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From:   Silviu Florian Barbulescu <silviu.barbulescu@nxp.com>
To:     linux-bluetooth@vger.kernel.org
Cc:     Silviu Florian Barbulescu <silviu.barbulescu@nxp.com>
Subject: [PATCH v4 2/4] Update bluetoothctl with support for broadcast source
Date:   Wed,  7 Jun 2023 11:22:58 +0300
Message-Id: <20230607082300.4970-3-silviu.barbulescu@nxp.com>
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This adds bluetoothctl support for broadcast source.
To test the current implementation use bluetoothctl with the commands:
endpoint.register 00001852-0000-1000-8000-00805f9b34fb 0x06
endpoint.config <created endpoint> <local endpoint> 16_2_1
transport.acquire <created transport>
transport.send <created transport> <file.wav>

---
 client/player.c | 226 ++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 201 insertions(+), 25 deletions(-)

diff --git a/client/player.c b/client/player.c
index a9f56fb94..389fc1d07 100644
--- a/client/player.c
+++ b/client/player.c
@@ -74,11 +74,13 @@ struct endpoint {
 	bool auto_accept;
 	bool acquiring;
 	uint8_t max_transports;
-	uint8_t cig;
-	uint8_t cis;
+	uint8_t iso_group;
+	uint8_t iso_stream;
 	char *transport;
 	DBusMessage *msg;
 	struct preset *preset;
+	bool broadcast;
+	struct iovec *bcode;
 };
 
 static DBusConnection *dbus_conn;
@@ -104,6 +106,22 @@ struct transport {
 	struct io *timer_io;
 };
 
+static const uint8_t base_lc3_16_2_1[] = {
+	0x28, 0x00, 0x00, /* Presentation Delay */
+	0x01, /* Number of Subgroups */
+	0x01, /* Number of BIS */
+	0x06, 0x00, 0x00, 0x00, 0x00, /* Code ID = LC3 (0x06) */
+	0x11, /* Codec Specific Configuration */
+	0x02, 0x01, 0x03, /* 16 KHZ */
+	0x02, 0x02, 0x01, /* 10 ms */
+	0x05, 0x03, 0x01, 0x00, 0x00, 0x00,  /* Front Left */
+	0x03, 0x04, 0x28, 0x00, /* Frame Length 40 bytes */
+	0x04, /* Metadata */
+	0x03, 0x02, 0x02, 0x00, /* Audio Context: Convertional */
+	0x01, /* BIS */
+	0x00, /* Codec Specific Configuration */
+};
+
 static void endpoint_unregister(void *data)
 {
 	struct endpoint *ep = data;
@@ -1154,6 +1172,16 @@ static const struct capabilities {
 	CODEC_CAPABILITIES(PAC_SOURCE_UUID, LC3_ID,
 					LC3_DATA(LC3_FREQ_ANY, LC3_DURATION_ANY,
 						3u, 30, 240)),
+	/* Broadcast LC3 Source:
+	 *
+	 * Frequencies: 8Khz 11Khz 16Khz 22Khz 24Khz 32Khz 44.1Khz 48Khz
+	 * Duration: 7.5 ms 10 ms
+	 * Channel count: 3
+	 * Frame length: 30-240
+	 */
+	CODEC_CAPABILITIES(BAA_SERVICE_UUID, LC3_ID,
+					LC3_DATA(LC3_FREQ_ANY, LC3_DURATION_ANY,
+						3u, 30, 240)),
 };
 
 struct codec_qos {
@@ -1435,6 +1463,7 @@ static struct preset {
 	PRESET(A2DP_SINK_UUID, A2DP_CODEC_SBC, sbc_presets, 6),
 	PRESET(PAC_SINK_UUID, LC3_ID, lc3_presets, 3),
 	PRESET(PAC_SOURCE_UUID, LC3_ID, lc3_presets, 3),
+	PRESET(BAA_SERVICE_UUID,  LC3_ID, lc3_presets, 3),
 };
 
 static void parse_vendor_codec(const char *codec, uint16_t *vid, uint16_t *cid)
@@ -1707,6 +1736,27 @@ struct endpoint_config {
 	const struct codec_qos *qos;
 };
 
