Merge "bluealsa plugin: monitor the state of service via dbus" into guppyguppy_7.0.1guppy_7.0.0guppy_6.99.5guppy/7.0.1guppy/7.0.0guppy/6.99.57.0.17.0.06.99.5

3 files changed, 216 insertions, 28 deletions

diff --git a/plugins/lib/bluealsa/hal-bluealsa-transports.c b/plugins/lib/bluealsa/hal-bluealsa-transports.c
index 56e1a29..590ab5d 100644
--- a/plugins/lib/bluealsa/hal-bluealsa-transports.c
+++ b/plugins/lib/bluealsa/hal-bluealsa-transports.c
@@ -74,6 +74,7 @@ bool halBlueAlsaTransportFind(
 }
 
 
+
 int halBlueAlsaTransportUpdate(
 	const bluealsa_watch * watch,
 	bluealsa_transport_t * list,
@@ -129,7 +130,8 @@ static bool halBlueAlsaTransportMatch(const struct ba_msg_transport * transport1
 	if (transport1->type != transport2->type)
 		goto done;
 
-	if (transport1->stream != transport2->stream)
+	/* with HFP/ofono, a NULL codec means a hangup. So we consider that the transport has disappeared in that case */
+	if (transport1->codec != transport2->codec)
 		goto done;
 
 	if (bacmp(&transport1->addr, &transport2->addr) != 0) {
@@ -146,8 +148,8 @@ char * halBlueAlsaTransportAsString(char * buff, size_t len, const struct ba_msg
 
 	ba2str(&transport->addr, addr);
 	snprintf(buff, len, "%s,%s,%s", addr,
-			transport->type == BA_PCM_TYPE_A2DP?"a2dp":"sco",
-			transport->stream == BA_PCM_STREAM_PLAYBACK?"playback":"capture");
+			transport->type & BA_PCM_TYPE_A2DP?"a2dp":"sco",
+			transport->type & BA_PCM_STREAM_PLAYBACK?"playback":"capture");
 
 	return buff;
 }
diff --git a/plugins/lib/bluealsa/hal-bluealsa-transports.h b/plugins/lib/bluealsa/hal-bluealsa-transports.h
index d5b277f..0c75f1d 100644
--- a/plugins/lib/bluealsa/hal-bluealsa-transports.h
+++ b/plugins/lib/bluealsa/hal-bluealsa-transports.h
@@ -26,8 +26,8 @@
 #include "hal-bluealsa-watch.h"
 
 typedef struct {
-	const bluealsa_watch *	watch;	/* owner */
 	struct cds_list_head	list;
+	const bluealsa_watch *	watch;	/* owner */
 	struct ba_msg_transport transport;
 	char * 					transactionUidS;
 } bluealsa_transport_t;
diff --git a/plugins/lib/bluealsa/hal-bluealsa.c b/plugins/lib/bluealsa/hal-bluealsa.c
index b2d4537..10a61ae 100644
--- a/plugins/lib/bluealsa/hal-bluealsa.c
+++ b/plugins/lib/bluealsa/hal-bluealsa.c
@@ -25,6 +25,8 @@
 #include <ctl-config.h>
 #include <systemd/sd-event.h>
 #include <bluealsa/bluealsa.h>
+#include <systemd/sd-bus.h>
+#include <urcu/list.h>
 
 #include "hal-bluealsa.h"
 
@@ -36,6 +38,12 @@
 #define SCO_TALK_ZONE "sco_talk_zone"
 #define SCO_CHANNEL_MONO "sco-mono"
 
+#define ORG_FREEDESKTOP_DBUS_NAME "org.freedesktop.DBus"
+#define ORG_FREEDESKTOP_DBUS_PATH "/org/freedesktop/DBus"
+#define ORG_FREEDESKTOP_DBUS_INTERFACE ORG_FREEDESKTOP_DBUS_NAME
+
+#define BLUEZALSA_DBUS_NAME_PREFIX "org.bluez-alsa"
+
 /* forward static declarations */
 static int halBlueAlsaTransportEventCB(sd_event_source* src, int fd, uint32_t revents, void* userData);
 static int halBlueAlsaFetchTransports(bluealsa_watch * plugin);
@@ -171,7 +179,7 @@ static int halBlueAlsaTransportEventCB(sd_event_source* src, int fd, uint32_t re
 	struct ba_msg_event event;
 	ssize_t ret;
 
