/*
- * Copyright (C) 1997-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2010 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
* senders.
*/
+#include <regex.h>
#include <dirent.h>
+#include <osl.h>
#include "para.h"
#include "error.h"
#include "net.h"
#include "server.cmdline.h"
#include "list.h"
-#include "vss.h"
#include "send.h"
+#include "vss.h"
#include "ipc.h"
#include "fd.h"
#include "sched.h"
uint32_t num_chunks;
/** When the first chunk was sent. */
struct timeval start;
+ /** 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. */
- unsigned num_header_slices;
+ uint8_t num_header_slices;
+};
+
+enum fec_client_state {
+ FEC_STATE_NONE = 0, /**< not initialized and not enabled */
+ FEC_STATE_DISABLED, /**< temporarily disabled */
+ FEC_STATE_READY_TO_RUN /**< initialized and enabled */
};
/**
* Describes one connected FEC client.
*/
struct fec_client {
+ /** Current state of the client */
+ enum fec_client_state state;
+ /** The connected sender client (transport layer). */
+ struct sender_client *sc;
/** Parameters requested by the client. */
struct fec_client_parms *fcp;
/** Used by the core FEC code. */
int num_extra_slices;
/** Contains the FEC-encoded data. */
unsigned char *enc_buf;
+ /** Maximal packet size. */
+ int mps;
};
/**
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_u16(buf + 20, fc->mps - 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)
+static bool 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;
+ return false;
}
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;
+ return false;
+ if (vsst->header_len == 0)
+ return false;
+ if (fc->group.num && tv_diff(&fc->next_header_time, now, NULL) > 0)
+ return false;
tv_add(now, &vsst->header_interval, &fc->next_header_time);
- return 1;
+ return true;
}
-static uint8_t num_slices(long unsigned bytes, struct fec_client *fc)
+static int num_slices(long unsigned bytes, int mps, int rs)
{
- uint16_t m = fc->fcp->max_slice_bytes - FEC_HEADER_SIZE;
- return (bytes + m - 1) / m;
+ int m = mps - FEC_HEADER_SIZE;
+ int ret;
+
+ assert(m > 0);
+ assert(rs > 0);
+ ret = DIV_ROUND_UP(bytes, m);
+ if (ret + rs > 255)
+ return -E_BAD_CT;
+ return ret;
+}
+
+/* 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();
+
+ 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 initialize_fec_client(struct fec_client *fc, struct vss_task *vsst)
+{
+ int k, n, ret, mps;
+ int hs, ds, rs; /* header/data/redundant slices */
+ struct fec_client_parms *fcp = fc->fcp;
+
+ /* set mps */
+ if (fcp->init_fec) {
+ /*
+ * Set the maximum slice size to the Maximum Packet Size if the
+ * transport protocol allows to determine this value. The user
+ * can specify a slice size up to this value.
+ */
+ ret = fcp->init_fec(fc->sc);
+ if (ret < 0)
+ return ret;
+ mps = ret;
+ } else
+ mps = generic_max_transport_msg_size(fc->sc->fd);
+ if (mps <= FEC_HEADER_SIZE)
+ return -ERRNO_TO_PARA_ERROR(EINVAL);
