/*
- * 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.
*/
#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. */
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 {
- /** If negative, this client is temporarily disabled. */
- int error;
+ /** 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. */
return 1;
}
-static int num_slices(long unsigned bytes, struct fec_client *fc, uint8_t *result)
+static int num_slices(long unsigned bytes, int mps, int rs)
{
- 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;
+ int m = mps - FEC_HEADER_SIZE;
+ int ret;
- if (!m)
+ assert(m > 0);
+ assert(rs > 0);
+ ret = (bytes + m - 1) / m;
+ if (ret + rs > 255)
return -E_BAD_CT;
- rv = (bytes + m - 1) / m;
- if (rv + redundant_slices > 255)
- return -E_BAD_CT;
- *result = rv;
- return 1;
+ return ret;
}
-static void set_slice_duration(struct fec_client *fc, struct fec_group *g)
+/* set group start and group duration */
+static void set_group_timing(struct fec_client *fc, struct fec_group *g)
{
- struct timeval group_duration, *chunk_tv = vss_chunk_time();
+ struct timeval *chunk_tv = vss_chunk_time();
- tv_scale(g->num_chunks, chunk_tv, &group_duration);
+ tv_scale(g->num_chunks, chunk_tv, &g->duration);
tv_divide(fc->fcp->slices_per_group + fc->num_extra_slices,
- &group_duration, &g->slice_duration);
+ &g->duration, &g->slice_duration);
PARA_DEBUG_LOG("durations (group/chunk/slice): %lu/%lu/%lu\n",
- tv2ms(&group_duration), tv2ms(chunk_tv), tv2ms(&g->slice_duration));
+ 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(afh_get_largest_chunk_size(&mmd->afd.afhi),
+ 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->fcp->max_slice_bytes = 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 ret, 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, want;
-
- ret = num_slices(largest, fc, &needed);
+ if (fc->state == FEC_STATE_NONE) {
+ ret = initialize_fec_client(fc, vsst);
if (ret < 0)
return ret;
- 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) {
- 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;
g->first_chunk = mmd->current_chunk;
g->num = 0;
+ g->start = *now;
+
} else {
- /* use duration of the previous group for the timing of this group */
- set_slice_duration(fc, g);
+ 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;
+ slice_bytes = fc->fcp->max_slice_bytes - 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, fc, &g->num_header_slices);
+ ret = num_slices(vsst->header_len, fc->fcp->max_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,
assert(g->num_chunks);
fc->current_slice_num = 0;
if (g->num == 0)
- set_slice_duration(fc, g);
+ set_group_timing(fc, g);
/* setup header slices */
buf = vsst->header_buf;
g->first_chunk + g->num_chunks - 1,
g->num_header_slices, data_slices
);
- /* set group start */
- if (g->num != 0 && vsst->header_len != 0 && fc->first_stream_chunk == 0)
- /* chunk #0 is the audio file header */
- tv_scale(g->first_chunk - 1, chunk_tv, &tmp);
- else
- tv_scale(g->first_chunk - fc->first_stream_chunk,
- chunk_tv, &tmp);
- tv_add(&fc->stream_start, &tmp, &g->start);
return 1;
}
static int compute_next_fec_slice(struct fec_client *fc, struct vss_task *vsst)
{
- assert(fc->error >= 0);
- 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) {
int ret = setup_next_fec_group(fc, vsst);
if (ret == 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;
+ fc->state = FEC_STATE_DISABLED;
+ return ret;
}
}
write_fec_header(fc, vsst);
/**
* 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->error < 0)
+ if (fc->state != FEC_STATE_READY_TO_RUN)
continue;
if (next_slice_is_due(fc, &diff)) {
timeout->tv_sec = 0;
list_for_each_entry(fc, &fec_client_list, node) {
struct timeval group_duration;
- if (fc->error < 0)
+ 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)
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;
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 the main select-loop of the scheduler.
*
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()) {
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) {
- fc->first_stream_chunk = -1;
- fc->error = 0;
- }
+ list_for_each_entry_safe(fc, tmp, &fec_client_list, node)
+ fc->state = FEC_STATE_NONE;
mmd->stream_start.tv_sec = 0;
mmd->stream_start.tv_usec = 0;
}
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;
+ 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;
&due, 1) < 0)
return;
list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
- if (fc->error < 0)
+ switch (fc->state) {
+ case FEC_STATE_DISABLED:
continue;
+ case FEC_STATE_NONE:
+ case FEC_STATE_READY_TO_RUN:
+ break;
+ }
if (!next_slice_is_due(fc, NULL)) {
fec_active = 1;
continue;
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->fcp->send_fec(fc->sc, (char *)fc->enc_buf,
+ fc->fcp->max_slice_bytes);
fc->current_slice_num++;
fec_active = 1;
}
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
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");
if (ret < 0)
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