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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 | */ | |
28bacdc0 RK |
20 | /** @file clients/playrtp.c |
21 | * @brief RTP player | |
22 | * | |
23 | * This RTP player supports Linux (ALSA) and Darwin (Core Audio) systems. | |
24 | */ | |
e83d0967 RK |
25 | |
26 | #include <config.h> | |
27 | #include "types.h" | |
28 | ||
29 | #include <getopt.h> | |
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/socket.h> | |
35 | #include <netdb.h> | |
36 | #include <pthread.h> | |
0b75463f | 37 | #include <locale.h> |
2c7c9eae | 38 | #include <sys/uio.h> |
28bacdc0 | 39 | #include <string.h> |
e83d0967 RK |
40 | |
41 | #include "log.h" | |
42 | #include "mem.h" | |
43 | #include "configuration.h" | |
44 | #include "addr.h" | |
45 | #include "syscalls.h" | |
46 | #include "rtp.h" | |
0b75463f | 47 | #include "defs.h" |
28bacdc0 RK |
48 | #include "vector.h" |
49 | #include "heap.h" | |
e83d0967 RK |
50 | |
51 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H | |
52 | # include <CoreAudio/AudioHardware.h> | |
53 | #endif | |
0b75463f | 54 | #if API_ALSA |
55 | #include <alsa/asoundlib.h> | |
56 | #endif | |
e83d0967 | 57 | |
1153fd23 | 58 | #define readahead linux_headers_are_borked |
59 | ||
0b75463f | 60 | /** @brief RTP socket */ |
e83d0967 RK |
61 | static int rtpfd; |
62 | ||
345ebe66 RK |
63 | /** @brief Log output */ |
64 | static FILE *logfp; | |
65 | ||
0b75463f | 66 | /** @brief Output device */ |
67 | static const char *device; | |
68 | ||
69 | /** @brief Maximum samples per packet we'll support | |
70 | * | |
71 | * NB that two channels = two samples in this program. | |
72 | */ | |
73 | #define MAXSAMPLES 2048 | |
74 | ||
9086a105 | 75 | /** @brief Minimum low watermark |
0b75463f | 76 | * |
77 | * We'll stop playing if there's only this many samples in the buffer. */ | |
1153fd23 | 78 | static unsigned minbuffer = 2 * 44100 / 10; /* 0.2 seconds */ |
0b75463f | 79 | |
80 | /** @brief Maximum sample size | |
81 | * | |
82 | * The maximum supported size (in bytes) of one sample. */ | |
83 | #define MAXSAMPLESIZE 2 | |
84 | ||
9086a105 | 85 | /** @brief Buffer high watermark |
1153fd23 | 86 | * |
87 | * We'll only start playing when this many samples are available. */ | |
8d0c14d7 | 88 | static unsigned readahead = 2 * 2 * 44100; |
0b75463f | 89 | |
9086a105 RK |
90 | /** @brief Maximum buffer size |
91 | * | |
92 | * We'll stop reading from the network if we have this many samples. */ | |
93 | static unsigned maxbuffer; | |
94 | ||
28bacdc0 RK |
95 | /** @brief Number of samples to infill by in one go |
96 | * | |
97 | * This is an upper bound - in practice we expxect the underlying audio API to | |
98 | * only ask for a much smaller number of samples in any one go. | |
99 | */ | |
c0e41690 | 100 | #define INFILL_SAMPLES (44100 * 2) /* 1s */ |
101 | ||
28bacdc0 RK |
102 | /** @brief Received packet |
103 | * | |
104 | * Received packets are kept in a binary heap (see @ref pheap) ordered by | |
105 | * timestamp. | |
106 | */ | |
0b75463f | 107 | struct packet { |
0b75463f | 108 | /** @brief Number of samples in this packet */ |
c0e41690 | 109 | uint32_t nsamples; |
0b75463f | 110 | /** @brief Timestamp from RTP packet |
111 | * | |
28bacdc0 RK |
112 | * NB that "timestamps" are really sample counters. Use lt() or lt_packet() |
113 | * to compare timestamps. | |
114 | */ | |
0b75463f | 115 | uint32_t timestamp; |
28bacdc0 RK |
116 | /** @brief Raw sample data |
117 | * | |
118 | * Only the first @p nsamples samples are defined; the rest is uninitialized | |
119 | * data. | |
120 | */ | |
0b75463f | 121 | unsigned char samples_raw[MAXSAMPLES * MAXSAMPLESIZE]; |
e83d0967 RK |
122 | }; |
123 | ||
28bacdc0 | 124 | /** @brief Return true iff \f$a < b\f$ in sequence-space arithmetic |
0b75463f | 125 | * |
28bacdc0 RK |
126 | * Specifically it returns true if \f$(a-b) mod 2^{32} < 2^{31}\f$. |
127 | * | |
128 | * See also lt_packet(). | |
129 | */ | |