+
+ rs = fc->fcp->slices_per_group - fc->fcp->data_slices_per_group;
+ ret = num_slices(vsst->header_len, mps, rs);
+ if (ret < 0)
+ goto err;
+ hs = ret;
+ ret = num_slices(mmd->afd.max_chunk_size, mps, rs);
+ if (ret < 0)
+ goto err;
+ ds = ret;
+ k = ret + ds;
+ if (k < fc->fcp->data_slices_per_group)
+ k = fc->fcp->data_slices_per_group;
+ n = k + rs;
+ PARA_CRIT_LOG("hs: %d, ds: %d, rs: %d, k: %d, n: %d\n", hs, ds, rs, k, n);
+ fec_free(fc->parms);
+ ret = fec_new(k, n, &fc->parms);
+ if (ret < 0)
+ return ret;
+ fc->num_extra_slices = k - fc->fcp->data_slices_per_group;
+ PARA_NOTICE_LOG("fec parms %d:%d:%d (%d extra slices)\n",
+ mps, k, n, fc->num_extra_slices);
+ fc->src_data = para_realloc(fc->src_data, k * sizeof(char *));
+ fc->enc_buf = para_realloc(fc->enc_buf, mps);
+ memset(fc->enc_buf, 0, mps);
+ fc->extra_src_buf = para_realloc(fc->extra_src_buf, mps);
+ memset(fc->extra_src_buf, 0, mps);
+
+ fc->mps = mps;
+ fc->state = FEC_STATE_READY_TO_RUN;
+ fc->next_header_time.tv_sec = 0;
+ fc->stream_start = *now;
+ fc->first_stream_chunk = mmd->current_chunk;
+ return 1;
+err:
+ fec_free(fc->parms);
+ return ret;
}
static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
{
- int i, k, data_slices;
+ int ret, i, k, n, data_slices;
size_t len;
const char *buf, *start_buf;
- struct timeval tmp, *chunk_tv = vss_chunk_time();
struct fec_group *g = &fc->group;
- unsigned slice_bytes = fc->fcp->max_slice_bytes - FEC_HEADER_SIZE;
+ unsigned slice_bytes;
uint32_t max_data_size;
- assert(chunk_tv);
- k = fc->fcp->data_slices_per_group + fc->num_extra_slices;
- if (fc->first_stream_chunk < 0) {
- uint32_t largest = afh_get_largest_chunk_size(&mmd->afd.afhi)
- + vsst->header_len;
- uint8_t needed = num_slices(largest, fc), want;
- if (needed > fc->fcp->data_slices_per_group)
- PARA_WARNING_LOG("fec parms insufficient for this audio file\n");
- want = PARA_MAX(needed, fc->fcp->data_slices_per_group);
- if (want != k) {
- int ret;
- fec_free(fc->parms);
- fc->src_data = para_realloc(fc->src_data, want * sizeof(char *));
- ret = fec_new(want, want + fc->fcp->slices_per_group
- - fc->fcp->data_slices_per_group, &fc->parms);
- if (ret < 0)
- return ret;
- k = want;
- fc->num_extra_slices = 0;
- if (k > fc->fcp->data_slices_per_group) {
- fc->num_extra_slices = k - fc->fcp->data_slices_per_group;
- PARA_NOTICE_LOG("using %d extra slices\n",
- fc->num_extra_slices);
- }
- }
- fc->stream_start = *now;
- fc->first_stream_chunk = mmd->current_chunk;
+ if (fc->state == FEC_STATE_NONE) {
+ ret = initialize_fec_client(fc, vsst);
+ if (ret < 0)
+ return ret;
g->first_chunk = mmd->current_chunk;
g->num = 0;
+ g->start = *now;
+
} else {
+ struct timeval tmp;
+ if (g->first_chunk + g->num_chunks >= mmd->afd.afhi.chunks_total)
+ return 0;
+ /*
+ * Start and duration of this group depend only on the previous
+ * group. Compute the new group start as g->start += g->duration.
