I have decided to venture into new teritory. I downloaded a driver (hopefully) for my webcam. The tar -xed file contains a bunch of c and header programs. I need to know what to do. These are the programs that I am talking about: knoppix@bmike1:~/Downloads/nthr cam/pwc-8.11/2.4.21$ ls ls pwc-ctrl.c pwc-ioctl.h pwc-uncompress.c pwc.h pwc_nala.h pwc-if.c pwc-misc.c pwc-uncompress.h pwc_kiara.h pwc_timon.h One that I find particularly interesting is the pwc-uncompress.c because (though I am inexperienced) I think that it will uncompress all the other programs contained with it; however, I am unsure. Could someone teach me what I need to know and how to run gcc? -- <:-)~MIKE~(-:> pss I just read through the code and it seems as if only the .c program starts another program. So what I am thinking is that I will have to gcc each individual program. Is this a correct assumption? ps The text of the 'uncompress' files follow: ///////////////////////////////////////////////// .h~\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ /* (C) 1999-2003 Nemosoft Unv. (webcam@smcc.demon.nl) 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 */ /* This file is the bridge between the kernel module and the plugin; it describes the structures and datatypes used in both modules. Any significant change should be reflected by increasing the pwc_decompressor_version major number. */ #ifndef PWC_UNCOMPRESS_H #define PWC_UNCOMPRESS_H #include #include #include "pwc.h" #ifdef __cplusplus extern "C" { #endif /* The decompressor structure. Every type of decompressor registers itself with the main module. When a device is opened, it looks up the correct compressor, and uses that when a compressed video mode is requested. */ struct pwc_decompressor { int type; /* type of camera (645, 680, etc) */ int table_size; /* memory needed */ void (* init)(int release, void *buffer, void *table); /* Initialization routine; should be called after each set_video_mode */ void (* exit)(void); /* Cleanup routine */ void (* decompress)(struct pwc_coord *image, struct pwc_coord *view, struct pwc_coord *offset, void *src, void *dst, int planar, void *table, int bandlength); void (* lock)(void); /* make sure module cannot be unloaded */ void (* unlock)(void); /* release lock on module */ struct list_head pwcd_list; }; /* Our structure version number. Is set to the version number major */ extern const int pwc_decompressor_version; /* Adds decompressor to list, based on its 'type' field (which matches the 'type' field in pwc_device; ignores any double requests */ extern void pwc_register_decompressor(struct pwc_decompressor *pwcd); /* Removes decompressor, based on the type number */ extern void pwc_unregister_decompressor(int type); /* Returns pointer to decompressor struct, or NULL if it doesn't exist */ extern struct pwc_decompressor *pwc_find_decompressor(int type); #ifdef CONFIG_USB_PWCX /* If the decompressor is compiled in, we must call these manually */ extern int usb_pwcx_init(void); extern void usb_pwcx_exit(void); #endif #ifdef __cplusplus } #endif #endif ///////////////////////////////////////////////// .c~\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ /* Linux driver for Philips webcam Decompression frontend. (C) 1999-2003 Nemosoft Unv. (webcam@smcc.demon.nl) 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 */ /* This is where the decompression routines register and unregister themselves. It also has a decompressor wrapper function. */ #include #include "pwc.h" #include "pwc-uncompress.h" /* This contains a list of all registered decompressors */ static LIST_HEAD(pwc_decompressor_list); /* Should the pwc_decompress structure ever change, we increase the version number so that we don't get nasty surprises, or can dynamically adjust our structure. */ const int pwc_decompressor_version = PWC_MAJOR; /* Add decompressor to list, ignoring duplicates */ void pwc_register_decompressor(struct pwc_decompressor *pwcd) { if (pwc_find_decompressor(pwcd->type) == NULL) { Trace(TRACE_PWCX, "Adding decompressor for model %d.\n", pwcd->type); list_add_tail(&pwcd->pwcd_list, &pwc_decompressor_list); } } /* Remove decompressor from list */ void pwc_unregister_decompressor(int type) { struct pwc_decompressor *find; find = pwc_find_decompressor(type); if (find != NULL) { Trace(TRACE_PWCX, "Removing decompressor for model %d.\n", type); list_del(&find->pwcd_list); } } /* Find decompressor in list */ struct pwc_decompressor *pwc_find_decompressor(int type) { struct list_head *tmp; struct pwc_decompressor *pwcd; list_for_each(tmp, &pwc_decompressor_list) { pwcd = list_entry(tmp, struct pwc_decompressor, pwcd_list); if (pwcd->type == type) return pwcd; } return NULL; } int pwc_decompress(struct pwc_device *pdev) { struct pwc_frame_buf *fbuf; int n, line, col, stride; void *yuv, *image; u16 *src; u16 *dsty, *dstu, *dstv; if (pdev == NULL) return -EFAULT; #if defined(__KERNEL__) && defined(PWC_MAGIC) if (pdev->magic != PWC_MAGIC) { Err("pwc_decompress(): magic failed.\n"); return -EFAULT; } #endif fbuf = pdev->read_frame; if (fbuf == NULL) return -EFAULT; image = pdev->image_ptr[pdev->fill_image]; if (!image) return -EFAULT; yuv = fbuf->data + pdev->frame_header_size; /* Skip header */ if (pdev->vbandlength == 0) { /* Uncompressed mode. We copy the data into the output buffer, using the viewport size (which may be larger than the image size). Unfortunately we have to do a bit of byte stuffing to get the desired output format/size. */ /* * We do some byte shuffling here to go from the * native format to YUV420P. */ src = (u16 *)yuv; n = pdev->view.x * pdev->view.y; /* offset in Y plane */ stride = pdev->view.x * pdev->offset.y + pdev->offset.x; dsty = (u16 *)(image + stride); /* offsets in U/V planes */ stride = pdev->view.x * pdev->offset.y / 4 + pdev->offset.x / 2; dstu = (u16 *)(image + n + stride); dstv = (u16 *)(image + n + n / 4 + stride); /* increment after each line */ stride = (pdev->view.x - pdev->image.x) / 2; /* u16 is 2 bytes */ for (line = 0; line < pdev->image.y; line++) { for (col = 0; col < pdev->image.x; col += 4) { *dsty++ = *src++; *dsty++ = *src++; if (line & 1) *dstv++ = *src++; else *dstu++ = *src++; } dsty += stride; if (line & 1) dstv += (stride >> 1); else dstu += (stride >> 1); } } else { /* Compressed; the decompressor routines will write the data in planar format immediately. */ if (pdev->decompressor) pdev->decompressor->decompress( &pdev->image, &pdev->view, &pdev->offset, yuv, image, 1, pdev->decompress_data, pdev->vbandlength); else return -ENXIO; /* No such device or address: missing decompressor */ } return 0; } /* Make sure these functions are available for the decompressor plugin both when this code is compiled into the kernel or as as module. */ EXPORT_SYMBOL_NOVERS(pwc_decompressor_version); EXPORT_SYMBOL(pwc_register_decompressor); EXPORT_SYMBOL(pwc_unregister_decompressor);