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e83d0967 RK |
1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2007 Richard Kettlewell | |
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, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * 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, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
24 | #include <getopt.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <sys/socket.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/socket.h> | |
30 | #include <netdb.h> | |
31 | #include <pthread.h> | |
0b75463f | 32 | #include <locale.h> |
e83d0967 RK |
33 | |
34 | #include "log.h" | |
35 | #include "mem.h" | |
36 | #include "configuration.h" | |
37 | #include "addr.h" | |
38 | #include "syscalls.h" | |
39 | #include "rtp.h" | |
0b75463f | 40 | #include "defs.h" |
e83d0967 RK |
41 | |
42 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
43 | # include <CoreAudio/AudioHardware.h> | |
44 | #endif | |
0b75463f | 45 | #if API_ALSA |
46 | #include <alsa/asoundlib.h> | |
47 | #endif | |
e83d0967 | 48 | |
1153fd23 | 49 | #define readahead linux_headers_are_borked |
50 | ||
0b75463f | 51 | /** @brief RTP socket */ |
e83d0967 RK |
52 | static int rtpfd; |
53 | ||
0b75463f | 54 | /** @brief Output device */ |
55 | static const char *device; | |
56 | ||
57 | /** @brief Maximum samples per packet we'll support | |
58 | * | |
59 | * NB that two channels = two samples in this program. | |
60 | */ | |
61 | #define MAXSAMPLES 2048 | |
62 | ||
63 | /** @brief Minimum buffer size | |
64 | * | |
65 | * We'll stop playing if there's only this many samples in the buffer. */ | |
1153fd23 | 66 | static unsigned minbuffer = 2 * 44100 / 10; /* 0.2 seconds */ |
0b75463f | 67 | |
68 | /** @brief Maximum sample size | |
69 | * | |
70 | * The maximum supported size (in bytes) of one sample. */ | |
71 | #define MAXSAMPLESIZE 2 | |
72 | ||
1153fd23 | 73 | /** @brief Buffer size |
74 | * | |
75 | * We'll only start playing when this many samples are available. */ | |
76 | static unsigned readahead = 4 * 2 * 44100; /* 4 seconds */ | |
0b75463f | 77 | |
e83d0967 RK |
78 | #define MAXBUFFER (3 * 88200) /* maximum buffer contents */ |
79 | ||
0b75463f | 80 | /** @brief Received packet |
81 | * | |
82 | * Packets are recorded in an ordered linked list. */ | |
83 | struct packet { | |
84 | /** @brief Pointer to next packet | |
85 | * The next packet might not be immediately next: if packets are dropped | |
86 | * or mis-ordered there may be gaps at any given moment. */ | |
87 | struct packet *next; | |
88 | /** @brief Number of samples in this packet */ | |
89 | int nsamples; | |
90 | /** @brief Number of samples used from this packet */ | |
91 | int nused; | |
92 | /** @brief Timestamp from RTP packet | |
93 | * | |
94 | * NB that "timestamps" are really sample counters.*/ | |
95 | uint32_t timestamp; | |
e83d0967 | 96 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H |
0b75463f | 97 | /** @brief Converted sample data */ |
98 | float samples_float[MAXSAMPLES]; | |
99 | #else | |
100 | /** @brief Raw sample data */ | |
101 | unsigned char samples_raw[MAXSAMPLES * MAXSAMPLESIZE]; | |
e83d0967 RK |
102 | #endif |
103 | }; | |
104 | ||
0b75463f | 105 | /** @brief Total number of samples available */ |