130 | static inline int lt(uint32_t a, uint32_t b) { | |
131 | return (uint32_t)(a - b) & 0x80000000; | |
132 | } | |
2c7c9eae | 133 | |
28bacdc0 RK |
134 | /** @brief Return true iff a >= b in sequence-space arithmetic */ |
135 | static inline int ge(uint32_t a, uint32_t b) { | |
136 | return !lt(a, b); | |
137 | } | |
138 | ||
139 | /** @brief Return true iff a > b in sequence-space arithmetic */ | |
140 | static inline int gt(uint32_t a, uint32_t b) { | |
141 | return lt(b, a); | |
142 | } | |
143 | ||
144 | /** @brief Return true iff a <= b in sequence-space arithmetic */ | |
145 | static inline int le(uint32_t a, uint32_t b) { | |
146 | return !lt(b, a); | |
147 | } | |
148 | ||
149 | /** @brief Ordering for packets, used by @ref pheap */ | |
150 | static inline int lt_packet(const struct packet *a, const struct packet *b) { | |
151 | return lt(a->timestamp, b->timestamp); | |
152 | } | |
153 | ||
154 | /** @struct pheap | |
155 | * @brief Binary heap of packets ordered by timestamp */ | |
156 | HEAP_TYPE(pheap, struct packet *, lt_packet); | |
157 | ||
158 | /** @brief Binary heap of received packets */ | |
159 | static struct pheap packets; | |
160 | ||
161 | /** @brief Total number of samples available */ | |
162 | static unsigned long nsamples; | |
0b75463f | 163 | |
164 | /** @brief Timestamp of next packet to play. | |
165 | * | |
166 | * This is set to the timestamp of the last packet, plus the number of | |
09ee2f0d | 167 | * samples it contained. Only valid if @ref active is nonzero. |
0b75463f | 168 | */ |
169 | static uint32_t next_timestamp; | |
e83d0967 | 170 | |
09ee2f0d | 171 | /** @brief True if actively playing |
172 | * | |
173 | * This is true when playing and false when just buffering. */ | |
174 | static int active; | |
175 | ||
2c7c9eae RK |
176 | /** @brief Structure of free packet list */ |
177 | union free_packet { | |
178 | struct packet p; | |
179 | union free_packet *next; | |
180 | }; | |
181 | ||
28bacdc0 RK |
182 | /** @brief Linked list of free packets |
183 | * | |
184 | * This is a linked list of formerly used packets. For preference we re-use | |
185 | * packets that have already been used rather than unused ones, to limit the | |
186 | * size of the program's working set. If there are no free packets in the list | |
187 | * we try @ref next_free_packet instead. | |
188 | * | |
189 | * Must hold @ref lock when accessing this. | |
190 | */ | |
2c7c9eae RK |
191 | static union free_packet *free_packets; |
192 | ||
28bacdc0 RK |
193 | /** @brief Array of new free packets |
194 | * | |
195 | * There are @ref count_free_packets ready to use at this address. If there | |
196 | * are none left we allocate more memory. | |
197 | * | |
198 | * Must hold @ref lock when accessing this. | |
199 | */ | |
2c7c9eae RK |
200 | static union free_packet *next_free_packet; |
201 | ||
28bacdc0 RK |
202 | /** @brief Count of new free packets at @ref next_free_packet |
203 | * | |
204 | * Must hold @ref lock when accessing this. | |
205 | */ | |
2c7c9eae RK |
206 | static size_t count_free_packets; |
207 | ||
28bacdc0 RK |
208 | /** @brief Lock protecting @ref packets |
209 | * | |
210 | * This also protects the packet memory allocation infrastructure, @ref | |
211 | * free_packets and @ref next_free_packet. */ | |
e83d0967 | 212 | static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
e83d0967 | 213 | |
0b75463f | 214 | /** @brief Condition variable signalled whenever @ref packets is changed */ |
215 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; | |
e83d0967 RK |
216 | |
217 | static const struct option options[] = { | |
218 | { "help", no_argument, 0, 'h' }, | |
219 | { "version", no_argument, 0, 'V' }, | |
220 | { "debug", no_argument, 0, 'd' }, | |
0b75463f | 221 | { "device", required_argument, 0, 'D' }, |
1153fd23 | 222 | { "min", required_argument, 0, 'm' }, |
9086a105 | 223 | { "max", required_argument, 0, 'x' }, |
1153fd23 | 224 | { "buffer", required_argument, 0, 'b' }, |
e83d0967 RK |
