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si-adapter: add a config option to specify the preferred number of channels

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This is mostly useful when using the adapter with audiotestsrc,
which supports an infinite number of channels. By specifying
a preference, we can limit it to the number of channels that we want.
This commit is contained in:
George Kiagiadakis 2020-05-11 11:34:20 +03:00
parent e8e6c1d8bc
commit 6537332984
1 changed files with 13 additions and 1 deletions
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14
modules/module-si-adapter.c
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@ -33,6 +33,7 @@ struct _WpSiAdapter
gchar media_class[32];
gchar role[32];
guint priority;
guint preferred_n_channels;
gboolean control_port;
gboolean monitor;
WpDirection direction;
@ -95,6 +96,8 @@ si_adapter_get_configuration (WpSessionItem * item)
"role", g_variant_new_string (self->role));
g_variant_builder_add (&b, "{sv}",
"priority", g_variant_new_uint32 (self->priority));
g_variant_builder_add (&b, "{sv}",
"preferred-n-channels", g_variant_new_uint32 (self->preferred_n_channels));
g_variant_builder_add (&b, "{sv}",
"enable-control-port", g_variant_new_boolean (self->control_port));
g_variant_builder_add (&b, "{sv}",
@ -126,6 +129,7 @@ si_adapter_configure (WpSessionItem * item, GVariant * args)
self->control_port = FALSE;
self->monitor = FALSE;
self->direction = WP_DIRECTION_INPUT;
self->preferred_n_channels = 0;
if (!g_variant_lookup (args, "node", "t", &node_i))
return FALSE;
@ -166,6 +170,7 @@ si_adapter_configure (WpSessionItem * item, GVariant * args)
self->direction = WP_DIRECTION_OUTPUT;
g_variant_lookup (args, "priority", "u", &self->priority);
g_variant_lookup (args, "preferred-n-channels", "u", &self->preferred_n_channels);
g_variant_lookup (args, "enable-control-port", "b", &self->control_port);
g_variant_lookup (args, "enable-monitor", "b", &self->monitor);
@ -200,6 +205,7 @@ on_node_enum_format_done (WpProxy *proxy, GAsyncResult *res,
WpSiAdapter *self = wp_transition_get_source_object (transition);
g_autoptr (GPtrArray) formats = NULL;
g_autoptr (GError) error = NULL;
gint pref_chan;
formats = wp_proxy_enum_params_collect_finish (proxy, res, &error);
if (error) {
@ -207,7 +213,11 @@ on_node_enum_format_done (WpProxy *proxy, GAsyncResult *res,
return;
}
if (!choose_sensible_raw_audio_format (formats, 34, &self->format)) {
/* 34 is the max number of channels that SPA knows about
in the spa_audio_channel enum */
pref_chan = self->preferred_n_channels ? self->preferred_n_channels : 34;
if (!choose_sensible_raw_audio_format (formats, pref_chan, &self->format)) {
wp_warning_object (self, "failed to choose a sensible audio format");
wp_transition_return_error (transition,
g_error_new (WP_DOMAIN_LIBRARY, WP_LIBRARY_ERROR_OPERATION_FAILED,
@ -532,6 +542,8 @@ wireplumber__module_init (WpModule * module, WpCore * core, GVariant * args)
WP_SI_CONFIG_OPTION_WRITEABLE, NULL);
g_variant_builder_add (&b, "(ssymv)", "priority", "u",
WP_SI_CONFIG_OPTION_WRITEABLE, NULL);
g_variant_builder_add (&b, "(ssymv)", "preferred-n-channels", "u",
WP_SI_CONFIG_OPTION_WRITEABLE, NULL);
g_variant_builder_add (&b, "(ssymv)", "enable-control-port", "b",
WP_SI_CONFIG_OPTION_WRITEABLE, NULL);
g_variant_builder_add (&b, "(ssymv)", "enable-monitor", "b",