273 lines
9.6 KiB
C
273 lines
9.6 KiB
C
/* (C) 1999-2003 Nemosoft Unv.
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(C) 2004 Luc Saillard (luc@saillard.org)
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NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
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driver and thus may have bugs that are not present in the original version.
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Please send bug reports and support requests to <luc@saillard.org>.
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The decompression routines have been implemented by reverse-engineering the
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Nemosoft binary pwcx module. Caveat emptor.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PWC_H
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#define PWC_H
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <linux/spinlock.h>
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#include <linux/videodev.h>
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#include <linux/wait.h>
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#include <linux/smp_lock.h>
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#include <asm/semaphore.h>
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#include <asm/errno.h>
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#include "pwc-uncompress.h"
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#include "pwc-ioctl.h"
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/* Defines and structures for the Philips webcam */
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/* Used for checking memory corruption/pointer validation */
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#define PWC_MAGIC 0x89DC10ABUL
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#undef PWC_MAGIC
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/* Turn some debugging options on/off */
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#define PWC_DEBUG 0
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/* Trace certain actions in the driver */
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#define TRACE_MODULE 0x0001
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#define TRACE_PROBE 0x0002
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#define TRACE_OPEN 0x0004
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#define TRACE_READ 0x0008
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#define TRACE_MEMORY 0x0010
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#define TRACE_FLOW 0x0020
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#define TRACE_SIZE 0x0040
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#define TRACE_PWCX 0x0080
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#define TRACE_SEQUENCE 0x1000
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#define Trace(R, A...) if (pwc_trace & R) printk(KERN_DEBUG PWC_NAME " " A)
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#define Debug(A...) printk(KERN_DEBUG PWC_NAME " " A)
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#define Info(A...) printk(KERN_INFO PWC_NAME " " A)
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#define Err(A...) printk(KERN_ERR PWC_NAME " " A)
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/* Defines for ToUCam cameras */
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#define TOUCAM_HEADER_SIZE 8
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#define TOUCAM_TRAILER_SIZE 4
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#define FEATURE_MOTOR_PANTILT 0x0001
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/* Version block */
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#define PWC_MAJOR 9
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#define PWC_MINOR 0
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#define PWC_VERSION "9.0.2-unofficial"
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#define PWC_NAME "pwc"
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/* Turn certain features on/off */
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#define PWC_INT_PIPE 0
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/* Ignore errors in the first N frames, to allow for startup delays */
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#define FRAME_LOWMARK 5
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/* Size and number of buffers for the ISO pipe. */
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#define MAX_ISO_BUFS 2
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#define ISO_FRAMES_PER_DESC 10
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#define ISO_MAX_FRAME_SIZE 960
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#define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
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/* Frame buffers: contains compressed or uncompressed video data. */
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#define MAX_FRAMES 5
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/* Maximum size after decompression is 640x480 YUV data, 1.5 * 640 * 480 */
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#define PWC_FRAME_SIZE (460800 + TOUCAM_HEADER_SIZE + TOUCAM_TRAILER_SIZE)
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/* Absolute maximum number of buffers available for mmap() */
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#define MAX_IMAGES 10
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/* The following structures were based on cpia.h. Why reinvent the wheel? :-) */
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struct pwc_iso_buf
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{
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void *data;
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int length;
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int read;
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struct urb *urb;
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};
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/* intermediate buffers with raw data from the USB cam */
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struct pwc_frame_buf
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{
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void *data;
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volatile int filled; /* number of bytes filled */
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struct pwc_frame_buf *next; /* list */
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#if PWC_DEBUG
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int sequence; /* Sequence number */
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#endif
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};
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struct pwc_device
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{
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struct video_device *vdev;
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#ifdef PWC_MAGIC
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int magic;
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#endif
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/* Pointer to our usb_device */
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struct usb_device *udev;
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int type; /* type of cam (645, 646, 675, 680, 690, 720, 730, 740, 750) */
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int release; /* release number */
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int features; /* feature bits */
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char serial[30]; /* serial number (string) */
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int error_status; /* set when something goes wrong with the cam (unplugged, USB errors) */
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int usb_init; /* set when the cam has been initialized over USB */
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/*** Video data ***/
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int vopen; /* flag */
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int vendpoint; /* video isoc endpoint */
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int vcinterface; /* video control interface */
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int valternate; /* alternate interface needed */
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int vframes, vsize; /* frames-per-second & size (see PSZ_*) */
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int vpalette; /* palette: 420P, RAW or RGBBAYER */
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int vframe_count; /* received frames */
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int vframes_dumped; /* counter for dumped frames */
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int vframes_error; /* frames received in error */
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int vmax_packet_size; /* USB maxpacket size */
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int vlast_packet_size; /* for frame synchronisation */
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int visoc_errors; /* number of contiguous ISOC errors */
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int vcompression; /* desired compression factor */
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int vbandlength; /* compressed band length; 0 is uncompressed */
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char vsnapshot; /* snapshot mode */
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char vsync; /* used by isoc handler */
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char vmirror; /* for ToUCaM series */
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int cmd_len;
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unsigned char cmd_buf[13];
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/* The image acquisition requires 3 to 4 steps:
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1. data is gathered in short packets from the USB controller
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2. data is synchronized and packed into a frame buffer
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3a. in case data is compressed, decompress it directly into image buffer
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3b. in case data is uncompressed, copy into image buffer with viewport
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4. data is transferred to the user process
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Note that MAX_ISO_BUFS != MAX_FRAMES != MAX_IMAGES....
