int
redundancy_decoder_decode(u_char *state,
struct s_pb *in,
struct s_pb *out,
timestamp_t now)
{
struct s_pb_iterator *pi;
u_char *c_get;
channel_data *c;
uint32_t clen;
timestamp_t cplayout;
pb_iterator_create(in, &pi);
assert(pi != NULL);
assert(state == NULL); /* No decoder state necesssary */
UNUSED(state);
while(pb_iterator_get_at(pi, &c_get, &clen, &cplayout)) {
c = (channel_data*)c_get;
assert(c != NULL);
assert(clen == sizeof(channel_data));
if (ts_gt(cplayout, now)) {
break;
}
pb_iterator_detach_at(pi, &c_get, &clen, &cplayout);
c = (channel_data*)c_get;
assert(c->nelem == 1);
redundancy_decoder_output(c->elem[0], out, cplayout);
channel_data_destroy(&c, sizeof(channel_data));
}
pb_iterator_destroy(in, &pi);
return TRUE;
}
int
layered_decoder_decode(u_char *state,
struct s_pb *in,
struct s_pb *out,
timestamp_t now)
{
struct s_pb_iterator *pi;
u_char *c_get;
channel_data *c;
uint32_t clen;
timestamp_t playout;
UNUSED(state);
pb_iterator_create(in, &pi);
assert(pi != NULL);
while(pb_iterator_get_at(pi, &c_get, &clen, &playout)) {
c = (channel_data*)c_get;
assert(c != NULL);
assert(clen == sizeof(channel_data));
if (ts_gt(playout, now)) {
/* Playout point of unit is after now. Stop! */
break;
}
pb_iterator_detach_at(pi, &c_get, &clen, &playout);
layered_decoder_reorganise(c, out, playout);
}
pb_iterator_destroy(in, &pi);
return TRUE;
}
static media_data *
red_media_data_create_or_get(struct s_pb *p, timestamp_t playout)
{
struct s_pb_iterator *pi;
u_char *md_get;
media_data *md;
uint32_t md_len, success;
timestamp_t md_playout;
pb_iterator_create(p, &pi);
/* iterator is attached to sentinel - can move back or forwards */
while(pb_iterator_retreat(pi)) {
success = pb_iterator_get_at(pi, &md_get, &md_len, &md_playout);
md = (media_data*)md_get;
assert(success);
if (ts_eq(md_playout, playout)) {
goto done;
} else if (ts_gt(playout, md_playout)) {
/* we have gone too far back */
break;
}
}
/* Not found in playout buffer */
media_data_create(&md, 0);
success = pb_add(p, (u_char*)md, sizeof(media_data), playout);
assert(success);
done:
pb_iterator_destroy(p, &pi);
return md;
}
static uint32_t
make_pdu(struct s_pb_iterator *pbi,
uint32_t upp,
codec_id_t cid,
channel_data *out)
{
struct s_pb_iterator *p;
uint32_t i, j, md_len, used;
u_char *md_get;
media_data *md;
timestamp_t playout;
int success;
pb_iterator_dup(&p, pbi);
used = 0;
for (i = 0; i < upp; i++) {
success = pb_iterator_get_at(p, &md_get, &md_len, &playout);
md = (media_data*)md_get;
assert(success); /* We could rewind this far so must be able to get something! */
/* Find first compatible coding */
for(j = 0; j < md->nrep && md->rep[j]->id != cid; j++);
if (j == md->nrep) {
/* could not find coding */
debug_msg("coding not found\n");
break;
}
if (i == 0 && md->rep[j]->state != NULL) {
/* This is first unit in block so we want state */
assert(out->elem[used]->data == NULL);
out->elem[used]->data = md->rep[j]->state;
out->elem[used]->data_len = md->rep[j]->state_len;
md->rep[j]->state = NULL;
md->rep[j]->state_len = 0;
used++;
}
assert(used < out->nelem);
assert(out->elem[used]->data == NULL);
out->elem[used]->data = md->rep[j]->data;
out->elem[used]->data_len = md->rep[j]->data_len;
md->rep[j]->data = NULL;
md->rep[j]->data_len = 0;
md->rep[j]->id = 0; /* nobble this unit since we have taken it's data */
used++;
assert(used <= out->nelem);
pb_iterator_advance(p);
}
pb_iterator_destroy(pb_iterator_get_playout_buffer(pbi), &p);
xmemchk();
return used;
}
int
pktbuf_peak_last(pktbuf_t *pb,
rtp_packet **pp)
{
timestamp_t playout;
uint32_t psize;
if (pb_iterator_ffwd(pb->rtp_iterator) == FALSE) {
return FALSE;
}
pb_iterator_get_at(pb->rtp_iterator, (u_char**)pp, &psize, &playout);
return TRUE;
}
int
pb_iterator_detach_at (pb_iterator_t *pi,
u_char **data,
uint32_t *data_len,
timestamp_t *playout)
{
pb_iterator_t *iterators;
pb_node_t *curr_node, *next_node;
uint16_t i, n_iterators;
pb_validate(pi->buffer);
if (pb_iterator_get_at(pi, data, data_len, playout) == FALSE) {
/* There is no data to get */
return FALSE;
}
/* Check we are not attempting to remove
* data that another iterator is pointing to
*/
iterators = &pi->buffer->iterators[0];
n_iterators = pi->buffer->n_iterators;
for(i = 0; i < n_iterators; i++) {
if (iterators[i].node == pi->node && iterators + i != pi) {
debug_msg("Eek removing node that another iterator is using...danger!\n");
iterators[i].node = iterators[i].node->prev;
}
}
/* Relink list of nodes */
curr_node = pi->node;
next_node = curr_node->next;
curr_node->next->prev = curr_node->prev;
curr_node->prev->next = curr_node->next;
#ifdef DEBUG
curr_node->next = NULL;
curr_node->prev = NULL;
curr_node->magic = 0;
curr_node->data = NULL;
curr_node->data_len = 0;
#endif
block_free(curr_node, sizeof(pb_node_t));
pi->node = next_node;
pi->buffer->n_nodes--;
pb_validate(pi->buffer);
return TRUE;
}
int
vanilla_decoder_decode(u_char *state,
struct s_pb *in,
struct s_pb *out,
timestamp_t now)
{
struct s_pb_iterator *pi;
channel_unit *cu;
u_char *c_get;
channel_data *c;
uint32_t clen;
timestamp_t playout;
assert(state == NULL); /* No decoder state needed */
UNUSED(state);
pb_iterator_create(in, &pi);
assert(pi != NULL);
while(pb_iterator_get_at(pi, &c_get, &clen, &playout)) {
c = (channel_data*)c_get;
assert(c != NULL);
assert(clen == sizeof(channel_data));
if (ts_gt(playout, now)) {
/* Playout point of unit is after now. Stop! */
break;
}
pb_iterator_detach_at(pi, &c_get, &clen, &playout);
c = (channel_data*)c_get;
assert(c != NULL);
assert(c->nelem == 1);
cu = c->elem[0];
vanilla_decoder_output(cu, out, playout);
channel_data_destroy(&c, sizeof(channel_data));
}
pb_iterator_destroy(in, &pi);
return TRUE;
}
