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