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