| 1 | /** |
| 2 | * Copyright (C) 2012-2013 Juho Vähä-Herttua |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining |
| 5 | * a copy of this software and associated documentation files (the |
| 6 | * "Software"), to deal in the Software without restriction, including |
| 7 | * without limitation the rights to use, copy, modify, merge, publish, |
| 8 | * distribute, sublicense, and/or sell copies of the Software, and to |
| 9 | * permit persons to whom the Software is furnished to do so, subject to |
| 10 | * the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be included |
| 13 | * in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | #include <stdlib.h> |
| 25 | #include <stdio.h> |
| 26 | #include <math.h> |
| 27 | #include <string.h> |
| 28 | #include <unistd.h> |
| 29 | #include <assert.h> |
| 30 | |
| 31 | #ifdef WIN32 |
| 32 | # include <windows.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <shairplay/dnssd.h> |
| 36 | #include <shairplay/raop.h> |
| 37 | |
| 38 | #include <ao/ao.h> |
| 39 | |
| 40 | #include "config.h" |
| 41 | |
| 42 | typedef struct { |
| 43 | char apname[56]; |
| 44 | char password[56]; |
| 45 | unsigned short port; |
| 46 | char hwaddr[6]; |
| 47 | |
| 48 | char ao_driver[56]; |
| 49 | char ao_devicename[56]; |
| 50 | char ao_deviceid[16]; |
| 51 | } shairplay_options_t; |
| 52 | |
| 53 | typedef struct { |
| 54 | ao_device *device; |
| 55 | |
| 56 | int buffering; |
| 57 | int buflen; |
| 58 | char buffer[8192]; |
| 59 | |
| 60 | float volume; |
| 61 | } shairplay_session_t; |
| 62 | |
| 63 | |
| 64 | static int running; |
| 65 | |
| 66 | #ifndef WIN32 |
| 67 | |
| 68 | #include <signal.h> |
| 69 | static void |
| 70 | signal_handler(int sig) |
| 71 | { |
| 72 | switch (sig) { |
| 73 | case SIGINT: |
| 74 | case SIGTERM: |
| 75 | running = 0; |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | static void |
| 80 | init_signals(void) |
| 81 | { |
| 82 | struct sigaction sigact; |
| 83 | |
| 84 | sigact.sa_handler = signal_handler; |
| 85 | sigemptyset(&sigact.sa_mask); |
| 86 | sigact.sa_flags = 0; |
| 87 | sigaction(SIGINT, &sigact, NULL); |
| 88 | sigaction(SIGTERM, &sigact, NULL); |
| 89 | } |
| 90 | |
| 91 | #endif |
| 92 | |
| 93 | |
| 94 | static int |
| 95 | parse_hwaddr(const char *str, char *hwaddr, int hwaddrlen) |
| 96 | { |
| 97 | int slen, i; |
| 98 | |
| 99 | slen = 3*hwaddrlen-1; |
| 100 | if (strlen(str) != slen) { |
| 101 | return 1; |
| 102 | } |
| 103 | for (i=0; i<slen; i++) { |
| 104 | if (str[i] == ':' && (i%3 == 2)) { |
| 105 | continue; |
| 106 | } |
| 107 | if (str[i] >= '0' && str[i] <= '9') { |
| 108 | continue; |
| 109 | } |
| 110 | if (str[i] >= 'a' && str[i] <= 'f') { |
| 111 | continue; |
| 112 | } |
| 113 | return 1; |
| 114 | } |
| 115 | for (i=0; i<hwaddrlen; i++) { |
| 116 | hwaddr[i] = (char) strtol(str+(i*3), NULL, 16); |
| 117 | } |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | static ao_device * |
| 122 | audio_open_device(shairplay_options_t *opt, int bits, int channels, int samplerate) |
| 123 | { |
| 124 | ao_device *device = NULL; |
| 125 | ao_option *ao_options = NULL; |
| 126 | ao_sample_format format; |
| 127 | int driver_id; |
| 128 | |
