doorbell
view doorbelld/src/main.c @ 7:dc4018af3a40
video broadcast with UDP. retarded amount of data, unusable.
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Wed, 16 Mar 2016 02:50:30 +0200 |
| parents | f21ae31ef0e7 |
| children |
line source
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <errno.h>
5 #include <signal.h>
6 #include <pthread.h>
7 #include <wcam.h>
8 #include "srv.h"
10 void *frame_proc(void *arg);
11 int save_image(const char *fname, unsigned char *pixels, int xsz, int ysz);
12 void sighandler(int s);
13 int parse_args(int argc, char **argv);
15 const char *devfile = "/dev/video0";
16 int fd = -1;
17 int port = 2828;
18 int width = 320;
19 int height = 240;
20 int framerate = 15;
21 unsigned char *frame;
22 int done;
23 int frame_available;
24 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
25 pthread_cond_t condvar = PTHREAD_COND_INITIALIZER;
27 int main(int argc, char **argv)
28 {
29 pthread_t thread;
31 if(parse_args(argc, argv) == -1) {
32 return 1;
33 }
35 signal(SIGINT, sighandler);
36 signal(SIGQUIT, sighandler);
37 signal(SIGSEGV, sighandler);
39 if(srv_init(port) == -1) {
40 return 1;
41 }
43 if(!(frame = malloc(width * height * 4))) {
44 perror("failed to allocate frame");
45 return 1;
46 }
47 if(devfile) {
48 if((fd = wcam_open(devfile, width, height, framerate)) == -1) {
49 fprintf(stderr, "failed to open video device: %s\n", devfile);
50 return 1;
51 }
52 wcam_start(fd);
53 } else {
54 int i, j;
55 unsigned char *pptr = frame;
56 for(i=0; i<height; i++) {
57 for(j=0; j<width; j++) {
58 int p = (i ^ j) & 0xff;
59 pptr[0] = p;
60 pptr[1] = p << 1;
61 pptr[2] = p << 2;
62 pptr[3] = 255;
63 pptr += 4;
64 }
65 }
66 printf("serving test pattern\n");
67 }
69 if(pthread_create(&thread, 0, frame_proc, 0) == -1) {
70 fprintf(stderr, "failed to create frame processing thread\n");
71 return 1;
72 }
74 while(!done) {
75 int i, res;
76 int *sock = srv_sockets();
77 int num_sockets = srv_num_sockets();
78 int maxfd = srv_max_socket();
79 fd_set rdset;
81 FD_ZERO(&rdset);
83 if(fd != -1) {
84 if(fd > maxfd) maxfd = fd;
85 FD_SET(fd, &rdset);
86 }
88 for(i=0; i<num_sockets; i++) {
89 FD_SET(sock[i], &rdset);
90 }
92 while((res = select(maxfd + 1, &rdset, 0, 0, 0)) == -1 &&
93 errno == EINTR && !done);
94 if(done) break;
95 if(res == -1) {
96 fprintf(stderr, "unexpected failure while waiting for I/O\n");
97 break;
98 }
100 if(fd != -1 && FD_ISSET(fd, &rdset)) {
101 wcam_wait(fd);
102 pthread_mutex_lock(&mutex);
103 frame_available = 1;
104 pthread_mutex_unlock(&mutex);
105 pthread_cond_signal(&condvar);
106 }
108 for(i=0; i<num_sockets; i++) {
109 if(FD_ISSET(sock[i], &rdset)) {
110 srv_handle(sock[i]);
111 if(fd == -1) {
112 pthread_mutex_lock(&mutex);
113 frame_available = 1;
114 pthread_mutex_unlock(&mutex);
115 pthread_cond_signal(&condvar);
116 }
117 }
118 }
119 }
121 frame_available = 1;
122 pthread_cond_signal(&condvar);
123 pthread_join(thread, 0);
124 free(frame);
125 if(fd != -1) {
126 wcam_stop(fd);
127 wcam_close(fd);
128 }
129 return 0;
130 }
132 void *frame_proc(void *arg)
133 {
134 for(;;) {
135 pthread_mutex_lock(&mutex);
136 while(!frame_available) {
137 pthread_cond_wait(&condvar, &mutex);
138 }
139 frame_available = 0;
140 pthread_mutex_unlock(&mutex);
142 if(done) break;
144 if(fd != -1) {
145 wcam_read_frame_rgb(fd, frame);
146 /*save_image("output.ppm", frame, width, height);*/
147 }
148 srv_send_frame(frame, width, height);
149 }
150 return 0;
151 }
153 int save_image(const char *fname, unsigned char *pixels, int xsz, int ysz)
154 {
155 int i, num_pixels = xsz * ysz;
156 FILE *fp = fopen(fname, "wb");
157 if(!fp) return -1;
159 fprintf(fp, "P6\n%d %d\n255\n", xsz, ysz);
160 for(i=0; i<num_pixels; i++) {
161 fputc(*pixels++, fp);
162 fputc(*pixels++, fp);
163 fputc(*pixels++, fp);
164 ++pixels;
165 }
166 fclose(fp);
167 return 0;
168 }
170 void sighandler(int s)
171 {
172 done = 1;
173 }
175 void print_usage(const char *argv0)
176 {
177 printf("Usage: %s [options]\n", argv0);
178 printf("options:\n");
179 printf(" -s,-size <WxH>\n");
180 printf(" -f,-fps <framerate>\n");
181 printf(" -d,-device <devfile>\n");
182 printf(" -p,-port <port>\n");
183 printf(" -novideo\n");
184 printf(" -h,-help\n");
185 }
187 int parse_args(int argc, char **argv)
188 {
189 int i;
191 for(i=1; i<argc; i++) {
192 if(argv[i][0] == '-') {
193 if(strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "-size") == 0) {
194 if(sscanf(argv[++i], "%dx%d", &width, &height) != 2) {
195 fprintf(stderr, "invalid size specified: %s\n", argv[i - 1]);
196 return -1;
197 }
198 } else if(strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "-fps") == 0) {
199 framerate = atoi(argv[++i]);
200 if(framerate <= 0) {
201 fprintf(stderr, "invalid framerate specified: %s\n", argv[i - 1]);
202 return -1;
203 }
204 } else if(strcmp(argv[i], "-novideo") == 0) {
205 devfile = 0;
206 } else if(strcmp(argv[i], "-d") == 0 || strcmp(argv[i], "-device") == 0) {
207 devfile = argv[++i];
208 } else if(strcmp(argv[i], "-p") == 0 || strcmp(argv[i], "-port") == 0) {
209 port = atoi(argv[++i]);
210 if(port <= 0 || port >= 65535) {
211 fprintf(stderr, "invalid port specified: %s\n", argv[i - 1]);
212 return -1;
213 }
214 } else {
215 int help = strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "-help") == 0;
216 if(!help) fprintf(stderr, "unrecognized option: %s\n", argv[i]);
217 print_usage(argv[0]);
218 exit(help ? 0 : 1);
219 }
220 } else {
221 fprintf(stderr, "unexpected argument: %s\n", argv[i]);
222 print_usage(argv[0]);
223 return -1;
224 }
225 }
226 return 0;
227 }