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Stream.h
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Stream.h
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// Stream.h -*- C++ -*-
//
// Copyright (c) 2014 Kimball Thurston
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#pragma once
#include <mutex>
#include <condition_variable>
#include <vector>
#include <memory>
////////////////////////////////////////
///
/// @file Stream.h
///
/// @author Kimball Thurston
///
namespace USB
{
struct ROI
{
int x, y;
int w, h;
};
class ImageBuffer
{
public:
enum class Format
{
BAYER_GRBG,
BAYER_GBRG,
BAYER_RGGB,
BAYER_BGGR,
MONO_8,
MONO_16,
YUY2,
UYVY,
UNKNOWN
};
ImageBuffer( void );
~ImageBuffer( void );
// returns true when full
bool addData( const uint8_t *buf, int &len );
void reset( Format fmt, int w, int h, int bpl, int bpp, const ROI &roi );
bool empty( void ) const { return myCurX == myROI.x && myCurY == myROI.y; }
bool partial( void ) const { return myCurY < myROI.h; }
inline const ROI &roi( void ) const { return myROI; }
inline Format format( void ) const { return myFormat; }
inline int width( void ) const { return myWidth; }
inline int height( void ) const { return myHeight; }
inline int bytesPerLine( void ) const { return myBytesPerLine; }
inline int bytesPerPixel( void ) const { return myBytesPerPixel; }
inline const uint8_t *data( void ) const { return myBuffer.data(); }
private:
ROI myROI;
Format myFormat = Format::MONO_8;
int myWidth = 0;
int myHeight = 0;
int myBytesPerLine = 0;
int myBytesPerPixel = 0;
int myCurX = 0;
int myCurY = 0;
std::vector<uint8_t> myBuffer;
};
///
/// @brief Class Stream provides...
///
class VideoStream
{
public:
VideoStream( void );
~VideoStream( void );
std::shared_ptr<ImageBuffer> get( void );
void put( std::shared_ptr<ImageBuffer> &buf );
int width( void ) const { return myWidth; }
int height( void ) const { return myHeight; }
const ROI &roi( void ) const { return myROI; }
void setROI( const ROI &roi );
void reset( int w, int h, int bpl, int bpp, ImageBuffer::Format fmt, size_t maxN );
void clear( void );
bool off( void ) const;
private:
inline bool off_locked( void ) const { return myMaxBuffers == 0; }
mutable std::mutex myMutex;
std::condition_variable myHasBufferNotify;
ROI myROI;
int myWidth = 0;
int myHeight = 0;
int myBytesPerLine = 0;
int myBytesPerPixel = 1;
ImageBuffer::Format myFormat = ImageBuffer::Format::MONO_8;
size_t myMaxBuffers = 0;
size_t myLiveBuffers = 0;
std::vector<std::shared_ptr<ImageBuffer>> myBuffers;
};
} // namespace usb