225 | { 0, 0, 0, 0 } |
226 | }; | |
227 | ||
2c7c9eae RK |
228 | /** @brief Return a new packet |
229 | * | |
230 | * Assumes that @ref lock is held. */ | |
231 | static struct packet *new_packet(void) { | |
232 | struct packet *p; | |
233 | ||
234 | if(free_packets) { | |
235 | p = &free_packets->p; | |
236 | free_packets = free_packets->next; | |
237 | } else { | |
238 | if(!count_free_packets) { | |
239 | next_free_packet = xcalloc(1024, sizeof (union free_packet)); | |
240 | count_free_packets = 1024; | |
241 | } | |
242 | p = &(next_free_packet++)->p; | |
243 | --count_free_packets; | |
244 | } | |
245 | return p; | |
246 | } | |
247 | ||
248 | /** @brief Free a packet | |
249 | * | |
250 | * Assumes that @ref lock is held. */ | |
251 | static void free_packet(struct packet *p) { | |
252 | union free_packet *u = (union free_packet *)p; | |
253 | u->next = free_packets; | |
254 | free_packets = u; | |
255 | } | |
256 | ||
28bacdc0 RK |
257 | /** @brief Drop the first packet |
258 | * | |
259 | * Assumes that @ref lock is held. | |
260 | */ | |
261 | static void drop_first_packet(void) { | |
262 | if(pheap_count(&packets)) { | |
263 | struct packet *const p = pheap_remove(&packets); | |
264 | nsamples -= p->nsamples; | |
265 | free_packet(p); | |
2c7c9eae | 266 | pthread_cond_broadcast(&cond); |
2c7c9eae | 267 | } |
9086a105 RK |
268 | } |
269 | ||
09ee2f0d | 270 | /** @brief Background thread collecting samples |
0b75463f | 271 | * |
272 | * This function collects samples, perhaps converts them to the target format, | |
273 | * and adds them to the packet list. */ | |
274 | static void *listen_thread(void attribute((unused)) *arg) { | |
2c7c9eae | 275 | struct packet *p = 0; |
0b75463f | 276 | int n; |
2c7c9eae RK |
277 | struct rtp_header header; |
278 | uint16_t seq; | |
279 | uint32_t timestamp; | |
280 | struct iovec iov[2]; | |
e83d0967 RK |
281 | |
282 | for(;;) { | |
2c7c9eae RK |
283 | if(!p) { |
284 | pthread_mutex_lock(&lock); | |
285 | p = new_packet(); | |
286 | pthread_mutex_unlock(&lock); | |
287 | } | |
288 | iov[0].iov_base = &header; | |
289 | iov[0].iov_len = sizeof header; | |
290 | iov[1].iov_base = p->samples_raw; | |
291 | iov[1].iov_len = sizeof p->samples_raw; | |
292 | n = readv(rtpfd, iov, 2); | |
e83d0967 RK |
293 | if(n < 0) { |
294 | switch(errno) { | |
295 | case EINTR: | |
296 | continue; | |
297 | default: | |
298 | fatal(errno, "error reading from socket"); | |
299 | } | |
300 | } | |
0b75463f | 301 | /* Ignore too-short packets */ |
345ebe66 RK |
302 | if((size_t)n <= sizeof (struct rtp_header)) { |
303 | info("ignored a short packet"); | |
0b75463f | 304 | continue; |
345ebe66 | 305 | } |
2c7c9eae RK |
306 | timestamp = htonl(header.timestamp); |
307 | seq = htons(header.seq); | |
09ee2f0d | 308 | /* Ignore packets in the past */ |
2c7c9eae | 309 | if(active && lt(timestamp, next_timestamp)) { |
c0e41690 | 310 | info("dropping old packet, timestamp=%"PRIx32" < %"PRIx32, |
2c7c9eae | 311 | timestamp, next_timestamp); |
09ee2f0d | 312 | continue; |
c0e41690 | 313 | } |
2c7c9eae RK |
314 | pthread_mutex_lock(&lock); |
315 | p = new_packet(); | |
316 | p->timestamp = timestamp; | |
e83d0967 | 317 | /* Convert to target format */ |
2c7c9eae | 318 | switch(header.mpt & 0x7F) { |
e83d0967 | 319 | case 10: |
2c7c9eae | 320 | p->nsamples = (n - sizeof header) / sizeof(uint16_t); |
0b75463f | 321 | /* ALSA can do any necessary conversion itself (though it might be better |
322 | * to do any necessary conversion in the background) */ | |
2c7c9eae | 323 | /* TODO we could readv into the buffer */ |
e83d0967 RK |
324 | break; |
325 | /* TODO support other RFC3551 media types (when the speaker does) */ | |
326 | default: | |
0b75463f | 327 | fatal(0, "unsupported RTP payload type %d", |
2c7c9eae | 328 | header.mpt & 0x7F); |
e83d0967 | 329 | } |
345ebe66 RK |
330 | if(logfp) |
331 | fprintf(logfp, "sequence %u timestamp %"PRIx32" length %"PRIx32" end %"PRIx32"\n", | |