106 | static unsigned long nsamples; | |
107 | ||
108 | /** @brief Linked list of packets | |
109 | * | |
110 | * In ascending order of timestamp. */ | |
111 | static struct packet *packets; | |
112 | ||
113 | /** @brief Timestamp of next packet to play. | |
114 | * | |
115 | * This is set to the timestamp of the last packet, plus the number of | |
09ee2f0d | 116 | * samples it contained. Only valid if @ref active is nonzero. |
0b75463f | 117 | */ |
118 | static uint32_t next_timestamp; | |
e83d0967 | 119 | |
09ee2f0d | 120 | /** @brief True if actively playing |
121 | * | |
122 | * This is true when playing and false when just buffering. */ | |
123 | static int active; | |
124 | ||
0b75463f | 125 | /** @brief Lock protecting @ref packets */ |
e83d0967 | 126 | static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
e83d0967 | 127 | |
0b75463f | 128 | /** @brief Condition variable signalled whenever @ref packets is changed */ |
129 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; | |
e83d0967 RK |
130 | |
131 | static const struct option options[] = { | |
132 | { "help", no_argument, 0, 'h' }, | |
133 | { "version", no_argument, 0, 'V' }, | |
134 | { "debug", no_argument, 0, 'd' }, | |
0b75463f | 135 | { "device", required_argument, 0, 'D' }, |
1153fd23 | 136 | { "min", required_argument, 0, 'm' }, |
137 | { "buffer", required_argument, 0, 'b' }, | |
e83d0967 RK |
138 | { 0, 0, 0, 0 } |
139 | }; | |
140 | ||
0b75463f | 141 | /** @brief Return true iff a < b in sequence-space arithmetic */ |
09ee2f0d | 142 | static inline int lt(uint32_t a, uint32_t b) { |
143 | return (uint32_t)(a - b) & 0x80000000; | |
e83d0967 RK |
144 | } |
145 | ||
09ee2f0d | 146 | /** @brief Background thread collecting samples |
0b75463f | 147 | * |
148 | * This function collects samples, perhaps converts them to the target format, | |
149 | * and adds them to the packet list. */ | |
150 | static void *listen_thread(void attribute((unused)) *arg) { | |
09ee2f0d | 151 | struct packet *p = 0, **pp; |
0b75463f | 152 | int n; |
e83d0967 RK |
153 | union { |
154 | struct rtp_header header; | |
155 | uint8_t bytes[sizeof(uint16_t) * MAXSAMPLES + sizeof (struct rtp_header)]; | |
156 | } packet; | |
157 | const uint16_t *const samples = (uint16_t *)(packet.bytes | |
158 | + sizeof (struct rtp_header)); | |
159 | ||
160 | for(;;) { | |
09ee2f0d | 161 | if(!p) |
162 | p = xmalloc(sizeof *p); | |
e83d0967 RK |
163 | n = read(rtpfd, packet.bytes, sizeof packet.bytes); |
164 | if(n < 0) { | |
165 | switch(errno) { | |
166 | case EINTR: | |
167 | continue; | |
168 | default: | |
169 | fatal(errno, "error reading from socket"); | |
170 | } | |
171 | } | |
0b75463f | 172 | /* Ignore too-short packets */ |
173 | if((size_t)n <= sizeof (struct rtp_header)) | |
174 | continue; | |
09ee2f0d | 175 | p->nused = 0; |
176 | p->timestamp = ntohl(packet.header.timestamp); | |
177 | /* Ignore packets in the past */ | |
178 | if(active && lt(p->timestamp, next_timestamp)) | |
179 | continue; | |
e83d0967 | 180 | /* Convert to target format */ |
0b75463f | 181 | switch(packet.header.mpt & 0x7F) { |
e83d0967 | 182 | case 10: |
09ee2f0d | 183 | p->nsamples = (n - sizeof (struct rtp_header)) / sizeof(uint16_t); |
0b75463f | 184 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H |
