picoproj.c

   1 /* picoproj - communication with AM7xxx based USB pico projectors
   2  *
   3  * Copyright (C) 2011  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 3 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 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <stdint.h>
  22 #include <string.h>
  23 #include <endian.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26
  27 typedef enum {
  28         AM7x01_PACKET_TYPE_INIT    = 0x01,
  29         AM7x01_PACKET_TYPE_IMAGE   = 0x02,
  30         AM7x01_PACKET_TYPE_POWER   = 0x04,
  31         AM7x01_PACKET_TYPE_UNKNOWN = 0x05,
  32 } am7x01_packet_type;
  33
  34 typedef enum {
  35         AM7x01_IMAGE_FORMAT_JPEG = 1,
  36 } am7x01_image_format;
  37
  38 typedef enum {
  39         AM7x01_POWER_OFF  = 0,
  40         AM7x01_POWER_LOW  = 1,
  41         AM7x01_POWER_MID  = 2,
  42         AM7x01_POWER_HIGH = 3,
  43 } am7x01_power_mode;
  44
  45 struct image_header {
  46         uint32_t format;
  47         uint32_t width;
  48         uint32_t height;
  49         uint32_t image_size;
  50 };
  51
  52 struct power_header {
  53         uint32_t power_low;
  54         uint32_t power_mid;
  55         uint32_t power_high;
  56 };
  57
  58 /*
  59  * Examples of packet headers:
  60  *
  61  * Image widget:
  62  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  63  * +02|00|00|00|00|10|3e|10|01|00|00|00|20|03|00|00|e0|01|00|00|53|E8|00|00+
  64  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  65  *
  66  * Brightness widget:
  67  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  68  * +04|00|00|00|00|0c|ff|ff|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00+
  69  * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  70  */
  71
  72 static uint8_t reference_image_header[] = {
  73         0x02, 0x00, 0x00, 0x00,
  74         0x00,
  75         0x10,
  76         0x3e,
  77         0x10,
  78         0x01, 0x00, 0x00, 0x00,
  79         0x20, 0x03, 0x00, 0x00,
  80         0xe0, 0x01, 0x00, 0x00,
  81         0x53, 0xE8, 0x00, 0x00
  82 };
  83
  84 struct header {
  85         uint32_t packet_type;
  86         uint8_t unknown0;
  87         uint8_t header_len;
  88         uint8_t unknown2;
  89         uint8_t unknown3;
  90         union {
  91                 struct image_header image;
  92                 struct power_header power;
  93         } header_data;
  94 };
  95
  96
  97 static void dump_image_header(struct image_header *i)
  98 {
  99         if (i == NULL)
 100                 return;
 101
 102         printf("Image header:\n");
 103         printf("format:      0x%08x (%u)\n", i->format, i->format);
 104         printf("width:       0x%08x (%u)\n", i->width, i->width);
 105         printf("height:      0x%08x (%u)\n", i->height, i->height);
 106         printf("image size:  0x%08x (%u)\n", i->image_size, i->image_size);
 107 }
 108
 109 static void dump_header(struct header *h)
 110 {
 111         if (h == NULL)
 112                 return;
 113
 114         printf("packet_type: 0x%08x (%u)\n", h->packet_type, h->packet_type);
 115         printf("unknown0:    0x%02hhx (%hhu)\n", h->unknown0, h->unknown0);
 116         printf("header_len:  0x%02hhx (%hhu)\n", h->header_len, h->header_len);
 117         printf("unknown2:    0x%02hhx (%hhu)\n", h->unknown2, h->unknown2);
 118         printf("unknown3:    0x%02hhx (%hhu)\n", h->unknown3, h->unknown3);
 119
 120         switch(h->packet_type) {
 121         case AM7x01_PACKET_TYPE_IMAGE:
 122                 dump_image_header(&(h->header_data.image));
 123                 break;
 124
 125         default:
 126                 printf("Packet type not supported!\n");
 127                 break;
 128         }
 129
 130         fflush(stdout);
 131 }
 132
 133 static void dump_buffer(uint8_t *buffer, unsigned int len)
 134 {
 135         unsigned int i;
 136
 137         if (buffer == NULL || len == 0)
 138                 return;
 139
 140         for (i = 0; i < len; i++) {
 141                 printf("%02hhX%c", buffer[i], (i < len - 1) ? ' ' : '\n');
 142         }
 143         fflush(stdout);
 144 }
 145
 146 static int send_data(uint8_t *buffer, unsigned int len)
 147 {
 148         dump_buffer(buffer, len);
 149         return 0;
 150 }
 151
