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/*********************************************************************************************************
DVR, Digital Video Recorder - a tool to record movies (audio/video), using realtime compression
It uses libavifile (see http://divx.euro.ru) and some code from kwintv (see wenk@mathematik.uni-kl.de)
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General
Public License as published by the Free Software Foundation, etc.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, etc.
copyright(C) february 2001, Pierre Hbert (pierre.hebert@netcourrier.com)
*********************************************************************************************************/
#ifndef FRAMEPOOL_H
#define FRAMEPOOL_H
class FramePool {
public:
FramePool(int width, int height, int bpp, int max_frames=20);
virtual ~FramePool();
void addFrame(unsigned char *src); // add a frame in a pool. overwrite the oldest if the pool is full
//void addSameFrame(); // add the same frame that has been previiously added (if it exists)
void removeFrame(); // remove the oldest frame
unsigned char *getFrame(); // return the adress of the oldest frame, wait for a frame to be added if the pool is empty
void setTopMargin(int); // horizontal margins
int getTopMargin() const;
void setBottomMargin(int);
int getBottomMargin() const;
int size() const;
int max_size() const;
bool full() const;
protected:
enum { SEM_ID_FRAME_AVAILABLE, SEM_ID_MUTEX };
int width, height, bpp, opp; // opp=(bpp+7)/8 bpp=bits per pixel, opp=byte per pixel
int top_margin, bottom_margin;
unsigned char *frames; // allocation pool:
bool *frames_null;
int max_frames; // max number of frames in the pool
unsigned char *previous_frame;
int frame_size; // size of a chunk in byte
int newest; // where the next added chunk will be
int oldest; // where the oldest chunk is
int nb_frames; // number of chunks actually in the pool
int sem_id;
};
#endif //FRAMEPOOL_H
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