gambas-source-code/gb.v4l/src/CWebcam.h

/***************************************************************************

  CWebcam.h

  Webcam capture component

  (C) 2005-2008 Daniel Campos Fernández <dcamposf@gmail.com>

  Based on the GPL code from "video-capture":

      (#) video-capture.c - modified from vidcat.c
      Copyright (C) 1998 Rasca, Berlin
      EMail: thron@gmx.de
      Modifications (C) 2001, Nick Andrew <nick@nick-andrew.net>

  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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.

***************************************************************************/
#ifndef __CWEBCAM_H
#define __CWEBCAM_H

#include <stdio.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/videodev.h>

#include "videodev2.h"
#include "gambas.h"

#ifndef __CWEBCAM_C

extern GB_DESC CWebcamDesc[];
extern GB_DESC CTunerDesc[];
extern GB_DESC CFeaturesDesc[];
extern GB_STREAM_DESC VideoStream;

#else

#define THIS ((CWEBCAM *)_object)
#define DEVICE (THIS->dev)
// ++ V4L2
#define MCLEAR(x) memset (&(x), 0, sizeof (x))
#define gv4l2_V4L 1
#define gv4l2_V4L2 2
// --
#endif

typedef struct	video_device {
	int	width;
	int	height;
	int	depth;		// colour depth
	int	buffer_size;	// always width * height * depth
	int	use_mmap;	// mmap() available for capturing a frame
	int	capturing;	// our device is capturing frames for us

	struct video_capability vcap;
	struct video_channel vchan;
	struct video_mbuf vmbuf;
	struct video_mmap vmmap;
	struct video_window vwin;
	struct video_picture videopict;

	unsigned char	*frame_buffer;	// not the video memory, but one image
	int	dev;		// fd of the physical device
	int Freq2;

} video_device_t;


typedef struct  
{
    GB_STREAM_DESC *desc;
    int _reserved;
    void *handle;
}  VIDEO_STREAM;

// ++ V4L2 
typedef struct gv4l2_buffer
{
        void*   start;
        size_t  length;

} gv4l2_buffer_t;
//--

typedef  struct
{
	GB_BASE ob;
	GB_STREAM stream;

	char *device;
	video_device_t *dev;
	unsigned char *membuf;
	long gotframe;
	long posframe;

	// ++ YUYV->RGB conversion
        void*                   frame;		// "current" frame buffer
	//--
	// ++ V4L2 
	//
	// There is some duplication here but we really don't want to use
	// the v4l video_device_t structure ...
	//
        struct  v4l2_capability cap;
        struct  v4l2_cropcap    cropcap;
        struct  v4l2_crop       crop;
        struct  v4l2_format     fmt;
        struct  gv4l2_buffer*   buffers;
	//
	int			is_v4l2;	// which version is this dev
        int     		io;		// raw device handle for V2
        int                     use_mmap;	// is MMAP available
        int                     buffer_count;	// number of buffers
	int			w,h;		// "current" dimensions
	//
	int			bright_max;
	int			hue_max;
	int			contrast_max;
	int			whiteness_max;
	int			color_max;
	//
	int			bright_min;
	int			hue_min;
	int			contrast_min;
	int			whiteness_min;
	int			color_min;
	//
	int			bright_def;
	int			hue_def;
	int			contrast_def;
	int			whiteness_def;
	int			color_def;
	// --

}  CWEBCAM;


int Video_stream_read(GB_STREAM *stream, char *buffer, int len);
int Video_stream_write(GB_STREAM *stream, char *buffer, int len);
int Video_stream_eof(GB_STREAM *stream);
int Video_stream_lof(GB_STREAM *stream, int64_t *len);
int Video_stream_open(GB_STREAM *stream, const char *path, int mode, void *data);
int Video_stream_seek(GB_STREAM *stream, int64_t pos, int whence);
int Video_stream_tell(GB_STREAM *stream, int64_t *pos);
int Video_stream_flush(GB_STREAM *stream);
int Video_stream_close(GB_STREAM *stream);
int Video_stream_handle(GB_STREAM *stream);


// ++ YUYV->RGB conversion
int convert_yuv_to_rgb_buffer(unsigned char *yuv, unsigned char *rgb, unsigned int width, unsigned int height);
void yuv420p_to_rgb (unsigned char *image, unsigned char *image2, int x, int y, int z);
// --

// ++ V4L2 
int 		gv4l2_available(CWEBCAM * _object);
void 		gv4l2_debug( char *s );
int 		gv4l2_xioctl( int fd,int request,void * arg);
int 		gv4l2_open_device( char* name );
void 		gv4l2_close_device( int id );
int 		gv4l2_init_device(CWEBCAM * _object , int width , int height );
int 		gv4l2_start_capture(CWEBCAM * _object);
int 		gv4l2_stop_capture(CWEBCAM * _object);
void 		gv4l2_uninit_device(CWEBCAM * _object);
void 		gv4l1_process_image (CWEBCAM * _object, void *start);
void 		gv4l2_process_image (CWEBCAM * _object, void *start);
int 		gv4l2_read_frame( CWEBCAM * _object );
int 		gv4l2_resize( CWEBCAM * _object , int width , int height );
int 		gv4l2_hue( CWEBCAM * _object , int hue );
int 		gv4l2_brightness( CWEBCAM * _object , int hue );
int 		gv4l2_contrast( CWEBCAM * _object , int value );
int 		gv4l2_color( CWEBCAM * _object , int value );
int 		gv4l2_whiteness( CWEBCAM * _object , int value );
// -- V4L2

#endif