link: fix param enumeration

When the input port param enumeration has no result, use the NULL
filter to still enumerate the output port parameters instead of
returning nothing.
Fix the offset in the gst element.

2 files changed, 13 insertions, 3 deletions

diff --git a/src/gst/gstpipewiresrc.c b/src/gst/gstpipewiresrc.c
index f65878b6..16f74848 100644
--- a/src/gst/gstpipewiresrc.c
+++ b/src/gst/gstpipewiresrc.c
@@ -467,6 +467,7 @@ on_new_buffer (void *_data,
     GstMemory *mem = gst_buffer_peek_memory (buf, i);
     mem->offset = SPA_MIN(d->chunk->offset, d->maxsize);
     mem->size = SPA_MIN(d->chunk->size, d->maxsize - mem->offset);
+    mem->offset += data->offset;
   }
 
   if (pwsrc->always_copy)
diff --git a/src/pipewire/link.c b/src/pipewire/link.c
index 1f7b7802..0843089a 100644
--- a/src/pipewire/link.c
+++ b/src/pipewire/link.c
@@ -464,15 +464,22 @@ param_filter(struct pw_link *this,
         struct spa_pod_builder ib = { 0 };
 	struct spa_pod *oparam, *iparam;
 	uint32_t iidx, oidx, num = 0;
+	int res;
 
 	for (iidx = 0;;) {
 	        spa_pod_builder_init(&ib, ibuf, sizeof(ibuf));
 		pw_log_debug("iparam %d", iidx);
-		if (spa_node_port_enum_params(in_port->node->node, in_port->direction, in_port->port_id,
-					      id, &iidx, NULL, &iparam, &ib) <= 0)
+		if ((res = spa_node_port_enum_params(in_port->node->node,
+						     in_port->direction, in_port->port_id,
+						     id, &iidx, NULL, &iparam, &ib)) < 0)
 			break;
 
-		if (pw_log_level_enabled(SPA_LOG_LEVEL_DEBUG))
+		if (res == 0 && num > 0)
+			break;
+		else
+			iparam = NULL;
+
+		if (pw_log_level_enabled(SPA_LOG_LEVEL_DEBUG) && iparam != NULL)
 			spa_debug_pod(iparam, 0);
 
 		for (oidx = 0;;) {
@@ -488,6 +495,8 @@ param_filter(struct pw_link *this,
 
 			num++;
 		}
+		if (iparam == NULL && num == 0)
+			break;
 	}
 	return num;
 }