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.
26 #include <sys/time.h> /* gettimeofday */
27 #include "server.cmdline.h"
35 extern const char *status_item_list[];
37 static struct timeval announce_tv;
38 static struct timeval data_send_barrier;
39 static struct timeval eof_barrier;
41 extern struct misc_meta_data *mmd;
42 extern struct audio_file_selector selectors[];
43 extern struct sender senders[];
45 static FILE *audio_file = NULL;
48 void mp3_init(struct audio_format_handler *);
52 void ogg_init(struct audio_format_handler *);
55 void aac_afh_init(struct audio_format_handler *);
59 * the list of supported audio formats
61 static struct audio_format_handler afl[] = {
84 #define FOR_EACH_AUDIO_FORMAT(i) for (i = 0; afl[i].name; i++)
87 * check if audio file sender is playing
89 * \return greater than zero if playing, zero otherwise.
92 unsigned int afs_playing(void)
94 return mmd->new_afs_status_flags & AFS_PLAYING;
98 * check if 'next' flag is set afs_status_flags
100 * \return greater than zero if set, zero if not.
103 unsigned int afs_next(void)
105 return mmd->new_afs_status_flags & AFS_NEXT;
109 * check if a reposition request is pending
111 * \return greater than zero if true, zero otherwise.
114 unsigned int afs_repos(void)
116 return mmd->new_afs_status_flags & AFS_REPOS;
120 * check if audio file sender is paused
122 * \return greater than zero if paused, zero otherwise.
125 unsigned int afs_paused(void)
127 return !(mmd->new_afs_status_flags & AFS_NEXT)
128 && !(mmd->new_afs_status_flags & AFS_PLAYING);
132 * get the name of the given audio format
133 * \param i the audio format number
135 * This returns a pointer to statically allocated memory so it
136 * must not be freed by the caller.
138 const char *audio_format_name(int i)
140 return i >= 0? afl[i].name : "(none)";
144 * initialize the audio file sender
146 * Call the init functions of all supported audio format handlers and
147 * initialize all supported senders.
152 char *hn = para_hostname(), *home = para_homedir();
154 PARA_DEBUG_LOG("supported audio formats: %s\n",
155 SUPPORTED_AUDIO_FORMATS);
156 for (i = 0; afl[i].name; i++) {
157 PARA_NOTICE_LOG("initializing %s handler\n",
159 afl[i].init(&afl[i]);
161 ms2tv(conf.announce_time_arg, &announce_tv);
162 PARA_INFO_LOG("announce timeval: %lums\n", tv2ms(&announce_tv));
163 for (i = 0; senders[i].name; i++) {
164 PARA_NOTICE_LOG("initializing %s sender\n", senders[i].name);
165 senders[i].init(&senders[i]);
171 static int get_file_info(int i)
173 return afl[i].get_file_info(audio_file, mmd->audio_file_info,
174 &mmd->chunks_total, &mmd->seconds_total);
178 * guess the audio format judging from filename
180 * \param name the filename
182 * \return This function returns -1 if it has no idea what kind of audio
183 * file this might be. Otherwise the (non-negative) number of the audio format
186 int guess_audio_format(const char *name)
188 int i,j, len = strlen(name);
190 FOR_EACH_AUDIO_FORMAT(i) {
191 for (j = 0; afl[i].suffixes[j]; j++) {
192 const char *p = afl[i].suffixes[j];
193 int plen = strlen(p);
196 if (name[len - plen - 1] != '.')