+#define BCODE {0x01, 0x02, 0x68, 0x05, 0x53, 0xf1, 0x41, 0x5a, \
+				0xa2, 0x65, 0xbb, 0xaf, 0xc6, 0xea, 0x03, 0xb8}
+
+static struct bt_iso_qos bcast_qos = {
+		.bcast = {
+			.big = BT_ISO_QOS_BIG_UNSET,
+			.bis = BT_ISO_QOS_BIS_UNSET,
+			.sync_interval = 0x07,
+			.packing = 0x00,
+			.framing = 0x00,
+			.encryption = 0x00,
+			.bcode = BCODE,
+			.options = 0x00,
+			.skip = 0x0000,
+			.sync_timeout = 0x4000,
+			.sync_cte_type = 0x00,
+			.mse = 0x00,
+			.timeout = 0x4000,
+		}
+	};
+
 static void append_properties(DBusMessageIter *iter,
 						struct endpoint_config *cfg)
 {
@@ -1714,6 +1764,7 @@ static void append_properties(DBusMessageIter *iter,
 	struct codec_qos *qos = (void *)cfg->qos;
 	const char *key = "Capabilities";
 	const char *meta = "Metadata";
+	const char *keyBCode = "BroadcastCode";
 
 	dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, "{sv}", &dict);
 
@@ -1742,16 +1793,27 @@ static void append_properties(DBusMessageIter *iter,
 					DBUS_TYPE_BYTE, &cfg->target_latency);
 	}
 
-	if (cfg->ep->cig != BT_ISO_QOS_CIG_UNSET) {
-		bt_shell_printf("CIG 0x%2.2x\n", cfg->ep->cig);
+	if ((!cfg->ep->broadcast) &&
+			(cfg->ep->iso_group != BT_ISO_QOS_GROUP_UNSET)) {
+		bt_shell_printf("CIG 0x%2.2x\n", cfg->ep->iso_group);
 		g_dbus_dict_append_entry(&dict, "CIG", DBUS_TYPE_BYTE,
-							&cfg->ep->cig);
+							&cfg->ep->iso_group);
+	} else {
+		bt_shell_printf("BIG 0x%2.2x\n", bcast_qos.bcast.big);
+		g_dbus_dict_append_entry(&dict, "BIG", DBUS_TYPE_BYTE,
+							&bcast_qos.bcast.big);
 	}
 
-	if (cfg->ep->cis != BT_ISO_QOS_CIS_UNSET) {
-		bt_shell_printf("CIS 0x%2.2x\n", cfg->ep->cis);
+	if ((!cfg->ep->broadcast) &&
+			(cfg->ep->iso_stream != BT_ISO_QOS_STREAM_UNSET)) {
+		bt_shell_printf("CIS 0x%2.2x\n", cfg->ep->iso_stream);
 		g_dbus_dict_append_entry(&dict, "CIS", DBUS_TYPE_BYTE,
-							&cfg->ep->cis);
+							&cfg->ep->iso_stream);
+
+	} else {
+		bt_shell_printf("BIS 0x%2.2x\n", bcast_qos.bcast.bis);
+		g_dbus_dict_append_entry(&dict, "BIS", DBUS_TYPE_BYTE,
+							&bcast_qos.bcast.bis);
 	}
 
 	bt_shell_printf("Interval %u\n", qos->interval);
@@ -1759,10 +1821,19 @@ static void append_properties(DBusMessageIter *iter,
 	g_dbus_dict_append_entry(&dict, "Interval", DBUS_TYPE_UINT32,
 						&qos->interval);
 
-	bt_shell_printf("Framing %s\n", qos->framing ? "true" : "false");
+	if (!cfg->ep->broadcast) {
+		bt_shell_printf("Framing %s\n",
+					qos->framing ? "true" : "false");
 
-	g_dbus_dict_append_entry(&dict, "Framing", DBUS_TYPE_BOOLEAN,
-						&qos->framing);
+		g_dbus_dict_append_entry(&dict, "Framing", DBUS_TYPE_BOOLEAN,
+							&qos->framing);
+	} else {
+		bt_shell_printf("Framing %s\n",
+				bcast_qos.bcast.framing ? "true" : "false");
+
+		g_dbus_dict_append_entry(&dict, "Framing", DBUS_TYPE_BOOLEAN,
+						&bcast_qos.bcast.framing);
+	}
 
 	bt_shell_printf("PHY %s\n", qos->phy);
 
@@ -1787,6 +1858,57 @@ static void append_properties(DBusMessageIter *iter,
 	g_dbus_dict_append_entry(&dict, "Delay", DBUS_TYPE_UINT32,
 						&qos->delay);
 