2c7c9eae | 332 | seq, timestamp, p->nsamples, timestamp + p->nsamples); |
0b75463f | 333 | /* Stop reading if we've reached the maximum. |
334 | * | |
335 | * This is rather unsatisfactory: it means that if packets get heavily | |
336 | * out of order then we guarantee dropouts. But for now... */ | |
345ebe66 RK |
337 | if(nsamples >= maxbuffer) { |
338 | info("buffer full"); | |
339 | while(nsamples >= maxbuffer) | |
340 | pthread_cond_wait(&cond, &lock); | |
341 | } | |
28bacdc0 RK |
342 | /* Add the packet to the heap */ |
343 | pheap_insert(&packets, p); | |
2c7c9eae RK |
344 | nsamples += p->nsamples; |
345 | pthread_cond_broadcast(&cond); | |
e83d0967 | 346 | pthread_mutex_unlock(&lock); |
e83d0967 RK |
347 | } |
348 | } | |
349 | ||
2c7c9eae RK |
350 | /** @brief Return true if @p p contains @p timestamp */ |
351 | static inline int contains(const struct packet *p, uint32_t timestamp) { | |
352 | const uint32_t packet_start = p->timestamp; | |
353 | const uint32_t packet_end = p->timestamp + p->nsamples; | |
354 | ||
355 | return (ge(timestamp, packet_start) | |
356 | && lt(timestamp, packet_end)); | |
357 | } | |
358 | ||
e83d0967 | 359 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H |
09ee2f0d | 360 | /** @brief Callback from Core Audio */ |
9086a105 RK |
361 | static OSStatus adioproc |
362 | (AudioDeviceID attribute((unused)) inDevice, | |
363 | const AudioTimeStamp attribute((unused)) *inNow, | |
364 | const AudioBufferList attribute((unused)) *inInputData, | |
365 | const AudioTimeStamp attribute((unused)) *inInputTime, | |
366 | AudioBufferList *outOutputData, | |
367 | const AudioTimeStamp attribute((unused)) *inOutputTime, | |
368 | void attribute((unused)) *inClientData) { | |
e83d0967 RK |
369 | UInt32 nbuffers = outOutputData->mNumberBuffers; |
370 | AudioBuffer *ab = outOutputData->mBuffers; | |
2c7c9eae | 371 | const struct packet *p; |
28bacdc0 | 372 | uint32_t samples_available; |
e83d0967 | 373 | |
0b75463f | 374 | pthread_mutex_lock(&lock); |
9086a105 RK |
375 | while(nbuffers > 0) { |
376 | float *samplesOut = ab->mData; | |
377 | size_t samplesOutLeft = ab->mDataByteSize / sizeof (float); | |
2c7c9eae | 378 | |
9086a105 | 379 | while(samplesOutLeft > 0) { |
2c7c9eae RK |
380 | /* Look for a suitable packet, dropping any unsuitable ones along the |
381 | * way. Unsuitable packets are ones that are in the past. */ | |
28bacdc0 RK |
382 | while(pheap_count(&packets)) { |
383 | p = pheap_first(&packets); | |
384 | if(le(p->timestamp + p->nsamples, next_timestamp)) | |
385 | /* This packet is in the past. Drop it and try another one. */ | |
386 | drop_first_packet(); | |
387 | else | |
388 | /* This packet is NOT in the past. (It might be in the future | |
389 | * however.) */ | |
390 | break; | |
9086a105 | 391 | } |
28bacdc0 RK |
392 | p = pheap_count(&packets) ? pheap_first(&packets) : 0; |
393 | if(p && contains(p, next_timestamp)) { | |
394 | /* This packet is ready to play */ | |
395 | const uint32_t packet_end = p->timestamp + p->nsamples; | |
396 | const uint32_t offset = next_timestamp - p->timestamp; | |
397 | const uint16_t *ptr = | |
398 | (void *)(p->samples_raw + offset * sizeof (uint16_t)); | |
399 | ||
400 | samples_available = packet_end - next_timestamp; | |
401 | if(samples_available > samplesOutLeft) | |
402 | samples_available = samplesOutLeft; | |
403 | next_timestamp += samples_available; | |
404 | samplesOutLeft -= samples_available; | |
405 | while(samples_available-- > 0) | |
406 | *samplesOut++ = (int16_t)ntohs(*ptr++) * (0.5 / 32767); | |
407 | /* We don't bother junking the packet - that'll be dealt with next time | |
408 | * round */ | |
409 | } else { | |
410 | /* No packet is ready to play (and there might be no packet at all) */ | |
411 | samples_available = p ? p->timestamp - next_timestamp | |
412 | : samplesOutLeft; | |
9086a105 RK |
413 | if(samples_available > samplesOutLeft) |
414 | samples_available = samplesOutLeft; | |
8dcb5ff0 | 415 | info("infill by %"PRIu32, samples_available); |
