[pulseaudio-discuss] [RFC v3 02/16] bluetooth: Parse the tree returned by ObjectManager
Tanu Kaskinen
tanu.kaskinen at intel.com
Thu Apr 25 02:30:44 PDT 2013
Note to self (and other potential reviewers), because I will forget this
if it's not on the mailing list: Mikel said in IRC that "there's a small
fix needed in patch 2 after BlueZ 5 fixed a bug in the documentation,
where a property is now marked as optional".
-- Tanu
On Fri, 2013-04-19 at 14:44 +0200, Mikel Astiz wrote:
> From: Mikel Astiz <mikel.astiz at bmw-carit.de>
>
> Parse the result of ObjectManager.GetManagedObjects(), which includes
> all objects registered, their interfaces and the corresponding
> properties per interface.
> ---
> src/modules/bluetooth/bluetooth-util.c | 125 +++++++++++++++++++++++++++++++--
> 1 file changed, 119 insertions(+), 6 deletions(-)
>
> diff --git a/src/modules/bluetooth/bluetooth-util.c b/src/modules/bluetooth/bluetooth-util.c
> index 1883c8a..9a0a2e1 100644
> --- a/src/modules/bluetooth/bluetooth-util.c
> +++ b/src/modules/bluetooth/bluetooth-util.c
> @@ -362,8 +362,6 @@ static int parse_device_property(pa_bluetooth_device *d, DBusMessageIter *i, boo
>
> dbus_message_iter_recurse(i, &variant_i);
>
> -/* pa_log_debug("Parsing property org.bluez.Device.%s", key); */
> -
> switch (dbus_message_iter_get_arg_type(&variant_i)) {
>
> case DBUS_TYPE_STRING: {
> @@ -452,6 +450,11 @@ static int parse_device_property(pa_bluetooth_device *d, DBusMessageIter *i, boo
> uuiddata.uuid = value;
> pa_hook_fire(&d->discovery->hooks[PA_BLUETOOTH_HOOK_DEVICE_UUID_ADDED], &uuiddata);
>
> + if (d->discovery->version >= BLUEZ_VERSION_5) {
> + dbus_message_iter_next(&ai);
> + continue;
> + }
> +
> /* Vudentz said the interfaces are here when the UUIDs are announced */
> if (strcasecmp(HSP_AG_UUID, value) == 0 || strcasecmp(HFP_AG_UUID, value) == 0) {
> pa_assert_se(m = dbus_message_new_method_call("org.bluez", d->path, "org.bluez.HandsfreeGateway",
> @@ -867,16 +870,25 @@ static void register_endpoint(pa_bluetooth_discovery *y, const char *path, const
> send_and_add_to_pending(y, m, register_endpoint_reply, pa_xstrdup(endpoint));
> }
>
> +static void register_adapter_endpoints(pa_bluetooth_discovery *y, const char *path) {
> + register_endpoint(y, path, A2DP_SOURCE_ENDPOINT, A2DP_SOURCE_UUID);
> + register_endpoint(y, path, A2DP_SINK_ENDPOINT, A2DP_SINK_UUID);
> +
> + /* For BlueZ 5, only A2DP is registered in the Media API */
> + if (y->version >= BLUEZ_VERSION_5)
> + return;
> +
> + register_endpoint(y, path, HFP_AG_ENDPOINT, HFP_AG_UUID);
> + register_endpoint(y, path, HFP_HS_ENDPOINT, HFP_HS_UUID);
> +}
> +
> static void found_adapter(pa_bluetooth_discovery *y, const char *path) {
> DBusMessage *m;
>
> pa_assert_se(m = dbus_message_new_method_call("org.bluez", path, "org.bluez.Adapter", "GetProperties"));
> send_and_add_to_pending(y, m, get_properties_reply, NULL);
>
> - register_endpoint(y, path, HFP_AG_ENDPOINT, HFP_AG_UUID);
> - register_endpoint(y, path, HFP_HS_ENDPOINT, HFP_HS_UUID);
> - register_endpoint(y, path, A2DP_SOURCE_ENDPOINT, A2DP_SOURCE_UUID);
> - register_endpoint(y, path, A2DP_SINK_ENDPOINT, A2DP_SINK_UUID);
> + register_adapter_endpoints(y, path);
> }
>
> static void list_adapters(pa_bluetooth_discovery *y) {
> @@ -887,10 +899,94 @@ static void list_adapters(pa_bluetooth_discovery *y) {
> send_and_add_to_pending(y, m, get_properties_reply, NULL);
> }
>
> +static int parse_device_properties(pa_bluetooth_device *d, DBusMessageIter *i, bool is_property_change) {
> + DBusMessageIter element_i;
> + int ret = 0;
> +
> + dbus_message_iter_recurse(i, &element_i);
