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jack: fix loopback links to client

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When a client produces output on a port and there is a link between the
output port and an input port of the client, make sure that the new
data appears on the input port.

We do this by keeping track of what links are between our ports and when
we get the peer id of a port input, we can related this to our port
again. Some mixer inputs will then fetch content from our own ports and
so we can prepare the output for them. This can be converting midi to
control messages or moving the output buffer id to the io area so that
the input mixer can pick up the new buffer.

Fixes #1839
This commit is contained in:
Wim Taymans 2021-12-07 15:27:18 +01:00
parent 35cec1cf23
commit 19b53e8dbe
1 changed files with 51 additions and 24 deletions
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75
pipewire-jack/src/pipewire-jack.c
View file

@ -139,6 +139,8 @@ struct object {
bool is_complete;
uint32_t src_idx;
uint32_t dst_idx;
struct port *our_input;
struct port *our_output;
} port_link;
struct {
unsigned long flags;
@ -205,6 +207,7 @@ struct mix {
uint32_t id;
uint32_t peer_id;
struct port *port;
struct port *peer_port;
struct spa_io_buffers *io;
@ -998,8 +1001,8 @@ static inline void *get_buffer_output(struct port *p, uint32_t frames, uint32_t
if (SPA_UNLIKELY((mix = p->global_mix) == NULL))
return NULL;
pw_log_trace_fp("%p: port %p %d get buffer %d n_buffers:%d",
c, p, p->id, frames, mix->n_buffers);
pw_log_trace_fp("%p: port %s %d get buffer %d n_buffers:%d",
c, p->object->port.name, p->id, frames, mix->n_buffers);
if (SPA_UNLIKELY(mix->n_buffers == 0))
return NULL;
@ -1057,6 +1060,19 @@ static inline void process_empty(struct port *p, uint32_t frames)
}
}
static void prepare_output(struct port *p, uint32_t frames)
{
struct mix *mix;
if (SPA_UNLIKELY(p->empty_out))
process_empty(p, frames);
spa_list_for_each(mix, &p->mix, port_link) {
if (SPA_LIKELY(mix->io != NULL))
*mix->io = p->io;
}
}
static void complete_process(struct client *c, uint32_t frames)
{
struct port *p;
@ -1069,13 +1085,7 @@ static void complete_process(struct client *c, uint32_t frames)
}
}
spa_list_for_each(p, &c->ports[SPA_DIRECTION_OUTPUT], link) {
if (SPA_UNLIKELY(p->empty_out))
process_empty(p, frames);
spa_list_for_each(mix, &p->mix, port_link) {
if (SPA_LIKELY(mix->io != NULL))
*mix->io = p->io;
}
prepare_output(p, frames);
p->io.status = SPA_STATUS_NEED_DATA;
}
}
@ -2386,15 +2396,25 @@ static int client_node_port_set_mix_info(void *object,
dst = peer_id;
}
if ((l = find_link(c, src, dst)) != NULL && !l->port_link.is_complete) {
l->port_link.is_complete = true;
pw_log_info("%p: our link %d/%u -> %d/%u completed", c,
l->port_link.src, l->port_link.src_idx,
l->port_link.dst, l->port_link.dst_idx);
do_callback(c, connect_callback,
l->port_link.src_idx, l->port_link.dst_idx, 1, c->connect_arg);
recompute_latencies(c);
do_callback(c, graph_callback, c->graph_arg);
if ((l = find_link(c, src, dst)) != NULL) {
if (direction == SPA_DIRECTION_INPUT)
mix->peer_port = l->port_link.our_output;
else
mix->peer_port = l->port_link.our_input;
pw_log_info("peer port %p %p %p", mix->peer_port,
l->port_link.our_output, l->port_link.our_input);
if (!l->port_link.is_complete) {
l->port_link.is_complete = true;
pw_log_info("%p: our link %d/%u -> %d/%u completed", c,
l->port_link.src, l->port_link.src_idx,
l->port_link.dst, l->port_link.dst_idx);
do_callback(c, connect_callback,
l->port_link.src_idx, l->port_link.dst_idx, 1, c->connect_arg);
recompute_latencies(c);
do_callback(c, graph_callback, c->graph_arg);
}
}
exit:
@ -2816,6 +2836,8 @@ static void registry_event_global(void *data, uint32_t id,
o->port_link.src_ours = p->port.port != NULL &&
p->port.port->client == c;
if (o->port_link.src_ours)
o->port_link.our_output = p->port.port;
if ((str = spa_dict_lookup(props, PW_KEY_LINK_INPUT_PORT)) == NULL)
goto exit_free;
@ -2827,6 +2849,8 @@ static void registry_event_global(void *data, uint32_t id,
o->port_link.dst_idx = p->idx;
o->port_link.dst_ours = p->port.port != NULL &&
p->port.port->client == c;
if (o->port_link.dst_ours)
o->port_link.our_input = p->port.port;
o->port_link.is_complete = !o->port_link.src_ours && !o->port_link.dst_ours;
pw_log_debug("%p: add link %d %d->%d", c, id,
@ -4156,10 +4180,13 @@ done:
return res;
}
static struct buffer *get_mix_buffer(struct mix *mix)
static struct buffer *get_mix_buffer(struct mix *mix, jack_nframes_t frames)
{
struct spa_io_buffers *io;
if (mix->peer_port != NULL)
prepare_output(mix->peer_port, frames);
io = mix->io;
if (io == NULL ||
io->status != SPA_STATUS_HAVE_DATA ||
@ -4181,10 +4208,10 @@ static void *get_buffer_input_float(struct port *p, jack_nframes_t frames)
uint32_t offset, size;
void *np;
pw_log_trace_fp("%p: port %p mix %d.%d get buffer %d",
p->client, p, p->id, mix->id, frames);
pw_log_trace_fp("%p: port %s mix %d.%d get buffer %d",
p->client, p->object->port.name, p->id, mix->id, frames);
if ((b = get_mix_buffer(mix)) == NULL)
if ((b = get_mix_buffer(mix, frames)) == NULL)
continue;
d = &b->datas[0];
@ -4224,7 +4251,7 @@ static void *get_buffer_input_midi(struct port *p, jack_nframes_t frames)
pw_log_trace_fp("%p: port %p mix %d.%d get buffer %d",
p->client, p, p->id, mix->id, frames);
if ((b = get_mix_buffer(mix)) == NULL)
if ((b = get_mix_buffer(mix, frames)) == NULL)
continue;
d = &b->datas[0];
@ -4291,7 +4318,7 @@ void * jack_port_get_buffer (jack_port_t *port, jack_nframes_t frames)
pw_log_trace("peer mix: %p %d", mix, mix->peer_id);
if ((b = get_mix_buffer(mix)) == NULL)
if ((b = get_mix_buffer(mix, frames)) == NULL)
return NULL;
d = &b->datas[0];