-	AFB_API_DEBUG(plugin->api, "--- %s ----!", __func__);
+	AFB_API_DEBUG(plugin->api, "------ %s ------!", __func__);
 
 	if ((revents & EPOLLIN) == 0)
 		goto done;
@@ -179,8 +187,6 @@ static int halBlueAlsaTransportEventCB(sd_event_source* src, int fd, uint32_t re
 	if (revents & EPOLLHUP) {
 		AFB_API_INFO(plugin->api, "Lost connection with bluealsa on interface %s", watch->interface);
 		sd_event_source_unref(src);
-		close(fd);
-		halBlueAlsaRegister(plugin, watch->interface);
 		goto done;
 	}
 
@@ -450,12 +456,12 @@ static int halBlueAlsaAttachTransportStreams(bluealsa_transport_t * transport) {
 	char * playbackZoneS;
 	uint32_t delayms;
 
-	if (ba_transport->type == BA_PCM_TYPE_SCO) {
+	if (ba_transport->type & BA_PCM_TYPE_SCO) {
 		transportTypeS = "sco";
 		delayms = pluginData->sco.delayms;
 		playbackZoneS = pluginData->sco.speaker;
 	}
-	else if (ba_transport->type == BA_PCM_TYPE_A2DP) {
+	else if (ba_transport->type & BA_PCM_TYPE_A2DP) {
 		transportTypeS = "a2dp";
 		delayms = pluginData->a2dp.delayms;
 		playbackZoneS = pluginData->a2dp.zone;
@@ -491,14 +497,14 @@ static int halBlueAlsaAttachTransportStreams(bluealsa_transport_t * transport) {
 	pcmplugParamsJ = halBlueAlsaPcmPlugParams(watch->interface, addr, transportTypeS);
 
 	sourceJ = json_object_new_object();
-	if (ba_transport->type == BA_PCM_TYPE_A2DP)
+	if (ba_transport->type & BA_PCM_TYPE_A2DP)
 		json_object_object_add(sourceJ, "channels", halBlueAlsaA2DPTransportChannels(transportTypeS));
 	else
 		json_object_object_add(sourceJ, "channels", halBlueAlsaSCOTransportChannels(transportTypeS));
 
 	json_object_object_add(requestJ, "captures", halBlueAlsaListenCapture(captureS, pcmplugParamsJ, sourceJ));
 
-	if (ba_transport->type == BA_PCM_TYPE_SCO) {
+	if (ba_transport->type & BA_PCM_TYPE_SCO) {
 		playbackJ = json_object_new_object();
 		// that is a shame that deep copy in not available in the current json-c version
 		pcmplugParamsJ2 = halBlueAlsaPcmPlugParams(watch->interface, addr, transportTypeS);
@@ -511,7 +517,7 @@ static int halBlueAlsaAttachTransportStreams(bluealsa_transport_t * transport) {
 
 	/* ZONES */
 
-	if (ba_transport->type == BA_PCM_TYPE_SCO) {
+	if (ba_transport->type & BA_PCM_TYPE_SCO) {
 		zonesJ = json_object_new_array();
 		json_object_array_add(zonesJ, halBlueAlsaScoZone());
 		json_object_object_add(requestJ, "zones", zonesJ);
@@ -536,7 +542,7 @@ static int halBlueAlsaAttachTransportStreams(bluealsa_transport_t * transport) {
 	json_object_array_add(streamsJ, streamJ);
 
 	/* In case of SCO, to have full-duplex, we instantiate a stream for talk */
-	if (ba_transport->type == BA_PCM_TYPE_SCO ) {
+	if (ba_transport->type & BA_PCM_TYPE_SCO ) {
 
 		streamJ = json_object_new_object();
 		if (asprintf(&streamS, "%s_talk_stream", transportTypeS) == -1)
@@ -617,14 +623,20 @@ static int halBlueAlsaFetchTransports(bluealsa_watch * watch) {
 		struct ba_msg_transport * ba_transport = &transports[ix];
 		ba2str(&ba_transport->addr, addr);
 		const char * typeS;
-		if (ba_transport->type == BA_PCM_TYPE_SCO)
+		if (ba_transport->type & BA_PCM_TYPE_SCO)
 			typeS = "sco";
-		else if (ba_transport->type == BA_PCM_TYPE_A2DP)
+		else if (ba_transport->type & BA_PCM_TYPE_A2DP)
 			typeS = "a2dp";
 		else
 			typeS = "unknown";
 
-		AFB_API_DEBUG(plugin->api, "Transport %d: type %s, dev %s", ix, typeS, addr);
+		AFB_API_DEBUG(plugin->api, "Transport %d: type %s (%x), dev %s", ix, typeS, ba_transport->type, addr);
+
+		if (BA_PCM_TYPE(ba_transport->type) == BA_PCM_TYPE_SCO &&
+			ba_transport->codec == 0) {
+			AFB_API_DEBUG(plugin->api, "Transport has no codec, skip it");
+			continue;
+		}
 
 		if (halBlueAlsaTransportFind(watch, transport_list, ba_transport)) {
 			AFB_API_DEBUG(plugin->api, "This transport is already streamed");
@@ -655,23 +667,67 @@ done:
 	return 0;
 }
 