28bacdc0 | 416 | /* Conveniently the buffer is 0 to start with */ |
9086a105 RK |
417 | next_timestamp += samples_available; |
418 | samplesOut += samples_available; | |
419 | samplesOutLeft -= samples_available; | |
9086a105 | 420 | } |
e83d0967 | 421 | } |
9086a105 RK |
422 | ++ab; |
423 | --nbuffers; | |
e83d0967 RK |
424 | } |
425 | pthread_mutex_unlock(&lock); | |
426 | return 0; | |
427 | } | |
428 | #endif | |
429 | ||
09ee2f0d | 430 | /** @brief Play an RTP stream |
431 | * | |
432 | * This is the guts of the program. It is responsible for: | |
433 | * - starting the listening thread | |
434 | * - opening the audio device | |
435 | * - reading ahead to build up a buffer | |
436 | * - arranging for audio to be played | |
437 | * - detecting when the buffer has got too small and re-buffering | |
438 | */ | |
0b75463f | 439 | static void play_rtp(void) { |
440 | pthread_t ltid; | |
e83d0967 RK |
441 | |
442 | /* We receive and convert audio data in a background thread */ | |
0b75463f | 443 | pthread_create(<id, 0, listen_thread, 0); |
e83d0967 | 444 | #if API_ALSA |
0b75463f | 445 | { |
446 | snd_pcm_t *pcm; | |
447 | snd_pcm_hw_params_t *hwparams; | |
448 | snd_pcm_sw_params_t *swparams; | |
449 | /* Only support one format for now */ | |
450 | const int sample_format = SND_PCM_FORMAT_S16_BE; | |
451 | unsigned rate = 44100; | |
452 | const int channels = 2; | |
453 | const int samplesize = channels * sizeof(uint16_t); | |
454 | snd_pcm_uframes_t pcm_bufsize = MAXSAMPLES * samplesize * 3; | |
455 | /* If we can write more than this many samples we'll get a wakeup */ | |
456 | const int avail_min = 256; | |
457 | snd_pcm_sframes_t frames_written; | |
458 | size_t samples_written; | |
459 | int prepared = 1; | |
460 | int err; | |
c0e41690 | 461 | int infilling = 0, escape = 0; |
462 | time_t logged, now; | |
463 | uint32_t packet_start, packet_end; | |
0b75463f | 464 | |
465 | /* Open ALSA */ | |
466 | if((err = snd_pcm_open(&pcm, | |
467 | device ? device : "default", | |
468 | SND_PCM_STREAM_PLAYBACK, | |
469 | SND_PCM_NONBLOCK))) | |
470 | fatal(0, "error from snd_pcm_open: %d", err); | |
471 | /* Set up 'hardware' parameters */ | |
472 | snd_pcm_hw_params_alloca(&hwparams); | |
473 | if((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0) | |
474 | fatal(0, "error from snd_pcm_hw_params_any: %d", err); | |
475 | if((err = snd_pcm_hw_params_set_access(pcm, hwparams, | |
476 | SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) | |
477 | fatal(0, "error from snd_pcm_hw_params_set_access: %d", err); | |
478 | if((err = snd_pcm_hw_params_set_format(pcm, hwparams, | |
479 | sample_format)) < 0) | |
480 | fatal(0, "error from snd_pcm_hw_params_set_format (%d): %d", | |
481 | sample_format, err); | |
482 | if((err = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rate, 0)) < 0) | |
483 | fatal(0, "error from snd_pcm_hw_params_set_rate (%d): %d", | |
484 | rate, err); | |
485 | if((err = snd_pcm_hw_params_set_channels(pcm, hwparams, | |
486 | channels)) < 0) | |
487 | fatal(0, "error from snd_pcm_hw_params_set_channels (%d): %d", | |
488 | channels, err); | |
489 | if((err = snd_pcm_hw_params_set_buffer_size_near(pcm, hwparams, | |
490 | &pcm_bufsize)) < 0) | |
491 | fatal(0, "error from snd_pcm_hw_params_set_buffer_size (%d): %d", | |
492 | MAXSAMPLES * samplesize * 3, err); | |
493 | if((err = snd_pcm_hw_params(pcm, hwparams)) < 0) | |
494 | fatal(0, "error calling snd_pcm_hw_params: %d", err); | |
495 | /* Set up 'software' parameters */ | |
496 | snd_pcm_sw_params_alloca(&swparams); | |
497 | if((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) | |
498 | fatal(0, "error calling snd_pcm_sw_params_current: %d", err); | |
499 | if((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) | |
500 | fatal(0, "error calling snd_pcm_sw_params_set_avail_min %d: %d", | |
501 | avail_min, err); | |
502 | if((err = snd_pcm_sw_params(pcm, swparams)) < 0) | |
503 | fatal(0, "error calling snd_pcm_sw_params: %d", err); | |
