2 * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
19 /** \file afs.c audio file sending functions
21 * This contains the audio sending part of para_server which is independent of
22 * the current audio format, audio file selector and of the activated senders.
25 #include <sys/time.h> /* gettimeofday */
26 #include "server.cmdline.h"
34 extern const char *status_item_list[];
36 static struct timeval announce_tv;
37 static struct timeval data_send_barrier;
38 static struct timeval eof_barrier;
40 extern struct misc_meta_data *mmd;
41 extern struct audio_file_selector dblist[];
42 extern struct sender senders[];
43 extern struct gengetopt_args_info conf;
45 static FILE *audio_file = NULL;
48 void mp3_init(void *);
52 void ogg_init(void *);
56 * the list of supported audio formats
58 struct audio_format afl[] = {
78 * check if audio file sender is playing
80 * \return greater than zero if playing, zero otherwise.
83 unsigned int afs_playing(void)
85 return mmd->new_afs_status_flags & AFS_PLAYING;
89 * check if 'next' flag is set afs_status_flags
91 * \return greater than zero if set, zero if not.
94 unsigned int afs_next(void)
96 return mmd->new_afs_status_flags & AFS_NEXT;
100 * check if a reposition request is pending
102 * \return greater than zero if true, zero otherwise.
105 unsigned int afs_repos(void)
107 return mmd->new_afs_status_flags & AFS_REPOS;
111 * check if audio file sender is paused
113 * \return greater than zero if paused, zero otherwise.
116 unsigned int afs_paused(void)
118 return !(mmd->new_afs_status_flags & AFS_NEXT)
119 && !(mmd->new_afs_status_flags & AFS_PLAYING);
123 * get the name of the given audio format
124 * \param i the audio format number
126 * This returns a pointer to statically allocated memory so it
127 * must not be freed by the caller.
129 const char *audio_format_name(int i)
131 return i >= 0? afl[i].name : "(none)";
135 * initialize the audio file sender
137 * Call the init functions of all supported audio format handlers and
138 * initialize all supported senders.
143 char *hn = para_hostname(), *home = para_homedir();
145 PARA_DEBUG_LOG("supported audio formats: %s\n",
146 SUPPORTED_AUDIO_FORMATS);
147 for (i = 0; afl[i].name; i++) {
148 PARA_NOTICE_LOG("initializing %s handler\n",
150 afl[i].init(&afl[i]);
152 ms2tv(conf.announce_time_arg, &announce_tv);
153 PARA_INFO_LOG("announce timeval: %lu:%lu\n", announce_tv.tv_sec, announce_tv.tv_usec);
154 for (i = 0; senders[i].name; i++) {
155 PARA_NOTICE_LOG("initializing %s sender\n", senders[i].name);
156 senders[i].init(&senders[i]);
162 static int get_file_info(int i)
164 return afl[i].get_file_info(audio_file, mmd->audio_file_info,
165 &mmd->chunks_total, &mmd->seconds_total);
169 * guess the audio format judging from filename
170 * \param name the filename
172 * \return This function returns -1 if it has no idea what kind of audio
173 * file this might be. Otherwise the (non-negative) number of the audio format
176 static int guess_audio_format(const char *name)
179 int i, len1 = strlen(name), len2;
181 for (i = 0; afl[i].name; i++) {
182 len2 = strlen(afl[i].name);
185 if (!strncasecmp(name + (len1 - len2), afl[i].name, len2)) {
186 PARA_DEBUG_LOG("might be %s\n", afl[i].name);
193 static int get_audio_format(int omit)
197 for (i = 0; afl[i].name; i++) {
198 if (i == omit || !afl[i].get_file_info)
201 if (get_file_info(i) > 0)
205 return -E_AUDIO_FORMAT;
211 static int update_mmd(void)
214 struct stat file_status;
216 i = guess_audio_format(mmd->filename);
217 if (i < 0 || get_file_info(i) < 0)
218 i = get_audio_format(i);
221 mmd->audio_format = i;
222 mmd->chunks_sent = 0;
223 mmd->current_chunk = 0;
225 if (fstat(fileno(audio_file), &file_status) == -1)
227 mmd->size = file_status.st_size;
228 mmd->mtime = file_status.st_mtime;
230 PARA_NOTICE_LOG("next audio file: %s\n", mmd->filename);
234 static void get_song(void)
236 char **sl = dblist[mmd->selector_num].get_audio_file_list(10);
241 for (i = 0; sl[i]; i++) {
243 PARA_INFO_LOG("trying %s\n", sl[i]);
244 if (strlen(sl[i]) >= _POSIX_PATH_MAX)
246 audio_file = fopen(sl[i], "r");
249 strcpy(mmd->filename, sl[i]);
250 if (update_mmd() < 0) {
256 if (dblist[mmd->selector_num].update_audio_file)
257 dblist[mmd->selector_num].update_audio_file(sl[i]);
258 PARA_DEBUG_LOG("%s", "success\n");
259 mmd->new_afs_status_flags &= (~AFS_NEXT);
260 gettimeofday(&now, NULL);
261 tv_add(&now, &announce_tv, &data_send_barrier);
265 PARA_ERROR_LOG("%s", "no valid files found\n");
267 mmd->new_afs_status_flags = AFS_NEXT;
270 for (i = 0; sl[i]; i++)
276 static int chk_barrier(const char *bname, const struct timeval *now,
277 const struct timeval *barrier, struct timeval *diff, int log)
281 if (tv_diff(now, barrier, diff) > 0)
285 PARA_DEBUG_LOG("%s barrier: %lims left\n", bname, ms);