-static int halBlueAlsaRegister(CtlPluginT* plugin, const char * interface) {
+
+static int halBlueAlsaUnregister(CtlPluginT * plugin, const char * dbus_name) {
+	hal_bluealsa_plugin_data_t * pluginData = getPluginContext(plugin);
+
+	const char * interface = dbus_name + strlen(BLUEZALSA_DBUS_NAME_PREFIX) + 1;
+
+	bluealsa_transport_t * transport_list = &pluginData->transport_list;
+
+	const bluealsa_watch * watcher = NULL;
+
+	bluealsa_transport_t * tmp, *sav;
+	cds_list_for_each_entry_safe(tmp, sav, &transport_list->list, list) {
+
+		const bluealsa_watch * watch = tmp->watch;
+		if (!watch)
+			continue;
+
+		if (strcmp(watch->interface, interface) != 0)
+			continue;
+
+		watcher = watch;
+
+		cds_list_del(&tmp->list);
+		halBluezAlsaRemoveTransportStream(tmp);
+
+		free(tmp->transactionUidS);
+		free(tmp);
+	}
+
+	if (watcher) {
+		close(watcher->fd);
+		free((char*)watcher->interface);
+		free((bluealsa_watch*)watcher);
+	}
+
+	return 0;
+}
+
+static int halBlueAlsaRegister(CtlPluginT* plugin, const char * dbus_name) {
 	int ret;
-    sd_event *sdLoop;
-    sd_event_source* evtsrc;
+    sd_event * sdLoop;
+    sd_event_source * evtsrc;
+
+    const char * interface = dbus_name + strlen(BLUEZALSA_DBUS_NAME_PREFIX) +1 ;
 
     sdLoop = afb_api_get_event_loop(plugin->api);
 
     enum ba_event transport_mask = BA_EVENT_TRANSPORT_ADDED |
-//    							   BA_EVENT_TRANSPORT_CHANGED |
+								   BA_EVENT_TRANSPORT_CHANGED |
 								   BA_EVENT_TRANSPORT_REMOVED;
 
     bluealsa_watch * watch = (bluealsa_watch *)malloc(sizeof(bluealsa_watch));
     if (watch == NULL)
     	goto fail;
 
-    watch->interface = interface;
-    watch->plugin    = plugin;
+    watch->interface = strdup(interface);
+    if (!watch->interface) {
+    	AFB_API_ERROR(plugin->api, "%s: Insufficient memory", __func__);
+		goto fail;
+	}
+    watch->plugin = plugin;
 
     if ((watch->fd = bluealsa_open(interface)) == -1) {
         AFB_API_ERROR(plugin->api, "BlueALSA connection failed: %s", strerror(errno));
@@ -680,31 +736,161 @@ static int halBlueAlsaRegister(CtlPluginT* plugin, const char * interface) {
 
 	halBlueAlsaFetchTransports(watch);
 
-    if (bluealsa_subscribe(watch->fd, transport_mask) == -1) {
-        AFB_API_ERROR(plugin->api, "BlueALSA subscription failed: %s", strerror(errno));
+    if (bluealsa_event_subscribe(watch->fd, transport_mask) == -1) {
+    	AFB_API_ERROR(plugin->api, "BlueALSA subscription failed: %s", strerror(errno));
     	goto fail;
     }
 
-    // Register sound event to the main loop of the binder
+    // Register transport change event to the main loop of the binder
     if ((ret = sd_event_add_io(sdLoop, &evtsrc, watch->fd, EPOLLIN, halBlueAlsaTransportEventCB, watch)) < 0) {
-        AFB_API_ERROR(plugin->api,
+    	AFB_API_ERROR(plugin->api,
         		     "%s: Failed to register event fd to io loop",
 					 __func__);
         goto fail;
     }
+
 	return 0;
 
 fail:
+	if (watch->interface)
+		free((char*)watch->interface);
 	if (watch->fd)
 		close(watch->fd);
 	if (watch)
 		free(watch);
+
 	return -1;
 }
 