+ */
+ tmp = g->start;
+ tv_add(&tmp, &g->duration, &g->start);
+ set_group_timing(fc, g);
g->first_chunk += g->num_chunks;
g->num++;
}
- if (g->first_chunk >= mmd->afd.afhi.chunks_total)
- return 0;
- if (need_audio_header(fc, vsst))
- g->num_header_slices = num_slices(vsst->header_len, fc);
- else
+ slice_bytes = fc->mps - FEC_HEADER_SIZE;
+ PARA_CRIT_LOG("slice_bytes: %d\n", slice_bytes);
+ k = fc->fcp->data_slices_per_group + fc->num_extra_slices;
+ n = fc->fcp->slices_per_group + fc->num_extra_slices;
+ PARA_CRIT_LOG("k: %d, n: %d\n", k, n);
+ if (need_audio_header(fc, vsst)) {
+ ret = num_slices(vsst->header_len, slice_bytes, n - k);
+ if (ret < 0)
+ return ret;
+ g->num_header_slices = ret;
+ } else
g->num_header_slices = 0;
afh_get_chunk(g->first_chunk, &mmd->afd.afhi, vsst->map, &start_buf,
&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 < k; i++)
fc->src_data[i] = (const unsigned char *)buf;
}
-
- /* setup group timing */
- tv_scale(g->first_chunk - fc->first_stream_chunk, chunk_tv, &tmp);
- tv_add(&fc->stream_start, &tmp, &g->start);
- if (g->num) /* quick hack to avoid buffer underruns */
- g->start.tv_sec--;
- tv_scale(g->num_chunks, chunk_tv, &tmp); /* group duration */
- tv_divide(fc->fcp->slices_per_group + fc->num_extra_slices,
- &tmp, &g->slice_duration);
-
- PARA_DEBUG_LOG("FEC group %d: %d chunks (%d - %d), %d header slices, %d data slices\n",
+ 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
);
- PARA_DEBUG_LOG("durations (group/chunk/slice): %lu/%lu/%lu\n",
- tv2ms(&tmp), tv2ms(chunk_tv), tv2ms(&g->slice_duration));
return 1;
}
static int compute_next_fec_slice(struct fec_client *fc, struct vss_task *vsst)
{
- if (fc->first_stream_chunk < 0 || fc->current_slice_num
+ if (fc->state == FEC_STATE_NONE || fc->current_slice_num
== fc->fcp->slices_per_group + fc->num_extra_slices) {
- if (!setup_next_fec_group(fc, vsst))
+ 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->state = FEC_STATE_DISABLED;
+ return ret;
+ }
}
write_fec_header(fc, vsst);
fec_encode(fc->parms, fc->src_data, fc->enc_buf + FEC_HEADER_SIZE,
- fc->current_slice_num,
- fc->fcp->max_slice_bytes - FEC_HEADER_SIZE);
+ fc->current_slice_num, fc->mps - FEC_HEADER_SIZE);
return 1;
}
/**
* Add one entry to the list of active fec clients.
*
- * \param fcp Describes the fec parameters to be used for this client.
- * \param result An opaque pointer that must be used by remove the client later.
+ * \param sc Generic sender_client data of the transport layer.
+ * \param fcp FEC parameters as supplied by the transport layer.
*
- * \return Standard.
+ * \return Newly allocated fec_client struct.
*/
-int vss_add_fec_client(struct fec_client_parms *fcp, struct fec_client **result)
+struct fec_client *vss_add_fec_client(struct sender_client *sc,
+ struct fec_client_parms *fcp)
{
- int ret;
- struct fec_client *fc;
+ struct fec_client *fc = para_calloc(sizeof(*fc));
- if (fcp->max_slice_bytes < FEC_HEADER_SIZE + fcp->data_slices_per_group)
- return -ERRNO_TO_PARA_ERROR(EINVAL);
- fc = para_calloc(sizeof(*fc));
+ fc->sc = sc;
fc->fcp = fcp;
- ret = fec_new(fcp->data_slices_per_group, fcp->slices_per_group,
- &fc->parms);
- if (ret < 0)
- 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;
-err:
- fec_free(fc->parms);
- free(fc);
- *result = NULL;
- return ret;
+ return fc;
}
/**
struct timeval tmp, next;
int ret;
- if (fc->first_stream_chunk < 0)
+ if (fc->state == FEC_STATE_NONE)
return 1;
tv_scale(fc->current_slice_num, &fc->group.slice_duration, &tmp);
tv_add(&tmp, &fc->group.start, &next);
{
struct fec_client *fc;
- assert(vss_playing());
list_for_each_entry(fc, &fec_client_list, node) {
struct timeval diff;
+ if (fc->state != FEC_STATE_READY_TO_RUN)
+ 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->state != FEC_STATE_READY_TO_RUN)
+ 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++;
}
-/**
- * Get the list of all supported audio formats.
- *
- * \return Aa space separated list of all supported audio formats
- * It is not allocated at runtime, i.e. there is no need to free
- * the returned string in the caller.