185 | /* Convert to what Core Audio expects */ | |
09ee2f0d | 186 | for(n = 0; n < p->nsamples; ++n) |
187 | p->samples_float[n] = (int16_t)ntohs(samples[n]) * (0.5f / 32767); | |
0b75463f | 188 | #else |
189 | /* ALSA can do any necessary conversion itself (though it might be better | |
190 | * to do any necessary conversion in the background) */ | |
09ee2f0d | 191 | memcpy(p->samples_raw, samples, n - sizeof (struct rtp_header)); |
0b75463f | 192 | #endif |
e83d0967 RK |
193 | break; |
194 | /* TODO support other RFC3551 media types (when the speaker does) */ | |
195 | default: | |
0b75463f | 196 | fatal(0, "unsupported RTP payload type %d", |
e83d0967 RK |
197 | packet.header.mpt & 0x7F); |
198 | } | |
e83d0967 | 199 | pthread_mutex_lock(&lock); |
0b75463f | 200 | /* Stop reading if we've reached the maximum. |
201 | * | |
202 | * This is rather unsatisfactory: it means that if packets get heavily | |
203 | * out of order then we guarantee dropouts. But for now... */ | |
e83d0967 RK |
204 | while(nsamples >= MAXBUFFER) |
205 | pthread_cond_wait(&cond, &lock); | |
09ee2f0d | 206 | for(pp = &packets; |
207 | *pp && lt((*pp)->timestamp, p->timestamp); | |
208 | pp = &(*pp)->next) | |
e83d0967 | 209 | ; |
09ee2f0d | 210 | /* So now either !*pp or *pp >= p */ |
211 | if(*pp && p->timestamp == (*pp)->timestamp) { | |
212 | /* *pp == p; a duplicate. Ideally we avoid the translation step here, | |
0b75463f | 213 | * but we'll worry about that another time. */ |
0b75463f | 214 | } else { |
09ee2f0d | 215 | p->next = *pp; |
216 | *pp = p; | |
217 | nsamples += p->nsamples; | |
0b75463f | 218 | pthread_cond_broadcast(&cond); |
09ee2f0d | 219 | p = 0; /* we've consumed this packet */ |
0b75463f | 220 | } |
e83d0967 | 221 | pthread_mutex_unlock(&lock); |
e83d0967 RK |
222 | } |
223 | } | |
224 | ||
225 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
09ee2f0d | 226 | /** @brief Callback from Core Audio */ |
e83d0967 RK |
227 | static OSStatus adioproc(AudioDeviceID inDevice, |
228 | const AudioTimeStamp *inNow, | |
229 | const AudioBufferList *inInputData, | |
230 | const AudioTimeStamp *inInputTime, | |
231 | AudioBufferList *outOutputData, | |
232 | const AudioTimeStamp *inOutputTime, | |
233 | void *inClientData) { | |
234 | UInt32 nbuffers = outOutputData->mNumberBuffers; | |
235 | AudioBuffer *ab = outOutputData->mBuffers; | |
236 | float *samplesOut; /* where to write samples to */ | |
237 | size_t samplesOutLeft; /* space left */ | |
238 | size_t samplesInLeft; | |
239 | size_t samplesToCopy; | |
240 | ||
0b75463f | 241 | pthread_mutex_lock(&lock); |
e83d0967 RK |
242 | samplesOut = ab->data; |
243 | samplesOutLeft = ab->mDataByteSize / sizeof (float); | |
0b75463f | 244 | while(packets && nbuffers > 0) { |
245 | if(packets->used == packets->nsamples) { | |
e83d0967 | 246 | /* TODO if we dropped a packet then we should introduce a gap here */ |
09ee2f0d | 247 | struct packet *const p = packets; |
248 | packets = p->next; | |
249 | free(p); | |
e83d0967 RK |
250 | pthread_cond_broadcast(&cond); |
251 | continue; | |
252 | } | |
253 | if(samplesOutLeft == 0) { | |
254 | --nbuffers; | |
255 | ++ab; | |
256 | samplesOut = ab->data; | |
257 | samplesOutLeft = ab->mDataByteSize / sizeof (float); | |
