2 * Copyright (C) 1997-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file vss.c The virtual streaming system.
9 * This contains the audio streaming code of para_server which is independent
10 * of the current audio format, audio file selector and of the activated
18 #include "portable_io.h"
25 #include "server.cmdline.h"
33 extern struct misc_meta_data *mmd;
35 extern void dccp_send_init(struct sender *);
36 extern void http_send_init(struct sender *);
37 extern void udp_send_init(struct sender *);
39 /** The list of supported senders. */
40 struct sender senders[] = {
43 .init = http_send_init,
47 .init = dccp_send_init,
51 .init = udp_send_init,
58 /** The possible states of the afs socket. */
59 enum afs_socket_status {
60 /** Socket is inactive. */
62 /** Socket fd was included in the write fd set for select(). */
63 AFS_SOCKET_CHECK_FOR_WRITE,
64 /** vss wrote a request to the socket and waits for reply from afs. */
65 AFS_SOCKET_AFD_PENDING
68 /** The task structure for the virtual streaming system. */
70 /** Copied from the -announce_time command line option. */
71 struct timeval announce_tv;
72 /** End of the announcing interval. */
73 struct timeval data_send_barrier;
74 /** End of the EOF interval. */
75 struct timeval eof_barrier;
76 /** Only used if --autoplay_delay was given. */
77 struct timeval autoplay_barrier;
78 /** Used for afs-server communication. */
80 /** The current state of \a afs_socket. */
81 enum afs_socket_status afsss;
82 /** The memory mapped audio file. */
84 /** Used by the scheduler. */
86 /** Pointer to the header of the mapped audio file. */
87 const char *header_buf;
88 /** Length of the audio file header. */
93 * The list of currently connected fec clients.
95 * Senders may use \ref vss_add_fec_client() to add entries to the list.
97 static struct list_head fec_client_list;
100 * Describes one slice of a FEC group.
102 * FEC slices directly correspond to the data packages sent by the paraslash
103 * senders that use FEC. Each slice is identified by its group number and its
104 * number within the group. All slices have the same size, but the last slice
105 * of the group may not be filled entirely.
108 /** The slice number within the FEC group. */
110 /** The number of used bytes in this slice. */
115 * Data associated with one FEC group.
117 * A FEC group consists of a fixed number of slices and this number is given by
118 * the \a slices_per_group parameter of struct \ref fec_client_parms. Each FEC
119 * group contains a number of chunks of the current audio file.
122 /** The number of the FEC group. */
124 /** Number of bytes in this group. */
126 /** The first chunk of the current audio file belonging to the group. */
127 uint32_t first_chunk;
128 /** The number of chunks contained in this group. */
130 /** The time needed to play all chunks of the group. */
131 struct timeval duration;
132 /** When the first chunk was sent. */
133 struct timeval start;
134 /** \a The group duration divided by \a slices_per_group. */
135 struct timeval slice_duration;
139 * Describes one connected FEC client.
142 /** Parameters requested by the client. */
143 struct fec_client_parms *fcp;
144 /** Used by the core FEC code. */
145 struct fec_parms *parms;
146 /** The position of this client in the fec client list. */
147 struct list_head node;
148 /** When the first slice for this client was sent. */
149 struct timeval stream_start;
150 /** The first chunk sent to this FEC client. */
151 int first_stream_chunk;
152 /** Describes the current group. */
153 struct fec_group group;
154 /** Describes the current slice. */
155 struct fec_slice slice;
156 /** The data to be FEC-encoded (point to a region within the mapped audio file). */
157 const unsigned char **src_data;
158 /** Used for the last source pointer of the last group. */
159 unsigned char *extra_src_buf;
160 /** The size of the buffer for the extra source pointer. */
161 size_t extra_src_buf_size;
162 /** Contains FEC-encoded data. */
163 unsigned char *enc_buf;
164 /** Size of \a enc_buf. */
169 * Get the chunk time of the current audio file.
171 * \return A pointer to a struct containing the chunk time, or NULL,
172 * if currently no audio file is selected.
174 struct timeval *vss_chunk_time(void)
176 if (mmd->afd.afhi.chunk_tv.tv_sec == 0 &&
177 mmd->afd.afhi.chunk_tv.tv_usec == 0)
179 return &mmd->afd.afhi.chunk_tv;
183 * Write a fec header to a buffer.
185 * \param buf The buffer to write to.
186 * \param h The fec header to write.