504 | ||
505 | /* Ready to go */ | |
506 | ||
c0e41690 | 507 | time(&logged); |
0b75463f | 508 | pthread_mutex_lock(&lock); |
509 | for(;;) { | |
510 | /* Wait for the buffer to fill up a bit */ | |
8d0c14d7 | 511 | logged = now; |
512 | info("%lu samples in buffer (%lus)", nsamples, | |
513 | nsamples / (44100 * 2)); | |
ed13cbc8 | 514 | info("Buffering..."); |
1153fd23 | 515 | while(nsamples < readahead) |
0b75463f | 516 | pthread_cond_wait(&cond, &lock); |
517 | if(!prepared) { | |
518 | if((err = snd_pcm_prepare(pcm))) | |
519 | fatal(0, "error calling snd_pcm_prepare: %d", err); | |
520 | prepared = 1; | |
521 | } | |
09ee2f0d | 522 | active = 1; |
ed13cbc8 | 523 | infilling = 0; |
c0e41690 | 524 | escape = 0; |
8d0c14d7 | 525 | logged = now; |
526 | info("%lu samples in buffer (%lus)", nsamples, | |
527 | nsamples / (44100 * 2)); | |
ed13cbc8 | 528 | info("Playing..."); |
0b75463f | 529 | /* Wait until the buffer empties out */ |
c0e41690 | 530 | while(nsamples >= minbuffer && !escape) { |
531 | time(&now); | |
532 | if(now > logged + 10) { | |
533 | logged = now; | |
534 | info("%lu samples in buffer (%lus)", nsamples, | |
535 | nsamples / (44100 * 2)); | |
536 | } | |
537 | if(packets | |
538 | && ge(next_timestamp, packets->timestamp + packets->nsamples)) { | |
c0e41690 | 539 | info("dropping buffered past packet %"PRIx32" < %"PRIx32, |
540 | packets->timestamp, next_timestamp); | |
9086a105 | 541 | drop_first_packet(); |
c0e41690 | 542 | continue; |
543 | } | |
0b75463f | 544 | /* Wait for ALSA to ask us for more data */ |
545 | pthread_mutex_unlock(&lock); | |
9ae1516d | 546 | write(2, ".", 1); /* TODO remove me sometime */ |
547 | switch(err = snd_pcm_wait(pcm, -1)) { | |
548 | case 0: | |
549 | info("snd_pcm_wait timed out"); | |
550 | break; | |
551 | case 1: | |
552 | break; | |
553 | default: | |
554 | fatal(0, "snd_pcm_wait returned %d", err); | |
555 | } | |
0b75463f | 556 | pthread_mutex_lock(&lock); |
09ee2f0d | 557 | /* ALSA is ready for more data */ |
c0e41690 | 558 | packet_start = packets->timestamp; |
559 | packet_end = packets->timestamp + packets->nsamples; | |
560 | if(ge(next_timestamp, packet_start) | |
561 | && lt(next_timestamp, packet_end)) { | |
562 | /* The target timestamp is somewhere in this packet */ | |
563 | const uint32_t offset = next_timestamp - packets->timestamp; | |
564 | const uint32_t samples_available = (packets->timestamp + packets->nsamples) - next_timestamp; | |
0b75463f | 565 | const size_t frames_available = samples_available / 2; |
566 | ||
567 | frames_written = snd_pcm_writei(pcm, | |
c0e41690 | 568 | packets->samples_raw + offset, |
0b75463f | 569 | frames_available); |
1153fd23 | 570 | if(frames_written < 0) { |
c0e41690 | 571 | switch(frames_written) { |
572 | case -EAGAIN: | |
573 | info("snd_pcm_wait() returned but we got -EAGAIN!"); | |
574 | break; | |
575 | case -EPIPE: | |
576 | error(0, "error calling snd_pcm_writei: %ld", | |
577 | (long)frames_written); | |
578 | escape = 1; | |
579 | break; | |
580 | default: | |
1153fd23 | 581 | fatal(0, "error calling snd_pcm_writei: %ld", |
582 | (long)frames_written); | |
c0e41690 | 583 | } |
1153fd23 | 584 | } else { |
585 | samples_written = frames_written * 2; | |
1153fd23 | 586 | next_timestamp += samples_written; |
9086a105 RK |
587 | if(ge(next_timestamp, packet_end)) |
588 | drop_first_packet(); | |
1153fd23 | 589 | infilling = 0; |
0b75463f | 590 | } |
591 | } else { | |
592 | /* We don't have anything to play! We'd better play some 0s. */ | |
c0e41690 | 593 | static const uint16_t zeros[INFILL_SAMPLES]; |
594 | size_t samples_available = INFILL_SAMPLES, frames_available; | |
ed13cbc8 | 595 | |
c0e41690 | 596 | /* If the maximum infill would take us past the start of the next |
597 | * packet then we truncate the infill to the right amount. */ | |
598 | if(lt(packets->timestamp, | |
599 | next_timestamp + samples_available)) | |
0b75463f | 600 | samples_available = packets->timestamp - next_timestamp; |