258 | continue; | |
259 | } | |
260 | /* Now: (1) there is some data left to read | |
261 | * (2) there is some space to put it */ | |
0b75463f | 262 | samplesInLeft = packets->nsamples - packets->used; |
e83d0967 RK |
263 | samplesToCopy = (samplesInLeft < samplesOutLeft |
264 | ? samplesInLeft : samplesOutLeft); | |
0b75463f | 265 | memcpy(samplesOut, packet->samples + packets->used, samplesToCopy); |
266 | packets->used += samplesToCopy; | |
e83d0967 RK |
267 | samplesOut += samplesToCopy; |
268 | samesOutLeft -= samplesToCopy; | |
269 | } | |
270 | pthread_mutex_unlock(&lock); | |
271 | return 0; | |
272 | } | |
273 | #endif | |
274 | ||
09ee2f0d | 275 | /** @brief Play an RTP stream |
276 | * | |
277 | * This is the guts of the program. It is responsible for: | |
278 | * - starting the listening thread | |
279 | * - opening the audio device | |
280 | * - reading ahead to build up a buffer | |
281 | * - arranging for audio to be played | |
282 | * - detecting when the buffer has got too small and re-buffering | |
283 | */ | |
0b75463f | 284 | static void play_rtp(void) { |
285 | pthread_t ltid; | |
e83d0967 RK |
286 | |
287 | /* We receive and convert audio data in a background thread */ | |
0b75463f | 288 | pthread_create(<id, 0, listen_thread, 0); |
e83d0967 | 289 | #if API_ALSA |
0b75463f | 290 | { |
291 | snd_pcm_t *pcm; | |
292 | snd_pcm_hw_params_t *hwparams; | |
293 | snd_pcm_sw_params_t *swparams; | |
294 | /* Only support one format for now */ | |
295 | const int sample_format = SND_PCM_FORMAT_S16_BE; | |
296 | unsigned rate = 44100; | |
297 | const int channels = 2; | |
298 | const int samplesize = channels * sizeof(uint16_t); | |
299 | snd_pcm_uframes_t pcm_bufsize = MAXSAMPLES * samplesize * 3; | |
300 | /* If we can write more than this many samples we'll get a wakeup */ | |
301 | const int avail_min = 256; | |
302 | snd_pcm_sframes_t frames_written; | |
303 | size_t samples_written; | |
304 | int prepared = 1; | |
305 | int err; | |
ed13cbc8 | 306 | int infilling = 0; |
0b75463f | 307 | |
308 | /* Open ALSA */ | |
309 | if((err = snd_pcm_open(&pcm, | |
310 | device ? device : "default", | |
311 | SND_PCM_STREAM_PLAYBACK, | |
312 | SND_PCM_NONBLOCK))) | |
313 | fatal(0, "error from snd_pcm_open: %d", err); | |
314 | /* Set up 'hardware' parameters */ | |
315 | snd_pcm_hw_params_alloca(&hwparams); | |
316 | if((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0) | |
317 | fatal(0, "error from snd_pcm_hw_params_any: %d", err); | |
318 | if((err = snd_pcm_hw_params_set_access(pcm, hwparams, | |
319 | SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) | |
320 | fatal(0, "error from snd_pcm_hw_params_set_access: %d", err); | |
321 | if((err = snd_pcm_hw_params_set_format(pcm, hwparams, | |
322 | sample_format)) < 0) | |
323 | fatal(0, "error from snd_pcm_hw_params_set_format (%d): %d", | |
324 | sample_format, err); | |
325 | if((err = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rate, 0)) < 0) | |
326 | fatal(0, "error from snd_pcm_hw_params_set_rate (%d): %d", | |
327 | rate, err); | |
328 | if((err = snd_pcm_hw_params_set_channels(pcm, hwparams, | |
329 | channels)) < 0) | |
330 | fatal(0, "error from snd_pcm_hw_params_set_channels (%d): %d", | |
331 | channels, err); | |
