1 files changed, 159 insertions, 4 deletions
diff --git a/libmatemixer/matemixer-backend.c b/libmatemixer/matemixer-backend.c
index 890c34b..474edd4 100644
--- a/libmatemixer/matemixer-backend.c
+++ b/libmatemixer/matemixer-backend.c
@@ -19,15 +19,121 @@
 #include <glib-object.h>
 
 #include "matemixer-backend.h"
+#include "matemixer-enums.h"
+#include "matemixer-enum-types.h"
 #include "matemixer-stream.h"
 
+enum {
+ DEVICE_ADDED,
+ DEVICE_CHANGED,
+ DEVICE_REMOVED,
+ STREAM_ADDED,
+ STREAM_CHANGED,
+ STREAM_REMOVED,
+ N_SIGNALS
+};
+
+static guint signals[N_SIGNALS] = { 0, };
+
 G_DEFINE_INTERFACE (MateMixerBackend, mate_mixer_backend, G_TYPE_OBJECT)
 
 static void
 mate_mixer_backend_default_init (MateMixerBackendInterface *iface)
 {
+ g_object_interface_install_property (iface,
+ g_param_spec_enum ("state",
+ "State",
+ "Backend connection state",
+ MATE_MIXER_TYPE_STATE,
+ MATE_MIXER_STATE_IDLE,
+ G_PARAM_READABLE |
+ G_PARAM_STATIC_STRINGS));
+
+ signals[DEVICE_ADDED] = g_signal_new ("device-added",
+ G_TYPE_FROM_INTERFACE (iface),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (MateMixerBackendInterface, device_added),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_STRING);
+
+ signals[DEVICE_CHANGED] = g_signal_new ("device-changed",
+ G_TYPE_FROM_INTERFACE (iface),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (MateMixerBackendInterface, device_changed),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_STRING);
+
+ signals[DEVICE_REMOVED] = g_signal_new ("device-removed",
+ G_TYPE_FROM_INTERFACE (iface),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (MateMixerBackendInterface, device_removed),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_STRING);
+
+ signals[STREAM_ADDED] = g_signal_new ("stream-added",
+ G_TYPE_FROM_INTERFACE (iface),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (MateMixerBackendInterface, stream_added),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_STRING);
+
+ signals[STREAM_CHANGED] = g_signal_new ("stream-changed",
+ G_TYPE_FROM_INTERFACE (iface),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (MateMixerBackendInterface, stream_changed),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_STRING);
+
+ signals[STREAM_REMOVED] = g_signal_new ("stream-removed",
+ G_TYPE_FROM_INTERFACE (iface),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (MateMixerBackendInterface, stream_removed),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_STRING);
+}
+
+void
+mate_mixer_backend_set_data (MateMixerBackend *backend, const MateMixerBackendData *data)
+{
+ MateMixerBackendInterface *iface;
+
+ g_return_if_fail (MATE_MIXER_IS_BACKEND (backend));
+
+ iface = MATE_MIXER_BACKEND_GET_INTERFACE (backend);
+
+ if (iface->set_data)
+ iface->set_data (backend, data);
 }
 
+/*
+ * Required behaviour:
+ * if the function returns TRUE, the state must be either MATE_MIXER_STATE_READY or
+ * MATE_MIXER_STATE_CONNECTING.
+ */
 gboolean
 mate_mixer_backend_open (MateMixerBackend *backend)
 {
@@ -37,10 +143,11 @@ mate_mixer_backend_open (MateMixerBackend *backend)
 
 iface = MATE_MIXER_BACKEND_GET_INTERFACE (backend);
 
- if (iface->open)
- return iface->open (backend);
-
- return FALSE;
+ if (!iface->open) {
+ g_critical ("Backend module does not implement the open() method");
+ return FALSE;
+ }
+ return iface->open (backend);
 }
 
 void
@@ -56,6 +163,22 @@ mate_mixer_backend_close (MateMixerBackend *backend)
 iface->close (backend);
 }
 
+MateMixerState
+mate_mixer_backend_get_state (MateMixerBackend *backend)
+{
+ MateMixerBackendInterface *iface;
+
+ g_return_val_if_fail (MATE_MIXER_IS_BACKEND (backend), MATE_MIXER_STATE_UNKNOWN);
+
+ iface = MATE_MIXER_BACKEND_GET_INTERFACE (backend);
+
+ if (!iface->get_state) {
+ g_critical ("Backend module does not implement the get_state() method");
+ return MATE_MIXER_STATE_UNKNOWN;
+ }
+ return iface->get_state (backend);
+}
+
 GList *
 mate_mixer_backend_list_devices (MateMixerBackend *backend)
 {
@@ -101,6 +224,22 @@ mate_mixer_backend_get_default_input_stream (MateMixerBackend *backend)
 return NULL;
 }
 
+gboolean
+mate_mixer_backend_set_default_input_stream (MateMixerBackend *backend,
+ MateMixerStream *stream)
+{
+ MateMixerBackendInterface *iface;
+
+ g_return_val_if_fail (MATE_MIXER_IS_BACKEND (backend), FALSE);
+
+ iface = MATE_MIXER_BACKEND_GET_INTERFACE (backend);
+
+ if (iface->set_default_input_stream)
+ return iface->set_default_input_stream (backend, stream);
+
+ return FALSE;
+}
+
 MateMixerStream *
 mate_mixer_backend_get_default_output_stream (MateMixerBackend *backend)
 {
@@ -115,3 +254,19 @@ mate_mixer_backend_get_default_output_stream (MateMixerBackend *backend)
 
 return NULL;
 }
+
+gboolean
+mate_mixer_backend_set_default_output_stream (MateMixerBackend *backend,
+ MateMixerStream *stream)
+{
+ MateMixerBackendInterface *iface;
+
+ g_return_val_if_fail (MATE_MIXER_IS_BACKEND (backend), FALSE);
+
+ iface = MATE_MIXER_BACKEND_GET_INTERFACE (backend);
+
+ if (iface->set_default_output_stream)
+ return iface->set_default_output_stream (backend, stream);
+
+ return FALSE;
+}