examples/picoproj.c

   1 /* picoproj - test program for libam7xxx
   2  *
   3  * Copyright (C) 2012  Antonio Ospite <ospite@studenti.unina.it>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 /**
  20  * @example examples/picoproj.c
  21  * A minimal example to show how to use libam7xxx to display a static image.
  22  */
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <fcntl.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32
  33 #include "am7xxx.h"
  34
  35 static void usage(char *name)
  36 {
  37         printf("usage: %s [OPTIONS]\n\n", name);
  38         printf("OPTIONS:\n");
  39         printf("\t-d <index>\t\tthe device index (default is 0)\n");
  40         printf("\t-f <filename>\t\tthe image file to upload\n");
  41         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
  42         printf("\t\t\t\tSUPPORTED FORMATS:\n");
  43         printf("\t\t\t\t\t1 - JPEG\n");
  44         printf("\t\t\t\t\t2 - NV12\n");
  45         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
  46         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
  47                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
  48         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
  49         printf("\t\t\t\t         the slave connector to be plugged in.\n");
  50         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
  51                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
  52         printf("\t-W <image width>\tthe width of the image to upload\n");
  53         printf("\t-H <image height>\tthe height of the image to upload\n");
  54         printf("\t-h \t\t\tthis help message\n");
  55         printf("\n\nEXAMPLE OF USE:\n");
  56         printf("\t%s -f file.jpg -F 1 -l 5 -W 800 -H 480\n", name);
  57 }
  58
  59 int main(int argc, char *argv[])
  60 {
  61         int ret;
  62         int opt;
  63
  64         char filename[FILENAME_MAX] = {0};
  65         FILE *image_fp;
  66         struct stat st;
  67         am7xxx_context *ctx;
  68         am7xxx_device *dev;
  69         int log_level = AM7XXX_LOG_INFO;
  70         int device_index = 0;
  71         int power_mode = AM7XXX_POWER_LOW;
  72         int zoom = AM7XXX_ZOOM_ORIGINAL;
  73         int format = AM7XXX_IMAGE_FORMAT_JPEG;
  74         int width = 800;
  75         int height = 480;
  76         unsigned char *image;
  77         off_t size;
  78         am7xxx_device_info device_info;
  79
  80         while ((opt = getopt(argc, argv, "d:f:F:l:p:z:W:H:h")) != -1) {
  81                 switch (opt) {
  82                 case 'd':
  83                         device_index = atoi(optarg);
  84                         if (device_index < 0) {
  85                                 fprintf(stderr, "Unsupported device index\n");
  86                                 ret = -EINVAL;
  87                                 goto out;
  88                         }
  89                         break;
  90                 case 'f':
  91                         if (filename[0] != '\0')
  92                                 fprintf(stderr, "Warning: image file already specified\n");
  93                         strncpy(filename, optarg, FILENAME_MAX);
  94                         break;
  95                 case 'F':
  96                         format = atoi(optarg);
  97                         switch(format) {
  98                         case AM7XXX_IMAGE_FORMAT_JPEG:
  99                                 fprintf(stdout, "JPEG format\n");
 100                                 break;
 101                         case AM7XXX_IMAGE_FORMAT_NV12:
 102                                 fprintf(stdout, "NV12 format\n");
 103                                 break;
 104                         default:
 105                                 fprintf(stderr, "Unsupported format\n");
 106                                 ret = -EINVAL;
 107                                 goto out;
 108                         }
 109                         break;
 110                 case 'l':
 111                         log_level = atoi(optarg);
 112                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 113                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 114                                 log_level = AM7XXX_LOG_ERROR;
 115                         }
 116                         break;
 117                 case 'p':
 118                         power_mode = atoi(optarg);
 119                         switch(power_mode) {
 120                         case AM7XXX_POWER_OFF:
 121                         case AM7XXX_POWER_LOW:
 122                         case AM7XXX_POWER_MIDDLE:
 123                         case AM7XXX_POWER_HIGH:
 124                         case AM7XXX_POWER_TURBO:
 125                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 126                                 break;
 127                         default:
 128                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 129                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 130                                 ret = -EINVAL;
 131                                 goto out;
 132                         }
 133                         break;
 134                 case 'z':
 135                         zoom = atoi(optarg);
 136                         switch(zoom) {
 137                         case AM7XXX_ZOOM_ORIGINAL:
 138                         case AM7XXX_ZOOM_H:
 139                         case AM7XXX_ZOOM_H_V:
 140                         case AM7XXX_ZOOM_TEST:
 141                         case AM7XXX_ZOOM_TELE:
