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-d <index>\t\tthe device index (default is 0)\n");
  39         printf("\t-f <filename>\t\tthe image file to upload\n");
  40         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
  41         printf("\t\t\t\tSUPPORTED FORMATS:\n");
  42         printf("\t\t\t\t\t1 - JPEG\n");
  43         printf("\t\t\t\t\t2 - NV12\n");
  44         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
  45         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
  46                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
  47         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
  48         printf("\t\t\t\t         the slave connector to be plugged in.\n");
  49         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (test)\n",
  50                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
  51         printf("\t-W <image width>\tthe width of the image to upload\n");
  52         printf("\t-H <image height>\tthe height of the image to upload\n");
  53         printf("\t-h \t\t\tthis help message\n");
  54         printf("\n\nEXAMPLE OF USE:\n");
  55         printf("\t%s -f file.jpg -F 1 -l 5 -W 800 -H 480\n", name);
  56 }
  57
  58 int main(int argc, char *argv[])
  59 {
  60         int ret;
  61         int exit_code = EXIT_SUCCESS;
  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                                 exit(EXIT_FAILURE);
  87                         }
  88                         break;
  89                 case 'f':
  90                         if (filename[0] != '\0')
  91                                 fprintf(stderr, "Warning: image file already specified\n");
  92                         strncpy(filename, optarg, FILENAME_MAX);
  93                         break;
  94                 case 'F':
  95                         format = atoi(optarg);
  96                         switch(format) {
  97                         case AM7XXX_IMAGE_FORMAT_JPEG:
  98                                 fprintf(stdout, "JPEG format\n");
  99                                 break;
 100                         case AM7XXX_IMAGE_FORMAT_NV12:
 101                                 fprintf(stdout, "NV12 format\n");
 102                                 break;
 103                         default:
 104                                 fprintf(stderr, "Unsupported format\n");
 105                                 exit(EXIT_FAILURE);
 106                         }
 107                         break;
 108                 case 'l':
 109                         log_level = atoi(optarg);
 110                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 111                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 112                                 log_level = AM7XXX_LOG_ERROR;
 113                         }
 114                         break;
 115                 case 'p':
 116                         power_mode = atoi(optarg);
 117                         switch(power_mode) {
 118                         case AM7XXX_POWER_OFF:
 119                         case AM7XXX_POWER_LOW:
 120                         case AM7XXX_POWER_MIDDLE:
 121                         case AM7XXX_POWER_HIGH:
 122                         case AM7XXX_POWER_TURBO:
 123                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 124                                 break;
 125                         default:
 126                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 127                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 128                                 exit(EXIT_FAILURE);
 129                         }
 130                         break;
 131                 case 'z':
 132                         zoom = atoi(optarg);
 133                         switch(zoom) {
 134                         case AM7XXX_ZOOM_ORIGINAL:
 135                         case AM7XXX_ZOOM_H:
 136                         case AM7XXX_ZOOM_H_V:
 137                         case AM7XXX_ZOOM_TEST:
 138                                 fprintf(stdout, "Zoom: %d\n", zoom);
 139                                 break;
 140                         default:
 141                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 142                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
 143                                 exit(EXIT_FAILURE);
 144                         }
 145                         break;
 146                 case 'W':
 147                         width = atoi(optarg);
 148                         if (width < 0) {
 149                                 fprintf(stderr, "Unsupported width\n");
 150                                 exit(EXIT_FAILURE);
 151                         }
 152                         break;
 153                 case 'H':
 154                         height = atoi(optarg);
 155                         if (height < 0) {