 152 static int send_header(struct header *h)
 153 {
 154         union {
 155                 struct header header;
 156                 uint8_t buffer[sizeof (struct header)];
 157         } data;
 158
 159         data.header = *h;
 160
 161         return send_data(data.buffer, sizeof (struct header));
 162 }
 163
 164 static int send_image(am7x01_image_format format,
 165                       unsigned int width,
 166                       unsigned int height,
 167                       uint8_t *image,
 168                       unsigned int size)
 169 {
 170         int ret;
 171         struct header h = {
 172                 .packet_type = htole32(AM7x01_PACKET_TYPE_IMAGE),
 173                 .unknown0    = 0x00,
 174                 .header_len  = sizeof(struct image_header),
 175                 .unknown2    = 0x3e,
 176                 .unknown3    = 0x10,
 177                 .header_data = {
 178                         .image = {
 179                                 .format     = htole32(format),
 180                                 .width      = htole32(width),
 181                                 .height     = htole32(height),
 182                                 .image_size = htole32(size),
 183                         },
 184                 },
 185         };
 186
 187         dump_header(&h);
 188         printf("\n");
 189
 190         printf("Dump Buffers\n");
 191         dump_buffer(reference_image_header, sizeof(struct header));
 192
 193         ret = send_header(&h);
 194         if (ret < 0)
 195                 return ret;
 196
 197         if (image == NULL || size == 0)
 198                 return 0;
 199
 200         return send_data(image, size);
 201 }
 202
 203 static void usage(char *name)
 204 {
 205         printf("usage: %s [OPTIONS]\n\n", name);
 206         printf("OPTIONS:\n");
 207         printf("\t-f <filename>\t\tthe image file to upload\n");
 208         printf("\t-F <format>\t\tthe image format to use (default is JPEG).\n");
 209         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 210         printf("\t\t\t\t\t1 - JPEG\n");
 211         printf("\t-W <image width>\tthe width of the image to upload\n");
 212         printf("\t-H <image height>\tthe height of the image to upload\n");
 213         printf("\t-h \t\t\tthis help message\n");
 214 }
 215
 216 int main(int argc, char *argv[])
 217 {
 218         int ret;
 219         int opt;
 220
 221         char filename[FILENAME_MAX] = {0};
 222         int format = AM7x01_IMAGE_FORMAT_JPEG;
 223         int width = 800;
 224         int height = 480;
 225         uint8_t *image = NULL;
 226         int size = 59475;
 227
 228         while ((opt = getopt(argc, argv, "f:F:W:H:h")) != -1) {
 229                 switch (opt) {
 230                 case 'f':
 231                         strncpy(filename, optarg, FILENAME_MAX);
 232                         break;
 233                 case 'F':
 234                         format = atoi(optarg);
 235                         if (format != 1) {
 236                                 fprintf(stderr, "Unsupported format\n");
 237                                 exit(EXIT_FAILURE);
 238                         }
 239                         break;
 240                 case 'W':
 241                         width = atoi(optarg);
 242                         if (width < 0) {
 243                                 fprintf(stderr, "Unsupported width\n");
 244                                 exit(EXIT_FAILURE);
 245                         }
 246                         break;
 247                 case 'H':
 248                         height = atoi(optarg);
 249                         if (height < 0) {
 250                                 fprintf(stderr, "Unsupported height\n");
 251                                 exit(EXIT_FAILURE);
 252                         }
 253                         break;
 254                 default: /* '?' */
 255                         usage(argv[0]);
 256                         exit(EXIT_FAILURE);
 257                 }
 258         }
 259
 260         ret = send_image(format, width, height, image, size);
 261         if (ret < 0) {
 262                 perror("send_image");
 263                 exit(EXIT_FAILURE);
 264         }
 265
 266         exit(EXIT_SUCCESS);
 267 }