// WouldAcceptDragMessage
bool
InsertClipsDropState::WouldAcceptDragMessage(const BMessage* dragMessage)
{
if (dragMessage->what != MSG_DRAG_CLIP)
return false;
// inspect the message to retrieve the clip duration
ServerObjectManager* library;
if (dragMessage->FindPointer("library", (void**)&library) != B_OK)
return false;
if (!library || !library->ReadLock())
return false;
fDraggedClipDuration = 0;
Clip* clip;
for (int32 i = 0; dragMessage->FindPointer("clip", i,
(void**)&clip) == B_OK; i++) {
if (!library->HasObject(clip))
continue;
fDraggedClipDuration += ClipPlaylistItem::DefaultDuration(clip->Duration());
}
library->ReadUnlock();
fSnapFrames.CollectSnapFrames(fView->Playlist(), fDraggedClipDuration);
fSnapFrames.AddSnapFrame(0, fDraggedClipDuration);
if (fView->IsPaused())
fSnapFrames.AddSnapFrame(fView->CurrentFrame(), fDraggedClipDuration);
return true;
}
// _LayoutBackgroundSound
status_t
CollectingPlaylist::_LayoutBackgroundSound(const ServerObjectManager* library)
{
// find the background sound clip, if we are supposed to have one
Clip* soundClip = NULL;
BString soundClipID = SoundClipID();
if (soundClipID.Length() > 0) {
soundClip = dynamic_cast<Clip*>(library->FindObject(
soundClipID.String()));
if (!soundClip) {
print_error("CollectingPlaylist::_LayoutBackgroundSound() - "
"didn't background sound clip: %s (ignoring)\n",
soundClipID.String());
return B_OK;
}
} else {
// no background sound configured
return B_OK;
}
float volume = Value(PROPERTY_BACKGROUND_SOUND_VOLUME, (float)1.0);
uint64 duration = Duration();
uint64 startFrame = 0;
while (startFrame < duration) {
ClipPlaylistItem* item = new (nothrow) ClipPlaylistItem(soundClip);
if (!item) {
print_error("CollectingPlaylist::_LayoutBackgroundSound() - "
"no memory to create ClipPlaylistItem\n");
return B_NO_MEMORY;
}
uint64 itemDuration = soundClip->Duration();
uint64 maxItemDuration = duration - startFrame;
if (startFrame == 0 && itemDuration >= maxItemDuration) {
// one item as long as first track or longer
// cut off
itemDuration = maxItemDuration;
// fade in + fade out
PropertyAnimator* animator = item->AlphaAnimator();
if (animator) {
// remove all keyframes to get a clean start
animator->MakeEmpty();
KeyFrame* first = animator->InsertKeyFrameAt(0LL);
KeyFrame* fadeEnd = animator->InsertKeyFrameAt(3);
KeyFrame* fadeStart = animator->InsertKeyFrameAt(
itemDuration - 4);
KeyFrame* last = animator->InsertKeyFrameAt(itemDuration - 1);
if (!first || !fadeEnd || !fadeStart || !last) {
delete item;
print_error("CollectingPlaylist::_LayoutBackgroundSound()"
" - no memory to add fade keyframes\n");
return B_NO_MEMORY;
}
first->SetScale(0.0);
fadeEnd->SetScale(volume);
fadeStart->SetScale(volume);
last->SetScale(0.0);
}
} else if (startFrame == 0) {
// first item, more to come
// fade in
PropertyAnimator* animator = item->AlphaAnimator();
if (animator) {
// remove all keyframes to get a clean start
animator->MakeEmpty();
KeyFrame* first = animator->InsertKeyFrameAt(0LL);
KeyFrame* fadeEnd = animator->InsertKeyFrameAt(3);
KeyFrame* last = animator->InsertKeyFrameAt(itemDuration - 1);
if (!first || !fadeEnd || !last) {
delete item;
print_error("CollectingPlaylist::_LayoutBackgroundSound()"
" - no memory to add fade keyframes\n");
return B_NO_MEMORY;
}
first->SetScale(0.0);
fadeEnd->SetScale(volume);
last->SetScale(volume);
}
} else if (itemDuration >= maxItemDuration) {
// last item
// cut off
itemDuration = maxItemDuration;
// fade out
PropertyAnimator* animator = item->AlphaAnimator();
if (animator) {
// remove all keyframes to get a clean start