| 129 | /* Get the libao driver ID */ |
| 130 | if (strlen(opt->ao_driver)) { |
| 131 | driver_id = ao_driver_id(opt->ao_driver); |
| 132 | } else { |
| 133 | driver_id = ao_default_driver_id(); |
| 134 | } |
| 135 | |
| 136 | /* Add all available libao options */ |
| 137 | if (strlen(opt->ao_devicename)) { |
| 138 | ao_append_option(&ao_options, "dev", opt->ao_devicename); |
| 139 | } |
| 140 | if (strlen(opt->ao_deviceid)) { |
| 141 | ao_append_option(&ao_options, "id", opt->ao_deviceid); |
| 142 | } |
| 143 | |
| 144 | /* Set audio format */ |
| 145 | memset(&format, 0, sizeof(format)); |
| 146 | format.bits = bits; |
| 147 | format.channels = channels; |
| 148 | format.rate = samplerate; |
| 149 | format.byte_format = AO_FMT_NATIVE; |
| 150 | |
| 151 | /* Try opening the actual device */ |
| 152 | device = ao_open_live(driver_id, &format, ao_options); |
| 153 | ao_free_options(ao_options); |
| 154 | return device; |
| 155 | } |
| 156 | |
| 157 | static void * |
| 158 | audio_init(void *cls, int bits, int channels, int samplerate) |
| 159 | { |
| 160 | shairplay_options_t *options = cls; |
| 161 | shairplay_session_t *session; |
| 162 | |
| 163 | session = calloc(1, sizeof(shairplay_session_t)); |
| 164 | assert(session); |
| 165 | |
| 166 | session->device = audio_open_device(options, bits, channels, samplerate); |
| 167 | if (session->device == NULL) { |
| 168 | printf("Error opening device %d\n", errno); |
| 169 | } |
| 170 | assert(session->device); |
| 171 | |
| 172 | session->buffering = 1; |
| 173 | session->volume = 1.0f; |
| 174 | return session; |
| 175 | } |
| 176 | |
| 177 | static int |
| 178 | audio_output(shairplay_session_t *session, const void *buffer, int buflen) |
| 179 | { |
| 180 | short *shortbuf; |
| 181 | char tmpbuf[4096]; |
| 182 | int tmpbuflen, i; |
| 183 | |
| 184 | tmpbuflen = (buflen > sizeof(tmpbuf)) ? sizeof(tmpbuf) : buflen; |
| 185 | memcpy(tmpbuf, buffer, tmpbuflen); |
| 186 | if (ao_is_big_endian()) { |
| 187 | for (i=0; i<tmpbuflen/2; i++) { |
| 188 | char tmpch = tmpbuf[i*2]; |
| 189 | tmpbuf[i*2] = tmpbuf[i*2+1]; |
| 190 | tmpbuf[i*2+1] = tmpch; |
| 191 | } |
| 192 | } |
| 193 | shortbuf = (short *)tmpbuf; |
| 194 | for (i=0; i<tmpbuflen/2; i++) { |
| 195 | shortbuf[i] = shortbuf[i] * session->volume; |
| 196 | } |
| 197 | ao_play(session->device, tmpbuf, tmpbuflen); |
| 198 | return tmpbuflen; |
| 199 | } |
| 200 | |
| 201 | static void |
| 202 | audio_process(void *cls, void *opaque, const void *buffer, int buflen) |
| 203 | { |
| 204 | shairplay_session_t *session = opaque; |
| 205 | int processed; |
| 206 | |
| 207 | if (session->buffering) { |
| 208 | printf("Buffering...\n"); |
| 209 | if (session->buflen+buflen < sizeof(session->buffer)) { |
| 210 | memcpy(session->buffer+session->buflen, buffer, buflen); |
| 211 | session->buflen += buflen; |
| 212 | return; |
| 213 | } |
| 214 | session->buffering = 0; |
| 215 | printf("Finished buffering...\n"); |
| 216 | |
| 217 | processed = 0; |
| 218 | while (processed < session->buflen) { |
| 219 | processed += audio_output(session, |
| 220 | session->buffer+processed, |
| 221 | session->buflen-processed); |
| 222 | } |
| 223 | session->buflen = 0; |
