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                         strncpy(filename, optarg, FILENAME_MAX);
  78                         break;
  79                 case 'F':
  80                         format = atoi(optarg);
  81                         switch(format) {
  82                         case AM7XXX_IMAGE_FORMAT_JPEG:
  83                                 fprintf(stdout, "JPEG format\n");
  84                                 break;
  85                         case AM7XXX_IMAGE_FORMAT_NV12:
  86                                 fprintf(stdout, "NV12 format\n");
  87                                 break;
  88                         default:
  89                                 fprintf(stderr, "Unsupported format\n");
  90                                 exit(EXIT_FAILURE);
  91                         }
  92                         break;
  93                 case 'l':
  94                         log_level = atoi(optarg);
  95                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
  96                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
  97                                 log_level = AM7XXX_LOG_ERROR;
  98                         }
  99                         break;
 100                 case 'p':
 101                         power_mode = atoi(optarg);
 102                         switch(power_mode) {
 103                         case AM7XXX_POWER_OFF:
 104                         case AM7XXX_POWER_LOW:
 105                         case AM7XXX_POWER_MIDDLE:
 106                         case AM7XXX_POWER_HIGH:
 107                         case AM7XXX_POWER_TURBO:
 108                                 fprintf(stdout, "Power mode: %x\n", power_mode);
 109                                 break;
 110                         default:
 111                                 fprintf(stderr, "Invalid power mode value, must be between %x and %x\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 112                                 exit(EXIT_FAILURE);
 113                         }
 114                         break;
 115                 case 'W':
 116                         width = atoi(optarg);
 117                         if (width < 0) {
 118                                 fprintf(stderr, "Unsupported width\n");
 119                                 exit(EXIT_FAILURE);
 120                         }
 121                         break;
 122                 case 'H':
 123                         height = atoi(optarg);
 124                         if (height < 0) {
 125                                 fprintf(stderr, "Unsupported height\n");
 126                                 exit(EXIT_FAILURE);
 127                         }
 128                         break;
 129                 case 'h':
 130                         usage(argv[0]);
 131                         exit(EXIT_SUCCESS);
 132                         break;
 133                 default: /* '?' */
 134                         usage(argv[0]);
 135                         exit(EXIT_FAILURE);
 136                 }
 137         }
 138
 139         if (filename[0] == '\0') {
 140                 fprintf(stderr, "An image file MUST be specified.\n");
 141                 exit_code = EXIT_FAILURE;
 142                 goto out;
 143         }
 144
 145         image_fd = open(filename, O_RDONLY);
 146         if (image_fd < 0) {
 147                 perror("open");
 148                 exit_code = EXIT_FAILURE;
 149                 goto out;
 150         }
 151         if (fstat(image_fd, &st) < 0) {
 152                 perror("fstat");
 153                 exit_code = EXIT_FAILURE;
 154                 goto out_close_image_fd;
 155         }
 156         size = st.st_size;
 157
 158         image = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, image_fd, 0);
 159         if (image == NULL) {
 160                 perror("mmap");
 161                 exit_code = EXIT_FAILURE;
 162                 goto out_close_image_fd;
 163         }
 164
 165         ret = am7xxx_init(&ctx);
 166         if (ret < 0) {
 167                 perror("am7xxx_init");
 168                 exit_code = EXIT_FAILURE;
 169                 goto out_munmap;
 170         }
 171
 172         am7xxx_set_log_level(ctx, log_level);
 173
 174         ret = am7xxx_open_device(ctx, &dev, 0);
 175         if (ret < 0) {
 176                 perror("am7xxx_open_device");
 177                 exit_code = EXIT_FAILURE;
 178                 goto cleanup;
 179         }
 180
 181
 182         ret = am7xxx_close_device(dev);
 183         if (ret < 0) {
 184                 perror("am7xxx_close_device");
 185                 exit_code = EXIT_FAILURE;
 186                 goto cleanup;
 187         }
 188
 189         ret = am7xxx_open_device(ctx, &dev, 0);
 190         if (ret < 0) {
 191                 perror("am7xxx_open_device");
 192                 exit_code = EXIT_FAILURE;
 193                 goto cleanup;
 194         }
 195
 196         ret = am7xxx_get_device_info(dev, &device_info);
 197         if (ret < 0) {
 198                 perror("am7xxx_get_info");
 199                 exit_code = EXIT_FAILURE;
 200                 goto cleanup;
 201         }
 202         printf("Native resolution: %dx%d\n",
 203                device_info.native_width, device_info.native_height);
 204
 205         ret = am7xxx_set_power_mode(dev, power_mode);
 206         if (ret < 0) {
 207                 perror("am7xxx_set_power_mode");
 208                 exit_code = EXIT_FAILURE;
 209                 goto cleanup;
 210         }
 211
 212         if ((unsigned int)width > device_info.native_width ||
 213             (unsigned int)height > device_info.native_height)
 214                 fprintf(stderr, "WARNING: image not fitting the native resolution, it may be displayed wrongly!\n");
 215
 216         ret = am7xxx_send_image(dev, format, width, height, image, size);
 217         if (ret < 0) {
 218                 perror("am7xxx_send_image");
 219                 exit_code = EXIT_FAILURE;
 220                 goto cleanup;
 221         }
 222
 223         exit_code = EXIT_SUCCESS;
 224
 225 cleanup:
 226         am7xxx_shutdown(ctx);
 227
 228 out_munmap:
 229         ret = munmap(image, size);
 230         if (ret < 0)
 231                 perror("munmap");
 232
 233 out_close_image_fd:
 234         ret = close(image_fd);
 235         if (ret < 0)
 236                 perror("close");
 237
 238 out:
 239         exit(exit_code);
 240 }