289 static void afs_next_chunk_time(struct timeval *due)
293 tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp);
294 tv_add(&tmp, &mmd->stream_start, due);
298 * != NULL: timeout for next chunk
299 * NULL: nothing to do
301 static struct timeval *afs_compute_timeout(void)
303 static struct timeval the_timeout;
304 struct timeval now, next_chunk;
306 if (afs_next() && mmd->audio_format >= 0) {
307 /* only sleep a bit, nec*/
308 the_timeout.tv_sec = 0;
309 the_timeout.tv_usec = 100;
312 gettimeofday(&now, NULL);
313 if (chk_barrier("eof", &now, &eof_barrier, &the_timeout, 1) < 0)
315 if (chk_barrier("data send", &now, &data_send_barrier,
316 &the_timeout, 1) < 0)
318 if (mmd->audio_format < 0 || !afs_playing() || !audio_file)
320 afs_next_chunk_time(&next_chunk);
321 if (chk_barrier(afl[mmd->audio_format].name, &now, &next_chunk,
322 &the_timeout, 0) < 0)
324 /* chunk is due or bof */
325 the_timeout.tv_sec = 0;
326 the_timeout.tv_usec = 0;
330 static void afs_eof(struct audio_format *af)
336 if (!af || !audio_file) {
337 for (i = 0; senders[i].name; i++)
338 senders[i].shutdown_clients();
341 gettimeofday(&now, NULL);
342 tv_add(&af->eof_tv, &now, &eof_barrier);
343 af->close_audio_file();
345 mmd->audio_format = -1;
347 mmd->chunks_sent = 0;
349 mmd->seconds_total = 0;
350 tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_AUDIO_INFO1],
351 status_item_list[SI_AUDIO_INFO2], status_item_list[SI_AUDIO_INFO3]);
352 strcpy(mmd->audio_file_info, tmp);
354 tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_DBINFO1],
355 status_item_list[SI_DBINFO2], status_item_list[SI_DBINFO3]);
356 strcpy(mmd->selector_info, tmp);
358 mmd->filename[0] = '\0';
364 * compute the timeout for para_server's main select-loop
366 * This function gets called from para_server to determine the timeout value
367 * for its main select loop.
369 * Before the timeout is computed, the current afs status flags are evaluated
370 * and acted upon by calling appropriate functions from the lower layers.
371 * Possible actions include
373 * - request a new file list from the current dabase tool (audio file change)
374 * - shutdown of all senders (stop/pause command)
375 * - repositioning of the stream (ff/jmp command)
377 * \return A pointer to a struct timeval containing the timeout for the next
378 * chunk of data to be sent, or NULL if we're not sending right now.
380 struct timeval *afs_preselect(void)
382 struct audio_format *af = NULL;
386 format = mmd->audio_format;
390 for (i = 0; senders[i].name; i++)
391 senders[i].shutdown_clients();
392 if (afs_next() && af) {
394 return afs_compute_timeout();
396 if (afs_paused() || afs_repos()) {
397 for (i = 0; senders[i].name; i++)
398 senders[i].shutdown_clients();
401 if (!afs_paused() || mmd->chunks_sent) {
402 gettimeofday(&now, NULL);
403 tv_add(&af->eof_tv, &now, &eof_barrier);
406 tv_add(&now, &announce_tv, &data_send_barrier);
407 if (mmd->new_afs_status_flags & AFS_NOMORE)
408 mmd->new_afs_status_flags = AFS_NEXT;
410 mmd->chunks_sent = 0;
412 if (af && afs_repos() && mmd->current_chunk != mmd->repos_request)
413 af->reposition_stream(mmd->repos_request);
415 mmd->new_afs_status_flags &= ~(AFS_REPOS);
416 mmd->current_chunk = mmd->repos_request;
418 ret = afs_compute_timeout();
419 if (!ret && !audio_file && afs_playing() &&
420 !(mmd->new_afs_status_flags & AFS_NOMORE)) {
421 PARA_DEBUG_LOG("%s", "ready and playing, but no audio file\n");
429 * afs_send_chunk - paraslash's main sending function
431 * This function gets called from para_server as soon as the next chunk of
432 * data should be pushed out. It first calls the read_chunk() function of
433 * the current audio format handler to obtain a pointer to the data to be
434 * sent out as well as its length. This information is then passed to each
435 * supported sender's send() function which does the actual sending.
437 * Return value: Positive return value on success, zero on eof and negative
441 void afs_send_chunk(void)
444 struct audio_format *af;
447 struct timeval now, due;
449 if (mmd->audio_format < 0 || !audio_file || !afs_playing())
451 af = &afl[mmd->audio_format];
452 gettimeofday(&now, NULL);
453 afs_next_chunk_time(&due);
454 if (tv_diff(&due, &now, NULL) > 0)
456 buf = af->read_chunk(mmd->current_chunk, &ret);
457 mmd->new_afs_status_flags &= ~(AFS_NEXT | AFS_REPOS);
460 mmd->new_afs_status_flags = AFS_NEXT;
462 mmd->new_afs_status_flags |= AFS_NEXT;
466 if (!mmd->chunks_sent) {
468 gettimeofday(&mmd->stream_start, NULL);
469 tv_scale(mmd->current_chunk, &af->chunk_tv, &tmp);
470 mmd->offset = tv2ms(&tmp);
473 for (i = 0; senders[i].name; i++)
474 senders[i].send(af, mmd->current_chunk,
475 mmd->chunks_sent, buf, ret);
476 mmd->new_afs_status_flags |= AFS_PLAYING;
478 mmd->current_chunk++;