impl-port: pass the zeroramp.duration to the mixer

Pass the zeroramp.duration property from the node to the port and then
to the mixer so that it can be configured.

Add the zeroramp.duration to the docs.

doc/dox/config/pipewire-client.conf.5.md

@@ -87,6 +87,7 @@ stream.properties = {
     #dither.noise = 0
     #dither.method = none # rectangular, triangular, triangular-hf, wannamaker3, shaped5
     #debug.wav-path = ""
+    #zeroramp.duration = 0.005
 }
 ```
 

doc/dox/config/pipewire-props.7.md

@@ -842,6 +842,9 @@ Dithering is only useful for conversion to a format with less than 24 bits and w
 disabled otherwise.
 \endparblock
 
+@PAR@ node-prop  zeroramp.duration = 0.005
+The duration of fade-in and fade-out of the signal in seconds on silence gaps.
+
 ## Debug Parameters  @IDX@ props
 
 @PAR@ node-prop  debug.wav-path = ""

doc/dox/config/pipewire-pulse.conf.5.md

@@ -100,6 +100,7 @@ stream.properties = {
     #dither.noise = 0
     #dither.method = none # rectangular, triangular, triangular-hf, wannamaker3, shaped5
     #debug.wav-path = ""
+    #zeroramp.duration = 0.005
 }
 ```
 

src/daemon/client.conf.in

@@ -112,6 +112,7 @@ stream.properties = {
     #channelmix.stereo-widen = 0.0
     #channelmix.hilbert-taps = 0
     #dither.noise            = 0
+    #zeroramp.duration       = 0.005
 }
 
 stream.rules = [

src/daemon/minimal.conf.in

@@ -361,6 +361,7 @@ context.objects = [
             #channelmix.hilbert-taps = 0
             #channelmix.disable     = false
             #dither.noise = 0
+            #zeroramp.duration      = 0.005
             #node.param.Props       = {
             #    params = [
             #        audio.channels 6
@@ -427,6 +428,7 @@ context.objects = [
             #channelmix.hilbert-taps = 0
             #channelmix.disable     = false
             #dither.noise = 0
+            #zeroramp.duration      = 0.005
             #node.param.Props       = {
             #    params = [
             #        audio.format  S16

src/daemon/pipewire-pulse.conf.in

@@ -110,6 +110,7 @@ stream.properties = {
     #channelmix.lfe-level      = 0.5
     #channelmix.hilbert-taps = 0
     #dither.noise            = 0
+    #zeroramp.duration       = 0.005
 }
 
 pulse.properties = {

src/pipewire/impl-port.c

@@ -543,6 +543,10 @@ static int check_properties(struct pw_impl_port *port)
 	} else {
 		port->passive_mode = passive_mode_from_string(str);
 	}
+	if ((str = pw_properties_get(port->properties, "zeroramp.duration")) == NULL) {
+		if ((str = pw_properties_get(node->properties, "zeroramp.duration")) != NULL)
+			pw_properties_set(port->properties, "zeroramp.duration", str);
+	}
 
 	if (media_class != NULL &&
 	    (strstr(media_class, "Sink") != NULL ||
@@ -1093,7 +1097,7 @@ static int setup_mixer(struct pw_impl_port *port, const struct spa_pod *param)
 	int res;
 	const char *fallback_lib, *factory_name, *str;
 	struct spa_handle *handle;
-	struct spa_dict_item items[4];
+	struct spa_dict_item items[5];
 	char quantum_limit[16];
 	void *iface;
 	struct pw_context *context = port->node->context;
@@ -1153,6 +1157,8 @@ static int setup_mixer(struct pw_impl_port *port, const struct spa_pod *param)
 	items[n_items++] = SPA_DICT_ITEM_INIT(PW_KEY_NODE_LOOP_NAME, port->node->data_loop->name);
 	if ((str = pw_properties_get(port->properties, "control.ump")) != NULL)
 		items[n_items++] = SPA_DICT_ITEM_INIT("control.ump", str);
+	if ((str = pw_properties_get(port->properties, "zeroramp.duration")) != NULL)
+		items[n_items++] = SPA_DICT_ITEM_INIT("zeroramp.duration", str);
 
 	handle = pw_context_load_spa_handle(context, factory_name,
 			&SPA_DICT_INIT(items, n_items));