animator->MakeEmpty();
KeyFrame* first = animator->InsertKeyFrameAt(0LL);
KeyFrame* fadeStart = animator->InsertKeyFrameAt(
itemDuration - 4);
KeyFrame* last = animator->InsertKeyFrameAt(itemDuration - 1);
if (!first || !fadeStart || !last) {
delete item;
print_error("CollectingPlaylist::_LayoutBackgroundSound()"
" - no memory to add fade keyframes\n");
return B_NO_MEMORY;
}
first->SetScale(volume);
fadeStart->SetScale(volume);
last->SetScale(0.0);
}
} else {
// any remaining item
PropertyAnimator* animator = item->AlphaAnimator();
if (animator) {
// remove all keyframes to get a clean start
animator->MakeEmpty();
KeyFrame* first = animator->InsertKeyFrameAt(0LL);
if (!first) {
delete item;
print_error("CollectingPlaylist::_LayoutBackgroundSound()"
" - no memory to add fade keyframes\n");
return B_NO_MEMORY;
}
first->SetScale(volume);
}
}
item->SetStartFrame(startFrame);
item->SetDuration(itemDuration);
item->SetTrack(1);
if (!AddItem(item)) {
delete item;
print_error("CollectingPlaylist::_LayoutBackgroundSound() - "
"no memory to add ClipPlaylistItem\n");
return B_NO_MEMORY;
}
startFrame += itemDuration;
}
return B_OK;
}
// _CollectSequence
status_t
CollectingPlaylist::_CollectSequence(BList& collectables,
const ServerObjectManager* library)
{
collectables.SortItems(compare_collectables);
// find the transition clip, if we are supposed to have one
Clip* transitionClip = NULL;
BString transitionClipID = TransitionClipID();
if (transitionClipID.Length() > 0) {
transitionClip = dynamic_cast<Clip*>(library->FindObject(
transitionClipID.String()));
if (!transitionClip) {
print_error("CollectingPlaylist::_CollectSequence() - "
"didn't find transition clip: %s (ignoring)\n",
transitionClipID.String());
}
}
BString previousName;
int64 startFrame = 0;
uint64 maxDuration = Value(PROPERTY_DURATION, (int64)0);
uint64 defaultDuration = ItemDuration();
int32 count = collectables.CountItems();
for (int32 i = 0; i < count; i++) {
CollectablePlaylist* collectable
= (CollectablePlaylist*)collectables.ItemAtFast(i);
uint64 itemDuration = collectable->PreferredDuration();
if (itemDuration == 0)
itemDuration = defaultDuration;
if (maxDuration > 0 && startFrame + itemDuration > maxDuration) {
// we would go past our maximum duration, so stop here
break;
}
ClipPlaylistItem* item = new (nothrow) ClipPlaylistItem(collectable);
// the item, if it was created, has it's own reference now
if (!item) {
print_error("CollectingPlaylist::_CollectSequence() - "
"no memory to create ClipPlaylistItem\n");
return B_NO_MEMORY;
}
BString name(collectable->Name());
if (i > 0 && name != previousName && transitionClip) {
//printf("new sequence starts at %ld\n", i);
// a new sequence starts
ClipPlaylistItem* transitionItem
= new (nothrow) ClipPlaylistItem(transitionClip);
if (!transitionItem || !AddItem(transitionItem)) {
delete transitionItem;
print_error("CollectingPlaylist::_CollectSequence() - "
"no memory to create/add ClipPlaylistItem (transition)\n");
return B_NO_MEMORY;
}
transitionItem->SetStartFrame(startFrame);
int64 transitionDuration = transitionClip->Duration();
transitionItem->SetDuration(transitionDuration);
startFrame += transitionDuration;
}
if (!AddItem(item)) {
delete item;
print_error("CollectingPlaylist::_CollectSequence() - "
"no memory to add ClipPlaylistItem\n");
return B_NO_MEMORY;
}
item->SetStartFrame(startFrame);
item->SetDuration(itemDuration);
item->SetTrack(0);
startFrame += itemDuration;
previousName = name;
}
return B_OK;
}
// Get an openshot::Frame object for a specific frame number of this reader.
