79927c2dd46c5ade69df7cda170fbb3ce684e09f
[libam7xxx.git] / 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_device_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 }