1 files changed, 93 insertions, 0 deletions
diff --git a/spa/plugins/bluez5/hci.c b/spa/plugins/bluez5/hci.c
new file mode 100644
index 0000000..88dc1fc
--- /dev/null
+++ b/spa/plugins/bluez5/hci.c
@@ -0,0 +1,93 @@
+/* Spa HSP/HFP native backend HCI support
+ *
+ * Copyright © 2022 Pauli Virtanen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+
+#include "defs.h"
+
+#ifndef HAVE_BLUEZ_5_HCI
+
+int spa_bt_adapter_has_msbc(struct spa_bt_adapter *adapter)
+{
+	if (adapter->msbc_probed)
+		return adapter->has_msbc;
+	return -EOPNOTSUPP;
+}
+
+#else
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+#include <bluetooth/hci_lib.h>
+
+int spa_bt_adapter_has_msbc(struct spa_bt_adapter *adapter)
+{
+	int hci_id, res;
+	int sock = -1;
+	uint8_t features[8], max_page = 0;
+	struct sockaddr_hci a;
+	const char *str;
+
+	if (adapter->msbc_probed)
+		return adapter->has_msbc;
+
+	str = strrchr(adapter->path, '/');  /* hciXX */
+	if (str == NULL || sscanf(str, "/hci%d", &hci_id) != 1 || hci_id < 0)
+		return -ENOENT;
+
+	sock = socket(AF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC, BTPROTO_HCI);
+	if (sock < 0)
+		goto error;
+
+	memset(&a, 0, sizeof(a));
+	a.hci_family = AF_BLUETOOTH;
+	a.hci_dev = hci_id;
+	if (bind(sock, (struct sockaddr *) &a, sizeof(a)) < 0)
+		goto error;
+
+	if (hci_read_local_ext_features(sock, 0, &max_page, features, 1000) < 0)
+		goto error;
+
+	close(sock);
+
+	adapter->msbc_probed = true;
+	adapter->has_msbc = ((features[2] & LMP_TRSP_SCO) && (features[3] & LMP_ESCO)) ? 1 : 0;
+	return adapter->has_msbc;
+
+error:
+	res = -errno;
+	if (sock >= 0)
+		close(sock);
+	return res;
+}
+
+#endif