| 224 | } |
| 225 | |
| 226 | processed = 0; |
| 227 | while (processed < buflen) { |
| 228 | processed += audio_output(session, |
| 229 | buffer+processed, |
| 230 | buflen-processed); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | static void |
| 235 | audio_destroy(void *cls, void *opaque) |
| 236 | { |
| 237 | shairplay_session_t *session = opaque; |
| 238 | |
| 239 | ao_close(session->device); |
| 240 | free(session); |
| 241 | } |
| 242 | |
| 243 | static void |
| 244 | audio_set_volume(void *cls, void *opaque, float volume) |
| 245 | { |
| 246 | shairplay_session_t *session = opaque; |
| 247 | session->volume = pow(10.0, 0.05*volume); |
| 248 | } |
| 249 | |
| 250 | static int |
| 251 | parse_options(shairplay_options_t *opt, int argc, char *argv[]) |
| 252 | { |
| 253 | const char default_hwaddr[] = { 0x48, 0x5d, 0x60, 0x7c, 0xee, 0x22 }; |
| 254 | |
| 255 | char *path = argv[0]; |
| 256 | char *arg; |
| 257 | |
| 258 | /* Set default values for apname and port */ |
| 259 | strncpy(opt->apname, "Shairplay", sizeof(opt->apname)-1); |
| 260 | opt->port = 5000; |
| 261 | memcpy(opt->hwaddr, default_hwaddr, sizeof(opt->hwaddr)); |
| 262 | |
| 263 | while ((arg = *++argv)) { |
| 264 | if (!strcmp(arg, "-a")) { |
| 265 | strncpy(opt->apname, *++argv, sizeof(opt->apname)-1); |
| 266 | } else if (!strncmp(arg, "--apname=", 9)) { |
| 267 | strncpy(opt->apname, arg+9, sizeof(opt->apname)-1); |
| 268 | } else if (!strcmp(arg, "-p")) { |
| 269 | strncpy(opt->password, *++argv, sizeof(opt->password)-1); |
| 270 | } else if (!strncmp(arg, "--password=", 11)) { |
| 271 | strncpy(opt->password, arg+11, sizeof(opt->password)-1); |
| 272 | } else if (!strcmp(arg, "-o")) { |
| 273 | opt->port = atoi(*++argv); |
| 274 | } else if (!strncmp(arg, "--server_port=", 14)) { |
| 275 | opt->port = atoi(arg+14); |
| 276 | } else if (!strncmp(arg, "--hwaddr=", 9)) { |
| 277 | if (parse_hwaddr(arg+9, opt->hwaddr, sizeof(opt->hwaddr))) { |
| 278 | fprintf(stderr, "Invalid format given for hwaddr, aborting...\n"); |
| 279 | fprintf(stderr, "Please use hwaddr format: 01:45:89:ab:cd:ef\n"); |
| 280 | return 1; |
| 281 | } |
| 282 | } else if (!strncmp(arg, "--ao_driver=", 12)) { |
| 283 | strncpy(opt->ao_driver, arg+12, sizeof(opt->ao_driver)-1); |
| 284 | } else if (!strncmp(arg, "--ao_devicename=", 16)) { |
| 285 | strncpy(opt->ao_devicename, arg+16, sizeof(opt->ao_devicename)-1); |
| 286 | } else if (!strncmp(arg, "--ao_deviceid=", 14)) { |
| 287 | strncpy(opt->ao_deviceid, arg+14, sizeof(opt->ao_deviceid)-1); |
| 288 | } else if (!strcmp(arg, "-h") || !strcmp(arg, "--help")) { |
| 289 | fprintf(stderr, "Shairplay version %s\n", VERSION); |
| 290 | fprintf(stderr, "Usage: %s [OPTION...]\n", path); |
| 291 | fprintf(stderr, "\n"); |
| 292 | fprintf(stderr, " -a, --apname=AirPort Sets Airport name\n"); |
| 293 | fprintf(stderr, " -p, --password=secret Sets password\n"); |
| 294 | fprintf(stderr, " -o, --server_port=5000 Sets port for RAOP service\n"); |
| 295 | fprintf(stderr, " --hwaddr=address Sets the MAC address, useful if running multiple instances\n"); |
| 296 | fprintf(stderr, " --ao_driver=driver Sets the ao driver (optional)\n"); |