 156                                 fprintf(stderr, "Unsupported height\n");
 157                                 exit(EXIT_FAILURE);
 158                         }
 159                         break;
 160                 case 'h':
 161                         usage(argv[0]);
 162                         exit(EXIT_SUCCESS);
 163                 default: /* '?' */
 164                         usage(argv[0]);
 165                         exit(EXIT_FAILURE);
 166                 }
 167         }
 168
 169         if (filename[0] == '\0') {
 170                 fprintf(stderr, "An image file MUST be specified with the -f option.\n\n");
 171                 usage(argv[0]);
 172                 exit_code = EXIT_FAILURE;
 173                 goto out;
 174         }
 175
 176         image_fp = fopen(filename, "rb");
 177         if (image_fp == NULL) {
 178                 perror("fopen");
 179                 exit_code = EXIT_FAILURE;
 180                 goto out;
 181         }
 182         if (fstat(fileno(image_fp), &st) < 0) {
 183                 perror("fstat");
 184                 exit_code = EXIT_FAILURE;
 185                 goto out_close_image_fp;
 186         }
 187         size = st.st_size;
 188
 189         image = malloc(size * sizeof(unsigned char));
 190         if (image == NULL) {
 191                 perror("malloc");
 192                 exit_code = EXIT_FAILURE;
 193                 goto out_close_image_fp;
 194         }
 195
 196         ret = (int)fread(image, size, 1, image_fp);
 197         if (ret != 1) {
 198                 if (feof(image_fp))
 199                         fprintf(stderr, "Unexpected end of file.\n");
 200                 else if (ferror(image_fp))
 201                         perror("fread");
 202                 else
 203                         fprintf(stderr, "Unexpected error condition.\n");
 204
 205                 goto out_free_image;
 206         }
 207
 208         ret = am7xxx_init(&ctx);
 209         if (ret < 0) {
 210                 perror("am7xxx_init");
 211                 exit_code = EXIT_FAILURE;
 212                 goto out_free_image;
 213         }
 214
 215         am7xxx_set_log_level(ctx, log_level);
 216
 217         ret = am7xxx_open_device(ctx, &dev, 0);
 218         if (ret < 0) {
 219                 perror("am7xxx_open_device");
 220                 exit_code = EXIT_FAILURE;
 221                 goto cleanup;
 222         }
 223
 224         ret = am7xxx_close_device(dev);
 225         if (ret < 0) {
 226                 perror("am7xxx_close_device");
 227                 exit_code = EXIT_FAILURE;
 228                 goto cleanup;
 229         }
 230
 231         ret = am7xxx_open_device(ctx, &dev, device_index);
 232         if (ret < 0) {
 233                 perror("am7xxx_open_device");
 234                 exit_code = EXIT_FAILURE;
 235                 goto cleanup;
 236         }
 237
 238         ret = am7xxx_get_device_info(dev, &device_info);
 239         if (ret < 0) {
 240                 perror("am7xxx_get_device_info");
 241                 exit_code = EXIT_FAILURE;
 242                 goto cleanup;
 243         }
 244         printf("Native resolution: %dx%d\n",
 245                device_info.native_width, device_info.native_height);
 246
 247         ret = am7xxx_set_zoom_mode(dev, zoom);
 248         if (ret < 0) {
 249                 perror("am7xxx_set_zoom_mode");
 250                 exit_code = EXIT_FAILURE;
 251                 goto cleanup;
 252         }
 253
 254         ret = am7xxx_set_power_mode(dev, power_mode);
 255         if (ret < 0) {
 256                 perror("am7xxx_set_power_mode");
 257                 exit_code = EXIT_FAILURE;
 258                 goto cleanup;
 259         }
 260
 261         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 262         if (zoom == AM7XXX_ZOOM_TEST) {
 263                 printf("AM7XXX_ZOOM_TEST requested, not sending actual image.\n");
 264                 goto cleanup;
 265         }
 266
 267         if ((unsigned int)width > device_info.native_width ||
 268             (unsigned int)height > device_info.native_height)
 269                 fprintf(stderr,
 270                         "WARNING: image is %dx%d, not fitting the native resolution, it may be displayed wrongly!\n",
 271                         width, height);
 272
 273         ret = am7xxx_send_image(dev, format, width, height, image, (unsigned int)size);
 274         if (ret < 0) {
 275                 perror("am7xxx_send_image");
 276                 exit_code = EXIT_FAILURE;
 277                 goto cleanup;
 278         }
 279
 280         exit_code = EXIT_SUCCESS;
 281
 282 cleanup:
 283         am7xxx_shutdown(ctx);
 284
 285 out_free_image:
 286         free(image);
 287
 288 out_close_image_fp:
 289         ret = fclose(image_fp);
 290         if (ret == EOF)
 291                 perror("fclose");
 292
 293 out:
 294         exit(exit_code);
 295 }