phission: capture/avcodec/include/phAvcodecSource.h Source File

00001 /* ---------------------------------------------------------------------------
00002     Phission : 
00003         Realtime Vision Processing System
00004     
00005     Copyright (C) 2003-2006 Philip D.S. Thoren (pthoren@cs.uml.edu)
00006     University of Massachusetts at Lowell,
00007     Laboratory for Artificial Intelligence and Robotics
00008     
00009     This file is part of Phission.
00010 
00011     Phission is free software; you can redistribute it and/or modify
00012     it under the terms of the GNU Lesser General Public License as published by
00013     the Free Software Foundation; either version 2 of the License, or
00014     (at your option) any later version.
00015 
00016     Phission is distributed in the hope that it will be useful,
00017     but WITHOUT ANY WARRANTY; without even the implied warranty of
00018     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019     GNU Lesser General Public License for more details.
00020 
00021     You should have received a copy of the GNU Lesser General Public License
00022     along with Phission; if not, write to the Free Software
00023     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00024 
00025  ---------------------------------------------------------------------------*/
00026 #ifndef _PHAVCODECCAPTURE_H
00027 #define _PHAVCODECCAPTURE_H
00028 
00029 /* ---------------------------------------------------------------------- */
00030 #include <phImageCapture.h>
00031 
00032 /* ---------------------------------------------------------------------- */
00038 /* ---------------------------------------------------------------------- */
00039 typedef struct phAvcodecSourceInfo_t *phAvcodecSourceInfo;
00040  /* end \addtogroup Capture */
00042 
00043 /* ---------------------------------------------------------------------- */
00049 PHAPI(class) phAvcodecSource : public phImageCapture
00050 {
00051 
00052 protected:
00053     phAvcodecSourceInfo m_info;
00054 
00055     int m_device_fd;
00056     int m_is_open;
00057 
00058     int m_stream_open;
00059     int m_codec_open;
00060     int m_buffers_open;
00061 
00062     int m_user_fps;                
00063     int m_user_delay;                
00064     int m_loop;
00065 
00066     int resetInfo();
00067     int freeInfo();
00068 
00069     /* These are called internally and don't actually lock the object */
00070     /* ... quiet is used to suppress verbose error printing so the constructor
00071      * can try to determine video file information (or the onApplySettings 
00072      * method) for a given path */
00073     void calculateRates();
00074     int openStream      ( int quiet = 0 );
00075     int openCodec       ();
00076     int openBuffers     ();
00077     int closeStream     ();
00078     int closeCodec      ();
00079     int closeBuffers    ();
00080 
00081     /* on close, the class retains all previous knowledge
00082      * except the device capabilities. */
00083     virtual int open(char *deviceName);
00084     virtual int close();
00085 
00086     /* phThread overloaded methods */
00087     virtual int run();
00088     virtual int cleanup();
00089     
00090 public:
00091     phAvcodecSource(char *deviceName = NULL);
00092     ~phAvcodecSource();
00093     
00094     int setFps( int fps );
00095     int getFps();
00096     
00097     int setDelay( int delay );
00098     int getDelay();
00099 
00100     int setLoop( int loop );
00101     int getLoop();
00102 
00103     virtual int onApplySettings();
00104 
00105     virtual int isOpen();
00106 };
00107 
00108 #endif /* _PHAVCODECCAPTURE_H */