToDelete.GetFirst(); it; it=it->GetNext())
{
mClips.DeleteObject(it->GetData());
delete it->GetData();
}
for (it=clipsToAdd.GetFirst(); it; it=it->GetNext())
{
mClips.Append(it->GetData());
}
return true;
}
bool WaveTrack::Paste(double t0, Track *src)
{
//printf("paste: entering WaveTrack::Paste\n");
if (src->GetKind() != Track::Wave)
return false;
//printf("paste: we have a wave track\n");
WaveTrack* other = (WaveTrack*)src;
//
// Pasting is a bit complicated, because with the existence of multiclip mode,
// we must guess the behaviour the user wants.
//
// Currently, two modes are implemented:
//
// - If a single clip should be pasted, and it should be pasted inside another
// clip, no new clips are generated. The audio is simply inserted.
// This resembles the old (pre-multiclip support) behaviour. However, if
// the clip is pasted outside of any clip, a new clip is generated. This is
// the only behaviour which is different to what was done before, but it
// shouldn't confuse users too much.
//
// - If multiple clips should be pasted, these are always pasted as single
// clips, and the current clip is splitted, when necessary. This may seem
// strange at first, but it probably is better than trying to auto-merge
// anything. The user can still merge the clips by hand (which should be
// a simple command reachable by a hotkey or single mouse click).
//
if (other->GetNumClips() == 0)
return false;
//printf("paste: we have at least one clip\n");
double insertDuration = other->GetEndTime();
WaveClipList::Node* it;
//printf("Check if we need to make room for the pasted data\n");
// Make room for the pasted data, unless the space being pasted in is empty of
// any clips
if (!IsEmpty(t0, t0+insertDuration-1.0/mRate)) {
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip* clip = it->GetData();
//printf("paste: offsetting already existing clip %i by %f seconds\n",
//(int)clip, insertDuration);
if (clip->GetStartTime() > t0-(1.0/mRate))
clip->Offset(insertDuration);
}
}
if (other->GetNumClips() == 1)
{
// Single clip mode
// printf("paste: checking for single clip mode!\n");
WaveClip *insideClip = NULL;
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
// The 1.0/mRate is the time for one sample - kind of a fudge factor,
// because an overlap of less than a sample should not trigger
// traditional behaviour.
if (t0+src->GetEndTime()-1.0/mRate > clip->GetStartTime() &&
t0 < clip->GetEndTime() - 1.0/mRate)
{
//printf("t0=%.6f: inside clip is %.6f ... %.6f\n",
// t0, clip->GetStartTime(), clip->GetEndTime());
insideClip = clip;
break;
}
}
if (insideClip)
{
// Exhibit traditional behaviour
//printf("paste: traditional behaviour\n");
return insideClip->Paste(t0, other->GetClipByIndex(0));
}
// Just fall through and exhibit new behaviour
}
// Insert new clips
//printf("paste: multi clip mode!\n");
for (it=other->GetClipIterator(); it; it=it->GetNext())
{
WaveClip* clip = it->GetData();
WaveClip* newClip = new WaveClip(*clip, mDirManager);
newClip->Offset(t0);
newClip->MarkChanged();
mClips.Append(newClip);
}
return true;
}
bool WaveTrack::Copy(double t0, double t1, Track **dest)
{
*dest = NULL;
if (t1 <= t0)
return false;
WaveTrack *newTrack = new WaveTrack(mDirManager);
newTrack->Init(*this);
WaveClipList::Node* it;
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
if (t0 <= clip->GetStartTime() && t1 >= clip->GetEndTime())
{
// Whole clip is in copy region
//printf("copy: clip %i is in copy region\n", (int)clip);
WaveClip *newClip = new WaveClip(*clip, mDirManager);
newClip->RemoveAllCutLines();
newClip->Offset(-t0);
newTrack->mClips.Append(newClip);
} else
if (t1 > clip->GetStartTime() && t0 < clip->GetEndTime())
{
// Clip is affected by command
//printf("copy: clip %i is affected by command\n", (int)clip);
WaveClip *newClip = new WaveClip(*clip, mDirManager);
newClip->RemoveAllCutLines();
double clip_t0 = t0;
double clip_t1 = t1;
if (clip_t0 < clip->GetStartTime())
clip_t0 = clip->GetStartTime();
if (clip_t1 > clip->GetEndTime())
clip_t1 = clip->GetEndTime();
//printf("copy: clip_t0=%f, clip_t1=%f\n", clip_t0, clip_t1);
newClip->Offset(-t0);
if (newClip->GetOffset() < 0)
newClip->SetOffset(0);
//printf("copy: clip offset is now %f\n", newClip->GetOffset());
if (!newClip->CreateFromCopy(clip_t0, clip_t1, clip))
{
//printf("paste: CreateFromCopy(%f, %f, %i) returns false, quitting\n",
// clip_t0, clip_t1, (int)clip);
return false;
}
newTrack->mClips.Append(newClip);
}
}
*dest = newTrack;
return true;
}
