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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [BlueZ PATCH v3 1/4] client/player: Add support for Metadata in BAP Profile
Date:   Mon,  1 May 2023 15:44:07 -0700
Message-Id: <20230501224410.1119023-1-luiz.dentz@gmail.com>
MIME-Version: 1.0
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From: Abhay Maheta <abhay.maheshbhai.maheta@intel.com>

This adds support for Metadata in BAP profile.
In order to register zero Metadata, 0 shall be
entered when prompted.

[bluetooth]# endpoint.register 00002bc9-0000-1000-8000-00805f9b34fb 0x06
[/local/endpoint/ep0] Enter Metadata (value/no): n
[/local/endpoint/ep0] Auto Accept (yes/no): y
[/local/endpoint/ep0] CIG (auto/value): a
[/local/endpoint/ep0] CIS (auto/value): a
Capabilities:
  03 01 ff 00 02 02 03 02 03 03 05 04 1e 00 f0 00  ................
Endpoint /local/endpoint/ep0 registered
---
 client/player.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 85 insertions(+), 2 deletions(-)

diff --git a/client/player.c b/client/player.c
index 5572cc566e79..cc35721d85b7 100644
--- a/client/player.c
+++ b/client/player.c
@@ -70,6 +70,7 @@ struct endpoint {
 	uint16_t cid;
 	uint16_t vid;
 	struct iovec *caps;
+	struct iovec *meta;
 	bool auto_accept;
 	bool acquiring;
 	uint8_t cig;
@@ -1582,6 +1583,7 @@ struct endpoint_config {
 	GDBusProxy *proxy;
 	struct endpoint *ep;
 	struct iovec *caps;
+	struct iovec *meta;
 	uint8_t target_latency;
 	const struct codec_qos *qos;
 };
@@ -1592,6 +1594,7 @@ static void append_properties(DBusMessageIter *iter,
 	DBusMessageIter dict;
 	struct codec_qos *qos = (void *)cfg->qos;
 	const char *key = "Capabilities";
+	const char *meta = "Metadata";
 
 	dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, "{sv}", &dict);
 
@@ -1602,6 +1605,15 @@ static void append_properties(DBusMessageIter *iter,
 					DBUS_TYPE_BYTE, &cfg->caps->iov_base,
 					cfg->caps->iov_len);
 
+	if (cfg->meta->iov_len) {
+		g_dbus_dict_append_basic_array(&dict, DBUS_TYPE_STRING, &meta,
+				DBUS_TYPE_BYTE, &cfg->meta->iov_base,
+				cfg->meta->iov_len);
+
+		bt_shell_printf("Metadata:\n");
+		bt_shell_hexdump(cfg->meta->iov_base, cfg->meta->iov_len);
+	}
+
 	if (!qos)
 		goto done;
 
@@ -1699,6 +1711,9 @@ static DBusMessage *endpoint_select_properties_reply(struct endpoint *ep,
 	iov_append(&cfg->caps, preset->data.iov_base, preset->data.iov_len);
 	cfg->target_latency = preset->target_latency;
 
+	/* Copy metadata */
+	iov_append(&cfg->meta, cfg->ep->meta->iov_base, cfg->ep->meta->iov_len);
+
 	if (preset->qos.phy)
 		/* Set QoS parameters */
 		cfg->qos = &preset->qos;
@@ -1847,6 +1862,12 @@ static void endpoint_free(void *data)
 		g_free(ep->caps);
 	}
 
+	if (ep->meta) {
+		if (ep->meta->iov_base)
+			g_free(ep->meta->iov_base);
+		g_free(ep->meta);
+	}
+
 	if (ep->msg)
 		dbus_message_unref(ep->msg);
 
@@ -1917,10 +1938,38 @@ static gboolean endpoint_vendor_exists(const GDBusPropertyTable *property,
 	return ep->cid && ep->vid;
 }
 
