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jack: handle plugins that cache jack_port_get_buffer()

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Some plugins (calfjackhost) only call jack_port_get_buffer()
once and cache the pointer. This behaviour has been deprecated
in JACK2 but still works.

Add a workaround for this by getting a buffer ourselves and memcpy
into it from the scratch buffer.
This commit is contained in:
Wim Taymans 2020-01-29 10:29:26 +01:00
parent 84258c9078
commit 8de267cf02
1 changed files with 31 additions and 10 deletions
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37
pipewire-jack/src/pipewire-jack.c
View file

@ -195,7 +195,9 @@ struct port {
struct spa_io_buffers io;
struct spa_list mix;
bool zeroed;
unsigned int empty_out:1;
unsigned int zeroed:1;
float *emptyptr;
float empty[MAX_BUFFER_FRAMES + MAX_ALIGN];
};
@ -749,16 +751,31 @@ done:
return ptr;
}
static void process_tee(struct client *c)
static void process_tee(struct client *c, uint32_t frames)
{
struct port *p;
spa_list_for_each(p, &c->ports[SPA_DIRECTION_OUTPUT], link) {
if (p->object->port.type_id != 1)
void *ptr;
if (!p->empty_out)
continue;
void *ptr = get_buffer_output(c, p, MAX_BUFFER_FRAMES, 1);
switch (p->object->port.type_id) {
case 0:
ptr = get_buffer_output(c, p, frames, sizeof(float));
if (ptr != NULL)
memcpy(ptr, p->emptyptr, frames * sizeof(float));
break;
case 1:
ptr = get_buffer_output(c, p, MAX_BUFFER_FRAMES, 1);
if (ptr != NULL)
convert_from_midi(p->emptyptr, ptr, MAX_BUFFER_FRAMES * sizeof(float));
break;
default:
pw_log_warn("port %p: unhandled format", p);
break;
}
}
}
@ -973,7 +990,7 @@ static inline void signal_sync(struct client *c)
struct link *l;
struct pw_node_activation *activation = c->activation;
process_tee(c);
process_tee(c, c->buffer_frames);
clock_gettime(CLOCK_MONOTONIC, &ts);
nsec = SPA_TIMESPEC_TO_NSEC(&ts);
@ -2909,14 +2926,18 @@ static inline void *get_buffer_output_float(struct client *c, struct port *p, ja
void *ptr;
ptr = get_buffer_output(c, p, frames, sizeof(float));
if (ptr == NULL)
if (ptr == NULL) {
p->empty_out = true;
ptr = p->emptyptr;
} else {
p->empty_out = false;
}
return ptr;
}
static inline void *get_buffer_output_midi(struct client *c, struct port *p, jack_nframes_t frames)
{
p->empty_out = true;
return p->emptyptr;
}
@ -2972,7 +2993,7 @@ void * jack_port_get_buffer (jack_port_t *port, jack_nframes_t frames)
}
}
pw_log_trace(NAME" %p: port %p buffer %p", c, p, ptr);
pw_log_trace(NAME" %p: port %p buffer %p empty:%u", c, p, ptr, p->empty_out);
return ptr;
}