332 | if((err = snd_pcm_hw_params_set_buffer_size_near(pcm, hwparams, | |
333 | &pcm_bufsize)) < 0) | |
334 | fatal(0, "error from snd_pcm_hw_params_set_buffer_size (%d): %d", | |
335 | MAXSAMPLES * samplesize * 3, err); | |
336 | if((err = snd_pcm_hw_params(pcm, hwparams)) < 0) | |
337 | fatal(0, "error calling snd_pcm_hw_params: %d", err); | |
338 | /* Set up 'software' parameters */ | |
339 | snd_pcm_sw_params_alloca(&swparams); | |
340 | if((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) | |
341 | fatal(0, "error calling snd_pcm_sw_params_current: %d", err); | |
342 | if((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) | |
343 | fatal(0, "error calling snd_pcm_sw_params_set_avail_min %d: %d", | |
344 | avail_min, err); | |
345 | if((err = snd_pcm_sw_params(pcm, swparams)) < 0) | |
346 | fatal(0, "error calling snd_pcm_sw_params: %d", err); | |
347 | ||
348 | /* Ready to go */ | |
349 | ||
350 | pthread_mutex_lock(&lock); | |
351 | for(;;) { | |
352 | /* Wait for the buffer to fill up a bit */ | |
ed13cbc8 | 353 | info("Buffering..."); |
1153fd23 | 354 | while(nsamples < readahead) |
0b75463f | 355 | pthread_cond_wait(&cond, &lock); |
356 | if(!prepared) { | |
357 | if((err = snd_pcm_prepare(pcm))) | |
358 | fatal(0, "error calling snd_pcm_prepare: %d", err); | |
359 | prepared = 1; | |
360 | } | |
09ee2f0d | 361 | /* Start at the first available packet */ |
362 | next_timestamp = packets->timestamp; | |
363 | active = 1; | |
ed13cbc8 | 364 | infilling = 0; |
365 | info("Playing..."); | |
0b75463f | 366 | /* Wait until the buffer empties out */ |
1153fd23 | 367 | while(nsamples >= minbuffer) { |
0b75463f | 368 | /* Wait for ALSA to ask us for more data */ |
369 | pthread_mutex_unlock(&lock); | |
370 | snd_pcm_wait(pcm, -1); | |
371 | pthread_mutex_lock(&lock); | |
09ee2f0d | 372 | /* ALSA is ready for more data */ |
0b75463f | 373 | if(packets && packets->timestamp + packets->nused == next_timestamp) { |
374 | /* Hooray, we have a packet we can play */ | |
375 | const size_t samples_available = packets->nsamples - packets->nused; | |
376 | const size_t frames_available = samples_available / 2; | |
377 | ||
378 | frames_written = snd_pcm_writei(pcm, | |
379 | packets->samples_raw + packets->nused, | |
380 | frames_available); | |
1153fd23 | 381 | if(frames_written < 0) { |
382 | if(frames_written != -EAGAIN) | |
383 | fatal(0, "error calling snd_pcm_writei: %ld", | |
384 | (long)frames_written); | |
385 | } else { | |
386 | samples_written = frames_written * 2; | |
387 | packets->nused += samples_written; | |
388 | next_timestamp += samples_written; | |
389 | if(packets->nused == packets->nsamples) { | |
390 | /* We're done with this packet */ | |
391 | struct packet *p = packets; | |
392 | ||
393 | packets = p->next; | |
394 | nsamples -= p->nsamples; | |
395 | free(p); | |
396 | pthread_cond_broadcast(&cond); | |
397 | } | |
398 | infilling = 0; | |
0b75463f | 399 | } |
400 | } else { | |
401 | /* We don't have anything to play! We'd better play some 0s. */ | |
402 | static const uint16_t zeros[1024]; | |
403 | size_t samples_available = 1024, frames_available; | |
ed13cbc8 | 404 | |
405 | if(!infilling) { | |
406 | info("Infilling..."); | |
407 | infilling = 1; | |
408 | } | |