- */
-const char *supported_audio_formats(void)
-{
- return SUPPORTED_AUDIO_FORMATS;
-}
-
static int need_to_request_new_audio_file(struct vss_task *vsst)
{
struct timeval diff;
return 1;
}
+static void set_mmd_offset(void)
+{
+ struct timeval offset;
+ tv_scale(mmd->current_chunk, &mmd->afd.afhi.chunk_tv, &offset);
+ mmd->offset = tv2ms(&offset);
+}
+
/**
- * 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.
static void vss_pre_select(struct sched *s, struct task *t)
{
int i;
- struct timeval *tv, diff;
+ struct timeval *tv;
struct vss_task *vsst = container_of(t, struct vss_task, task);
if (!vsst->map || vss_next() || vss_paused() || vss_repos()) {
if (senders[i].shutdown_clients)
senders[i].shutdown_clients();
list_for_each_entry_safe(fc, tmp, &fec_client_list, node)
- fc->first_stream_chunk = -1;
+ fc->state = FEC_STATE_NONE;
+ 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()) {
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;
+ set_mmd_offset();
}
if (need_to_request_new_audio_file(vsst)) {
PARA_DEBUG_LOG("ready and playing, but no audio file\n");
senders[i].pre_select(&s->max_fileno, &s->rfds, &s->wfds);
}
tv = vss_compute_timeout(vsst);
- if (tv && tv_diff(tv, &s->timeout, &diff) < 0)
- s->timeout = *tv;
+ if (tv)
+ sched_request_timeout(tv, s);
}
static int recv_afs_msg(int afs_socket, int *fd, uint32_t *code, uint32_t *data)
return 1;
}
-static void recv_afs_result(struct vss_task *vsst)
+static void recv_afs_result(struct vss_task *vsst, fd_set *rfds)
{
int ret, passed_fd, shmid;
uint32_t afs_code = 0, afs_data = 0;
struct stat statbuf;
- vsst->afsss = AFS_SOCKET_READY;
- mmd->afd.afhi.chunk_table = NULL;
+ if (!FD_ISSET(vsst->afs_socket, rfds))
+ return;
ret = recv_afs_msg(vsst->afs_socket, &passed_fd, &afs_code, &afs_data);
+ if (ret == -ERRNO_TO_PARA_ERROR(EAGAIN))
+ return;
if (ret < 0)
goto err;
+ vsst->afsss = AFS_SOCKET_READY;
PARA_DEBUG_LOG("fd: %d, code: %u, shmid: %u\n", passed_fd, afs_code,
afs_data);
ret = -E_NOFD;
*/
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->state == FEC_STATE_DISABLED)
+ 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->mps);
+ fc->fcp->send_fec(fc->sc, (char *)fc->enc_buf, fc->mps);
+ 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;
}
compute_chunk_time(mmd->chunks_sent, &mmd->afd.afhi.chunk_tv,
size_t len;
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++;
+ set_mmd_offset();
}
/*
* We call the send function also in case of empty chunks as
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->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++;
- }
}
static void vss_post_select(struct sched *s, struct task *t)
int num = mmd->sender_cmd_data.cmd_num,
sender_num = mmd->sender_cmd_data.sender_num;
- if (senders[sender_num].client_cmds[num])
- senders[sender_num].client_cmds[num](&mmd->sender_cmd_data);
+ if (senders[sender_num].client_cmds[num]) {
+ ret = senders[sender_num].client_cmds[num]
+ (&mmd->sender_cmd_data);
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ }
mmd->sender_cmd_data.cmd_num = -1;
}
- if (vsst->afsss != AFS_SOCKET_CHECK_FOR_WRITE) {
- if (FD_ISSET(vsst->afs_socket, &s->rfds))
- recv_afs_result(vsst);
- } else if (FD_ISSET(vsst->afs_socket, &s->wfds)) {
+ if (vsst->afsss != AFS_SOCKET_CHECK_FOR_WRITE)
+ recv_afs_result(vsst, &s->rfds);
+ 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)
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;
projects / paraslash.git / blobdiff