tr1::shared_ptr<Frame> Timeline::GetFrame(long int requested_frame) throw(ReaderClosed, OutOfBoundsFrame)
{
// Check for open reader (or throw exception)
if (!is_open)
throw ReaderClosed("The Timeline is closed. Call Open() before calling this method.", "");
// Adjust out of bounds frame number
if (requested_frame < 1)
requested_frame = 1;
// Check cache
tr1::shared_ptr<Frame> frame = final_cache.GetFrame(requested_frame);
if (frame) {
// Debug output
AppendDebugMethod("Timeline::GetFrame (Cached frame found)", "requested_frame", requested_frame, "", -1, "", -1, "", -1, "", -1, "", -1);
// Return cached frame
return frame;
}
else
{
// Create a scoped lock, allowing only a single thread to run the following code at one time
const GenericScopedLock<CriticalSection> lock(getFrameCriticalSection);
// Check cache again (due to locking)
frame = final_cache.GetFrame(requested_frame);
if (frame) {
// Debug output
AppendDebugMethod("Timeline::GetFrame (Cached frame found on 2nd look)", "requested_frame", requested_frame, "", -1, "", -1, "", -1, "", -1, "", -1);
// Return cached frame
return frame;
}
// Minimum number of frames to process (for performance reasons)
int minimum_frames = OPEN_MP_NUM_PROCESSORS;
// Get a list of clips that intersect with the requested section of timeline
// This also opens the readers for intersecting clips, and marks non-intersecting clips as 'needs closing'
vector<Clip*> nearby_clips = find_intersecting_clips(requested_frame, minimum_frames, true);
omp_set_num_threads(OPEN_MP_NUM_PROCESSORS);
// Allow nested OpenMP sections
omp_set_nested(true);
// Debug output
AppendDebugMethod("Timeline::GetFrame", "requested_frame", requested_frame, "minimum_frames", minimum_frames, "OPEN_MP_NUM_PROCESSORS", OPEN_MP_NUM_PROCESSORS, "", -1, "", -1, "", -1);
// GENERATE CACHE FOR CLIPS (IN FRAME # SEQUENCE)
// Determine all clip frames, and request them in order (to keep resampled audio in sequence)
for (long int frame_number = requested_frame; frame_number < requested_frame + minimum_frames; frame_number++)
{
// Calculate time of timeline frame
float requested_time = calculate_time(frame_number, info.fps);
// Loop through clips
for (int clip_index = 0; clip_index < nearby_clips.size(); clip_index++)
{
// Get clip object from the iterator
Clip *clip = nearby_clips[clip_index];
bool does_clip_intersect = (clip->Position() <= requested_time && clip->Position() + clip->Duration() >= requested_time);
if (does_clip_intersect)
{
// Get clip frame #
float time_diff = (requested_time - clip->Position()) + clip->Start();
int clip_frame_number = round(time_diff * info.fps.ToFloat()) + 1;
// Cache clip object
clip->GetFrame(clip_frame_number);
}
}
}
#pragma omp parallel
{
// Loop through all requested frames
#pragma omp for ordered firstprivate(nearby_clips, requested_frame, minimum_frames)
for (long int frame_number = requested_frame; frame_number < requested_frame + minimum_frames; frame_number++)
{
// Debug output
AppendDebugMethod("Timeline::GetFrame (processing frame)", "frame_number", frame_number, "omp_get_thread_num()", omp_get_thread_num(), "", -1, "", -1, "", -1, "", -1);
// Init some basic properties about this frame
int samples_in_frame = Frame::GetSamplesPerFrame(frame_number, info.fps, info.sample_rate, info.channels);
// Create blank frame (which will become the requested frame)
tr1::shared_ptr<Frame> new_frame(tr1::shared_ptr<Frame>(new Frame(frame_number, info.width, info.height, "#000000", samples_in_frame, info.channels)));
new_frame->SampleRate(info.sample_rate);