c0e41690 | 601 | if((int)samples_available < 0) { |
602 | info("packets->timestamp: %"PRIx32" next_timestamp: %"PRIx32" next+max: %"PRIx32" available: %"PRIx32, | |
603 | packets->timestamp, next_timestamp, | |
604 | next_timestamp + INFILL_SAMPLES, samples_available); | |
605 | } | |
0b75463f | 606 | frames_available = samples_available / 2; |
c0e41690 | 607 | if(!infilling) { |
8d0c14d7 | 608 | info("Infilling %d samples, next=%"PRIx32" packet=[%"PRIx32",%"PRIx32"]", |
609 | samples_available, next_timestamp, | |
610 | packets->timestamp, packets->timestamp + packets->nsamples); | |
c0e41690 | 611 | //infilling++; |
612 | } | |
0b75463f | 613 | frames_written = snd_pcm_writei(pcm, |
614 | zeros, | |
615 | frames_available); | |
1153fd23 | 616 | if(frames_written < 0) { |
c0e41690 | 617 | switch(frames_written) { |
618 | case -EAGAIN: | |
619 | info("snd_pcm_wait() returned but we got -EAGAIN!"); | |
620 | break; | |
621 | case -EPIPE: | |
622 | error(0, "error calling snd_pcm_writei: %ld", | |
623 | (long)frames_written); | |
624 | escape = 1; | |
625 | break; | |
626 | default: | |
1153fd23 | 627 | fatal(0, "error calling snd_pcm_writei: %ld", |
628 | (long)frames_written); | |
c0e41690 | 629 | } |
74a94bd0 | 630 | } else { |
631 | samples_written = frames_written * 2; | |
1153fd23 | 632 | next_timestamp += samples_written; |
74a94bd0 | 633 | } |
0b75463f | 634 | } |
635 | } | |
09ee2f0d | 636 | active = 0; |
0b75463f | 637 | /* We stop playing for a bit until the buffer re-fills */ |
638 | pthread_mutex_unlock(&lock); | |
ed13cbc8 | 639 | if((err = snd_pcm_nonblock(pcm, 0))) |
640 | fatal(0, "error calling snd_pcm_nonblock: %d", err); | |
c0e41690 | 641 | if(escape) { |
642 | if((err = snd_pcm_drop(pcm))) | |
643 | fatal(0, "error calling snd_pcm_drop: %d", err); | |
644 | escape = 0; | |
645 | } else | |
646 | if((err = snd_pcm_drain(pcm))) | |
647 | fatal(0, "error calling snd_pcm_drain: %d", err); | |
ed13cbc8 | 648 | if((err = snd_pcm_nonblock(pcm, 1))) |
649 | fatal(0, "error calling snd_pcm_nonblock: %d", err); | |
0b75463f | 650 | prepared = 0; |
651 | pthread_mutex_lock(&lock); | |
652 | } | |
653 | ||
654 | } | |
e83d0967 RK |
655 | #elif HAVE_COREAUDIO_AUDIOHARDWARE_H |
656 | { | |
657 | OSStatus status; | |
658 | UInt32 propertySize; | |
659 | AudioDeviceID adid; | |
660 | AudioStreamBasicDescription asbd; | |
661 | ||
662 | /* If this looks suspiciously like libao's macosx driver there's an | |
663 | * excellent reason for that... */ | |
664 | ||
665 | /* TODO report errors as strings not numbers */ | |
666 | propertySize = sizeof adid; | |
667 | status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, | |
668 | &propertySize, &adid); | |
669 | if(status) | |
670 | fatal(0, "AudioHardwareGetProperty: %d", (int)status); | |
671 | if(adid == kAudioDeviceUnknown) | |
672 | fatal(0, "no output device"); | |
673 | propertySize = sizeof asbd; | |
674 | status = AudioDeviceGetProperty(adid, 0, false, | |
675 | kAudioDevicePropertyStreamFormat, | |
676 | &propertySize, &asbd); | |
677 | if(status) | |
678 | fatal(0, "AudioHardwareGetProperty: %d", (int)status); | |
679 | D(("mSampleRate %f", asbd.mSampleRate)); | |
9086a105 RK |
680 | D(("mFormatID %08lx", asbd.mFormatID)); |
681 | D(("mFormatFlags %08lx", asbd.mFormatFlags)); | |
682 | D(("mBytesPerPacket %08lx", asbd.mBytesPerPacket)); | |
683 | D(("mFramesPerPacket %08lx", asbd.mFramesPerPacket)); | |
684 | D(("mBytesPerFrame %08lx", asbd.mBytesPerFrame)); | |
685 | D(("mChannelsPerFrame %08lx", asbd.mChannelsPerFrame)); | |
686 | D(("mBitsPerChannel %08lx", asbd.mBitsPerChannel)); | |
687 | D(("mReserved %08lx", asbd.mReserved)); | |
e83d0967 RK |
688 | if(asbd.mFormatID != kAudioFormatLinearPCM) |
689 | fatal(0, "audio device does not support kAudioFormatLinearPCM"); | |
690 | status = AudioDeviceAddIOProc(adid, adioproc, 0); | |
691 | if(status) | |
692 | fatal(0, "AudioDeviceAddIOProc: %d", (int)status); | |
693 | pthread_mutex_lock(&lock); | |