198 if (strcasecmp(name + len - plen, p))
200 // PARA_DEBUG_LOG("might be %s\n", audio_format_name(i));
207 static int get_audio_format(int omit)
211 FOR_EACH_AUDIO_FORMAT(i) {
212 if (i == omit || !afl[i].get_file_info)
215 if (get_file_info(i) > 0)
219 return -E_AUDIO_FORMAT;
225 static int update_mmd(void)
228 struct stat file_status;
230 i = guess_audio_format(mmd->filename);
231 if (i < 0 || get_file_info(i) < 0)
232 i = get_audio_format(i);
235 mmd->audio_format = i;
236 mmd->chunks_sent = 0;
237 mmd->current_chunk = 0;
239 if (fstat(fileno(audio_file), &file_status) == -1)
241 mmd->size = file_status.st_size;
242 mmd->mtime = file_status.st_mtime;
244 PARA_NOTICE_LOG("next audio file: %s\n", mmd->filename);
248 static void get_song(void)
250 char **sl = selectors[mmd->selector_num].get_audio_file_list(10);
255 for (i = 0; sl[i]; i++) {
257 PARA_INFO_LOG("trying %s\n", sl[i]);
258 if (strlen(sl[i]) >= _POSIX_PATH_MAX)
260 audio_file = fopen(sl[i], "r");
263 strcpy(mmd->filename, sl[i]);
264 if (update_mmd() < 0) {
270 if (selectors[mmd->selector_num].update_audio_file)
271 selectors[mmd->selector_num].update_audio_file(sl[i]);
272 PARA_DEBUG_LOG("%s", "success\n");
273 mmd->new_afs_status_flags &= (~AFS_NEXT);
274 gettimeofday(&now, NULL);
275 tv_add(&now, &announce_tv, &data_send_barrier);
279 PARA_ERROR_LOG("%s", "no valid files found\n");
281 mmd->new_afs_status_flags = AFS_NEXT;
284 for (i = 0; sl[i]; i++)
290 static int chk_barrier(const char *bname, const struct timeval *now,
291 const struct timeval *barrier, struct timeval *diff,
296 if (tv_diff(now, barrier, diff) > 0)
300 PARA_DEBUG_LOG("%s barrier: %lims left\n", bname, ms);
304 static void afs_next_chunk_time(struct timeval *due)
308 tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp);
309 tv_add(&tmp, &mmd->stream_start, due);
313 * != NULL: timeout for next chunk
314 * NULL: nothing to do
316 static struct timeval *afs_compute_timeout(void)
318 static struct timeval the_timeout;
319 struct timeval now, next_chunk;
321 if (afs_next() && mmd->audio_format >= 0) {
322 /* only sleep a bit, nec*/
323 the_timeout.tv_sec = 0;
324 the_timeout.tv_usec = 100;
327 gettimeofday(&now, NULL);
328 if (chk_barrier("eof", &now, &eof_barrier, &the_timeout, 1) < 0)
330 if (chk_barrier("data send", &now, &data_send_barrier,
331 &the_timeout, 1) < 0)
333 if (mmd->audio_format < 0 || !afs_playing() || !audio_file)
335 afs_next_chunk_time(&next_chunk);
336 if (chk_barrier(afl[mmd->audio_format].name, &now, &next_chunk,
337 &the_timeout, 0) < 0)
339 /* chunk is due or bof */
340 the_timeout.tv_sec = 0;
341 the_timeout.tv_usec = 0;
345 static void afs_eof(struct audio_format_handler *af)
351 if (!af || !audio_file) {
352 for (i = 0; senders[i].name; i++)
353 senders[i].shutdown_clients();
356 gettimeofday(&now, NULL);
357 tv_add(&af->eof_tv, &now, &eof_barrier);
358 af->close_audio_file();
360 mmd->audio_format = -1;
362 mmd->chunks_sent = 0;
364 mmd->seconds_total = 0;
365 tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_AUDIO_INFO1],
366 status_item_list[SI_AUDIO_INFO2], status_item_list[SI_AUDIO_INFO3]);
367 strcpy(mmd->audio_file_info, tmp);
369 tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_DBINFO1],
370 status_item_list[SI_DBINFO2], status_item_list[SI_DBINFO3]);
371 strcpy(mmd->selector_info, tmp);
373 mmd->filename[0] = '\0';
379 * get the header and of the current audio file
381 * \param header_len the length of the header is stored here
383 * \return a pointer to a buffer containing the header, or NULL, if no audio
384 * file is selected or if the current audio format does not need special header
388 char *afs_get_header(int *header_len)
391 if (mmd->audio_format < 0)
393 if (!afl[mmd->audio_format].get_header_info)
395 return afl[mmd->audio_format].get_header_info(header_len);
397 const char *supported_audio_formats(void)
399 return SUPPORTED_AUDIO_FORMATS;
403 * get the chunk time of the current audio file
405 * \return a pointer to a struct containing the chunk time, or NULL,
406 * if currently no audio file is selected.