+	if (!cfg->ep->broadcast)
+		goto done;
+
+	bt_shell_printf("SyncInterval %u\n", bcast_qos.bcast.sync_interval);
+
+	g_dbus_dict_append_entry(&dict, "SyncInterval", DBUS_TYPE_BYTE,
+						&bcast_qos.bcast.sync_interval);
+
+	bt_shell_printf("Encryption %u\n", bcast_qos.bcast.encryption);
+
+	g_dbus_dict_append_entry(&dict, "Encryption", DBUS_TYPE_BYTE,
+						&bcast_qos.bcast.encryption);
+
+	bt_shell_printf("Options %u\n", bcast_qos.bcast.options);
+
+	g_dbus_dict_append_entry(&dict, "Options", DBUS_TYPE_BYTE,
+						&bcast_qos.bcast.options);
+
+	bt_shell_printf("Skip %u\n", bcast_qos.bcast.skip);
+
+	g_dbus_dict_append_entry(&dict, "Skip", DBUS_TYPE_UINT16,
+						&bcast_qos.bcast.skip);
+
+	bt_shell_printf("SyncTimeout %u\n", bcast_qos.bcast.sync_timeout);
+
+	g_dbus_dict_append_entry(&dict, "SyncTimeout", DBUS_TYPE_UINT16,
+						&bcast_qos.bcast.sync_timeout);
+
+	bt_shell_printf("SyncCteType %u\n", bcast_qos.bcast.sync_cte_type);
+
+	g_dbus_dict_append_entry(&dict, "SyncCteType", DBUS_TYPE_BYTE,
+					&bcast_qos.bcast.sync_cte_type);
+
+	bt_shell_printf("MSE %u\n", bcast_qos.bcast.mse);
+
+	g_dbus_dict_append_entry(&dict, "MSE", DBUS_TYPE_BYTE,
+						&bcast_qos.bcast.mse);
+
+	bt_shell_printf("Timeout %u\n", bcast_qos.bcast.timeout);
+
+	g_dbus_dict_append_entry(&dict, "Timeout", DBUS_TYPE_UINT16,
+						&bcast_qos.bcast.timeout);
+
+	bt_shell_printf("BroadcastCode:\n");
+	bt_shell_hexdump(cfg->ep->bcode->iov_base, cfg->ep->bcode->iov_len);
+
+	g_dbus_dict_append_basic_array(&dict, DBUS_TYPE_STRING, &keyBCode,
+						DBUS_TYPE_BYTE,
+						&cfg->ep->bcode->iov_base,
+						cfg->ep->bcode->iov_len);
+
 done:
 	dbus_message_iter_close_container(iter, &dict);
 }
@@ -2239,14 +2361,14 @@ fail:
 
 }
 
-static void endpoint_cis(const char *input, void *user_data)
+static void endpoint_iso_stream(const char *input, void *user_data)
 {
 	struct endpoint *ep = user_data;
 	char *endptr = NULL;
 	int value;
 
 	if (!strcasecmp(input, "a") || !strcasecmp(input, "auto")) {
-		ep->cis = BT_ISO_QOS_CIS_UNSET;
+		ep->iso_stream = BT_ISO_QOS_STREAM_UNSET;
 	} else {
 		value = strtol(input, &endptr, 0);
 
@@ -2255,20 +2377,20 @@ static void endpoint_cis(const char *input, void *user_data)
 			return bt_shell_noninteractive_quit(EXIT_FAILURE);
 		}
 
-		ep->cis = value;
+		ep->iso_stream = value;
 	}
 
 	endpoint_register(ep);
 }
 
-static void endpoint_cig(const char *input, void *user_data)
+static void endpoint_iso_group(const char *input, void *user_data)
 {
 	struct endpoint *ep = user_data;
 	char *endptr = NULL;
 	int value;
 
 	if (!strcasecmp(input, "a") || !strcasecmp(input, "auto")) {
-		ep->cig = BT_ISO_QOS_CIG_UNSET;
+		ep->iso_group = BT_ISO_QOS_GROUP_UNSET;
 	} else {
 		value = strtol(input, &endptr, 0);
 
@@ -2277,10 +2399,15 @@ static void endpoint_cig(const char *input, void *user_data)
 			return bt_shell_noninteractive_quit(EXIT_FAILURE);
 		}
 
-		ep->cig = value;
+		ep->iso_group = value;
 	}
 
-	bt_shell_prompt_input(ep->path, "CIS (auto/value):", endpoint_cis, ep);
+	if (!ep->broadcast)
+		bt_shell_prompt_input(ep->path, "CIS (auto/value):",
+			endpoint_iso_stream, ep);
+	else
+		bt_shell_prompt_input(ep->path, "BIS (auto/value):",
+			endpoint_iso_stream, ep);
 }
 
 static void endpoint_max_transports(const char *input, void *user_data)
@@ -2302,13 +2429,24 @@ static void endpoint_max_transports(const char *input, void *user_data)
 		ep->max_transports = value;
 	}
 