694 | for(;;) { | |
695 | /* Wait for the buffer to fill up a bit */ | |
8dcb5ff0 | 696 | info("Buffering..."); |
1153fd23 | 697 | while(nsamples < readahead) |
e83d0967 RK |
698 | pthread_cond_wait(&cond, &lock); |
699 | /* Start playing now */ | |
8dcb5ff0 | 700 | info("Playing..."); |
28bacdc0 | 701 | next_timestamp = pheap_first(&packets)->timestamp; |
8dcb5ff0 | 702 | active = 1; |
e83d0967 RK |
703 | status = AudioDeviceStart(adid, adioproc); |
704 | if(status) | |
705 | fatal(0, "AudioDeviceStart: %d", (int)status); | |
706 | /* Wait until the buffer empties out */ | |
1153fd23 | 707 | while(nsamples >= minbuffer) |
e83d0967 RK |
708 | pthread_cond_wait(&cond, &lock); |
709 | /* Stop playing for a bit until the buffer re-fills */ | |
710 | status = AudioDeviceStop(adid, adioproc); | |
711 | if(status) | |
712 | fatal(0, "AudioDeviceStop: %d", (int)status); | |
8dcb5ff0 | 713 | active = 0; |
e83d0967 RK |
714 | /* Go back round */ |
715 | } | |
716 | } | |
717 | #else | |
718 | # error No known audio API | |
719 | #endif | |
720 | } | |
721 | ||
722 | /* display usage message and terminate */ | |
723 | static void help(void) { | |
724 | xprintf("Usage:\n" | |
725 | " disorder-playrtp [OPTIONS] ADDRESS [PORT]\n" | |
726 | "Options:\n" | |
1153fd23 | 727 | " --device, -D DEVICE Output device\n" |
728 | " --min, -m FRAMES Buffer low water mark\n" | |
9086a105 RK |
729 | " --buffer, -b FRAMES Buffer high water mark\n" |
730 | " --max, -x FRAMES Buffer maximum size\n" | |
731 | " --help, -h Display usage message\n" | |
732 | " --version, -V Display version number\n" | |
733 | ); | |
e83d0967 RK |
734 | xfclose(stdout); |
735 | exit(0); | |
736 | } | |
737 | ||
738 | /* display version number and terminate */ | |
739 | static void version(void) { | |
740 | xprintf("disorder-playrtp version %s\n", disorder_version_string); | |
741 | xfclose(stdout); | |
742 | exit(0); | |
743 | } | |
744 | ||
745 | int main(int argc, char **argv) { | |
746 | int n; | |
747 | struct addrinfo *res; | |
748 | struct stringlist sl; | |
0b75463f | 749 | char *sockname; |
e83d0967 | 750 | |
0b75463f | 751 | static const struct addrinfo prefs = { |
e83d0967 RK |
752 | AI_PASSIVE, |
753 | PF_INET, | |
754 | SOCK_DGRAM, | |
755 | IPPROTO_UDP, | |
756 | 0, | |
757 | 0, | |
758 | 0, | |
759 | 0 | |
760 | }; | |
761 | ||
762 | mem_init(); | |
763 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
345ebe66 | 764 | while((n = getopt_long(argc, argv, "hVdD:m:b:x:L:", options, 0)) >= 0) { |
e83d0967 RK |
765 | switch(n) { |
766 | case 'h': help(); | |
767 | case 'V': version(); | |
768 | case 'd': debugging = 1; break; | |
0b75463f | 769 | case 'D': device = optarg; break; |
1153fd23 | 770 | case 'm': minbuffer = 2 * atol(optarg); break; |
771 | case 'b': readahead = 2 * atol(optarg); break; | |
9086a105 | 772 | case 'x': maxbuffer = 2 * atol(optarg); break; |
345ebe66 | 773 | case 'L': logfp = fopen(optarg, "w"); break; |
e83d0967 RK |
774 | default: fatal(0, "invalid option"); |
775 | } | |
776 | } | |
9086a105 RK |
777 | if(!maxbuffer) |
778 | maxbuffer = 4 * readahead; | |
e83d0967 RK |
779 | argc -= optind; |
780 | argv += optind; | |
781 | if(argc < 1 || argc > 2) | |
782 | fatal(0, "usage: disorder-playrtp [OPTIONS] ADDRESS [PORT]"); | |
783 | sl.n = argc; | |
784 | sl.s = argv; | |
785 | /* Listen for inbound audio data */ | |
0b75463f | 786 | if(!(res = get_address(&sl, &prefs, &sockname))) |
e83d0967 RK |
787 | exit(1); |
788 | if((rtpfd = socket(res->ai_family, | |
789 | res->ai_socktype, | |
790 | res->ai_protocol)) < 0) | |
791 | fatal(errno, "error creating socket"); | |
792 | if(bind(rtpfd, res->ai_addr, res->ai_addrlen) < 0) | |
793 | fatal(errno, "error binding socket to %s", sockname); | |
794 | play_rtp(); | |
795 | return 0; | |
796 | } | |
797 | ||
798 | /* | |
799 | Local Variables: | |
800 | c-basic-offset:2 | |
801 | comment-column:40 | |
802 | fill-column:79 | |
803 | indent-tabs-mode:nil | |
804 | End: | |
805 | */ |