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/*
* Copyright (c) 2011 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
*/
/** @file
* This file provides conversion functions for a variety of video modes
*/
#ifndef __BASE_VNC_CONVERT_HH__
#define __BASE_VNC_CONVERT_HH__
#include <zlib.h>
#include "base/bitunion.hh"
class VideoConvert
{
public:
enum Mode {
UnknownMode,
bgr565,
rgb565,
bgr8888,
rgb8888,
rgb888,
bgr888,
bgr444,
bgr4444,
rgb444,
rgb4444,
};
// supports bpp32 RGB (bmp) and bpp16 5:6:5 mode BGR (linux)
BitUnion32(Rgb8888)
Bitfield<7,0> blue;
Bitfield<15,8> green;
Bitfield<23,16> red;
Bitfield<31,24> alpha;
EndBitUnion(Rgb8888)
BitUnion32(Bgr8888)
Bitfield<7,0> red;
Bitfield<15,8> green;
Bitfield<23,16> blue;
Bitfield<31,24> alpha;
EndBitUnion(Bgr8888)
BitUnion16(Bgr565)
Bitfield<4,0> red;
Bitfield<10,5> green;
Bitfield<15,11> blue;
EndBitUnion(Bgr565)
BitUnion16(Rgb565)
Bitfield<4,0> red;
Bitfield<10,5> green;
Bitfield<15,11> blue;
EndBitUnion(Rgb565)
/** Setup the converter with the given parameters
* @param input_mode type of data that will be provided
* @param output_mode type of data that should be output
* @param _width width of the frame buffer
* @param _height height of the frame buffer
*/
VideoConvert(Mode input_mode, Mode output_mode, int _width, int _height);
/** Destructor
*/
~VideoConvert();
/** Convert the provided frame buffer data into the format specified in the
* constructor.
* @param fb the frame buffer to convert
* @return the converted data (user must free)
*/
uint8_t* convert(const uint8_t *fb) const;
/** Return the number of pixels that this buffer specifies
* @return number of pixels
*/
int area() const { return width * height; }
/**
* Returns a hash on the raw data.
*
* @return hash of the buffer
*/
inline uint64_t getHash(const uint8_t *fb) const {
return adler32(0UL, fb, width * height);
}
private:
/**
* Convert a bgr8888 input to rgb8888.
* @param fb the data to convert
* @return converted data
*/
uint8_t* bgr8888rgb8888(const uint8_t *fb) const;
/**
* Convert a bgr565 or rgb565 input to rgb8888.
* @param fb the data to convert
* @param bgr true if the input data is bgr565
* @return converted data
*/
uint8_t* m565rgb8888(const uint8_t *fb, bool bgr) const;
Mode inputMode;
Mode outputMode;
int width;
int height;
};
#endif // __BASE_VNC_CONVERT_HH__
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