188 static void write_fec_header(struct fec_client *fc)
190 char *buf = (char *)fc->enc_buf;
192 write_u32(buf, FEC_MAGIC);
194 write_u8(buf + 4, fc->fcp->slices_per_group);
195 write_u8(buf + 5, fc->fcp->data_slices_per_group);
196 write_u32(buf + 6, (uint32_t)0); /* audio header len */
198 write_u32(buf + 10, fc->group.num);
199 write_u32(buf + 14, fc->group.bytes);
201 write_u8(buf + 18, fc->slice.num);
202 write_u16(buf + 20, fc->slice.bytes);
203 memset(buf + 22, 0, 11);
206 static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
208 uint32_t max_group_size, last_payload_size;
209 int i, k = fc->fcp->data_slices_per_group;
211 const char *start_buf;
212 struct timeval tmp, *chunk_tv = vss_chunk_time();
215 if (fc->first_stream_chunk < 0) {
216 fc->stream_start = *now;
217 fc->first_stream_chunk = mmd->current_chunk;
218 fc->group.first_chunk = mmd->current_chunk;
221 fc->group.first_chunk += fc->group.num_chunks;
224 if (fc->group.first_chunk >= mmd->afd.afhi.chunks_total)
226 max_group_size = (fc->fcp->max_slice_bytes - FEC_HEADER_SIZE) * k;
227 afh_get_chunk(fc->group.first_chunk, &mmd->afd.afhi, vsst->map,
229 for (i = fc->group.first_chunk, fc->group.bytes = 0;
230 i < mmd->afd.afhi.chunks_total; i++) {
233 afh_get_chunk(i, &mmd->afd.afhi, vsst->map, &buf, &len);
234 if (fc->group.bytes + len > max_group_size)
236 fc->group.bytes += len;
238 fc->group.num_chunks = i - fc->group.first_chunk;
240 fc->slice.bytes = ROUND_UP(fc->group.bytes, k) / k;
242 /* The last slice will not be fully used */
243 last_payload_size = fc->group.bytes % fc->slice.bytes;
244 if (!last_payload_size)
245 last_payload_size = fc->slice.bytes;
247 tv_scale(fc->group.first_chunk - fc->first_stream_chunk, chunk_tv,
249 tv_add(&fc->stream_start, &tmp, &fc->group.start);
250 if (fc->group.num) /* quick hack to avoid buffer underruns */
251 fc->group.start.tv_sec--;
252 tv_scale(fc->group.num_chunks, chunk_tv, &fc->group.duration);
253 tv_divide(fc->fcp->slices_per_group, &fc->group.duration,
254 &fc->group.slice_duration);
256 for (i = 0; i < k; i++)
257 fc->src_data[i] = (const unsigned char *)start_buf
258 + i * fc->slice.bytes;
260 if (start_buf + k * fc->slice.bytes > vsst->map + mmd->size) {
261 /* can not use last slice as it goes beyond the map */
262 if (fc->extra_src_buf_size < fc->slice.bytes) {
263 fc->extra_src_buf = para_realloc(fc->extra_src_buf, fc->slice.bytes);
264 fc->extra_src_buf_size = fc->slice.bytes;
266 memcpy(fc->extra_src_buf, start_buf + (k - 1) * fc->slice.bytes,
268 memset(fc->extra_src_buf + last_payload_size, 0,
269 fc->slice.bytes - last_payload_size);
270 fc->src_data[k - 1] = fc->extra_src_buf;
272 if (fc->enc_buf_size < fc->slice.bytes + FEC_HEADER_SIZE) {
273 fc->enc_buf_size = fc->slice.bytes + FEC_HEADER_SIZE;
274 fc->enc_buf = para_realloc(fc->enc_buf, fc->enc_buf_size);
276 PARA_INFO_LOG("FEC group %d: %d chunks (%d - %d), duration: %lums\n",
277 fc->group.num, fc->group.num_chunks, fc->group.first_chunk,
278 fc->group.first_chunk + fc->group.num_chunks - 1,
279 tv2ms(&fc->group.duration));
283 static int compute_next_fec_slice(struct fec_client *fc, struct vss_task *vsst)
285 if (fc->first_stream_chunk < 0 || fc->slice.num
286 == fc->fcp->slices_per_group) {
287 if (!setup_next_fec_group(fc, vsst))
290 write_fec_header(fc);
291 fec_encode(fc->parms, fc->src_data, fc->enc_buf + FEC_HEADER_SIZE,
292 fc->slice.num, fc->slice.bytes);
297 * Return a buffer that marks the end of the stream.