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We have in effect a back-to-back-double-buffer system.
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*/
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/* 1: isoc */
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struct pwc_iso_buf sbuf[MAX_ISO_BUFS];
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char iso_init;
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/* 2: frame */
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struct pwc_frame_buf *fbuf; /* all frames */
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struct pwc_frame_buf *empty_frames, *empty_frames_tail; /* all empty frames */
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struct pwc_frame_buf *full_frames, *full_frames_tail; /* all filled frames */
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struct pwc_frame_buf *fill_frame; /* frame currently being filled */
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struct pwc_frame_buf *read_frame; /* frame currently read by user process */
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int frame_header_size, frame_trailer_size;
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int frame_size;
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int frame_total_size; /* including header & trailer */
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int drop_frames;
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#if PWC_DEBUG
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int sequence; /* Debugging aid */
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#endif
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/* 3: decompression */
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struct pwc_decompressor *decompressor; /* function block with decompression routines */
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void *decompress_data; /* private data for decompression engine */
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/* 4: image */
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/* We have an 'image' and a 'view', where 'image' is the fixed-size image
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as delivered by the camera, and 'view' is the size requested by the
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program. The camera image is centered in this viewport, laced with
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a gray or black border. view_min <= image <= view <= view_max;
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*/
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int image_mask; /* bitmask of supported sizes */
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struct pwc_coord view_min, view_max; /* minimum and maximum viewable sizes */
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struct pwc_coord abs_max; /* maximum supported size with compression */
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struct pwc_coord image, view; /* image and viewport size */
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struct pwc_coord offset; /* offset within the viewport */
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void *image_data; /* total buffer, which is subdivided into ... */
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void *image_ptr[MAX_IMAGES]; /* ...several images... */
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int fill_image; /* ...which are rotated. */
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int len_per_image; /* length per image */
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int image_read_pos; /* In case we read data in pieces, keep track of were we are in the imagebuffer */
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int image_used[MAX_IMAGES]; /* For MCAPTURE and SYNC */
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struct semaphore modlock; /* to prevent races in video_open(), etc */
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spinlock_t ptrlock; /* for manipulating the buffer pointers */
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/*** motorized pan/tilt feature */
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struct pwc_mpt_range angle_range;
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int pan_angle; /* in degrees * 100 */
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int tilt_angle; /* absolute angle; 0,0 is home position */
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/*** Misc. data ***/
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wait_queue_head_t frameq; /* When waiting for a frame to finish... */
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#if PWC_INT_PIPE
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void *usb_int_handler; /* for the interrupt endpoint */
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#endif
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Global variable */
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extern int pwc_trace;
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/** functions in pwc-if.c */
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int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot);
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/** Functions in pwc-misc.c */
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/* sizes in pixels */
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extern struct pwc_coord pwc_image_sizes[PSZ_MAX];
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int pwc_decode_size(struct pwc_device *pdev, int width, int height);
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void pwc_construct(struct pwc_device *pdev);
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/** Functions in pwc-ctrl.c */
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/* Request a certain video mode. Returns < 0 if not possible */
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extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot);
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/* Various controls; should be obvious. Value 0..65535, or < 0 on error */
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extern int pwc_get_brightness(struct pwc_device *pdev);
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extern int pwc_set_brightness(struct pwc_device *pdev, int value);
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extern int pwc_get_contrast(struct pwc_device *pdev);
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extern int pwc_set_contrast(struct pwc_device *pdev, int value);
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extern int pwc_get_gamma(struct pwc_device *pdev);
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extern int pwc_set_gamma(struct pwc_device *pdev, int value);
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extern int pwc_get_saturation(struct pwc_device *pdev);
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extern int pwc_set_saturation(struct pwc_device *pdev, int value);
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extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
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extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);
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/* Power down or up the camera; not supported by all models */
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extern int pwc_camera_power(struct pwc_device *pdev, int power);
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/* Private ioctl()s; see pwc-ioctl.h */
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extern int pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg);
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/** pwc-uncompress.c */
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/* Expand frame to image, possibly including decompression. Uses read_frame and fill_image */
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extern int pwc_decompress(struct pwc_device *pdev);
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#ifdef __cplusplus
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}
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#endif
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#endif
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