408 struct timeval *afs_chunk_time(void)
410 if (mmd->audio_format < 0)
412 return &afl[mmd->audio_format].chunk_tv;
416 * compute the timeout for para_server's main select-loop
418 * This function gets called from para_server to determine the timeout value
419 * for its main select loop.
421 * Before the timeout is computed, the current afs status flags are evaluated
422 * and acted upon by calling appropriate functions from the lower layers.
423 * Possible actions include
425 * - request a new file list from the current audio file selector
426 * - shutdown of all senders (stop/pause command)
427 * - reposition the stream (ff/jmp command)
429 * \return A pointer to a struct timeval containing the timeout for the next
430 * chunk of data to be sent, or NULL if we're not sending right now.
432 struct timeval *afs_preselect(void)
434 struct audio_format_handler *af = NULL;
438 format = mmd->audio_format;
442 for (i = 0; senders[i].name; i++)
443 senders[i].shutdown_clients();
444 if (afs_next() && af) {
446 return afs_compute_timeout();
448 if (afs_paused() || afs_repos()) {
449 for (i = 0; senders[i].name; i++)
450 senders[i].shutdown_clients();
453 gettimeofday(&now, NULL);
454 if (!afs_paused() || mmd->chunks_sent)
455 tv_add(&af->eof_tv, &now, &eof_barrier);
457 tv_add(&now, &announce_tv, &data_send_barrier);
458 if (mmd->new_afs_status_flags & AFS_NOMORE)
459 mmd->new_afs_status_flags = AFS_NEXT;
461 mmd->chunks_sent = 0;
463 if (af && afs_repos() && mmd->current_chunk != mmd->repos_request)
464 af->reposition_stream(mmd->repos_request);
466 mmd->new_afs_status_flags &= ~(AFS_REPOS);
467 mmd->current_chunk = mmd->repos_request;
469 ret = afs_compute_timeout();
470 if (!ret && !audio_file && afs_playing() &&
471 !(mmd->new_afs_status_flags & AFS_NOMORE)) {
472 PARA_DEBUG_LOG("%s", "ready and playing, but no audio file\n");
480 * afs_send_chunk - paraslash's main sending function
482 * This function gets called from para_server as soon as the next chunk of
483 * data should be pushed out. It first calls the read_chunk() function of
484 * the current audio format handler to obtain a pointer to the data to be
485 * sent out as well as its length. This information is then passed to each
486 * supported sender's send() function which does the actual sending.
488 * Return value: Positive return value on success, zero on eof and negative
492 void afs_send_chunk(void)
495 struct audio_format_handler *af;
498 struct timeval now, due;
500 if (mmd->audio_format < 0 || !audio_file || !afs_playing())
502 af = &afl[mmd->audio_format];
503 gettimeofday(&now, NULL);
504 afs_next_chunk_time(&due);
505 if (tv_diff(&due, &now, NULL) > 0)
507 if (chk_barrier("eof", &now, &eof_barrier, &due, 1) < 0)
509 if (chk_barrier("data send", &now, &data_send_barrier,
512 buf = af->read_chunk(mmd->current_chunk, &ret);
513 mmd->new_afs_status_flags &= ~AFS_REPOS;
516 mmd->new_afs_status_flags = AFS_NEXT;
518 mmd->new_afs_status_flags |= AFS_NEXT;
522 if (!mmd->chunks_sent) {
524 gettimeofday(&mmd->stream_start, NULL);
525 tv_scale(mmd->current_chunk, &af->chunk_tv, &tmp);
526 mmd->offset = tv2ms(&tmp);
529 for (i = 0; senders[i].name; i++)
530 senders[i].send(mmd->current_chunk, mmd->chunks_sent, buf, ret);
531 mmd->new_afs_status_flags |= AFS_PLAYING;
533 mmd->current_chunk++;