299 * \param buf Result pointer.
300 * \return The length of the eof buffer.
302 * This is used for (multicast) udp streaming where closing the socket on the
303 * sender might not give rise to an eof condition at the peer.
305 size_t vss_get_fec_eof_packet(const char **buf)
307 static const char fec_eof_packet[FEC_HEADER_SIZE] =
308 "\xec\x0d\xcc\xfe\0\0\0\0"
312 *buf = fec_eof_packet;
313 return FEC_HEADER_SIZE;
317 * Add one entry to the list of active fec clients.
319 * \param fcp Describes the fec parameters to be used for this client.
320 * \param result An opaque pointer that must be used by remove the client later.
324 int vss_add_fec_client(struct fec_client_parms *fcp, struct fec_client **result)
327 struct fec_client *fc;
329 if (fcp->max_slice_bytes < FEC_HEADER_SIZE + fcp->data_slices_per_group)
330 return -ERRNO_TO_PARA_ERROR(EINVAL);
331 fc = para_calloc(sizeof(*fc));
333 ret = fec_new(fcp->data_slices_per_group, fcp->slices_per_group,
337 fc->first_stream_chunk = -1; /* stream not yet started */
338 fc->src_data = para_malloc(fc->fcp->slices_per_group * sizeof(char *));
339 para_list_add(&fc->node, &fec_client_list);
350 * Remove one entry from the list of active fec clients.
352 * \param fc The client to be removed.
354 void vss_del_fec_client(struct fec_client *fc)
359 free(fc->extra_src_buf);
365 * Compute if/when next slice is due. If it isn't due yet and \a diff is
366 * not \p Null, compute the time difference next - now, where
368 * next = stream_start + (first_group_chunk - first_stream_chunk)
369 * * chunk_time + slice_num * slice_time
371 static int next_slice_is_due(struct fec_client *fc, struct timeval *diff)
373 struct timeval tmp, next;
376 if (fc->first_stream_chunk < 0)
378 tv_scale(fc->slice.num, &fc->group.slice_duration, &tmp);
379 tv_add(&tmp, &fc->group.start, &next);
380 ret = tv_diff(&next, now, diff);
381 return ret < 0? 1 : 0;
384 static void compute_slice_timeout(struct timeval *timeout)
386 struct fec_client *fc;
388 assert(vss_playing());
389 list_for_each_entry(fc, &fec_client_list, node) {
392 if (next_slice_is_due(fc, &diff)) {
394 timeout->tv_usec = 0;
397 /* timeout = min(timeout, diff) */
398 if (tv_diff(&diff, timeout, NULL) < 0)
404 * Check if vss status flag \a P (playing) is set.
406 * \return Greater than zero if playing, zero otherwise.
409 unsigned int vss_playing(void)
411 return mmd->new_vss_status_flags & VSS_PLAYING;
415 * Check if the \a N (next) status flag is set.
417 * \return Greater than zero if set, zero if not.
420 unsigned int vss_next(void)
422 return mmd->new_vss_status_flags & VSS_NEXT;
426 * Check if a reposition request is pending.
428 * \return Greater than zero if true, zero otherwise.
431 unsigned int vss_repos(void)
433 return mmd->new_vss_status_flags & VSS_REPOS;
437 * Check if the vss is currently paused.
439 * \return Greater than zero if paused, zero otherwise.
442 unsigned int vss_paused(void)
444 return !(mmd->new_vss_status_flags & VSS_NEXT)
445 && !(mmd->new_vss_status_flags & VSS_PLAYING);
449 * Check if the vss is currently stopped.
451 * \return Greater than zero if paused, zero otherwise.
