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
  32 #include "am7xxx.h"
  33
  34 static void usage(char *name)
  35 {
  36         printf("usage: %s [OPTIONS]\n\n", name);
  37         printf("OPTIONS:\n");
  38         printf("\t-f <filename>\t\tthe image file to upload\n");
  39         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
  40         printf("\t\t\t\tSUPPORTED FORMATS:\n");
  41         printf("\t\t\t\t\t1 - JPEG\n");
  42         printf("\t\t\t\t\t2 - NV12\n");
  43         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
  44         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
  45                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
  46         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
  47         printf("\t\t\t\t         the slave connector to be plugged in.\n");
  48         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (test)\n",
  49                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
  50         printf("\t-W <image width>\tthe width of the image to upload\n");
  51         printf("\t-H <image height>\tthe height of the image to upload\n");
  52         printf("\t-h \t\t\tthis help message\n");
  53         printf("\n\nEXAMPLE OF USE:\n");
  54         printf("\t%s -f file.jpg -F 1 -l 5 -W 800 -H 480\n", name);
  55 }
  56
  57 int main(int argc, char *argv[])
  58 {
  59         int ret;
  60         int exit_code = EXIT_SUCCESS;
  61         int opt;
  62
  63         char filename[FILENAME_MAX] = {0};
  64         FILE *image_fp;
  65         struct stat st;
  66         am7xxx_context *ctx;
  67         am7xxx_device *dev;
  68         int log_level = AM7XXX_LOG_INFO;
  69         am7xxx_power_mode power_mode = AM7XXX_POWER_LOW;
  70         am7xxx_zoom_mode zoom = AM7XXX_ZOOM_ORIGINAL;
  71         int format = AM7XXX_IMAGE_FORMAT_JPEG;
  72         int width = 800;
  73         int height = 480;
  74         unsigned char *image;
  75         unsigned int size;
  76         am7xxx_device_info device_info;
  77
  78         while ((opt = getopt(argc, argv, "f:F:l:p:z:W:H:h")) != -1) {
  79                 switch (opt) {
  80                 case 'f':
  81                         if (filename[0] != '\0')
  82                                 fprintf(stderr, "Warning: image file already specified\n");
  83                         strncpy(filename, optarg, FILENAME_MAX);
  84                         break;
  85                 case 'F':
  86                         format = atoi(optarg);
  87                         switch(format) {
  88                         case AM7XXX_IMAGE_FORMAT_JPEG:
  89                                 fprintf(stdout, "JPEG format\n");
  90                                 break;
  91                         case AM7XXX_IMAGE_FORMAT_NV12:
  92                                 fprintf(stdout, "NV12 format\n");
  93                                 break;
  94                         default:
  95                                 fprintf(stderr, "Unsupported format\n");
  96                                 exit(EXIT_FAILURE);
  97                         }
  98                         break;
  99                 case 'l':
 100                         log_level = atoi(optarg);
 101                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 102                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 103                                 log_level = AM7XXX_LOG_ERROR;
 104                         }
 105                         break;
 106                 case 'p':
 107                         power_mode = atoi(optarg);
 108                         switch(power_mode) {
 109                         case AM7XXX_POWER_OFF:
 110                         case AM7XXX_POWER_LOW:
 111                         case AM7XXX_POWER_MIDDLE:
 112                         case AM7XXX_POWER_HIGH:
 113                         case AM7XXX_POWER_TURBO:
 114                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 115                                 break;
 116                         default:
 117                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 118                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 119                                 exit(EXIT_FAILURE);
 120                         }
 121                         break;
 122                 case 'z':
 123                         zoom = atoi(optarg);
 124                         switch(zoom) {
 125                         case AM7XXX_ZOOM_ORIGINAL:
 126                         case AM7XXX_ZOOM_H:
 127                         case AM7XXX_ZOOM_H_V:
 128                         case AM7XXX_ZOOM_TEST:
 129                                 fprintf(stdout, "Zoom: %d\n", zoom);
 130                                 break;
 131                         default:
 132                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 133                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
 134                                 exit(EXIT_FAILURE);
 135                         }
 136                         break;
 137                 case 'W':