> +
> + while (dbus_message_iter_get_arg_type(&element_i) == DBUS_TYPE_DICT_ENTRY) {
> + DBusMessageIter dict_i;
> +
> + dbus_message_iter_recurse(&element_i, &dict_i);
> +
> + if (parse_device_property(d, &dict_i, is_property_change))
> + ret = -1;
> +
> + dbus_message_iter_next(&element_i);
> + }
> +
> + if (!d->name || !d->address || !d->alias || d->paired < 0 || d->trusted < 0) {
> + pa_log_error("Non-optional information missing for device %s", d->path);
> + d->device_info_valid = -1;
> + return -1;
> + }
> +
> + d->device_info_valid = 1;
> + return ret;
> +}
> +
> +static int parse_interfaces_and_properties(pa_bluetooth_discovery *y, DBusMessageIter *dict_i) {
> + DBusMessageIter element_i;
> + const char *path;
> +
> + pa_assert(dbus_message_iter_get_arg_type(dict_i) == DBUS_TYPE_OBJECT_PATH);
> + dbus_message_iter_get_basic(dict_i, &path);
> +
> + pa_assert_se(dbus_message_iter_next(dict_i));
> + pa_assert(dbus_message_iter_get_arg_type(dict_i) == DBUS_TYPE_ARRAY);
> +
> + dbus_message_iter_recurse(dict_i, &element_i);
> +
> + while (dbus_message_iter_get_arg_type(&element_i) == DBUS_TYPE_DICT_ENTRY) {
> + DBusMessageIter iface_i;
> + const char *interface;
> +
> + dbus_message_iter_recurse(&element_i, &iface_i);
> +
> + pa_assert(dbus_message_iter_get_arg_type(&iface_i) == DBUS_TYPE_STRING);
> + dbus_message_iter_get_basic(&iface_i, &interface);
> +
> + pa_assert_se(dbus_message_iter_next(&iface_i));
> + pa_assert(dbus_message_iter_get_arg_type(&iface_i) == DBUS_TYPE_ARRAY);
> +
> + if (pa_streq(interface, "org.bluez.Adapter1")) {
> + pa_log_debug("Adapter %s found", path);
> + register_adapter_endpoints(y, path);
> + } else if (pa_streq(interface, "org.bluez.Device1")) {
> + pa_bluetooth_device *d;
> +
> + if (pa_hashmap_get(y->devices, path)) {
> + pa_log("Found duplicated D-Bus path for device %s", path);
> + return -1;
> + }
> +
> + pa_log_debug("Device %s found", path);
> +
> + d = device_new(y, path);
> + pa_hashmap_put(y->devices, d->path, d);
> +
> + /* FIXME: BlueZ 5 doesn't support the old Audio interface, and thus
> + it's not possible to know if any audio profile is about to be
> + connected. This can introduce regressions with modules such as
> + module-card-restore */
> + d->audio_state = PA_BT_AUDIO_STATE_DISCONNECTED;
> +
> + if (parse_device_properties(d, &iface_i, false) < 0)
> + return -1;
> + }
> +
> + dbus_message_iter_next(&element_i);
> + }
> +
> + return 0;
> +}
> +
> static void get_managed_objects_reply(DBusPendingCall *pending, void *userdata) {
> DBusMessage *r;
> pa_dbus_pending *p;
> pa_bluetooth_discovery *y;
> + DBusMessageIter arg_i, element_i;
>
> pa_assert_se(p = userdata);
> pa_assert_se(y = p->context_data);
> @@ -911,6 +1007,23 @@ static void get_managed_objects_reply(DBusPendingCall *pending, void *userdata)
> pa_log_info("D-Bus ObjectManager detected so assuming BlueZ version 5.");
> y->version = BLUEZ_VERSION_5;
>
> + if (!dbus_message_iter_init(r, &arg_i) || !pa_streq(dbus_message_get_signature(r), "a{oa{sa{sv}}}")) {
> + pa_log("Invalid reply signature for GetManagedObjects().");
> + goto finish;
> + }
> +
> + dbus_message_iter_recurse(&arg_i, &element_i);
> + while (dbus_message_iter_get_arg_type(&element_i) == DBUS_TYPE_DICT_ENTRY) {
> + DBusMessageIter dict_i;
> +
> + dbus_message_iter_recurse(&element_i, &dict_i);
> +
> + /* Ignore errors here and proceed with next object */
> + parse_interfaces_and_properties(y, &dict_i);
> +
> + dbus_message_iter_next(&element_i);
> + }
> +
> finish:
> dbus_message_unref(r);
>
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