1 /*
2 * Starts the AirPlay server (name "FakePort") and dumps the received contents
3 * to files:
4 * - audio.pcm : decoded audio content
5 * - metadata.bin : meta data
6 * - covertart.jpg : cover art
7 *
8 * Requires avahi-daemon to run. Also requires file "airplay.key" in the same directory.
9 *
10 * Compile with: gcc -o example -g -I../../include/shairplay example.c -lshairplay
11 */
12
13 #include <stdlib.h>
14 #include <stdio.h>
15 #include <unistd.h>
16
17 #ifdef WIN32
18 #include <windows.h>
19 #endif
20
21 #include "dnssd.h"
22 #include "raop.h"
23
24 static int running;
25
26 #ifndef WIN32
27
28 #include <signal.h>
29 static void
signal_handler(int sig)30 signal_handler(int sig)
31 {
32 switch (sig) {
33 case SIGINT:
34 case SIGTERM:
35 running = 0;
36 break;
37 }
38 }
39 static void
init_signals(void)40 init_signals(void)
41 {
42 struct sigaction sigact;
43
44 sigact.sa_handler = signal_handler;
45 sigemptyset(&sigact.sa_mask);
46 sigact.sa_flags = 0;
47 sigaction(SIGINT, &sigact, NULL);
48 sigaction(SIGTERM, &sigact, NULL);
49 }
50
51 #endif
52
53 static void *
audio_init(void * cls,int bits,int channels,int samplerate)54 audio_init(void *cls, int bits, int channels, int samplerate)
55 {
56 return fopen("audio.pcm", "wb");
57 }
58
59 static void
audio_set_volume(void * cls,void * session,float volume)60 audio_set_volume(void *cls, void *session, float volume)
61 {
62 printf("Setting volume to %f\n", volume);
63 }
64
65 static void
audio_set_metadata(void * cls,void * session,const void * buffer,int buflen)66 audio_set_metadata(void *cls, void *session, const void *buffer, int buflen)
67 {
68 int orig = buflen;
69 FILE *file = fopen("metadata.bin", "wb");
70 while (buflen > 0) {
71 buflen -= fwrite(buffer+orig-buflen, 1, buflen, file);
72 }
73 fclose(file);
74 printf("Metadata of length %d saved as metadata.bin\n", orig);
75 }
76
77 static void
audio_set_coverart(void * cls,void * session,const void * buffer,int buflen)78 audio_set_coverart(void *cls, void *session, const void *buffer, int buflen)
79 {
80 int orig = buflen;
81 FILE *file = fopen("coverart.jpg", "wb");
82 while (buflen > 0) {
83 buflen -= fwrite(buffer+orig-buflen, 1, buflen, file);
84 }
85 fclose(file);
86 printf("Coverart of length %d saved as coverart.jpg\n", orig);
87 }
88
89 static void
audio_process(void * cls,void * session,const void * buffer,int buflen)90 audio_process(void *cls, void *session, const void *buffer, int buflen)
91 {
92 int orig = buflen;
93 while (buflen > 0) {
94 buflen -= fwrite(buffer+orig-buflen, 1, buflen, session);
95 }
96 }
97
98 static void
audio_flush(void * cls,void * session)99 audio_flush(void *cls, void *session)
100 {
101 printf("Flushing audio\n");
102 }
103
104 static void
audio_destroy(void * cls,void * session)105 audio_destroy(void *cls, void *session)
106 {
107 fclose(session);
108 }
109
110 static void
raop_log_callback(void * cls,int level,const char * msg)111 raop_log_callback(void *cls, int level, const char *msg)
112 {
113 printf("RAOP LOG(%d): %s\n", level, msg);
114 }
115
116 int
main(int argc,char * argv[])117 main(int argc, char *argv[])
118 {
119 const char *name = "FakePort";
120 unsigned short raop_port = 5000;
121 const char hwaddr[] = { 0x48, 0x5d, 0x60, 0x7c, 0xee, 0x22 };
122
123 dnssd_t *dnssd;
124 raop_t *raop;
125 raop_callbacks_t raop_cbs;
126
127 int error;
128
129 raop_cbs.cls = NULL;
130 raop_cbs.audio_init = audio_init;
131 raop_cbs.audio_set_volume = audio_set_volume;
132 raop_cbs.audio_set_metadata = audio_set_metadata;
133 raop_cbs.audio_set_coverart = audio_set_coverart;
134 raop_cbs.audio_process = audio_process;
135 raop_cbs.audio_flush = audio_flush;
136 raop_cbs.audio_destroy = audio_destroy;
137
138 raop = raop_init_from_keyfile(10, &raop_cbs, "airport.key", NULL);
139 if (raop == NULL) {
140 fprintf(stderr, "Could not initialize the RAOP service (airport.key missing?)\n");
141 return -1;
142 }
143
144 raop_set_log_level(raop, RAOP_LOG_DEBUG);
145 raop_set_log_callback(raop, &raop_log_callback, NULL);
146 raop_start(raop, &raop_port, hwaddr, sizeof(hwaddr), NULL);
147
148 error = 0;
149 dnssd = dnssd_init(&error);
150 if (error) {
151 fprintf(stderr, "ERROR: Could not initialize dnssd library!\n");
152 fprintf(stderr, "------------------------------------------\n");
153 fprintf(stderr, "You could try the following resolutions based on your OS:\n");
154 fprintf(stderr, "Windows: Try installing http://support.apple.com/kb/DL999\n");
155 fprintf(stderr, "Debian/Ubuntu: Try installing libavahi-compat-libdnssd-dev package\n");
156 raop_destroy(raop);
157 return -1;
158 }
159
160 dnssd_register_raop(dnssd, name, raop_port, hwaddr, sizeof(hwaddr), 1);
161
162 printf("Startup complete... Kill with Ctrl+C\n");
163
164 running = 1;
165 while (running != 0) {
166 #ifndef WIN32
167 sleep(1);
168 #else
169 Sleep(1000);
170 #endif
171 }
172
173 dnssd_unregister_raop(dnssd);
174 dnssd_destroy(dnssd);
175
176 raop_stop(raop);
177 raop_destroy(raop);
178
179 return 0;
180 }
181
182