 138                         width = atoi(optarg);
 139                         if (width < 0) {
 140                                 fprintf(stderr, "Unsupported width\n");
 141                                 exit(EXIT_FAILURE);
 142                         }
 143                         break;
 144                 case 'H':
 145                         height = atoi(optarg);
 146                         if (height < 0) {
 147                                 fprintf(stderr, "Unsupported height\n");
 148                                 exit(EXIT_FAILURE);
 149                         }
 150                         break;
 151                 case 'h':
 152                         usage(argv[0]);
 153                         exit(EXIT_SUCCESS);
 154                         break;
 155                 default: /* '?' */
 156                         usage(argv[0]);
 157                         exit(EXIT_FAILURE);
 158                 }
 159         }
 160
 161         if (filename[0] == '\0') {
 162                 fprintf(stderr, "An image file MUST be specified.\n");
 163                 exit_code = EXIT_FAILURE;
 164                 goto out;
 165         }
 166
 167         image_fp = fopen(filename, "rb");
 168         if (image_fp == NULL) {
 169                 perror("fopen");
 170                 exit_code = EXIT_FAILURE;
 171                 goto out;
 172         }
 173         if (fstat(fileno(image_fp), &st) < 0) {
 174                 perror("fstat");
 175                 exit_code = EXIT_FAILURE;
 176                 goto out_close_image_fp;
 177         }
 178         size = st.st_size;
 179
 180         image = malloc(size * sizeof(unsigned char));
 181         if (image == NULL) {
 182                 perror("malloc");
 183                 exit_code = EXIT_FAILURE;
 184                 goto out_close_image_fp;
 185         }
 186
 187         ret = fread(image, size, 1, image_fp);
 188         if (ret != 1) {
 189                 if (feof(image_fp))
 190                         fprintf(stderr, "Unexpected end of file.\n");
 191                 else if (ferror(image_fp))
 192                         perror("fread");
 193                 else
 194                         fprintf(stderr, "Unexpected error condition.\n");
 195
 196                 goto out_free_image;
 197         }
 198
 199         ret = am7xxx_init(&ctx);
 200         if (ret < 0) {
 201                 perror("am7xxx_init");
 202                 exit_code = EXIT_FAILURE;
 203                 goto out_free_image;
 204         }
 205
 206         am7xxx_set_log_level(ctx, log_level);
 207
 208         ret = am7xxx_open_device(ctx, &dev, 0);
 209         if (ret < 0) {
 210                 perror("am7xxx_open_device");
 211                 exit_code = EXIT_FAILURE;
 212                 goto cleanup;
 213         }
 214
 215
 216         ret = am7xxx_close_device(dev);
 217         if (ret < 0) {
 218                 perror("am7xxx_close_device");
 219                 exit_code = EXIT_FAILURE;
 220                 goto cleanup;
 221         }
 222
 223         ret = am7xxx_open_device(ctx, &dev, 0);
 224         if (ret < 0) {
 225                 perror("am7xxx_open_device");
 226                 exit_code = EXIT_FAILURE;
 227                 goto cleanup;
 228         }
 229
 230         ret = am7xxx_get_device_info(dev, &device_info);
 231         if (ret < 0) {
 232                 perror("am7xxx_get_device_info");
 233                 exit_code = EXIT_FAILURE;
 234                 goto cleanup;
 235         }
 236         printf("Native resolution: %dx%d\n",
 237                device_info.native_width, device_info.native_height);
 238
 239         ret = am7xxx_set_zoom_mode(dev, zoom);
 240         if (ret < 0) {
 241                 perror("am7xxx_set_zoom_mode");
 242                 exit_code = EXIT_FAILURE;
 243                 goto cleanup;
 244         }
 245
 246         ret = am7xxx_set_power_mode(dev, power_mode);
 247         if (ret < 0) {
 248                 perror("am7xxx_set_power_mode");
 249                 exit_code = EXIT_FAILURE;
 250                 goto cleanup;
 251         }
 252
 253         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 254         if (zoom == AM7XXX_ZOOM_TEST)
 255                 goto cleanup;
 256
 257
 258         if ((unsigned int)width > device_info.native_width ||
 259             (unsigned int)height > device_info.native_height)
 260                 fprintf(stderr, "WARNING: image not fitting the native resolution, it may be displayed wrongly!\n");
 261
 262         ret = am7xxx_send_image(dev, format, width, height, image, size);
 263         if (ret < 0) {
 264                 perror("am7xxx_send_image");
 265                 exit_code = EXIT_FAILURE;
 266                 goto cleanup;
 267         }
 268
 269         exit_code = EXIT_SUCCESS;
 270
 271 cleanup:
 272         am7xxx_shutdown(ctx);
 273
 274 out_free_image:
 275         free(image);
 276
 277 out_close_image_fp:
 278         ret = fclose(image_fp);
 279         if (ret == EOF)
 280                 perror("fclose");
 281
 282 out:
 283         exit(exit_code);
 284 }