zoneminder/src/zm_stream.h

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//
// ZoneMinder Stream Interfaces, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
//
// 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; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
#ifndef ZM_STREAM_H
#define ZM_STREAM_H
#include <sys/un.h>
#include <sys/socket.h>
#include "zm.h"
#include "zm_mpeg.h"
class Monitor;
#define TV_2_FLOAT( tv ) ( double((tv).tv_sec) + (double((tv).tv_usec) / 1000000.0) )
class StreamBase
{
public:
typedef enum { STREAM_JPEG, STREAM_RAW, STREAM_ZIP, STREAM_SINGLE, STREAM_MPEG } StreamType;
protected:
static const int MAX_STREAM_DELAY = 5; // Seconds
static const StreamType DEFAULT_TYPE = STREAM_JPEG;
enum { DEFAULT_RATE=ZM_RATE_BASE };
enum { DEFAULT_SCALE=ZM_SCALE_BASE };
enum { DEFAULT_ZOOM=ZM_SCALE_BASE };
enum { DEFAULT_MAXFPS=10 };
enum { DEFAULT_BITRATE=100000 };
protected:
typedef struct {
int msg_type;
char msg_data[16];
} CmdMsg;
typedef struct {
int msg_type;
char msg_data[256];
} DataMsg;
typedef enum { MSG_CMD=1, MSG_DATA_WATCH, MSG_DATA_EVENT } MsgType;
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typedef enum { CMD_NONE=0, CMD_PAUSE, CMD_PLAY, CMD_STOP, CMD_FASTFWD, CMD_SLOWFWD, CMD_SLOWREV, CMD_FASTREV, CMD_ZOOMIN, CMD_ZOOMOUT, CMD_PAN, CMD_SCALE, CMD_PREV, CMD_NEXT, CMD_SEEK, CMD_VARPLAY, CMD_GET_IMAGE, CMD_QUIT, CMD_QUERY=99 } MsgCommand;
protected:
Monitor *monitor;
StreamType type;
const char *format;
int replay_rate;
int scale;
int zoom;
double maxfps;
int bitrate;
unsigned short x, y;
protected:
int connkey;
int sd;
char loc_sock_path[PATH_MAX];
struct sockaddr_un loc_addr;
char rem_sock_path[PATH_MAX];
struct sockaddr_un rem_addr;
char sock_path_lock[PATH_MAX];
int lock_fd;
protected:
bool paused;
int step;
struct timeval now;
double base_fps;
double effective_fps;
int frame_mod;
double last_frame_sent;
struct timeval last_frame_timestamp;
#if HAVE_LIBAVCODEC
VideoStream *vid_stream;
#endif // HAVE_LIBAVCODEC
CmdMsg msg;
protected:
bool loadMonitor( int monitor_id );
bool checkInitialised();
void updateFrameRate( double fps );
Image *prepareImage( Image *image );
bool sendTextFrame( const char *text );
bool checkCommandQueue();
virtual void processCommand( const CmdMsg *msg )=0;
public:
StreamBase()
{
monitor = 0;
type = DEFAULT_TYPE;
format = "";
replay_rate = DEFAULT_RATE;
scale = DEFAULT_SCALE;
zoom = DEFAULT_ZOOM;
maxfps = DEFAULT_MAXFPS;
bitrate = DEFAULT_BITRATE;
paused = false;
step = 0;
x = 0;
y = 0;
connkey = 0;
sd = -1;
lock_fd = 0;
memset( &loc_sock_path, 0, sizeof(loc_sock_path) );
memset( &loc_addr, 0, sizeof(loc_addr) );
memset( &rem_sock_path, 0, sizeof(rem_sock_path) );
memset( &rem_addr, 0, sizeof(rem_addr) );
base_fps = 0.0;
effective_fps = 0.0;
frame_mod = 1;
#if HAVE_LIBAVCODEC
vid_stream = 0;
#endif // HAVE_LIBAVCODEC
}
virtual ~StreamBase();
void setStreamType( StreamType p_type )
{
type = p_type;
}
void setStreamFormat( const char *p_format )
{
format = p_format;
}
void setStreamScale( int p_scale )
{
scale = p_scale;
}
void setStreamReplayRate( int p_rate )
{
replay_rate = p_rate;
}
void setStreamMaxFPS( double p_maxfps )
{
maxfps = p_maxfps;
}
void setStreamBitrate( int p_bitrate )
{
bitrate = p_bitrate;
}
void setStreamQueue( int p_connkey )
{
connkey = p_connkey;
}
virtual void openComms();
virtual void closeComms();
virtual void runStream()=0;
};
#endif // ZM_STREAM_H