-	bt_shell_prompt_input(ep->path, "CIG (auto/value):", endpoint_cig, ep);
+	if (ep->broadcast)
+		bt_shell_prompt_input(ep->path, "BIG (auto/value):",
+			endpoint_iso_group, ep);
+	else
+		bt_shell_prompt_input(ep->path, "CIG (auto/value):",
+			endpoint_iso_group, ep);
 }
 
 static void endpoint_auto_accept(const char *input, void *user_data)
 {
 	struct endpoint *ep = user_data;
 
+	if (!strcmp(ep->uuid, BAA_SERVICE_UUID)) {
+		ep->broadcast = true;
+	} else {
+		ep->broadcast = false;
+	}
+
 	if (!strcasecmp(input, "y") || !strcasecmp(input, "yes")) {
 		ep->auto_accept = true;
 		bt_shell_prompt_input(ep->path, "Max Transports (auto/value):",
@@ -2321,7 +2459,12 @@ static void endpoint_auto_accept(const char *input, void *user_data)
 		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 	}
 
-	bt_shell_prompt_input(ep->path, "CIG (auto/value):", endpoint_cig, ep);
+	if (ep->broadcast)
+		bt_shell_prompt_input(ep->path, "BIG (auto/value):",
+					endpoint_iso_group, ep);
+	else
+		bt_shell_prompt_input(ep->path, "CIG (auto/value):",
+					endpoint_iso_group, ep);
 }
 
 static void endpoint_set_metadata(const char *input, void *user_data)
@@ -2598,9 +2741,17 @@ static void cmd_config_endpoint(int argc, char *argv[])
 			goto fail;
 		}
 
-		/* Copy capabilities */
-		iov_append(&cfg->caps, preset->data.iov_base,
-						preset->data.iov_len);
+		if (cfg->ep->broadcast) {
+			iov_append(&cfg->ep->bcode, bcast_qos.bcast.bcode,
+				sizeof(bcast_qos.bcast.bcode));
+			/* Copy capabilities for broadcast*/
+			iov_append(&cfg->caps, base_lc3_16_2_1,
+				sizeof(base_lc3_16_2_1));
+		} else {
+			/* Copy capabilities */
+			iov_append(&cfg->caps, preset->data.iov_base,
+							preset->data.iov_len);
+		}
 
 		/* Set QoS parameters */
 		cfg->qos = &preset->qos;
@@ -3050,8 +3201,8 @@ static void register_endpoints(GDBusProxy *proxy)
 								ep->cid);
 		ep->max_transports = UINT8_MAX;
 		ep->auto_accept = true;
-		ep->cig = BT_ISO_QOS_CIG_UNSET;
-		ep->cis = BT_ISO_QOS_CIS_UNSET;
+		ep->iso_group = BT_ISO_QOS_GROUP_UNSET;
+		ep->iso_stream = BT_ISO_QOS_STREAM_UNSET;
 		endpoint_register(ep);
 	}
 }
@@ -3595,6 +3746,7 @@ static void cmd_acquire_transport(int argc, char *argv[])
 {
 	GDBusProxy *proxy;
 	int i;
+	struct endpoint *ep, *link;
 
 	for (i = 1; i < argc; i++) {
 		proxy = g_dbus_proxy_lookup(transports, NULL, argv[i],
@@ -3610,6 +3762,30 @@ static void cmd_acquire_transport(int argc, char *argv[])
 			return bt_shell_noninteractive_quit(EXIT_FAILURE);
 		}
 
+		ep = find_ep_by_transport(g_dbus_proxy_get_path(proxy));
+		if (!ep || ep->acquiring) {
+			bt_shell_printf(
+				"Transport %s already in acquiring process\n",
+				argv[i]);
+			return bt_shell_noninteractive_quit(EXIT_FAILURE);
+		}
+
+		ep->acquiring = true;
+
+		link = find_link_by_proxy(proxy);
+		if (link) {
+			bt_shell_printf("Link %s found\n", link->transport);
+			/* If link already acquiring wait it to be complete */
+			if (link->acquiring) {
+				bt_shell_printf(
+					"Link %s is in acquiring process\n",
+					argv[i]);
+				return bt_shell_noninteractive_quit(
+								EXIT_FAILURE);
+			}
+			link->acquiring = true;
+		}
+
 		if (!g_dbus_proxy_method_call(proxy, "Acquire", NULL,
 						acquire_reply, proxy, NULL)) {
 			bt_shell_printf("Failed acquire transport\n");
-- 
2.34.1