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/mman.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <unistd.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-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 level>\tpower level of device, between %x (off) and %x (maximum)\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
  46         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");
  47         printf("\t-W <image width>\tthe width of the image to upload\n");
  48         printf("\t-H <image height>\tthe height of the image to upload\n");
  49         printf("\t-h \t\t\tthis help message\n");
  50         printf("\n\nEXAMPLE OF USE:\n");
  51         printf("\t%s -f file.jpg -F 1 -l 5 -W 800 -H 480\n", name);
  52 }
  53
  54 int main(int argc, char *argv[])
  55 {
  56         int ret;
  57         int exit_code = EXIT_SUCCESS;
  58         int opt;
  59
  60         char filename[FILENAME_MAX] = {0};
  61         int image_fd;
  62         struct stat st;
  63         am7xxx_context *ctx;
  64         am7xxx_device *dev;
  65         int log_level = AM7XXX_LOG_INFO;
  66         am7xxx_power_mode power_mode = AM7XXX_POWER_LOW;
  67         int format = AM7XXX_IMAGE_FORMAT_JPEG;
  68         int width = 800;
  69         int height = 480;
  70         unsigned char *image;
  71         unsigned int size;
  72         am7xxx_device_info device_info;
  73
  74         while ((opt = getopt(argc, argv, "f:F:l:p:W:H:h")) != -1) {
  75                 switch (opt) {
  76                 case 'f':
  77                         if (filename[0] != '\0')
  78                                 fprintf(stderr, "Warning: image file already specified\n");
  79                         strncpy(filename, optarg, FILENAME_MAX);
  80                         break;
  81                 case 'F':
  82                         format = atoi(optarg);
  83                         switch(format) {
  84                         case AM7XXX_IMAGE_FORMAT_JPEG:
  85                                 fprintf(stdout, "JPEG format\n");
  86                                 break;
  87                         case AM7XXX_IMAGE_FORMAT_NV12:
  88                                 fprintf(stdout, "NV12 format\n");
  89                                 break;
  90                         default:
  91                                 fprintf(stderr, "Unsupported format\n");
  92                                 exit(EXIT_FAILURE);
  93                         }
  94                         break;
  95                 case 'l':
  96                         log_level = atoi(optarg);
  97                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
  98                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
  99                                 log_level = AM7XXX_LOG_ERROR;
 100                         }
 101                         break;
 102                 case 'p':
 103                         power_mode = atoi(optarg);
 104                         switch(power_mode) {
 105                         case AM7XXX_POWER_OFF:
 106                         case AM7XXX_POWER_LOW:
 107                         case AM7XXX_POWER_MIDDLE:
 108                         case AM7XXX_POWER_HIGH:
 109                         case AM7XXX_POWER_TURBO:
 110                                 fprintf(stdout, "Power mode: %x\n", power_mode);
 111                                 break;
 112                         default:
 113                                 fprintf(stderr, "Invalid power mode value, must be between %x and %x\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 114                                 exit(EXIT_FAILURE);
 115                         }
 116                         break;
 117                 case 'W':
 118                         width = atoi(optarg);
 119                         if (width < 0) {
 120                                 fprintf(stderr, "Unsupported width\n");
 121                                 exit(EXIT_FAILURE);
 122                         }
 123                         break;
 124                 case 'H':
 125                         height = atoi(optarg);
 126                         if (height < 0) {
 127                                 fprintf(stderr, "Unsupported height\n");
 128                                 exit(EXIT_FAILURE);
 129                         }
 130                         break;
 131                 case 'h':
 132                         usage(argv[0]);
 133                         exit(EXIT_SUCCESS);
 134                         break;
 135                 default: /* '?' */
 136                         usage(argv[0]);
 137                         exit(EXIT_FAILURE);
 138                 }
 139         }
 140
 141         if (filename[0] == '\0') {
 142                 fprintf(stderr, "An image file MUST be specified.\n");
 143                 exit_code = EXIT_FAILURE;
 144                 goto out;
 145         }
 146
 147         image_fd = open(filename, O_RDONLY);
 148         if (image_fd < 0) {
 149                 perror("open");
 150                 exit_code = EXIT_FAILURE;
 151                 goto out;
 152         }
 153         if (fstat(image_fd, &st) < 0) {
 154                 perror("fstat");
 155                 exit_code = EXIT_FAILURE;
 156                 goto out_close_image_fd;
 157         }
 158         size = st.st_size;
 159
 160         image = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, image_fd, 0);
 161         if (image == NULL) {
 162                 perror("mmap");
 163                 exit_code = EXIT_FAILURE;
 164                 goto out_close_image_fd;
 165         }
 166
 167         ret = am7xxx_init(&ctx);
 168         if (ret < 0) {
 169                 perror("am7xxx_init");
 170                 exit_code = EXIT_FAILURE;
 171                 goto out_munmap;
 172         }
 173
 174         am7xxx_set_log_level(ctx, log_level);
 175
 176         ret = am7xxx_open_device(ctx, &dev, 0);
 177         if (ret < 0) {
 178                 perror("am7xxx_open_device");
 179                 exit_code = EXIT_FAILURE;
 180                 goto cleanup;
 181         }
 182
 183
 184         ret = am7xxx_close_device(dev);
 185         if (ret < 0) {
 186                 perror("am7xxx_close_device");
 187                 exit_code = EXIT_FAILURE;
 188                 goto cleanup;
 189         }
 190
 191         ret = am7xxx_open_device(ctx, &dev, 0);
 192         if (ret < 0) {
 193                 perror("am7xxx_open_device");
 194                 exit_code = EXIT_FAILURE;
 195                 goto cleanup;
 196         }
 197
 198         ret = am7xxx_get_device_info(dev, &device_info);
 199         if (ret < 0) {
 200                 perror("am7xxx_get_info");
 201                 exit_code = EXIT_FAILURE;
 202                 goto cleanup;
 203         }
 204         printf("Native resolution: %dx%d\n",
 205                device_info.native_width, device_info.native_height);
 206
 207         ret = am7xxx_set_power_mode(dev, power_mode);
 208         if (ret < 0) {
 209                 perror("am7xxx_set_power_mode");
 210                 exit_code = EXIT_FAILURE;
 211                 goto cleanup;
 212         }
 213
 214         if ((unsigned int)width > device_info.native_width ||
 215             (unsigned int)height > device_info.native_height)
 216                 fprintf(stderr, "WARNING: image not fitting the native resolution, it may be displayed wrongly!\n");
 217
 218         ret = am7xxx_send_image(dev, format, width, height, image, size);
 219         if (ret < 0) {
 220                 perror("am7xxx_send_image");
 221                 exit_code = EXIT_FAILURE;
 222                 goto cleanup;
 223         }
 224
 225         exit_code = EXIT_SUCCESS;
 226
 227 cleanup:
 228         am7xxx_shutdown(ctx);
 229
 230 out_munmap:
 231         ret = munmap(image, size);
 232         if (ret < 0)
 233                 perror("munmap");
 234
 235 out_close_image_fd:
 236         ret = close(image_fd);
 237         if (ret < 0)
 238                 perror("close");
 239
 240 out:
 241         exit(exit_code);
 242 }