/****************************************************************************
 *
 *  Filename: stv680.h
 *
 *  Description:
 *     This is a USB driver for STV0680 based usb video cameras.
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 ****************************************************************************/

/* size of usb transfers */
#define STV680_PACKETSIZE	4096

/* number of queued bulk transfers to use, may have problems if > 1 */
#define STV680_NUMSBUF		1

/* number of frames supported by the v4l part */
#define STV680_NUMFRAMES	2

/* scratch buffers for passing data to the decoders: 2 or 4 are good */
#define STV680_NUMSCRATCH	2

/* number of nul sized packets to receive before kicking the camera */
#define STV680_MAX_NULLPACKETS	200

/* number of decoding errors before kicking the camera */
#define STV680_MAX_ERRORS	100

#define USB_PENCAM_VENDOR_ID	0x0553
#define USB_PENCAM_PRODUCT_ID	0x0202
#define PENCAM_TIMEOUT          1000
/* fmt 4 */
#define STV_VIDEO_PALETTE       VIDEO_PALETTE_RGB24

static struct usb_device_id device_table[] = {
	{USB_DEVICE (USB_PENCAM_VENDOR_ID, USB_PENCAM_PRODUCT_ID)},
	{}
};
MODULE_DEVICE_TABLE (usb, device_table);

struct stv680_sbuf {
	unsigned char *data;
};

enum {
	FRAME_UNUSED,		/* Unused (no MCAPTURE) */
	FRAME_READY,		/* Ready to start grabbing */
	FRAME_GRABBING,		/* In the process of being grabbed into */
	FRAME_DONE,		/* Finished grabbing, but not been synced yet */
	FRAME_ERROR,		/* Something bad happened while processing */
};

enum {
	BUFFER_UNUSED,
	BUFFER_READY,
	BUFFER_BUSY,
	BUFFER_DONE,
};

/* raw camera data <- sbuf (urb transfer buf) */
struct stv680_scratch {
	unsigned char *data;
	volatile int state;
	int offset;
	int length;
};

/* processed data for display ends up here, after bayer */
struct stv680_frame {
	unsigned char *data;	/* Frame buffer */
	volatile int grabstate;	/* State of grabbing */
	unsigned char *curline;
	int curlinepix;
	int curpix;
};

/* this is almost the video structure uvd_t, with extra parameters for stv */
struct usb_stv {
	struct video_device *vdev;

	struct usb_device *udev;

	unsigned char bulk_in_endpointAddr;	/* __u8  the address of the bulk in endpoint */
	char *camera_name;

	unsigned int VideoMode;	/* 0x0100 = VGA, 0x0000 = CIF, 0x0300 = QVGA */
	int SupportedModes;
	int CIF;
	int VGA;
	int QVGA;
	int cwidth;		/* camera width */
	int cheight;		/* camera height */
	int maxwidth;		/* max video width */
	int maxheight;		/* max video height */
	int vwidth;		/* current width for video window */
	int vheight;		/* current height for video window */
	unsigned long int rawbufsize;
	unsigned long int maxframesize;	/* rawbufsize * 3 for RGB */

	int origGain;
	int origMode;		/* original camera mode */

	struct semaphore lock;	/* to lock the structure */
	int user;		/* user count for exclusive use */
	int removed;		/* device disconnected */
	int streaming;		/* Are we streaming video? */
	char *fbuf;		/* Videodev buffer area */
	struct urb *urb[STV680_NUMSBUF];	/* # of queued bulk transfers */
	int curframe;		/* Current receiving frame */
	struct stv680_frame frame[STV680_NUMFRAMES];	/* # frames supported by v4l part */
	int readcount;
	int framecount;
	int error;
	int dropped;
	int scratch_next;
	int scratch_use;
	int scratch_overflow;
	struct stv680_scratch scratch[STV680_NUMSCRATCH];	/* for decoders */
	struct stv680_sbuf sbuf[STV680_NUMSBUF];

	unsigned int brightness;
	unsigned int chgbright;
	unsigned int whiteness;
	unsigned int colour;
	unsigned int contrast;
	unsigned int hue;
	unsigned int palette;
	unsigned int depth;	/* rgb24 in bits */

	wait_queue_head_t wq;	/* Processes waiting */

	int nullpackets;
};


