size_t PlayListStep::GetLengthMS() const
{
int msPerFrame = 1000;
PlayListItem* timesource = GetTimeSource(msPerFrame);
if (timesource != nullptr)
{
return timesource->GetDurationMS();
}
else
{
size_t len = 0;
for (auto it = _items.begin(); it != _items.end(); ++it)
{
len = std::max(len, (*it)->GetDurationMS());
}
if (len == 0)
{
for (auto it = _items.begin(); it != _items.end(); ++it)
{
len = std::max(len, (*it)->GetDurationMS(msPerFrame));
}
if (len == 0) len = msPerFrame;
}
return len;
}
}
size_t PlayListStep::GetPosition() const
{
int msPerFrame = 1000;
PlayListItem* timesource = GetTimeSource(msPerFrame);
size_t frameMS;
if (timesource != nullptr)
{
frameMS = timesource->GetPositionMS();
}
else
{
auto now = wxGetUTCTimeMillis();
if (_pause == 0)
{
frameMS = (now - _startTime).ToLong();
}
else
{
frameMS = (now - _startTime - (now - _pause)).ToLong();
}
}
return frameMS;
}
size_t PlayListStep::GetFrameMS() const
{
int ms = 0;
PlayListItem* timesource = GetTimeSource(ms);
return ms;
}
bool PlayListStep::Frame(wxByte* buffer, size_t size)
{
int msPerFrame = 1000;
PlayListItem* timesource = GetTimeSource(msPerFrame);
if (msPerFrame == 0)
{
msPerFrame = 50;
}
size_t frameMS;
if (timesource != nullptr)
{
frameMS = timesource->GetPositionMS();
}
else
{
frameMS = (wxGetUTCTimeMillis() - _startTime).ToLong();
}
for (auto it = _items.begin(); it != _items.end(); ++it)
{
(*it)->Frame(buffer, size, frameMS, msPerFrame);
}
if (timesource != nullptr)
{
return timesource->Done();
}
else
{
return frameMS >= GetLengthMS();
}
}
int TColladaAnimation::GetFrameCount() const
{
TColladaSource* timeSource = GetTimeSource();
if( timeSource )
{
return (int)timeSource->values.size();
}
assert(!"");
return 0;
}
float TColladaAnimation::GetFPS() const
{
if( ! IsEqualTimeInterval() )
return -1.0f;
TColladaSource* timeSource = GetTimeSource();
assert( timeSource );
assert( timeSource->values.size()>=2 );
return 60.0f*(timeSource->values[1] - timeSource->values[0]);
}
bool TColladaAnimation::IsEqualTimeInterval() const
{
TColladaSource* timeSource = GetTimeSource();
if( !timeSource )
return true; //HACK t
assert( timeSource );
if( timeSource->values.size()<2 )
return true;
for(int t=2;t<(int)timeSource->values.size();++t)
{
float dt0 = timeSource->values[t] - timeSource->values[t-1];
float dt1 = timeSource->values[t-1] - timeSource->values[t-2];
float diff = fabs(dt1 - dt0);
if( diff > 0.01f )
return false;
}
return true;
}