| 297 | fprintf(stderr, " --ao_devicename=devicename Sets the ao device name (optional)\n"); |
| 298 | fprintf(stderr, " --ao_deviceid=id Sets the ao device id (optional)\n"); |
| 299 | fprintf(stderr, " -h, --help This help\n"); |
| 300 | fprintf(stderr, "\n"); |
| 301 | return 1; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | int |
| 309 | main(int argc, char *argv[]) |
| 310 | { |
| 311 | shairplay_options_t options; |
| 312 | ao_device *device = NULL; |
| 313 | |
| 314 | dnssd_t *dnssd; |
| 315 | raop_t *raop; |
| 316 | raop_callbacks_t raop_cbs; |
| 317 | char *password = NULL; |
| 318 | |
| 319 | int error; |
| 320 | |
| 321 | #ifndef WIN32 |
| 322 | init_signals(); |
| 323 | #endif |
| 324 | |
| 325 | memset(&options, 0, sizeof(options)); |
| 326 | if (parse_options(&options, argc, argv)) { |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | ao_initialize(); |
| 331 | |
| 332 | device = audio_open_device(&options, 16, 2, 44100); |
| 333 | if (device == NULL) { |
| 334 | fprintf(stderr, "Error opening audio device %d\n", errno); |
| 335 | fprintf(stderr, "Please check your libao settings and try again\n"); |
| 336 | return -1; |
| 337 | } else { |
| 338 | ao_close(device); |
| 339 | device = NULL; |
| 340 | } |
| 341 | |
| 342 | memset(&raop_cbs, 0, sizeof(raop_cbs)); |
| 343 | raop_cbs.cls = &options; |
| 344 | raop_cbs.audio_init = audio_init; |
| 345 | raop_cbs.audio_process = audio_process; |
| 346 | raop_cbs.audio_destroy = audio_destroy; |
| 347 | raop_cbs.audio_set_volume = audio_set_volume; |
| 348 | |
| 349 | raop = raop_init_from_keyfile(10, &raop_cbs, "airport.key", NULL); |
| 350 | if (raop == NULL) { |
| 351 | fprintf(stderr, "Could not initialize the RAOP service\n"); |
| 352 | fprintf(stderr, "Please make sure the airport.key file is in the current directory.\n"); |
| 353 | return -1; |
| 354 | } |
| 355 | |
| 356 | if (strlen(options.password)) { |
| 357 | password = options.password; |
| 358 | } |
| 359 | raop_set_log_level(raop, RAOP_LOG_DEBUG); |
| 360 | raop_start(raop, &options.port, options.hwaddr, sizeof(options.hwaddr), password); |
| 361 | |
| 362 | error = 0; |
| 363 | dnssd = dnssd_init(&error); |
| 364 | if (error) { |
| 365 | fprintf(stderr, "ERROR: Could not initialize dnssd library!\n"); |
| 366 | fprintf(stderr, "------------------------------------------\n"); |
| 367 | fprintf(stderr, "You could try the following resolutions based on your OS:\n"); |
| 368 | fprintf(stderr, "Windows: Try installing http://support.apple.com/kb/DL999\n"); |
| 369 | fprintf(stderr, "Debian/Ubuntu: Try installing libavahi-compat-libdnssd-dev package\n"); |
| 370 | raop_destroy(raop); |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | dnssd_register_raop(dnssd, options.apname, options.port, options.hwaddr, sizeof(options.hwaddr), 0); |
| 375 | |
| 376 | running = 1; |
| 377 | while (running) { |
| 378 | #ifndef WIN32 |
| 379 | sleep(1); |
| 380 | #else |
| 381 | Sleep(1000); |
| 382 | #endif |
| 383 | } |
| 384 | |
| 385 | dnssd_unregister_raop(dnssd); |
| 386 | dnssd_destroy(dnssd); |
| 387 | |
| 388 | raop_stop(raop); |
| 389 | raop_destroy(raop); |
| 390 | |
| 391 | ao_shutdown(); |
| 392 | |
| 393 | return 0; |
| 394 | } |