+static gboolean endpoint_get_metadata(const GDBusPropertyTable *property,
+					DBusMessageIter *iter, void *data)
+{
+	struct endpoint *ep = data;
+	DBusMessageIter array;
+
+	dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
+				DBUS_TYPE_BYTE_AS_STRING, &array);
+
+	dbus_message_iter_append_fixed_array(&array, DBUS_TYPE_BYTE,
+				&ep->meta->iov_base,
+				ep->meta->iov_len);
+
+	dbus_message_iter_close_container(iter, &array);
+
+	return TRUE;
+}
+
+static gboolean endpoint_metadata_exists(const GDBusPropertyTable *property,
+							void *data)
+{
+	struct endpoint *ep = data;
+
+	return ep->meta ? TRUE : FALSE;
+}
+
 static const GDBusPropertyTable endpoint_properties[] = {
 	{ "UUID", "s", endpoint_get_uuid, NULL, NULL },
 	{ "Codec", "y", endpoint_get_codec, NULL, NULL },
 	{ "Capabilities", "ay", endpoint_get_capabilities, NULL, NULL },
+	{ "Metadata", "ay", endpoint_get_metadata, NULL,
+				endpoint_metadata_exists },
 	{ "Vendor", "u", endpoint_get_vendor, NULL, endpoint_vendor_exists },
 	{ }
 };
@@ -1930,6 +1979,7 @@ static void register_endpoint_setup(DBusMessageIter *iter, void *user_data)
 	struct endpoint *ep = user_data;
 	DBusMessageIter dict;
 	const char *key = "Capabilities";
+	const char *meta = "Metadata";
 
 	dbus_message_iter_append_basic(iter, DBUS_TYPE_OBJECT_PATH, &ep->path);
 
@@ -1955,6 +2005,15 @@ static void register_endpoint_setup(DBusMessageIter *iter, void *user_data)
 		bt_shell_hexdump(ep->caps->iov_base, ep->caps->iov_len);
 	}
 
+	if (ep->meta) {
+		g_dbus_dict_append_basic_array(&dict, DBUS_TYPE_STRING, &meta,
+				DBUS_TYPE_BYTE, &ep->meta->iov_base,
+				ep->meta->iov_len);
+
+		bt_shell_printf("Metadata:\n");
+		bt_shell_hexdump(ep->meta->iov_base, ep->meta->iov_len);
+	}
+
 	dbus_message_iter_close_container(iter, &dict);
 }
 
@@ -2072,6 +2131,30 @@ static void endpoint_auto_accept(const char *input, void *user_data)
 	bt_shell_prompt_input(ep->path, "CIG (auto/value):", endpoint_cig, ep);
 }
 
+static void endpoint_set_metadata(const char *input, void *user_data)
+{
+	struct endpoint *ep = user_data;
+
+	if (!strcasecmp(input, "n") || !strcasecmp(input, "no")) {
+		free(ep->meta->iov_base);
+		ep->meta = NULL;
+		goto done;
+	}
+
+	if (!ep->meta)
+		ep->meta = g_new0(struct iovec, 1);
+
+	ep->meta->iov_base = str2bytearray((char *) input, &ep->meta->iov_len);
+	if (!ep->meta->iov_base) {
+		free(ep->meta);
+		ep->meta = NULL;
+	}
+
+done:
+	bt_shell_prompt_input(ep->path, "Auto Accept (yes/no):",
+					endpoint_auto_accept, ep);
+}
+
 static void endpoint_set_capabilities(const char *input, void *user_data)
 {
 	struct endpoint *ep = user_data;
@@ -2091,8 +2174,8 @@ static void endpoint_set_capabilities(const char *input, void *user_data)
 		ep->caps->iov_len = 0x00;
 	}
 
-	bt_shell_prompt_input(ep->path, "Auto Accept (yes/no):",
-						endpoint_auto_accept, ep);
+	bt_shell_prompt_input(ep->path, "Enter Metadata (value/no):",
+					endpoint_set_metadata, ep);
 }
 
 static char *uuid_generator(const char *text, int state)
-- 
2.40.0