new_frame->ChannelsLayout(info.channel_layout);
// Debug output
AppendDebugMethod("Timeline::GetFrame (Adding solid color)", "frame_number", frame_number, "info.width", info.width, "info.height", info.height, "", -1, "", -1, "", -1);
// Add Background Color to 1st layer (if animated or not black)
if ((color.red.Points.size() > 1 || color.green.Points.size() > 1 || color.blue.Points.size() > 1) ||
(color.red.GetValue(frame_number) != 0.0 || color.green.GetValue(frame_number) != 0.0 || color.blue.GetValue(frame_number) != 0.0))
new_frame->AddColor(info.width, info.height, color.GetColorHex(frame_number));
// Calculate time of frame
float requested_time = calculate_time(frame_number, info.fps);
// Debug output
AppendDebugMethod("Timeline::GetFrame (Loop through clips)", "frame_number", frame_number, "requested_time", requested_time, "clips.size()", clips.size(), "nearby_clips.size()", nearby_clips.size(), "", -1, "", -1);
// Find Clips near this time
for (int clip_index = 0; clip_index < nearby_clips.size(); clip_index++)
{
// Get clip object from the iterator
Clip *clip = nearby_clips[clip_index];
// Does clip intersect the current requested time
bool does_clip_intersect = (clip->Position() <= requested_time && clip->Position() + clip->Duration() >= requested_time);
// Debug output
AppendDebugMethod("Timeline::GetFrame (Does clip intersect)", "frame_number", frame_number, "requested_time", requested_time, "clip->Position()", clip->Position(), "clip->Duration()", clip->Duration(), "does_clip_intersect", does_clip_intersect, "", -1);
// Clip is visible
if (does_clip_intersect)
{
// Determine if clip is "top" clip on this layer (only happens when multiple clips are overlapping)
bool is_top_clip = true;
for (int top_clip_index = 0; top_clip_index < nearby_clips.size(); top_clip_index++)
{
Clip *nearby_clip = nearby_clips[top_clip_index];
if (clip->Id() != nearby_clip->Id() && clip->Layer() == nearby_clip->Layer() &&
nearby_clip->Position() <= requested_time && nearby_clip->Position() + nearby_clip->Duration() >= requested_time &&
nearby_clip->Position() > clip->Position()) {
is_top_clip = false;
break;
}
}
// Determine the frame needed for this clip (based on the position on the timeline)
float time_diff = (requested_time - clip->Position()) + clip->Start();
int clip_frame_number = round(time_diff * info.fps.ToFloat()) + 1;
// Debug output
AppendDebugMethod("Timeline::GetFrame (Calculate clip's frame #)", "time_diff", time_diff, "requested_time", requested_time, "clip->Position()", clip->Position(), "clip->Start()", clip->Start(), "info.fps.ToFloat()", info.fps.ToFloat(), "clip_frame_number", clip_frame_number);
// Add clip's frame as layer
add_layer(new_frame, clip, clip_frame_number, frame_number, is_top_clip);
} else
// Debug output
AppendDebugMethod("Timeline::GetFrame (clip does not intersect)", "frame_number", frame_number, "requested_time", requested_time, "does_clip_intersect", does_clip_intersect, "", -1, "", -1, "", -1);
} // end clip loop
// Debug output
AppendDebugMethod("Timeline::GetFrame (Add frame to cache)", "frame_number", frame_number, "info.width", info.width, "info.height", info.height, "", -1, "", -1, "", -1);
// Add final frame to cache
final_cache.Add(frame_number, new_frame);
} // end frame loop
} // end parallel
// Debug output
AppendDebugMethod("Timeline::GetFrame (end parallel region)", "requested_frame", requested_frame, "omp_get_thread_num()", omp_get_thread_num(), "", -1, "", -1, "", -1, "", -1);
// Return frame (or blank frame)
return final_cache.GetFrame(requested_frame);
}
}