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Diffstat (limited to 'share/examples/meteor/yuvpl.c')
| -rw-r--r-- | share/examples/meteor/yuvpl.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/share/examples/meteor/yuvpl.c b/share/examples/meteor/yuvpl.c new file mode 100644 index 0000000..243644d --- /dev/null +++ b/share/examples/meteor/yuvpl.c @@ -0,0 +1,138 @@ +/* capture a PPM image using YUV planer format and single capture mode */ +/* Copyright (c) 1995 Mark Tinguely and Jim Lowe + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Mark Tinguely and Jim Lowe + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/fcntl.h> +/*#include <machine/ioctl_meteor.h>*/ +#include "/sys/i386/include/ioctl_meteor.h" + + +typedef unsigned char uint8; +typedef signed char int8; + +static uint8 *yuv_data; +static int8 *ue, *uo, *ve, *vo; +extern int errno; +#define ROWS 480 +#define COLS 640 +#define SIZE (ROWS * COLS * 2) +main() +{ + struct meteor_geomet geo; + char b[4],header[16],*p; + int i,o,c,r; + int y1,y2,u,v; + int temp; + + if ((i = open("/dev/meteor", O_RDONLY)) < 0) { + printf("open failed: %d\n", errno); + exit(1); + } + /* set up the capture type and size */ + geo.rows = ROWS; + geo.columns = COLS; + geo.frames = 1; + + + geo.oformat = METEOR_GEO_YUV_PLANER; + + if (ioctl(i, METEORSETGEO, &geo) < 0) { + printf("ioctl failed: %d\n", errno); + exit(1); + } + + c = METEOR_FMT_NTSC; + + if (ioctl(i, METEORSFMT, &c) < 0) { + printf("ioctl failed: %d\n", errno); + exit(1); + } + + c = METEOR_INPUT_DEV0; + + if (ioctl(i, METEORSINPUT, &c) < 0) { + printf("ioctl failed: %d\n", errno); + exit(1); + } + + yuv_data = (uint8 *)mmap((caddr_t)0,SIZE,PROT_READ,0, i, (off_t)0); + + if (yuv_data == (uint8 *) -1) return (0); + + temp = ROWS * COLS; + ue = yuv_data + temp; + temp = temp / 4; + ve = ue + temp; + uo = ve + temp; + vo = uo + temp; + +printf("data locations = %08x %08x %08x %08x %08x \n", yuv_data,ue,ve,uo,vo); + + c = METEOR_CAP_SINGLE ; + ioctl(i, METEORCAPTUR, &c); + + printf("read done %d %d\n", errno, i); + if ((o = open("yuvpl.ppm", O_WRONLY | O_CREAT, 0644)) < 0) { + printf("ppm open failed: %d\n", errno); + exit(1); + } + + /* make PPM header and save to file */ + strcpy(&header[0], "P6 640 480 255 "); + header[2] = header[6] = header[10] = header[14] = '\n'; + write (o, &header[0], 15); + + for (r = 0 ; r < ROWS ; r++) { + for (c = 0 ; c < COLS / 2; c++) { + if ((y1 = *yuv_data++) < 0) y1 += 256; + if ((y2 = *yuv_data++) < 0) y2 += 256; + if (r & 1) { /* odd */ + u = *uo++ ; + v = *vo++; + } + else { /* even */ + u = *ue++; + v = *ve++; + } + b[0]= (double)y1 + 1.375 * (double)v ; /*r*/ + b[1]= (double)y1 - 0.703125 * (double)v -0.34375 * (double)u ; /* g */ + b[2]= (double)y1 + 1.734375 * (double)u ; /* b */ + b[3]= (double)y2 + 1.375 * (double)v ; /*r*/ + b[4]= (double)y2 - 0.703125 * (double)v -0.34375 * (double)u ; /* g */ + b[5]= (double)y2 + 1.734375 * (double)u ; /* b */ + write(o,&b[0], 6); + } + } + close(o); + close(i); + exit(0); +} |