+/* Notification callback for DBus "NameOwnerChanged event.
+ * Notice that since the dbus name of bluez-alsa daemon has a prefix
+ * for the hci interface,
+ * (eg, org.bluez-alsa.hci0, org.bluez-alsa.hci1 .., it is not possible
+ * to set a match rule when registering the callback, so we have to perform
+ * the filtering for the service name within the callback instead */
+
+static int name_changed_cb(sd_bus_message *m, void *userdata, sd_bus_error * ret_error) {
+
+	CtlPluginT * plugin = (CtlPluginT*) userdata;
+
+	const char * signature = sd_bus_message_get_signature(m, 1);
+
+	if (strcmp(signature,"sss") != 0) {
+        AFB_API_ERROR(plugin->api, "%s: wrong message signature '%s'", __func__, signature);
+		goto done;
+	}
+
+	const char *name;
+	const char *owner_old;
+	const char *owner_new;
+
+	if (sd_bus_message_read(m, "sss", &name, &owner_old, &owner_new) < 0) {
+        AFB_API_ERROR(plugin->api, "%s: failed to read message parameters", __func__);
+		goto done;
+	}
+
+	if (!strstr(name, BLUEZALSA_DBUS_NAME_PREFIX))
+		goto done;
+
+	if (owner_old != NULL && owner_old[0] != '\0') {
+        AFB_API_INFO(plugin->api, "bluez-alsa: %s disappeared", name);
+		halBlueAlsaUnregister(plugin, name);
+	}
+
+	if (owner_new != NULL && owner_new[0] != '\0') {
+        AFB_API_INFO(plugin->api, "bluez-alsa %s appeared", name);
+		halBlueAlsaRegister(plugin, name);
+	}
+
+done:
+	return 0;
+}
+
+/*
+ * Callback for the DBus "ListNames" call.
+ * This will list all the available services on DBus (or more precisely,
+ * the ones that have registered a name, because it is not mandatory)
+ * The "ListNames" is done at startup to get the initial list of available
+ * bluez-alsa daemons to connect to.
+ * After, we use the NameOwnerChanged signals for the notification of new
+ * instances of bluez-alsa, or when it disappears */
+
+static int sd_bus_list_message_handler (sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+
+	const char * signature = sd_bus_message_get_signature(m, 1);
+	int ret;
+
+	CtlPluginT * plugin = (CtlPluginT*) userdata;
+
+	if (strcmp(signature,"as") != 0) {
+		AFB_API_ERROR(plugin->api, "%s: wrong message signature: '%s'", __func__, signature);
+		goto done;
+	}
+
+	const char * string = NULL;
+
+	if ( (ret = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s")) < 0) {
+		AFB_API_ERROR(plugin->api, "failed to enter container, err=%s\n", strerror(-ret));
+		goto failed;
+	}
+
+	for (;;) {
+		ret = sd_bus_message_read(m, "s", &string);
+		if (ret < 0) {
+			AFB_API_ERROR(plugin->api, "%s: failed to read string", __func__);
+			goto done;
+		}
+
+		if (ret == 0)
+			break;
+
+		if (strstr(string, BLUEZALSA_DBUS_NAME_PREFIX) != 0) {
+			halBlueAlsaRegister(plugin, string);
+		}
+	}
+
+done:
+	sd_bus_message_exit_container(m);
+
+failed:
+	return 0;
+}
+
 
 static int halBlueAlsaRegisterAll(CtlPluginT* plugin) {
-    /* TODO add a watch to all the available interfaces */
-	halBlueAlsaRegister(plugin, "hci0");
+	sd_bus_slot * slot = NULL;
+	struct sd_bus *bus = afb_api_get_system_bus(plugin->api);
+	int ret;
+
+	if (!bus) {
+		AFB_API_ERROR(plugin->api, "%s: Unable to get a DBus connection", __func__);
+		goto failed;
+	}
+
+	AFB_API_ERROR(plugin->api, "Ask DBus for the list of services");
+
+	ret = sd_bus_call_method_async(bus,
+								   &slot,
+								   ORG_FREEDESKTOP_DBUS_NAME,
+								   ORG_FREEDESKTOP_DBUS_PATH,
+								   ORG_FREEDESKTOP_DBUS_INTERFACE,
+								   "ListNames",
+								   sd_bus_list_message_handler,
+								   plugin,
+								   NULL);
+	if (ret < 0) {
+		AFB_API_ERROR(plugin->api, "Unable to request service list from DBus: %s", strerror(-ret));
+		goto failed;
+	}
+
+	char * match = "type='signal',sender='" ORG_FREEDESKTOP_DBUS_NAME "', interface='" ORG_FREEDESKTOP_DBUS_INTERFACE "'";
+
+	if (sd_bus_add_match(bus, &slot, match, name_changed_cb, plugin) < 0) {
+		AFB_API_ERROR(plugin->api, "Unable to add the dbus signal match rule");
+		goto failed;
+	}
+
 	return 0;
+failed:
+	return -1;
 }