a3118e8c68
- Use MAP_FAILED instead of the constant -1 to indicate
failure (required by POSIX).
- Removed flag arguments of '0' (required by POSIX).
- Fixed code which expected an error return of 0.
- Fixed code which thought any address with the high bit set
was an error.
- Check for failure where no checks were present.
Discussed with: bde
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/* capture a PPM image using YUV packed format and single capture mode */
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/* Copyright (c) 1995 Mark Tinguely and Jim Lowe
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Mark Tinguely and Jim Lowe
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/fcntl.h>
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/*#include <machine/ioctl_meteor.h>*/
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#include "/sys/i386/include/ioctl_meteor.h"
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typedef unsigned char uint8;
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typedef signed char int8;
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static int8 *yuv_data;
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extern int errno;
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#define ROWS 480
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#define COLS 640
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#define SIZE (ROWS * COLS * 2)
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main()
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{
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struct meteor_geomet geo;
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char b[4],header[16],*p;
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int i,o,c,r;
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int y1,y2,u,v;
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if ((i = open("/dev/meteor", O_RDONLY)) < 0) {
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printf("open failed: %d\n", errno);
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exit(1);
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}
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/* set up the capture type and size */
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geo.rows = ROWS;
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geo.columns = COLS;
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geo.frames = 1;
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geo.oformat = METEOR_GEO_YUV_PACKED;
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if (ioctl(i, METEORSETGEO, &geo) < 0) {
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printf("ioctl failed: %d\n", errno);
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exit(1);
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}
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c = METEOR_FMT_NTSC;
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if (ioctl(i, METEORSFMT, &c) < 0) {
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printf("ioctl failed: %d\n", errno);
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exit(1);
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}
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c = METEOR_INPUT_DEV0;
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if (ioctl(i, METEORSINPUT, &c) < 0) {
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printf("ioctl failed: %d\n", errno);
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exit(1);
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}
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yuv_data = (uint8 *)mmap((caddr_t)0,SIZE,PROT_READ,MAP_SHARED, i, (off_t)0);
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if (yuv_data == (int8 *) MAP_FAILED) return (0);
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c = METEOR_CAP_SINGLE ;
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ioctl(i, METEORCAPTUR, &c);
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if ((o = open("yuvpk.ppm", O_WRONLY | O_CREAT, 0644)) < 0) {
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printf("ppm open failed: %d\n", errno);
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exit(1);
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}
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/* make PPM header and save to file */
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strcpy(&header[0], "P6 640 480 255 ");
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header[2] = header[6] = header[10] = header[14] = '\n';
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write (o, &header[0], 15);
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for (c = 0 ; c < ROWS*COLS; c+=2) {
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u = *yuv_data++;
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if ((y1 = *yuv_data++) < 0) y1 += 256;
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v = *yuv_data++;
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if ((y2 = *yuv_data++) < 0) y2 += 256;
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b[0]= (double)y1 + 1.375 * (double)v ; /*r*/
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b[1]= (double)y1 - 0.703125 * (double)v -0.34375 * (double)u ; /* g */
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b[2]= (double)y1 + 1.734375 * (double)u ; /* b */
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b[3]= (double)y2 + 1.375 * (double)v ; /*r*/
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b[4]= (double)y2 - 0.703125 * (double)v -0.34375 * (double)u ; /* g */
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b[5]= (double)y2 + 1.734375 * (double)u ; /* b */
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write(o,&b[0], 6);
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}
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close(o);
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close(i);
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exit(0);
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}
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