454 unsigned int vss_stopped(void)
456 return (mmd->new_vss_status_flags & VSS_NEXT)
457 && !(mmd->new_vss_status_flags & VSS_PLAYING);
460 static int chk_barrier(const char *bname, const struct timeval *barrier,
461 struct timeval *diff, int print_log)
465 if (tv_diff(now, barrier, diff) > 0)
469 PARA_DEBUG_LOG("%s barrier: %lims left\n", bname, ms);
474 * != NULL: timeout for next chunk
475 * NULL: nothing to do
477 static struct timeval *vss_compute_timeout(struct vss_task *vsst)
479 static struct timeval the_timeout;
480 struct timeval next_chunk;
482 if (vss_next() && vsst->map) {
483 /* only sleep a bit, nec*/
484 the_timeout.tv_sec = 0;
485 the_timeout.tv_usec = 100;
488 if (chk_barrier("autoplay_delay", &vsst->autoplay_barrier,
489 &the_timeout, 1) < 0)
491 if (chk_barrier("eof", &vsst->eof_barrier, &the_timeout, 1) < 0)
493 if (chk_barrier("data send", &vsst->data_send_barrier,
494 &the_timeout, 1) < 0)
496 if (!vss_playing() || !vsst->map)
498 compute_chunk_time(mmd->chunks_sent, &mmd->afd.afhi.chunk_tv,
499 &mmd->stream_start, &next_chunk);
500 if (chk_barrier("chunk", &next_chunk, &the_timeout, 0) >= 0) {
501 /* chunk is due or bof */
502 the_timeout.tv_sec = 0;
503 the_timeout.tv_usec = 0;
506 /* compute min of current timeout and next slice time */
507 compute_slice_timeout(&the_timeout);
511 static void vss_eof(struct vss_task *vsst)
514 mmd->stream_start = *now;
517 if (mmd->new_vss_status_flags & VSS_NOMORE)
518 mmd->new_vss_status_flags = VSS_NEXT;
519 tv_add(&mmd->afd.afhi.eof_tv, now, &vsst->eof_barrier);
520 para_munmap(vsst->map, mmd->size);
522 mmd->chunks_sent = 0;
524 mmd->afd.afhi.seconds_total = 0;
525 mmd->afd.afhi.chunk_tv.tv_sec = 0;
526 mmd->afd.afhi.chunk_tv.tv_usec = 0;
527 free(mmd->afd.afhi.chunk_table);
528 mmd->afd.afhi.chunk_table = NULL;
529 free(mmd->afd.afhi.info_string);
530 mmd->afd.afhi.info_string = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_AUDIO_FILE_INFO],
531 status_item_list[SI_TAGINFO1], status_item_list[SI_TAGINFO2]);
532 make_empty_status_items(mmd->afd.verbose_ls_output);
539 * Get the list of all supported audio formats.
541 * \return Aa space separated list of all supported audio formats
542 * It is not allocated at runtime, i.e. there is no need to free
543 * the returned string in the caller.
545 const char *supported_audio_formats(void)
547 return SUPPORTED_AUDIO_FORMATS;
550 static int need_to_request_new_audio_file(struct vss_task *vsst)
554 if (vsst->map) /* have audio file */
556 if (!vss_playing()) /* don't need one */
558 if (mmd->new_vss_status_flags & VSS_NOMORE)
560 if (vsst->afsss == AFS_SOCKET_AFD_PENDING) /* already requested one */
562 if (chk_barrier("autoplay_delay", &vsst->autoplay_barrier,
571 * Compute the timeout for para_server's main select-loop.
573 * This function gets called from para_server to determine the timeout value
574 * for its main select loop.
576 * \param s Pointer to the server scheduler.
577 * \param t Pointer to the vss task structure.
579 * Before the timeout is computed, the current vss status flags are evaluated
580 * and acted upon by calling appropriate functions from the lower layers.
581 * Possible actions include
583 * - request a new audio file from afs,
584 * - shutdown of all senders (stop/pause command),
585 * - reposition the stream (ff/jmp command).