0b75463f | 409 | if(packets && next_timestamp + samples_available > packets->timestamp) |
410 | samples_available = packets->timestamp - next_timestamp; | |
411 | frames_available = samples_available / 2; | |
412 | frames_written = snd_pcm_writei(pcm, | |
413 | zeros, | |
414 | frames_available); | |
1153fd23 | 415 | if(frames_written < 0) { |
416 | if(frames_written != -EAGAIN) | |
417 | fatal(0, "error calling snd_pcm_writei: %ld", | |
418 | (long)frames_written); | |
74a94bd0 | 419 | } else { |
420 | samples_written = frames_written * 2; | |
1153fd23 | 421 | next_timestamp += samples_written; |
74a94bd0 | 422 | } |
0b75463f | 423 | } |
424 | } | |
09ee2f0d | 425 | active = 0; |
0b75463f | 426 | /* We stop playing for a bit until the buffer re-fills */ |
427 | pthread_mutex_unlock(&lock); | |
ed13cbc8 | 428 | if((err = snd_pcm_nonblock(pcm, 0))) |
429 | fatal(0, "error calling snd_pcm_nonblock: %d", err); | |
0b75463f | 430 | if((err = snd_pcm_drain(pcm))) |
431 | fatal(0, "error calling snd_pcm_drain: %d", err); | |
ed13cbc8 | 432 | if((err = snd_pcm_nonblock(pcm, 1))) |
433 | fatal(0, "error calling snd_pcm_nonblock: %d", err); | |
0b75463f | 434 | prepared = 0; |
435 | pthread_mutex_lock(&lock); | |
436 | } | |
437 | ||
438 | } | |
e83d0967 RK |
439 | #elif HAVE_COREAUDIO_AUDIOHARDWARE_H |
440 | { | |
441 | OSStatus status; | |
442 | UInt32 propertySize; | |
443 | AudioDeviceID adid; | |
444 | AudioStreamBasicDescription asbd; | |
445 | ||
446 | /* If this looks suspiciously like libao's macosx driver there's an | |
447 | * excellent reason for that... */ | |
448 | ||
449 | /* TODO report errors as strings not numbers */ | |
450 | propertySize = sizeof adid; | |
451 | status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, | |
452 | &propertySize, &adid); | |
453 | if(status) | |
454 | fatal(0, "AudioHardwareGetProperty: %d", (int)status); | |
455 | if(adid == kAudioDeviceUnknown) | |
456 | fatal(0, "no output device"); | |
457 | propertySize = sizeof asbd; | |
458 | status = AudioDeviceGetProperty(adid, 0, false, | |
459 | kAudioDevicePropertyStreamFormat, | |
460 | &propertySize, &asbd); | |
461 | if(status) | |
462 | fatal(0, "AudioHardwareGetProperty: %d", (int)status); | |
463 | D(("mSampleRate %f", asbd.mSampleRate)); | |
464 | D(("mFormatID %08"PRIx32, asbd.mFormatID)); | |
465 | D(("mFormatFlags %08"PRIx32, asbd.mFormatFlags)); | |
466 | D(("mBytesPerPacket %08"PRIx32, asbd.mBytesPerPacket)); | |
467 | D(("mFramesPerPacket %08"PRIx32, asbd.mFramesPerPacket)); | |
468 | D(("mBytesPerFrame %08"PRIx32, asbd.mBytesPerFrame)); | |
469 | D(("mChannelsPerFrame %08"PRIx32, asbd.mChannelsPerFrame)); | |
470 | D(("mBitsPerChannel %08"PRIx32, asbd.mBitsPerChannel)); | |
471 | D(("mReserved %08"PRIx32, asbd.mReserved)); | |
472 | if(asbd.mFormatID != kAudioFormatLinearPCM) | |
473 | fatal(0, "audio device does not support kAudioFormatLinearPCM"); | |
474 | status = AudioDeviceAddIOProc(adid, adioproc, 0); | |
475 | if(status) | |
476 | fatal(0, "AudioDeviceAddIOProc: %d", (int)status); | |
477 | pthread_mutex_lock(&lock); | |
478 | for(;;) { | |
479 | /* Wait for the buffer to fill up a bit */ | |
1153fd23 | 480 | while(nsamples < readahead) |
e83d0967 RK |
481 | pthread_cond_wait(&cond, &lock); |
482 | /* Start playing now */ | |