 142                                 fprintf(stdout, "Zoom: %d\n", zoom);
 143                                 break;
 144                         default:
 145                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 146                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 147                                 ret = -EINVAL;
 148                                 goto out;
 149                         }
 150                         break;
 151                 case 'W':
 152                         width = atoi(optarg);
 153                         if (width < 0) {
 154                                 fprintf(stderr, "Unsupported width\n");
 155                                 ret = -EINVAL;
 156                                 goto out;
 157                         }
 158                         break;
 159                 case 'H':
 160                         height = atoi(optarg);
 161                         if (height < 0) {
 162                                 fprintf(stderr, "Unsupported height\n");
 163                                 ret = -EINVAL;
 164                                 goto out;
 165                         }
 166                         break;
 167                 case 'h':
 168                         usage(argv[0]);
 169                         ret = 0;
 170                         goto out;
 171                 default: /* '?' */
 172                         usage(argv[0]);
 173                         ret = -EINVAL;
 174                         goto out;
 175                 }
 176         }
 177
 178         if (filename[0] == '\0') {
 179                 fprintf(stderr, "An image file MUST be specified with the -f option.\n\n");
 180                 usage(argv[0]);
 181                 ret = -EINVAL;
 182                 goto out;
 183         }
 184
 185         image_fp = fopen(filename, "rb");
 186         if (image_fp == NULL) {
 187                 perror("fopen");
 188                 ret = -EINVAL;
 189                 goto out;
 190         }
 191         ret = fstat(fileno(image_fp), &st);
 192         if (ret < 0) {
 193                 perror("fstat");
 194                 goto out_close_image_fp;
 195         }
 196         size = st.st_size;
 197
 198         image = malloc(size * sizeof(unsigned char));
 199         if (image == NULL) {
 200                 perror("malloc");
 201                 ret = -ENOMEM;
 202                 goto out_close_image_fp;
 203         }
 204
 205         ret = (int)fread(image, size, 1, image_fp);
 206         if (ret != 1) {
 207                 if (feof(image_fp))
 208                         fprintf(stderr, "Unexpected end of file.\n");
 209                 else if (ferror(image_fp))
 210                         perror("fread");
 211                 else
 212                         fprintf(stderr, "Unexpected error condition.\n");
 213
 214                 if (ret >= 0)
 215                         ret = -EINVAL;
 216                 goto out_free_image;
 217         }
 218
 219         ret = am7xxx_init(&ctx);
 220         if (ret < 0) {
 221                 perror("am7xxx_init");
 222                 goto out_free_image;
 223         }
 224
 225         am7xxx_set_log_level(ctx, log_level);
 226
 227         ret = am7xxx_open_device(ctx, &dev, 0);
 228         if (ret < 0) {
 229                 perror("am7xxx_open_device");
 230                 goto cleanup;
 231         }
 232
 233         ret = am7xxx_close_device(dev);
 234         if (ret < 0) {
 235                 perror("am7xxx_close_device");
 236                 goto cleanup;
 237         }
 238
 239         ret = am7xxx_open_device(ctx, &dev, device_index);
 240         if (ret < 0) {
 241                 perror("am7xxx_open_device");
 242                 goto cleanup;
 243         }
 244
 245         ret = am7xxx_get_device_info(dev, &device_info);
 246         if (ret < 0) {
 247                 perror("am7xxx_get_device_info");
 248                 goto cleanup;
 249         }
 250         printf("Native resolution: %dx%d\n",
 251                device_info.native_width, device_info.native_height);
 252
 253         ret = am7xxx_set_zoom_mode(dev, zoom);
 254         if (ret < 0) {
 255                 perror("am7xxx_set_zoom_mode");
 256                 goto cleanup;
 257         }
 258
 259         ret = am7xxx_set_power_mode(dev, power_mode);
 260         if (ret < 0) {
 261                 perror("am7xxx_set_power_mode");
 262                 goto cleanup;
 263         }
 264
 265         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 266         if (zoom == AM7XXX_ZOOM_TEST) {
 267                 printf("AM7XXX_ZOOM_TEST requested, not sending actual image.\n");
 268                 goto cleanup;
 269         }
 270
 271         if ((unsigned int)width > device_info.native_width ||
 272             (unsigned int)height > device_info.native_height)
 273                 fprintf(stderr,
 274                         "WARNING: image is %dx%d, not fitting the native resolution, it may be displayed wrongly!\n",
 275                         width, height);
 276
 277         ret = am7xxx_send_image(dev, format, width, height, image, (unsigned int)size);
 278         if (ret < 0) {
 279                 perror("am7xxx_send_image");
 280                 goto cleanup;
 281         }
 282
 283         ret = 0;
 284
 285 cleanup:
 286         am7xxx_shutdown(ctx);
 287
 288 out_free_image:
 289         free(image);
 290
 291 out_close_image_fp:
 292         if (fclose(image_fp) == EOF)
 293                 perror("fclose");
 294
 295 out:
 296         return ret;
 297 }