static unsigned char red[256] = { 
	0, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 
	18, 18, 18, 18, 18, 18, 18, 25, 30, 35, 38, 42, 
	44, 47, 50, 53, 54, 57, 59, 61, 63, 65, 67, 69, 
	71, 71, 73, 75, 77, 78, 80, 81, 82, 84, 85, 87, 
	88, 89, 90, 91, 93, 94, 95, 97, 98, 98, 99, 101, 
	102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 
	114, 115, 116, 116, 117, 118, 119, 120, 121, 122, 123, 124, 
	125, 125, 126, 127, 128, 129, 129, 130, 131, 132, 133, 134, 
	134, 135, 135, 136, 137, 138, 139, 140, 140, 141, 142, 143, 
	143, 143, 144, 145, 146, 147, 147, 148, 149, 150, 150, 151, 
	152, 152, 152, 153, 154, 154, 155, 156, 157, 157, 158, 159, 
	159, 160, 161, 161, 161, 162, 163, 163, 164, 165, 165, 166, 
	167, 167, 168, 168, 169, 170, 170, 170, 171, 171, 172, 173, 
	173, 174, 174, 175, 176, 176, 177, 178, 178, 179, 179, 179, 
	180, 180, 181, 181, 182, 183, 183, 184, 184, 185, 185, 186, 
	187, 187, 188, 188, 188, 188, 189, 190, 190, 191, 191, 192, 
	192, 193, 193, 194, 195, 195, 196, 196, 197, 197, 197, 197, 
	198, 198, 199, 199, 200, 201, 201, 202, 202, 203, 203, 204, 
	204, 205, 205, 206, 206, 206, 206, 207, 207, 208, 208, 209, 
	209, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215, 
	215, 215, 215, 216, 216, 217, 217, 218, 218, 218, 219, 219, 
	220, 220, 221, 221 
}; 

static unsigned char green[256] = {
	0, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 
	21, 21, 21, 21, 21, 21, 21, 28, 34, 39, 43, 47, 
	50, 53, 56, 59, 61, 64, 66, 68, 71, 73, 75, 77, 
	79, 80, 82, 84, 86, 87, 89, 91, 92, 94, 95, 97, 
	98, 100, 101, 102, 104, 105, 106, 108, 109, 110, 111, 113, 
	114, 115, 116, 117, 118, 120, 121, 122, 123, 124, 125, 126, 
	127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 
	139, 140, 141, 142, 143, 144, 144, 145, 146, 147, 148, 149, 
	150, 151, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159, 
	160, 160, 161, 162, 163, 164, 164, 165, 166, 167, 167, 168, 
	169, 170, 170, 171, 172, 172, 173, 174, 175, 175, 176, 177, 
	177, 178, 179, 179, 180, 181, 182, 182, 183, 184, 184, 185, 
	186, 186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 
	193, 194, 194, 195, 196, 196, 197, 198, 198, 199, 199, 200, 
	201, 201, 202, 202, 203, 204, 204, 205, 205, 206, 206, 207, 
	208, 208, 209, 209, 210, 210, 211, 212, 212, 213, 213, 214, 
	214, 215, 215, 216, 217, 217, 218, 218, 219, 219, 220, 220, 
	221, 221, 222, 222, 223, 224, 224, 225, 225, 226, 226, 227, 
	227, 228, 228, 229, 229, 230, 230, 231, 231, 232, 232, 233, 
	233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 
	239, 240, 240, 241, 241, 242, 242, 243, 243, 243, 244, 244, 
	245, 245, 246, 246 
}; 

static unsigned char blue[256] = {
	0, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 
	23, 23, 23, 23, 23, 23, 23, 30, 37, 42, 47, 51, 
	55, 58, 61, 64, 67, 70, 72, 74, 78, 80, 82, 84, 
	86, 88, 90, 92, 94, 95, 97, 100, 101, 103, 104, 106, 
	107, 110, 111, 112, 114, 115, 116, 118, 119, 121, 122, 124, 
	125, 126, 127, 128, 129, 132, 133, 134, 135, 136, 137, 138, 
	139, 140, 141, 143, 144, 145, 146, 147, 148, 149, 150, 151, 
	152, 154, 155, 156, 157, 158, 158, 159, 160, 161, 162, 163, 
	165, 166, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 
	176, 176, 177, 178, 179, 180, 180, 181, 182, 183, 183, 184, 
	185, 187, 187, 188, 189, 189, 190, 191, 192, 192, 193, 194, 
	194, 195, 196, 196, 198, 199, 200, 200, 201, 202, 202, 203, 
	204, 204, 205, 205, 206, 207, 207, 209, 210, 210, 211, 212, 
	212, 213, 213, 214, 215, 215, 216, 217, 217, 218, 218, 220, 
	221, 221, 222, 222, 223, 224, 224, 225, 225, 226, 226, 227, 
	228, 228, 229, 229, 231, 231, 232, 233, 233, 234, 234, 235, 
	235, 236, 236, 237, 238, 238, 239, 239, 240, 240, 242, 242, 
	243, 243, 244, 244, 245, 246, 246, 247, 247, 248, 248, 249, 
	249, 250, 250, 251, 251, 253, 253, 254, 254, 255, 255, 255, 
	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 
	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 
	255, 255, 255, 255 
};