483 | status = AudioDeviceStart(adid, adioproc); | |
484 | if(status) | |
485 | fatal(0, "AudioDeviceStart: %d", (int)status); | |
486 | /* Wait until the buffer empties out */ | |
1153fd23 | 487 | while(nsamples >= minbuffer) |
e83d0967 RK |
488 | pthread_cond_wait(&cond, &lock); |
489 | /* Stop playing for a bit until the buffer re-fills */ | |
490 | status = AudioDeviceStop(adid, adioproc); | |
491 | if(status) | |
492 | fatal(0, "AudioDeviceStop: %d", (int)status); | |
493 | /* Go back round */ | |
494 | } | |
495 | } | |
496 | #else | |
497 | # error No known audio API | |
498 | #endif | |
499 | } | |
500 | ||
501 | /* display usage message and terminate */ | |
502 | static void help(void) { | |
503 | xprintf("Usage:\n" | |
504 | " disorder-playrtp [OPTIONS] ADDRESS [PORT]\n" | |
505 | "Options:\n" | |
506 | " --help, -h Display usage message\n" | |
507 | " --version, -V Display version number\n" | |
0b75463f | 508 | " --debug, -d Turn on debugging\n" |
1153fd23 | 509 | " --device, -D DEVICE Output device\n" |
510 | " --min, -m FRAMES Buffer low water mark\n" | |
511 | " --buffer, -b FRAMES Buffer high water mark\n"); | |
e83d0967 RK |
512 | xfclose(stdout); |
513 | exit(0); | |
514 | } | |
515 | ||
516 | /* display version number and terminate */ | |
517 | static void version(void) { | |
518 | xprintf("disorder-playrtp version %s\n", disorder_version_string); | |
519 | xfclose(stdout); | |
520 | exit(0); | |
521 | } | |
522 | ||
523 | int main(int argc, char **argv) { | |
524 | int n; | |
525 | struct addrinfo *res; | |
526 | struct stringlist sl; | |
0b75463f | 527 | char *sockname; |
e83d0967 | 528 | |
0b75463f | 529 | static const struct addrinfo prefs = { |
e83d0967 RK |
530 | AI_PASSIVE, |
531 | PF_INET, | |
532 | SOCK_DGRAM, | |
533 | IPPROTO_UDP, | |
534 | 0, | |
535 | 0, | |
536 | 0, | |
537 | 0 | |
538 | }; | |
539 | ||
540 | mem_init(); | |
541 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
1153fd23 | 542 | while((n = getopt_long(argc, argv, "hVdD:m:b:", options, 0)) >= 0) { |
e83d0967 RK |
543 | switch(n) { |
544 | case 'h': help(); | |
545 | case 'V': version(); | |
546 | case 'd': debugging = 1; break; | |
0b75463f | 547 | case 'D': device = optarg; break; |
1153fd23 | 548 | case 'm': minbuffer = 2 * atol(optarg); break; |
549 | case 'b': readahead = 2 * atol(optarg); break; | |
e83d0967 RK |
550 | default: fatal(0, "invalid option"); |
551 | } | |
552 | } | |
553 | argc -= optind; | |
554 | argv += optind; | |
555 | if(argc < 1 || argc > 2) | |
556 | fatal(0, "usage: disorder-playrtp [OPTIONS] ADDRESS [PORT]"); | |
557 | sl.n = argc; | |
558 | sl.s = argv; | |
559 | /* Listen for inbound audio data */ | |
0b75463f | 560 | if(!(res = get_address(&sl, &prefs, &sockname))) |
e83d0967 RK |
561 | exit(1); |
562 | if((rtpfd = socket(res->ai_family, | |
563 | res->ai_socktype, | |
564 | res->ai_protocol)) < 0) | |
565 | fatal(errno, "error creating socket"); | |
566 | if(bind(rtpfd, res->ai_addr, res->ai_addrlen) < 0) | |
567 | fatal(errno, "error binding socket to %s", sockname); | |
568 | play_rtp(); | |
569 | return 0; | |
570 | } | |
571 | ||
572 | /* | |
573 | Local Variables: | |
574 | c-basic-offset:2 | |
575 | comment-column:40 | |
576 | fill-column:79 | |
577 | indent-tabs-mode:nil | |
578 | End: | |
579 | */ |