587 static void vss_pre_select(struct sched *s, struct task *t)
590 struct timeval *tv, diff;
591 struct vss_task *vsst = container_of(t, struct vss_task, task);
593 if (!vsst->map || vss_next() || vss_paused() || vss_repos()) {
594 struct fec_client *fc, *tmp;
595 for (i = 0; senders[i].name; i++)
596 if (senders[i].shutdown_clients)
597 senders[i].shutdown_clients();
598 list_for_each_entry_safe(fc, tmp, &fec_client_list, node)
599 fc->first_stream_chunk = -1;
603 else if (vss_paused()) {
604 if (mmd->chunks_sent)
605 tv_add(&mmd->afd.afhi.eof_tv, now, &vsst->eof_barrier);
606 mmd->chunks_sent = 0;
607 } else if (vss_repos()) {
608 tv_add(now, &vsst->announce_tv, &vsst->data_send_barrier);
609 tv_add(&mmd->afd.afhi.eof_tv, now, &vsst->eof_barrier);
610 mmd->chunks_sent = 0;
611 mmd->current_chunk = mmd->repos_request;
612 mmd->new_vss_status_flags &= ~VSS_REPOS;
614 if (need_to_request_new_audio_file(vsst)) {
615 PARA_DEBUG_LOG("ready and playing, but no audio file\n");
616 para_fd_set(vsst->afs_socket, &s->wfds, &s->max_fileno);
617 vsst->afsss = AFS_SOCKET_CHECK_FOR_WRITE;
619 para_fd_set(vsst->afs_socket, &s->rfds, &s->max_fileno);
620 for (i = 0; senders[i].name; i++) {
621 if (!senders[i].pre_select)
623 senders[i].pre_select(&s->max_fileno, &s->rfds, &s->wfds);
625 tv = vss_compute_timeout(vsst);
626 if (tv && tv_diff(tv, &s->timeout, &diff) < 0)
630 static int recv_afs_msg(int afs_socket, int *fd, uint32_t *code, uint32_t *data)
632 char control[255], buf[8];
633 struct msghdr msg = {.msg_iov = NULL};
634 struct cmsghdr *cmsg;
640 iov.iov_len = sizeof(buf);
643 msg.msg_control = control;
644 msg.msg_controllen = sizeof(control);
645 memset(buf, 0, sizeof(buf));
646 ret = recvmsg(afs_socket, &msg, 0);
648 return -ERRNO_TO_PARA_ERROR(errno);
649 if (iov.iov_len != sizeof(buf))
650 return -E_AFS_SHORT_READ;
651 *code = *(uint32_t*)buf;
652 *data = *(uint32_t*)(buf + 4);
653 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
654 if (cmsg->cmsg_level != SOL_SOCKET
655 || cmsg->cmsg_type != SCM_RIGHTS)
657 if ((cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int) != 1)
659 *fd = *(int *)CMSG_DATA(cmsg);
664 static void recv_afs_result(struct vss_task *vsst)
666 int ret, passed_fd, shmid;
667 uint32_t afs_code = 0, afs_data = 0;
670 vsst->afsss = AFS_SOCKET_READY;
671 mmd->afd.afhi.chunk_table = NULL;
672 ret = recv_afs_msg(vsst->afs_socket, &passed_fd, &afs_code, &afs_data);
675 PARA_DEBUG_LOG("fd: %d, code: %u, shmid: %u\n", passed_fd, afs_code,
678 if (afs_code != NEXT_AUDIO_FILE)
683 ret = load_afd(shmid, &mmd->afd);
687 ret = fstat(passed_fd, &statbuf);
689 PARA_ERROR_LOG("fstat error:\n");
690 ret = -ERRNO_TO_PARA_ERROR(errno);
693 mmd->size = statbuf.st_size;
694 mmd->mtime = statbuf.st_mtime;
695 ret = para_mmap(mmd->size, PROT_READ, MAP_PRIVATE, passed_fd,
700 mmd->chunks_sent = 0;
701 mmd->current_chunk = 0;
705 mmd->new_vss_status_flags &= (~VSS_NEXT);
706 afh_get_header(&mmd->afd.afhi, vsst->map, &vsst->header_buf,
710 free(mmd->afd.afhi.chunk_table);
713 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
714 mmd->new_vss_status_flags = VSS_NEXT;
718 * Main sending function.
720 * This function gets called from vss_post_select(). It checks whether the next
721 * chunk of data should be pushed out. It obtains a pointer to the data to be
722 * sent out as well as its length from mmd->afd.afhi. This information is then
723 * passed to each supported sender's send() function as well as to the send()
724 * functions of each registered fec client.
726 static void vss_send(struct vss_task *vsst)
730 struct fec_client *fc, *tmp_fc;
732 if (!vsst->map || !vss_playing())
734 if (chk_barrier("eof", &vsst->eof_barrier, &due, 1) < 0)
736 if (chk_barrier("data send", &vsst->data_send_barrier,
739 if (mmd->current_chunk >= mmd->afd.afhi.chunks_total) { /* eof */
740 mmd->new_vss_status_flags |= VSS_NEXT;
743 if (!mmd->chunks_sent) {
745 mmd->stream_start = *now;
746 tv_scale(mmd->current_chunk, &mmd->afd.afhi.chunk_tv, &tmp);
747 mmd->offset = tv2ms(&tmp);
750 compute_chunk_time(mmd->chunks_sent, &mmd->afd.afhi.chunk_tv,
751 &mmd->stream_start, &due);
752 if (tv_diff(&due, now, NULL) <= 0) {
756 * We call the send function also in case of empty chunks as
757 * they might have still some data queued which can be sent in
760 afh_get_chunk(mmd->current_chunk, &mmd->afd.afhi, vsst->map,
762 for (i = 0; senders[i].name; i++) {
763 if (!senders[i].send)
765 senders[i].send(mmd->current_chunk, mmd->chunks_sent,
766 buf, len, vsst->header_buf, vsst->header_len);
769 list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
770 if (!next_slice_is_due(fc, NULL))
772 if (!compute_next_fec_slice(fc, vsst))
774 PARA_DEBUG_LOG("sending %d:%d (%u bytes)\n", fc->group.num,
775 fc->slice.num, fc->slice.bytes);
776 fc->fcp->send((char *)fc->enc_buf,
777 fc->slice.bytes + FEC_HEADER_SIZE,
778 fc->fcp->private_data);
781 mmd->new_vss_status_flags |= VSS_PLAYING;
783 mmd->current_chunk++;
786 static void vss_post_select(struct sched *s, struct task *t)
789 struct vss_task *vsst = container_of(t, struct vss_task, task);
791 if (mmd->sender_cmd_data.cmd_num >= 0) {
792 int num = mmd->sender_cmd_data.cmd_num,
793 sender_num = mmd->sender_cmd_data.sender_num;
795 if (senders[sender_num].client_cmds[num])
796 senders[sender_num].client_cmds[num](&mmd->sender_cmd_data);
797 mmd->sender_cmd_data.cmd_num = -1;
799 if (vsst->afsss != AFS_SOCKET_CHECK_FOR_WRITE) {
800 if (FD_ISSET(vsst->afs_socket, &s->rfds))
801 recv_afs_result(vsst);
802 } else if (FD_ISSET(vsst->afs_socket, &s->wfds)) {
803 PARA_NOTICE_LOG("requesting new fd from afs\n");
804 ret = send_buffer(vsst->afs_socket, "new");
805 vsst->afsss = AFS_SOCKET_AFD_PENDING;
807 for (i = 0; senders[i].name; i++) {
808 if (!senders[i].post_select)
810 senders[i].post_select(&s->rfds, &s->wfds);
812 if ((vss_playing() && !(mmd->vss_status_flags & VSS_PLAYING)) ||
813 (vss_next() && vss_playing()))
814 tv_add(now, &vsst->announce_tv, &vsst->data_send_barrier);
819 * Initialize the virtual streaming system task.
821 * \param afs_socket The fd for communication with afs.
823 * This also initializes all supported senders and starts streaming
824 * if the --autoplay command line flag was given.
826 void init_vss_task(int afs_socket)
828 static struct vss_task vss_task_struct, *vsst = &vss_task_struct;
830 char *hn = para_hostname(), *home = para_homedir();
831 long unsigned announce_time = conf.announce_time_arg > 0?
832 conf.announce_time_arg : 300,
833 autoplay_delay = conf.autoplay_delay_arg > 0?
834 conf.autoplay_delay_arg : 0;
836 vsst->afs_socket = afs_socket;
837 vsst->task.pre_select = vss_pre_select;
838 vsst->task.post_select = vss_post_select;
839 ms2tv(announce_time, &vsst->announce_tv);
840 PARA_INFO_LOG("announce timeval: %lums\n", tv2ms(&vsst->announce_tv));
841 for (i = 0; senders[i].name; i++) {
842 PARA_NOTICE_LOG("initializing %s sender\n", senders[i].name);
843 senders[i].init(&senders[i]);
847 mmd->sender_cmd_data.cmd_num = -1;
848 make_empty_status_items(mmd->afd.verbose_ls_output);
849 if (conf.autoplay_given) {
851 mmd->vss_status_flags |= VSS_PLAYING;
852 mmd->new_vss_status_flags |= VSS_PLAYING;
853 ms2tv(autoplay_delay, &tmp);
854 tv_add(now, &tmp, &vsst->autoplay_barrier);
855 tv_add(&vsst->autoplay_barrier, &vsst->announce_tv,
856 &vsst->data_send_barrier);
858 INIT_LIST_HEAD(&fec_client_list);
859 register_task(&vsst->task);