bool FrameBuffer::SetPixels(unsigned channel, unsigned slice, const unsigned char* pixels)
{
handlePending_ = false;
ImgBuffer* img = FindImage(channel, slice);
if (img)
{
// image already exists
img->SetPixels(pixels);
}
else
{
// create a new buffer
ImgBuffer* img = InsertNewImage(channel, slice);
img->SetPixels(pixels);
}
return true;
}
/**
* Inserts a multi-channel frame in the buffer.
*/
bool CircularBuffer::InsertMultiChannel(const unsigned char* pixArray, unsigned numChannels, unsigned width, unsigned height, unsigned byteDepth, const Metadata* pMd) throw (CMMError)
{
MMThreadGuard guard(g_insertLock);
static unsigned long previousTicks = 0;
bool notOverflowed;
ImgBuffer* pImg;
unsigned long singleChannelSize = (unsigned long)width * height * byteDepth;
{
MMThreadGuard guard(g_bufferLock);
if (previousTicks > 0)
estimatedIntervalMs_ = GetClockTicksMs() - previousTicks;
else
estimatedIntervalMs_ = 0;
// check image dimensions
if (width != width_ || height != height_ || byteDepth != pixDepth_)
throw CMMError("Incompatible image dimensions in the circular buffer", MMERR_CircularBufferIncompatibleImage);
notOverflowed = (long)frameArray_.size() - (insertIndex_ - saveIndex_) > 0;
if (!notOverflowed) {
// buffer overflow
overflow_ = true;
return false;
}
}
for (unsigned i=0; i<numChannels; i++)
{
Metadata md;
{
MMThreadGuard guard(g_bufferLock);
// check if the requested (channel, slice) combination exists
// we assume that all buffers are pre-allocated
pImg = frameArray_[insertIndex_ % frameArray_.size()].FindImage(i, 0);
if (!pImg)
return false;
if (pMd)
{
// TODO: the same metadata is inserted for each channel ???
// Perhaps we need to add specific tags to each channel
md = *pMd;
}
std::string cameraName = md.GetSingleTag("Camera").GetValue();
if (imageNumbers_.end() == imageNumbers_.find(cameraName))
{
imageNumbers_[cameraName] = 0;
}
// insert image number.
md.put(MM::g_Keyword_Metadata_ImageNumber, CDeviceUtils::ConvertToString(imageNumbers_[cameraName]));
++imageNumbers_[cameraName];
}
if (!md.HasTag(MM::g_Keyword_Elapsed_Time_ms))
{
// if time tag was not supplied by the camera insert current timestamp
MM::MMTime timestamp = GetMMTimeNow();
md.PutImageTag(MM::g_Keyword_Elapsed_Time_ms, CDeviceUtils::ConvertToString(timestamp.getMsec()));
}
md.PutImageTag("Width",width);
md.PutImageTag("Height",height);
if (byteDepth == 1)
md.PutImageTag("PixelType","GRAY8");
else if (byteDepth == 2)
md.PutImageTag("PixelType","GRAY16");
else if (byteDepth == 4)
md.PutImageTag("PixelType","RGB32");
else if (byteDepth == 8)
md.PutImageTag("PixelType","RGB64");
else
md.PutImageTag("PixelType","Unknown");
pImg->SetMetadata(md);
pImg->SetPixels(pixArray + i*singleChannelSize);
}
{
MMThreadGuard guard(g_bufferLock);
imageCounter_++;
insertIndex_++;
if ((insertIndex_ - (long)frameArray_.size()) > adjustThreshold && (saveIndex_- (long)frameArray_.size()) > adjustThreshold)
{
// adjust buffer indices to avoid overflowing integer size
insertIndex_ -= adjustThreshold;
saveIndex_ -= adjustThreshold;
}
}
previousTicks = GetClockTicksMs();
return true;
}
