PNGGenerator Class Reference
#include <PNGGenerator.h>
Inheritance diagram for PNGGenerator:
Detailed Description
Generates FilterBankEvents containing PNG compressed images.This class shares a lot of non-PNG specific code with JPEGGenerator, so you may want to replicate any changes made in that class as well.
- Todo:
- create a common super class with JPEGGenerator to hold common setup code
Definition at line 14 of file PNGGenerator.h.
Public Types | |
| SRC_AUTO | |
| if src is not a InterleavedYUVGenerator, SRC_GREYSCALE, otherwise SRC_COLOR | |
| SRC_GRAYSCALE | |
| indicates each channel of source should be compressed individually as grayscale images | |
| SRC_COLOR | |
| indicates first channel should be in an interleaved layout which can be compressed into a "color" image | |
| enum | src_mode_t { SRC_AUTO, SRC_GRAYSCALE, SRC_COLOR } |
| defines how to interpret the source images (see srcMode and curMode) More... | |
Public Member Functions | |
| PNGGenerator (unsigned int mysid, FilterBankGenerator *fbg, EventBase::EventTypeID_t tid) | |
| constructor | |
| PNGGenerator (unsigned int mysid, PNGGenerator::src_mode_t sMode, FilterBankGenerator *fbg, EventBase::EventTypeID_t tid) | |
| constructor | |
| virtual | ~PNGGenerator () |
| destructor | |
| virtual void | setSourceMode (src_mode_t mode) |
| set srcMode and curMode as well if mode==SRC_AUTO | |
| virtual src_mode_t | getSourceMode () const |
| returns srcMode | |
| virtual src_mode_t | getCurrentSourceFormat () const |
| returns curMode | |
| virtual void | processEvent (const EventBase &event) |
| should receive FilterBankEvents from a RawCameraGenerator (or a subclass thereof) | |
| virtual unsigned int | getBinSize () const |
| if we don't already know bytesUsed, let's assume the size will be smaller than the original uncompressed. If we fail this assumption, probably better to fail anyway. | |
| virtual unsigned int | loadBuffer (const char buf[], unsigned int len) |
| virtual unsigned int | saveBuffer (char buf[], unsigned int len) const |
| you probably don't want to be calling this to access the PNG -- use getImage() instead (saveBuffer will prepend some header information before the actual image data) | |
| virtual unsigned int | getImageSize (unsigned int layer, unsigned int chan) const |
| returns the number of bytes used for the image returned by getImage() - will return 0 if the image hasn't been calculated yet (so call it after getImage()) | |
Static Public Member Functions | |
| static std::string | getClassDescription () |
| Gives a short description of what this class of behaviors does... you should override this (but don't have to). | |
Static Public Attributes | |
| static const unsigned int | PNG_HEADER_PAD = 500 |
| add a bit to the expected size in getBinSize just to leave a little extra room for small images | |
Protected Member Functions | |
| virtual void | setNumImages (unsigned int nLayers, unsigned int nChannels) |
| resizes the filter bank information storage area, you should override this to do your setup and call it from your constructor | |
| virtual unsigned char * | createImageCache (unsigned int layer, unsigned int chan) const |
| create new image data storage area for the cache - this called by getImage() only when the corresponding entry in images is NULL | |
| virtual void | calcImage (unsigned int layer, unsigned int chan) |
| should calculate new image data, called by getImage() only when imageValids indicates the image being requested is dirty (and only after getImage() has already called createImageCache()) | |
| virtual void | destruct () |
| deletes the arrays | |
Protected Attributes | |
| src_mode_t | srcMode |
| how to interpret source channel of next filter bank event | |
| src_mode_t | curMode |
| how to interpret getImage's current image | |
| unsigned int ** | bytesUsed |
| number of bytes used per image to actually store data; | |
Private Member Functions | |
| PNGGenerator (const PNGGenerator &fbk) | |
| don't call | |
| const PNGGenerator & | operator= (const PNGGenerator &fbk) |
| don't call | |
Member Enumeration Documentation
defines how to interpret the source images (see srcMode and curMode)
- Enumerator:
-
SRC_AUTO if src is not a InterleavedYUVGenerator, SRC_GREYSCALE, otherwise SRC_COLOR SRC_GRAYSCALE indicates each channel of source should be compressed individually as grayscale images SRC_COLOR indicates first channel should be in an interleaved layout which can be compressed into a "color" image
Definition at line 19 of file PNGGenerator.h.
Member Function Documentation
| void PNGGenerator::calcImage | ( | unsigned int | layer, | |
| unsigned int | chan | |||
| ) | [protected, virtual] |
should calculate new image data, called by getImage() only when imageValids indicates the image being requested is dirty (and only after getImage() has already called createImageCache())
This is where you'll want to put your user-specific code for calculating the image data
Implements FilterBankGenerator.
Definition at line 183 of file PNGGenerator.cc.
| unsigned char * PNGGenerator::createImageCache | ( | unsigned int | layer, | |
| unsigned int | chan | |||
| ) | const [protected, virtual] |
create new image data storage area for the cache - this called by getImage() only when the corresponding entry in images is NULL
You should return the pointer you want stored in images to be returned by any calls to getFirstRow. Interpretation of the data it points to is dependant on the the generator which creates it
Implements FilterBankGenerator.
Definition at line 178 of file PNGGenerator.cc.
Referenced by loadBuffer().
| static std::string PNGGenerator::getClassDescription | ( | ) | [inline, static] |
Gives a short description of what this class of behaviors does... you should override this (but don't have to).
If you do override this, also consider overriding getDescription() to return it
Reimplemented from BehaviorBase.
Definition at line 40 of file PNGGenerator.h.
| unsigned int PNGGenerator::loadBuffer | ( | const char | buf[], | |
| unsigned int | len | |||
| ) | [virtual] |
The loadBuffer() functions of the included subclasses aren't tested, so don't assume they'll work without a little debugging...
Reimplemented from FilterBankGenerator.
Definition at line 94 of file PNGGenerator.cc.
| void PNGGenerator::processEvent | ( | const EventBase & | event | ) | [virtual] |
should receive FilterBankEvents from a RawCameraGenerator (or a subclass thereof)
The const casts in this function are regretable but necessary since the corresponding OPEN-R functions require mutable arguments, even though they shouldn't be modifying the data
Reimplemented from FilterBankGenerator.
Definition at line 55 of file PNGGenerator.cc.
| void PNGGenerator::setNumImages | ( | unsigned int | nLayers, | |
| unsigned int | nChannels | |||
| ) | [protected, virtual] |
resizes the filter bank information storage area, you should override this to do your setup and call it from your constructor
In general, it isn't expected that FilterBankGenerator's should necessarily be dynamically resizeable (although it would be nice), which is why this isn't public. If yours is, just add some pubic accessor functions which call this. In general, the included subclasses should be able to handle being resized, but there's no reason to do so since the system won't be changing its available resolutions at run time.
The default implementation is a no-op if(numLayers==nLayers && numChannels==nChannels)
Reimplemented from FilterBankGenerator.
Definition at line 162 of file PNGGenerator.cc.
Referenced by PNGGenerator().
The documentation for this class was generated from the following files:
