* senders.
*/
+#include <regex.h>
#include <dirent.h>
+#include <osl.h>
#include "para.h"
#include "error.h"
const char *header_buf;
/** Length of the audio file header. */
size_t header_len;
+ /** Time between audio file headers are sent. */
+ struct timeval header_interval;
};
/**
*/
static struct list_head fec_client_list;
-/**
- * Describes one slice of a FEC group.
- *
- * FEC slices directly correspond to the data packages sent by the paraslash
- * senders that use FEC. Each slice is identified by its group number and its
- * number within the group. All slices have the same size, but the last slice
- * of the group may not be filled entirely.
- */
-struct fec_slice {
- /** The slice number within the FEC group. */
- uint8_t num;
- /** The number of used bytes in this slice. */
- uint16_t bytes;
-};
-
/**
* Data associated with one FEC group.
*
* A FEC group consists of a fixed number of slices and this number is given by
* the \a slices_per_group parameter of struct \ref fec_client_parms. Each FEC
* group contains a number of chunks of the current audio file.
+ *
+ * FEC slices directly correspond to the data packages sent by the paraslash
+ * senders that use FEC. Each slice is identified by its group number and its
+ * number within the group. All slices have the same size, but the last slice
+ * of the group may not be filled entirely.
*/
struct fec_group {
/** The number of the FEC group. */
uint32_t first_chunk;
/** The number of chunks contained in this group. */
uint32_t num_chunks;
- /** The time needed to play all chunks of the group. */
- struct timeval duration;
/** When the first chunk was sent. */
struct timeval start;
- /** \a The group duration divided by \a slices_per_group. */
+ /** The duration of the full group. */
+ struct timeval duration;
+ /** The group duration divided by the number of slices. */
struct timeval slice_duration;
+ /** Group contains the audio file header that occupies that many slices. */
+ uint8_t num_header_slices;
};
/**
* Describes one connected FEC client.
*/
struct fec_client {
+ /** If negative, this client is temporarily disabled. */
+ int error;
/** Parameters requested by the client. */
struct fec_client_parms *fcp;
/** Used by the core FEC code. */
int first_stream_chunk;
/** Describes the current group. */
struct fec_group group;
- /** Describes the current slice. */
- struct fec_slice slice;
+ /** The current slice. */
+ uint8_t current_slice_num;
/** The data to be FEC-encoded (point to a region within the mapped audio file). */
const unsigned char **src_data;
- /** Used for the last source pointer of the last group. */
+ /** Last time an audio header was sent. */
+ struct timeval next_header_time;
+ /** Used for the last source pointer of an audio file. */
unsigned char *extra_src_buf;
- /** The size of the buffer for the extra source pointer. */
- size_t extra_src_buf_size;
- /** Contains FEC-encoded data. */
+ /** Extra slices needed to store largest chunk + header. */
+ int num_extra_slices;
+ /** Contains the FEC-encoded data. */
unsigned char *enc_buf;
- /** Size of \a enc_buf. */
- size_t enc_buf_size;
};
/**
* \param buf The buffer to write to.
* \param h The fec header to write.
*/
-static void write_fec_header(struct fec_client *fc)
+static void write_fec_header(struct fec_client *fc, struct vss_task *vsst)
{
char *buf = (char *)fc->enc_buf;
+ struct fec_group *g = &fc->group;
+ struct fec_client_parms *p = fc->fcp;
write_u32(buf, FEC_MAGIC);
- write_u8(buf + 4, fc->fcp->slices_per_group);
- write_u8(buf + 5, fc->fcp->data_slices_per_group);
- write_u32(buf + 6, (uint32_t)0); /* audio header len */
+ write_u8(buf + 4, p->slices_per_group + fc->num_extra_slices);
+ write_u8(buf + 5, p->data_slices_per_group + fc->num_extra_slices);
+ write_u32(buf + 6, g->num_header_slices? vsst->header_len : 0);
+
+ write_u32(buf + 10, g->num);
+ write_u32(buf + 14, g->bytes);
+
+ write_u8(buf + 18, fc->current_slice_num);
+ write_u16(buf + 20, p->max_slice_bytes - FEC_HEADER_SIZE);
+ write_u8(buf + 22, g->first_chunk? 0 : 1);
+ write_u8(buf + 23, vsst->header_len? 1 : 0);
+ memset(buf + 24, 0, 7);
+}
+
+static int need_audio_header(struct fec_client *fc, struct vss_task *vsst)
+{
+ if (!mmd->current_chunk) {
+ tv_add(now, &vsst->header_interval, &fc->next_header_time);
+ return 0;
+ }
+ if (!vsst->header_buf)
+ return 0;
+ if (!vsst->header_len)
+ return 0;
+ if (fc->group.num && tv_diff(&fc->next_header_time, now, NULL) > 0)
+ return 0;
+ tv_add(now, &vsst->header_interval, &fc->next_header_time);
+ return 1;
+}
+
+static int num_slices(long unsigned bytes, struct fec_client *fc, uint8_t *result)
+{
+ unsigned long m = fc->fcp->max_slice_bytes - FEC_HEADER_SIZE;
+ unsigned rv, redundant_slices = fc->fcp->slices_per_group
+ - fc->fcp->data_slices_per_group;
+
+ if (!m)
+ return -E_BAD_CT;
+ rv = (bytes + m - 1) / m;
+ if (rv + redundant_slices > 255)
+ return -E_BAD_CT;
+ *result = rv;
+ return 1;
+}
- write_u32(buf + 10, fc->group.num);
- write_u32(buf + 14, fc->group.bytes);
+/* set group start and group duration */
+static void set_group_timing(struct fec_client *fc, struct fec_group *g)
+{
+ struct timeval *chunk_tv = vss_chunk_time();
- write_u8(buf + 18, fc->slice.num);
- write_u16(buf + 20, fc->slice.bytes);
- memset(buf + 22, 0, 11);
+ tv_scale(g->num_chunks, chunk_tv, &g->duration);
+ tv_divide(fc->fcp->slices_per_group + fc->num_extra_slices,
+ &g->duration, &g->slice_duration);
+ PARA_DEBUG_LOG("durations (group/chunk/slice): %lu/%lu/%lu\n",
+ tv2ms(&g->duration), tv2ms(chunk_tv), tv2ms(&g->slice_duration));
}
static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
{
- uint32_t max_group_size, last_payload_size;
- int i, k = fc->fcp->data_slices_per_group;
+ int ret, i, k, data_slices;
size_t len;
- const char *start_buf;
- struct timeval tmp, *chunk_tv = vss_chunk_time();
+ const char *buf, *start_buf;
+ struct fec_group *g = &fc->group;
+ unsigned slice_bytes = fc->fcp->max_slice_bytes - FEC_HEADER_SIZE;
+ uint32_t max_data_size;
- assert(chunk_tv);
if (fc->first_stream_chunk < 0) {
+ uint8_t hs, ds; /* needed header/data slices */
+ uint8_t rs = fc->fcp->slices_per_group
+ - fc->fcp->data_slices_per_group; /* redundant slices */
+ int n;
+
+ ret = num_slices(vsst->header_len, fc, &hs);
+ if (ret < 0)
+ return ret;
+ ret = num_slices(afh_get_largest_chunk_size(&mmd->afd.afhi),
+ fc, &ds);
+ if (ret < 0)
+ return ret;
+ k = (int)hs + ds;
+ if (k > 255)
+ return -E_BAD_CT;
+ if (k < fc->fcp->data_slices_per_group)
+ k = fc->fcp->data_slices_per_group;
+ n = k + rs;
+ fc->num_extra_slices = k - fc->fcp->data_slices_per_group;
+ PARA_NOTICE_LOG("fec parms %d:%d:%d (%d extra slices)\n",
+ slice_bytes, k, n, fc->num_extra_slices);
+ fec_free(fc->parms);
+ fc->src_data = para_realloc(fc->src_data, k * sizeof(char *));
+ ret = fec_new(k, n, &fc->parms);
+ if (ret < 0)
+ return ret;
fc->stream_start = *now;
fc->first_stream_chunk = mmd->current_chunk;
- fc->group.first_chunk = mmd->current_chunk;
- fc->group.num = 0;
+ g->first_chunk = mmd->current_chunk;
+ g->num = 0;
+ g->start = *now;
} else {
- fc->group.first_chunk += fc->group.num_chunks;
- fc->group.num++;
+ /*
+ * Start and duration of this group depend only on the previous
+ * group. Compute the new group start as g->start += g->duration.
+ */
+ struct timeval tmp = g->start;
+ tv_add(&tmp, &g->duration, &g->start);
+ k = fc->fcp->data_slices_per_group + fc->num_extra_slices;
+ set_group_timing(fc, g);
+ g->first_chunk += g->num_chunks;
+ g->num++;
}
- if (fc->group.first_chunk >= mmd->afd.afhi.chunks_total)
+ if (g->first_chunk >= mmd->afd.afhi.chunks_total)
return 0;
- max_group_size = (fc->fcp->max_slice_bytes - FEC_HEADER_SIZE) * k;
- afh_get_chunk(fc->group.first_chunk, &mmd->afd.afhi, vsst->map,
- &start_buf, &len);
- for (i = fc->group.first_chunk, fc->group.bytes = 0;
- i < mmd->afd.afhi.chunks_total; i++) {
- const char *buf;
-
+ if (need_audio_header(fc, vsst)) {
+ ret = num_slices(vsst->header_len, fc, &g->num_header_slices);
+ if (ret < 0)
+ return ret;
+ } else
+ g->num_header_slices = 0;
+ afh_get_chunk(g->first_chunk, &mmd->afd.afhi, vsst->map, &start_buf,
+ &len);
+ data_slices = k - g->num_header_slices;
+ assert(data_slices);
+ max_data_size = slice_bytes * data_slices;
+ g->bytes = 0;
+ for (i = g->first_chunk; i < mmd->afd.afhi.chunks_total; i++) {
afh_get_chunk(i, &mmd->afd.afhi, vsst->map, &buf, &len);
- if (fc->group.bytes + len > max_group_size)
+ if (g->bytes + len > max_data_size)
break;
- fc->group.bytes += len;
+ g->bytes += len;
+ }
+ g->num_chunks = i - g->first_chunk;
+ assert(g->num_chunks);
+ fc->current_slice_num = 0;
+ if (g->num == 0)
+ set_group_timing(fc, g);
+
+ /* setup header slices */
+ buf = vsst->header_buf;
+ for (i = 0; i < g->num_header_slices; i++) {
+ fc->src_data[i] = (const unsigned char *)buf;
+ buf += slice_bytes;
}
- fc->group.num_chunks = i - fc->group.first_chunk;
- fc->slice.num = 0;
- fc->slice.bytes = ROUND_UP(fc->group.bytes, k) / k;
- /* FIXME: Avoid division by zero in a better way */
- if (!fc->slice.bytes)
- return 0;
- /* The last slice will not be fully used */
- last_payload_size = fc->group.bytes % fc->slice.bytes;
- if (!last_payload_size)
- last_payload_size = fc->slice.bytes;
-
- tv_scale(fc->group.first_chunk - fc->first_stream_chunk, chunk_tv,
- &tmp);
- tv_add(&fc->stream_start, &tmp, &fc->group.start);
- if (fc->group.num) /* quick hack to avoid buffer underruns */
- fc->group.start.tv_sec--;
- tv_scale(fc->group.num_chunks, chunk_tv, &fc->group.duration);
- tv_divide(fc->fcp->slices_per_group, &fc->group.duration,
- &fc->group.slice_duration);
-
- for (i = 0; i < k; i++)
- fc->src_data[i] = (const unsigned char *)start_buf
- + i * fc->slice.bytes;
-
- if (start_buf + k * fc->slice.bytes > vsst->map + mmd->size) {
- /* can not use last slice as it goes beyond the map */
- if (fc->extra_src_buf_size < fc->slice.bytes) {
- fc->extra_src_buf = para_realloc(fc->extra_src_buf, fc->slice.bytes);
- fc->extra_src_buf_size = fc->slice.bytes;
- }
- memcpy(fc->extra_src_buf, start_buf + (k - 1) * fc->slice.bytes,
- last_payload_size);
- memset(fc->extra_src_buf + last_payload_size, 0,
- fc->slice.bytes - last_payload_size);
- fc->src_data[k - 1] = fc->extra_src_buf;
+ /* setup data slices */
+ buf = start_buf;
+ for (i = g->num_header_slices; i < k; i++) {
+ if (buf + slice_bytes > vsst->map + mmd->size)
+ /*
+ * Can not use the memory mapped audio file for this
+ * slice as it goes beyond the map. This slice will not
+ * be fully used.
+ */
+ break;
+ fc->src_data[i] = (const unsigned char *)buf;
+ buf += slice_bytes;
}
- if (fc->enc_buf_size < fc->slice.bytes + FEC_HEADER_SIZE) {
- fc->enc_buf_size = fc->slice.bytes + FEC_HEADER_SIZE;
- fc->enc_buf = para_realloc(fc->enc_buf, fc->enc_buf_size);
+ if (i < k) {
+ uint32_t payload_size = vsst->map + mmd->size - buf;
+ memcpy(fc->extra_src_buf, buf, payload_size);
+ fc->src_data[i] = fc->extra_src_buf;
+ i++;
+ /* use arbitrary data for all remaining slices */
+ buf = vsst->map;
+ for (; i < k; i++)
+ fc->src_data[i] = (const unsigned char *)buf;
}
- PARA_INFO_LOG("FEC group %d: %d chunks (%d - %d), duration: %lums\n",
- fc->group.num, fc->group.num_chunks, fc->group.first_chunk,
- fc->group.first_chunk + fc->group.num_chunks - 1,
- tv2ms(&fc->group.duration));
+ PARA_DEBUG_LOG("FEC group %d: %d chunks (%d - %d), "
+ "%d header slices, %d data slices\n",
+ g->num, g->num_chunks, g->first_chunk,
+ g->first_chunk + g->num_chunks - 1,
+ g->num_header_slices, data_slices
+ );
return 1;
}
static int compute_next_fec_slice(struct fec_client *fc, struct vss_task *vsst)
{
- if (fc->first_stream_chunk < 0 || fc->slice.num
- == fc->fcp->slices_per_group) {
- if (!setup_next_fec_group(fc, vsst))
+ assert(fc->error >= 0);
+ if (fc->first_stream_chunk < 0 || fc->current_slice_num
+ == fc->fcp->slices_per_group + fc->num_extra_slices) {
+ int ret = setup_next_fec_group(fc, vsst);
+ if (ret == 0)
return 0;
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ PARA_ERROR_LOG("FEC client temporarily disabled\n");
+ fc->error = ret;
+ return fc->error;
+ }
}
- write_fec_header(fc);
+ write_fec_header(fc, vsst);
fec_encode(fc->parms, fc->src_data, fc->enc_buf + FEC_HEADER_SIZE,
- fc->slice.num, fc->slice.bytes);
+ fc->current_slice_num,
+ fc->fcp->max_slice_bytes - FEC_HEADER_SIZE);
return 1;
}
goto err;
fc->first_stream_chunk = -1; /* stream not yet started */
fc->src_data = para_malloc(fc->fcp->slices_per_group * sizeof(char *));
+ fc->enc_buf = para_calloc(fc->fcp->max_slice_bytes);
+ fc->num_extra_slices = 0;
+ fc->extra_src_buf = para_calloc(fc->fcp->max_slice_bytes);
+ fc->next_header_time.tv_sec = 0;
para_list_add(&fc->node, &fec_client_list);
*result = fc;
return 1;
if (fc->first_stream_chunk < 0)
return 1;
- tv_scale(fc->slice.num, &fc->group.slice_duration, &tmp);
+ tv_scale(fc->current_slice_num, &fc->group.slice_duration, &tmp);
tv_add(&tmp, &fc->group.start, &next);
ret = tv_diff(&next, now, diff);
return ret < 0? 1 : 0;
list_for_each_entry(fc, &fec_client_list, node) {
struct timeval diff;
+ if (fc->error < 0)
+ continue;
if (next_slice_is_due(fc, &diff)) {
timeout->tv_sec = 0;
timeout->tv_usec = 0;
}
}
+static void set_eof_barrier(struct vss_task *vsst)
+{
+ struct fec_client *fc;
+ struct timeval timeout = {1, 0}, *chunk_tv = vss_chunk_time();
+
+ if (!chunk_tv)
+ goto out;
+ list_for_each_entry(fc, &fec_client_list, node) {
+ struct timeval group_duration;
+
+ if (fc->error < 0)
+ continue;
+ tv_scale(fc->group.num_chunks, chunk_tv, &group_duration);
+ if (tv_diff(&timeout, &group_duration, NULL) < 0)
+ timeout = group_duration;
+ }
+out:
+ tv_add(now, &timeout, &vsst->eof_barrier);
+}
+
/**
* Check if vss status flag \a P (playing) is set.
*
static void vss_eof(struct vss_task *vsst)
{
- mmd->stream_start = *now;
if (!vsst->map)
return;
if (mmd->new_vss_status_flags & VSS_NOMORE)
mmd->new_vss_status_flags = VSS_NEXT;
- tv_add(&mmd->afd.afhi.eof_tv, now, &vsst->eof_barrier);
+ set_eof_barrier(vsst);
para_munmap(vsst->map, mmd->size);
vsst->map = NULL;
mmd->chunks_sent = 0;
- mmd->offset = 0;
+ //mmd->offset = 0;
mmd->afd.afhi.seconds_total = 0;
mmd->afd.afhi.chunk_tv.tv_sec = 0;
mmd->afd.afhi.chunk_tv.tv_usec = 0;
free(mmd->afd.afhi.chunk_table);
mmd->afd.afhi.chunk_table = NULL;
- free(mmd->afd.afhi.info_string);
- mmd->afd.afhi.info_string = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_AUDIO_FILE_INFO],
- status_item_list[SI_TAGINFO1], status_item_list[SI_TAGINFO2]);
- make_empty_status_items(mmd->afd.verbose_ls_output);
mmd->mtime = 0;
mmd->size = 0;
mmd->events++;
return 1;
}
-
-
/**
- * Compute the timeout for para_server's main select-loop.
- *
- * This function gets called from para_server to determine the timeout value
- * for its main select loop.
+ * Compute the timeout for the main select-loop of the scheduler.
*
* \param s Pointer to the server scheduler.
* \param t Pointer to the vss task structure.
for (i = 0; senders[i].name; i++)
if (senders[i].shutdown_clients)
senders[i].shutdown_clients();
- list_for_each_entry_safe(fc, tmp, &fec_client_list, node)
+ list_for_each_entry_safe(fc, tmp, &fec_client_list, node) {
fc->first_stream_chunk = -1;
+ fc->error = 0;
+ }
+ mmd->stream_start.tv_sec = 0;
+ mmd->stream_start.tv_usec = 0;
}
if (vss_next())
vss_eof(vsst);
else if (vss_paused()) {
if (mmd->chunks_sent)
- tv_add(&mmd->afd.afhi.eof_tv, now, &vsst->eof_barrier);
+ set_eof_barrier(vsst);
mmd->chunks_sent = 0;
} else if (vss_repos()) {
+ struct timeval offset;
tv_add(now, &vsst->announce_tv, &vsst->data_send_barrier);
- tv_add(&mmd->afd.afhi.eof_tv, now, &vsst->eof_barrier);
+ set_eof_barrier(vsst);
mmd->chunks_sent = 0;
mmd->current_chunk = mmd->repos_request;
mmd->new_vss_status_flags &= ~VSS_REPOS;
+ tv_scale(mmd->current_chunk, &mmd->afd.afhi.chunk_tv, &offset);
+ mmd->offset = tv2ms(&offset);
}
if (need_to_request_new_audio_file(vsst)) {
PARA_DEBUG_LOG("ready and playing, but no audio file\n");
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level != SOL_SOCKET
|| cmsg->cmsg_type != SCM_RIGHTS)
- continue;
+ continue;
if ((cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int) != 1)
- continue;
+ continue;
*fd = *(int *)CMSG_DATA(cmsg);
}
return 1;
struct stat statbuf;
vsst->afsss = AFS_SOCKET_READY;
- mmd->afd.afhi.chunk_table = NULL;
ret = recv_afs_msg(vsst->afs_socket, &passed_fd, &afs_code, &afs_data);
if (ret < 0)
goto err;
*/
static void vss_send(struct vss_task *vsst)
{
- int i;
+ int i, fec_active = 0;
struct timeval due;
struct fec_client *fc, *tmp_fc;
if (chk_barrier("data send", &vsst->data_send_barrier,
&due, 1) < 0)
return;
+ list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
+ if (fc->error < 0)
+ continue;
+ if (!next_slice_is_due(fc, NULL)) {
+ fec_active = 1;
+ continue;
+ }
+ if (compute_next_fec_slice(fc, vsst) <= 0)
+ continue;
+ PARA_DEBUG_LOG("sending %d:%d (%u bytes)\n", fc->group.num,
+ fc->current_slice_num, fc->fcp->max_slice_bytes);
+ fc->fcp->send((char *)fc->enc_buf,
+ fc->fcp->max_slice_bytes,
+ fc->fcp->private_data);
+ fc->current_slice_num++;
+ fec_active = 1;
+ }
if (mmd->current_chunk >= mmd->afd.afhi.chunks_total) { /* eof */
- mmd->new_vss_status_flags |= VSS_NEXT;
+ if (!fec_active)
+ mmd->new_vss_status_flags |= VSS_NEXT;
return;
}
- if (!mmd->chunks_sent) {
- struct timeval tmp;
- mmd->stream_start = *now;
- tv_scale(mmd->current_chunk, &mmd->afd.afhi.chunk_tv, &tmp);
- mmd->offset = tv2ms(&tmp);
- mmd->events++;
- }
compute_chunk_time(mmd->chunks_sent, &mmd->afd.afhi.chunk_tv,
&mmd->stream_start, &due);
if (tv_diff(&due, now, NULL) <= 0) {
const char *buf;
size_t len;
+
+ if (!mmd->chunks_sent) {
+ mmd->stream_start = *now;
+ mmd->events++;
+ }
/*
* We call the send function also in case of empty chunks as
* they might have still some data queued which can be sent in
senders[i].send(mmd->current_chunk, mmd->chunks_sent,
buf, len, vsst->header_buf, vsst->header_len);
}
+ mmd->chunks_sent++;
+ mmd->current_chunk++;
}
- list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
- if (!next_slice_is_due(fc, NULL))
- continue;
- if (!compute_next_fec_slice(fc, vsst))
- continue;
- PARA_DEBUG_LOG("sending %d:%d (%u bytes)\n", fc->group.num,
- fc->slice.num, fc->slice.bytes);
- fc->fcp->send((char *)fc->enc_buf,
- fc->slice.bytes + FEC_HEADER_SIZE,
- fc->fcp->private_data);
- fc->slice.num++;
- }
- mmd->new_vss_status_flags |= VSS_PLAYING;
- mmd->chunks_sent++;
- mmd->current_chunk++;
}
static void vss_post_select(struct sched *s, struct task *t)
int ret, i;
struct vss_task *vsst = container_of(t, struct vss_task, task);
+
if (mmd->sender_cmd_data.cmd_num >= 0) {
int num = mmd->sender_cmd_data.cmd_num,
sender_num = mmd->sender_cmd_data.sender_num;
} else if (FD_ISSET(vsst->afs_socket, &s->wfds)) {
PARA_NOTICE_LOG("requesting new fd from afs\n");
ret = send_buffer(vsst->afs_socket, "new");
- vsst->afsss = AFS_SOCKET_AFD_PENDING;
+ if (ret < 0)
+ PARA_CRIT_LOG("%s\n", para_strerror(-ret));
+ else
+ vsst->afsss = AFS_SOCKET_AFD_PENDING;
}
for (i = 0; senders[i].name; i++) {
if (!senders[i].post_select)
conf.announce_time_arg : 300,
autoplay_delay = conf.autoplay_delay_arg > 0?
conf.autoplay_delay_arg : 0;
-
+ vsst->header_interval.tv_sec = 5; /* should this be configurable? */
vsst->afs_socket = afs_socket;
vsst->task.pre_select = vss_pre_select;
vsst->task.post_select = vss_post_select;
free(hn);
free(home);
mmd->sender_cmd_data.cmd_num = -1;
- make_empty_status_items(mmd->afd.verbose_ls_output);
if (conf.autoplay_given) {
struct timeval tmp;
mmd->vss_status_flags |= VSS_PLAYING;